CN104039007B - uplink synchronization processing method, user equipment and base station - Google Patents

Abstract

A method for processing uplink synchronization, user equipment and a base station are provided, the method comprising: receiving a component carrier (CC) uplink synchronization indication message sent by the base station, the uplink synchronization indication message carrying identification information of one or more newly configured CCs; When knowing that all or part of the newly configured CC or multiple CCs corresponding to the identification information need to perform uplink synchronization, send synchronization signaling to the base station; and receive a timing advance sent by the base station according to the synchronization signaling (TA) adjustment message, and apply the TA value carried in the TA adjustment message to the CC that needs to perform uplink synchronization. When the base station needs to configure a new CC for the user equipment, or one or some CCs being used by the user equipment need to be replaced by a newly configured CC, the user equipment in the present invention can use the obtained TA value to uplink the new configuration CC.

Description

Uplink synchronization processing method, user equipment and base station

technical field

The present invention relates to the communication field, in particular to an uplink synchronization processing method, user equipment and a base station.

Background technique

A Long Term Evolved-Advanced (LTE-A for short) system needs to support a wider bandwidth than an LTE system, so multiple carriers can be aggregated. The so-called carrier aggregation is to aggregate multiple component carriers (hereinafter referred to as: CC) into one carrier with a bandwidth higher than that of the LTE system, so as to support high-speed data rates.

In the prior art, when a user equipment (User Equipment, hereinafter referred to as: UE) uses multiple CCs, in some scenarios, the timing advance (Time Advanced, hereinafter referred to as: TA value) of each CC is different . For example, when the base station configures different CCs on different repeaters, or CCs of different frequencies pass through different scattering paths, the TA values of different CCs are different. For another example, when the UE uses two different CCs to communicate with two non-cooperative access points, the TA values of the two CCs are different.

Therefore, when the UE uses multiple CCs with different TA values, if the base station needs to configure a new CC for the UE, or one or some CCs that the UE is using need to be replaced by a newly configured CC, how does the UE communicate with the CC? Uplink synchronization of newly configured CCs has become an urgent problem to be solved.

Contents of the invention

Embodiments of the present invention provide an uplink synchronization processing method, user equipment and a base station, so as to solve the problem of how the UE achieves uplink synchronization with a newly configured CC.

To achieve the above purpose, an embodiment of the present invention provides an uplink synchronization processing method, including:

receiving an uplink synchronization indication message sent by the base station, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs;

When it is learned that a newly configured CC corresponding to the identification information, or all or some of the multiple CCs need to perform uplink synchronization, send synchronization signaling to the base station; and

receiving the timing advance TA adjustment message sent by the base station according to the synchronization signaling, and applying the TA value carried in the TA adjustment message to the CC that needs to perform uplink synchronization.

An embodiment of the present invention provides an uplink synchronization processing method, including:

Sending an uplink synchronization indication message to the user equipment UE, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs;

receiving the synchronization signaling sent by the UE;

Sending a timing advance TA adjustment message to the UE according to the synchronization signaling, so as to instruct the UE to apply the TA value carried in the TA adjustment message to the CC that needs to perform uplink synchronization.

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

The first receiving module is configured to receive an uplink synchronization indication message sent by the base station, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs;

The first sending module is configured to send synchronization signaling to the base station when it is known that a newly configured CC corresponding to the identification information, or all or some of the CCs need to perform uplink synchronization;

The first processing module is configured to, after the first receiving module receives the timing advance TA adjustment message sent by the base station according to the synchronization signaling, apply the TA value carried in the TA adjustment message to the device that needs to perform uplink synchronization on CC.

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

The second sending module is configured to send an uplink synchronization indication message to the user equipment UE, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs;

The second receiving module is configured to receive the synchronization signaling sent by the UE;

The second sending module is further configured to send a timing advance TA adjustment message to the UE according to the synchronization signaling, so as to instruct the UE to apply the TA value carried in the TA adjustment message to the UE that needs to perform uplink synchronization. on CC.

In the above embodiments of the present invention, when the base station needs to configure a new CC for the UE, or one or some CCs that the UE is using need to be replaced by a newly configured CC, the UE can use the acquired TA value and the newly configured CC Uplink synchronization is achieved, and in this process, the UE is only triggered to perform uplink synchronization through the uplink synchronization indication message, thereby saving downlink wireless resources. When the UE needs to perform uplink synchronization, it can obtain the new The TA value that needs to be used on the configured CC, thus improving the uplink synchronization speed.

An embodiment of the present invention provides another uplink synchronization processing method, including:

receiving an uplink synchronization indication message sent by the base station, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs;

If it is known according to the identification information of the CCs that the newly configured one or more CCs do not belong to the same CC group as the currently used CC, perform uplink synchronization on the newly configured one or more CCs, wherein the A CC group is a CC group composed of one or more CCs sharing the same timing advance TA value.

An embodiment of the present invention provides another uplink synchronization processing method, including:

Send CC group information to the UE by broadcasting or dedicated signaling, where the CC group information is used to indicate that CCs in the same CC group share a timing advance TA value;

Sending an uplink synchronization indication message to the user equipment UE, where the uplink synchronization indication message carries identification information of one or more newly configured CCs, so that the UE learns the newly configured one or more CCs according to the identification information of the CCs. When a CC does not belong to the same CC group as the currently used CC, perform uplink synchronization on the newly configured one or more CCs.

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

A third receiving module, configured to receive an uplink synchronization indication message sent by the base station, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs;

The third processing module is configured to execute on the newly configured one or more CCs when it is known according to the identification information of the CCs that the newly configured one or more CCs do not belong to the same CC group as the currently used CC. Uplink synchronization, wherein the CC group is a CC group composed of one or more CCs sharing the same TA value.

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

A third sending module, configured to send CC group information to the UE through broadcast or dedicated signaling, where the CC group information is used to indicate that CCs in the same CC group share a timing advance TA value;

A fourth sending module, configured to send an uplink synchronization indication message to the UE, where the uplink synchronization indication message carries identification information of one or more newly configured CCs, so that the UE learns the new CC information according to the identification information of the CCs. When the configured one or more CCs do not belong to the same CC group as the currently used CC, perform uplink synchronization on the newly configured one or more CCs.

In the above embodiments of the present invention, in the case of CC grouping, the UE can know whether the newly configured CC belongs to a certain CC group according to the CC group information and the newly configured identification information, and directly use the CC group if it belongs to a certain CC group. The TA corresponding to the CC group realizes uplink synchronization. When it does not belong to a certain CC group, it can initiate an uplink synchronization operation to the base station, so as to obtain the TA value used on the newly configured CC from the base station. Therefore, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by a newly configured CC, the UE and the newly configured CC can achieve uplink synchronization.

The embodiment of the present invention also provides an uplink synchronization processing method, including:

Obtain the downlink timing value T1 of the component carrier CC or CC pair being used, the uplink timing advance TA1, and the downlink timing value T2 of the newly configured CC or CC pair;

Apply the formula (2) to calculate the uplink timing advance TA2 of the newly configured CC,

TA2＝TA1+2×(T2－T1) (2);

Apply the obtained TA2 to the newly configured CC.

In the above embodiments of the present invention, the UE can adjust the TA status of the newly configured CC by itself according to the TA value of the configured CC. No matter whether multiple CCs share TA, the UE can adjust the downlink timing advance and The uplink timing advance and the downlink timing advance of the newly configured CC are used to calculate the uplink timing advance of the newly configured CC. In this embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by a newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

FIG. 1 is a flowchart of Embodiment 1 of an uplink synchronization processing method according to the present invention;

FIG. 2 is a flow chart of Embodiment 2 of the uplink synchronization processing method of the present invention;

FIG. 3 is a flow chart of Embodiment 3 of the uplink synchronization processing method of the present invention;

FIG. 4 is a schematic structural diagram of a TA adjustment command in Embodiment 3 of the uplink synchronization processing method of the present invention;

FIG. 5 is a flowchart of Embodiment 4 of the uplink synchronization processing method of the present invention;

FIG. 6 is a flowchart of Embodiment 5 of the uplink synchronization processing method of the present invention;

FIG. 7 is a flow chart of Embodiment 6 of the uplink synchronization processing method of the present invention;

FIG. 8 is a flowchart of Embodiment 7 of the uplink synchronization processing method of the present invention;

FIG. 9 is a flow chart of Embodiment 8 of the uplink synchronization processing method of the present invention;

FIG. 10 is a flow chart of Embodiment 9 of the uplink synchronization processing method of the present invention

FIG. 11 is a flowchart of Embodiment 10 of an uplink synchronization processing method according to the present invention;

FIG. 12 is a schematic structural diagram of Embodiment 1 of a user equipment according to the present invention;

FIG. 13 is a schematic structural diagram of Embodiment 1 of a base station according to the present invention;

FIG. 14 is a schematic structural diagram of Embodiment 2 of the user equipment of the present invention;

FIG. 15 is a schematic structural diagram of Embodiment 2 of the base station of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.

FIG. 1 is a flow chart of Embodiment 1 of the uplink synchronization processing method of the present invention. As shown in FIG. 1, the method of this embodiment may include:

Step 101, receiving an uplink synchronization indication message sent by the base station;

The uplink synchronization indication message carries identification information of one or more newly configured CCs.

For example, the uplink synchronization indication message may be a CC reconfiguration message or (Physics Downlink Control Channel, hereinafter referred to as: PDCCH);

Wherein, the uplink synchronization indication message carries the identification information of one or more newly configured CCs, and the identification information is used by the base station, such as eNodeB, to indicate which CC or several CCs are newly configured for the UE, or, for the FDD system, when When the eNodeB performs CC reconfiguration in pairs, the CC identification information can also represent one or more pairs of uplink and downlink CCs. The so-called paired CC reconfiguration means that the eNodeB notifies the configuration of an uplink CC and a downlink CC. An uplink CC and a downlink CC form a CC pair. In this case, the identification information of the CC can be the identification information of the CC pair. The meaning of the CC identification information in other embodiments is the same as other ones. Therefore, in other embodiments of the present invention Parts are no longer specified.

It should be noted that the CC reconfiguration message may also carry detailed configuration information of the newly configured CC.

In this embodiment, the uplink synchronization indication message may be sent as an independent radio resource control (RadioResource Control, hereinafter referred to as: RRC) message or a medium access control protocol data unit (Medium AccessControl Protocol Data Unit, hereinafter referred to as: MAC PDU) , or be embedded in the RRC connection reconfiguration message and sent.

Step 102: When it is known from the uplink synchronization indication message that all or some of the newly configured CCs or multiple CCs need to perform uplink synchronization, send a synchronization signaling to the base station;

After receiving the uplink synchronization indication message, such as a CC reconfiguration message or PDCCH, the UE can not only know which CC or several CCs are newly configured, but also know whether it needs to communicate with the newly configured CC or multiple CCs. All or some CCs perform uplink synchronization.

The synchronization signaling is a synchronization sequence. For example, the synchronization signaling in this embodiment may be a dedicated preamble (preamble) or a sounding reference signal (Sounding reference signal, hereinafter referred to as SoundingRS). If the UE is required to perform uplink synchronization, the CC reconfiguration message or the PDCCH may contain a dedicated preamble allocated for the UE. In addition, the dedicated preamble indicates whether the UE needs to perform uplink synchronization on one or more newly configured CCs. The way can be:

1. Explicit indication: that is, use dedicated bit indication information in the CC reconfiguration message or PDCCH to indicate whether the UE needs to perform uplink synchronization on one CC or all or part of multiple CCs;

2. Implicit indication: If the CC reconfiguration message or the PDCCH contains the allocation information of the dedicated preamble, it means that the UE needs to perform uplink synchronization on all or some CCs in one CC or multiple CCs. If there is no allocation information of the dedicated preamble, then Indicates that the UE may not perform uplink synchronization; that is, the UE may judge the CC reconfiguration message or PDCCH, and if it contains a dedicated preamble, use the preamble to perform uplink synchronization.

Therefore, learning in step 102 according to the uplink synchronization indication message that all or some of the newly configured CCs or multiple CCs need to perform uplink synchronization may include:

According to the bit indication information used to indicate whether to perform uplink synchronization on all or part of the newly configured CC or CCs in the uplink synchronization indication message, it is known that the newly configured CC or CCs need to perform Perform uplink synchronization on all or some CCs; or

According to the allocation information including the dedicated preamble in the uplink synchronization indication message, it is known that uplink synchronization needs to be performed on all or some of the newly configured CCs or CCs.

Therefore, when the UE determines that uplink synchronization needs to be performed according to the uplink synchronization indication message, it can obtain the corresponding dedicated preamble from the uplink synchronization indication message, and when performing uplink synchronization, it can send the dedicated preamble to the base station to request the base station according to This dedicated preamble indicates the TA values that can be used.

Step 103: Receive the TA adjustment message sent by the base station according to the synchronization signaling, and apply the TA value carried in the TA adjustment message to the CC that needs to perform uplink synchronization.

After receiving the dedicated preamble sent by the UE, the base station can send a TA adjustment message to the UE. The TA adjustment message can carry a TA value that needs to be applied to the newly configured CC that needs to perform uplink synchronization.

In specific implementation, the UE can apply the formula (1) to calculate and obtain the TA _new required on the CC that needs to perform uplink synchronization, and apply the TA _new to the CC,

TA _new = TA _reference + (TA-M) × Ts (1)

Among them, the TA _reference indicates the TA value on the currently used CC, the reference value sent by the base station in the uplink synchronization indication message, or the TA value on the CC when the RRC connection is established for the first time, or the main carrier (anchor CC ) on the TA value; M is the preset empirical value; T _S =1/(15000×2048).

So far, the UE can use the TA _new on the CC that needs to perform uplink synchronization, so that when the base station needs to configure a new CC for the UE, or one or some CCs that the UE is using need to be replaced by a newly configured CC, The UE can use the TA _new to achieve uplink synchronization with the newly configured CC, and in this process, the UE is only triggered to perform uplink synchronization through the uplink synchronization indication message, thereby saving downlink radio resources. When the UE needs to perform uplink synchronization, it can pass to The base station sends synchronization signaling, such as a dedicated preamble, to obtain the TA value to be used on the newly configured CC from the base station, thereby increasing the uplink synchronization speed.

In another embodiment of the uplink synchronization processing method of the present invention, when it is known from the uplink synchronization indication message that uplink synchronization does not need to be performed on all or part of the newly configured CC or multiple CCs, the uplink The TA value indicated in the synchronization indication message is applied to the newly configured CCs that do not need to perform uplink synchronization; or it is learned from the uplink synchronization indication message that all or some CCs in the newly configured CC or multiple CCs are not When uplink synchronization needs to be performed, the unique TA value on the currently used CC is applied to all or some of the newly configured CCs that do not need to perform uplink synchronization.

Knowing according to the uplink synchronization indication message that all or some of the newly configured CCs or multiple CCs do not need to perform uplink synchronization may include:

When a newly configured CC has the same TA value as any one of the currently used one or more CCs, the indicated TA value includes: the newly configured TA value that needs to be adjusted on a CC, or the TA value currently in use Identity information of the CC, where the identity information of the CC indicates that the TA value to be used on the newly configured CC is the same as the TA value of the CC corresponding to the identity information of the CC;

When the newly configured multiple CCs have the same TA value as the currently used CC, the indicated TA value includes: the TA value corresponding to the multiple newly configured CCs, the TA value corresponding to the multiple newly configured CCs The number of the value, or the number of the currently used CC, the TA value required for the newly configured CC is the same as the TA value of the CC corresponding to the CC number.

Specifically, if the UE is not required to perform uplink synchronization, the base station can indicate the TA value that can be used for the UE, and the specific method can be:

When the UE is currently only configured to use one CC or the TA values of multiple CCs being used are the same, it indicates whether the UE can use the currently used TA value;

Or when the UE is currently configured to use multiple CCs and the UE is using multiple different TA values, it indicates the TA value that the UE should use on the newly configured CC. In this case, the base station can either directly notify the UE of the TA value that the UE needs to use, or number the TA value that the UE is currently using, and notify the UE of the number of the TA value that needs to be used on the newly configured CC, Alternatively, the UE may be notified of the number of a certain CC being used, and when the UE receives the number information of the CC, it means that the newly configured CC can use the TA value on the CC corresponding to the number.

In another case, when it is known from the uplink synchronization indication message that uplink synchronization does not need to be performed on all or some of the newly configured CCs or multiple CCs, the unique TA value on the currently used CC , applied to CCs that do not need to perform uplink synchronization among one or more newly configured CCs. Specifically, the UE and the base station can know in advance that the TA values of all CCs currently used by the UE are the same, that is, all CCs use a unique TA value. At this time, the base station does not need to specifically indicate the TA value for the UE. When the UE receives the uplink synchronization After the indication message, when it is learned that all or some of the newly configured CCs or multiple CCs do not need to perform uplink synchronization, they can directly apply the unique TA value of the currently used CC to the newly configured CCs that do not need to perform uplink synchronization. Sync on CC.

Therefore, when the UE knows that it does not need to perform uplink synchronization according to the received uplink synchronization indication message, it can directly apply the TA value indicated in the uplink synchronization indication message to the newly configured CCs that do not need to perform uplink synchronization, or directly The unique TA value of the currently used CC is applied to the newly configured CC that does not need to perform uplink synchronization, so that the UE can also achieve uplink synchronization with the newly configured CC when it does not need to perform uplink synchronization.

FIG. 2 is a flow chart of Embodiment 2 of the uplink synchronization processing method of the present invention. As shown in FIG. 2, the method of this embodiment may include:

Step 201, sending an uplink synchronization indication message to the user equipment UE;

The uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs.

For example, the uplink synchronization indication message may be a CC reconfiguration message or a PDCCH;

The uplink synchronization indication message can be sent as an independent RRC message or MAC PDU, or embedded in an RRC connection reconfiguration message.

Specifically, when the UE is required to perform uplink synchronization, the uplink synchronization indication message may include a dedicated preamble or Sounding RS allocated for the UE, and the dedicated preamble or Sounding RS indicates whether the UE needs to be in one or more newly configured The manner of performing uplink synchronization on each CC may adopt the above-mentioned explicit indication or implicit indication, which will not be repeated here.

Therefore, the sending the uplink synchronization indication message to the UE in step 201 may include: sending an extended TA value adjustment command to the UE; correspondingly, the method further includes: sending a CC reconfiguration message to the UE, so that The UE obtains configuration information of the CC corresponding to the identification information according to the CC reconfiguration message; or

It may include: sending a CC reconfiguration message to the UE, the CC reconfiguration message contains the TA value that the UE needs to adjust on a newly configured CC, or the CC reconfiguration message contains One or more TA values that need to be adjusted, and the identification information of the CC corresponding to each TA value.

Step 202: After the UE learns from the uplink synchronization indication message that all or some of the newly configured CCs or multiple CCs need to perform uplink synchronization, receive the synchronization signaling sent by the UE;

When the UE judges that uplink synchronization needs to be performed according to the uplink synchronization indication message, it can obtain the corresponding dedicated preamble or Sounding RS from the uplink synchronization indication message, and can send the dedicated preamble or Sounding RS to the base station when performing uplink synchronization, The base station can indicate the TA value that the UE can use according to the dedicated preamble or Sounding RS.

Because the base station can configure a new CC for the UE according to bandwidth requirements, and can also newly configure multiple CCs or multiple CC groups for the UE (one uplink CC and one downlink CC can be called a CC group). For the case of newly configuring multiple CCs or multiple CC groups, the base station can only allocate one dedicated preamble to the UE, that is, this dedicated preamble is shared by multiple CCs; of course, multiple preambles can also be allocated to the UE. Therefore, receiving the dedicated preamble sent by the UE described in step 202 may include: receiving a dedicated preamble sent by the UE, and the dedicated preamble needs to perform uplink synchronization in multiple newly configured CCs or receive multiple dedicated preambles sent by the UE, where the multiple dedicated preambles are sent on all or some of the newly configured CCs that need to perform uplink synchronization.

Step 203: Send a timing advance TA adjustment message to the UE according to the synchronization signaling, so that the UE applies the TA value carried in the TA adjustment message to the CC that needs to perform uplink synchronization.

Taking the dedicated preamble for synchronization signaling as an example, after receiving the dedicated preamble sent by the UE, the base station can send a TA adjustment message to the UE. The TA adjustment message can carry the newly configured CC that needs to be applied to perform uplink synchronization. TA value on.

Sending the TA adjustment message to the UE may include: sending an extended TA value adjustment command to the UE, where the extended TA value adjustment command includes the TA value that the UE needs to adjust on a newly configured CC, or the The extended TA value adjustment command includes one or more TA values that the UE needs to adjust on multiple newly configured CCs, and identification information of CCs corresponding to each TA value.

In specific implementation, the UE can apply the formula (1) to calculate and obtain the TA _new required on the CC that needs to perform uplink synchronization, and apply the TA _new to the CC,

So far, the UE can use the TA _new on the CC that needs to perform uplink synchronization, so that when the base station needs to configure a new CC for the UE, or one or some CCs that the UE is using need to be replaced by a newly configured CC, The UE can use the TA _new to achieve uplink synchronization with the newly configured CC, and in this process, the UE is only triggered to perform uplink synchronization through the uplink synchronization indication message, thereby saving downlink radio resources. When the UE needs to perform uplink synchronization, it can pass to The base station sends synchronization signaling, such as a dedicated preamble, to obtain the TA value to be used on the newly configured CC from the base station, thereby increasing the uplink synchronization speed.

In another embodiment of the uplink synchronization processing method of the present invention, when the base station does not require the UE to perform uplink synchronization, the following methods may be adopted:

Send an uplink synchronization indication message carrying an indicated TA value to the UE. When a newly configured CC has the same TA value as any one of one or more currently used CCs, the indicated TA value may include: The TA value that needs to be adjusted on a newly configured CC, or the identification information of the CC that is currently in use. The identification information of the CC indicates that the TA value that needs to be used on the newly configured CC corresponds to the CC identification information. TA value is the same;

When the newly configured multiple CCs have the same TA value as the currently used CC, the indicated TA value may include: the TA values corresponding to the multiple newly configured CCs, the TA values corresponding to the multiple newly configured CCs The number of the TA value, or the number of the currently used CC, and the TA value to be used by the newly configured CC is the same as the TA value of the CC corresponding to the CC number.

Specifically, if the UE is not required to perform uplink synchronization, the base station can indicate the TA value that can be used for the UE, and the specific method can be:

When the UE is currently only configured to use one CC or the TA values of the multiple CCs being used are the same, it indicates whether the UE can use the currently used TA value;

Or when the UE is currently configured to use multiple CCs and the UE is using multiple different TA values, it indicates the TA value that the UE should use on the newly configured CC. In this case, the base station can either directly notify the UE of the TA value that the UE needs to use, or number the TA value that the UE is currently using, and notify the UE of the number of the TA value that needs to be used on the newly configured CC, Alternatively, the UE may be notified of the number of a certain CC being used, and when the UE receives the number information of the CC, it means that the newly configured CC can use the TA value on the CC corresponding to the number.

In another case, when it is known from the uplink synchronization indication message that uplink synchronization does not need to be performed on all or some of the newly configured CCs or multiple CCs, the unique TA value on the currently used CC Apply all or some CCs that do not need to perform uplink synchronization in one or more newly configured CCs. Specifically, the UE and the base station can know in advance that the TA values of all CCs currently used by the UE are the same, that is, all CCs use a unique TA value. At this time, the base station does not need to specifically indicate the TA value for the UE. When the UE receives the uplink synchronization After the indication message, when it is learned that all or some of the newly configured CCs or multiple CCs do not need to perform uplink synchronization, they can directly apply the unique TA value of the currently used CC to the newly configured CCs that do not need to perform uplink synchronization. Sync on CC.

Therefore, when the UE knows that it does not need to perform uplink synchronization according to the received uplink synchronization indication message, it can directly apply the TA value indicated in the uplink synchronization indication message to the newly configured CCs that do not need to perform uplink synchronization, or directly The unique TA value of the currently used CC is applied to the newly configured CC that does not need to perform uplink synchronization, so that the UE can also achieve uplink synchronization with the newly configured CC when it does not need to perform uplink synchronization.

The above-mentioned embodiments will be described in detail below using several specific embodiments, and the following several embodiments will be described by taking the synchronization signaling as a dedicated preamble as an example.

FIG. 3 is a flow chart of Embodiment 3 of the uplink synchronization processing method of the present invention. As shown in FIG. 3 , the method of this embodiment may include:

Step 301a, the base station sends a CC reconfiguration message to the UE;

The CC reconfiguration message carries identification information of one or more newly configured CCs, and the identification information is used by the base station to indicate to the UE which CC or several CCs are newly configured. The CC reconfiguration message may also carry detailed configuration information of the newly configured CC.

After receiving the CC reconfiguration message, the UE can not only know which CC or several CCs are newly configured, but also know whether all or some of the newly configured CCs or CCs need to perform uplink synchronization.

Step 302a, the UE judges whether it is necessary to perform uplink synchronization according to the CC reconfiguration message, if so, execute step 303a, otherwise execute step 304a;

Specifically, when the UE is required to perform uplink synchronization, the CC reconfiguration message includes a dedicated preamble allocated for the UE.

When the UE is not required to perform uplink synchronization, the TA value that can be used is indicated for the UE. The specific manner has been described in the foregoing embodiments and will not be repeated here.

After the UE receives the CC reconfiguration message, if the CC reconfiguration message indicates a dedicated preamble, it means that the UE needs to perform uplink synchronization on a newly configured CC or some or all of the CCs. If the CC reconfiguration If the message indicates the relevant information of the TA, the UE does not need to perform uplink synchronization, and can directly implement uplink synchronization with the newly configured CC according to the relevant information of the TA.

Step 303a, the UE sends the dedicated preamble to the base station, and executes step 305a;

In this embodiment, the base station can configure a new CC for the UE according to bandwidth requirements, or configure multiple CCs or multiple CC pairs for the UE (one uplink CC and one downlink CC can be called a CC pair) . For the case of newly configuring multiple CCs or multiple CC pairs, the base station may only allocate one dedicated preamble to the UE, that is, the dedicated preamble is shared by multiple CCs; of course, multiple preambles may also be allocated to the UE.

After receiving the CC reconfiguration message sent by the base station, the UE can send the dedicated preamble indicated in the CC reconfiguration message to the base station when it knows that uplink synchronization needs to be performed, so that the base station can feed back the TA to the UE according to the dedicated preamble value.

In step 304a, the UE applies the TA value indicated in the CC reconfiguration message to the newly configured CC that does not need to perform uplink synchronization.

Step 305a, the base station sends an extended TA adjustment command to the UE.

The extended TA adjustment command may include the identification information of the CC corresponding to the TA value. If there is only one or a pair of newly configured CCs, or when only one or a pair of newly configured CCs need to perform uplink synchronization, the identification information of the CC may not be included, and the TA adjustment is the default The command is the TA adjustment corresponding to the newly configured CC. Then, the UE applies the TA value to the newly configured CCs that need to perform uplink synchronization.

For example, the extended TA adjustment command can be a MAC PDU. FIG. 4 is a schematic structural diagram of the TA adjustment command in Embodiment 3 of the uplink synchronization processing method of the present invention. As shown in FIG. 4 , the identification information of the CC, that is, the CC The number of bits of the index is 2-3 bits, and the number of bits occupied by the extended TA adjustment command extent TA command may be 5-6 bits, or may occupy more bits. In order to distinguish the MAC PDU in this embodiment from other MAC PDUs received by the UE, the MAC PDU in this embodiment can use the logical channel reserved by the current LTE system to send the MAC PDU of the extended TA adjustment command, for example, the index number can be used As the logical channel of 11011, logical channels reserved by other LTE systems can of course also be used.

In step 306a, the UE applies the TA value carried in the extended TA adjustment command to the CC that needs to perform uplink synchronization.

For example, the UE may use formula (1) to calculate the TA value, or the calculation method of TA may also be: TA _new =TA×Ts.

In addition, in this embodiment, when the base station newly configures multiple CCs that need to perform uplink synchronization for the UE in the CC reconfiguration message, the base station can explicitly notify the UE in the CC reconfiguration message on which CC the UE should receive The above TA adjustment command. That is, when the base station sends a CC reconfiguration message to the UE, it indicates the identity information of the CC used to receive the TA adjustment command to the UE. Alternatively, the base station may also use dedicated RRC signaling or MAC PDU or physical layer signaling to notify the UE of the identity information of the CC receiving the TA adjustment command. In other embodiments of the present invention, the method for receiving the TA adjustment command may use the above method, so the description will not be repeated in other parts of the present invention.

So far, the UE can use the TA _new on the CC that needs to perform uplink synchronization, so that when the base station needs to configure a new CC for the UE, or one or some CCs that the UE is using need to be replaced by a newly configured CC, The UE can use the TA _new to achieve uplink synchronization with the newly configured CC, and in this process, the UE is only triggered to perform uplink synchronization through the uplink synchronization indication message, thereby saving downlink radio resources. When the UE needs to perform uplink synchronization, it can pass to The base station sends a dedicated preamble to obtain the TA value to be used on the newly configured CC from the base station, thereby improving the uplink synchronization speed.

In addition, in this embodiment, when the UE is using multiple component carriers for communication, when the base station needs the UE to accurately adjust the current TA value on the multiple component carriers being used, the method described in step 305a can also be used. , that is, the extended TA adjustment command MAC PDU shown in Figure 4. That is, when the base station needs to precisely adjust the TA values of multiple component carriers being used by the UE, it can send the extended TA adjustment command MAC PDU to the UE. The TA adjustment command MAC PDU contains the identification information of the component carriers that need to be adjusted by the UE and the corresponding The TA value that needs to be adjusted. In this case, the difference between the TA value to be adjusted and the TA value to be adjusted in step 305a is only that the TA value adjustment granularity in this case is smaller, that is, the adjustment is more precise. After receiving the TA adjustment command MAC PDU, the UE correspondingly adjusts the TA value that should be adjusted on each component carrier indicated in the command. In other embodiments of the present invention, the above-mentioned precise adjustment process can be performed, so the description will not be repeated in other embodiments.

Further, the CC reconfiguration message in this embodiment may include information on Physical Uplink Shared Channel (Physics Uplink Shared Channel, hereinafter referred to as: PUSCH) resources required for sending the dedicated preamble to the base station, and start using Frame information of the PUSCH resource. Specifically, when the base station allocates a dedicated preamble for those UEs whose CCs are to be reconfigured, it schedules and sends dedicated resources for the dedicated preamble on the PUSCH channel of the CCs to be reconfigured for the UE. In this embodiment, the above trigger The UE allocates a dedicated PUSCH resource in the CC reconfiguration message for uplink synchronization, so that the UE schedules the PUSCH resource on the newly allocated CC to send a dedicated preamble. At this time, the CC reconfiguration message needs to explicitly notify the UE of the frame number of the dedicated PUSCH resource used to send the dedicated Preamble. By scheduling the UE to send the dedicated PUSCH resources of the dedicated Preamble when sending the CC reconfiguration message to the UE, the base station effectively reduces the negative impact of the CC reconfiguration process on the normal random access process.

FIG. 5 is a flow chart of Embodiment 4 of the uplink synchronization processing method of the present invention. As shown in FIG. 5, the method of this embodiment may include:

Step 301b, the base station sends the PDCCH to the UE;

The PDCCH may carry identification information of one or more newly configured CCs, and the identification information is used by the base station to indicate to the UE which CC or several CCs are newly configured.

Step 302b, UE judges according to the PDCCH whether to perform uplink synchronization, if so, execute step 303b, otherwise execute step 304b;

Specifically, when the UE is required to perform uplink synchronization, the PDCCH includes a dedicated preamble allocated for the UE.

In the case that the UE is not required to perform uplink synchronization, the TA value that can be used is indicated for the UE, and the specific manner will not be described again.

After the UE receives the PDCCH, if the PDCCH indicates a dedicated preamble, it means that the UE needs to perform uplink synchronization on some or all CCs of a newly configured CC or multiple CCs. If the PDCCH indicates TA-related information, then The UE does not need to perform uplink synchronization, and can directly implement uplink synchronization with the newly configured CC according to the relevant information of the TA.

Step 303b, the UE sends the dedicated preamble to the base station, and executes step 305b;

The base station may newly configure one CC for the UE, or newly configure multiple CCs or multiple CC pairs for the UE according to bandwidth requirements. For the case of newly configuring multiple CCs or multiple CC pairs, the base station may only allocate one dedicated preamble to the UE, that is, the dedicated preamble is shared by multiple CCs; of course, multiple preambles may also be allocated to the UE.

After receiving the PDCCH sent by the base station, when knowing that uplink synchronization needs to be performed, the UE can send the dedicated preamble indicated in the PDCCH to the base station, so that the base station can feed back the TA value to the UE according to the dedicated preamble.

In step 304b, the UE applies the TA value indicated in the PDCCH to the newly configured CC that does not need to perform uplink synchronization.

Step 305b, the base station sends an extended TA adjustment command to the UE.

The extended TA adjustment command may include the identification information of the CC corresponding to the TA value. If there is only one or a pair of newly configured CCs, or when only one or a pair of newly configured CCs need to perform uplink synchronization, the identification information of the CC may not be included, and the TA adjustment is the default The command is the TA adjustment corresponding to the CC being newly configured. Then, the UE applies the TA value to the newly configured CCs that need to perform uplink synchronization.

For example, the extended TA adjustment command may be a MAC PDU, and its structure may adopt the structure shown in FIG. 4 , which will not be repeated here.

In step 306b, the UE applies the TA value carried in the extended TA adjustment command to the CC that needs to perform uplink synchronization.

The method for the UE to calculate the TA value will not be described again.

So far, the UE can use the TA _new on the CC that needs to perform uplink synchronization, so that when the base station needs to configure a new CC for the UE, or one or some CCs that the UE is using need to be replaced by a newly configured CC, The UE can use the TA _new to achieve uplink synchronization with the newly configured CC, and in this process, the UE is only triggered to perform uplink synchronization through the uplink synchronization indication message, thereby saving downlink radio resources. When the UE needs to perform uplink synchronization, it can pass to The base station sends a dedicated preamble to obtain the TA value to be used on the newly configured CC from the base station, thereby improving the uplink synchronization speed.

Step 307b, the UE receives the CC reconfiguration message sent by the base station.

Since in this embodiment, it is the PDCCH that triggers the UE to perform uplink synchronization, which does not contain some detailed configuration information of the newly configured CC, therefore, in this embodiment, the base station can also send a CC reconfiguration message to the UE, so that the UE can be configured according to The CC reconfiguration message acquires configuration information of the CC corresponding to the identification information.

Further, in this embodiment, a dedicated PUSCH resource can also be allocated to the UE, so that the UE can schedule the PUSCH resource on the newly allocated CC to send a dedicated preamble, thereby effectively reducing the negative impact of the CC reconfiguration process on the normal random access process. influences.

FIG. 6 is a flowchart of Embodiment 5 of the uplink synchronization processing method of the present invention. As shown in FIG. 6, the method of this embodiment may include:

Step 301c, the base station sends the PDCCH to the UE;

The PDCCH may carry identification information of one or more newly configured CCs, and the identification information is used by the base station to indicate to the UE which CC or several CCs are newly configured.

Step 302c, UE judges according to the PDCCH whether to perform uplink synchronization, if so, execute step 303c, otherwise execute step 304c;

Specifically, when the UE is required to perform uplink synchronization, the PDCCH includes a dedicated preamble allocated for the UE, and the dedicated preamble may use the above-mentioned implicit indication or explicit indication.

In the case that the UE is not required to perform uplink synchronization, the TA value that can be used is indicated for the UE, and the specific manner will not be described again.

After the UE receives the PDCCH, if the PDCCH indicates a dedicated preamble, it means that the UE needs to perform uplink synchronization on some or all CCs of a newly configured CC or multiple CCs. If the PDCCH indicates TA-related information, then The UE does not need to perform uplink synchronization, and can directly implement uplink synchronization with the newly configured CC according to the relevant information of the TA.

Step 303c, the UE sends the dedicated preamble to the base station, and executes step 305c;

The base station may newly configure one CC for the UE, or newly configure multiple CCs or multiple CC pairs for the UE according to bandwidth requirements. For the case of newly configuring multiple CCs or multiple CC pairs, the base station may only allocate one dedicated preamble to the UE, that is, the dedicated preamble is shared by multiple CCs; of course, multiple preambles may also be allocated to the UE.

In step 304c, the UE applies the TA value indicated in the PDCCH to the newly configured CC that does not need to perform uplink synchronization.

Step 305c, the base station sends a CC reconfiguration message to the UE.

The CC reconfiguration message contains the TA value that the UE needs to adjust on a newly configured CC, or the CC reconfiguration message contains one or more TA values that the UE needs to adjust on multiple newly configured CCs and the TA values corresponding to each TA value. CC identification information.

When the base station configures a new CC for the UE, the UE can obtain a TA value through the CC reconfiguration message; when the base station configures multiple CCs for the UE, the CC reconfiguration message can be the newly configured multiple A CC indicates a TA value, and may also indicate TA values for multiple CCs respectively. When indicating TA values respectively, it is also necessary to correspond the respectively indicated TA values to the identification information of corresponding CCs.

In step 306c, the UE applies the TA value carried in the CC reconfiguration message to the CC that needs to perform uplink synchronization.

The method for the UE to calculate the TA value will not be described again.

So far, the UE can use the TA _new on the CC that needs to perform uplink synchronization, so that when the base station needs to configure a new CC for the UE, or one or some CCs that the UE is using need to be replaced by a newly configured CC, The UE can use the TA _new to achieve uplink synchronization with the newly configured CC, and in this process, the UE is only triggered to perform uplink synchronization through the uplink synchronization indication message, thereby saving downlink radio resources. When the UE needs to perform uplink synchronization, it can pass to The base station sends a dedicated preamble to obtain the TA value to be used on the newly configured CC from the base station, thereby improving the uplink synchronization speed.

Further, in this embodiment, a dedicated PUSCH resource can also be allocated to the UE, so that the UE can schedule the PUSCH resource on the newly allocated CC to send a dedicated preamble, thereby effectively reducing the negative impact of the CC reconfiguration process on the normal random access process. influences.

FIG. 7 is a flow chart of Embodiment 6 of the uplink synchronization processing method of the present invention. As shown in FIG. 7, the method of this embodiment may include:

Step 401, receiving an uplink synchronization indication message sent by the base station;

The uplink synchronization indication message may be a constituent carrier CC reconfiguration message or a PDCCH;

The uplink synchronization indication message carries identification information of one or more newly configured CCs, and the identification information is used by a base station, such as an eNodeB, to indicate to the UE which CC or several CCs are newly configured. The CC reconfiguration message may also carry detailed configuration information of the newly configured CC. In this embodiment, the uplink synchronization indication message may be sent as an independent RRC message or MAC PDU, or embedded in an RRC connection reconfiguration message.

Step 402: If it is known according to the identification information of the CCs that the newly configured one or more CCs do not belong to the same CC group as the currently used CC, perform uplink synchronization on the newly configured one or more CCs.

The CC grouping refers to a CC group composed of one or more CCs sharing the same TA value.

Consider the situation that among multiple CCs, several CCs may share one TA, and some other CCs may share another TA. We can group CCs according to whether they can share the same TA. In order to enable the UE to obtain CC group information in advance, so as to know whether the newly configured CC belongs to a certain CC group according to the group information, this embodiment may also include: before step 701, the receiving base station sends CC group information, CCs in the same CC group share a timing advance TA value.

When the UE learns from the identification information of the newly configured CCs that the newly configured one or more CCs do not belong to the same CC group as the currently used CCs, it performs uplink synchronization on the newly configured one or more CCs. A specific process for performing uplink synchronization may use a contention-based random access process. The contention-based random access process may be as follows: UE sends a random access Preamble message "Random Access Preamble" to the base station, and the selected Preamble (64 in total) implies the size of the first scheduled uplink message that the subsequent UE needs to send ; Then, the base station sends a random access response message "Random Access Response" on the downlink synchronization channel, and the message is generated by the physical layer. Wherein, the Timing Advance Command field in the message contains the TA value that the UE needs to adjust when sending uplink, and the UL Grant field indicates the bandwidth resource information allocated for the UE to send the first scheduled uplink message. The Temporary C-RNTI field represents a temporary identification information allocated for the UE. The RAPID in the MAC Header indicates the identification information of the preamble sent by the UE, that is, the Random Access Pramble ID; in addition, when there are multiple CCs newly configured by the base station for the UE and the UE needs to perform uplink synchronization, it is necessary to further Some random access response messages are modified as follows:

When a preamble randomly selected by the UE is sent on multiple CCs that need to perform uplink synchronization at the same time, the random access response message sent by the base station to the UE needs to carry multiple TA values corresponding to the The identification information of the CC, so that the UE can clearly know the correspondence between the TA value that needs to be adjusted and the CC after receiving the random access response message.

When the UE randomly selects multiple preambles and sends different premables respectively on multiple CCs that need to perform uplink synchronization, the existing random access response message does not need to be modified.

In addition, after the UE randomly selects the preamble, in order to clearly let the base station know the preamble selected by the UE, the UE sends the identification information of the selected preamble to the base station on the currently used CC. When detecting the preamble reported by the UE, the base station can use the above random access response message or the extended TA command message in other embodiments of the present invention to send the TA value to the UE based on the TA value obtained from the detection of the preamble. In this case, since the base station has identified the UE based on the preamble, the base station may not allocate bandwidth resources for sending uplink messages to the UE in the random access response message, and may also omit sending a contention resolution message to the UE.

According to the indication of the random access response message "Random Access Response", the UE sends the first scheduled uplink message on the uplink synchronization channel; finally, the base station sends a message to the UE in order to solve the conflict problem caused when multiple UEs use the same preamble Send a conflict resolution message.

More preferably, in this embodiment, the process of performing uplink synchronization on one or more newly configured CCs may adopt the uplink synchronization method described in any of the above-mentioned embodiments 1 to 5, which will not be repeated here.

In another embodiment of the uplink synchronization processing method of the present invention, if the newly configured one or more CCs belong to the same CC group as the currently used CC, use the TA of the currently used CC on the one or more CCs value.

In this embodiment, in the case of a CC group, the UE can know whether the newly configured CC belongs to a certain CC group according to the CC group information and the newly configured identification information, and directly use the corresponding CC group if it belongs to a certain CC group. When the TA does not belong to a certain CC group, it can initiate an uplink synchronization operation to the base station, so as to obtain the TA value used on the newly configured CC from the base station. Therefore, in this embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by the newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

FIG. 8 is a flowchart of Embodiment 7 of the uplink synchronization processing method of the present invention. As shown in FIG. 8, the method of this embodiment may include:

Step 501, sending the CC grouping information of the constituent carriers to the user equipment UE by broadcasting or dedicated signaling;

The CC grouping information is used to indicate that CCs in the same group share a TA value.

Consider the situation that among multiple CCs, several CCs may share one TA, and some other CCs may share another TA. We can group CCs according to whether they can share the same TA. In order to enable the UE to obtain CC group information in advance, so as to know whether the newly configured CC belongs to a certain CC group according to the group information.

Step 502, sending an uplink synchronization indication message to the UE;

The uplink synchronization indication message may be a CC reconfiguration message or a physical downlink control channel PDCCH.

The uplink synchronization indication message carries identification information of one or more newly configured CCs, so that the UE learns that the newly configured one or more CCs do not belong to the same CC as the currently used CC according to the identification information of the CCs. When the CCs are grouped, perform uplink synchronization on the newly configured one or more CCs.

The uplink synchronization indication message carries identification information of one or more newly configured CCs, and the identification information is used by a base station, such as an eNodeB, to indicate to the UE which CC or several CCs are newly configured. The CC reconfiguration message may also carry detailed configuration information of the newly configured CC. In this embodiment, the uplink synchronization indication message may be sent as an independent RRC message or MAC PDU, or embedded in an RRC connection reconfiguration message.

When the UE learns from the identification information of the newly configured CCs that the newly configured one or more CCs do not belong to the same CC group as the currently used CCs, it performs uplink synchronization on the newly configured one or more CCs. A specific process for performing uplink synchronization may use a contention-based random access process.

More preferably, in this embodiment, the process of performing uplink synchronization on one or more newly configured CCs may adopt the uplink synchronization method described in any of the above-mentioned embodiments 1 to 5, which will not be repeated here.

Furthermore, when the UE performs handover between base stations, the target base station will allocate multiple CCs to the UE in the handover command for use after the handover. When multiple CCs cannot share the same TA, the base station may notify the UE of the CC grouping information in the handover command.

After receiving the handover command, the UE selects one CC from each CC group to perform uplink synchronization based on the grouping information of multiple CCs acquired in the handover command. Alternatively, the base station may specify a CC for performing uplink synchronization in each CC group for the UE in the handover command.

In this embodiment, in the case of a CC group, the UE can know whether the newly configured CC belongs to a certain CC group according to the CC group information and the newly configured identification information, and directly use the corresponding CC group if it belongs to a certain CC group. When the TA does not belong to a certain CC group, it can initiate an uplink synchronization operation to the base station, so as to obtain the TA value used on the newly configured CC from the base station. Therefore, in this embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by the newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

FIG. 9 is a flow chart of Embodiment 8 of the uplink synchronization processing method of the present invention. As shown in FIG. 9, the method of this embodiment may include:

Step 601, receiving an uplink synchronization indication message sent by the base station;

The uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs and indication information of sending sounding reference signals on the newly configured one or more CCs.

In this embodiment, the sounding reference signal may be a Sounding RS.

In the LTE system, the UE needs to send the Sounding RS to the base station during the communication process with the base station, so as to ensure that the base station can detect the signal quality of the UE on the entire uplink bandwidth in real time. In this embodiment, when the CC is reconfigured for the UE, the UE may be instructed to first send the Sounding RS on the newly configured CC, and then the base station may determine the TA value based on the detection of the Sounding RS.

Step 602: Send a sounding reference signal to the base station on the newly configured one or more CCs according to the indication information;

Step 603: Receive a timing advance TA adjustment message sent by the base station according to the sounding reference signal, and apply the TA value carried in the TA adjustment message to the CC corresponding to the identification information.

In another embodiment of the uplink synchronization processing method of the present invention, the uplink synchronization indication message includes: a CC reconfiguration message, a physical downlink control channel PDCCH or a media access control protocol data unit MAC PDU, and the TA adjustment message includes: an extended TA value adjustment command, the extended TA value adjustment command includes the TA value that needs to be adjusted on a newly configured CC, or the extended TA value adjustment command includes one or more TA values that need to be adjusted on multiple CCs that are newly configured TA values and the identification information of CCs corresponding to each TA value.

The extended TA adjustment command may adopt the extended TA adjustment command described in the first to fifth embodiments above, and details are not repeated here.

If the uplink synchronization indication message is a PDCCH or MAC PDU, the TA adjustment message is a CC reconfiguration message, and the CC reconfiguration message includes a TA value that needs to be adjusted on a newly configured CC, or the CC reconfiguration message The configuration message includes one or more TA values that need to be adjusted on multiple newly configured CCs and identification information of CCs corresponding to each TA value.

In this embodiment, the base station sends to the UE an uplink synchronization indication message carrying indication information for the UE to send the Sounding RS, so that the UE can send the Sounding RS to the base station after receiving the uplink synchronization indication message, so that the base station can transmit the Sounding RS according to the Sounding RS. The RS calculates and obtains the TA value used on the newly configured CC for the UE, and sends the TA value to the UE. Therefore, in this embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by the newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

FIG. 10 is a flowchart of Embodiment 9 of the uplink synchronization processing method of the present invention. As shown in FIG. 10, the method of this embodiment may include:

Step 701, sending an uplink synchronization indication message to the user equipment UE;

The uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs and indication information of sending sounding reference signals on the newly configured one or more CCs.

In this embodiment, the sounding reference signal may be a Sounding RS.

In the LTE system, the UE needs to send the Sounding RS to the base station during the communication process with the base station, so as to ensure that the base station can detect the signal quality of the UE on the entire uplink bandwidth in real time. In this embodiment, when the CC is reconfigured for the UE, the UE may be instructed to first send the Sounding RS on the newly configured CC, and then the base station may determine the TA value based on the detection of the Sounding RS.

Step 702, receiving the sounding reference signal sent by the UE to the base station on the newly configured one or more CCs according to the indication information;

Step 703, according to the timing advance TA adjustment message sent to the UE according to the sounding reference signal, so that the UE applies the TA value carried in the TA adjustment message to the CC corresponding to the identification information .

In another embodiment of the uplink synchronization processing method of the present invention, the uplink synchronization indication message includes: a CC reconfiguration message, a physical downlink control channel PDCCH or a media access control protocol data unit MAC PDU, and the TA adjustment message includes: an extended TA value adjustment command, the extended TA value adjustment command includes the TA value that needs to be adjusted on a newly configured CC, or the extended TA value adjustment command includes one or more TA values that need to be adjusted on multiple CCs that are newly configured TA values and the identification information of CCs corresponding to each TA value.

The extended TA adjustment command may adopt the extended TA adjustment command described in the first to fifth embodiments above, and details are not repeated here.

If the uplink synchronization indication message is a PDCCH or MAC PDU, the TA adjustment message is a CC reconfiguration message, and the CC reconfiguration message includes a TA value that needs to be adjusted on a newly configured CC, or the CC reconfiguration message The configuration message includes one or more TA values that need to be adjusted on multiple newly configured CCs and identification information of CCs corresponding to each TA value.

In this embodiment, the base station sends to the UE an uplink synchronization indication message carrying indication information for the UE to send the Sounding RS, so that the UE can send the Sounding RS to the base station after receiving the uplink synchronization indication message, so that the base station can transmit the Sounding RS according to the Sounding RS. The RS calculates and obtains the TA value used on the newly configured CC for the UE, and sends the TA value to the UE. Therefore, in this embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by the newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

In another embodiment of the uplink synchronization processing method of the present invention, as long as the UE receives a CC reconfiguration message or the CC reconfiguration message contains a newly configured CC, the UE performs an uplink synchronization process. In this embodiment, a group of preambles can be set in advance, and the preambles in this group are specially used for CC reconfiguration; or, in addition to the original random access channel, a new random access channel is specially set for CC reconfiguration Send a random access preamble during configuration, or schedule a PUSCH resource dedicated for sending a random access preamble for the UE during CC reconfiguration. Thereby avoiding the negative impact on the traditional random access process. The method in this embodiment may specifically include: the base station sends a CC reconfiguration message to the UE; after receiving the CC reconfiguration message, the UE selects a preamble from the preamble group dedicated to CC reconfiguration and sends it to the base station, or, if the system does not The preamble group dedicated to CC reconfiguration, and a new random access channel is set for CC reconfiguration, then the UE randomly selects one from the currently available preamble, and sends it on the new random access channel dedicated to CC reconfiguration The preamble is sent to the base station, or, if the system does not set a dedicated preamble and a new random access channel for CC reconfiguration, the base station can schedule the UE in the CC reconfiguration message when sending the CC reconfiguration message to the UE. Send the PUSCH resource of the preamble, and the UE randomly selects one of the currently available preambles, and then sends the selected preamble on the PUSCH resource scheduled in the CC reconfiguration message; after receiving the preamble sent by the UE, the base station sends a TA adjustment command to UE. In addition to the TA value, the TA adjustment command needs to include the identification information of the preamble sent by the detected UE (the identification information can be the identification information in the dedicated preamble group, or the identification information of all preambles in the current cell) , optionally, may also include the identification information of the newly configured CC. The extended TA adjustment command may adopt the extended TA adjustment command described in the first to fifth embodiments above, and details are not repeated here.

In this embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by a newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

FIG. 11 is a flowchart of Embodiment 10 of the uplink synchronization processing method of the present invention. As shown in FIG. 11, the method of this embodiment may include:

Step 801. Obtain the downlink timing value T1 and uplink timing advance TA1 of the component carrier CC or CC pair being used, and the downlink timing value T2 of the newly configured CC or CC pair;

Step 802, apply the formula (2) to calculate and obtain the uplink timing advance TA2 of the newly configured CC,

TA2＝TA1+2×(T2－T1) (2)

Step 803, apply the obtained TA2 to the newly configured CC.

In this embodiment, the UE can adjust the TA status of the newly configured CC by itself according to the TA value of the configured CC. Regardless of whether multiple CCs share TA, the UE can advance the downlink timing value and uplink timing according to the configured CC. and the downlink timing value of the newly configured CC to calculate the uplink timing advance of the newly configured CC. It can be understood that this embodiment may be combined with the methods in other embodiments to calculate the TA value of the newly configured CC. In this embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by a newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

The technical solutions of all the above embodiments describe the TA adjustment during CC reconfiguration by taking frequency division duplex as an example. For time division duplex, since CC does not distinguish between uplink CC and downlink CC, all the related When CC reconfiguration is directly replaced by CC reconfiguration in the case of time division duplexing, all the methods mentioned in the embodiments are applicable.

It should be noted that, in each embodiment of the present invention involving the use of a dedicated preamble for uplink synchronization, the following method can be used to replace the use of a dedicated preamble, and the specific process is as follows:

When the UE knows that uplink synchronization needs to be performed on one or more newly configured CCs, the UE randomly selects one or more preambles, and sends the selected preambles to the base station on one or more CCs that need to perform uplink synchronization, In order to clearly let the base station know the preamble selected by the UE, before the UE sends these preambles or during the sending process, the UE reports the identity information of the selected preamble to the base station on the CC currently in use, and the UE can use any of the following methods An index to report the selected preamble to the base station:

1) RRC signaling; 2) MAC control PDU; 3) physical layer signaling; 4) embedding the identification information of the selected Preamble in the uplink user plane data packet.

When the base station detects the preamble reported by the UE on the CC that needs to perform uplink synchronization, the base station can use the existing random access response message to send the TA value obtained based on the detection of the preamble to the UE, but when the UE is in When the same preamble is sent on multiple CCs, it is necessary to indicate multiple TA values in the random access response message, and at the same time, it is necessary to indicate the identification information of the CCs corresponding to the multiple TA values, that is, let the UE clearly know the difference between the TA value and the CC. Correspondence between. Alternatively, the one or more TA values detected by the base station may also be sent to the UE by using the extended TA command message or CC reconfiguration message described in various embodiments.

In addition, for a frequency division duplex system, if the base station separately configures an uplink CC for the UE without configuring a downlink CC corresponding to the uplink CC for the UE, the UE cannot obtain the T2 value. In this case Next, the UE may initiate an uplink synchronization operation on the uplink CC, that is, may perform a random access procedure on the uplink CC, or perform an uplink synchronization operation according to methods in other embodiments of the present invention.

FIG. 12 is a schematic structural diagram of Embodiment 1 of the user equipment of the present invention. As shown in FIG. 12 , the UE in this embodiment may include: a first receiving module 11, a first sending module 12, and a first processing module 13, wherein the first receiving The module 11 is configured to receive the uplink synchronization indication message sent by the base station, and the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs; the first sending module 12 is configured to receive the identification information corresponding to the identification information When a newly configured CC or all or some of the multiple CCs need to perform uplink synchronization, the synchronization signaling is sent to the base station; the first processing module 13 is used to receive the base station according to the first receiving module. After the timing advance TA adjustment message sent by the synchronization signaling, the TA value carried in the TA adjustment message is applied to the CC that needs to perform uplink synchronization.

The implementation principle of the UE in this embodiment is the same as that of Embodiment 1 of the uplink synchronization processing method shown in FIG. 1 , and details are not repeated here.

In another embodiment of the UE of the present invention, if the uplink synchronization indication message received by the first receiving module is a CC reconfiguration message, the first receiving module is further configured to receive the message sent by the base station according to the synchronization signaling. The extended TA value adjustment command, the extended TA value adjustment command includes the TA value that needs to be adjusted on a newly configured CC, or the extended TA value adjustment command includes the newly configured TA value that needs to be adjusted on multiple CCs One or more TA values of , and the identification information of the CC corresponding to each TA value.

The implementation principle of the UE in this embodiment is the same as that of Embodiment 3 of the uplink synchronization processing method shown in FIG. 3 , and details are not repeated here.

In yet another embodiment of the UE of the present invention, if the uplink synchronization indication message received by the first receiving module is a Physical Downlink Control Channel (PDCCH), the first receiving module is further configured to receive The extended TA value adjustment command is sent, and the CC reconfiguration message sent by the base station is received.

The implementation principle of the UE in this embodiment is the same as that of Embodiment 4 of the uplink synchronization processing method shown in FIG. 5 , and details are not repeated here.

In another embodiment of the UE of the present invention, if the uplink synchronization indication message received by the first receiving module is a physical downlink control channel (PDCCH), the first receiving module is further configured to receive the synchronization signal sent by the base station according to the synchronization signaling. CC reconfiguration message, the CC reconfiguration message includes the TA value that needs to be adjusted on a newly configured CC, or the CC reconfiguration message includes one or more TAs that need to be adjusted on multiple newly configured CCs value, and the identification information of the CC corresponding to each TA value.

The implementation principle of the UE in this embodiment is the same as that of Embodiment 5 of the uplink synchronization processing method shown in FIG. 6 , and details are not repeated here.

In the above embodiment of the UE, when it is known from the uplink synchronization indication message that no uplink synchronization needs to be performed on a newly configured CC or all or some CCs among multiple CCs, the first processing module is further configured to: Apply the TA value indicated in the uplink synchronization indication message to the newly configured CCs that do not need to perform uplink synchronization.

For the UE in the above embodiment, when the base station needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by a newly configured CC, the UE can use the obtained TA value to achieve the new CC configuration. Uplink synchronization, and in this process, only the uplink synchronization instruction message, such as CC reconfiguration message or PDCCH, triggers the UE to perform uplink synchronization, thereby saving downlink radio resources. When the UE needs to perform uplink synchronization, it can send a synchronization signal to the base station Command, such as a dedicated preamble, can obtain the TA value to be used on the newly configured CC from the base station, thereby improving the uplink synchronization speed. When the UE knows that it does not need to perform uplink synchronization according to the received uplink synchronization indication message, it can directly apply the TA value indicated in the uplink synchronization indication message to the newly configured CC that does not need to perform uplink synchronization, or directly apply the current The unique TA value of the CC being used is applied to the newly configured CC that does not need to perform uplink synchronization, so that the UE can also achieve uplink synchronization with the newly configured CC when it does not need to perform uplink synchronization.

FIG. 13 is a schematic structural diagram of Embodiment 1 of the base station of the present invention. As shown in FIG. 13 , the base station of this embodiment may include: a second sending module 21 and a second receiving module 22, wherein the second sending module 21 is used to send The UE sends an uplink synchronization indication message, and the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs; the second receiving module 22 is configured to receive the synchronization signaling sent by the UE; the second The sending module 21 is further configured to send a timing advance TA adjustment message to the UE according to the synchronization signaling, so as to instruct the UE to apply the TA value carried in the TA adjustment message to the CC that needs to perform uplink synchronization.

The implementation principle of the base station in this embodiment is the same as that of Embodiment 1 of the uplink synchronization processing method shown in FIG. 2 , and details are not repeated here.

In another embodiment of the base station of the present invention, if the uplink synchronization indication message sent by the second sending module to the UE is a CC reconfiguration message, the second sending module is further configured to send the extended TA value to the UE An adjustment command, the extended TA value adjustment command includes the TA value that the UE needs to adjust on a newly configured CC, or the extended TA value adjustment command includes one or more CCs that the UE needs to adjust on the newly configured CC. A plurality of TA values, and identification information of CCs corresponding to each TA value.

The implementation principle of the base station in this embodiment is the same as that of Embodiment 3 of the uplink synchronization processing method shown in FIG. 3 , and details are not repeated here.

In yet another embodiment of the base station of the present invention, if the uplink synchronization indication message sent by the second sending module to the UE is a PDCCH, the second sending module is further configured to send an extended TA value adjustment command and CC reconfiguration message.

The implementation principle of the base station in this embodiment is the same as that of Embodiment 4 of the uplink synchronization processing method shown in FIG. 5 , and details are not repeated here.

In yet another embodiment of the base station of the present invention, if the uplink synchronization indication message sent by the second sending module to the UE is a physical downlink control channel PDCCH, the second sending module is also used to send an extended TA message to the UE A value adjustment command and a CC reconfiguration message; or, the second sending module is further configured to send a CC reconfiguration message to the UE, and the CC reconfiguration message includes the TA value that the UE needs to adjust on a newly configured CC , or the CC reconfiguration message includes one or more TA values that the UE needs to adjust on multiple newly configured CCs, and identification information of CCs corresponding to each TA value.

The implementation principle of the base station in this embodiment is the same as that of Embodiment 5 of the uplink synchronization processing method shown in FIG. 6 , and details are not repeated here.

In the above embodiment of the base station, the base station can send an uplink synchronization indication message to the UE, so that when a new CC is configured for the UE, or a newly configured CC is used to replace one or some CCs that the UE is using, the uplink synchronization indication message can be used according to the uplink synchronization indication message. The synchronization indication message knows whether to perform uplink synchronization, so that the UE can achieve uplink synchronization with the newly configured CC, and in this process, the UE is only triggered to perform uplink synchronization through the uplink synchronization indication message, thereby saving downlink radio resources. During uplink synchronization, the TA value to be used on the newly configured CC can be obtained from the base station by sending synchronization signaling, such as a dedicated preamble, to the base station, thereby improving the uplink synchronization speed. When the UE knows that it does not need to perform uplink synchronization according to the received uplink synchronization indication message, it can directly apply the TA value indicated in the uplink synchronization indication message to the newly configured CC that does not need to perform uplink synchronization, or directly apply the current The unique TA value of the CC being used is applied to the newly configured CC that does not need to perform uplink synchronization, so that the UE can also achieve uplink synchronization with the newly configured CC when it does not need to perform uplink synchronization.

FIG. 14 is a schematic structural diagram of Embodiment 2 of the user equipment of the present invention. As shown in FIG. 14 , the UE of this embodiment may include: a third receiving module 31 and a third processing module 32, wherein the third receiving module 31 is used to receive The uplink synchronization indication message sent by the base station, the uplink synchronization indication message carrying the identification information of one or more newly configured component carrier CCs; the third processing module 32 is configured to acquire a newly configured CC according to the identification information of the CC or multiple CCs and the currently used CC do not belong to the same CC group, perform uplink synchronization on the newly configured one or more CCs, where the CC group is one or more CCs sharing the same TA value Composed of CC groups.

Further, before receiving the uplink synchronization indication message sent by the base station, the third receiving module 31 is also used for receiving CC group information sent by the base station through broadcast or dedicated signaling, and the CC group information is used to indicate the CC group information in the same CC group. CCs share a TA value.

The implementation principle of the UE in this embodiment is the same as that of Embodiment 6 of the uplink synchronization processing method shown in FIG. 7 , and will not be repeated here.

In the UE of this embodiment, when there is a CC group, the UE can know whether the newly configured CC belongs to a certain CC group according to the CC group information and the newly configured identification information, and directly use the CC when it belongs to a certain CC group The TA corresponding to the group realizes uplink synchronization. When it does not belong to a certain CC group, it can initiate an uplink synchronization operation to the base station, so as to obtain the TA value used on the newly configured CC from the base station. Therefore, when the base station needs to configure a new CC for the UE, or when one or some CCs being used by the UE need to be replaced by a newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

FIG. 15 is a schematic structural diagram of Embodiment 2 of the base station of the present invention. As shown in FIG. 15 , the base station of this embodiment may include: a third sending module 41 and a fourth sending module 42, wherein the third sending module 41 is used to broadcast The CC grouping information of the constituent carrier is sent to the user equipment UE by means of dedicated signaling, and the CC grouping information is used to indicate that the CCs in the same group share a TA value; the fourth sending module 42 is used to send an uplink synchronization indication message to the UE, The uplink synchronization indication message carries identification information of one or more newly configured CCs, so that the UE learns that the newly configured one or more CCs do not belong to the same CC as the currently used CC according to the identification information of the CCs. When the CCs are grouped, perform uplink synchronization on the newly configured one or more CCs.

The implementation principle of the base station in this embodiment is the same as that of Embodiment 7 of the uplink synchronization processing method shown in FIG. 8 , and details are not repeated here.

The base station in this embodiment, in the case of having a CC group, can enable the UE to know whether the newly configured CC belongs to a certain CC group according to the CC group information and the newly configured identification information, so that when the UE belongs to a certain CC group, Directly use the TA corresponding to the CC group to achieve uplink synchronization. If it does not belong to a certain CC group, it can initiate an uplink synchronization operation to the base station, so as to obtain the TA value used on the newly configured CC from the base station. Therefore, when the base station of this embodiment needs to configure a new CC for the UE, or one or some CCs being used by the UE need to be replaced by the newly configured CC, the UE can achieve uplink synchronization with the newly configured CC.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: it still Modifications or equivalent replacements can be made to the technical solutions of the present invention, and these modifications or equivalent replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present invention.

Claims (12)

1. A user equipment, characterized in that, comprising: The first receiving module is configured to receive an uplink synchronization indication message sent by the base station, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs; The first sending module is configured to send synchronization signaling to the base station when it is known that a newly configured CC corresponding to the identification information, or all or some of the CCs need to perform uplink synchronization; The first processing module is configured to, after the first receiving module receives the timing advance TA adjustment message sent by the base station according to the synchronization signaling, apply the TA value carried in the TA adjustment message to the device that needs to perform uplink synchronization on CC; The acquisition of the newly configured CC corresponding to the identification information, or all or some of the multiple CCs need to perform uplink synchronization, including: According to the bit indication information used to indicate whether to perform uplink synchronization on all or part of the newly configured CC or CCs in the uplink synchronization indication message, it is known that the newly configured CC or CCs need to perform Perform uplink synchronization on all or some CCs; or Knowing that uplink synchronization needs to be performed on all or some of the newly configured CCs or multiple CCs according to the allocation information of the synchronization signaling included in the uplink synchronization indication message; Wherein, the synchronization signaling includes: a dedicated preamble or a sounding reference signal. 2. The user equipment according to claim 1, wherein if the uplink synchronization indication message received by the first receiving module is a CC reconfiguration message, the first receiving module is further configured to receive the The extended TA value adjustment command sent by the synchronization signaling, the extended TA value adjustment command includes the TA value that needs to be adjusted on a newly configured CC, or the extended TA value adjustment command is included in the newly configured One or more TA values that need to be adjusted on multiple CCs, and identification information of CCs corresponding to each TA value. 3. The user equipment according to claim 1, wherein if the uplink synchronization indication message received by the first receiving module is Physical Downlink Control Channel (PDCCH) signaling, the first receiving module is further used for: receiving the extended TA value adjustment command sent by the base station according to the synchronization signaling; or, Receive a CC reconfiguration message sent by the base station according to the synchronization signaling, the CC reconfiguration message includes a TA value that needs to be adjusted on a newly configured CC, or the CC reconfiguration message includes a newly configured CC One or more TA values that need to be adjusted on multiple CCs, and identification information of CCs corresponding to each TA value. 4. The user equipment according to claim 1, wherein the uplink synchronization indication message is sent as a radio resource control (RRC) message or a medium access control protocol data unit MAC PDU, or is embedded in an RRC connection reconfiguration message send. 5. The user equipment according to claim 1, wherein the uplink synchronization indication message includes information about a physical uplink shared channel (PUSCH) resource and frame information for starting to use the PUSCH resource, and the PUSCH resource is used to send information to all The base station sends the synchronization signaling. 6. The user equipment according to any one of claims 1-5, wherein: When it is known from the uplink synchronization indication message that uplink synchronization does not need to be performed on a newly configured CC or all or some CCs among multiple CCs, the first processing module is further configured to include the The indicated TA value is applied to newly configured CCs that do not need to perform uplink synchronization; or When it is learned from the uplink synchronization indication message that uplink synchronization does not need to be performed on a newly configured CC or all or some of the CCs, the first processing module is further configured to set the unique The TA value is applied to all or some of the newly configured CCs that do not need to perform uplink synchronization. 7. The user equipment according to claim 6, wherein the learning according to the uplink synchronization indication message does not need to perform uplink synchronization on all or part of the newly configured CC or multiple CCs, including : When a newly configured CC has the same TA value as any one of the currently used one or more CCs, the indicated TA value includes: the newly configured TA value that needs to be adjusted on a CC, or the TA value currently in use Identity information of the CC, where the identity information of the CC indicates that the TA value to be used on the newly configured CC is the same as the TA value of the CC corresponding to the identity information of the CC; When the newly configured multiple CCs have the same TA value as the currently used CC, the indicated TA value includes: the TA value corresponding to the multiple newly configured CCs, the TA value corresponding to the multiple newly configured CCs The number of the value, or the number of the currently used CC, the TA value required for the newly configured CC is the same as the TA value of the CC corresponding to the CC number. 8. The user equipment according to any one of claims 1-5, wherein the applying the TA value carried in the TA adjustment message to the CC that needs to perform uplink synchronization includes: Applying formula (1) to calculate and obtain the TA _new required on the CC that needs to perform uplink synchronization, and apply the TA _new to the CC that needs to perform uplink synchronization, TA _new = TA _reference + (TA-M) × Ts (1) Wherein, TA is the TA value carried in the TA adjustment message, and TA _reference indicates the TA value on the currently used CC, the reference value sent by the base station in the uplink synchronization instruction message or the RRC connection established for the first time The TA value on the CC at that time, or the TA value on the main carrier; M is a preset empirical value; T _S =1/(15000×2048). 9. A base station, characterized in that it comprises: The second sending module is configured to send an uplink synchronization indication message to the user equipment UE, where the uplink synchronization indication message carries identification information of one or more newly configured component carrier CCs; The second receiving module is configured to receive the synchronization signaling sent by the UE; The second sending module is further configured to send a timing advance TA adjustment message to the UE according to the synchronization signaling, so as to instruct the UE to apply the TA value carried in the TA adjustment message to the UE that needs to perform uplink synchronization. on CC; The sending the uplink synchronization indication message to the UE includes: Sending an uplink synchronization indication message to the UE, where the bit indication information in the uplink synchronization indication message is used to indicate that uplink synchronization needs to be performed on all or part of the newly configured CC or multiple CCs; or to the UE The UE sends an uplink synchronization indication message, and the allocation information of the synchronization signaling in the uplink synchronization indication message is used to indicate that uplink synchronization needs to be performed on all or part of the newly configured CC or multiple CCs; Wherein, the synchronization signaling includes: a dedicated preamble or a sounding reference signal. 10. The base station according to claim 9, characterized in that, If the uplink synchronization indication message sent by the second sending module to the UE is a CC reconfiguration message, the second sending module is further configured to send an extended TA value adjustment command to the UE, and the extended TA value adjustment command The command includes the TA value that the UE needs to adjust on a newly configured CC, or the extended TA value adjustment command includes one or more TA values that the UE needs to adjust on multiple CCs that are newly configured, and each TA value Identification information of the corresponding CC. 11. The base station according to claim 9, characterized in that, If the uplink synchronization indication message sent by the second sending module to the UE is physical downlink control channel PDCCH signaling, the second sending module is also used to send an extended TA value adjustment command and a CC reconfiguration message to the UE or, the second sending module is further configured to send a CC reconfiguration message to the UE, where the CC reconfiguration message includes the TA value that the UE needs to adjust on a newly configured CC, or the CC reconfiguration message It includes one or more TA values that the UE needs to adjust on multiple newly configured CCs, and identification information of CCs corresponding to each TA value. 12. The base station according to any one of claims 10 to 11, wherein when uplink synchronization does not need to be performed on all or part of the newly configured CC or multiple CCs, the UE Send an uplink synchronization indication message, including: Send an uplink synchronization indication message carrying TA value indication information to the UE. When a newly configured CC has the same TA value as any one of one or more CCs currently in use, the indicated TA value includes: new The TA value that needs to be adjusted on a configured CC, or the identification information of the CC currently in use. The identification information of the CC indicates the TA value that needs to be used on the newly configured CC and the TA of the CC corresponding to the identification information of the CC The values are the same. When the newly configured multiple CCs have the same TA value as the currently used CC, the indicated TA value includes: the TA values corresponding to the multiple newly configured CCs, the TA values corresponding to the multiple newly configured CCs respectively The number of the corresponding TA value, or the number of the currently used CC, the TA value to be used by the newly configured CC is the same as the TA value of the CC corresponding to the CC number.