CN106550483A - A kind of connection establishment method and apparatus - Google Patents
A kind of connection establishment method and apparatus Download PDFInfo
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- CN106550483A CN106550483A CN201510593301.4A CN201510593301A CN106550483A CN 106550483 A CN106550483 A CN 106550483A CN 201510593301 A CN201510593301 A CN 201510593301A CN 106550483 A CN106550483 A CN 106550483A
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- H—ELECTRICITY
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- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W76/20—Manipulation of established connections
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Abstract
The invention discloses a kind of connection establishment method and apparatus.Connection establishment method in the present invention includes：Base station sends short transmission time interval TTI connection configured information to user equipment (UE) during radio resource control RRC establishment of connection, and the short TTI connections configured information is used to indicate that the preset time that UE connects according to short TTI in configured information opens short TTI communication patterns；The preset time that base station connects according to short TTI in configured information opens short TTI communication patterns, and sets up RRC with UE by short TTI communication patterns and be connected.The present invention solves the problems, such as short TTI communication connections how are set up in existing LTE system, so as to by short TTI technologies are applied in LTE system so that LTE system more effectively supports low time delay business.
Description
Technical Field
The present invention relates to the field of wireless communications technologies, and in particular, to a method and an apparatus for establishing a connection.
Background
With the continuous increase of network service demands, the number and types of terminals are increasing explosively. The fifth Generation mobile Communication technology (5th Generation, abbreviated as "5G") has become a trend of future network development, and Machine Type Communication (MTC) is one of important scenes and technical means of a 5G system, and reducing the time delay of MTC is one of important ways to improve the performance of the 5G system.
The access technology of short Transmission Time Interval is a mode of shortening processing delay and return delay by reducing Transmission Time Interval (TTI) of Long Term Evolution (LTE) system, so as to support ultra-low delay requirement of some services. There are two methods for reducing the TTI, one is to reduce the duration of a single OFDM symbol by expanding the subcarrier spacing of an Orthogonal Frequency Division Multiplexing (OFDM) system. Another method is to reduce the TTI length by reducing the number of OFDM symbols in a single TTI, as discussed in the current third Generation Partnership Project (3 GPP), which has the advantage of being fully compatible with existing LTE systems; however, the current discussion of the short TTI access by the 3GPP is still in the technology evaluation phase, that is, the effect of the short TTI on the delay reduction is being analyzed and evaluated, and how to apply the short TTI technology to the existing LTE system becomes a problem that needs to be solved at present.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a connection establishment method and apparatus, so as to solve the problem of how to establish a short TTI communication connection in the existing LTE system, so that the LTE system can more effectively support a low latency service by applying the short TTI technology to the LTE system.
In a first aspect, the present invention provides a connection establishing method, including:
a base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the establishment process of Radio Resource Control (RRC) connection, wherein the short TTI connection indication information is used for indicating the UE to start a short TTI communication mode according to preset time in the short TTI connection indication information;
and the base station starts the short TTI communication mode according to the preset time in the short TTI connection indication information and establishes the RRC connection with the UE through the short TTI communication mode.
In a first possible implementation manner of the first aspect, before the base station sends the short transmission time interval TTI connection indication information to the user equipment UE in the process of establishing the radio resource control RRC connection, the method further includes:
the base station receives an RRC connection request message sent by the UE, wherein the RRC connection request message comprises short TTI connection request information;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
and when the base station sends an RRC connection establishment message to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
In a second possible implementation manner of the first aspect, before the base station sends the short transmission time interval TTI connection indication information to the user equipment UE in the process of establishing the radio resource control RRC connection, the method further includes:
the base station receives an RRC connection establishment completion message sent by the UE, wherein the RRC connection establishment completion message comprises short TTI connection request information;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
when the base station sends an RRC connection reconfiguration request message to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message; or,
and the base station sends the RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
In a third possible implementation manner of the first aspect, before the base station sends the short transmission time interval TTI connection indication information to the user equipment UE in the process of establishing the radio resource control RRC connection, the method further includes:
the base station broadcasts short TTI communication information, the short TTI communication information comprises a short TTI service special random access sequence group, and the short TTI communication information is used for indicating the UE to select a short TTI service special random access sequence from the short TTI service special random access sequence group and send the short TTI service special random access sequence to the base station after determining to carry out short TTI communication;
the base station receives a short TTI special random access sequence sent by the UE, and the short TTI special random access sequence is used for indicating the UE to request the short TTI communication to the base station;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
when the base station sends a random access response to the UE, carrying the short TTI connection indication information in the random access response; or,
and the base station sends the RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
According to a third possible implementation manner of the first aspect, in a fourth possible implementation manner, the group of short TTI service dedicated random access sequences is a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; the short TTI communication information is further used for indicating the UE to select one random access sequence from a group of short TTI service dedicated random access sequences corresponding to the TTI length indicated by the short TTI communication information to send to the base station after the short TTI communication is determined.
In a fifth possible implementation manner of the first aspect, before the base station sends the short transmission time interval TTI connection indication information to the user equipment UE in the process of establishing the radio resource control RRC connection, the method further includes:
after determining to perform short TTI communication, the base station sends a paging message to the UE, wherein the paging message is used for indicating the UE to start a random access process of the RRC connection;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
and when the base station sends an RRC connection establishment message to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
In a sixth possible implementation manner of the first aspect, before the base station sends the short transmission time interval TTI connection indication information to the user equipment UE in the process of establishing the radio resource control RRC connection, the method further includes:
the base station determines to perform short TTI communication with the UE in the establishment process of the RRC connection;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
and when the base station sends an RRC connection reconfiguration request message to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message.
In a second aspect, the present invention provides a connection establishing method, including:
user Equipment (UE) receives short Transmission Time Interval (TTI) connection indication information sent by a base station in the establishment process of Radio Resource Control (RRC) connection, wherein the short TTI connection indication information is used for indicating the UE to start a short TTI communication mode according to preset time in the short TTI connection indication information;
and the UE starts a short TTI communication mode according to the preset time in the short TTI connection indication information and establishes the RRC connection with the base station through the short TTI communication mode.
In a first possible implementation manner of the second aspect, before the receiving, by the UE, short transmission time interval, TTI, connection indication information sent by a base station in a process of establishing a radio resource control, RRC, the method further includes:
the UE sends an RRC connection request message to the base station, wherein the RRC connection request message comprises short TTI connection request information;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
and the UE receives an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
In a second possible implementation manner of the second aspect, before the receiving, by the UE, short transmission time interval, TTI, connection indication information sent by a base station in a process of establishing a radio resource control, RRC, the method further includes:
the UE sends an RRC connection establishment completion message to the base station, wherein the RRC connection establishment completion message comprises short TTI connection request information;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
the UE receives an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the connection indication information of the short TTI; or,
and the UE receives an RRC downlink message created by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
In a third possible implementation manner of the second aspect, before the receiving, by the UE, short transmission time interval, TTI, connection indication information sent by a base station in a process of establishing a radio resource control, RRC, the method further includes:
the UE receives short TTI communication information broadcasted by the base station, wherein the short TTI communication information comprises a short TTI service special random access sequence group;
after determining to perform short TTI communication, the UE selects a short TTI service special random access sequence from the short TTI service special random access sequence group and sends the sequence to the base station;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
the UE receives a random access response sent by the base station, wherein the random access response carries the short TTI connection indication information; or,
and the UE receives an RRC downlink message created by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
According to a third possible implementation manner of the second aspect, in a fourth possible implementation manner, the group of short TTI service dedicated random access sequences is a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; the UE selects a short TTI service special random access sequence from the short TTI service special random access sequence group and sends the short TTI service special random access sequence to the base station, and the method comprises the following steps:
and the UE selects one short TTI special random access sequence from a group of short TTI special random access sequences corresponding to the TTI length indicated by the short TTI communication information and sends the sequence to the base station.
In a fifth possible implementation manner of the second aspect, before the receiving, by the UE, short transmission time interval, TTI, connection indication information sent by a base station in a process of establishing a radio resource control, RRC, the method further includes:
the UE receives a paging message broadcasted by the base station and starts a random access process of the RRC connection according to the paging message;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
and the UE receives an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
In a sixth possible implementation manner of the second aspect, the short TTI connection indication information is carried in the RRC connection reconfiguration request message after the base station determines that short TTI communication is performed with the UE in the RRC connection establishment process;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
and the UE receives an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the connection indication information of the short TTI.
In a third aspect, the present invention provides a connection establishment apparatus, provided in a base station, the connection establishment apparatus including:
a sending module, configured to send short Transmission Time Interval (TTI) connection indication information to a User Equipment (UE) in a process of establishing a Radio Resource Control (RRC) connection, where the TTI connection indication information is used to indicate the UE to start a short TTI communication mode according to a preset time in the TTI connection indication information;
a starting module, configured to start the short TTI communication mode according to a preset time in the short TTI connection indication information;
and the establishing module is used for establishing the RRC connection with the UE through the short TTI communication mode started by the starting module.
In a first possible implementation manner of the third aspect, the apparatus further includes: a receiving module, configured to receive an RRC connection request message sent by the UE before the sending module sends short TTI connection indication information to the UE in an RRC connection establishment process, where the RRC connection request message includes short TTI connection request information;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: and when the RRC connection establishment message is sent to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
In a second possible implementation manner of the third aspect, the apparatus further includes: a receiving module, configured to receive an RRC connection establishment complete message sent by the UE before the sending module sends short TTI connection indication information to the UE in an RRC connection establishment process, where the RRC connection establishment complete message includes short TTI connection request information;
the sending module is configured to send short TTI connection indication information, where the sending module is configured to: when an RRC connection reconfiguration request message is sent to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message; or sending an RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
In a third possible implementation manner of the third aspect, the sending module is further configured to broadcast short TTI communication information before sending short TTI connection indication information to the UE in a RRC connection establishment process, where the short TTI communication information includes a short TTI service dedicated random access sequence group, and the short TTI communication information is used to indicate that the UE selects one short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group to send to the base station after determining to perform short TTI communication;
the device further comprises: a receiving module, configured to receive a short TTI service dedicated random access sequence sent by the UE, where the short TTI service dedicated random access sequence is used to indicate to the base station that the UE requests the short TTI communication;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: when a random access response is sent to the UE, carrying the short TTI connection indication information in the random access response; or sending an RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
According to a third possible implementation manner of the third aspect, in a fourth possible implementation manner, the group of short TTI service dedicated random access sequences is a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; the short TTI communication information is further used for indicating the UE to select one random access sequence from a group of short TTI service dedicated random access sequences corresponding to the TTI length indicated by the short TTI communication information to send to the base station after the short TTI communication is determined.
In a fifth possible implementation manner of the third aspect, the sending module is further configured to send a paging message to the UE before sending short TTI connection indication information to the UE in a RRC connection establishment process and after determining that short TTI communication is performed, where the paging message is used to indicate the UE to start a random access procedure of the RRC connection;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: and when the RRC connection establishment message is sent to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
In a sixth possible implementation manner of the third aspect, the apparatus further includes: a determining module, configured to determine, before the sending module sends the short TTI connection indication information to the UE in a RRC connection establishment procedure, that short TTI communication is performed with the UE in the RRC connection establishment procedure;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: and when the RRC connection reconfiguration request message is sent to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message.
In a fourth aspect, the present invention provides a connection establishment apparatus, configured in a user equipment UE, where the connection establishment apparatus includes:
a receiving module, configured to receive short Transmission Time Interval (TTI) connection indication information sent by a base station in a process of establishing a Radio Resource Control (RRC) connection, where the short TTI connection indication information is used to indicate, to the UE, that the base station starts a short TTI communication mode according to a preset time in the short TTI connection indication information;
a starting module, configured to start a short TTI communication mode according to a preset time in the short TTI connection indication information received by the receiving module;
and the establishing module is used for establishing the RRC connection with the base station through the short TTI communication mode started by the starting module.
In a first possible implementation manner of the fourth aspect, the connection establishing apparatus further includes: a sending module, configured to send, by the receiving module, an RRC connection request message to a base station before receiving short TTI connection indication information sent by the base station in an RRC connection establishment process, where the RRC connection request message includes short TTI connection request information;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: and receiving an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
In a second possible implementation manner of the fourth aspect, the connection establishing apparatus further includes: a sending module, configured to send, by the receiving module, an RRC connection setup complete message to a base station before receiving short TTI connection indication information sent by the base station in a RRC connection setup process, where the RRC connection setup complete message includes short TTI connection request information;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: receiving an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the indication information of the short TTI connection; or receiving an RRC downlink message created by the base station, where the RRC downlink message carries the short TTI connection indication information.
In a third possible implementation manner of the fourth aspect, the receiving module is further configured to receive short TTI communication information broadcasted by the base station before receiving short TTI connection indication information sent by the base station in a RRC connection establishment process, where the short TTI communication information includes a short TTI service dedicated random access sequence group;
the connection establishing apparatus further includes: a sending module, configured to select a short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group and send the selected short TTI service dedicated random access sequence to the base station after determining to perform short TTI communication;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: receiving a random access response sent by the base station, wherein the random access response carries the short TTI connection indication information; or receiving an RRC downlink message created by the base station, where the RRC downlink message carries the short TTI connection indication information.
According to a third possible implementation manner of the fourth aspect, in a fourth possible implementation manner, the group of short TTI service dedicated random access sequences is a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; the sending module is configured to select a short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group and send the selected short TTI service dedicated random access sequence to the base station, where the selecting module is configured to: and selecting one short TTI service special random access sequence from a group of short TTI service special random access sequences corresponding to the TTI length indicated by the short TTI communication information and sending the sequence to the base station.
In a fifth possible implementation manner of the fourth aspect, the receiving module is further configured to receive a paging message broadcast by a base station before receiving short TTI connection indication information sent by the base station in an RRC connection establishment process, and start a random access process of the RRC connection according to the paging message;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: and receiving an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
In a sixth possible implementation manner of the fourth aspect, the short TTI connection indication information is carried in the RRC connection reconfiguration request message after the base station determines that short TTI communication is performed with the UE in the RRC connection establishment process;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: and receiving an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the short TTI connection indication information.
The invention provides a connection establishment method and a device.A base station sends short TTI connection indication information to UE in the establishment process of RRC connection so as to indicate the UE to start a short TTI communication mode according to the preset time in the short TTI connection indication information, the base station also starts the short TTI communication mode according to the preset time in the short TTI connection indication information, and then the base station and the UE establish RRC connection through the started short TTI communication mode; the method provided by the embodiment realizes the establishment of the short TTI connection in the LTE system, and designs the short TTI access technology compatible with the LTE system.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a flow chart of RRC connection establishment in a conventional LTE system;
fig. 2 is a flowchart of a connection establishment method according to an embodiment of the present invention;
FIG. 3 is a frame structure diagram of a short TTI communication in the connection establishment method according to the embodiment of the present invention shown in FIG. 2;
FIG. 4 is a frame structure diagram of another short TTI communication in the connection establishment method provided by the embodiment of FIG. 2 in accordance with the present invention;
fig. 5 is a flowchart of another connection establishment method according to an embodiment of the present invention;
fig. 6 is a flowchart of another connection establishment method according to an embodiment of the present invention;
fig. 7 is a flowchart of a further connection establishment method according to an embodiment of the present invention;
fig. 8 is a flowchart of a further connection establishment method according to an embodiment of the present invention;
fig. 9 is a flowchart of a further connection establishing method according to an embodiment of the present invention;
fig. 10 is a flowchart of a further connection establishment method according to an embodiment of the present invention;
fig. 11 is a flowchart of a further connection establishing method according to an embodiment of the present invention;
fig. 12 is a signaling interaction flowchart of a connection establishment method according to an embodiment of the present invention;
fig. 13 is a signaling interaction flowchart of another connection establishment method according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a connection establishing apparatus according to an embodiment of the present invention;
fig. 15 is a schematic structural diagram of another connection establishment apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
The rapid development of mobile internet, internet of things, and other network service applications has become a major driving force for the development of 5G technology. At present, the 5G technology is urgently required to have the access rate of optical fibers, the connection capacity of billions of equipment, perfect real-time experience and the wireless broadband access capacity anytime and anywhere; in addition, energy consumption efficiency, spectral efficiency, peak rate and the like are also important indexes in the design of the 5G system. China in 2013 established a 5G vision and general roadmap (IMT-2020) push group to drive the development of 5G technology, and according to the international overall situation, it is expected that the 5G vision, key capacity requirements and spectrum planning will be formed in 2015, after which the standardization work of the 5G technology will be initiated and will start to be in commercial use after 2020. In terms of international standards, the technical standard of the long term evolution Advanced (LTE-Advanced) is mainly formulated by the 3GPP international standardization organization, and it is preliminarily considered that the standard research work facing the 5G technology will be started in the 3GPP R14 stage.
As one of important scenes and technical means of a 5G system, MTC has four major main stream requirements, namely, huge connection, low energy consumption, low time delay and high reliability. In terms of the number of connections, the user capacity required to be supported by a future 5G system can reach 30-300 ten thousand user equipment in each cell, and 99.99% of the area can be covered; in the aspect of energy consumption, the battery service time of the user equipment needs to be prolonged by 10 times in the 5G system compared with the current service time, and the service time is 5-10 years; in terms of delay, a 5G system needs to reduce the end-to-end delay by 5 times, which can be as small as 5ms, wherein the air interface delay can be as small as 1 ms; in terms of reliability, the reliability requirement of security-related messages is as high as 99.999%. In practical application, different applications may have different combinations of requirements according to specific situations, and the combinations may be one of the above four requirements, or different combinations of the above four requirements, or even all four requirements.
The embodiments provided by the invention specifically improve the performance of the future 5G system by reducing the time delay, and the embodiments of the invention realize the compatibility of the short TTI technology and the existing LTE system by introducing the short TTI technology into the existing LTE system, and the mode of applying the short TTI technology to the LTE system in the following embodiments can be also applied to the future 5G system, so that the embodiments have universal applicability.
Before introducing a specific implementation manner of an embodiment of the present invention, a procedure for establishing a Radio Resource Control (RRC) connection in an LTE system is briefly described, as shown in fig. 1, which is a flow chart for establishing an RRC connection in an existing LTE system, where the establishment of the RRC connection involves signaling interaction between a base station, a User Equipment (UE) and a mobility management entity, and as shown in fig. 1, the establishment of the RRC connection must be completed through 16 steps, and specifically, a standard flow for establishing an RRC connection in an existing LTE communication includes the following steps:
s1, the UE sends a random access preamble to the base station, where the random access preamble may be, for example, a random access sequence;
s2, the base station returns a random access response to the UE;
s3, the UE sends RRC connection request information to the base station;
s4, the base station returns RRC connection establishment information to the UE;
s5, the UE sends RRC connection establishment completion information to the base station;
s6, the base station sends an initial user information request message to the mobile management entity;
s7, the mobile management entity returns the initial context establishment request message to the base station;
s8, the base station sends an encryption signaling to the UE;
s9, the base station sends RRC connection reconfiguration request information to the UE;
s10, the UE returns an encryption completion message to the base station;
s11, the UE returns an RRC connection reconfiguration completion message to the base station;
s12, the base station returns an initial context establishment response message to the mobile management entity;
s13, the mobile management entity sends a bearing establishment request message to the base station;
s14, the base station sends a bearing-RRC connection reconfiguration request message to the UE;
s15, the UE returns a bearer-RRC connection reconfiguration complete message to the base station;
and S16, the base station returns a bearing establishment completion message to the mobile management entity.
The technical solution of the present invention is described in detail below by using specific embodiments, and the connection establishment method in the following embodiments of the present invention is performed in the RRC connection process. The following specific embodiments of the present invention may be combined, and the same or similar concepts or processes may not be described in detail in some embodiments.
Fig. 2 is a flowchart of a connection establishment method according to an embodiment of the present invention. The connection establishment method provided by this embodiment is applicable to the case of establishing a short TTI communication connection during a network connection, and the method may be executed by a connection establishment apparatus, where the connection establishment apparatus is implemented by combining hardware and software, and the apparatus may be integrated in a processor of a base station for being invoked by the processor. As shown in fig. 2, the method of this embodiment may include:
s110, the base station sends short TTI connection indication information to the UE in the establishment process of the RRC connection, wherein the short TTI connection indication information is used for indicating the UE to start a short TTI communication mode according to the preset time in the short TTI connection indication information.
In this embodiment, in order to be compatible with the existing LTE system and reduce the waiting time of data as much as possible, a Physical Downlink Shared Channel (PDSCH) and a Physical Uplink Shared Channel (PUSCH) are divided into a part in a frequency division manner for performing short TTI access communication, fig. 3 is a schematic frame structure of one short TTI communication in the connection establishment method provided in the embodiment of the present invention shown in fig. 2, fig. 4 is a schematic frame structure of another short TTI communication in the connection establishment method provided in the embodiment of the present invention shown in fig. 2, fig. 3 is an access communication in which a part of Downlink resources are divided into a PDSCH as a short TTI, fig. 4 is an access communication in which a part of Uplink resources are divided into a PUSCH, and in the communication channels shown in fig. 3 and 4, other conventional PUSCH resources and conventional PUSCH resources are still performed, each conventional LTE control channel and its format protection are unchanged.
The short TTI communication in this embodiment may be accessed in the RRC connection establishment process of the LTE system, that is, the method steps provided in this embodiment are executed in the RRC connection establishment process, specifically, the base station may carry the short TTI connection indication information in one of the RRC downlink messages in the standard flow of the RRC connection shown in fig. 1, for example, the short TTI connection indication information may be carried in S4 or S9, or an independent RRC downlink message may be created by the base station, and the short TTI connection indication information is carried in the created RRC downlink message; and when the UE receives the short TTI connection indication information, the short TTI communication mode may be started according to a preset time in the short TTI connection indication information, where the preset time may specify a starting time, a starting frame number, or a starting subframe number for starting the short TTI communication mode for the base station.
S120, the base station starts a short TTI communication mode according to the preset time in the short TTI connection indication information, and establishes RRC connection with the UE through the short TTI communication mode.
In this embodiment, when the UE receives the short TTI connection indication information, the short TTI communication mode may be started according to the preset time in the indication information, and meanwhile, after the other party that establishes the RRC connection, that is, the base station sends the short TTI connection indication information, the short TTI communication mode may also be started according to the preset time in the indication information, and the base station and the UE may complete the establishment of the RRC connection through the started short TTI communication mode.
For example, if the base station sends the short TTI connection indication information in S4 in fig. 1, after S4, the base station and the UE both start the short TTI communication mode, and continue to complete the establishment of the RRC connection in the procedure after S4 in the short TTI communication mode; if the base station transmits the short TTI connection indication information in S9 in fig. 1, after S9, both the base station and the UE start the short TTI communication mode, and continue to complete the establishment of the RRC connection in the procedure after S9 in the short TTI communication mode.
It should be noted that, in the short TTI communication mode in each embodiment of the present invention, the communication is performed by using a short TTI technology, that is, after the short TTI communication mode is started, the time interval for both communicating parties to send data is smaller than the time interval for conventional TTI communication; that is to say, in the process of establishing the RRC connection, in this embodiment, through a downlink message in the RRC standard flow or short TTI connection indication information carried in one downlink message created in the RRC standard flow, the two communicating parties are instructed to establish the RRC connection through the short TTI communication mode, and the short TTI access technology is applied to the LTE system, so that the technology is compatible with the existing network.
In the connection establishment method provided by this embodiment, a base station sends short TTI connection indication information to a UE in an RRC connection establishment procedure to indicate the UE to start a short TTI communication mode according to a preset time in the short TTI connection indication information, and the base station also starts the short TTI communication mode according to the preset time in the short TTI connection indication information, and then the base station and the UE establish an RRC connection through the started short TTI communication mode; the method provided by the embodiment realizes the establishment of the short TTI connection in the LTE system, designs the short TTI access technology compatible with the LTE system, and solves the problem of how to establish the short TTI communication connection in the existing LTE system, so that the LTE system can more effectively support the low-delay service by applying the short TTI technology to the LTE system.
Optionally, fig. 5 is a flowchart of another connection establishment method provided in an embodiment of the present invention, based on the embodiment shown in fig. 4, where a requester of short TTI communication in this embodiment is a UE, that is, the UE determines to perform short TTI communication according to its own capability information and service requirements, and then instructs a base station to send short TTI connection indication information; in a specific implementation, before S110, the present embodiment further includes: s100, a base station receives an RRC connection request message sent by UE, wherein the RRC connection request message comprises short TTI connection request information; accordingly, S110 in the present embodiment may be replaced with: when the base station sends the RRC connection establishment message to the UE, the RRC connection establishment message carries the short TTI connection indication information. The short TTI connection indication information in this embodiment is carried in S4 in the RRC standard procedure shown in fig. 1 and sent to the UE.
It should be noted that, because the RRC connection request message is the second message after the UE sends the random access sequence in the random access process, the length of the message is usually a fixed value, and the available space is limited, in order to overcome this problem, the UE may also select to carry the short TTI connection request information in the RRC connection setup complete message. In another possible implementation manner of the embodiment of the present invention, S100 may further be: a base station receives an RRC connection establishment completion message sent by UE, wherein the RRC connection establishment completion message comprises short TTI connection request information; accordingly, S110 in this implementation may be: when the base station sends the RRC connection reconfiguration request message to the UE, the RRC connection reconfiguration request message carries short TTI connection indication information, and in this implementation, the short TTI connection indication information is sent to the UE in S9 carried in the RRC standard flow shown in fig. 1; since the base station in this embodiment needs to perform context establishment interaction with the mobility management entity after receiving the short TTI connection request message in S5 of the RRC standard procedure shown in fig. 1, and then sends the encrypted signaling to the UE, and then can transmit the short TTI connection indication message to the UE in the RRC connection reconfiguration request message, such an implementation delays the time for starting the short TTI communication.
In a specific implementation, in order to further speed up the start-up procedure of short TTI communication, optionally, S110 in this implementation may also be: the base station sends the RRC downlink message created by the base station to the UE, where the RRC downlink message carries the short TTI connection indication information, that is, the base station in this embodiment may send an independent RRC downlink message that carries the short TTI connection indication information to the UE immediately after receiving the TTI connection request information.
Fig. 6 is a flowchart of another connection establishing method according to an embodiment of the present invention, also based on the embodiment shown in fig. 4, a requester for short TTI communication in this embodiment is also a UE, and unlike the embodiment shown in fig. 5, the UE in this embodiment instructs a base station to send short TTI connection indication information through a short TTI service dedicated random access sequence; in a specific implementation, before S110, the present embodiment further includes: s100, a base station broadcasts short TTI communication information, the short TTI communication information comprises a short TTI service special random access sequence group, the short TTI communication information is used for indicating UE to select a short TTI service special random access sequence from the short TTI service special random access sequence group and send the short TTI service special random access sequence to the base station after the short TTI communication is determined, S101, the base station receives the short TTI service special random access sequence sent by the UE, and the short TTI service special random access sequence is used for indicating the UE to request the short TTI communication to the base station; accordingly, S110 in this implementation may be: when the base station sends a random access response to the UE, the random access response carries short TTI connection indication information; similarly to the above embodiment, S110 in the present embodiment may also be: and the base station sends RRC downlink information created by the base station to the UE, wherein the RRC downlink information carries the connection indication information of the short TTI.
In this embodiment, the UE represents the short TTI connection request information by using a specific set of random access sequences, i.e., short TTI service specific random access sequences, and the related information of the set of short TTI service specific random access sequences is specifically notified to all UEs of the cell by the base station in the system information broadcast. In a specific implementation of this embodiment, the short TTI service dedicated random access sequence group broadcasted by the base station may be a plurality of short TTI service dedicated random access sequences defined according to TTIs of different lengths; correspondingly, the short TTI communication information is also used for indicating the UE to select a random access sequence from a group of short TTI service special random access sequences corresponding to the TTI length indicated by the short TTI communication information to send to the base station after the short TTI communication is determined; the UE in this embodiment starts the random access procedure by selecting a random sequence in different short TTI service dedicated groups according to the service requirements. It should be noted that, the short TTI communication information in this embodiment may further include capability information of the short TTI service, which is usually the transmission time interval length of the short TTI service, and the UE notifies the UE of the capability information supported by the short TTI service broadcasted by the base station during broadcasting, and the UE needs to consider whether to support the capability information of the short TTI service before determining whether to perform the short TTI communication.
In order to fully utilize the existing functions of the LTE system, the embodiment shown in fig. 5 and fig. 6 is a process for initiating short TTI connection by a base station, and in this embodiment, for initiating short TTI connection establishment by an idle UE, for example, a conventional paging method may be used to page the UE, and a base station directly sends short TTI connection indication information in a subsequent connection establishment message, as shown in fig. 7, a flowchart of another connection establishment method provided for the embodiment of the present invention also includes, before S110, on the basis of the embodiment shown in fig. 4: s100, after determining short TTI communication, a base station sends a paging message to UE, wherein the paging message is used for indicating the UE to start a random access process of RRC connection; accordingly, S110 in this implementation may be: when the base station sends the RRC connection establishment message to the UE, the RRC connection establishment message carries the short TTI connection indication information. The base station in this embodiment may also determine to perform short TTI communication according to its own capability information and service requirements, and when sending the short TTI connection indication information, the short TTI connection indication information may also be carried in S4 in the RRC standard flow shown in fig. 1 and sent to the UE.
In another case where the base station initiates the establishment of the short TTI connection, the base station may initiate the establishment of the short TTI connection for the UE that is establishing the RRC connection, that is, S100 in the embodiment shown in fig. 7 may be replaced with: the base station determines to perform short TTI communication with the UE in the RRC connection establishment process, the base station in this embodiment may determine to trigger the short TTI communication with the UE according to the UE and its own capability, service requirement, various service load conditions, or other factors, and then send an RRC connection reconfiguration request including short TTI connection indication information to the UE, where the manner in which the base station and the UE start a short TTI communication mode according to the short TTI connection indication information and subsequently establish an RRC connection is the same as that in the above embodiment, and therefore, details are not repeated here.
Further, on the basis of the foregoing embodiments, after receiving the short TTI connection indication information sent by the base station through the RRC downlink message, the UE may also carry an acknowledgement message in a subsequent RRC uplink message to notify the base station that the UE correctly receives the short TTI connection indication information sent by the base station.
Fig. 8 is a flowchart of a further connection establishing method according to an embodiment of the present invention. The connection establishment method provided by this embodiment is applicable to the case of establishing a short TTI communication connection in a network connection process, and the method may be executed by a connection establishment apparatus, where the connection establishment apparatus is implemented by combining hardware and software, and the apparatus may be integrated in a processor of a UE for being invoked by the processor. As shown in fig. 8, the method of this embodiment may include:
s210, the UE receives the short TTI connection indication information sent by the base station in the establishment process of the RRC connection, and the short TTI connection indication information is used for indicating the base station to start the short TTI communication mode according to the preset time in the short TTI connection indication information.
In this embodiment, reference may be made to fig. 3 and fig. 4 in the foregoing embodiment for a channel dedicated to short TTI access communication, and the method steps provided in this embodiment are also executed in the establishment process of RRC connection, that is, the UE acquires the short TTI connection indication information in one of RRC downlink messages in the standard flow of receiving RRC connection shown in fig. 1, for example, the base station may carry the short TTI connection indication information in S4 or S9, and the UE may also acquire the short TTI connection indication information in an independent RRC downlink message created by the receiving base station; and upon receipt of the short TTI connection indication information by the UE, it may be determined that the base station has turned on the short TTI communication mode according to a preset time in the short TTI connection indication information.
S220, the UE starts a short TTI communication mode according to the preset time in the short TTI connection indication information and establishes RRC connection with the base station through the short TTI communication mode.
In this embodiment, when the UE receives the short TTI connection indication information, the UE may also start the short TTI communication mode according to the preset time in the indication information, and the UE already knows that the other party for establishing the RRC connection, that is, the base station already starts the short TTI communication mode, so that the UE and the base station can complete establishment of the RRC connection through the started short TTI communication mode.
It should be noted that, in the short TTI communication mode in each embodiment of the present invention, the communication is performed by using a short TTI technology, that is, after the short TTI communication mode is started, the time interval for both communicating parties to send data is smaller than the time interval for conventional TTI communication; that is to say, in the process of establishing the RRC connection, in this embodiment, through a downlink message in the RRC standard flow or short TTI connection indication information carried in one downlink message created in the RRC standard flow, the two communicating parties are instructed to establish the RRC connection through the short TTI communication mode, and the short TTI access technology is applied to the LTE system, so that the technology is compatible with the existing network.
In the connection establishment method provided by this embodiment, the UE receives short TTI connection indication information sent by the base station in the RRC connection establishment process, learns, through the short TTI connection indication information, that the base station has started the short TTI communication mode according to the preset time in the short TTI connection indication information, and also starts the short TTI communication mode according to the preset time in the short TTI connection indication information, and then establishes the RRC connection with the base station through the started short TTI communication mode; the method provided by the embodiment realizes the establishment of the short TTI connection in the LTE system, designs the short TTI access technology compatible with the LTE system, and solves the problem of how to establish the short TTI communication connection in the existing LTE system, so that the LTE system can more effectively support the low-delay service by applying the short TTI technology to the LTE system.
Optionally, fig. 9 is a flowchart of a connection establishment method according to an embodiment of the present invention, where on the basis of the embodiment shown in fig. 8, a requester of short TTI communication in this embodiment is a UE, that is, after the UE determines to perform short TTI communication according to its capability information and service requirements, the UE instructs a base station to send short TTI connection indication information; in a specific implementation, before S210, the present embodiment further includes: s200, UE sends RRC connection request message to base station, the RRC connection request message includes short TTI connection request information; accordingly, S210 in this implementation may be replaced with: and the UE receives an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the connection indication information of the short TTI.
It should be noted that, because the RRC connection request message is the second message after the UE sends the random access sequence during the random access procedure, the length of the message is usually a fixed value, and the available space is limited. To overcome this problem, the UE may also choose to carry the short TTI connection request information in the RRC connection setup complete message. In another possible implementation manner of the embodiment of the present invention, S200 may further be: UE sends RRC connection establishment completion information to a base station, wherein the RRC connection establishment completion information comprises short TTI connection request information; accordingly, S210 in this implementation may be: the method comprises the steps that UE receives an RRC connection reconfiguration request message sent by a base station, wherein the RRC connection reconfiguration request message carries short TTI connection indication information; since the base station in this embodiment needs to perform context establishment interaction with the mobility management entity after receiving the short TTI connection request message in S5 of the RRC standard procedure shown in fig. 1, and then sends the encrypted signaling to the UE, and then can transmit the short TTI connection indication message to the UE in the RRC connection reconfiguration request message, such an implementation delays the time for starting the short TTI communication. In a specific implementation, in order to further speed up the start-up procedure of short TTI communication, optionally, S210 in this implementation may also be: and the UE receives an RRC downlink message established by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
Fig. 10 is a flowchart of a further connection establishing method according to an embodiment of the present invention, where also on the basis of the embodiment shown in fig. 8, a requester of short TTI communication in this embodiment is also a UE, and unlike the embodiment shown in fig. 9, the UE in this embodiment instructs a base station to send short TTI connection indication information through a short TTI service dedicated random access sequence; in a specific implementation, before S210, the present embodiment further includes: s200, UE receives short TTI communication information broadcasted by a base station, wherein the short TTI communication information comprises a short TTI service special random access sequence group; s201, after determining short TTI communication, UE selects a random access sequence special for short TTI service from a random access sequence group special for short TTI service and sends the random access sequence to a base station; accordingly, S210 in this embodiment may be: the UE receives a random access response sent by the base station, wherein the random access response carries short TTI connection indication information; similarly to the above embodiment, S210 in the present embodiment may also be: and the UE receives an RRC downlink message established by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
In a specific implementation of this embodiment, the group of short TTI service dedicated random access sequences is a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; the specific way for the UE to select the random access sequence dedicated to the short TTI service in S201 is as follows: and the UE selects one short TTI service special random access sequence from a group of short TTI service special random access sequences corresponding to the TTI length indicated by the short TTI communication information and sends the sequence to the base station.
Both the embodiments shown in fig. 9 and fig. 10 are processes for initiating short TTI connection by a UE, and in practical applications, there is also a case where a base station initiates short TTI connection establishment, in order to fully utilize the existing functions of an LTE system, this embodiment initiates short TTI connection establishment for an idle UE, for example, a conventional paging method may be used to page the UE, and the base station directly sends short TTI connection indication information in a subsequent connection establishment message, as shown in fig. 11, a flowchart of a further connection establishment method provided for the embodiment of the present invention also includes, before S210, on the basis of the embodiment shown in fig. 8: s200, UE receives a paging message broadcasted by a base station and starts a random access process of RRC connection according to the paging message; accordingly, S210 in this implementation may be: and the UE receives an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the connection indication information of the short TTI. The base station in this embodiment may also determine to perform short TTI communication according to its own capability information and service requirements, and when sending the short TTI connection indication information, the short TTI connection indication information may also be carried in S4 in the RRC standard flow shown in fig. 1 and sent to the UE.
In another case where the base station initiates the establishment of the short TTI connection, the base station may initiate a short TTI connection establishment procedure for the UE that is establishing the RRC connection, that is, S210 in the embodiment shown in fig. 11 may be replaced with: the method comprises the steps that UE receives an RRC connection reconfiguration request message sent by a base station, wherein the RRC connection reconfiguration request message carries short TTI connection indication information, and the short TTI connection indication information is carried in the RRC connection reconfiguration request message after the base station determines to carry out short TTI communication in the process of establishing RRC connection.
Further, on the basis of the foregoing embodiments, after receiving the short TTI connection indication information sent by the base station through the RRC downlink message, the UE may also carry an acknowledgement message in a subsequent RRC uplink message to notify the base station that the UE correctly receives the short TTI connection indication information sent by the base station.
Fig. 12 is a signaling interaction flowchart of a connection establishment method according to an embodiment of the present invention. The specific implementation manner of this embodiment is similar to the above embodiments shown in fig. 2 to fig. 11, where the base station also sends short TTI connection indication information to the UE in the establishment process of RRC connection, and the short TTI access communication may be compatible with the existing LTE system, as shown in fig. 12, the method provided in this embodiment includes:
first, S301, the UE sends an RRC connection request message to the base station, where the RRC connection request message includes short TTI connection request information.
S302, when the base station sends the RRC connection establishment message to the UE, the RRC connection establishment message carries the short TTI connection indication information.
S303, the base station and the UE start the short TTI communication mode according to the preset time in the short TTI connection indication information, and establish RRC connection through the short TTI communication mode. In this embodiment, the procedure executed by the base station and the UE after the short TTI communication mode is turned on is the same as the standard procedure for establishing the RRC connection shown in fig. 1, but is different from the procedure of using the turned-on short TTI communication mode when performing message interaction.
In the second mode, S301, the UE sends an RRC connection setup complete message to the base station, where the RRC connection setup complete message includes short TTI connection request information.
S302, when the base station sends the RRC connection reconfiguration request message to the UE, the RRC connection reconfiguration request message carries the short TTI connection indication information.
In this embodiment, after receiving the short TTI connection request information in S5 of the RRC standard procedure shown in fig. 1, the base station needs to perform context establishment interaction with the mobility management entity, and then sends an encrypted signaling to the UE, before transmitting the short TTI connection indication information to the UE in the RRC connection reconfiguration request message, which delays the time for starting the short TTI communication. Therefore, in order to further speed up the start-up procedure of the short TTI communication, S302 may further include: and the base station sends RRC downlink information created by the base station to the UE, wherein the RRC downlink information carries the connection indication information of the short TTI.
S303, the base station and the UE start the short TTI communication mode according to the preset time in the short TTI connection indication information, and establish RRC connection through the short TTI communication mode.
In a third mode, S301, the base station broadcasts short TTI communication information, where the short TTI communication information includes a short TTI service dedicated random access sequence group.
S302, after determining short TTI communication, UE selects a random access sequence special for short TTI service from the random access sequence group special for short TTI service.
S303, the UE sends the selected special random access sequence of the short TTI service to the base station.
S304, the base station sends a random access response to the UE, and the random access response carries the short TTI connection indication information. Similarly to the above embodiment, S303 in the present embodiment may also be: and the base station sends RRC downlink information created by the base station to the UE, wherein the RRC downlink information carries the short TTI connection indication information.
S305, the base station and the UE start the short TTI communication mode according to the preset time in the short TTI connection indication information, and establish RRC connection through the short TTI communication mode.
In this embodiment, the group of short TTI service dedicated random access sequences broadcasted by the base station may be a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; correspondingly, the method for selecting the short TTI service dedicated random access sequence by the UE in S302 may specifically be: and after determining to carry out short TTI communication, the UE selects a random access sequence from a group of short TTI service special random access sequences corresponding to the TTI length indicated by the short TTI communication information and sends the random access sequence to the base station.
It should be noted that, in the connection establishment method shown in fig. 12, the first mode to the third mode are application scenarios in which the UE initiates the establishment of the short TTI connection, the connection establishment method provided in the present invention further includes an application scenario in which the base station initiates the establishment of the short TTI connection, as shown in fig. 13, a signaling interaction flow chart of another connection establishment method provided in the embodiment of the present invention is shown, and the following fourth mode and fifth mode are application scenarios in which the base station initiates the establishment of the short TTI connection.
And a fourth mode that the base station initiates the establishment of the short TTI link to the idle UE specifically comprises the following steps:
s301, the base station determines to carry out short TTI communication.
S302, the base station sends a paging message to the UE, wherein the paging message is used for indicating the UE to start the random access process of RRC connection.
S303, the UE sends a random access preamble to the base station.
S304, the base station sends a random access response to the UE.
S305, the UE transmits an RRC connection request message to the base station.
S306, the base station sends RRC connection establishment information to the UE, and the RRC connection establishment information carries the short TTI connection indication information.
S307, the base station and the UE start the short TTI communication mode according to the preset time in the short TTI connection indication information, and establish RRC connection through the short TTI communication mode.
And a fifth mode, in which the base station initiates the establishment of the short TTI link to the UE which is establishing the RRC connection, specifically comprising the following steps:
s301, the base station determines to carry out short TTI communication with the UE in the establishment process of RRC connection.
S302, the base station sends RRC connection reconfiguration request information to the UE, and the RRC connection reconfiguration request information carries the short TTI connection indication information.
S303, the base station and the UE start the short TTI communication mode according to the preset time in the short TTI connection indication information, and establish RRC connection through the short TTI communication mode.
Further, in each of the above specific implementation manners, after receiving the short TTI connection indication information sent by the base station through the RRC downlink message, the UE may also carry an acknowledgement message in a subsequent RRC uplink message to notify the base station that the UE correctly receives the short TTI connection indication information sent by the base station.
Fig. 14 is a schematic structural diagram of a connection establishment apparatus according to an embodiment of the present invention. The connection establishing apparatus provided in this embodiment is suitable for use in the case of establishing a short TTI communication connection during a network connection, and the connection establishing apparatus is implemented by combining hardware and software, and the apparatus may be integrated in a processor of a base station for the processor to invoke. As shown in fig. 14, the connection establishing apparatus of this embodiment specifically includes: a sending module 11, a starting module 12 and a building module 13.
The sending module 11 is configured to send short TTI connection indication information to the UE during establishment of the RRC connection, where the short TTI connection indication information is used to indicate the UE to start a short TTI communication mode according to a preset time in the short TTI connection indication information.
And a starting module 12, configured to start the short TTI communication mode according to a preset time in the short TTI connection indication information.
A establishing module 13, configured to establish an RRC connection with the UE through the short TTI communication mode enabled by the enabling module 12.
The connection establishing apparatus provided in the embodiment of the present invention is used for executing the connection establishing method provided in the embodiment shown in fig. 2 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects, and are not described herein again.
Optionally, the requester of the short TTI communication in this embodiment is UE, that is, after determining to perform the short TTI communication according to the capability information of the UE and the service requirement, the UE instructs the base station to send the short TTI connection indication information; on the basis of the embodiment shown in fig. 14, the connection establishing apparatus provided in this embodiment further includes: a receiving module 14, configured to receive an RRC connection request message sent by the UE before the sending module 11 sends the short TTI connection indication information to the UE in the RRC connection establishment process, where the RRC connection request message includes the short TTI connection request information; correspondingly, in this embodiment, the specific way for the sending module 11 to send the short TTI connection indication information is as follows: and when the RRC connection establishment message is sent to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
It should be noted that, because the RRC connection request message is the second message after the UE sends the random access sequence in the random access process, the length of the message is usually a fixed value, and the available space is limited, in order to overcome this problem, the UE may also select to carry the short TTI connection request information in the RRC connection setup complete message. In another possible implementation manner of the embodiment of the present invention, the receiving module 14 is further configured to receive an RRC connection establishment completion message sent by the UE before the sending module 11 sends the short TTI connection indication information to the UE in the RRC connection establishment process, where the RRC connection establishment completion message includes short TTI connection request information; correspondingly, in this embodiment, the specific way for the sending module 11 to send the short TTI connection indication information is as follows: when an RRC connection reconfiguration request message is sent to the UE, carrying short TTI connection indication information in the RRC connection reconfiguration request message; or sending an RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
The connection establishing apparatus provided in the embodiment of the present invention is used for executing the connection establishing method provided in the embodiment shown in fig. 5 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects, and are not described herein again.
In another possible implementation manner that the requester of the short TTI communication is the UE, the method may also be implemented by the connection establishment apparatus shown in fig. 14, and specifically, the sending module 11 is further configured to broadcast short TTI communication information before sending short TTI connection indication information to the UE in the RRC connection establishment process, where the short TTI communication information includes a short TTI service dedicated random access sequence group, and the short TTI communication information is used to indicate that the UE selects one short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group to send to the base station after determining to perform short TTI communication; the receiving module 14 is further configured to receive a short TTI service dedicated random access sequence sent by the UE, where the short TTI service dedicated random access sequence is used to indicate to the base station that the UE requests short TTI communication; correspondingly, in this embodiment, the specific way for the sending module 11 to send the short TTI connection indication information is as follows: when a random access response is sent to the UE, the random access response carries short TTI connection indication information; or sending an RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
In a specific implementation of this embodiment, the group of short TTI service dedicated random access sequences is a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; the short TTI communication information is further used to instruct the UE to select one random access sequence from a group of short TTI service specific random access sequences corresponding to the TTI length indicated by the short TTI communication information to send to the base station after determining to perform short TTI communication.
The connection establishing apparatus provided in the embodiment of the present invention is used for executing the connection establishing method provided in the embodiment of fig. 6 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects and are not described herein again.
The above embodiments are all processes of initiating short TTI connection by UE, in practical applications, there is also a case where a base station initiates short TTI connection establishment, and the base station may initiate short TTI connection establishment to idle UE, and this manner may also be executed by using the connection establishment apparatus shown in fig. 14, where the specific execution manner is: the sending module 11 is further configured to send a paging message to the UE before sending the short TTI connection indication information to the UE in the RRC connection establishment process and after determining that the short TTI communication is performed, where the paging message is used to indicate the UE to start a random access process of the RRC connection; correspondingly, in this embodiment, the specific way for the sending module 11 to send the short TTI connection indication information is as follows: and when the RRC connection establishment message is sent to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
In another case where the base station initiates the establishment of the short TTI connection, the base station may initiate the establishment of the short TTI connection for the UE that is establishing the RRC connection, and specifically, the apparatus provided in this embodiment may further include: a determining module, configured to determine, by the sending module 11, short TTI communication with the UE in the RRC connection establishment process before sending the short TTI connection indication information to the UE in the RRC connection establishment process; correspondingly, in this embodiment, the specific way for the sending module 11 to send the short TTI connection indication information is as follows: when the RRC connection reconfiguration request message is sent to the UE, the short TTI connection indication information is carried in the RRC connection reconfiguration request message.
The connection establishing apparatus provided in the embodiment of the present invention is used to execute the connection establishing method provided in the embodiment of fig. 7 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects and are not described herein again.
Fig. 15 is a schematic structural diagram of another connection establishment apparatus according to an embodiment of the present invention. The connection establishing apparatus provided in this embodiment is suitable for use in the case of establishing a short TTI communication connection during a network connection, and the connection establishing apparatus is implemented by combining hardware and software, and the apparatus may be integrated in a processor of a UE for the processor to invoke. As shown in fig. 15, the connection establishing apparatus of this embodiment specifically includes: a receiving module 21, an initiating module 22 and a establishing module 23.
The receiving module 21 is configured to receive short TTI connection indication information sent by a base station in the RRC connection establishment process, where the short TTI connection indication information is used to indicate, to the UE, the base station to start a short TTI communication mode according to a preset time in the short TTI connection indication information.
A starting module 22, configured to start the short TTI communication mode according to the preset time in the short TTI connection indication information received by the receiving module 21.
A establishing module 23, configured to establish an RRC connection with the base station through the short TTI communication mode enabled by the enabling module 22.
The connection establishing apparatus provided in the embodiment of the present invention is used for executing the connection establishing method provided in the embodiment shown in fig. 8 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects and are not described herein again.
Optionally, the requester of the short TTI communication in this embodiment is UE, that is, after determining to perform the short TTI communication according to the capability information of the UE and the service requirement, the UE instructs the base station to send the short TTI connection indication information; on the basis of the embodiment shown in fig. 15, the connection establishing apparatus provided in this embodiment further includes: a sending module 24, configured to send, by the receiving module 21, an RRC connection request message to the base station before receiving, in the RRC connection establishment process, the short TTI connection indication information sent by the base station, where the RRC connection request message includes the short TTI connection request information; correspondingly, in this embodiment, the specific way for the receiving module 21 to receive the short TTI connection indication information is as follows: and receiving an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
It should be noted that, since the RRC connection request message is the second message after the UE sends the random access sequence in the random access procedure, the length of the message is usually a fixed value, and the available space is limited, in order to overcome this problem, the UE may also select to carry the short TTI connection request message in the RRC connection setup complete message. In another possible implementation manner of the embodiment of the present invention, the sending module 24 is further configured to send, to the base station, an RRC connection setup complete message before the receiving module 21 receives, in the RRC connection setup process, the short TTI connection indication information sent by the base station, where the RRC connection setup complete message includes short TTI connection request information; accordingly, the specific way for the receiving module 21 to receive the short TTI connection indication information is as follows: receiving an RRC connection reconfiguration request message sent by a base station, wherein the RRC connection reconfiguration request message carries short TTI connection indication information; or receiving an RRC downlink message created by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
The connection establishing apparatus provided in the embodiment of the present invention is used for executing the connection establishing method provided in the embodiment shown in fig. 9 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects, and are not described herein again.
In another possible implementation manner that the requester of the short TTI communication is the UE, the method may also be implemented by the connection establishing apparatus shown in fig. 13, and specifically, the receiving module 21 is further configured to receive short TTI communication information broadcasted by the base station before receiving short TTI connection indication information sent by the base station in the establishment process of the RRC connection, where the short TTI communication information includes a short TTI service dedicated random access sequence group; the sending module 24 is further configured to select one short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group to send to the base station after determining to perform short TTI communication; correspondingly, in this embodiment, the specific way for the receiving module 21 to receive the short TTI connection indication information is as follows: receiving a random access response sent by a base station, wherein the random access response carries short TTI connection indication information; or receiving an RRC downlink message created by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
In a specific implementation of this embodiment, the group of short TTI service dedicated random access sequences is a plurality of groups of short TTI service dedicated random access sequences defined according to TTIs of different lengths; the specific way for the sending module 24 to select one short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group to send to the base station is as follows: and selecting one short TTI special random access sequence from a group of short TTI special random access sequences corresponding to the TTI length indicated by the short TTI communication information and sending the sequence to the base station.
The connection establishing apparatus provided in the embodiment of the present invention is used to execute the connection establishing method provided in the embodiment shown in fig. 10 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects and are not described herein again.
The above embodiments are all processes of initiating short TTI connection by UE, in practical applications, there is also a case where a base station initiates short TTI connection establishment, and the base station may initiate short TTI connection establishment to idle UE, and this manner may also be executed by using the connection establishment apparatus shown in fig. 15, where the specific execution manner is: the receiving module 21 is further configured to receive a paging message broadcast by the base station before receiving the short TTI connection indication information sent by the base station in the RRC connection establishment process, and start a random access process of the RRC connection according to the paging message; correspondingly, in this embodiment, the specific way for the receiving module 21 to receive the short TTI connection indication information is as follows: and receiving an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
In another case that the base station initiates the establishment of the short TTI connection, the base station may initiate the establishment of the short TTI connection to the UE that is establishing the RRC connection, that is, the short TTI connection indication information in this embodiment is carried in the RRC connection reconfiguration request message after the base station determines to perform the short TTI communication with the UE in the establishment process of the RRC connection, and the specific manner for the receiving module 21 to receive the short TTI connection indication information is as follows: and receiving an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the short TTI connection indication information.
The connection establishing apparatus provided in the embodiment of the present invention is used for executing the connection establishing method provided in the embodiment shown in fig. 11 of the present invention, and has corresponding functional modules, which have similar implementation principles and technical effects, and are not described herein again.
It should be noted that, each functional module in the connection establishment apparatus provided in each embodiment of the present invention may be implemented in the form of a software functional module and may be stored in a computer readable storage medium when being sold or used as an independent product; based on such understanding, the technical solutions of the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which is stored in a storage medium and includes several instructions to enable a computer device, such as a personal computer, a server, or a network device, to execute all or part of the connection establishment methods provided by the embodiments of fig. 2 to 12 in the present invention. And the storage medium may include, for example: various media capable of storing program codes, such as a USB flash disk (USB flash disk), a mobile hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk. The present invention is not limited to any specific combination of hardware and software, and accordingly, a computer storage medium is further provided in the base station and the UE provided in the embodiment of the present invention, and a computer program is stored in the computer storage medium, and is used for executing each connection establishment method provided in the present invention.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (28)
1. A method for establishing a connection, comprising:
a base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the establishment process of Radio Resource Control (RRC) connection, wherein the short TTI connection indication information is used for indicating the UE to start a short TTI communication mode according to preset time in the short TTI connection indication information;
and the base station starts the short TTI communication mode according to the preset time in the short TTI connection indication information and establishes the RRC connection with the UE through the short TTI communication mode.
2. The connection setup method according to claim 1, wherein before the base station sends the indication information of short Transmission Time Interval (TTI) connection to the UE during the RRC connection setup, the method further comprises:
the base station receives an RRC connection request message sent by the UE, wherein the RRC connection request message comprises short TTI connection request information;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
and when the base station sends an RRC connection establishment message to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
3. The connection setup method according to claim 1, wherein before the base station sends the indication information of short Transmission Time Interval (TTI) connection to the UE during the RRC connection setup, the method further comprises:
the base station receives an RRC connection establishment completion message sent by the UE, wherein the RRC connection establishment completion message comprises short TTI connection request information;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
when the base station sends an RRC connection reconfiguration request message to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message; or,
and the base station sends the RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
4. The connection setup method according to claim 1, wherein before the base station sends the indication information of short Transmission Time Interval (TTI) connection to the UE during the RRC connection setup, the method further comprises:
the base station broadcasts short TTI communication information, the short TTI communication information comprises a short TTI service special random access sequence group, and the short TTI communication information is used for indicating the UE to select a short TTI service special random access sequence from the short TTI service special random access sequence group and send the short TTI service special random access sequence to the base station after determining to carry out short TTI communication;
the base station receives a short TTI special random access sequence sent by the UE, and the short TTI special random access sequence is used for indicating the UE to request the short TTI communication to the base station;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
when the base station sends a random access response to the UE, carrying the short TTI connection indication information in the random access response; or,
and the base station sends the RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
5. The connection setup method according to claim 4, wherein the group of short TTI service specific random access sequences are a plurality of groups of short TTI service specific random access sequences defined according to TTIs of different lengths; the short TTI communication information is further used for indicating the UE to select one random access sequence from a group of short TTI service dedicated random access sequences corresponding to the TTI length indicated by the short TTI communication information to send to the base station after the short TTI communication is determined.
6. The connection setup method according to claim 1, wherein before the base station sends the indication information of short Transmission Time Interval (TTI) connection to the UE during the RRC connection setup, the method further comprises:
after determining to perform short TTI communication, the base station sends a paging message to the UE, wherein the paging message is used for indicating the UE to start a random access process of the RRC connection;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
and when the base station sends an RRC connection establishment message to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
7. The connection setup method according to claim 1, wherein before the base station sends the indication information of short Transmission Time Interval (TTI) connection to the UE during the RRC connection setup, the method further comprises:
the base station determines to perform short TTI communication with the UE in the establishment process of the RRC connection;
the base station sends short Transmission Time Interval (TTI) connection indication information to User Equipment (UE) in the process of establishing Radio Resource Control (RRC) connection, and the method comprises the following steps:
and when the base station sends an RRC connection reconfiguration request message to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message.
8. A method for establishing a connection, comprising:
user Equipment (UE) receives short Transmission Time Interval (TTI) connection indication information sent by a base station in the establishment process of Radio Resource Control (RRC) connection, wherein the short TTI connection indication information is used for indicating the UE to start a short TTI communication mode according to preset time in the short TTI connection indication information;
and the UE starts a short TTI communication mode according to the preset time in the short TTI connection indication information and establishes the RRC connection with the base station through the short TTI communication mode.
9. The connection setup method according to claim 8, wherein before the UE receives the short transmission time interval, TTI, connection indication information sent by the base station during the setup of the RRC connection, the method further comprises:
the UE sends an RRC connection request message to the base station, wherein the RRC connection request message comprises short TTI connection request information;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
and the UE receives an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
10. The connection setup method according to claim 8, wherein before the UE receives the short transmission time interval, TTI, connection indication information sent by the base station during the setup of the RRC connection, the method further comprises:
the UE sends an RRC connection establishment completion message to the base station, wherein the RRC connection establishment completion message comprises short TTI connection request information;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
the UE receives an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the connection indication information of the short TTI; or,
and the UE receives an RRC downlink message created by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
11. The connection setup method according to claim 8, wherein before the UE receives the short transmission time interval, TTI, connection indication information sent by the base station during the setup of the RRC connection, the method further comprises:
the UE receives short TTI communication information broadcasted by the base station, wherein the short TTI communication information comprises a short TTI service special random access sequence group;
after determining to perform short TTI communication, the UE selects a short TTI service special random access sequence from the short TTI service special random access sequence group and sends the sequence to the base station;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
the UE receives a random access response sent by the base station, wherein the random access response carries the short TTI connection indication information; or,
and the UE receives an RRC downlink message created by the base station, wherein the RRC downlink message carries the short TTI connection indication information.
12. The connection setup method of claim 11, wherein the group of short TTI service specific random access sequences are a plurality of groups of short TTI service specific random access sequences defined according to TTIs of different lengths; the UE selects a short TTI service special random access sequence from the short TTI service special random access sequence group and sends the short TTI service special random access sequence to the base station, and the method comprises the following steps:
and the UE selects one short TTI special random access sequence from a group of short TTI special random access sequences corresponding to the TTI length indicated by the short TTI communication information and sends the sequence to the base station.
13. The connection setup method according to claim 8, wherein before the UE receives the short transmission time interval, TTI, connection indication information sent by the base station during the setup of the RRC connection, the method further comprises:
the UE receives a paging message broadcasted by the base station and starts a random access process of the RRC connection according to the paging message;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
and the UE receives an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
14. The connection establishing method according to claim 8, wherein the short TTI connection indication information is carried in the RRC connection reconfiguration request message after the base station determines to perform short TTI communication with the UE during the RRC connection establishing process;
the method for the user equipment UE to receive the short transmission time interval TTI connection indication information sent by the base station in the establishment process of the radio resource control RRC connection comprises the following steps:
and the UE receives an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the connection indication information of the short TTI.
15. A connection establishing apparatus provided in a base station, the connection establishing apparatus comprising:
a sending module, configured to send short Transmission Time Interval (TTI) connection indication information to a User Equipment (UE) in a process of establishing a Radio Resource Control (RRC) connection, where the TTI connection indication information is used to indicate the UE to start a short TTI communication mode according to a preset time in the TTI connection indication information;
a starting module, configured to start the short TTI communication mode according to a preset time in the short TTI connection indication information;
and the establishing module is used for establishing the RRC connection with the UE through the short TTI communication mode started by the starting module.
16. The connection setup device according to claim 15, characterized in that the device further comprises: a receiving module, configured to receive an RRC connection request message sent by the UE before the sending module sends short TTI connection indication information to the UE in an RRC connection establishment process, where the RRC connection request message includes short TTI connection request information;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: and when the RRC connection establishment message is sent to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
17. The connection setup device according to claim 15, characterized in that the device further comprises: a receiving module, configured to receive an RRC connection establishment complete message sent by the UE before the sending module sends short TTI connection indication information to the UE in an RRC connection establishment process, where the RRC connection establishment complete message includes short TTI connection request information;
the sending module is configured to send short TTI connection indication information, where the sending module is configured to: when an RRC connection reconfiguration request message is sent to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message; or sending an RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
18. The apparatus of claim 15, wherein the sending module is further configured to broadcast short TTI communication information before sending short TTI connection indication information to the UE during RRC connection establishment, where the short TTI communication information includes a short TTI service dedicated random access sequence group, and the short TTI communication information is used to indicate that the UE selects one short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group to send to the base station after determining to perform short TTI communication;
the device further comprises: a receiving module, configured to receive a short TTI service dedicated random access sequence sent by the UE, where the short TTI service dedicated random access sequence is used to indicate to the base station that the UE requests the short TTI communication;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: when a random access response is sent to the UE, carrying the short TTI connection indication information in the random access response; or sending an RRC downlink message created by the base station to the UE, wherein the RRC downlink message carries the short TTI connection indication information.
19. The apparatus according to claim 18, wherein the set of short TTI service specific random access sequences is a plurality of sets of short TTI service specific random access sequences defined according to TTIs of different lengths; the short TTI communication information is further used for indicating the UE to select one random access sequence from a group of short TTI service dedicated random access sequences corresponding to the TTI length indicated by the short TTI communication information to send to the base station after the short TTI communication is determined.
20. The apparatus of claim 15, wherein the sending module is further configured to send a paging message to the UE before sending the short TTI connection indication information to the UE during RRC connection establishment and after determining to perform short TTI communication, the paging message being used to instruct the UE to start a random access procedure of the RRC connection;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: and when the RRC connection establishment message is sent to the UE, carrying the short TTI connection indication information in the RRC connection establishment message.
21. The connection setup device according to claim 15, characterized in that the device further comprises: a determining module, configured to determine, before the sending module sends the short TTI connection indication information to the UE in a RRC connection establishment procedure, that short TTI communication is performed with the UE in the RRC connection establishment procedure;
the sending module is configured to send the short TTI connection indication information, where the sending module is configured to: and when the RRC connection reconfiguration request message is sent to the UE, carrying the short TTI connection indication information in the RRC connection reconfiguration request message.
22. A connection establishing apparatus disposed in a User Equipment (UE), the connection establishing apparatus comprising:
a receiving module, configured to receive short Transmission Time Interval (TTI) connection indication information sent by a base station in a process of establishing a Radio Resource Control (RRC) connection, where the short TTI connection indication information is used to indicate, to the UE, that the base station starts a short TTI communication mode according to a preset time in the short TTI connection indication information;
a starting module, configured to start a short TTI communication mode according to a preset time in the short TTI connection indication information received by the receiving module;
and the establishing module is used for establishing the RRC connection with the base station through the short TTI communication mode started by the starting module.
23. The connection setup device according to claim 22, characterized in that the connection setup device further comprises: a sending module, configured to send, by the receiving module, an RRC connection request message to a base station before receiving short TTI connection indication information sent by the base station in an RRC connection establishment process, where the RRC connection request message includes short TTI connection request information;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: and receiving an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
24. The connection setup device according to claim 22, characterized in that the connection setup device further comprises: a sending module, configured to send, by the receiving module, an RRC connection setup complete message to a base station before receiving short TTI connection indication information sent by the base station in a RRC connection setup process, where the RRC connection setup complete message includes short TTI connection request information;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: receiving an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the indication information of the short TTI connection; or receiving an RRC downlink message created by the base station, where the RRC downlink message carries the short TTI connection indication information.
25. The apparatus of claim 22, wherein the receiving module is further configured to receive short TTI communication information broadcasted by a base station before receiving short TTI connection indication information sent by the base station in the RRC connection establishment procedure, where the short TTI communication information includes a short TTI service dedicated random access sequence group;
the connection establishing apparatus further includes: a sending module, configured to select a short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group and send the selected short TTI service dedicated random access sequence to the base station after determining to perform short TTI communication;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: receiving a random access response sent by the base station, wherein the random access response carries the short TTI connection indication information; or receiving an RRC downlink message created by the base station, where the RRC downlink message carries the short TTI connection indication information.
26. The apparatus according to claim 25, wherein the set of short TTI service specific random access sequences is a plurality of sets of short TTI service specific random access sequences defined according to TTIs of different lengths; the sending module is configured to select a short TTI service dedicated random access sequence from the short TTI service dedicated random access sequence group and send the selected short TTI service dedicated random access sequence to the base station, where the selecting module is configured to: and selecting one short TTI service special random access sequence from a group of short TTI service special random access sequences corresponding to the TTI length indicated by the short TTI communication information and sending the sequence to the base station.
27. The apparatus of claim 22, wherein the receiving module is further configured to receive a paging message broadcasted by a base station before receiving short TTI connection indication information sent by the base station in the RRC connection establishment procedure, and start a random access procedure of the RRC connection according to the paging message;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: and receiving an RRC connection establishment message sent by the base station, wherein the RRC connection establishment message carries the short TTI connection indication information.
28. The apparatus according to claim 22, wherein the short TTI connection indication information is carried in the RRC connection reconfiguration request message after the base station determines to perform short TTI communication with the UE during the RRC connection establishment;
the receiving module is configured to receive the short TTI connection indication information, where the receiving module is configured to: and receiving an RRC connection reconfiguration request message sent by the base station, wherein the RRC connection reconfiguration request message carries the short TTI connection indication information.
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| PCT/CN2016/077541 WO2016177179A1 (en) | 2015-09-17 | 2016-03-28 | Method and device for establishing connection |
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| CN201510593301.4A CN106550483A (en) | 2015-09-17 | 2015-09-17 | A kind of connection establishment method and apparatus |
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| CN110583073A (en) * | 2017-05-05 | 2019-12-17 | 高通股份有限公司 | Shortened transmission time interval configuration based on user equipment capabilities |
| WO2021212430A1 (en) * | 2020-04-23 | 2021-10-28 | 北京小米移动软件有限公司 | Method and apparatus for sending data, and user equipment and storage medium |
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| CN104468030A (en) * | 2014-08-26 | 2015-03-25 | 上海华为技术有限公司 | Data transmission method, user equipment and base station |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110583073A (en) * | 2017-05-05 | 2019-12-17 | 高通股份有限公司 | Shortened transmission time interval configuration based on user equipment capabilities |
| CN110583073B (en) * | 2017-05-05 | 2023-03-24 | 高通股份有限公司 | Shortened transmission time interval configuration based on user equipment capabilities |
| WO2021212430A1 (en) * | 2020-04-23 | 2021-10-28 | 北京小米移动软件有限公司 | Method and apparatus for sending data, and user equipment and storage medium |
| CN113841452A (en) * | 2020-04-23 | 2021-12-24 | 北京小米移动软件有限公司 | Method, device, user equipment and storage medium for sending data |
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| WO2016177179A1 (en) | 2016-11-10 |
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