CN101778481B - Method and device for accessing primary network - Google Patents

Abstract

The embodiment of the invention discloses a method and device for initial network access. The method for initial network access provided by the embodiment of the present invention includes: receiving information from a terminal on a downlink carrier that the terminal is monitoring; and sending a message to the terminal on the downlink carrier. Through the embodiments of the present invention, the resource waste problem in the initial network access process in the existing LTE-Advanced system can be solved.

Description

Method and device for initial network access

technical field

The present invention relates to the field of communication technology, in particular to a method and device for initial network access.

Background technique

LTE-Advanced (Long Term Evolution Advanced) is a further enhancement of LTE technology to continue to maintain the absolute competitive advantage of 3GPP (3rd Generation Partnership Project) in the future 4G standard. The current LTE-Advanced system requires that an LTE UE (User Equipment, user equipment) can normally run on the LTE-Advanced system; meanwhile, the LTE-Advanced UE also needs to be able to run on the LTE system.

In addition, in order to meet the requirements of IMT-Advanced (International Mobile Telecommunication Advanced, a further enhancement of the International Mobile Communication System), the 3GPP LTE-Advanced system has now agreed to introduce carrier aggregation technology to expand the system bandwidth to support a peak data rate of up to 1Gbps . Among them, the main idea of carrier aggregation is to aggregate multiple component carriers into a carrier higher than 20M to support higher data rates. For example, the downlink bandwidth can be aggregated by five 20M carriers.

In any wireless communication system, the UE's initial network access process is a very critical process. In the LTE-Advanced system, the UE's initial network access process is mainly implemented through the following steps:

1) The UE performs cell search and finds a temporary component carrier;

2) The UE receives a BCH (Broadcast Channel, broadcast channel) from the temporary component carrier, and obtains system information and PRACH (Physical Random Access Channel, physical random access channel) resource information, etc. from the BCH;

3) The UE sends a preamble (preamble) on the selected PRACH resource and receives a random access response message at the same time;

4) The UE sends a scheduled uplink transmission message to the eNodeB (base station), which contains UE capability information;

5) The UE receives the contention resolution message fed back by the eNodeB, and the contention resolution message includes information about a new uplink and downlink carrier pair allocated to the UE by the eNodeB according to the capability information;

6) The UE moves to the newly allocated uplink and downlink carrier pair, and reports to the eNodeB.

In the process of implementing the present invention, the inventor finds that there are at least the following problems in the prior art:

The UE has certain randomness when performing cell search. The UE selects a temporary component carrier and sends an uplink message according to the PRACH resource on the temporary component carrier; however, the eNodeB does not know which component the UE has selected at this time. carrier, in order for the UE to safely receive the message sent by the eNodeB, the eNodeB needs to simultaneously send the same downlink message on multiple component carriers. In this way, downlink radio resources are wasted because the same message is repeatedly sent on multiple component carriers.

Contents of the invention

Embodiments of the present invention provide a method and device for initial network access to solve the resource waste problem in the initial network access process in the existing LTE-Advanced system.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

A method of initial network access, comprising:

receiving information from a terminal on a downlink carrier that the terminal is monitoring;

sending a message to the terminal on the downlink carrier.

A terminal device comprising:

A sending module, configured to send a message to the base station, where the message includes information about the downlink carrier that the terminal device is monitoring;

A receiving module, configured to receive a message sent by the base station through the downlink carrier.

A base station, comprising:

A receiving module, configured to receive a message from the terminal, where the message includes information about the downlink carrier that the terminal is monitoring;

A sending module, configured to send a message to the terminal on the downlink carrier.

The method and device for initial network access provided by the embodiments of the present invention designate the downlink carrier for the base station or inform the base station of the downlink carrier currently monitored by the terminal, so that the base station does not need to be on multiple component carriers when sending downlink messages. Sending the same message at the same time; thereby avoiding the situation that the base station needs to repeatedly send the same message to multiple component carriers, and reducing the waste of downlink wireless resources.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 is a flowchart of a method for initial network access provided by Embodiment 1 of the present invention;

FIG. 2 is a schematic structural diagram of a terminal device provided in Embodiment 1 of the present invention;

FIG. 3 is a flowchart of a method for initial network access provided by Embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a base station provided by Embodiment 2 of the present invention;

FIG. 5 is a flowchart of a method for initial network access provided by Embodiment 3 of the present invention;

FIG. 6 is a flowchart of a method for initial network access provided by Embodiment 4 of the present invention;

FIG. 7 is a flowchart of a method for initial network access provided in Embodiment 5 of the present invention;

FIG. 8 is a schematic structural diagram of a terminal device provided in Embodiment 5 of the present invention;

FIG. 9 is a flowchart of a method for initial network access provided by Embodiment 6 of the present invention;

FIG. 10 is a schematic structural diagram of a base station provided in Embodiment 6 of the present invention;

FIG. 11 is a flowchart of a method for initial network access provided by Embodiment 7 of the present invention;

FIG. 12 is a first schematic structural diagram of a terminal device provided in Embodiment 8 of the present invention;

FIG. 13 is a second schematic structural diagram of a terminal device provided in Embodiment 8 of the present invention;

FIG. 14 is a third schematic structural diagram of a terminal device provided in Embodiment 8 of the present invention;

FIG. 15 is a first schematic structural diagram of a base station provided by Embodiment 8 of the present invention;

FIG. 16 is a second schematic structural diagram of a base station provided in Embodiment 8 of the present invention;

FIG. 17 is a third structural schematic diagram of a base station provided in Embodiment 8 of the present invention;

FIG. 18 is a schematic structural diagram of a terminal device provided in Embodiment 9 of the present invention;

FIG. 19 is a schematic structural diagram of a base station provided by Embodiment 9 of the present invention;

FIG. 20 is a schematic structural diagram of a network system provided by Embodiment 10 of the present invention;

FIG. 21 is a schematic structural diagram of a network system provided by Embodiment 11 of the present invention.

Detailed ways

In order to solve the resource waste problem in the initial network access process in the existing LTE-Advanced system, the embodiments of the present invention provide a method, device and system for initial network access. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one:

The concept of the main carrier in the LTE-Advanced system refers to: one of the component carriers obtained through the carrier aggregation technology is the main carrier, and the main carrier can control other component carriers. Based on the concept of the primary carrier, an embodiment of the present invention provides a method for initial network access, as shown in FIG. 1 , which may specifically include:

11. Obtain the indication information of the access carrier specified by the base station from the searched component carriers;

Wherein, the access carrier may be a main carrier or other component carriers, and the base station may dynamically determine the access carrier and notify the terminal in a system message; here, dynamically determining the access carrier may specifically be periodic Update the access carrier periodically, or adjust the access carrier according to the current load of each carrier. In the embodiment of the present invention, preferably, the primary carrier is selected as the access carrier.

12. Migrate from the searched component carrier to the access carrier corresponding to the indication information;

13. Receive a random access response message delivered by the base station from the access carrier corresponding to the indication information.

In order to better implement the above initial network access method, an embodiment of the present invention also provides a terminal device, as shown in FIG. 2 , including: an acquisition module 21, a migration module 22, and a first receiving module 23; wherein,

The obtaining module 21 is used to obtain the indication information of the access carrier specified by the base station in the searched component carrier; the migration module 22 is used to migrate from the searched component carrier to the access carrier corresponding to the indication information; A receiving module 23, configured to receive a random access response message sent by the base station from the access carrier corresponding to the indication information.

The method and device for initial network access provided by the embodiments of the present invention obtain the indication information of the access carrier specified by the base station from the system message broadcast by the base station, so that the terminal can form a carrier from the current carrier according to the indication information of the access carrier Jumping to the access carrier, and fixedly receiving the random access response message sent by the base station from the access carrier, thereby avoiding the situation that the base station needs to repeatedly send the same message to multiple component carriers, and reducing downlink wireless traffic. Waste of resources.

Embodiment two:

As shown in Figure 3, the method for initial network access provided by the embodiment of the present invention specifically includes the following steps:

31. Send a message to the terminal, where the message includes indication information of the access carrier specified by the base station;

32. After receiving the random access preamble from the terminal, send a random access response message to the terminal on the access carrier.

The execution subject of this embodiment may be a base station.

In the method of the embodiment of the present invention, the order of each step can be adjusted according to actual needs.

In order to better implement the above method for initial network access, an embodiment of the present invention also provides a base station, as shown in FIG. 4 , including: a first sending module 41 and a second sending module 42; wherein,

The first sending module 41 is configured to send a message to the terminal, and the message includes the indication information of the access carrier designated by the base station; the second sending module 42 is configured to, after receiving the random access preamble from the terminal, Sending a random access response message to the terminal on the access carrier.

The method and device for initial network access provided by the embodiments of the present invention designate the access carrier as the downlink carrier for the base station to send messages, and write the indication information of the access carrier into the system message to notify the terminal side, thereby Avoid the situation that the base station needs to repeatedly send the same message on multiple component carriers, and reduce the waste of downlink wireless resources.

Embodiment three:

In order to prevent the base station from repeatedly sending the same message on multiple component carriers, the system can set a fixed component carrier as the downlink carrier when the UE initially accesses, and the fixed component carrier can be called an "access carrier". In the embodiment of the present invention, preferably, the main carrier among the multiple component carriers is used as the access carrier; of course, the selection of the access carrier is not limited to the main carrier, and may also be other carriers than the main carrier.

The indication information of the access carrier is set in the system information message sent by each component carrier, preferably, the access carrier indication information may be the frequency offset between the component carrier currently monitored by the UE and the access carrier , can also be the number of the access carrier; if the component carrier currently monitored by the UE is the access carrier, the field of the access carrier indication information carried in the system information on the access carrier can be set to empty or 0. When the UE performs cell search, it directly jumps to the access carrier to receive the system information sent on the access carrier according to the access carrier indication information contained in the system information of the currently searched component carrier, and then continues the initial access process.

For the PRACH resources of the system, in particular, the LTE-Advanced eNodeB can divide all PRACH resources into two parts, and broadcast different PRACH resource configuration information on the access carrier and other carriers, that is, according to the LTE UEs that the system may support and Depending on the number of LTE-Advanced UEs, the entire PRACH resource is divided into two parts, and the amount of resources in each part is softly adjusted according to the number of users of LTE UE and LTE-A UE. In the embodiment of the present invention, the PRACH resource available to the LTE-Advanced UE is only broadcast on the access carrier.

As shown in Figure 5, the method for initial network access provided by the embodiment of the present invention includes:

51. The UE performs an initial cell search, and when the UE searches for a certain component carrier, it receives a BCH from the searched component carrier to acquire system information.

52. The UE judges whether the eNodeB belongs to the LTE system or the LTE-Advanced system through the system message on the component carrier.

If there is no access carrier indication information in the system information on the component carrier, the current eNodeB belongs to the LTE system, and at this time, the UE directly reads the system information and PRACH resource information on the component carrier, and performs the initial access process of LTE ; If there is access carrier indication information in the system message on the component carrier, the current eNodeB belongs to the LTE-Advanced system, then go to step 53.

53. The UE determines the location of the access carrier according to the access carrier indication information in the system message, and migrates to the access carrier.

54. The UE reads BCH information from the access carrier, and acquires system information and PRACH resource information on the access carrier.

55. The UE selects a PRACH resource from the PRACH resources on the access carrier, and sends the Preamble to the eNodeB on the PRACH resource.

56. After receiving the Preamble sent by the UE, the eNodeB sends a RACHResponse (random access response) message to the UE on the access carrier.

57. The UE sends a scheduled uplink transmission message to the eNodeB, and the message includes the capability information of the UE.

58. After receiving the scheduled uplink transmission message, the eNodeB allocates a new uplink and downlink carrier pair for the UE according to the capability information, and sends a contention resolution message to the UE on the access carrier.

59. The UE reads the information of the newly allocated uplink and downlink carrier pair from the contention resolution message, migrates to the newly allocated uplink and downlink carrier pair, and reports to the eNodeB.

In the above process, in addition to carrying the information of the uplink and downlink carrier pairs allocated for the terminal by sending a contention resolution message to the terminal, it is also possible to send an RRC (Radio Resource Control, radio resource control) connection establishment message to the terminal. Carry the information of the uplink and downlink carrier pairs allocated for the terminal.

In the above step 56, when the eNodeB sends the RACH response message to the UE, in order to balance the load of the uplink carrier, the eNodeB can designate for the UE other uplink carriers other than the uplink carrier that sends the preamble; at this time, the eNodeB needs to specify in the RACH Response message The indication information of the uplink carrier is added to inform the UE which uplink component carrier should be used. After receiving the RACH response message, the UE sends the scheduled uplink transmission message and subsequent signaling and service data to the eNodeB on the uplink carrier specified in the message.

In the method of the embodiment of the present invention, the order of each step can be adjusted according to actual needs. In the initial network access method provided by the embodiment of the present invention, the access carrier indication information is written in the system information, so that the UE can jump from the current component carrier to the access carrier according to the access carrier indication information, and from the The access carrier obtains PRACH resources and sends the corresponding Preamble to the eNodeB, and designates the access carrier as the downlink carrier for the base station to send messages; thus avoiding the situation where the base station needs to repeatedly send the same message to multiple component carriers, reducing downlink wireless resources. waste.

Embodiment four:

In the embodiment of the present invention, preferably, the main carrier among the multiple component carriers is used as the access carrier; of course, the selection of the access carrier is not limited to the main carrier, and may also be other carriers than the main carrier.

As shown in Figure 6, the method for initial network access provided by the embodiment of the present invention specifically includes the following steps:

61. The UE performs an initial cell search, and when the UE searches for a certain component carrier, it receives the BCH from the searched component carrier to acquire system information.

62. The UE judges whether the eNodeB belongs to the LTE system or the LTE-Advanced system through the system message on the component carrier.

If there is no access carrier indication information in the system information on the component carrier, the current eNodeB belongs to the LTE system, and at this time, the UE directly reads the system information and PRACH resource information on the component carrier, and performs the initial access process of LTE ; If there is access carrier indication information in the system message on the component carrier, the current eNodeB belongs to the LTE-Advanced system, then go to step 63.

63. The UE determines the location of the access carrier according to the access carrier indication information in the system message, and migrates to the access carrier.

64. The UE reads BCH information from the access carrier, and acquires system information and PRACH resource information on the access carrier.

65. The UE selects a PRACH resource from the PRACH resources on the access carrier, and sends the Preamble to the eNodeB on the PRACH resource.

66. After receiving the Preamble sent by the UE, the eNodeB sends a RACHResponse message on the access carrier, which carries information for indicating a new uplink and downlink carrier pair;

If the eNodeB needs to specify a new uplink and downlink carrier pair for the UE, the eNodeB adds information indicating the new uplink and downlink carrier pair to the RACH response message to notify the UE, so that the UE uses the new uplink and downlink carrier pair to perform subsequent operations; If the eNodeB does not need to specify a new pair of uplink and downlink carriers for the UE, the eNodeB may not add information indicating the new uplink and downlink carrier pairs in the RACH response message, or it may be used to indicate the new uplink and downlink carrier pairs The field corresponding to the information is set to empty or 0.

67. The UE sends a scheduled uplink transmission message to the eNodeB on the newly designated uplink carrier.

Since the eNodeB has allocated a new pair of uplink and downlink carriers to the UE, the UE sends the scheduled uplink transmission message on the newly designated uplink component carrier.

68. The eNodeB feeds back a contention resolution message to the UE from the newly designated downlink component carrier.

69. The UE reports to the eNodeB.

In the above process, in addition to carrying the information of the uplink and downlink carrier pairs allocated for the terminal by sending a contention resolution message to the terminal, the uplink and downlink carrier pairs allocated for the terminal can also be carried by sending an RRC connection establishment message to the terminal. Line carrier pair information.

In the method of the embodiment of the present invention, the order of each step can be adjusted according to actual needs. In the initial network access method provided by the embodiment of the present invention, by adding information about a new uplink and downlink carrier pair in the RACH response message, the terminal and the base station have fixed uplink and downlink carrier pairs during the communication process, thereby avoiding the need for the base station to communicate with multiple In the case where multiple carriers repeatedly send the same message, the waste of downlink radio resources is reduced.

Embodiment five:

As shown in Figure 7, the method for initial network access provided by the embodiment of the present invention includes the following steps:

71. Send the information of the downlink carrier that the scheduled terminal is monitoring to the base station;

72. Receive a message delivered by the base station through the downlink carrier.

In order to better implement the above initial network access method, an embodiment of the present invention also provides a terminal device, as shown in FIG. 8 , including: a sending module 81 and a receiving module 82; wherein,

The sending module 81 is configured to send a message to the base station, and the message includes the information of the downlink carrier that the terminal is monitoring; the receiving module 82 is configured to receive the message sent by the base station through the downlink carrier.

The method and device for initial network access provided by the embodiments of the present invention add the information of the downlink carrier that the terminal is currently monitoring to the scheduled uplink transmission message reported by the UE to the eNodeB, so that the eNodeB knows which component carrier is used to transmit the downlink to the UE. Sending a message, so as to avoid the situation that the base station needs to repeatedly send the same message to multiple component carriers, and reduce the waste of downlink wireless resources.

Embodiment six:

As shown in Figure 9, the method for initial network access provided by the embodiment of the present invention includes the following steps:

91. Receive information from the terminal on the downlink carrier that the terminal is monitoring;

92. Send a message to the terminal on the downlink carrier.

In order to better implement the above initial network access method, an embodiment of the present invention also provides a base station, as shown in FIG. 10 , including: a receiving module 101 and a sending module 102; wherein,

The receiving module 101 is configured to receive a message from the terminal, and the message includes the information of the downlink carrier that the terminal is monitoring; the sending module 102 is configured to send a message to the terminal on the downlink carrier.

The method and device for initial network access provided by the embodiments of the present invention report to the base station the information of the downlink carrier that the terminal is currently monitoring, so that the base station knows which component carrier is used to send the message to the terminal, thereby avoiding the need for the base station to send messages to multiple In the case where multiple carriers repeatedly send the same message, the waste of downlink radio resources is reduced.

Embodiment seven:

As shown in Figure 11, the method for initial network access provided by the embodiment of the present invention includes the following steps:

111. The UE performs initial cell search and finds a temporary component carrier.

112. The UE receives the BCH from the temporary component carrier to acquire system information and PRACH resource information.

113. The UE sends a random access Preamble on the selected PRACH resource.

114. After receiving the Preamble sent by the UE, the eNodeB sends the RACH Response message fed back by the eNodeB on multiple component carriers.

115. The UE sends a scheduled uplink transmission message on the selected PRACH resource, and the message includes the information of the downlink component carrier that the UE is currently monitoring (it may be the number of the component carrier), and of course it may also include the capability information of the UE.

116. If the scheduled uplink transmission message contains UE capability information, after receiving the scheduled uplink transmission message, the eNodeB allocates a new uplink and downlink carrier pair for the UE according to the capability information, and transmits the information in the scheduled uplink Send a contention resolution message to the UE on the downlink component carrier indicated by the UE that is currently monitoring.

117. The UE reads the information of the newly allocated uplink and downlink carrier pair from the contention resolution message, migrates to the newly allocated uplink and downlink carrier pair, and reports to the eNodeB.

In the above process, in addition to carrying the information of the uplink and downlink carrier pairs allocated for the UE by sending a contention resolution message to the UE, the eNodeB can also carry the information of the uplink and downlink carrier pairs allocated for the UE by sending an RRC connection establishment message to the UE. Information about the uplink and downlink carrier pairs.

In the method of the embodiment of the present invention, the order of each step can be adjusted according to actual needs.

In the method for initial network access provided by the embodiment of the present invention, the information of the downlink carrier that the current terminal is monitoring is added to the scheduled uplink transmission message reported by the UE to the eNodeB, so that the eNodeB knows which component carrier is used to send the message to the UE, Therefore, the situation that the base station needs to repeatedly send the same message to multiple component carriers is avoided, and the waste of downlink radio resources is reduced.

Embodiment eight:

As shown in FIG. 12, the terminal device for initial network access provided by the embodiment of the present invention includes: an acquisition module 120, a migration module 121, and a first receiving module 122; wherein,

The obtaining module 120 obtains the indication information of the access carrier specified by the base station from the searched component carriers, the relocation module 121 causes the UE to migrate from the searched component carrier to the access carrier corresponding to the indication information, and then the first receiving Module 122 receives a random access response message delivered by the base station from the access carrier corresponding to the indication information.

As shown in Figure 13, the terminal device provided by the embodiment of the present invention further includes:

The judging module 123 is used to judge whether the base station is a base station of the LTE-Advanced system according to whether the searched component carrier contains the indication information of the access carrier; When the base station migrates from the searched component carrier to the access carrier corresponding to the indication information.

Further, the terminal device provided by the embodiment of the present invention further includes:

A selection module 124, configured to select a physical random access resource from the physical random access resources broadcast on the access carrier;

The first sending module 125 is configured to send a random access preamble to the base station on the selected physical random access resource;

The second sending module 126 is configured to send a scheduled uplink transmission message to the base station on the selected physical random access resource, which includes capability information of the terminal;

The second receiving module 127 is configured to receive, on the access carrier, a contention resolution message or an RRC connection establishment message sent by the base station, which includes information about an uplink and downlink carrier pair allocated to the terminal by the base station according to the capability information.

As shown in FIG. 14, if the random access response message received by the first receiving module 122 includes a message specifying an uplink carrier, the terminal device further includes:

The third sending module 128 is configured to send a scheduled uplink transmission message to the base station on a designated uplink carrier, which includes capability information of the terminal;

The third receiving module 129 is configured to receive, from the access carrier, a contention resolution message or an RRC connection establishment message sent by the base station, which includes an uplink and downlink carrier allocated for the terminal by the base station according to the capability information of the terminal right information.

In addition to the above situation, the random access response message received by the first receiving module 122 may also include the message of the designated uplink and downlink carrier pairs.

Compared with the above-mentioned terminal equipment, the embodiment of the present invention also provides a base station for initial network access, as shown in FIG. 15 , including: a first sending module 151 and a second sending module 152; wherein,

The first sending module 151 broadcasts a system message to the terminal, and the system message includes the indication information of the access carrier designated by the base station; after the second sending module 152 receives the random access preamble sent by the terminal, Sending a random access response message to the terminal on the carrier.

Wherein, the first sending module 151 is further configured to broadcast physical random access resource information available to LTE-Advanced terminals on the access carrier.

As shown in Figure 16, the base station provided by the embodiment of the present invention further includes:

The first receiving module 153 is configured to receive a scheduled uplink transmission message sent by the terminal on the physical random access resource selected by the terminal, which includes capability information of the terminal;

The third sending module 154 is configured to send a contention resolution message or an RRC connection establishment message to the terminal on the access carrier, which includes information about the uplink and downlink carrier pairs allocated to the terminal by the base station according to the capability information.

As shown in FIG. 17, if the random access response message sent by the second sending module 152 includes information about the specified uplink carrier, the base station further includes:

The second receiving module 155 is configured to receive, on a designated uplink carrier, a scheduled uplink transmission message sent by the terminal, which includes capability information of the terminal;

The fourth sending module 156 is configured to send a contention resolution message or an RRC connection establishment message to the terminal on the access carrier, which includes information about the uplink and downlink carrier pairs allocated for the terminal by the base station according to the capability information.

In addition to the above situation, the random access response message sent by the second sending module 152 may also include information of the designated uplink and downlink carrier pairs.

Each unit in the embodiment of the present invention can be integrated into one body, or can be deployed separately. The above units can be combined into one unit, and can also be further divided into multiple sub-units.

The device for initial network access provided by the embodiment of the present invention writes the access carrier indication information in the system message, so that the UE can jump from the current component carrier to the access carrier according to the access carrier indication information, and from the The access carrier obtains PRACH resources and sends the corresponding Preamble to the eNodeB, and designates the access carrier as the downlink carrier for the base station to send messages; thus avoiding the situation where the base station needs to repeatedly send the same message to multiple component carriers, reducing downlink wireless resources. waste.

Embodiment nine:

As shown in FIG. 18, the terminal device for initial network access provided by the embodiment of the present invention includes: a sending module 181 and a receiving module 182; wherein,

The sending module 181 is configured to send a message to the base station, and the message includes the information of the downlink carrier that the terminal is monitoring; the receiving module 182 is configured to receive the message sent by the base station through the downlink carrier.

Wherein, the sending module 181 carries the information of the downlink carrier that the terminal is monitoring by sending the scheduled uplink transmission message to the base station, and of course, other messages may also be used to carry the information of the downlink carrier that the terminal is monitoring; The uplink transmission message or other messages may also include terminal capability information, then the contention resolution message or RRC connection establishment message received by the receiving module 182 includes information about the uplink and downlink carrier pairs allocated for the terminal according to the capability information.

Compared with the above-mentioned terminal equipment, the embodiment of the present invention also provides a base station for initial network access, as shown in FIG. 19 , including: a receiving module 191 and a sending module 192; wherein,

The receiving module 191 is configured to receive a message from the terminal, and the message includes information about the downlink carrier that the terminal is monitoring; the sending module 192 is configured to send a message to the terminal on the downlink carrier that the terminal is monitoring .

Wherein, the receiving module 191 receives the scheduled uplink transmission message sent by the terminal device, which includes the information of the downlink carrier that the terminal is monitoring; if the scheduled uplink transmission message also includes the capability information of the terminal, then The contention resolution message or the RRC connection establishment message sent by the sending module 192 includes information about the uplink and downlink carrier pairs allocated for the terminal according to the capability information.

Each unit in the embodiment of the present invention can be integrated into one body, or can be deployed separately. The above units can be combined into one unit, and can also be further divided into multiple sub-units.

The device for initial network access provided by the embodiment of the present invention adds the information of the downlink carrier that the terminal is currently monitoring to the scheduled uplink transmission message reported by the UE to the eNodeB, so that the eNodeB knows which component carrier is used to send the message to the UE, Therefore, the situation that the base station needs to repeatedly send the same message to multiple component carriers is avoided, and the waste of downlink radio resources is reduced.

Embodiment ten:

As shown in FIG. 20, the network system provided by the embodiment of the present invention includes: a terminal device 201 and a base station 202; wherein,

The terminal device 201 is configured to obtain indication information of an access carrier specified by the base station 202 from the searched component carriers, migrate from the searched component carrier to the access carrier corresponding to the indication information, and transfer from the searched component carrier to the access carrier corresponding to the indication information receiving the random access response message sent by the base station 202 on the access carrier corresponding to the indication information;

The base station 202 is configured to send the instruction information of the access carrier designated by the base station 202 to the terminal device 201; and, after receiving the random access preamble sent by the terminal 201, send to the terminal 201 on the access carrier Random access response message.

Each unit of the system in the embodiment of the present invention may be integrated in one device, or distributed in multiple devices. The above units can be combined into one unit, and can also be further divided into multiple sub-units.

In the network system provided by the embodiment of the present invention, the access carrier indication information is written in the system information, so that the UE can jump from the current component carrier to the access carrier according to the access carrier indication information, and the access carrier Obtain the PRACH resources and send the corresponding Preamble to the eNodeB, and designate the access carrier as the downlink carrier for the base station to send messages; thus avoiding the situation where the base station needs to repeatedly send the same message to multiple component carriers and reduce the waste of downlink wireless resources.

Embodiment eleven:

As shown in FIG. 21, the network system provided by the embodiment of the present invention includes: a terminal device 211 and a base station 212; wherein,

The terminal device 211 is configured to send information about the downlink carrier that the terminal device is monitoring to the base station 212; then, receive a message sent by the base station 212 through the downlink carrier;

The base station 212 is configured to receive the information sent by the terminal device 211 on the downlink carrier that the terminal device is monitoring, and send a message to the terminal device 211 on the downlink carrier.

Each unit of the system in the embodiment of the present invention may be integrated in one device, or distributed in multiple devices. The above units can be combined into one unit, and can also be further divided into multiple sub-units.

In the network system provided by the embodiments of the present invention, by adding information about the downlink carrier that the terminal is currently listening to in the scheduled uplink transmission message reported by the terminal to the base station, the base station can know which component carrier is used to send the message to the terminal, thereby avoiding the need for the base station to In the case of repeatedly sending the same message to multiple component carriers, the waste of downlink radio resources is reduced.

The method, device, and system for initial network access provided by the embodiments of the present invention enable the base station to designate or allocate the downlink carrier on which the base station sends a message to the terminal, or notify the base station of the downlink carrier that the terminal is currently monitoring. The base station can send a signal to the terminal on a specific downlink carrier, which solves the problem in the prior art that the base station needs to repeatedly send the same message to multiple component carriers, resulting in waste of downlink wireless resources.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. All should be covered 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 (10)

1. A method for initial network access is characterized in that the method is applied to an LTE-Advanced system, when a terminal initially accesses the network, a base station distributes uplink and downlink carrier wave pairs for the terminal, and the method comprises the following steps:

receiving information of a downlink carrier wave monitored by a terminal from the terminal, wherein the information of the downlink carrier wave is the serial number of the downlink carrier wave;

and sending a message to the terminal on the downlink carrier, wherein the message comprises an uplink and downlink carrier pair allocated to the terminal, so that the terminal is migrated to the uplink and downlink carrier pair.

2. The method of initial network access according to claim 1, wherein the receiving information of the downlink carrier to which the terminal is monitoring from the terminal comprises:

receiving a scheduled uplink transmission message from a terminal, wherein the scheduled uplink transmission message comprises information of a downlink carrier monitored by the terminal.

3. The method of initial network access of claim 1, further comprising: and receiving the capability information of the terminal from the terminal.

4. The method of initial network access according to claim 3, wherein the sending the message to the terminal on the downlink carrier comprises:

sending a contention resolution message to the terminal on the downlink carrier, wherein the contention resolution message includes information of uplink and downlink carrier pairs allocated to the terminal according to the capability information; or,

and sending a radio resource control connection establishment message to the terminal on the downlink carrier, wherein the radio resource control connection establishment message comprises information of uplink and downlink carrier pairs distributed to the terminal according to the capability information.

5. A terminal device is applied to an LTE-Advanced system, and when the terminal device initially accesses a network, the terminal device receives an uplink carrier and a downlink carrier which are distributed by a base station for the terminal device, and the terminal device comprises:

a sending module, configured to send a message to a base station, where the message includes information of a downlink carrier that is being monitored by a terminal device, and the information of the downlink carrier is a serial number of the downlink carrier;

a receiving module, configured to receive a message sent by the base station through the downlink carrier, where the message includes an uplink and downlink carrier pair allocated to the terminal device, so that the terminal device migrates to the uplink and downlink carrier pair.

6. The terminal device of claim 5,

the sending module is further configured to send capability information of the terminal.

7. The terminal device according to claim 6, wherein the message received by the receiving module includes information of uplink and downlink carrier pairs allocated to the terminal according to the capability information.

8. A base station, wherein the base station is applied to an LTE-Advanced system, and when a terminal device initially accesses a network, the base station allocates uplink and downlink carrier pairs to the terminal, and the base station includes:

a receiving module, configured to receive a message from a terminal, where the message includes information of a downlink carrier that is being monitored by the terminal, and the information of the downlink carrier is a serial number of the downlink carrier;

and a sending module, configured to send a message to the terminal on the downlink carrier, where the message includes an uplink and downlink carrier pair allocated to the terminal, so that the terminal can migrate to the uplink and downlink carrier pair.

9. The base station of claim 8,

the receiving module is further configured to receive capability information of the terminal.

10. The base station according to claim 9, wherein the message sent by the sending module to the terminal includes information of uplink and downlink carrier pairs allocated to the terminal according to the capability information.