CN102695164A - Update-processing method of timing advance value, base station, user equipment and system - Google Patents

Abstract

The present invention provides a timing advance value update processing method, base station, user equipment and system. The method for updating the timing advance value includes: when the timing advance value of the timing advance group of the user equipment needs to be adjusted, selecting a cell from the timing advance group; sending a timing advance command to the user equipment on the cell, The timing advance command carries adjustment information; the adjustment information is used for the user equipment to modify the timing advance value of the timing advance group according to the adjustment information. The technical solution of this embodiment can ensure low signaling overhead in the process of updating the TA value; and can effectively update and maintain the TA in the UE.

Description

Timing advance value update processing method, base station, user equipment and system

technical field

Embodiments of the present invention relate to the field of communication technologies, and in particular, to a timing advance value update processing method, base station, user equipment, and system.

Background technique

In a communication system, such as in the Long Term Evolution (hereinafter referred to as LTE) communication system, in order to ensure that the user equipment (User Equipment; hereinafter referred to as UE) served by the evolved base station (Evolution Node B; hereinafter referred to as eNB) sends The uplink signal can reach the base station synchronously, such as eNB. During the uplink transmission process, the eNB will adjust the corresponding Timing Advance (TA) value for the served UE according to the offset of the uplink signal.

In a communication system, such as an LTE system, it may have a carrier aggregation (Carrier Aggregation; hereinafter referred to as CA) feature, and a UE may aggregate multiple cells to communicate with a base station, such as an eNB. The uplink signal of the UE may be sent to the eNB through different cells, but the lengths of transmission paths through different cells may be different. For example, when passing through some cells, it may need to pass through a frequency selection repeater (Repeater), while passing through other cells may not need to pass through. Usually, the cells corresponding to the UE and having the same TA value are called a TA group. The multiple cells aggregated by the UE may belong to different TA groups. Usually, the TA information table of the UE will be stored in the memory of the UE, wherein the TA information table includes each TA group identifier of the UE, and the cell identifiers included in the TA group corresponding to each TA group identifier and the corresponding The TA value of each TA group.

During the use of the UE, in various scenarios, how the UE updates the TA value of the TA group of the UE is a technical problem that needs to be solved urgently in the prior art.

Contents of the invention

The timing advance value update processing method, base station, user equipment and system provided by the embodiments of the present invention are used to update the timing advance value corresponding to the corresponding timing advance group when the timing advance group of the user equipment or the timing advance value of the timing advance group changes. Timing advance value.

An embodiment of the present invention provides a method for updating a timing advance value, including:

When the timing advance value of the timing advance group of the user equipment needs to be adjusted, select a cell from the timing advance group;

Sending a timing advance command to the user equipment on the cell, where the timing advance command carries adjustment information; the adjustment information is used for the user equipment to modify the timing advance of the timing advance group according to the adjustment information value.

An embodiment of the present invention provides a method for updating a timing advance value, including:

Sending a configuration message to the user equipment, where the configuration message carries an identifier of the added cell, so that the user equipment can configure the added cell for the user equipment according to the identifier of the added cell;

Broadcast the identity of the timing advance group to which the added cell belongs in the system message of the added cell, so that the user equipment can acquire the identity of the timing advance group, and according to the identity of the timing advance group and the The identifier of the configured timing advance group of the user equipment is used to obtain the timing advance value of the timing advance group to which the added cell belongs.

An embodiment of the present invention provides a method for updating a timing advance value, including:

It is determined that the timing advance group to which the cell of the user equipment belongs is changed from the first timing advance group to the second timing advance group;

sending a modification request message to the user equipment, where the modification request message is used by the user equipment to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information. Two timing advance groups, and acquire the timing advance value of the second timing advance group.

An embodiment of the present invention provides a method for updating a timing advance value, including:

receiving a timing advance command sent by the base station on a cell in the timing advance group, where the timing advance command carries adjustment information;

modifying the timing advance value of the timing advance group to which the cell belongs according to the adjustment information.

An embodiment of the present invention provides a method for updating a timing advance value, including:

receiving a configuration message sent by the base station, the configuration message carrying the identifier of the added cell, and configuring the added cell according to the identifier of the added cell;

receiving a system message of the added cell broadcast by the base station, where the system message carries an identifier of a timing advance group to which the added cell belongs;

Acquire the timing advance value of the timing advance group to which the added cell belongs according to the identifier of the timing advance group and the identifiers of the configured timing advance groups.

An embodiment of the present invention provides a method for updating a timing advance value, including:

When the timing advance group to which the cell belongs changes, receiving modification request information sent by the base station, where the modification request information is used to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group;

Modifying the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information;

Acquiring a timing advance value of the second timing advance group.

An embodiment of the present invention provides a base station, including:

A selection module, configured to select a cell from the timing advance group when the timing advance value of the timing advance group of the user equipment needs to be adjusted;

A sending module, configured to send a timing advance command to the user equipment on the cell selected by the selection module, where the timing advance command carries adjustment information; the adjustment information is used by the user equipment according to the The adjustment information modifies the timing advance value of the timing advance group.

An embodiment of the present invention provides a base station, including:

A sending module, configured to send a configuration message to the user equipment, where the configuration message carries an identifier of an added cell, so that the user equipment can configure the added cell for the user equipment according to the identifier of the added cell. Community;

A broadcasting module, configured to broadcast the identifier of the timing advance group to which the added cell belongs in the system message of the added cell, so that the user equipment can obtain the identifier of the timing advance group, and The identifier of the group and the identifier of the configured timing advance group of the user equipment, and obtain the timing advance value of the timing advance group to which the added cell belongs.

An embodiment of the present invention provides a base station, including:

A determining module, configured to determine that the timing advance group to which the cell of the user equipment belongs is changed from the first timing advance group to the second timing advance group;

A sending module, configured to send a modification request message to the user equipment according to the result determined by the determining module, the modification request message is used for the user equipment to advance the timing to which the cell belongs according to the modification request information The group is changed from the first timing advance group to the second timing advance group, and a timing advance value of the second timing advance group is acquired.

An embodiment of the present invention provides a user equipment, including:

A receiving module, configured to receive a timing advance command sent by the base station on a cell in the timing advance group; the timing advance command carries adjustment information;

A modifying module, configured to modify the timing advance value of the timing advance group to which the cell belongs according to the adjustment information in the timing advance command received by the receiving module.

An embodiment of the present invention provides a user equipment, including:

A receiving module, configured to receive a configuration message sent by the base station, where the configuration message carries the identity of the added cell;

A configuring module, configured to configure a cell corresponding to the added cell identifier as a cell of the user equipment according to the configuration message received by the receiving module;

The receiving module is further configured to receive a system message of the added cell broadcast by the base station, where the system message carries an identifier of a timing advance group to which the added cell belongs;

An acquiring module, configured to acquire the timing advance value of the timing advance group to which the added cell belongs according to the identifier of the timing advance group received by the receiving module and the identifiers of already configured timing advance groups.

An embodiment of the present invention provides a user equipment, including:

A receiving module, configured to receive a modification request sent by the base station for modifying the timing advance group to which the aggregated cell belongs from the first timing advance group to the second timing advance group when the timing advance group to which the cell belongs changes information;

A modification module, configured to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information received by the receiving module;

An obtaining module, configured to modify the timing advance group to which the cell belongs to the second timing advance group according to the modifying module, and obtain a timing advance value of the second timing advance group.

The embodiment of the present invention also provides a communication system, including: a base station and user equipment;

The base station is configured to select a cell from the timing advance group when the timing advance value of the timing advance group of the user equipment needs to be adjusted; send a timing advance command to the user equipment on the cell, the Adjustment information is carried in the timing advance command;

The user equipment is configured to receive the timing advance command sent by the base station on the cell, and modify the timing advance value of the timing advance group to which the cell belongs according to the adjustment information.

The embodiment of the present invention also provides a communication system, including: a base station and user equipment;

The base station is configured to send a configuration message to the user equipment, where the configuration message carries the identifier of the added cell, and broadcasts the information of the timing advance group to which the added cell belongs in the system message of the added cell logo;

The user equipment is configured to receive the configuration message sent by the base station, and receive the system message of the added cell broadcast by the base station, according to the identifier of the timing advance group and the identifier of the configured timing advance group, Acquire the timing advance value of the timing advance group to which the added cell belongs.

The embodiment of the present invention also provides a communication system, including: a base station and user equipment;

The base station is configured to determine that the timing advance group to which the cell of the user equipment belongs is changed from the first timing advance group to the second timing advance group; and send a modification request message to the user equipment;

The user equipment is configured to receive modification request information sent by the base station, and modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information , and acquire the timing advance value of the second timing advance group.

The update processing method, base station, user equipment and system of the timing advance value in the embodiment of the present invention, when the TA value of the UE's TA group needs to be adjusted, or when the UE adds a new cell or when the TA group to which the UE's cell belongs changes , the technical solution of the embodiment of the present invention may be used to update the TA value in the above case. By adopting the technical solution of the embodiment of the present invention, the signaling overhead in the process of updating the TA value can be ensured to be low, and the updating and maintenance of the TA in the UE can be effectively implemented.

Description of drawings

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

FIG. 1 is a flow chart of a method for updating a TA value provided by Embodiment 1 of the present invention.

FIG. 2 is a flow chart of a method for updating a TA value provided by Embodiment 2 of the present invention.

FIG. 3 is a flow chart of a method for updating a TA value provided by Embodiment 3 of the present invention.

FIG. 4 is a flow chart of a method for updating a TA value provided by Embodiment 4 of the present invention.

FIG. 5 is a flow chart of a method for updating a TA value provided by Embodiment 5 of the present invention.

FIG. 6 is a flow chart of a method for updating a TA value provided by Embodiment 6 of the present invention.

FIG. 7 is a schematic structural diagram of a communication system provided by Embodiment 7 of the present invention.

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

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

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

FIG. 11 is a schematic structural diagram of a UE provided by Embodiment 11 of the present invention.

FIG. 12 is a schematic structural diagram of a UE provided by Embodiment 12 of the present invention.

FIG. 13 is a schematic structural diagram of a UE provided by Embodiment 13 of the present invention.

FIG. 14 is a schematic structural diagram of a communication system provided by Embodiment 14 of the present invention.

FIG. 15 is a schematic structural diagram of a communication system provided by Embodiment 15 of the present invention.

FIG. 16 is a schematic structural diagram of a communication system provided by Embodiment 16 of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

There are two techniques for dividing TA groups: one is to divide the UE's cells into TA groups according to the same or different TA values of the UE's current cells, which is called UE-level TA groups. The other is a cell-level TA group, which can be divided into TA groups for different cells according to network deployment and other conditions. At this time, the cells belonging to a TA group are fixed, regardless of which UE the cell belongs to.

FIG. 1 is a flow chart of a method for updating a TA value provided by Embodiment 1 of the present invention. The processing method for updating the TA value in this embodiment is executed by a base station, such as an eNB. As shown in Figure 1, the update processing method of the TA value in this embodiment may specifically include the following steps:

Step 100, when the TA value of the UE's TA group needs to be adjusted, select a cell from the TA group;

Step 101: Send a TA command to the UE on the cell, and the TA command carries adjustment information; the adjustment information is used for the UE to modify the TA value of the TA group according to the adjustment information.

Specifically, when the base station recognizes that the TA value of the TA group of the UE has changed and needs to be adjusted, the base station selects a cell from the TA group. Then send a TA command (Command) to the UE on the selected cell. The TA Command carries adjustment information. In this way, when the UE receives the TA command through the cell, it can obtain the adjustment information from it, and modify the TA value of the TA group to which the cell belongs according to the adjustment information, so as to realize effective adjustment of the TA value of the TA group in the UE. Updates and maintenance. Specifically, a TA information table of the UE may be stored in the memory of the UE, and the TA information table may include the identifiers of each TA group of the UE, the identifier of the cell corresponding to each TA group, and the ID of each TA group. Corresponding TA value and other information. The UE may send an uplink signal according to relevant information in the TA information table. Here, according to the adjustment information, the UE can specifically modify the TA value of the TA group stored in the TA information table in the memory, so that the UE can subsequently send uplink signals according to the TA value, so as to ensure that the uplink signals can reach the base station synchronously.

Since the cells in the TA group respectively correspond to the same TA value, the cell may be any cell in the TA group. Preferably, in order to improve the success rate of the UE receiving the TA Command, the base station may select the cell with the best signal among all the cells in the TA group as the selected cell.

In the prior art, when the UE moves during use and the TA value of the TA group corresponding to the UE changes, the base station uses the TA command in the Medium Access Control (MAC) command to notify the UE to change the TA Value, carrying the TA group ID to be modified and the modified TA value information in the TA Command to notify the UE to change the TA value corresponding to the TA group ID. However, carrying the TA group ID that needs to be modified in the TA command will increase the signaling overhead. Moreover, the UE in the transmission mode of the old version of R8/9 cannot recognize the TA group identifier, resulting in poor backward compatibility of the solution.

In the method for updating the TA value in this embodiment, when the TA value of the TA group of the UE needs to be adjusted, a cell is selected from the TA group; a timing advance command is sent to the UE on the cell, and the TA command carries adjustment information; The TA command is used for the UE to modify the TA value of the TA group to which the cell belongs according to the adjustment information. Compared with the prior art, while effectively updating the TA value, the signaling overhead can be effectively saved. Moreover, by adopting the technical solution of this embodiment, there is no need to make any improvement to the UE, the backward compatibility is good, and the TA value in the UE can be effectively maintained.

It should be noted that, the TA group in the above embodiment may also include only one cell, and in this case, each cell corresponds to a TA value. At this time, the cell is the only cell included in the TA group.

It should be noted that, in the foregoing embodiment, the adjustment information includes an offset value of the TA value of the TA group or an adjusted TA value of the TA group. When the adjustment information is the offset value of the TA value of the TA group, the UE can obtain the corresponding TA value after adjustment of the TA group according to the offset value of the TA value of the TA group and the original TA value of the TA group. When the adjustment information is the adjusted TA value of the TA group, the UE can directly obtain the adjusted TA value of the TA group.

It should be noted that the TA group of the UE in the technical solutions of the above embodiments includes a UE-level TA group or may also be a cell-level TA group.

FIG. 2 is a flow chart of a method for updating a TA value provided by Embodiment 2 of the present invention. The processing method for updating the TA value in this embodiment is executed by a base station, such as an eNB. As shown in Figure 2, the update processing method of the TA value in this embodiment may specifically include the following steps:

Step 200, sending a configuration message to the UE, the configuration message carrying the identity of the added cell; the configuration message is used for the UE to configure the added cell for the UE according to the identity of the added cell;

Step 201, broadcast the identity of the TA group to which the added cell belongs in the system information of the added cell, so that the UE can obtain the identity of the TA group, and according to the identity of the TA group and the identity of the configured TA group of the UE, Obtain the TA value of the TA group to which the added cell belongs.

Specifically, when the base station receives the quality report information sent by the UE or decides to add a cell for the UE due to other reasons, the base station sends a configuration message to the UE to request the UE to set the second cell corresponding to the identity of the added cell as the UE cell, so that the added cell can serve the UE. In addition to setting some configuration parameters about the added cell in the UE according to the solution in the prior art, the UE also needs to record the identity of the added cell, for example, adding Record the ID of the added cell. In this way, the UE can know that the added cell can serve the UE. That is to say, the UE can receive the message sent by the base station on the corresponding cell according to the recorded added cell identifier, or send an uplink signal on the cell corresponding to the added cell identifier.

At the same time, the base station also broadcasts the identifier of the TA group to which the added cell belongs in the system message of the added cell. In this way, when the UE can receive the system information, and obtain the identifier of the TA group to which the added cell belongs. Then the UE can acquire the TA value of the TA group to which the added cell belongs according to the TA group identifier and the TA group to which the UE's joined cell belongs.

For example, when the identity of the TA group to which the added cell belongs is the same as the identity of the TA group already configured for the UE, it means that the newly added cell belongs to the TA group that the UE has already configured, and the TA value of the TA group to which the added cell belongs is the same as that of the UE already configured. The TA values of the configured TA groups are the same. When the TA group identifier of the added cell is different from the identifiers of all TA groups already configured by the UE, it means that the added cell belongs to a new TA group, and at this time, the UE can initiate random access on the added cell (RandomAccess; hereinafter referred to as RACH) process to request the base station to obtain the TA value of the TA group corresponding to the added cell.

The configuration message in this embodiment may specifically be a radio resource control (Radio Resource Control; hereinafter referred to as RRC) connection reconfiguration message in the LTE system.

In this embodiment, step 200 may be performed first and then step 201 is performed, or step 201 may be performed first and then step 200 is performed.

The TA value update processing method of this embodiment, when adding a cell for the UE, sends a configuration message to the UE, and broadcasts the identity of the TA group to which the added cell belongs in the system message of adding the cell, so that the UE can obtain the added The identity of the TA group to which the cell belongs, and according to the identity of the TA group to which the added cell belongs and the TA group that has been set as the cell to which the UE belongs, obtain the TA value of the TA group to which the added cell belongs. By adopting the technical solution of this embodiment, the TA value of the newly added cell can be effectively updated, which greatly facilitates the subsequent uplink signal sent according to the TA value to reach the base station.

In the prior art, the RRC connection reconfiguration cell of the newly added cell may also be used to carry the TA group identifier to which the newly added cell belongs, but this solution will increase signaling overhead. Compared with the existing solution, the technical solution of this embodiment can effectively save signaling overhead.

FIG. 3 is a flow chart of a method for updating a TA value provided by Embodiment 3 of the present invention. The processing method for updating the TA value in this embodiment is executed by a base station, such as an eNB. As shown in Figure 3, the update processing method of the TA value in this embodiment may specifically include:

Step 300, determining that the TA group to which the cell of the UE belongs is changed from the first TA group to the second TA group;

Step 301: Send a modification request message to the UE, the modification request message is for the UE to modify the TA group to which the cell belongs from the first TA group to the second TA group according to the modification request information; and obtain the TA value of the second TA group .

The application scenario of this embodiment may be that the TA group of the UE is a UE-level TA group.

The update processing method of the TA value in this embodiment can effectively realize that when the TA group of the UE changes, the changed TA value of the UE can be updated in a timely and accurate manner, which greatly facilitates the subsequent transmission based on the TA value. The uplink signal can reach the base station.

It should be noted that, in the above embodiment, the base station sends modification request information to the UE, and the modification request information carries the identifier of the cell and the identifier of the second TA group to which the cell belongs. Alternatively, the base station may also directly send modification request information to the UE on the cell. At this time, the modification request information does not need to carry the identity of the cell, and may only carry the identity of the second TA group to which the cell belongs. The modification request information in this embodiment is for the UE to modify the TA group to which the cell belongs from the first TA group to the second TA group. Specifically, the UE may change the identity of the TA group to which the cell belongs in the TA information table stored in the UE memory from the identity of the first TA group to the identity of the second TA group for the UE to use the TA for the cell. Manage group information.

For example, when the UE recognizes that the TA group of a cell has changed, for example, a cell belongs to TA group x, and has not passed through the repeater before but has passed through the repeater, then the cell cannot share TA with other cells in the same TA group before, so that the cell belongs to the same TA group TA group x becomes belonging to a new TA group y. At this time, the UE sends a quality detection report to the base station, and the base station sends a modification request message to the UE, specifically, it may also be called a TA group change command. In the LTE system, it can be a MAC command or an RRC message sent by the base station to the UE to notify the UE of changes in the TA group. Specifically, the TA group change command sent by the base station to the UE may carry the identity of the cell and the identity of the new TA group y to which the cell belongs, so that the UE can update the TA group corresponding to the cell to TA group Y. Or the base station specifically sends a TA group change command to the UE on the cell. At this time, the TA group change command may only carry the identifier of the new TA group y to which the cell belongs, so that the UE can transfer the TA group change command in the TA information table in the memory to the UE. The identifier of the TA group corresponding to the cell is updated to the identifier of TA group Y, so as to update the TA group corresponding to the cell.

FIG. 4 is a flow chart of a method for updating a TA value provided by Embodiment 4 of the present invention. As shown in FIG. 4 , the TA value update processing method in this embodiment is executed by the UE. The update processing method of the TA value in this embodiment may specifically include the following:

Step 400, receiving the TA Command sent by the base station on the cell in the TA group; the TA Command carries adjustment information;

Step 401: Modify the TA value of the TA group to which the cell belongs according to the adjustment information.

Specifically, the UE may modify the TA value of the TA group to which the cell belongs in the TA information table stored in the memory of the UE according to the adjustment information.

This embodiment describes the technical solution of the present invention on the UE side, which specifically corresponds to the technical solution described in the first embodiment above. For details, refer to the technical solution described in the first embodiment above, and details are not repeated here.

The update processing method of the TA value in this embodiment is to receive the TA Command sent by the base station on the cell in the TA group; the TA Command carries adjustment information; modify the TA value of the TA group to which the cell belongs according to the adjustment information. Compared with the technical solution of carrying the TA group identifier to be modified and the modified TA value information in the TA Command in the prior art, while effectively updating the TA value, the signaling overhead can be effectively saved. Moreover, by adopting the technical solution of this embodiment, there is no need to make any improvement to the UE, and the backward compatibility is better.

It should be noted that, in the foregoing embodiment, the cell may be any cell in the TA group. Preferably, in order to improve the success rate of the UE receiving the TA Command, the base station may select the cell with the best signal among all the cells in the TA group as the cell.

It should be noted that, in the above embodiment, the adjustment information is the offset value of the TA value of the TA group or the adjusted TA value of the TA group. When the adjustment information is the offset value of the TA value of the TA group, the UE can obtain the corresponding TA value after adjustment of the TA group according to the offset value of the TA value of the TA group and the original TA value of the TA group. When the adjustment information is the adjusted TA value of the TA group, the UE can directly obtain the adjusted TA value of the TA group.

It should be noted that the TA group of the UE in the technical solutions of the above embodiments is a UE-level TA group or may also be a cell-level TA group.

FIG. 5 is a flow chart of a method for updating a TA value provided by Embodiment 5 of the present invention. The TA value update processing method in this embodiment is executed by the UE. As shown in Figure 5, the update processing method of the TA value in this embodiment may specifically include the following:

Step 500, receiving a configuration message sent by the base station, the configuration message carrying the identity of the cell to be added;

The UE may configure the added cell according to the identifier of the added cell. The base station involved in this embodiment may be, for example, an eNB.

Step 501, receiving the system message of the added cell broadcast by the base station; the system message carries the identity of the TA group to which the added cell belongs;

Step 502: Acquire the TA value of the TA group to which the added cell belongs according to the TA group identifier and the configured TA group identifier of the UE.

The application scenario of this embodiment may be that the TA group of the UE is a cell-level TA group. This embodiment describes the technical solution of the present invention on the UE side, which specifically corresponds to the technical solution described in the above-mentioned embodiment 2. For details, refer to the technical solution described in the above-mentioned embodiment 2, and details are not repeated here.

The TA value update processing method of this embodiment can effectively update the TA value of the newly added cell, which greatly facilitates the subsequent uplink signal sent according to the TA value to reach the base station. Compared with the technical solution of carrying the TA group identifier to which the newly added cell belongs in the RRC connection reconfiguration cell in the prior art, the signaling overhead can be effectively saved.

Optionally, in the above embodiment, according to the identifier of the TA group and the identifier of the configured TA group of the UE, the TA value of the TA group to which the added cell belongs is obtained, which may specifically include the following:

(1) The UE judges whether the identity of the TA group corresponding to the added cell belongs to the identity of the TA group already configured by the UE; in one embodiment, when it belongs, step (2) is performed; in one embodiment, otherwise, When not belonging to, perform step (3);

(2) The TA value of the TA group configured by the UE is the TA value corresponding to the TA group to which the added cell belongs;

(3) Initiate a RACH procedure on the added cell to obtain the TA value of the TA group to which the added cell belongs from the base station.

Specifically, the UE judges whether the identifier of the TA group corresponding to the added cell belongs to the identifier of the TA group already configured by the UE, which may also be referred to as a procedure of judging whether RACH needs to be initiated. Before the added cell joins, the UE may have aggregated multiple cells, and these multiple cells have been configured as cells of the UE, and the multiple cells configured as the UE may belong to different TA groups. Here, it is judged whether the identifier of the TA group is the same as the identifier of the configured TA group for the UE. If they are the same, it means that the identity of the TA group to which the added cell belongs is the same as the identity of a certain TA group that the UE already exists, and has the same TA value. At this time, the UE does not need to initiate the RACH process. The TA value of the same TA group is the TA value of the second TA group. When the TA group identity of the added cell is different from the TA group identity already configured by the UE, the TA group to which the added cell belongs is a newly added TA group, and initiates a RACH process request to the base station to obtain the added TA group TA value of the TA group to which the cell belongs.

It should be noted that, between step 501 and step 502 in the above embodiment, or after step 502, may further include:

(a) The UE sets the cell corresponding to the identity of the added cell as the cell of the UE according to the configuration message in step 500;

(b) The UE sends an increase response message to the base station. Specifically, in the LTE system, it is the response information for the completion of RRC connection reconfiguration.

Specifically, when the UE sets the cell corresponding to the identity of the added cell as the cell of the UE, in addition to setting some configuration parameters about the added cell in the UE according to the solution in the prior art, the UE also needs to record the added The identification of the cell, for example, adding and recording the identification of the added cell in the TA information table stored in the memory of the UE. In this way, the UE can know that the added cell can serve the UE. That is to say, the UE can receive the message sent by the base station on the corresponding added cell according to the recorded added cell identifier, or send an uplink signal on the corresponding added cell based on the added cell identifier.

FIG. 6 is a flow chart of a method for updating a TA value provided by Embodiment 6 of the present invention. The TA value update processing method in this embodiment is executed by the UE. As shown in Figure 6, the update processing method of the TA value in this embodiment may specifically include the following:

Step 600, when the TA group to which the cell of the UE belongs changes, receive the modification request information sent by the base station;

Specifically, the modification request information is used to modify the TA group to which the cell belongs from the first TA group to the second TA group.

Step 601: Modify the TA group to which the first cell belongs from the first TA group to the second TA group according to the modification request information;

Step 602, acquire the TA value of the second TA group.

The application scenario of this embodiment may be that the TA group of the UE is a UE-level TA group. This embodiment describes the technical solution of the present invention on the UE side, which specifically corresponds to the technical solution described in the third embodiment above. For details, refer to the technical solution described in the third embodiment above, and details are not repeated here.

The update processing method of the TA value in this embodiment can effectively realize that when the TA group of the UE changes, the changed TA value of the UE can be updated in a timely and accurate manner, which greatly facilitates the subsequent transmission based on the TA value. The uplink signal can reach the base station.

It should be noted that, in the above embodiment, the UE receives the modification request information sent by the base station for modifying the TA group to which the cell belongs from the first TA group to the second TA group. Specifically, the UE receives the modification request information sent by the base station. Request information. At this time, the modification request information carries the identity of the first cell and the identity of the second TA group to which the updated cell belongs, and is used for the UE to change the TA group to which the cell corresponding to the cell identity belongs to the first TA group. The group is modified to belong to the second TA group; for example, the identifier of the TA group to which the first cell belongs in the TA information table stored in the memory of the UE may be modified to the identifier of the second TA group. Alternatively, the modification request information sent by the base station may also be received on the cell for the UE, where the modification request information carries the identifier of the second timing advance group to which the updated cell belongs. Since the UE receives the modification request information on the cell, the UE can know that the modification request information is used to modify the TA group to which the cell belongs, and specifically modify the TA group to which the cell belongs to the second TA group; The identifier of the TA group to which the cell belongs in the TA information table stored in is changed from the identifier of the first TA group to the identifier of the second TA group.

It should be noted that the above step 600 may also carry adjustment information at the same time, and the adjustment information is the TA offset value of the second TA group relative to the first TA group or the TA value of the second TA group. This may include the following steps:

(a) obtain the adjustment information from the modification request information;

(b) Obtain the TA value of the TA group according to the adjustment information.

For example, when the adjustment information is the TA offset value of the second TA group relative to the first TA group, according to the TA offset value of the second TA group relative to the first TA group and the TA value of the first TA group, then The TA value of the second TA group can be obtained. When the adjustment information is the TA value of the second TA group, the TA value of the second TA group can be obtained directly.

In an embodiment, when the above step 500 does not carry the adjustment information, or carries the adjustment information, the following steps may be included at this time: Initiate the RACH process in the cell to obtain the TA of the second TA group to which the cell belongs after the update value.

By adopting the above technical solution, when the TA group of the UE changes, the changed TA value of the UE can be updated timely and accurately, which greatly facilitates the subsequent uplink signal sent according to the TA value to reach the base station.

FIG. 7 is a schematic structural diagram of a communication system provided by Embodiment 7 of the present invention. As shown in Figure 7, the UE in this embodiment has four cells, where Cell1 and Cell2 share a TA value, and Cell1 and Cell2 belong to TA group1. Cell3 and Cell4 share the TA value, and Cell3 and Cell4 belong to TA group2. If the TA value of TA group2 changes, you can select a cell in cell3 and cell4 (for example, select cell3) and send a TA command for UE to modify the TA value of TA group2. The TA command carries the TA offset of TA group2 that needs to be modified. value, or directly carry the modified TA value of the TAgroup2. Here, the TA command carries the TA offset value of TA group2 that needs to be modified as an example. When the UE receives the TA command of the cell on Cell3, it modifies the TA value of the TA group to which Cell3 belongs according to the TA offset value in the TA command. That is, modify the TA values of all the cells under the TA group. As shown in Figure 6, when the UE receives the TA command on cell3, it modifies the TA value of TA group2, that is, modifies the TA values of cell3 and cell4.

By adopting the technical solution of the above embodiment, compared with the prior art, the overhead of the air interface is reduced, the current TA command structure does not need to be modified, and backward compatibility can be achieved.

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

FIG. 8 is a schematic structural diagram of a base station provided by Embodiment 8 of the present invention. As shown in FIG. 8 , the base station in this embodiment may specifically include: a selection module 10 and a sending module 11 .

The selection module 10 is used for selecting a cell from the TA group when the TA value of the UE's TA group needs to be adjusted. The sending module 11 is connected to the selection module 10, and the sending module 11 is used to send a TA command to the UE on the cell selected by the selection module 10, and the TA command carries adjustment information; the adjustment information is used for the UE to modify the TA according to the adjustment information The TA value of the group.

In the base station of this embodiment, the method for updating the TA value by using the above-mentioned modules is the same as the implementation mechanism of the above-mentioned related method embodiments. For details, reference may be made to the records of the above-mentioned related method embodiments, which will not be repeated here.

The base station of this embodiment, by using the above module, selects a cell from the TA group when the TA value of the TA group of the UE needs to be adjusted; sends a timing advance command to the UE on the cell, and the TA command carries adjustment information; The TA command is used for the UE to modify the TA value of the TA group to which the cell belongs according to the adjustment information. Compared with the prior art, while effectively updating the TA value, the signaling overhead can be effectively saved. Moreover, by adopting the technical solution of this embodiment, there is no need to make any improvement to the UE, the backward compatibility is good, and the TA value in the UE can be effectively maintained.

It should be noted that the selection module 10 in the above embodiment is specifically configured to select the cell with the best communication signal from the TA group as the cell when the TA value of the TA group of the UE needs to be adjusted.

For other structures and functions of the base station, reference may be made to the descriptions in the foregoing corresponding method embodiments.

FIG. 9 is a schematic structural diagram of a base station provided by Embodiment 9 of the present invention. As shown in FIG. 9 , the base station in this embodiment may specifically include: a sending module 20 and a broadcasting module 21 .

The sending module 20 is configured to send a configuration message to the UE, where the configuration message carries the ID of the added cell, for the UE to configure the added cell for the UE according to the ID of the added cell. The broadcast module 21 is used to broadcast the identity of the TA group to which the added cell belongs in the system message of the added cell, so that the UE can obtain the identity of the TA group, and according to the identity of the TA group and the identity of the configured TA group of the UE, , to obtain the TA value of the TA group to which the added cell belongs.

The TA group of the UE involved in this embodiment may be a cell-level TA group.

In the base station of this embodiment, the method for updating the TA value by using the above-mentioned modules is the same as the implementation mechanism of the above-mentioned related method embodiments. For details, reference may be made to the records of the above-mentioned related method embodiments, which will not be repeated here.

The base station in this embodiment, by using the above modules, sends a configuration message to the UE when adding a cell for the UE, and broadcasts the identity of the TA group to which the added cell belongs in the system message of adding the cell, so that the UE can obtain the added cell. The identity of the TA to which the cell belongs, and according to the identity of the TA group to which the added cell belongs and the identity of the configured TA group of the UE, obtain the TA value of the TA group to which the added cell belongs. By adopting the technical solution of this embodiment, the TA value of the newly added cell can be effectively updated, which greatly facilitates the subsequent uplink signal sent according to the TA value to reach the base station.

For other structures and functions of the base station, reference may be made to the descriptions in the foregoing corresponding method embodiments.

FIG. 10 is a schematic structural diagram of a base station provided by Embodiment 10 of the present invention. As shown in FIG. 10 , the base station in this embodiment may specifically include: a determining module 30 and a sending module 31 .

The determining module 30 is configured to determine that the TA group to which the cell of the UE belongs is changed from the first TA group to the second TA group. The sending module 31 is connected to the determining module 30, and the sending module 31 is configured to send a modification request message to the UE according to the result determined by the determining module 30, and the modification request message is used for the UE to select the TA group to which the cell belongs according to the modification request information. The first TA group is changed to the second TA group, and the TA value of the second TA group is obtained.

In the base station of this embodiment, the method for updating the TA value by using the above-mentioned modules is the same as the implementation mechanism of the above-mentioned related method embodiments. For details, reference may be made to the records of the above-mentioned related method embodiments, which will not be repeated here.

The base station of this embodiment can effectively update the changed TA value of the UE in a timely and accurate manner when the TA group of the UE changes by using the above modules, which greatly facilitates the subsequent uplink transmission based on the TA value. The signal is able to reach the base station.

It should be noted that the sending module 31 of this embodiment is configured to send a modification request message to the UE according to the result determined by the determining module 30, where the modification request message carries the identifier of the cell and the identifier of the second timing advance group; the modification request The information is used for the UE to modify the TA group to which the cell belongs from the first TA group to the second TA group according to the modification request message, and obtain the TA value of the second TA group.

Or the sending module 31 is specifically configured to send modification request information to the UE on the cell according to the result determined by the determining module 30, where the modification request information carries the identity of the second TA group; the modification request information is used by the UE according to the modification The request message modifies the TA group to which the cell belongs from the first TA group to the second TA group, and obtains the TA value of the second TA group.

For other structures and functions of the base station, reference may be made to the descriptions in the foregoing corresponding method embodiments.

FIG. 11 is a schematic structural diagram of a UE provided by Embodiment 11 of the present invention. As shown in FIG. 11 , the UE in this embodiment may specifically include: a receiving module 40 and a modifying module 41 .

The receiving module 40 is used to receive the TA command sent by the base station on the cells in the TA group; the TA command carries adjustment information. The modifying module 41 is connected with the receiving module 40, and the modifying module 41 is configured to modify the TA value of the TA group to which the cell belongs according to the adjustment information in the TA command received by the receiving module 40.

For the UE in this embodiment, the method for updating the TA value by using the above-mentioned modules is the same as the implementation mechanism of the above-mentioned related method embodiments. For details, reference may be made to the records of the above-mentioned related method embodiments, which will not be repeated here.

The UE in this embodiment implements receiving the TA Command sent by the base station on the cell in the TA group by using the above module; the TA Command carries adjustment information; and modifies the TA value of the TA group to which the cell belongs according to the adjustment information. Compared with the technical solution of carrying the TA group identifier to be modified and the modified TA value information in the TA Command in the prior art, while effectively updating the TA value, the signaling overhead can be effectively saved. Moreover, by adopting the technical solution of this embodiment, there is no need to make any improvement to the UE, and the backward compatibility is better.

For other structures and functions of the UE, reference may be made to the descriptions in the foregoing corresponding method embodiments.

FIG. 12 is a schematic structural diagram of a UE provided by Embodiment 12 of the present invention. As shown in FIG. 12 , the UE in this embodiment may specifically include: a receiving module 50 , a configuring module 51 and an acquiring module 52 .

The receiving module 50 is configured to receive the configuration message sent by the base station, and the configuration message carries the identity of the added cell. The configuration module 51 is connected to the receiving module 50, and the configuration module 51 is configured to configure the cell corresponding to the added cell identifier as the cell of the UE according to the configuration message received by the receiving module 50. The receiving module 50 is also configured to receive the system message of the added cell broadcast by the base station; the system message carries the identifier of the TA group to which the added cell belongs. The obtaining module 52 is connected with the receiving module 50, and the obtaining module 52 is used for obtaining the TA value of the TA group to which the added cell belongs according to the TA group identifier received by the receiving module 50 and the configured TA group identifier.

For the UE in this embodiment, the method for updating the TA value by using the above-mentioned modules is the same as the implementation mechanism of the above-mentioned related method embodiments. For details, reference may be made to the records of the above-mentioned related method embodiments, which will not be repeated here.

The UE in this embodiment can effectively update the TA value of the newly added cell by using the above module, which greatly facilitates the subsequent uplink signal sent according to the TA value to reach the base station.

It should be noted that the acquisition module 52 in the above embodiment is specifically used to determine that the TA group identifier received by the receiving module 50 is the identifier of the configured TA group, and use the TA value of the configured TA group as the TA value of the added cell. The TA value corresponding to the TA group; or, the acquiring module 52 determines that the identifier of the TA group received by the receiving module 50 is not the identifier of the already configured TA group, and initiates a random access process on the added cell to obtain the added cell from the base station. The TA value of the TA group.

The UE in this embodiment further includes a sending module, which is triggered by the configuration module 51 and configured to send a configuration response message to the base station after the configuration module 51 configures the cell corresponding to the added cell identifier as the cell of the UE.

For other structures and functions of the UE, reference may be made to the descriptions in the foregoing corresponding method embodiments.

FIG. 13 is a schematic structural diagram of a UE provided by Embodiment 13 of the present invention. As shown in FIG. 13 , the UE in this embodiment may specifically include: a receiving module 60 , a modifying module 61 and an acquiring module 62 .

The receiving module 60 is configured to receive modification request information sent by the base station for modifying the TA group to which the cell belongs from the first TA group to the second TA group when the TA group to which the cell of the UE belongs changes. The modifying module 61 is connected with the receiving module 60, and the modifying module 61 is configured to modify the TA group to which the cell belongs from the first TA group to the second TA group according to the modification request information received by the receiving module 60. The acquiring module 62 is connected to the modifying module 61 , and the acquiring module 62 is configured to acquire the TA value of the second TA group modified by the modifying module 61 .

For the UE in this embodiment, the method for updating the TA value by using the above-mentioned modules is the same as the implementation mechanism of the above-mentioned related method embodiments. For details, reference may be made to the records of the above-mentioned related method embodiments, which will not be repeated here.

The UE in this embodiment can effectively update the changed TA value of the UE in a timely and accurate manner when the TA group of the UE changes by using the above modules, which greatly facilitates the subsequent uplink transmission based on the TA value. The signal is able to reach the base station.

It should be noted that the receiving module 60 in the above embodiment is specifically configured to receive the modification request information sent by the base station when the TA group to which the cell of the UE belongs changes, and the modification request information carries the identity of the cell and the TA group to which the cell belongs The identity of the second TA group.

Or the receiving module 60 is specifically configured to receive, on the cell, the modification request information sent by the base station when the timing advance group to which the cell of the UE belongs changes, the modification request information carrying the identity of the second timing advance group to which the cell belongs .

It should be noted that the obtaining module 62 of the above embodiment is specifically configured to obtain the adjustment information from the modification request information when the modification request information received by the receiving module 60 also carries adjustment information; obtain the second TA according to the adjustment information. The TA value of the group.

It should be noted that the acquiring module 62 in the above embodiment is specifically configured to initiate a random access procedure on the cell to acquire the TA value of the second TA group to which the cell belongs from the base station.

For other structures and functions of the UE, reference may be made to the descriptions in the foregoing corresponding method embodiments.

FIG. 14 is a schematic structural diagram of a communication system provided by Embodiment 14 of the present invention. As shown in FIG. 14 , the communication system in this embodiment may specifically include: a base station 70 and a UE 71 .

The base station 70 is used to select a cell from the TA group when the TA value of the TA group of the UE71 needs to be adjusted; to send a TA command to the UE71 on the selected cell, and the TA command carries adjustment information. The UE71 is used to receive the TA command sent by the base station 70 on the cell; modify the TA value of the TA group to which the cell belongs according to the adjustment information.

The base station 70 and the UE 71 in the communication system of this embodiment may respectively adopt the base station and UE described in the above related embodiments. The implementation mechanism of the above-mentioned related method embodiments can be used to implement the updating process of the TA value. For details, reference can be made to the records of the above-mentioned related embodiments, which will not be repeated here.

The communication system of this embodiment can effectively realize that when the TA value of the UE's TA group is updated, the updated UE's TA value can be updated in a timely and accurate manner, which greatly facilitates the subsequent uplink transmission based on the TA value. The signal is able to reach the base station.

For other structures and functions of the system, reference may be made to the descriptions in the corresponding method embodiments above.

FIG. 15 is a schematic structural diagram of a communication system provided by Embodiment 15 of the present invention. As shown in FIG. 15 , the communication system in this embodiment may specifically include: a base station 80 and a UE 81 .

The base station 80 is configured to send a configuration message to the UE 81, the configuration message carrying the identity of the added cell; and broadcast the identity of the TA group to which the added cell belongs in the system message of the added cell. The UE81 is used to receive the configuration message sent by the base station 80; and receive the system message of the added cell broadcast by the base station 80; and obtain the TA of the TA group to which the added cell belongs according to the identifier of the TA group and the identifier of the configured TA group value.

The base station 80 and the UE 81 in the communication system of this embodiment may respectively adopt the base station and UE described in the above related embodiments. The implementation mechanism of the above-mentioned related method embodiments can be used to implement the updating process of the TA value. For details, reference can be made to the records of the above-mentioned related embodiments, which will not be repeated here.

The communication system of this embodiment can effectively realize that when a cell is added for the UE, the TA value of the TA group of the added cell can be updated in a timely and accurate manner, which greatly facilitates the subsequent uplink signal sent according to the TA value to reach base station.

For other structures and functions of the system, reference may be made to the descriptions in the corresponding method embodiments above.

FIG. 16 is a schematic structural diagram of a communication system provided by Embodiment 16 of the present invention. As shown in FIG. 16 , the communication system in this embodiment may specifically include: a base station 90 and a UE 91 .

The base station 90 is configured to determine that the timing advance group to which the cell of the UE91 belongs is changed from the first TA group to the second TA group; and send a modification request message to the UE91. The UE91 is used to receive the modification request information sent by the base station 90; and according to the modification request information, modify the TA group to which the cell belongs from the first TA group to the second TA group; obtain the TA value of the second TA group.

The base station 90 and the UE 91 in the communication system of this embodiment may respectively adopt the base station and UE described in the above-mentioned related embodiments. The implementation mechanism of the above-mentioned related method embodiments can be used to implement the updating process of the TA value. For details, reference can be made to the records of the above-mentioned related embodiments, which will not be repeated here.

The communication system of this embodiment can effectively realize that when the TA group of the UE is updated, the TA value of the updated TA group can be updated in a timely and accurate manner, which greatly facilitates subsequent uplink signals sent according to the TA value to be updated. Arrive at the base station.

For other structures and functions of the system, reference may be made to the descriptions in the corresponding method embodiments above.

The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place , or can also be distributed to at least two network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative efforts.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (38)

1. An update processing method of a timing advance value, characterized in that, comprising: When the timing advance value of the timing advance group of the user equipment needs to be adjusted, select a cell from the timing advance group; Sending a timing advance command to the user equipment on the cell, where the timing advance command carries adjustment information; the adjustment information is used for the user equipment to modify the timing advance of the timing advance group according to the adjustment information value. 2. The method according to claim 1, wherein selecting a cell from the timing advance group comprises: selecting a cell with the best communication signal from the timing advance group as the cell. 3. The method according to claim 1 or 2, wherein the adjustment information includes an offset value of the timing advance value of the timing advance group or an adjusted timing advance value of the timing advance group. 4. The method according to claim 1 or 2, wherein the timing advance group of the user equipment includes a user equipment level timing advance group or a cell level timing advance group. 5. A method for updating a timing advance value, characterized in that, comprising: Sending a configuration message to the user equipment, where the configuration message carries an identifier of the added cell, so that the user equipment can configure the added cell for the user equipment according to the identifier of the added cell; Broadcast the identity of the timing advance group to which the added cell belongs in the system message of the added cell, so that the user equipment can acquire the identity of the timing advance group, and according to the identity of the timing advance group and the The identifier of the configured timing advance group of the user equipment is used to obtain the timing advance value of the timing advance group to which the added cell belongs. 6. A method for updating a timing advance value, characterized in that it comprises: It is determined that the timing advance group to which the cell of the user equipment belongs is changed from the first timing advance group to the second timing advance group; sending a modification request message to the user equipment, where the modification request message is used by the user equipment to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information. Two timing advance groups, and acquire the timing advance value of the second timing advance group. 7. The method according to claim 6, wherein sending a modification request message to the user equipment comprises: Sending the modification request message to the user equipment, where the modification request message carries the identifier of the cell and the identifier of the second timing advance group. 8. The method according to claim 6, wherein sending a modification request message to the user equipment comprises: Sending the modification request information to the user equipment on the cell, where the modification request information carries the identifier of the second timing advance group. 9. A method for updating a timing advance value, comprising: receiving a timing advance command sent by the base station on a cell in the timing advance group, where the timing advance command carries adjustment information; modifying the timing advance value of the timing advance group to which the cell belongs according to the adjustment information. 10. The method of claim 9, wherein, The cell is the cell with the best communication signal in the timing advance group. 11. The method according to claim 9 or 10, wherein the adjustment information includes an offset value of the timing advance value of the timing advance group or an adjusted timing advance value of the timing advance group. 12. The method according to claim 9 or 10, wherein the timing advance group includes a user equipment level timing advance group or a cell level timing advance group. 13. A method for updating a timing advance value, comprising: receiving a configuration message sent by the base station, the configuration message carrying the identifier of the added cell, and configuring the added cell according to the identifier of the added cell; receiving a system message of the added cell broadcast by the base station, where the system message carries an identifier of a timing advance group to which the added cell belongs; Acquire the timing advance value of the timing advance group to which the added cell belongs according to the identifier of the timing advance group and the identifiers of the configured timing advance groups. 14. The method according to claim 13, wherein, according to the identifier of the timing advance group and the identifier of the configured timing advance group, obtaining the timing advance value of the timing advance group to which the added cell belongs includes : When the identifier of the timing advance group is the identifier of a configured timing advance group, using the timing advance value of the configured timing advance group as the timing advance value of the advanced timing group to which the added cell belongs; or, When the identifier of the timing advance group is not the identifier of an already configured timing advance group, initiate a random access procedure on the added cell to acquire the timing of the timing advance group to which the added cell belongs from the base station advance value. 15. The method according to claim 13 or 14, further comprising: Send a configuration response message to the base station. 16. A method for updating a timing advance value, comprising: When the timing advance group to which the cell belongs changes, receiving modification request information sent by the base station, where the modification request information is used to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group; Modifying the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information; Acquiring a timing advance value of the second timing advance group. 17. The method according to claim 16, wherein receiving the modification request information sent by the base station comprises: receiving the modification request information sent by the base station, where the modification request information carries the identifier of the cell and the identifier of the second timing advance group. 18. The method according to claim 16, wherein receiving the modification request information sent by the base station comprises: The modification request information sent by the base station is received in the cell, where the modification request information carries the identifier of the second timing advance group. 19. The method according to any one of claims 16-18, wherein the modification request information also carries adjustment information; Obtaining the timing advance value of the second timing advance group includes: obtaining the adjustment information from the modification request information; Acquiring a timing advance value of the second timing advance group according to the adjustment information. 20. The method according to claim 19, wherein the adjustment information is an offset value of the timing advance value of the second timing advance group relative to the first timing advance group or the second timing advance The timing advance value for the advance group. 21. The method according to any one of claims 16-18, wherein obtaining the timing advance value of the second timing advance group comprises: Initiating a random access procedure on the cell to obtain the timing advance value of the second timing advance group from the base station. 22. A base station, comprising: A selection module, configured to select a cell from the timing advance group when the timing advance value of the timing advance group of the user equipment needs to be adjusted; A sending module, configured to send a timing advance command to the user equipment on the cell selected by the selection module, where the timing advance command carries adjustment information; the adjustment information is used by the user equipment according to the The adjustment information modifies the timing advance value of the timing advance group. 23. The base station according to claim 22, wherein the selection module is specifically configured to select the best communication signal from the timing advance group when the timing advance value of the timing advance group of the user equipment needs to be adjusted. The cell of is used as the cell. 24. A base station, comprising: A sending module, configured to send a configuration message to the user equipment, where the configuration message carries an identifier of an added cell, so that the user equipment can configure the added cell for the user equipment according to the identifier of the added cell. District; A broadcasting module, configured to broadcast the identifier of the timing advance group to which the added cell belongs in the system message of the added cell, so that the user equipment can obtain the identifier of the timing advance group, and The identifier of the group and the identifier of the configured timing advance group of the user equipment, and obtain the timing advance value of the timing advance group to which the added cell belongs. 25. A base station, comprising: A determining module, configured to determine that the timing advance group to which the cell of the user equipment belongs is changed from the first timing advance group to the second timing advance group; A sending module, configured to send a modification request message to the user equipment according to the result determined by the determining module, the modification request message is used for the user equipment to advance the timing to which the cell belongs according to the modification request information The group is changed from the first timing advance group to the second timing advance group, and a timing advance value of the second timing advance group is acquired. 26. The base station according to claim 25, characterized in that, The sending module is specifically configured to send the modification request message to the user equipment according to the result determined by the determining module, where the modification request message carries the identifier of the cell and the ID of the second timing advance group The modification request information is used by the user equipment to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request message, and obtain the second timing advance group The timing advance value of the second timing advance group. 27. The base station according to claim 25, characterized in that, The sending module is specifically configured to send the modification request information to the user equipment on the cell according to the result determined by the determining module, where the modification request information carries the identifier of the second timing advance group The modification request information is used for the user equipment to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request message, and obtain the second timing advance group. The timing advance value of the timing advance group. 28. A user equipment, characterized by comprising: A receiving module, configured to receive a timing advance command sent by the base station on a cell in the timing advance group; the timing advance command carries adjustment information; A modifying module, configured to modify the timing advance value of the timing advance group to which the cell belongs according to the adjustment information in the timing advance command received by the receiving module. 29. A user equipment, characterized by comprising: A receiving module, configured to receive a configuration message sent by the base station, where the configuration message carries the identity of the added cell; A configuring module, configured to configure a cell corresponding to the added cell identifier as a cell of the user equipment according to the configuration message received by the receiving module; The receiving module is further configured to receive a system message of the added cell broadcast by the base station; the system message carries an identifier of a timing advance group to which the added cell belongs; An acquiring module, configured to acquire the timing advance value of the timing advance group to which the added cell belongs according to the identifier of the timing advance group received by the receiving module and the identifiers of already configured timing advance groups. 30. The user equipment of claim 29, wherein, The obtaining module is specifically configured to determine that the timing advance group identifier received by the receiving module is an identifier of an already configured timing advance group, and use the timing advance value of the configured timing advance group as the added The timing advance value corresponding to the timing advance group to which the cell belongs; or, determine that the identifier of the timing advance group received by the receiving module is not the identifier of the configured timing advance group, and initiate a random access process on the added cell The timing advance value of the timing advance group to which the added cell belongs is acquired from the base station. 31. A user equipment, characterized by comprising: A receiving module, configured to receive a modification request sent by the base station for modifying the timing advance group to which the aggregated cell belongs from the first timing advance group to the second timing advance group when the timing advance group to which the cell belongs changes information; A modification module, configured to modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information received by the receiving module; An obtaining module, configured to modify the timing advance group to which the cell belongs to the second timing advance group according to the modifying module, and obtain a timing advance value of the second timing advance group. 32. The user equipment according to claim 31, characterized in that, The receiving module is specifically configured to receive the modification request information sent by the base station when the timing advance group to which the cell belongs changes, and the modification request information carries the identity of the cell and the information to which the cell belongs. The ID of the second timing advance group. 33. The user equipment of claim 31 , wherein: The receiving module is specifically configured to receive, on the cell, the modification request information sent by the base station when the timing advance group to which the cell belongs changes, and the modification request information carries the second timing advance group to which the cell belongs. The ID of the timing advance group. 34. The user equipment according to any one of claims 31-33, wherein: The obtaining module is specifically configured to obtain the adjustment information from the modification request information when the modification request information received by the receiving module also carries adjustment information, and obtain the second adjustment information according to the adjustment information. The timing advance value of the timing advance group. 35. The user equipment according to any one of claims 31-33, wherein: The obtaining module is specifically configured to initiate a random access procedure on the cell to obtain the timing advance value of the second timing advance group to which the cell belongs from the base station. 36. A communication system, comprising: a base station and user equipment; The base station is configured to select a cell from the timing advance group when the timing advance value of the timing advance group of the user equipment needs to be adjusted; send a timing advance command to the user equipment on the cell, the Adjustment information is carried in the timing advance command; The user equipment is configured to receive the timing advance command sent by the base station on the cell, and modify the timing advance value of the timing advance group to which the cell belongs according to the adjustment information. 37. A communication system, comprising: a base station and user equipment; The base station is configured to send a configuration message to the user equipment, where the configuration message carries the identifier of the added cell, and broadcasts the information of the timing advance group to which the added cell belongs in the system message of the added cell logo; The user equipment is configured to receive the configuration message sent by the base station, and receive the system message of the added cell broadcast by the base station, according to the identifier of the timing advance group and the identifier of the configured timing advance group, Acquiring the timing advance value of the timing advance group to which the added cell belongs. 38. A communication system, comprising: a base station and user equipment; The base station is configured to determine that the timing advance group to which the cell of the user equipment belongs is changed from the first timing advance group to the second timing advance group; and send a modification request message to the user equipment; The user equipment is configured to receive modification request information sent by the base station, and modify the timing advance group to which the cell belongs from the first timing advance group to the second timing advance group according to the modification request information , and acquire the timing advance value of the second timing advance group.

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