CN107948964B - Method and device for transmitting radio resource control message - Google Patents

Abstract

The present invention provides a radio resource control message transmission method and device, which relate to the field of communications and can improve the reliability of RRC message transmission in a dual-connection system. The method includes: a first base station sends a first request message to a second base station, where the first request message is used to request to acquire the RRC function entity parameter of the second base station, wherein the RRC function entity parameter of the second base station Used to characterize the processing capability and transmission performance of the second base station for RRC messages; the first base station receives the first response message sent by the second base station; the first base station is based on the RRC function of the first base station The entity parameter and the RRC function entity parameter of the second base station determine the RRC anchor base station of the UE, and the RRC anchor base station of the UE is used to exchange RRC messages with the UE; if the RRC anchor of the UE If the point base station is the second base station, the first base station sends a first indication message to the second base station.

Description

Method and device for transmitting radio resource control message

technical field

The present invention relates to the field of communications, and in particular, to a method and device for transmitting radio resource control messages.

Background technique

In the fourth-generation mobile communication LTE (Long Term Evolution, Long Term Evolution) system, in order to improve the system throughput, the Dual Connectivity (DC) technology is introduced to support the RRC (Radio Resource Control, Radio Resource Control) connection state. A user equipment (user equipment, UE) simultaneously uses the radio resources provided by the two base stations.

As shown in FIG. 1 , in the dual-connectivity system, the UE maintains connection with the primary serving base station MeNB and the secondary serving base station SeNB at the same time. The MeNB is responsible for providing the S1-MME interface and the mobility anchor function to the core network equipment MME (Mobility Management Entity), and the SeNB is responsible for providing additional radio resources to the UE. Both the MeNB and the SeNB are capable of independently managing radio resources in the UE and their respective cells. The resource coordination between the MeNB and the SeNB is realized via message transfer on the X2 interface. The dashed line in Fig. 1 represents signaling, and the solid line represents user plane data.

In the LTE system, the RRC functions mainly include broadcasting, paging, RRC connection management, radio bearer (RadioBearer, RB) control, mobility management, UE measurement control, and the like. Through the transmission of downlink RRC messages, the UE can receive system broadcast and paging messages, establish RBs on the signaling plane and user plane, and complete the configuration of public radio resources and dedicated radio resources. Through the transmission of uplink RRC messages, the UE can report measurement reports. , uplink NAS information, downlink RRC message reception response information, etc. are reported to the base station, and then a data transmission service is established. Therefore, reliable transmission of RRC messages is the premise of establishing data services, and determines the data service performance of the system.

As shown in Figure 2, in the existing dual connectivity system, all the RRC signaling messages and functions required by the UE are managed by the MeNB. The MeNB has an RRC functional entity that is equivalent to the UE, and the SeNB does not have an equivalent RRC function to the UE. RRC functional entity. The SeNB transmits the relevant radio resource configuration information to the MeNB through the X2 interface, and the MeNB is responsible for generating the downlink RRC message and sending it to the UE. The UE only sees one RRC functional entity from the MeNB, and only sends uplink RRC messages to the MeNB. If the quality of the air interface radio link between the MeNB and the UE is deteriorated or the RRC processing resources of the MeNB are insufficient, it may cause the failure of the RRC message transmission or the increase of the transmission delay, the transmission performance will be degraded, and the data transmission service will be affected.

SUMMARY OF THE INVENTION

The present application provides a radio resource control message transmission method and device, which can improve the reliability of RRC message transmission in a dual-connectivity system.

To achieve the above object, the application adopts the following technical solutions:

In a first aspect, the present application provides a method for transmitting a radio resource control message, which may include:

The first base station sends a first request message to the second base station, where the first request message is used to request to obtain the RRC function entity parameter of the second base station, wherein the RRC function entity parameter of the second base station is used to represent all the parameters of the RRC function entity of the second base station. the processing capability and transmission performance of the second base station for the RRC message; the first base station receives the first response message sent by the second base station, and the first response message carries the RRC function entity parameters of the second base station ; The first base station determines the RRC anchor base station of the UE according to the RRC function entity parameter of the first base station and the RRC function entity parameter of the second base station, wherein the RRC function entity parameter of the first base station It is used to characterize the processing capability and transmission performance of the first base station for RRC messages, and the RRC anchor base station of the UE is used to exchange RRC messages with the UE; if the RRC anchor base station of the UE is the RRC anchor base station of the UE the second base station, the first base station sends a first indication message to the second base station, where the first indication message is used to indicate that the second base station is determined as the RRC anchor base station of the UE.

In a second aspect, the present application provides a method for transmitting a radio resource control message, which may include:

The second base station receives a first request message sent by the first base station, where the first request message is used to request to obtain the RRC function entity parameter of the second base station, wherein the RRC function entity parameter of the second base station is used to represent The processing capability and transmission performance of the second base station for RRC messages; the second base station sends a first response message to the first base station, and the first response message carries the RRC function entity parameters of the second base station ; the second base station receives a first indication message sent by the first base station, where the first indication message is used to indicate that the second base station is determined as the RRC anchor base station of the UE.

In a third aspect, the present application provides a method for transmitting a radio resource control message, the method may include:

The UE receives a second indication message sent by the first base station, where the second indication message includes the identifier of the RRC anchor base station of the UE; the UE sends the uplink RRC of the UE to the RRC anchor base station of the UE information.

In a fourth aspect, the present application provides a base station, the base station comprising:

A sending module, configured to send a first request message to the second base station, where the first request message is used to request to obtain the RRC function entity parameters of the second base station, wherein the RRC function entity parameters of the second base station It is used to characterize the processing capability and transmission performance of the second base station for the RRC message; the receiving module is used to receive the first response message sent by the second base station, where the first response message carries the information of the second base station. RRC functional entity parameter; a determining module configured to determine the RRC anchor base station of the UE according to the RRC functional entity parameter of the base station and the RRC functional entity parameter of the second base station received by the receiving module, wherein the base station's RRC functional entity parameter The RRC functional entity parameter is used to characterize the processing capability and transmission performance of the base station for RRC messages, and the RRC anchor base station of the UE is used for the interaction of the RRC message with the UE; the sending module is also used to If the RRC anchor base station of the UE is the second base station, send a first indication message to the second base station, where the first indication message is used to indicate that the second base station is determined as the RRC anchor of the UE Click on the base station.

In a fifth aspect, the present application provides a base station, the base station comprising:

A receiving module, configured to receive a first request message sent by the first base station, where the first request message is used to request to acquire the RRC function entity parameter of the base station, wherein the RRC function entity parameter of the base station is used to represent the processing capability and transmission performance of the base station for the RRC message; a sending module, configured to send a first response message to the first base station, where the first response message carries the RRC functional entity parameters of the base station; the receiving The module is further configured to receive a first indication message sent by the first base station, where the first indication message is used to indicate that the base station is determined as the RRC anchor base station of the UE.

In a sixth aspect, the present application provides a user equipment UE, the UE comprising:

a receiving module, configured to receive a second indication message sent by the first base station, where the second indication message includes an identifier of the RRC anchor base station of the UE; a sending module, configured to send a message to the RRC anchor point of the UE The base station sends the uplink RRC message of the UE.

In a seventh aspect, the present application provides a communication system, the communication system includes the base station described in any one of the fourth aspect and its various optional implementation manners, the fifth aspect and its various optional implementation manners The base station described in any one and the user equipment described in any one of the sixth aspect and various optional implementation manners thereof.

In the method, device, and system for transmitting radio resource control messages provided by the present application, both the first base station and the second base station are configured with RRC functional entities, which can be used to exchange RRC messages with the UE. The first base station acquires the RRC function entity parameters of the second base station, and determines the RRC anchor base station of the UE according to the RRC function entity parameters of the first base station and the second base station. The subsequent UE may perform RRC message interaction with the RRC anchor base station. Different from the method in the prior art, in which the UE can only exchange RRC messages with the first base station, the radio resource control message transmission method provided by the present application, the UE is in the RRC connection state, and the RRC anchor base station of the UE in the dual-connection system is carried out. RRC message interaction. Since the RRC anchor base station of the UE is determined by the first base station according to the RRC functional entity parameters of the first base station and the second base station, the transmission of the RRC message interaction between the RRC anchor base station of the UE and the UE is reliable compared to the non-anchor base station. Sex is higher. Therefore, the radio resource control message transmission method provided by the embodiment of the present invention improves the reliability of RRC message transmission in the dual connectivity system.

Description of drawings

Fig. 1 is a schematic diagram 1 of a dual-connection system frame in the prior art;

Fig. 2 is a schematic diagram 2 of a dual-connection system frame in the prior art;

3 is a schematic diagram of a dual-connection system framework provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram 1 of a method for transmitting a radio resource control message according to an embodiment of the present invention;

FIG. 4-1 is a schematic diagram 2 of a method for transmitting a radio resource control message according to an embodiment of the present invention;

5 is a schematic flowchart of a method for transmitting a radio resource control message according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram 1 of a base station according to an embodiment of the present invention;

FIG. 7 is a second schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram 1 of another base station according to an embodiment of the present invention;

FIG. 9 is a second schematic structural diagram of another base station according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a base station according to an embodiment of the present invention;

FIG. 11 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.

Detailed ways

The method, device, and system for transmitting a radio resource control message provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Terms such as "101", "102", "103", "104" in this document are only used to distinguish different steps, not to describe a specific order of steps.

The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases.

The terms "first" and "second" in the description and the drawings of the present invention are used to distinguish different objects or different processing of the same object, rather than to describe a specific order of the objects.

Furthermore, references to the terms "comprising" and "having" and any variations thereof in the description of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes other unlisted steps or units, or optionally also Include other steps or units inherent to these processes, methods, products or devices.

It should be noted that, in the embodiments of the present invention, words such as "exemplary" or "for example" are used to represent examples, illustrations, or descriptions. Any embodiments or designs described as "exemplary" or "such as" in the embodiments of the present invention should not be construed as preferred or advantageous over other embodiments or designs. Rather, use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

In the description of the present invention, unless otherwise specified, the meaning of "plurality" means two or more.

The radio resource control message transmission method provided in the embodiment of the present invention may be applied to the dual-connection system shown in FIG. 3 , where the dual-connection system may be a fourth generation (4th generation, 4G) (eg, an evolved packet system (evolved packet system). , EPS) mobile communication network, may also be a fifth generation (5th generation, 5G) mobile communication network, or may be other actual mobile communication networks, which are not limited in the present invention.

FIG. 3 shows a schematic diagram of a dual-connection system, and the dual-connection system may include: a UE, a first base station, a second base station, and an MME. The UE in FIG. 3 can be used to connect to the access network equipment deployed by the operator through a wireless air interface. For example, the UE can access the first base station and the second base station in FIG. 3. In the RRC connection state, the UE simultaneously communicates with the first base station and the second base station in FIG. The base station and the second base station remain connected; the first base station and the second base station are mainly used to implement functions such as wireless physical layer functions, resource scheduling and radio resource management, radio access control and mobility management, and the first base station is responsible for providing S1-MME interface, and provides the mobility anchor function to the core network equipment MME. The second base station is responsible for providing additional radio resources to the UE. Both the first base station and the second base station can independently manage the radio resources in the UE and their respective cells. The resource coordination between a base station and a second base station is realized through message transmission on the X2 interface; as a logical network element of the core network in the LTE network, the MME is the key control node of the LTE access network and is responsible for the signaling processing part. The dotted line in FIG. 3 represents signaling, and the solid line represents user plane data. It should be noted that FIG. 3 is only an exemplary architecture diagram. In addition to the functional units shown in FIG. 3 , the network architecture may further include other functional units, which are not limited in this embodiment of the present invention.

The above-mentioned user equipment can be user equipment (user equipment, UE), such as: a mobile phone, a computer, and can also be a cellular phone, a cordless phone, a session initiation protocol (session initiation protocol, SIP) phone, a smart phone, a wireless local loop (wireless local loop) local loop (WLL) station, personal digital assistant (PDA), laptop computer, handheld communication device, handheld computing device, satellite wireless device, wireless modem card, TV set top box (STB), Customer premise equipment (CPE) and/or other equipment used to communicate over the wireless system.

The above-mentioned first base station and second base station may be an eNB or an eNodeB (evolutional NodeB) in LTE, a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario, or a 5G network. It can also be a wearable device or a vehicle-mounted device, etc.

In order to solve the problem in the prior art, all the RRC signaling messages and functions required by the UE are managed by the primary serving base station. When it is insufficient, it may cause the problem that the performance of RRC message transmission is degraded. An embodiment of the present invention provides a radio resource control message transmission method, which is applied to the dual-connectivity system shown in FIG. 3 . The UE is in the RRC connection state and performs RRC message interaction with the RRC anchor base station in the dual-connectivity system. Compared with the non-anchor base station, the transmission reliability of the RRC message interaction between the UE's RRC anchor base station and the UE is higher, which can improve the reliability of RRC message transmission in the dual-connectivity system. As shown in Figure 4, the method may include S401-S407:

S401. The UE accesses the dual connectivity system.

Exemplarily, as shown in FIG. 3 , the dual connection system includes a first base station and a second base station. The RRC connection of the UE is connected to the first base station, the UE is in the RRC connection state, the first base station is the primary serving base station of the dual-connectivity system, and the second base station is the secondary serving base station. The UE maintains connection with both the first base station and the second base station, and the user plane data of the UE may be transmitted by the first base station, or may be transmitted by the second base station, or jointly transmitted by the first base station and the second base station. Both the first base station and the second base station are configured with an RRC functional entity that is equivalent to the UE, that is, both the first base station and the second base station are capable of performing RRC message interaction with the UE. The RRC functional entity is used to implement the RRC layer protocol functions of the base station. Exemplarily, in the LTE system, the RRC layer protocol functions mainly include broadcast, paging, RRC connection management, radio bearer control, mobility management, UE measurement control, etc.

S402, the first base station and the second base station count the RRC function entity parameters respectively.

Specifically, the RRC function entity parameter of a base station is used to characterize the processing capability and transmission performance of the base station for RRC messages. Exemplarily, the RRC functional entity parameters may include RRC processing resource occupancy rate, radio transmission resource occupancy rate, and transmission link quality.

The RRC processing resources refer to the processing resources allocated by the base station to the RRC functional entity, such as hardware resources such as the control chip of the base station, the baseband protocol processing chip, and the memory chip. Exemplarily, the RRC processing resource occupancy rate is the ratio of the hardware resources occupied by the established RRC connections in the base station to the hardware resources allocated by the base station for the RRC functional entity; when the number of RRC connections established by the base station is large, the RRC processing resource occupancy rate If it is higher, problems such as RRC message congestion and increased RRC message processing delay may occur.

Radio transmission resources refer to air interface resources used for RRC message interaction in the base station, such as physical resource blocks (physical resource blocks, PRBs). Exemplarily, the radio transmission resource occupancy rate is the PRB resource occupancy rate, that is, the ratio of the PRB resources occupied by the established RRC connection in the base station to the PRB resources allocated by the base station for the RRC functional entity; if the radio transmission resource occupancy rate is too high, If the wireless transmission resources of the base station are insufficient, the transmission of the RRC message may fail.

The transmission link quality refers to the quality of the air interface radio link between the base station and the UE. Exemplarily, parameters such as reference signal received power (Reference Signal Received Power, RSRP), reference signal received quality (Reference Signal Received Quality, RSRQ), and/or block error rate (Block Error Rate, BLER) can be used to characterize the transmission link quality. . The larger the RSRP and/or RSRQ value, the smaller the BLER value, the higher the transmission link quality, and the higher the reliability of RRC message transmission.

Exemplarily, the first base station and the second base station may count the RRC function entity parameters of the base station according to the first preset period and every first preset period. The manner in which the first base station and the second base station count the parameters of the RRC functional entity and the duration of the first preset period do not affect the implementation effect of the embodiment of the present invention, which is not limited in the embodiment of the present invention.

S403: The first base station determines the RRC anchor base station of the UE according to the RRC function entity parameter of the first base station and the RRC function entity parameter of the second base station.

Optionally, the first base station determines the RRC anchor base station of the UE every second preset period according to the second preset period. The RRC anchor base station of the UE is used for the exchange of RRC messages between the base station and the UE. When a downlink RRC message needs to be sent to the UE, the RRC anchor base station of the UE sends the downlink RRC message to the UE. When there is an uplink RRC message to be sent to the base station, the UE sends the uplink RRC message to the RRC anchor base station of the UE.

As shown in Figure 4-1, the method for the first base station to determine the RRC anchor base station of the UE according to the RRC function entity parameters of the first base station and the RRC function entity parameters of the second base station may include S4031-S4034:

S4031. The first base station sends a first request message to the second base station.

Specifically, the first request message is used to request to obtain the RRC function entity parameter of the second base station; wherein, the RRC function entity parameter of the second base station is used to represent the processing capability and transmission performance of the second base station for the RRC message.

Optionally, the first request message may carry information elements such as the identity of the first base station, the identity of the second base station, and the parameter type of the RRC function entity requested to be obtained. The first request message may reuse an existing X2 interface message, such as a RESOURCE STATUSREQUEST message, or may define a new X2 interface message, which is not limited in this embodiment of the present invention.

S4032. The second base station sends a first response message to the first base station.

The first response message carries the parameters of the RRC function entity of the second base station.

Optionally, the first response message may carry information elements such as the identifier of the second base station, the identifier of the first base station, and the parameter value of the RRC function entity of the second base station. The first response message may reuse an existing X2 interface message, such as a RESOURCE STATUSUPDATE message, or may define a new X2 interface message, which is not limited in this embodiment of the present invention.

S4033: The first base station determines the RRC anchor base station of the UE according to the RRC function entity parameter of the first base station and the RRC function entity parameter of the second base station.

Specifically, the first base station counts its own RRC functional entity parameters, obtains the RRC functional entity parameters of the second base station from the first response message, and determines the RRC functional entity parameters of the first base station and the RRC functional entity parameters of the second base station. The RRC anchor base station of the UE.

Optionally, the RRC functional entity parameters include RRC processing resource occupancy rate, wireless transmission resource occupancy rate, and transmission link quality; the method for determining the RRC anchor base station of the UE is specifically:

Calculate the RRC performance factor P of the first base station and the second base station respectively according to P=α*H+β*R+γ*Q, where α, β, γ are weight coefficients, α+β+γ=1, and H is RRC processing resource occupancy rate, R is the wireless transmission resource occupancy rate, Q is the transmission link quality;

The RRC performance factor P of the first base station and the second base station is compared, and the base station with a larger RRC performance factor P value is determined as the RRC anchor base station of the UE.

Further, if the RRC anchor base station of the UE determined by the first base station is the second base station, the embodiment of the present invention may further include S4034:

S4034: The first base station sends a first indication message to the second base station.

The first indication message is used to indicate that the second base station is determined as the RRC anchor base station of the UE.

The first indication message may be an existing RRC message, a field is added to the existing RRC message, or it may be a newly added RRC message; this is not limited in the embodiment of the present invention.

S404. The first base station sends a second indication message to the UE.

Specifically, after determining the RRC anchor base station of the UE, the first base station sends a second indication message to the UE, where the second indication message includes the identifier of the RRC anchor base station of the UE. After receiving the second indication message, the UE may determine to perform RRC message interaction with the first base station or the second base station according to the identity of the RRC anchor base station of the UE.

Exemplarily, the second indication message may be an existing RRC message, and a field is added to the existing RRC message to carry the identifier of the RRC anchor base station; it may also be a newly added RRC message to indicate the UE's The RRC anchor base station carries the identifier of the RRC anchor base station, which is not limited in the embodiment of the present invention.

It should be noted that the order in which the first base station sends the first indication message to the second base station and the first base station sends the second indication message to the UE has no effect on the implementation effect of the embodiment of the present invention, which is not limited in the embodiment of the present invention .

S405, the RRC anchor base station of the UE acquires the RRC configuration information of the non-RRC anchor base station.

Specifically, if the RRC anchor base station of the UE is the first base station, the first base station sends a second request message to the second base station for requesting to acquire the RRC configuration information of the second base station. After receiving the second request message, the second base station sends a second response message to the first base station, where the second response message carries the RRC configuration information of the second base station.

If the RRC anchor base station of the UE is the second base station, the second base station sends a third request message to the first base station for requesting to acquire the RRC configuration information of the first base station. After receiving the third request message, the first base station sends a third response message to the second base station, where the third response message carries the RRC configuration information of the first base station. The third request message and the second request message may be the same message, but in different sending directions, the second request message is sent by the first base station to the second base station, and the third request message is sent by the second base station to the first base station. The third response message and the second response message may be the same message, but in different sending directions. The second response message is sent by the second base station to the first base station, and the third response message is sent by the first base station to the second base station.

Exemplarily, the second request message and the third request message may be existing RRC messages, and fields such as the first base station identifier, the second base station identifier, and the requested RRC configuration information type are added to the existing RRC message; or A new RRC message is added to request to obtain the RRC configuration information of the message receiver; this is not limited in the embodiment of the present invention. The second response message and the third response message can be existing RRC messages, and fields such as the second base station identifier, the first base station identifier, and RRC configuration information are added to the existing RRC message; Carrying RRC configuration information; this is not limited in this embodiment of the present invention.

The RRC configuration information of the base station refers to public control information and dedicated control information allocated by the base station to the UE, such as MIB/SIB information, paging information, public radio resource configuration information, and dedicated radio resource configuration information.

It should be noted that the RRC configuration information of the base station is carried when the RRC anchor base station of the UE sends the downlink RRC message to the UE. Optionally, the RRC anchor base station of the UE can obtain the non-RRC information before sending the downlink RRC message. RRC configuration information of the anchor base station. The timing at which the RRC anchor base station of the UE acquires the RRC configuration information of the non-RRC anchor base station does not affect the implementation effect of the embodiment of the present invention, which is not limited in the embodiment of the present invention.

S406 , the RRC anchor base station of the UE sends a downlink RRC message to the UE, and the downlink RRC message carries the RRC configuration information of the first base station and the second base station.

Optionally, when sending the downlink RRC message to the UE, the RRC anchor base station of the UE carries the RRC configuration information of the base station and the acquired RRC configuration information of the non-RRC anchor base station in the downlink RRC message together, and is sent via the air interface ( Uu port) to the UE.

S407: When the UE sends the uplink RRC message to the RRC anchor base station of the UE, the uplink RRC message carries the RRC configuration information of the UE.

Optionally, when the UE needs to send an uplink RRC message to the base station, it determines to send the uplink RRC message to the first base station or the second base station according to the identifier of the RRC anchor base station of the UE carried in the second indication message sent by the first base station. . The RRC configuration information of the UE carried in the uplink RRC message may be the measurement report reported by the UE to the base station, the uplink NAS information, or the reception response information of the downlink RRC message, and the like.

It should be noted that the uplink RRC message sent by the UE may be a response message corresponding to the downlink RRC message sent by the RRC anchor base station of the UE, or may be an uplink RRC message actively initiated by the UE. This embodiment of the present invention does not limit this.

The radio resource control message transmission method provided by the embodiment of the present invention. In a dual connectivity system, both the first base station and the second base station are configured with RRC functional entities, which can be used to exchange RRC messages with the UE. The first base station acquires the RRC function entity parameters of the second base station, and determines the RRC anchor base station of the UE according to the RRC function entity parameters of the first base station and the second base station. The subsequent UE may perform RRC message interaction with the RRC anchor base station. Different from the method in the prior art, in which the UE can only perform RRC message interaction with the first base station, the radio resource control message transmission method provided by the embodiment of the present invention, the UE is in the RRC connection state, and the RRC anchor point of the UE in the dual-connection system is connected. The base station exchanges RRC messages. Since the RRC anchor base station of the UE is determined by the first base station according to the RRC functional entity parameters of the first base station and the second base station, the transmission of the RRC message interaction between the RRC anchor base station of the UE and the UE is reliable compared to the non-anchor base station. Sex is higher. Therefore, the radio resource control message transmission method provided by the embodiment of the present invention improves the reliability of RRC message transmission in the dual connectivity system.

An embodiment of the present invention provides a method for transmitting a radio resource control message. Taking the second base station being determined as an anchor base station as an example, an example is given for a message interaction process of different devices in a dual-connection system. As shown in Figure 5, the method may include S501-S511:

S501. The UE accesses the dual connectivity system.

Exemplarily, this embodiment is applied to the dual connection system shown in FIG. 3 . The UE maintains connection with the first base station and the second base station at the same time. The first base station is a primary serving base station, the second base station is a secondary serving base station, and both the first base station and the second base station are configured with an RRC functional entity that is equivalent to the UE.

S502, the first base station and the second base station count the RRC function entity parameters respectively.

Specifically, the first base station and the second base station count the RRC function entity parameters of the base station according to the first preset period and every first preset period, and the RRC function entity parameters include the RRC processing resource occupancy rate and the wireless transmission resource occupancy rate. rate and transmission link quality.

S503. The first base station sends a first request message to the second base station.

Optionally, the first base station sends a first request message to the second base station every second preset period according to the second preset period, so as to determine the RRC anchor base station of the UE. Exemplarily, in FIG. 5 , a process in which the first base station determines the RRC anchor base station of the UE is taken as an example.

Specifically, the first base station sends a first request message to the second base station, requesting to acquire the parameters of the RRC function entity of the second base station.

S504. The second base station sends a first response message to the first base station.

Specifically, the second base station sends a first response message to the first base station, which carries the parameter value of the RRC function entity of the second base station.

S505: The first base station determines the RRC anchor base station of the UE according to the RRC function entity parameter of the first base station and the RRC function entity parameter of the second base station.

Optionally, in this embodiment of the present invention, the first base station determines the second base station as an RRC anchor base station of the UE as an example.

S506. The first base station sends a first indication message to the second base station.

Specifically, the first base station sends a first indication message to the second base station, indicating that the second base station is determined as the RRC anchor base station of the UE.

S507. The first base station sends a second indication message to the UE.

Specifically, the second indication message includes the identifier of the RRC anchor base station of the UE, that is, the identifier of the second base station.

S508. The second base station sends a third request message to the first base station.

Specifically, the second base station sends a third request message to the first base station, requesting to acquire the RRC configuration information of the first base station. Exemplarily, after receiving the first indication information, the second base station sends a third request message to the first base station.

S509. The first base station sends a third response message to the second base station.

Specifically, the first base station sends a third response message to the second base station, which carries the RRC configuration information of the first base station.

S510. The second base station sends a downlink RRC message to the UE.

Specifically, the downlink RRC message sent by the second base station to the UE carries the RRC configuration information of the first base station and the second base station.

S511. The UE sends an uplink RRC message to the second base station.

Exemplarily, after receiving the downlink RRC message sent by the second base station, the UE sends an uplink RRC message to the second base station, where the uplink RRC message is a response message to the downlink RRC message. Specifically, the UE determines that the second base station is the RRC anchor base station of the UE according to the identifier of the RRC anchor base station of the UE contained in the second indication message received in S507, and sends an uplink RRC message to the second base station.

It should be noted that, the sequence numbers of the steps in this embodiment of the present invention, such as S506 and S507, are only used to distinguish a certain step, and do not indicate a specific sequence of the steps. The flowchart of this embodiment is only used to illustrate the message sending direction, and the sequence of sending each message is not limited.

The radio resource control message transmission method provided by the embodiment of the present invention. In a dual connectivity system, both the first base station and the second base station are configured with RRC functional entities, which can be used to exchange RRC messages with the UE. The first base station acquires the RRC function entity parameters of the second base station, and determines the RRC anchor base station of the UE according to the RRC function entity parameters of the first base station and the second base station. The subsequent UE may perform RRC message interaction with the RRC anchor base station. Different from the method in the prior art in which the UE can only perform RRC message interaction with the first base station, in the radio resource control message transmission method provided by the embodiment of the present invention, when the UE is in the RRC connection state, the UE can perform RRC message interaction with the second base station . When the RRC resources of the first base station are insufficient or the quality of the air interface radio link between the first base station and the UE deteriorates, the second base station and the UE exchange RRC messages, which reduces the probability of failure of RRC message transmission and improves the dual-connectivity system. Reliability of RRC message transmission in .

The foregoing mainly introduces the solutions provided by the embodiments of the present invention. It can be understood that, in order to implement the above functions, the base station and the UE include corresponding hardware structures and/or software modules for performing each function. Those skilled in the art should easily realize that the present invention can be implemented in hardware or a combination of hardware and computer software in conjunction with the base station and user equipment and algorithm steps of each example described in the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

In this embodiment of the present invention, the base station and the user equipment may be divided into functional modules or functional units according to the foregoing method examples. For example, each functional module or functional unit may be divided corresponding to each function, or two or more functions may be integrated in in a processing module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules or functional units. Wherein, the division of modules or units in the embodiments of the present invention is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

An embodiment of the present invention provides a base station. In the case where each functional module is divided according to each function, FIG. 6 shows a possible schematic structural diagram of the base station involved in the above embodiment. The base station includes a sending module 601 , a receiving module 602 , and a determining module 603 .

The sending module 601 is configured to send a first request message to the second base station, where the first request message is used to request to acquire the RRC function entity parameters of the second base station, wherein the second base station The RRC function entity parameter is used to characterize the processing capability and transmission performance of the second base station for RRC messages; it is also used to send the second base station to the second base station if the RRC anchor base station of the UE is the second base station A first indication message, where the first indication message is used to indicate that the second base station is determined as the RRC anchor base station of the UE.

The receiving module 602 is configured to receive a first response message sent by the second base station, where the first response message carries an RRC function entity parameter of the second base station.

The determining module 603 is configured to determine the RRC anchor base station of the UE according to the RRC functional entity parameter of the base station and the RRC functional entity parameter of the second base station received by the receiving module 602, wherein the RRC of the base station is The functional entity parameter is used to represent the processing capability and transmission performance of the base station for the RRC message, and the RRC anchor base station of the UE is used for the interaction of the RRC message with the UE.

The RRC functional entity parameters of the base station include: RRC processing resource occupancy rate, wireless transmission resource occupancy rate and transmission link quality.

Optionally, the determining module 603 is specifically configured to calculate the RRC performance factor P of the base station and the second base station respectively according to P=α*H+β*R+γ*Q, where α, β, γ is the weight coefficient, α+β+γ=1, H is the RRC processing resource occupancy rate, R is the wireless transmission resource occupancy rate, Q is the transmission link quality; the base station with a larger RRC performance factor P value is determined as the The RRC anchor base station of the UE.

Optionally, as shown in FIG. 7 , the base station further includes a statistics module 604, configured to count the RRC function entity parameters of the base station every first preset period according to the first preset period.

Optionally, the sending module 601 is further configured to, in the determining module, determine the RRC anchor point of the UE according to the RRC functional entity parameter of the base station and the RRC functional entity parameter of the second base station received by the receiving module. After that, the base station sends a second indication message to the UE, where the second indication message includes the identifier of the RRC anchor base station of the UE.

Optionally, the sending module 601 is further configured to, if the RRC anchor base station of the UE is the base station, send a second request message to the second base station, where the second request message is used to request acquisition RRC configuration information of the second base station;

The receiving module 602 is further configured to receive a second response message sent by the second base station, where the second response message carries the RRC configuration information of the second base station.

Optionally, the sending module 601 is further configured to send the first request message to the second base station every second preset period according to a second preset period.

Optionally, the sending module 601 is further configured to, if the determining module 603 determines that the base station is the RRC anchor base station of the UE, send the downlink RRC message to the UE including the base station and the RRC base station. the RRC configuration information of the second base station.

An embodiment of the present invention provides a base station. In the case where each functional module is divided according to each function, FIG. 8 shows a possible schematic structural diagram of the base station involved in the above embodiment. The base station includes a receiving module 801 and a sending module 802 .

The receiving module 801 is configured to receive a first request message sent by the first base station, where the first request message is used to request to acquire the RRC function entity parameters of the base station, wherein the RRC function of the base station The entity parameter is used to characterize the processing capability and transmission performance of the base station for the RRC message.

The sending module 802 is configured to send a first response message to the first base station, where the first response message carries the RRC function entity parameter of the base station.

The receiving module 801 is further configured to receive a first indication message sent by the first base station, where the first indication message is used to indicate that the base station is determined as the RRC anchor base station of the UE.

Optionally, with reference to FIG. 8 , as shown in FIG. 9 , the base station further includes a statistics module 803 configured to count the RRC function entity parameters of the base station every first preset period according to a first preset period.

Optionally, the sending module 802 is further configured to send a third request message to the first base station after the receiving module 801 receives the first indication message sent by the first base station, the third request message The message is used to request to obtain the RRC configuration information of the first base station;

The receiving module 801 is further configured to receive a third response message sent by the first base station, where the third response message carries the RRC configuration information of the first base station.

Optionally, the sending module 802 is further configured to: if the receiving module 801 receives the first indication message sent by the first base station, the downlink RRC message sent to the UE includes the first base station and the RRC configuration information of the base station.

Optionally, the RRC functional entity parameters of the base station include: RRC processing resource occupancy rate, wireless transmission resource occupancy rate, and transmission link quality.

In the case of using an integrated unit, FIG. 10 shows a possible schematic structural diagram of the base station involved in the above embodiment. The base station includes: a processing unit 1002 and a communication unit 1003 . The processing unit 1002 is used to control and manage the actions of the base station, for example, to perform the steps performed by the above determination module 603, the statistics module 604 or the steps performed by the statistics module 803, and/or other processes for performing the techniques described herein . The communication unit 1003 is used for supporting communication between the base station and other network entities, for example, performing the steps performed by the above-mentioned sending module 601 and the receiving module 602 or the steps performed by the above-mentioned receiving module 801 and the sending module 802 . The base station may further include a storage unit 1001 and a bus 1004, where the storage unit 1001 is used to store program codes and data of the base station.

The above-mentioned processing unit 1002 may be a processor or controller in a base station, and the processor or controller may implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of the present invention. The processor or controller may be a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It may implement or execute the various exemplary logical blocks, modules and circuits described in connection with this disclosure. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and the like.

The communication unit 1003 may be a transceiver, a transceiver circuit, a communication interface, or the like in the base station.

The storage unit 1001 may be a memory in the base station, etc., the memory may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as read-only memory, flash memory, hard disk or solid-state disk ; The memory may also include a combination of the above-mentioned types of memory.

The bus 1004 may be an Extended Industry Standard Architecture (EISA) bus or the like. The bus 1004 can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is used in FIG. 10, but it does not mean that there is only one bus or one type of bus.

An embodiment of the present invention further provides a computer-readable storage medium, where one or more programs are stored in the computer-readable storage medium, and the one or more programs include instructions. When the processor of the base station executes the instructions, the base station executes the instructions. The steps performed by the base station in the method flow shown in the above method embodiments.

An embodiment of the present invention provides a user equipment. In the case where each function module is divided according to each function, FIG. 11 shows a possible schematic structural diagram of the user equipment involved in the above embodiment. The user equipment includes a receiving module 1101 and a sending module 1102 .

The receiving module 1101 is configured to receive a second indication message sent by the first base station, where the second indication message includes the identifier of the RRC anchor base station of the UE.

The sending module 1102 is configured to send the uplink RRC message of the UE to the RRC anchor base station of the UE.

An embodiment of the present invention provides a communication system, and the communication system may include a first base station, a second base station, and user equipment, so as to execute the radio resource control message transmission method provided by the embodiment of the present invention. For the description of the first base station, the second base station, and the user equipment, reference may be made to the relevant descriptions in the foregoing method embodiments and apparatus embodiments, and details are not repeated here.

The steps of the method or algorithm described in conjunction with the disclosure of the present invention may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in RAM, flash memory, ROM, erasable programmable read-only memory (easable programmable ROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disk, removable hard disk, compact disk read only (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium. Of course, the storage medium can also be an integral part of the processor. The processor and storage medium may reside in an ASIC.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. For the specific working process of the system, apparatus and unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another system, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented in the form of a software functional unit and sold or used as an independent product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: flash memory, removable hard disk, read-only memory, random access memory, magnetic disk or optical disk and other media that can store program codes.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (24)

1. A method for transmitting a radio resource control message, wherein a User Equipment (UE) is simultaneously connected with a first base station and a second base station, the method comprising:

101. the first base station sends a first request message to the second base station, wherein the first request message is used for requesting to acquire RRC functional entity parameters of the second base station, and the RRC functional entity parameters of the second base station are used for representing the processing capability and the transmission performance of the second base station for RRC messages;

102. the first base station receives a first response message sent by the second base station, wherein the first response message carries RRC function entity parameters of the second base station;

103. the first base station determines an RRC anchor base station of the UE according to the RRC functional entity parameters of the first base station and the RRC functional entity parameters of the second base station, wherein the RRC functional entity parameters of the first base station are used for representing the processing capability and the transmission performance of the first base station on RRC messages, and the RRC anchor base station of the UE is used for carrying out RRC message interaction with the UE;

104. if the RRC anchor base station of the UE is the second base station, the first base station sends a first indication message to the second base station, wherein the first indication message is used for indicating that the second base station is determined to be the RRC anchor base station of the UE;

the RRC functional entity parameters comprise: RRC processing resource occupancy rate, wireless transmission resource occupancy rate and transmission link quality;

the determining, by the first base station, the RRC anchor base station of the UE according to the RRC functional entity parameter of the first base station and the RRC functional entity parameter of the second base station specifically includes:

respectively calculating RRC performance factors P of the first base station and the second base station according to P ═ α × H + β × R + γ × Q, wherein α, β, and γ are weight coefficients, H is an RRC processing resource occupancy rate, R is a wireless transmission resource occupancy rate, and Q is transmission link quality;

and determining the base station with the larger RRC performance factor P value as the RRC anchor base station of the UE.

2. The method of claim 1, further comprising:

and the first base station counts RRC functional entity parameters of the first base station every other first preset period according to a first preset period.

3. The method of any one of claims 1-2, wherein after the first base station determines the RRC anchor base station of the UE according to the RRC functional entity parameters of the first base station and the RRC functional entity parameters of the second base station, the method further comprises:

and the first base station sends a second indication message to the UE, wherein the second indication message comprises the identification of the RRC anchor point base station of the UE.

4. The method according to any one of claims 1-2, further comprising:

if the RRC anchor point base station of the UE is the first base station, the first base station sends a second request message to the second base station, and the second request message is used for requesting to acquire RRC configuration information of the second base station;

and the first base station receives a second response message sent by the second base station, wherein the second response message carries the RRC configuration information of the second base station.

5. The method according to any one of claims 1-2, further comprising:

and the first base station executes the 101-104 operation at intervals of a second preset period according to a second preset period.

6. The method of any one of claims 1-2, wherein if the RRC anchor base station of the UE is the first base station, the method further comprises:

and the downlink RRC message of the UE is sent to the UE by the first base station, and the downlink RRC message of the UE comprises RRC configuration information of the first base station and the second base station.

7. A method for transmitting a radio resource control message, wherein a User Equipment (UE) is simultaneously connected with a first base station and a second base station, the method comprising:

the second base station receives a first request message sent by the first base station, wherein the first request message is used for requesting to acquire an RRC functional entity parameter of the second base station, and the RRC functional entity parameter of the second base station is used for representing the processing capability and the transmission performance of the second base station for the RRC message;

the second base station sends a first response message to the first base station, wherein the first response message carries RRC function entity parameters of the second base station;

the second base station receives a first indication message sent by the first base station, wherein the first indication message is used for indicating that the second base station is determined to be an RRC anchor base station of the UE.

8. The method of claim 7, further comprising:

and the second base station counts the RRC functional entity parameters of the second base station at intervals of a first preset period according to the first preset period.

9. The method of claim 7, wherein after the second base station receives the first indication message sent by the first base station, the method further comprises:

the second base station sends a third request message to the first base station, wherein the third request message is used for requesting to acquire RRC configuration information of the first base station;

and the second base station receives a third response message sent by the first base station, wherein the third response message carries the RRC configuration information of the first base station.

10. The method according to any of claims 7-9, wherein if the second base station receives the first indication message sent by the first base station, the method further comprises:

and the downlink RRC message of the UE is sent to the UE by the second base station, and the downlink RRC message of the UE comprises RRC configuration information of the first base station and the second base station.

11. The method according to any of claims 7-9, wherein the RRC-functional entity parameters comprise: RRC processing resource occupancy rate, wireless transmission resource occupancy rate and transmission link quality.

12. The method of claim 1 or 7, wherein the UE maintains a connection with the first base station and the second base station simultaneously, and wherein the method comprises:

the UE receives a second indication message sent by the first base station, wherein the second indication message comprises an identifier of an RRC anchor point base station of the UE;

and the UE sends the uplink RRC message of the UE to an RRC anchor point base station of the UE.

13. A base station with which a user equipment UE is simultaneously connected to a second base station, comprising:

a sending module, configured to send a first request message to the second base station, where the first request message is used to request to acquire an RRC functional entity parameter of the second base station, and the RRC functional entity parameter of the second base station is used to characterize a processing capability and a transmission performance of the second base station for an RRC message;

a receiving module, configured to receive a first response message sent by the second base station, where the first response message carries an RRC function entity parameter of the second base station;

a determining module, configured to determine an RRC anchor base station of the UE according to the RRC functional entity parameter of the base station and the RRC functional entity parameter of the second base station received by the receiving module, where the RRC functional entity parameter of the base station is used to characterize a processing capability and a transmission performance of the base station for an RRC message, and the RRC anchor base station of the UE is used to perform RRC message interaction with the UE;

the sending module is further configured to send a first indication message to the second base station if the RRC anchor base station of the UE is the second base station, where the first indication message is used to indicate that the second base station is determined to be the RRC anchor base station of the UE;

the RRC functional entity parameters of the base station comprise: RRC processing resource occupancy rate, wireless transmission resource occupancy rate and transmission link quality;

the determining module determines the RRC anchor base station of the UE according to the RRC functional entity parameter of the base station and the RRC functional entity parameter of the second base station received by the receiving module, and specifically includes:

respectively calculating RRC performance factors P of the base station and the second base station according to P ═ α × H + β × R + γ × Q, wherein α, β, and γ are weight coefficients, H is an RRC processing resource occupancy rate, R is a wireless transmission resource occupancy rate, and Q is transmission link quality;

and determining the base station with the larger RRC performance factor P value as the RRC anchor base station of the UE.

14. The base station of claim 13, wherein the base station further comprises a counting module, configured to count the RRC function entity parameter of the base station every other first preset period according to a first preset period.

15. The base station of any of claims 13-14, wherein the sending module is further configured to:

after the determining module determines the RRC anchor base station of the UE according to the RRC functional entity parameters of the base station and the RRC functional entity parameters of the second base station received by the receiving module,

and sending a second indication message to the UE, wherein the second indication message comprises the identification of the RRC anchor point base station of the UE.

16. The base station according to any of claims 13-14, characterized by:

the sending module is further configured to send a second request message to the second base station if the RRC anchor base station of the UE is the base station, where the second request message is used to request to acquire RRC configuration information of the second base station;

the receiving module is further configured to receive a second response message sent by the second base station, where the second response message carries RRC configuration information of the second base station.

17. The base station according to any of claims 13-14, characterized by:

the sending module is further configured to send the first request message to the second base station every second preset period according to a second preset period.

18. The base station according to any of claims 13-14, characterized by:

the sending module is further configured to send, to the UE, a downlink RRC message including RRC configuration information of the base station and the second base station if the determining module determines that the base station is an RRC anchor base station of the UE.

19. A base station, wherein a user equipment UE maintains a connection with a first base station and the base station simultaneously, comprising:

a receiving module, configured to receive a first request message sent by the first base station, where the first request message is used to request to acquire an RRC functional entity parameter of the base station, and the RRC functional entity parameter of the base station is used to characterize a processing capability and a transmission performance of the base station for an RRC message;

a sending module, configured to send a first response message to the first base station, where the first response message carries an RRC functional entity parameter of the base station;

the receiving module is further configured to receive a first indication message sent by the first base station, where the first indication message is used to indicate that the base station is determined to be an RRC anchor base station of the UE.

20. The base station of claim 19, further comprising:

and the counting module is used for counting the RRC function entity parameters of the base station at intervals of a first preset period according to the first preset period.

21. The base station of claim 19, wherein:

the sending module is further configured to send a third request message to the first base station after the receiving module receives the first indication message sent by the first base station, where the third request message is used to request to acquire RRC configuration information of the first base station;

the receiving module is further configured to receive a third response message sent by the first base station, where the third response message carries RRC configuration information of the first base station.

22. The base station according to any of claims 19-21, characterized by:

the sending module is further configured to, if the receiving module receives the first indication message sent by the first base station, send a downlink RRC message to the UE, where the downlink RRC message includes the first base station and RRC configuration information of the base station.

23. The base station according to any of claims 19-21, wherein the RRC functional entity parameters of the base station comprise: RRC processing resource occupancy rate, wireless transmission resource occupancy rate and transmission link quality.

24. The base station of claim 13 or 19, wherein the UE maintains a connection with both the first base station and the second base station, comprising:

a receiving module, configured to receive a second indication message sent by the first base station, where the second indication message includes an identifier of an RRC anchor base station of the UE;

a sending module, configured to send an uplink RRC message of the UE to an RRC anchor base station of the UE.

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