WO2015035567A1

WO2015035567A1 - Method, apparatus and system for access of terminals to evolved node b system

Info

Publication number: WO2015035567A1
Application number: PCT/CN2013/083300
Authority: WO
Inventors: 朱松; 鲁振伟; 李龠; 郭小龙
Original assignee: 华为技术有限公司
Priority date: 2013-09-11
Filing date: 2013-09-11
Publication date: 2015-03-19
Also published as: CN104662963B; CN104662963A

Abstract

Disclosed in the embodiment of the present invention are a method, apparatus and system for the access of terminals to an evolved Node B system, aiming to improve the access efficiency of the terminals. The method disclosed in the embodiment of the present invention comprises: a source evolved Node B dividing the same type of terminals into a first group of terminals and a second group of terminals; when the result of measuring the same type terminals meets a preset switching condition, sending to a target evolved Node B a switching request that the first group of terminals and the second group of terminals are switched from the source evolved Node B to the target evolved Node B; receiving switching request response information sent by the target evolved Node B, wherein the switching request response information contains information regarding a random access resource allocated to the second group of terminals; sending the information regarding the random access resource to the first group of terminals and the second group of terminals so that the first group of terminals obtain uplink synchronization information and uplink resource allocation information according to the information regarding the random access resource so as to access the target evolved Node B.

Description

Method, device and system for terminal accessing base station system

The present invention relates to the field of communications, and in particular, to a method, an apparatus, and a system for a terminal to access a base station system.

Background technique

In a mobile communication system, user equipment (English: User Equipment, English abbreviation: UE) switching between base stations is an essential mechanism for ensuring continuity of communication services. In some special scenes, such as high-speed moving trains, cars, ships, airplanes, subways, etc., there will be a large number of UEs that are close to each other, switching at the same time or within a short time interval. Happening.

In the prior art, when multiple UEs are switched from a source base station (English: Source evolved Node B, English abbreviation: S-eNB) to a target base station, (English: Target evolved Node B, English abbreviation: T-eNB), each A UE must initiate a random access procedure and switch between them separately.

However, in the foregoing handover process, each UE initiates a random access procedure and performs handover respectively. Therefore, switching multiple UEs separately consumes a large amount of random access resources. Summary of the invention

The embodiments of the present invention provide a method, a device, and a system for a terminal to access a base station system, which are used to improve efficiency when a large number of UEs are simultaneously switched.

A first aspect of the present invention provides a method for a terminal to access a base station system, where the base station system includes a source base station and a target base station, and may include:

The source base station divides the terminals of the same type into the first group of terminals and the second group of terminals; when the measurement result of the terminal of the same type meets the preset switching condition, sending a handover request to the target base station, The handover request is used to request that the first group of terminals and the second group of terminals switch from the source base station to the target base station;

Receiving, by the target base station, handover request response information, where the handover request response information includes information of a random access resource allocated to the second group of terminals;

And transmitting the information about the random access resource that is allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group of terminals according to the random access resource Letter And acquiring uplink synchronization information and uplink resource allocation information to access the target base station. In a first possible implementation, the method further includes: if the target base station receives an access request initiated by the second group of terminals, to the first group of terminals and the second group of terminals Sending a random access response message, where the random access response message includes uplink resource allocation information and uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals acquire the uplink Resource allocation information and uplink synchronization information.

With the first aspect or the first possible implementation of the first aspect, in a second possible implementation, the method further includes: if the target base station receives the access initiated by the second group of terminals And sending, by the request, the random access response message to the first group of terminals and the second group of terminals, where the random access response message includes uplink resource allocation information of the first group of terminals, and uplink of the second group of terminals The resource allocation information and the uplink synchronization information of the second group of terminals, so that the first group of terminals acquires uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals, where the second The group terminal acquires uplink resource allocation information of the second group of terminals and uplink synchronization information of the second group of terminals.

With the second possible implementation of the first aspect, in a third possible implementation, the handover request response information further includes a sounding reference signal resource allocated by the target base station to the first group of terminals. After receiving the handover request response information sent by the target base station, the method further includes: sending, to the first group of terminals, information about the sounding reference signal resources allocated by the target base station to the first group of terminals, where The first group of terminals sends a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.

A second aspect of the present invention provides a method for a terminal to access a base station system, where the base station system includes a source base station and a target base station, and may include:

The first group of terminals receives information about the random access resources allocated by the source base station for the second group of terminals, and the second group of terminals is the same type of terminals as the first group of terminals except the first group. a terminal other than the terminal;

Obtaining a random access response message of the second group of terminals according to the information about the random access resources of the second group of terminals, and acquiring uplink synchronization information of the second group of terminals in the random access response message And uplink resource allocation information; And accessing the target base station according to the uplink synchronization information and an uplink resource.

In a first possible implementation manner, the method further includes: receiving a random access response message sent by the target base station;

Obtaining uplink resource allocation information and time synchronization information of the second group of terminals included in the random access response message, and accessing the target base station according to uplink resource allocation information and time synchronization information of the second group of terminals .

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the method further includes:

Receiving a random access response message sent by the target base station;

Obtaining, by the target base station, the uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals, and the Uplink synchronization information of the second group of terminals, and accessing the target base station according to uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals.

With reference to the second possible implementation manner of the second aspect, in a third possible implementation, the information that the target base station sends the sounding reference signal resource allocated by the target base station to the first group of terminals is received;

Sending a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information and uplink resource allocation information of the first group of terminals according to the received sounding reference signal.

A third aspect of the present invention provides a base station system, which may include:

a source base station and a target base station;

The source base station is configured to divide the terminals of the same type into the first group terminal and the second group terminal;

Sending a handover request to the target base station when the measurement result of the terminal of the same type meets a preset handover condition, where the handover request is used to request the first group terminal and the second group terminal from the The source base station switches to the target base station;

Sending, to the first, the information about the random access resource allocated to the second group of terminals The group of terminals and the second group of terminals enable the first group of terminals to acquire uplink synchronization information and uplink resource allocation information according to the information of the random access resource to access the target base station.

In a first possible implementation, the target base station is configured to send a random connection to the first group of terminals and the second group of terminals if receiving an access request initiated by the second group of terminals In the response message, the random access response message includes the uplink resource allocation information and the uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals acquire the uplink resource allocation information. And uplink synchronization information.

With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner, the target base station is further configured to: if receiving an access request initiated by the second group of terminals, Sending a random access response message to the first group of terminals and the second group of terminals, where the random access response message includes uplink resource allocation information of the first group of terminals and uplink resource allocation of the second group of terminals The information and the uplink synchronization information of the second group of terminals, so that the first group of terminals acquires uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals, and the second group of terminals Obtaining uplink resource allocation information of the second group of terminals and uplink synchronization information of the second group of terminals.

With the second possible implementation of the third aspect, in a third possible implementation, the handover request response information further includes a sounding reference signal resource allocated by the target base station to the first group of terminals. Information

The source base station is further configured to send, to the first group of terminals, information of sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals are in the sounding reference signal. And transmitting, by the resource, the sounding reference signal to the target base station, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.

A fourth aspect of the present invention provides a base station, which may include:

a grouping unit, configured to: the source base station divides the terminal of the same type into the first group terminal and the second group terminal;

a sending unit, configured to send a handover request to the target base station when the measurement result of the terminal of the same type meets a preset handover condition, where the handover request is used to request the first group of terminals and the second The group terminal switches from the source base station to the target base station;

a receiving unit, configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals; The sending unit is further configured to send the information about the random access resource allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group The terminal acquires uplink synchronization information and uplink resource allocation information according to the information of the random access resource to access the target base station.

In a first possible implementation manner, the sending unit is further configured to send, to the first group of terminals, information of a sounding reference signal resource allocated by the target base station to the first group of terminals, where The first group of terminals sends a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.

A fifth aspect of the present invention provides a base station, which may include:

Processor, transmitter and receiver;

The processor is configured to divide, by the source base station, the terminals of the same type into the first group terminal and the second group terminal;

The transmitter is configured to send a handover request to the target base station when the measurement result of the terminal of the same type meets a preset handover condition, where the handover request is used to request the first group of terminals and the The second group of terminals switches from the source base station to the target base station;

The receiver is configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals; And transmitting, to the first group of terminals and the second group of terminals, the information about the random access resources allocated to the second group of terminals, so that the first group of terminals according to the random The information of the access resource acquires uplink synchronization information and uplink resource allocation information to access the target base station.

A sixth aspect of the present invention provides a terminal, which may include:

a receiving information unit, configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals a terminal other than the first group of terminals;

Obtaining an information unit, configured to listen to an access response message of the second group of terminals according to the information about the random access resources of the second group of terminals received by the receiving information unit, and obtain the access response message Uplink synchronization information and uplink resource allocation information of the second group of terminals; The access unit is configured to access the target base station according to the uplink synchronization information and uplink resource allocation information acquired by the acquiring unit information.

In a first possible implementation manner, the receiving information unit is further configured to receive a random access response message sent by the target base station;

The acquiring information unit is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message;

The access unit is further configured to access the target base station according to uplink resource allocation information and uplink synchronization information of the second group of terminals.

With reference to the sixth aspect, or the first possible implementation manner of the sixth aspect, in a second possible implementation, the acquiring information unit is further configured to acquire the target included in the random access response message Uplink resource allocation information of the first group of terminals, uplink resource allocation information of the second group of terminals, and uplink synchronization information of the second group of terminals sent by the base station to the second group of terminals;

The access unit is further configured to access the target base station according to uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals.

With reference to the second possible implementation manner of the sixth aspect, in a third possible implementation, the receiving information unit is further configured to receive, by the source base station, the target base station as the first group of terminals Information of the allocated sounding reference signal resources;

The device further includes: a sending signal unit, configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects the first group according to the received sounding reference signal Uplink synchronization information of the terminal.

A seventh aspect of the present invention provides a terminal, which may include:

Processor, receiver and transmitter;

The receiver is configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals. a terminal other than the first group of terminals;

The processor is configured to: according to the information about the random access resource of the second group of terminals received by the receiving information unit, listen to an access response message of the second group of terminals, and obtain the access response message Uplink synchronization information and uplink resource allocation information of the second group of terminals;

The processor is further configured to: use the uplink synchronization information acquired according to the acquiring unit information, and The uplink resource allocation information is accessed by the target base station.

In a first possible implementation, the receiver is further configured to receive a random access response message sent by the target base station, and receive the target base station sent by the source base station as the first group of terminals. Information of the allocated sounding reference signal resources;

The processor is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message, and obtain the location included in the random access response message. The uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals, and the uplink synchronization information of the second group of terminals sent by the target base station to the second group of terminals;

The processor is further configured to access the target base station according to the uplink resource allocation information and the uplink synchronization information of the second group of terminals, and the uplink resource allocation information according to the first group of terminals and the Uplink synchronization information of the two groups of terminals accesses the target base station;

The transmitter is configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal. .

As can be seen from the foregoing technical solutions, the embodiments of the present invention have the following advantages: The source base station divides the terminals of the same type into the first group terminal and the second group terminal, and the measurement results of the terminals of the same type meet the preset switching conditions. And transmitting, to the target base station, a handover request for accessing the target base station to the target base station, where the handover request response information sent by the target base station received by the source base station only carries the information of the second group of terminal random access resources, and is allocated to the The information about the access resources of the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals obtains the random access response of the second group of terminals according to the random access resource. Obtaining, by listening to the random access response message of the second group of terminals, the same uplink synchronization information and uplink resource allocation information of the second group of terminals, and accessing the target base station according to the information, so that, relative to all When the terminal initiates the handover at the same time, since only the second group of terminals initiates random access on the access channel, the first group of terminals listens to the corresponding Access response message to obtain the access signaling and resources to achieve the target base station with access, handover signaling can be reduced interaction, random access resource saving, while switching the base station to improve the efficiency of the user. DRAWINGS FIG. 1 is a schematic diagram of another embodiment of a method for a terminal to access a base station system according to an embodiment of the present invention; FIG. 2 is a schematic diagram of another embodiment of a method for a terminal to access a base station system according to an embodiment of the present invention; FIG. 4 is a schematic diagram of still another embodiment of a method for a terminal to access a base station system according to an embodiment of the present invention; FIG. 5 is a schematic diagram of a terminal accessing a base station system according to an embodiment of the present invention; FIG. 6 is a schematic diagram of an embodiment of a base station system according to an embodiment of the present invention;

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

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

FIG. 9 is a schematic diagram of an embodiment of a terminal according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of another embodiment of a terminal according to an embodiment of the present invention; FIG.

FIG. 11 is a schematic diagram of still another embodiment of a terminal according to an embodiment of the present invention. detailed description

The embodiments of the present invention provide a method and a device for a terminal to access a base station system, which are used to improve efficiency when a large number of UEs simultaneously switch. The details are described below separately.

Referring to FIG. 1, an embodiment of a method for a terminal to access a base station system according to an embodiment of the present invention includes:

The source base station divides the terminal of the same type into the first group terminal and the second group terminal. The base station system in this embodiment includes a source base station and a target base station, where the source base station is a base station currently accessed by the terminal, and the target base station is The base station that the terminal is ready to access.

The source base station divides the terminals of the same type into a first group of terminals (i.e., unseeded UEs) and a second group of terminals (i.e., seeded UEs). In this embodiment, the terminal of the same type refers to a terminal that is relatively close in position and has the same action, wherein the relatively close position means that the distance between the terminals is less than a preset distance value, and the specific setting of the preset distance value is The actual application is related, for example, according to the distance between the terminal and the base station and the distance comparison between the base stations, and is not limited to the implementation of the solution of the present invention. The same action means that the terminal performs the same behavior, for example, each terminal initiates a handover request.

The source base station can learn which terminals are the same type of terminal by measuring each terminal. Since the second group of terminals has more signaling interactions with the base station system, the source base station can select a group of terminals with strong selection signals or strong terminal capabilities as the second group of terminals, and of course, a group of terminals can be randomly selected. The end serves as the second group of terminals. Preferably, the source base station selects one terminal with the highest signal strength and the strongest terminal processing capability as the second group terminal.

In this embodiment, the source base station sends measurement signaling to the first group of terminals and the second group of terminals according to the current service quality, and receives the returned measurement report, according to the first group of terminals and the first The status of the two groups of terminals determines whether to switch. Further, the second group of terminals is selected from the status of each terminal in the measurement report.

102. When a measurement result of the terminal of the same type meets a preset handover condition, send a handover request to the target base station.

The handover request is for requesting the first group of terminals and the second group of terminals to switch from the source base station to a target base station.

Specifically, after the source base station performs measurement on the first group terminal and the second group terminal, the measurement result shows that the two groups of terminals meet the preset switching condition, and then determines that the first group terminal and the second group terminal switch, Sending a handover request to the target base station, requesting to switch the first group of terminals and the second group of terminals from the source base station to the target base station.

103. Receive handover request response information sent by the target base station.

The handover request response information includes information about a random access resource allocated to the second group of terminals;

Transmitting, by the target base station, the handover request response information to the source base station, and including the random connection allocated by the target base station to the second group of terminals, when the target base station determines that the first group of terminals and the second group of terminals are accessible. Information about resources.

The information about the random access resource allocated to the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals according to the random access resource information And acquiring uplink synchronization information and uplink resource allocation information to access the target base station.

The source base station sends the information of the random access resource allocated by the target base station to the second group of terminals to the second group of terminals and the first group of terminals, where the first group of terminals can be randomly connected by the random access resource In the response window, the random access response message sent by the target base station is monitored. Therefore, the uplink synchronization information and the uplink resource allocation information are further obtained according to the monitored random access response message to access the target base station.

Specifically, the first group of terminals can obtain the following information by listening to the random access response message: a time advance command sent by the station system to the second group of terminals (English: Timing Advance Command, abbreviation: TAC), and uplink physical resources allocated by the base station system for the second group of terminals and the first group of terminals, and may be based on time The uplink synchronization information and the uplink resource allocation information acquired in the TA (Timing Advance) and the random access response message obtained in the advance command are accessed to the target base station. In this way, only the second group of terminals needs to initiate random access on the corresponding random access resources, and the first group of terminals and the second group of terminals can listen to the corresponding random access response message in the random access response window. A group of terminals and a second group of terminals can access the target base station according to the command of the monitored network side base station system.

In the embodiment of the present invention, the source base station divides the terminal of the same type into the first group terminal and the second group terminal, and when the measurement result of the terminal of the same type meets the preset switching condition, sending a request to the target base station The terminal accesses the handover request of the target base station, and the handover request response information sent by the target base station that is received by the source base station only carries the information of the second group of terminal random access resources, and the information about the access resources allocated to the second group of terminals Sending to the first group of terminals and the second group of terminals, so that the first group of terminals acquires random access response information of the second group of terminals according to the random access resource, and monitors the second group by The random access response message of the terminal acquires the same uplink synchronization information and uplink resource allocation information of the second group of terminals, and accesses the target base station, so that the handover is initiated simultaneously with all the terminals, because only the second group is The terminal initiates random access on the access channel, and the first group of terminals listens to the corresponding random access response message to obtain access signaling. Resources, with access to the target base station, the handover can reduce signaling interaction, random access resource saving, the user simultaneously to improve the efficiency of the base station handover.

The method for the terminal accessing the base station system in the embodiment of the present invention is described in detail in another embodiment. Referring to FIG. 2, another embodiment of the terminal accessing the base station system in the embodiment of the present invention includes:

201. The source base station divides the terminal of the same type into the first group terminal and the second group terminal. The source base station divides the terminals of the same type into the first group terminal and the second group terminal.

It should be noted that the terminal of the same type refers to a terminal that is relatively close in position and has the same action. Wherein, the relatively close position means that the distance between the terminals is less than a preset distance value, and the specific setting of the preset distance value is The actual application is related, for example, according to the distance between the terminal and the base station and the distance comparison between the base stations, and is not limited to the implementation of the solution of the present invention. The same action means that the terminal performs the same behavior. For example, each terminal initiates a handover request.

The source base station can learn which terminals are the same type of terminal by measuring each terminal. E.g A group of terminals with strong selection signal strength or terminal capability can be selected as the second group terminal, and of course, a group of terminals can be randomly selected as the second group terminal. Preferably, the source base station selects one terminal with the highest signal strength and the strongest terminal processing capability as the second group terminal.

202. When a measurement result of the terminal of the same type meets a preset handover condition, send a handover request to the target base station.

203. Receive handover request response information sent by the target base station.

The handover request response information carries information of a random access resource allocated to the second group of terminals.

And when the target base station determines that the first group of terminals and the second group of terminals are accessible, sending, to the source base station, handover request response information, where the target base station is randomly connected to the second group of terminals. Information about resources.

204. The information about the random access resource allocated to the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals acquires the information according to the information about the access resource. Uplink synchronization information and uplink resource allocation information of the first group of terminals to access the target base station;

Specifically, the first group of terminals can obtain the following information by listening to the random access response message: a time advance command sent by the base station system to the second group terminal (English: Timing Advance Command, abbreviation: TAC), and the base station system is The second group of terminals and the first group of terminals are allocated uplink resources, and can access the target base station according to the uplink resources acquired in the TA (Timing Advance) and the random access response message acquired in the time advance command. In this way, only the second group of terminals need to be in the corresponding The random access is initiated on the access resources of the device, and the first group of terminals and the second group of terminals can listen to the corresponding random access response message in the random access response window, and the first group of terminals and the second group of terminals can be configured according to The command of the monitored network side base station system accesses the target base station.

The source base station sends an RRC Connection Reconfiguration message carrying the handover command to the UE, where the RRC Connection Reconfiguration message carries the random access resource information of the UE at the target base station, including a random access channel (English: RandomAccessChannel, abbreviation: RACH) and a Preamble (preamble sequence) ) Information.

The source base station sends the information about the random access resource allocated by the target base station to the second group of terminals to the second group of terminals and the first group of terminals, where the first group of terminals can know the information of the random access resource. The source base station allocates a random access channel and a preamble sequence to the second group of terminals. The first group of terminals can listen to the random access response message sent by the target base station in the random access response window corresponding to the random access resource. Therefore, the uplink synchronization information and the uplink resource allocation information are obtained according to the monitored random access response message, and the target base station is accessed according to the uplink synchronization information and the uplink resource allocation information.

Further, the distance between each terminal and the base station is different. Therefore, if the first group of terminals accesses the target base station according to the TA of the second group, there may be an error. Therefore, in this embodiment, the handover request response information sent by the target base station may include information of a sounding reference signal (English: sounding reference signal, abbreviation: SRS) resource allocated by the target base station to the first group of terminals. After receiving the handover request response information sent by the target base station, the source base station sends, to the first group of terminals, information about the SRS resource allocated by the target base station to the first group of terminals, where the first group of terminals may be Sending an SRS signal to the target base station on the SRS resource, the target base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals.

205. If the target base station receives the access request initiated by the second group of terminals, send a random access response message to the first terminal and the second group of terminals, where the uplink resource allocation of the second group of terminals is included. The information and the uplink synchronization information are such that the first group of terminals and the second group of terminals acquire the uplink resource allocation information and the uplink synchronization information.

The second group of terminals initiates an access request to the target base station, and sends the allocated Preamble on the allocated random access resource. After receiving the corresponding Preamble, the target base station sends a random access response (English: Random Access Response, abbreviation: RAR) message, including the destination in the RAR message The uplink base station allocates uplink resource allocation (English: Uplink allocation, abbreviation: UL allocation) information and uplink synchronization information, wherein the uplink synchronization information may be a timing advance (English: Timing Advance, abbreviation: TA). The uplink synchronization information of the following embodiments is exemplified by TA. The UL allocation information is used to indicate the resource location of the uplink data sent by the UE, and the TA is used for the UE to perform time adjustment on the transmitted data to reduce inter-symbol interference.

The first group of terminals may calculate the location of the RAR message sent by the target base station according to the received random access resource allocated to the second group of terminals, and listen to the RAR message, thereby obtaining the uplink resource allocation information and the TA, and thus may The target base station transmits uplink data and transmits data to the target base station in advance according to the TA to reduce inter-symbol interference.

Further, if the target base station receives the access request initiated by the second group of terminals, the RAR message sent by the target base station to the second group of terminals includes the uplink resource of the first group of terminals. Allocating information, the uplink resource allocation information of the second group of terminals, and the timing advance of the second group of terminals, so that the first group of terminals acquires the second group in the RAR message of the second group of terminals The timing advance of the terminal and the uplink resource allocation information of the first group of terminals. In the embodiment of the present invention, when the target base station sends the uplink resource allocation information of the second group of terminals and the TA of the second group of terminals to the second group of terminals, the target base station may further send the uplink resource allocation of the first group of terminals to the first group of terminals. The information and the TA of the second group of terminals, so that the first group of terminals obtain the uplink resource allocation information of the first group of terminals and the time advance amount of the second group of terminals in the RAR message of the second group of terminals, and Accordingly, uplink data is transmitted to the target base station and data is transmitted to the target base station in advance according to the TA to reduce inter-symbol interference. The TAs of the first group of terminals herein may be identical to the TAs of the second group of terminals, or may be obtained according to the TA correction of the second group of terminals, or may be omitted, but not obtained by the TA of the second group of terminals. Uplink synchronization.

Further, the first group of terminals sends information of the SRS resource to the target base station on the pre-assigned SRS resource, and the target base station may correct the TA according to the received SRS signal.

After the UE successfully connects to the target base station, the UE sends an RRC Connection to the target base station.

The Reconfiguration Complete message is used to notify the target base station that the UE has completed the handover.

In the embodiment of the present invention, the second group of terminals initiates access to the target base station, and the target base station sends a random access response message to the first group of terminals and the second group of terminals, where the uplink resource allocation information and the uplink synchronization information are included, so that the The first group of terminals acquires the uplink resource allocation according to the random access response message Information and the uplink synchronization information, so that the first group of terminals can access and transmit data to the target base station according to the acquired second group of terminal uplink resource allocation information and uplink synchronization information, so as to implement handover from the source base station to the target base station, In the case that all the terminals initiate the handover at the same time, since the base station system only sends signaling to the second group of terminals, the first group of terminals can obtain access signaling and resources by listening to access the target base station, thereby reducing The signaling interaction in the handover saves random access resources and improves the efficiency of the user simultaneously switching the base station. Further, the handover request response information sent by the target base station to the source base station may further include information about the SRS resources allocated by the target base station to the first group of terminals, so that the first group of terminals simultaneously acquires SRS resources, and is used for further Correct the TA to enhance the communication quality with the target base station.

The above is a method for accessing the base station system from the base station system side, that is, the terminal described from the network side. The following describes the method for the terminal to access the base station system from the first group terminal side. Referring to FIG. 3, the terminal in the embodiment of the present invention is connected. The method of entering the base station system includes:

301. The first group of terminals receives information about the random access resources of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminals as the first group of terminals. External terminal

In this embodiment, the source base station divides the terminal of the same type into the first group terminal and the second group terminal, where the first group terminal does not send a random access request to the source base station, and the second group terminal can The source base station sends a random access request. It should be noted that the terminal of the same type refers to a terminal whose distance between the terminals is smaller than a preset distance value and the actions are the same.

The first group of terminals receives information about random access resources of the second group of terminals sent by the source base station.

302. Listen to the access response message of the second group of terminals according to the information about the random access resources of the second group of terminals, and obtain uplink synchronization information and uplink resource allocation information of the second group of terminals.

The first group of terminals can listen to the random access response message sent by the target base station in the random access response window corresponding to the random access resource. Thereby, uplink synchronization information and uplink resource allocation information are obtained from the random access response message.

303. Access the target base station according to uplink synchronization information and uplink resource allocation information of the second group of terminals.

In the embodiment of the present invention, the source base station divides the terminals of the same type into the first group terminal and the second group terminal. The second group of terminals sends a random access request to the source base station, and the first group of terminals does not send a random access request to the source base station, and the target base station sent by the source base station is the random access resource allocated by the second group of terminals. And the random access response message sent by the target base station in the random access response window corresponding to the random access resource according to the information of the random access resource of the second group of terminals, in the random access response message Acquiring the uplink synchronization information and the uplink resource allocation information of the second group of terminals, and accessing the target base station by using the uplink synchronization information and the uplink resource allocation information, so that the first group is initiated simultaneously with respect to all terminals. The base station does not need to send a random access request to the base station system, and the base station system only sends the access signaling and the allocated access resources to the second group of terminals, and the first group of terminals can listen to the access information by using the information of the random access resources. The access and the access resources can access the target base station, which can reduce the signaling interaction in the handover and save random access resources. Improve the efficiency of users switching base stations at the same time.

A method for the terminal accessing the base station system is described in detail in another embodiment. Referring to FIG. 4, another embodiment of the method for the terminal to access the base station system in the embodiment of the present invention includes:

401. The first group of terminals receives information about random access resources of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals. External terminal

The intercepting the access response message of the second group of terminals, and acquiring the uplink synchronization information and the uplink resource allocation information of the second group of terminals according to the information about the random access resources of the second group of terminals;

The source base station sends the information about the random access resource allocated by the target base station to the second group of terminals to the second group of terminals and the first group of terminals, where the first group of terminals can know the information of the random access resource. The source base station allocates a random access channel and a preamble sequence to the second group of terminals. The first group of terminals may listen to the random access response message sent by the target base station in the random access response window corresponding to the random access resource. Therefore, the uplink synchronization information is further obtained according to the monitored random access response message. Specifically, the first group of terminals can obtain the following information by using a random access response message: a time advance command sent by the base station system to the second group terminal (English: Timing Advance Command, abbreviated as TAC), and the base station system is the second The uplink resource allocated by the group terminal and the first group of terminals, and the TA resource obtained by the TA in the random access response message is acquired in the TAC, and the target base station is accessed according to the TA and the acquired uplink resource. In this way, only the second group of terminals needs to initiate random access on the corresponding random access resources, and the first group of terminals and the second group of terminals can listen to the corresponding random access response message in the random access response window. A group of terminals and a second group of terminals can access the target base station according to the command of the monitored network side base station system.

The second group of terminals sends an access request to the target base station, and the allocated Preamble is sent on the allocated random access resource. After receiving the corresponding Preamble, the target base station sends an RAR message, where the target base station is included in the RAR message. The UL allocation information and the TA allocated by the group terminal are used to indicate the resource location of the uplink data sent by the UE, and the TA is used for the UE to adjust the time of transmitting the data to reduce inter-symbol interference.

Further, if the target base station receives the access request initiated by the second group of terminals, the RAR message sent by the target base station to the second group of terminals includes the uplink resource of the first group of terminals. Allocating information, the uplink resource allocation information of the second group of terminals, and the timing advance of the second group of terminals, so that the first group of terminals acquires the second group in the RAR message of the second group of terminals The timing advance of the terminal and the uplink resource allocation information of the first group of terminals. In the embodiment of the present invention, when the target base station sends the uplink resource allocation information of the second group of terminals and the TA of the second group of terminals to the second group of terminals, the target base station may further send the uplink resource allocation of the first group of terminals to the first group of terminals. The information and the TA of the second group of terminals, so that the first group of terminals obtain the uplink resource allocation information of the first group of terminals and the time advance amount of the second group of terminals in the RAR message of the second group of terminals, and Accordingly, uplink data is transmitted to the target base station and data is transmitted to the target base station in advance according to the TA to reduce inter-symbol interference. The TAs of the first group of terminals may be identical to the TAs of the second group of terminals, or may be obtained according to the TA correction of the second group of terminals, or may be omitted, but not according to the TA of the second group of terminals. Get upstream synchronization.

Further, the first group of terminals receives information about the SRS resources allocated by the target base station to the first group of terminals, and the first group of terminals may send an SRS signal to the target base station on the SRS resource, the target The base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals.

403. Access the target base station according to the acquired uplink synchronization information of the second group of terminals and uplink resource allocation information.

In the embodiment of the present invention, the first group of terminals, according to the information about the random access resources of the second group of terminals, listen to the access response message of the second group of terminals, and obtain uplink synchronization information of the second group of terminals and The uplink resource allocation information is used to access the base station, and the handover is initiated simultaneously with all the terminals. Since the base station system only sends signaling on the access channel of the second group of terminals, the first group of terminals are monitored on the access channel. The access signaling and the resource can be obtained, and the target base station can be accessed synchronously with the second group of terminals, which can reduce the signaling interaction in the handover, save the random access resources, and improve the efficiency of the user simultaneously switching the base station. And the first group of terminals can calculate the location of the RAR message sent by the target base station according to the received random access resource allocated to the second group of terminals, and listen to the RAR message, thereby obtaining the uplink resource allocation information and the TA, The uplink data may be sent to the target base station, and the data may be sent to the target base station in advance according to the TA to reduce inter-symbol interference. Further, the first group of terminals receives the SRS resource allocated by the target base station to the first group of terminals. Information, the first group of terminals may send an SRS signal to the target base station on the SRS resource, and the target base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals to enhance communication quality with the target base station. .

For ease of understanding, a flow chart of the signaling in the method for the terminal to access the base station system in the embodiment of the present invention is described in detail below. Please refer to FIG. 5.

501. The source base station sends the group information to the second group terminal.

This step can also be performed after 502.

502. Send measurement control information.

The source base station sends measurement control information Measurement Configuration to the first group of terminals and the second group of terminals, and notifies the UE to perform measurement and report the measurement result.

503. Send a measurement report;

The first group of terminals and the second group of terminals send a measurement report to the source base station. 504. Determine a handover.

The source base station makes a handover decision.

505. Send a handover request.

The source base station sends a handover request to the target base station, requesting the first group of terminals and the second group of terminals to switch to the target base station.

506, access control;

The target base station determines that the first group of terminals and the second group of terminals can be handed over to the target base station.

507. Switching request response;

The target base station sends a handover request ACK, which is an answer to the handover request sent by the source base station, indicating that the target base station is ready to perform handover. The information of the random access channel is carried in the handover request response information. The handover request response information may also carry the target base station to be allocated to the first group of terminals.

The information of the SRS resource is used for the first group of terminal correction TA.

508. Send an RRC connection reconfiguration message.

The source base station sends an RRC Connection Reconfiguration message carrying a handover command to the first group of terminals and the second group of terminals, where the RRC Connection Reconfiguration message carries the random access resource information of the UE at the target base station.

In this step, the information about the SRS resource allocated by the target base station to the first group of terminals sent by the source base station may also be sent, so that the target base station corrects the TA of the first group of terminals.

510. Send a RAR message.

The target base station sends the RAR message to the first group of terminals, where the uplink resource allocation information and the time advancement amount of the second group of terminals are included, and the uplink resource allocation information of the first group and the second group of terminals and the second group may also be included. The amount of time advancement of the terminal.

The information about the SRS resources allocated by the target base station to the first group of terminals may be sent in this step, and used to modify the TA of the first group of terminals.

In this step, the information of the SRS resource allocated by the target base station to the first group of terminals may be monitored for modifying the TA.

511. The connection reconfiguration is completed.

After the first group of terminals and the second group of terminals are successfully connected to the target base station, the RRC Connection Reconfiguration Complete message is sent to the target base station, and the port target base has completed the handover. The base station system in the embodiment of the present invention is described below. Referring to FIG. 6, the base station system in this embodiment includes:

a source base station 601 and a target base station 602;

The source base station 601 is configured to divide the terminal of the same type into the first group terminal and the second group terminal;

Sending a handover request to the target base station 602 when the measurement result of the terminal of the same type meets a preset handover condition, where the handover request is used to request the first group of terminals and the second group of terminals to The source base station switches to 601 target base station 602;

Receiving, by the target base station 602, handover request response information, where the handover request response information includes information of a random access resource allocated to the second group of terminals;

And transmitting the information about the random access resource that is allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group of terminals according to the random access resource The information acquires uplink synchronization information and uplink resource allocation information to access the target base station.

The target base station 602 is configured to: if receiving an access request initiated by the second group of terminals, send a random access response message to the first group of terminals and the second group of terminals, where the random access The response message includes the uplink resource allocation information and the uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals acquire the uplink resource allocation information and the uplink synchronization information.

Further, the target base station 602 is further configured to: if receiving an access request initiated by the second group of terminals, send a random access response message to the first group of terminals and the second group of terminals, where The random access response message includes the uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals, and the uplink synchronization information of the second group of terminals, so that the first group of terminals acquires the The uplink resource allocation information of the first group of terminals and the uplink synchronization information of the second group of terminals, the second group of terminals acquiring the uplink resource allocation information of the second group of terminals and the uplink synchronization information of the second group of terminals .

Further, the handover request response information further includes information of the sounding reference signal resource allocated by the target base station 602 for the first group of terminals;

The source base station 601 is further configured to send information of the sounding reference signal resource allocated by the target base station 602 to the first group of terminals to the first group of terminals, where the first group of terminals are in the detecting Sending a sounding reference signal to the target base station on the reference signal resource, such that the target base station 602 And correcting uplink synchronization information of the first group of terminals according to the received sounding reference signal.

For the specific process of the function of the source base station and the target base station in the base station system in this embodiment, refer to the description of the embodiment shown in FIG. 1 to FIG. 5, and details are not described herein again.

In the embodiment of the present invention, the source base station 601 divides the terminals of the same type into the first group of terminals and the second group of terminals. When the measurement results of the terminals of the same type meet the preset switching conditions, the request is sent to the target base station 602. The terminal accesses the handover request of the target base station, and the handover request response information sent by the target base station received by the source base station 601 carries only the information of the second group of terminal random access resources, and is allocated to the access resources of the second group of terminals. The information is sent to the first group of terminals and the second group of terminals, so that the first group of terminals obtains random access response information of the second group of terminals according to the random access resource, and monitors the second The random access response message of the group terminal acquires the same uplink synchronization information and uplink resource allocation information of the second group of terminals, and accesses the target base station according to the uplink synchronization information and the uplink resource allocation information, so that, simultaneously with all the terminals, In the case of initiating a handover, since only the second group of terminals initiates random access on the access channel, the first group of terminals monitors The corresponding random access response message to obtain the access signaling and resources to achieve the target base station 602 and access, handover signaling interaction can be reduced, saving the random access resources and improve efficiency of the user while switching the base station. And, when the second group of terminals initiates the access to the target base station 602, the target base station 602 sends a random access response message to the second group of terminals, where the uplink resource allocation information and the uplink synchronization information are included, so that the first group of terminals listens for the acquisition. Up to the uplink resource allocation information and the uplink synchronization information, so that the first group of terminals can access the target base station 602 according to the acquired second group of terminal uplink resource allocation information and uplink synchronization information, and send data to the source station 602 to implement the source The base station 601 switches to the target base station 602. When the base station system only sends the signaling to the second group of terminals, the first group of terminals can obtain the access signaling and resources by monitoring. The target base station 602 is accessed, so that the signaling interaction in the handover can be reduced, the random access resources are saved, and the efficiency of the user simultaneously switching the base station is improved. Further, the handover request response information sent by the target base station 602 to the source base station 601 may further include information about the SRS resources allocated by the target base station 602 for the first group of terminals, so that the first group of terminals simultaneously acquire SRS resources, and used for The TA is further modified to enhance the communication quality with the target base station 602.

Referring to FIG. 7, an embodiment of the base station in this embodiment includes:

a grouping unit 701, configured to source, by the source base station, the terminal of the same type into the first group terminal and the second group terminal; The sending unit 702 is configured to: when the measurement result of the terminal of the same type meets the preset switching condition, send a handover request to the target base station, where the handover request is used to request the first group of terminals and the second group The terminal switches from the source base station to the target base station;

The receiving unit 703 is configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals;

The sending unit 702 is further configured to send the information about the random access resource allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first The group terminal acquires uplink synchronization information and uplink resource allocation information according to the information of the random access resource to access the target base station.

Further, the sending unit 702 is further configured to send, to the first group of terminals, information about the sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals are in the detecting The sounding reference signal is sent to the target base station on the reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.

For the specific process of the respective functions of the base station in this embodiment, refer to the description of the embodiment shown in FIG. 1 and FIG. 2, and details are not described herein again.

In the embodiment of the present invention, the grouping unit 701 of the source base station divides the terminals of the same type into the first group terminal and the second group terminal. When the measurement results of the terminals of the same type meet the preset switching condition, the sending unit 702 sends The target base station sends a handover request requesting the terminal to access the target base station, and the handover request response information sent by the target base station received by the receiving unit 703 carries only the information of the second group of terminal random access resources, and the sending unit 702 allocates the information to the The information about the access resources of the second group of terminals is sent to the first group of terminals and the second group of terminals, so that the first group of terminals obtains the random access response information of the second group of terminals according to the random access resource. Obtaining the same uplink synchronization information and uplink resource allocation information of the second group of terminals by listening to the random access response message of the second group of terminals, and accessing the target base station according to the uplink synchronization information and uplink resource allocation information. In this way, relative to all terminals simultaneously initiate handover, since only the second group of terminals initiates on the access channel Accessing, the first group of terminals can obtain access signaling and resources by listening to the corresponding random access response message, and the access target base station can reduce the signaling interaction in the handover, save random access resources, and improve users simultaneously. Switch the efficiency of the base station. Further, the sending unit 702 sends, to the first group of terminals, information of the sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals is detecting The sounding reference signal is sent to the target base station on the reference signal resource, so that the target base station corrects the uplink synchronization information of the first group of terminals according to the received sounding reference signal, and enhances the communication quality between the first terminal and the target base station.

Referring to FIG. 8, another embodiment of the base station in this embodiment includes:

Processor 801, transmitter 802 and receiver 803;

The processor 801 is configured to: the source base station divides the terminal of the same type into the first group terminal and the second group terminal;

The transmitter 802 is configured to: when a measurement result of the terminal of the same type meets a preset handover condition, send a handover request to the target base station, where the handover request is used to request the first group of terminals and a Translating, by the second group of terminals, the source base station to the target base station;

The receiver 803 is configured to receive, by the target base station, handover request response information, where the handover request response information includes information about a random access resource allocated to the second group of terminals; 802. The 802 is further configured to send the information about the random access resource that is allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group of terminals according to the The information about the random access resource acquires uplink synchronization information and uplink resource allocation information to access the target base station.

Further, the transmitter 802 is further configured to send, to the first group of terminals, information of sounding reference signal resources allocated by the target base station to the first group of terminals, where the first group of terminals is located at the first group of terminals. Sending a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal.

Referring to FIG. 9, an embodiment of a terminal in the embodiment of the present invention includes:

The receiving information unit 901 is configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals. a terminal other than the first group of terminals;

The obtaining information unit 902 is configured to listen to the access response message of the second group of terminals according to the information about the random access resources of the second group of terminals received by the receiving information unit 901, and acquire the access response. The uplink synchronization information and the uplink resource allocation information of the second group of terminals in the message; the access unit 903, configured to access the target according to the uplink synchronization information and the uplink resource allocation information acquired by the acquiring information unit 902 Base station. For the specific process of implementing the functions of the functional units of the terminal in this embodiment, refer to the description of the embodiment shown in FIG. 3, and details are not described herein again.

In the embodiment of the present invention, the source base station divides the terminal of the same type into the first group terminal and the second group terminal, wherein only the second group terminal sends a random access request to the source base station, and the first group terminal does not send the source terminal to the source base station. The receiving information unit 901 receives the information of the random access resource allocated by the target base station to the second group of terminals, and the acquiring information unit 902 passes the information of the random access resource of the second group of terminals. Obtaining a random access response message sent by the target base station in the random access response window corresponding to the random access resource, and acquiring uplink synchronization information and uplink resource allocation information of the second group of terminals in the random access response message, The ingress unit 903 accesses the target base station by using the uplink synchronization information and the uplink resource allocation information, so that the first group of base stations does not need to send a random access request to the base station system, but the base station system Only the second group of terminals sends access signaling and allocates access resources, and the first group of terminals can pass Information monitor the random access resources and access resources of the access signaling, can access the target base station, handover signaling interaction can be reduced, saving the random access resources and improve efficiency of the user while switching the base station.

Referring to FIG. 10, another embodiment of the terminal in the embodiment of the present invention includes:

a receiving information unit 1001, configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type of terminal as the first group of terminals a terminal other than the first group of terminals;

The obtaining information unit 1002 is configured to listen to the access response message of the second group of terminals according to the information about the random access resources of the second group of terminals received by the receiving information unit 1001, and acquire the access response The uplink synchronization information and the uplink resource allocation information of the second group of terminals in the message; the access unit 1003, configured to access the target according to the uplink synchronization information and the uplink resource allocation information acquired by the acquiring information unit 1002 Base station.

Further, the receiving information unit 1001 is further configured to receive a random access response message sent by the target base station;

The acquiring information unit 1002 is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message;

The access unit 1003 is further configured to access the target base station according to uplink resource allocation information and uplink synchronization information of the second group of terminals. Further, the receiving information unit 1001 is further configured to receive a random access response message sent by the target base station;

The acquiring information unit 1002 is further configured to acquire uplink resource allocation information, the second, of the first group of terminals that are sent by the target base station to the second group of terminals included in the random access response message. Uplink resource allocation information of the group terminal and uplink synchronization information of the second group of terminals;

The access unit 1003 is further configured to access the target base station according to uplink resource allocation information of the first group of terminals and uplink synchronization information of the second group of terminals;

The receiving information unit 1001 is further configured to receive information about the sounding reference signal resource allocated by the target base station to the first group of terminals.

In the embodiment of the present invention, the terminal may further include:

The sending signal unit 1004 is configured to send, by using the sounding reference signal resource, a sounding reference signal to the target base station, so that the target base station corrects uplink synchronization information of the first group of terminals according to the received sounding reference signal. .

For the specific process of implementing the respective functions of the functional units of the terminal in this embodiment, refer to the description of the embodiment shown in FIG. 3 and FIG. 4, and details are not described herein again.

In the embodiment of the present invention, the receiving information unit 1001 receives the random access response message sent by the target base station, and the acquiring information unit 1002 obtains the uplink resource allocation information of the second group of terminals included in the random access response message. The uplink synchronization information, the access unit 1003 accesses the target base station according to the uplink resource allocation information and the uplink synchronization information of the second group of terminals, and therefore may send uplink data to the target base station and send data to the target base station according to the TA advance to reduce the code interval. The receiving information unit 1001 receives the information of the SRS resource allocated by the target base station to the first group of terminals, and the first group of terminals may send an SRS signal to the target base station on the SRS resource, the target. The base station performs channel estimation according to the received SRS signal, and corrects the TA of the first group of terminals to enhance communication quality with the target base station.

Referring to FIG. 11, another embodiment of the terminal in the embodiment of the present invention includes:

a processor 1101, a receiver 1102 and a transmitter 1103;

The receiver 1102 is configured to receive, by the first group of terminals, information about a random access resource of the second group of terminals sent by the source base station, where the second group of terminals is the same type as the first group of terminals. a terminal other than the first group of terminals in the terminal; The processor 1101 is configured to: according to the information about the random access resources of the second group of terminals received by the receiving information unit, listen to an access response message of the second group of terminals, and obtain the access response. Uplink synchronization information and uplink resource allocation information of the second group of terminals in the message;

The processor 1101 is further configured to access the target base station according to the uplink synchronization information and uplink resource allocation information acquired by the acquiring unit information.

Further, the receiver 1102 is further configured to receive a random access response message sent by the target base station, and receive a sounding reference signal resource allocated by the target base station to the first group of terminals by the source base station. Information;

The processor 1101 is further configured to acquire uplink resource allocation information and uplink synchronization information of the second group of terminals included in the random access response message, and acquire the information included in the random access response message. Uplink resource allocation information of the first group of terminals, uplink resource allocation information of the second group of terminals, and uplink synchronization information of the second group of terminals sent by the target base station to the second group of terminals;

The processor 1101 is further configured to access the target base station according to the uplink resource allocation information and the uplink synchronization information of the second group of terminals, and the uplink resource allocation information according to the first group of terminals and the The uplink synchronization information of the second group of terminals accesses the target base station;

The transmitter 1103 is configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects uplink synchronization of the first group of terminals according to the received sounding reference signal. information.

A person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by a program to instruct related hardware, and the program may be stored in a computer readable storage medium, the above mentioned storage medium. It can be a read-only memory, a disk or a disc, and the like.

The method, the device and the system for the terminal accessing the base station system provided by the present invention are described in detail above. For those skilled in the art, according to the idea of the embodiment of the present invention, there will be a specific implementation manner and application range. The details of the description are not to be construed as limiting the invention.

Claims

Rights request

1. A method for a terminal to access a base station system. The base station system includes a source base station and a target base station. It is characterized in that the method includes:

The source base station divides terminals of the same type into a first group of terminals and a second group of terminals;

When the measurement results for the same type of terminals meet the preset switching conditions, a switching request is sent to the target base station, where the switching request is used to request the first group of terminals and the second group of terminals to switch from the The source base station switches to the target base station;

Receive handover request response information sent by the target base station, where the handover request response information includes information about random access resources allocated to the second group of terminals;

Send the information about the random access resources allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group of terminals can use the random access resources according to the random access resources. The information obtains uplink synchronization information and uplink resource allocation information to access the target base station.

2. The method according to claim 1, characterized in that, the method further includes: if the target base station receives an access request initiated by the second group of terminals, sending an access request to the first group of terminals and all terminals. The second group of terminals sends a random access response message, and the random access response message contains the uplink resource allocation information and uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals The terminal obtains the uplink resource allocation information and uplink synchronization information.

3. The method according to claim 1 or 2, characterized in that, the method further includes: if the target base station receives an access request initiated by the second group of terminals, sending an access request to the first group of terminals. Send a random access response message to the second group of terminals. The random access response message includes the uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals and the second group of terminals. The uplink synchronization information enables the first group of terminals to obtain the uplink resource allocation information of the first group of terminals and the uplink synchronization information of the second group of terminals, and the second group of terminals obtains the uplink synchronization information of the second group of terminals. Uplink resource allocation information and uplink synchronization information of the second group of terminals.

4. The method according to claim 1, characterized in that,

The handover request response information also includes information about the sounding reference signal resources allocated by the target base station to the first group of terminals;

After receiving the handover request response information sent by the target base station, the step further includes:

Send the sounding reference allocated by the target base station to the first group of terminals to the first group of terminals Information on signal resources, used by the first group of terminals to send sounding reference signals to the target base station on the sounding reference signal resources, so that the target base station corrects the first sounding reference signal according to the received sounding reference signal. Uplink synchronization information of group terminals.

5. A method for a terminal to access a base station system, characterized in that the base station system includes a source base station and a target base station, and the method includes:

A first group of terminals receives information from the source base station on random access resources allocated to a second group of terminals. The second group of terminals are terminals of the same type as the first group of terminals except for the first group. Terminal other than terminal;

Monitor the random access response message of the second group of terminals according to the information of the random access resources of the second group of terminals, and obtain the uplink synchronization information of the second group of terminals in the random access response message. and uplink resource allocation information;

Access the target base station according to the uplink synchronization information and uplink resources.

6. The method according to claim 5, characterized in that, the method further includes: receiving a random access response message sent by the target base station;

Obtain the uplink resource allocation information and time synchronization information of the second group of terminals contained in the random access response message, and access the target base station according to the uplink resource allocation information and time synchronization information of the second group of terminals. .

7. The method according to claim 5 or 6, characterized in that, the method further includes: receiving a random access response message sent by the target base station;

Obtain the uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals and the uplink resource allocation information of the second group of terminals sent by the target base station to the second group of terminals and included in the random access response message. uplink synchronization information of the second group of terminals, and access the target base station according to the uplink resource allocation information of the first group of terminals and the uplink synchronization information of the second group of terminals.

8. The method according to claim 5, characterized in that, the method further includes: receiving information from the source base station on the sounding reference signal resources allocated by the target base station to the first group of terminals;

The sounding reference signal is sent to the target base station on the sounding reference signal resource, so that the target base station corrects the uplink synchronization information and uplink resource allocation information of the first group of terminals according to the received sounding reference signal.

9. A base station system, characterized by including:

Source base station and target base station;

Wherein, the source base station is used to divide terminals of the same type into a first group of terminals and a second group of terminals;

10. The system according to claim 9, characterized in that,

The target base station is configured to, upon receiving an access request initiated by the second group of terminals, send a random access response message to the first group of terminals and the second group of terminals, where the random access response message The message contains the uplink resource allocation information and uplink synchronization information of the second group of terminals, so that the first group of terminals and the second group of terminals obtain the uplink resource allocation information and uplink synchronization information.

11. The system according to claim 9, characterized in that,

The target base station is also configured to, if receiving an access request initiated by the second group of terminals, send a random access response message to the first group of terminals and the second group of terminals, the random access The response message includes the uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals, and the uplink synchronization information of the second group of terminals, so that the first group of terminals obtains the first group of terminals. The uplink resource allocation information and the uplink synchronization information of the second group of terminals are obtained by the second group of terminals. The second group of terminals obtains the uplink resource allocation information of the second group of terminals and the uplink synchronization information of the second group of terminals.

12. The system according to any one of claims 9 to 11, characterized in that,

The source base station is also configured to send to the first group of terminals information about the sounding reference signal resources allocated by the target base station to the first group of terminals, for the first group of terminals to use the sounding reference signal when the first group of terminals A sounding reference signal is sent to the target base station on the resource, so that the target base station corrects the uplink synchronization information of the first group of terminals according to the received sounding reference signal.

13. A base station, characterized by including:

The grouping unit is used by the source base station to divide terminals of the same type into a first group of terminals and a second group of terminals;

A sending unit, configured to send a switching request to the target base station when the measurement results of the same type of terminals meet the preset switching conditions, where the switching request is used to request the first group of terminals and the second group of terminals. The group terminal switches from the source base station to the target base station;

A receiving unit configured to receive handover request response information sent by the target base station, where the handover request response information includes information about random access resources allocated to the second group of terminals;

The sending unit is further configured to send the information about the random access resources allocated to the second group of terminals to the first group of terminals and the second group of terminals, so that the first group of terminals The terminal obtains uplink synchronization information and uplink resource allocation information according to the random access resource information to access the target base station.

14. The base station according to claim 13, characterized in that,

The sending unit is also configured to send to the first group of terminals information about the sounding reference signal resources allocated by the target base station to the first group of terminals, for the first group of terminals to use the sounding reference signal when the first group of terminals A sounding reference signal is sent to the target base station on the resource, so that the target base station corrects the uplink synchronization information of the first group of terminals according to the received sounding reference signal.

15. A base station, characterized by including:

Processors, transmitters and receivers;

Wherein, the processor is used by the source base station to divide terminals of the same type into a first group of terminals and a second group of terminals;

The transmitter is configured to send a switching request to the target base station when the measurement results of the same type of terminals meet the preset switching conditions, and the switching request is used to request the first group of terminals and the A second group of terminals is handed over from the source base station to the target base station;

The receiver is configured to receive handover request response information sent by the target base station, where the handover request response information includes information about random access resources allocated to the second group of terminals; the transmitter, It is also used to allocate the random access resources allocated to the second group of terminals. The information is sent to the first group of terminals and the second group of terminals, so that the first group of terminals obtains uplink synchronization information and uplink resource allocation information according to the information of the random access resources to access the target base station.

16. A terminal, characterized in that it includes:

The receiving information unit is used for the first group of terminals to receive the random access resource information of the second group of terminals sent by the source base station. The second group of terminals are all terminals of the same type as the first group of terminals. terminals other than the first group of terminals;

Obtaining information unit, configured to monitor the access response message of the second group of terminals according to the information of the random access resources of the second group of terminals received by the receiving information unit, and obtain the access response message in the access response message The uplink synchronization information and uplink resource allocation information of the second group of terminals;

An access unit, configured to access the target base station according to the uplink synchronization information and uplink resource allocation information obtained by the acquisition unit information.

17. The terminal according to claim 16, characterized in that,

The receiving information unit is also used to receive a random access response message sent by the target base station; the obtaining information unit is also used to obtain the uplink information of the second group of terminals contained in the random access response message. Resource allocation information and uplink synchronization information;

The access unit is also configured to access the target base station according to the uplink resource allocation information and uplink synchronization information of the second group of terminals.

18. The device according to claim 16 or 17, characterized in that,

The information acquisition unit is also configured to acquire the uplink resource allocation information of the first group of terminals sent by the target base station to the second group of terminals, the second group of terminals, and the information contained in the random access response message. Uplink resource allocation information of the terminal and uplink synchronization information of the second group of terminals;

The access unit is also configured to access the target base station according to the uplink resource allocation information of the first group of terminals and the uplink synchronization information of the second group of terminals.

19. The device according to claim 16, characterized in that,

The receiving information unit is also configured to receive information from the source base station on the sounding reference signal resources allocated by the target base station to the first group of terminals;

The device also includes:

A signal sending unit configured to send soundings to the target base station on the sounding reference signal resources. The reference signal enables the target base station to correct the uplink synchronization information of the first group of terminals according to the received sounding reference signal.

20. A terminal, characterized in that it includes:

Processors, receivers and transmitters;

Wherein, the receiver is used for a first group of terminals to receive random access resource information of a second group of terminals sent by the source base station, and the second group of terminals are terminals of the same type as the first group of terminals. terminals other than the first group of terminals;

The processor is configured to monitor the access response message of the second group of terminals according to the information of the random access resources of the second group of terminals received by the receiving information unit, and obtain the access response message. The uplink synchronization information and uplink resource allocation information of the second group of terminals;

The processor is further configured to access the target base station according to the uplink synchronization information and uplink resource allocation information obtained by the acquisition unit information.

21. The terminal according to claim 20, characterized in that,

The receiver is further configured to receive a random access response message sent by the target base station, and receive information on sounding reference signal resources allocated by the target base station for the first group of terminals sent by the source base station;

The processor is further configured to obtain the uplink resource allocation information and uplink synchronization information of the second group of terminals contained in the random access response message, and to obtain all the uplink resource allocation information and uplink synchronization information contained in the random access response message. The uplink resource allocation information of the first group of terminals, the uplink resource allocation information of the second group of terminals, and the uplink synchronization information of the second group of terminals sent by the target base station to the second group of terminals;

The processor is further configured to access the target base station according to the uplink resource allocation information and uplink synchronization information of the second group of terminals, and to access the target base station according to the uplink resource allocation information and the first group of terminals. The uplink synchronization information of the two groups of terminals is accessed to the target base station;

The transmitter is configured to send a sounding reference signal to the target base station on the sounding reference signal resource, so that the target base station corrects the uplink synchronization information of the first group of terminals according to the received sounding reference signal. .