CN107889174A

CN107889174A - A kind of switching method, terminal device, base station and system

Info

Publication number: CN107889174A
Application number: CN201610877651.8A
Authority: CN
Inventors: 徐晓东
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Communications Co Ltd
Priority date: 2016-09-30
Filing date: 2016-09-30
Publication date: 2018-04-06
Anticipated expiration: 2036-09-30
Also published as: CN107889174B

Abstract

The invention discloses a kind of switching method, terminal device, base station and system, wherein method includes：The switching command sent of source base station is received, wherein, the configuration information of the detection reference signal (SRS) of the target BS configuration of the terminal device is at least carried in the switching command；Configuration information based on the SRS in the switching command sends SRS, wherein, the SRS is used to cause the target BS to detect Timing Advance (TA)；Receive that the source base station sends comprises at least the target BS indication signaling for having TA, determines the uplink synchronous completed between the target BS based on the TA in the target BS indication signaling and switches to the target BS.

Description

A kind of switching method, terminal device, base station and system

Technical field

The present invention relates to the handover management in the communications field, more particularly to a kind of switching method, terminal device, base station and it is System.

Background technology

In existing system, switched between cell, handover measurement, handover decisions and switching can be included and performed Etc. several steps；When especially switching between cells, it is possible to which existing needs first to discharge between cell-of-origin Connection resettles the connection with Target cell.During this section, terminal device with Target cell due to that can not carry out data at once Interaction, especially when Target cell and cell-of-origin are alien-frequency district, it is possible to terminal device and Target cell occurs Carry out data interaction delay it is longer the problem of, it can be seen that in the prior art, can not ensure it is less during business datum Interactive delay situation.

The content of the invention

In view of this, can be at least it is an object of the invention to provide a kind of switching method, terminal device, base station and system Solves the above-mentioned problems in the prior art.

To reach above-mentioned purpose, the technical proposal of the invention is realized in this way：

The embodiments of the invention provide a kind of switching method, methods described includes：

The switching command that source base station is sent is received, wherein, the terminal device is at least carried in the switching command The detection reference signal SRS of target BS configuration configuration information；

Configuration information based on the SRS in the switching command sends SRS, wherein, the SRS is used to cause the target Base station detects timing advance TA；

Receive that the source base station sends comprises at least the target BS indication signaling for having TA, based on the target BS TA in indication signaling determines the uplink synchronous completed between the target BS and switches to the target BS.

The embodiments of the invention provide a kind of switching method, and applied to source base station, methods described includes：

Target BS is chosen for terminal device, receives the configuration for the detection reference signal SRS that the target BS is sent Information；

At least the configuration information of the SRS is added in switching command, sending the switching to the terminal device refers to Order.

The embodiments of the invention provide a kind of switching method, and applied to target BS, methods described includes：

It is used for the detection reference signal SRS of Timing Advance detection configuration information for terminal equipment configuration；

The configuration information of the SRS is sent to the source base station of the terminal device；

The SRS that the terminal device is sent is detected, is determined based on the SRS detected corresponding to the terminal device TA, the TA is sent to the source base station of the terminal device.

The embodiments of the invention provide a kind of terminal device, the terminal device includes：

Receiving unit, the switching command sent for receiving source base station, wherein, at least carried in the switching command State the SRS of the target BS configuration of terminal device configuration information；Comprising at least of receiving that the source base station sends has TA's Target BS indication signaling；

Processing unit, for determining to complete between the target BS based on the TA in the target BS indication signaling Uplink synchronous and switch to the target BS；

Information transmitting unit, SRS is sent for the configuration information based on the SRS in the switching command, wherein, it is described SRS is used to cause the target BS to detect TA.

The embodiments of the invention provide a kind of source base station, including：

Base station selection unit, for choosing target BS for terminal device；

Receiving unit, the detection reference signal SRS sent for receiving the target BS configuration information；

Transmitting element, at least the configuration information of the SRS to be added in switching command, sent out to the terminal device Send the switching command.

The embodiments of the invention provide a kind of target BS, including：

Dispensing unit, the configuration of the detection reference signal SRS for being used for Timing Advance detection for terminal equipment configuration Information；The TA is sent to the source base station of the terminal device；

Transmitting element, for the configuration information of the SRS to be sent to the source base station of the terminal device；

Detecting signal unit, the SRS sent for detecting the terminal device, institute is determined based on the SRS detected State TA corresponding to terminal device.

Source base station is that terminal device chooses target BS；

The target BS of the terminal device is the SRS that the terminal equipment configuration is used for Timing Advance detection Configuration information；The configuration information of the SRS is sent to the source base station of the terminal device；

The source base station receives the configuration information for the SRS that the target BS is sent, and the SRS at least is matched somebody with somebody into confidence Breath is added in switching command, and the switching command is sent to the terminal device；

The terminal device receives the switching command that the source base station is sent, wherein, at least carried in the switching command There is the SRS of the target BS configuration of terminal device configuration information；Configuration information based on the SRS in the switching command Send SRS；

The target BS detects the SRS that the terminal device is sent, and the terminal is determined based on the SRS detected TA corresponding to equipment, the TA is sent to the source base station of the terminal device, the source base station transmission is including at least the mesh for having TA Base station indication signaling is marked to the terminal device；

What the terminal device received that the source base station sends comprises at least the target BS indication signaling for having TA, is based on TA in the target BS indication signaling is synchronized with the target BS and is switched to the target BS.

The embodiments of the invention provide a kind of switching system, the system includes：

Source base station, for choosing target BS for terminal device；Receive the SRS that the target BS is sent matches somebody with somebody confidence Breath, at least the configuration information of the SRS is added in switching command, the switching command is sent to the terminal device；Hair Deliver to and include TA target BS indication signaling less to the terminal device；

Target BS, the configuration information of the SRS for being used for Timing Advance detection for terminal equipment configuration；By described in SRS configuration information is sent to the source base station of the terminal device；The SRS that the terminal device is sent is detected, based on detecting The SRS determine the terminal device corresponding to TA, send the TA to the source base station of the terminal device；

Terminal device, the switching command sent for receiving the source base station, wherein, at least carried in the switching command There is the SRS of the target BS configuration of terminal device configuration information；Configuration information based on the SRS in the switching command Send SRS；Receive that the source base station sends comprises at least the target BS indication signaling for having TA, based on the target BS TA in indication signaling is synchronized with the target BS and is switched to the target BS.

The embodiments of the invention provide a kind of switching method, terminal device, base station and system, terminal device can just obtain SRS configuration information is directed to target BS, and then the configuration information based on SRS sends SRS, to cause target BS to be based on SRS measurement sends TA to terminal device, and then terminal device is finally linked into target BS based on TA.So so that terminal Equipment can the configuration information based on the SRS that target BS is sent configured for SRS, so as to just reduce terminal device When being switched between source base station and target BS, the industry caused by it can not learn the corresponding configuration of target BS The problem of transmission delay for data of being engaged in, it is that terminal is set under the scene that alien frequencies works that can especially reduce target BS with source base station The delay issue of business datum in standby handoff procedure.

Further, since keep being directed to source base station in handoff procedure, while establishing the processing link for target BS Processing link communication, so as to avoid carrying out handling delay caused by business datum caused by the replacement of link, further Lifting handoff procedure in terminal device receive the treatment effeciency of business datum.

Brief description of the drawings

Fig. 1 is switching method of embodiment of the present invention schematic flow sheet one；

Fig. 2 is switching method of embodiment of the present invention schematic flow sheet two；

Fig. 3 is switching method of embodiment of the present invention schematic flow sheet three；

Fig. 4 is switching method of embodiment of the present invention schematic flow sheet four；

Fig. 5 is that terminal device of the embodiment of the present invention forms structural representation；

Fig. 6 is that source base station of the embodiment of the present invention forms structural representation；

Fig. 7 is that target BS of the embodiment of the present invention forms structural representation；

Fig. 8 is switching method of embodiment of the present invention schematic flow sheet five；

Fig. 9 is that system of the embodiment of the present invention forms structural representation.

Embodiment

Below in conjunction with the accompanying drawings and specific embodiment the present invention is further described in more detail.

Embodiment one,

The embodiments of the invention provide a kind of switching method, applied to terminal device, as shown in figure 1, including：

Step 11：The switching command that source base station is sent is received, wherein, the terminal is at least carried in the switching command The configuration information of the detection reference signal (SRS, Sounding Reference Signal) of the target BS configuration of equipment；

Step 12：Configuration information based on the SRS in the switching command sends SRS, wherein, the SRS is used to cause The target BS detects Timing Advance (TA)；

Step 13：Receive that the source base station sends comprises at least the target BS indication signaling for having TA, based on described TA in target BS indication signaling determines the uplink synchronous completed between the target BS and switches to the target base Stand.

Here, the terminal device can be mobile terminal, can be mobile phone specifically.

It is pointed out that before step 11 is performed, the terminal device also needs to perform the operation such as handover measurement, than Such as, can include：The terminal device can configure according to the measurement of source base station, the ginseng sent at least one candidate base station Examine signal to measure, obtain sending to the source base station for the signal measurement result of at least one candidate base station, to cause The source base station can the signal measurement result based at least one candidate base station be the terminal device choose to obtain one Individual target BS.Certainly, it is to be understood that a kind of embodiment that terminal device switches over measurement is above are only, it is actual Other handover measurements can also be included in processing, without exhaustion in the present embodiment.

Further, the source base station is described after the target BS to Target cell is chosen for the terminal device Source base station can also switch over preparation, such as, it can include：Source base station sends switching to the target BS that selection is arrived please Ask, and after the confirmation of handover request of the target BS feedback is received, carried out for the terminal device descending The distribution of resource.

In above-mentioned steps 11, in the switching command that the source base station is sent, include the SRS's of the target BS configuration Configuration information；Switching command connects reconfiguration information by wireless heterogeneous networks (RRC, Radio Resource Control) and taken Band；The RRC connection reconfiguration informations are sent from target BS to the source base station, in specific generating mode the present embodiment not It is defined.

The SRS of above-mentioned target BS configuration configuration information, including at least the frequency point information for having target BS, or, extremely Include the running time-frequency resource information of the target BS less；

Wherein, the frequency point information of the target BS, which specifically comprises at least, frequency, such as, carry out SRS detections Frequency point information；

It can specifically include in the running time-frequency resource information of target BS, time-domain resource, match somebody with somebody such as SRS subframe Put, also include frequency domain resource, such as, frequency；Or include resource block (RB) in the running time-frequency resource information of target BS Information, such as, carry out the position of the resource block of SRS transmission.

On the basis of above-mentioned SRS configuration information, SRS configuration information can also include at least one of：SRS bands Width configuration (CSRS) parameter, SRS sub-frame configuration parameter, SRS and NAK/ACK whether simultaneously send instruction, TDD parameters.When So, above-mentioned SRS configuration information is merely illustrative, is not used to limit the specific configuration information of the present embodiment, that is to say, that this reality Applying can also be including the other specification outside above-mentioned parameter in the SRS of example offer configuration information.

Accordingly, the terminal device can the frequency point information based on target BS, or, have the target BS when Whether frequency resource information is same frequently to determine source base station and target BS, such as, the frequency and source base station of target BS can be utilized Frequency come determine whether with frequency.

The frequency point information of target BS is obtained in addition, or, a kind of scene of the running time-frequency resource information of the target BS For：

There is the frequency point information of target BS when not including in the configuration information for the SRS that target BS is sent, or, the mesh When marking the running time-frequency resource information of base station, the source base station can also obtain the frequency letter of above-mentioned target BS from target BS Breath, or, the running time-frequency resource information of the target BS；Embodiments thereof can be：

The configuration information for the SRS that detection target BS is sent, judge the frequency point information for wherein whether including target BS, Or including at least the running time-frequency resource information for having the target BS；If not including, sent to the target BS and obtain mesh The command information of the frequency point information of base station or the running time-frequency resource information of the target BS is marked, and receives the target BS Frequency point information or the target BS running time-frequency resource information.

On the basis of above-mentioned processing, source base station can be together with the configuration information of the SRS by the target BS Frequency point information, or, the running time-frequency resource information of the target BS is sent to the terminal device；

In addition, source base station can also by the frequency point information of the target BS, or, the running time-frequency resource of the target BS Information is added in the configuration information of the SRS and is sent to the terminal device.

Under this scene, terminal device follow-up processing flow as hereinbefore, is not discussed here.

The terminal device can determine that up work frequency corresponding to target BS by receiving SRS configuration information Rate determines to send SRS frequency, so as to ensure that target BS can when target BS and source base station alien frequencies work The SRS that terminal device is sent is received, in this way, avoiding the part industry caused by target BS can not receive SRS The situation of business delay.

The configuration information of the SRS based in switching command sends SRS, can be used for so that target BS passes through reception Quality of the terminal device in the up channel of different frequency range is estimated to SRS；And the SRS can cause target BS To estimate up timing, especially up Timing Advance (TA).

Specifically, above-mentioned transmission SRS can be the terminal device periodically send SRS or, acyclic hair Send SRS.For example when above-mentioned transmission SRS, different candidate base stations can be directed to and/or source base station sends SRS；One end End equipment can be sent out in the SRS of the equal configuration cycle property of each candidate base station transmission, also, for each candidate base station The SRS sent can use different configurations, still, the configuration for the SRS that one of configuration is necessarily sent based on target BS The SRS of information generation.

In addition, the sub-frame configuration on SRS, the SRS can be arranged in sub-frame of uplink most by the terminal device In the latter symbol.

It is pointed out that before performing step 11, before the switching command for receiving source base station and sending, methods described Also include：Data interaction is carried out with the source base station based on the first processing link；Accordingly, after performing step 11, the side Method also includes：Data interaction is carried out based on second processing link and target BS and retains the first processing link and institute State source base station and carry out data interaction.

Specifically, carrying out data interaction with the source base station based on the first processing link can include：Based on described One processing link, the switching command that source base station is sent is received, and data interaction is carried out with source base station.

It is described that SRS is sent based on second processing chain road direction target BS, and carry out data interaction with target.

The processing logic that can be specifically arranged on above-mentioned processing link in the terminal device processing unit, The effect for establishing two processing links is that one of processing link is handled for the information that source base station is sent and carried out anti- Feedback；Another processing link is directed to the information that target BS is sent and is handled and fed back.The method for building up for handling link can Think that processing unit distribution process resource exclusively carries out the information of source base station or target BS.Specifically distribute which resource is directed to The information of which base station is handled here without limiting.

So, it becomes possible to avoid the terminal device caused by handover operation from can not receiving business in the presence of a period of time The situation of data so that terminal device is when switching is performed, additionally it is possible to by keeping connecting to keep obtaining with source base station Business datum.

In such scheme, the target BS determines that TA processing mode can include based on the SRS：Target BS base In the characteristic that SRS is sent in the fixed time-domain position cycle, and binding signal detection algorithm obtains SRS and receives timing offset, i.e., should The uplink timing advance TA of terminal.

It should be noted that it is described receive that the source base station sends comprise at least the target BS indication signaling for having TA Afterwards, methods described also includes：

Based on the target BS indication signaling, target BS is determined；

Second processing link switching based on configuration is to the target BS, based on described in second processing link monitoring The control signaling that target BS issues；

Switching, which is sent, to the source base station completes information.

It is pointed out that described here switched over and monitored based on second processing link, specifically, based on second Processing link control Radio Resource switches to target BS, and receives target base by Radio Resource (such as physical channel) Control signaling is transferred to bottom layer treatment resource to be handled by the control signaling that station is sent by second processing link.

Accordingly, after source base station, which receives switching, completes information, the switching can also be completed letter by the source base station Breath is sent to target BS, to cause target BS to learn the switching state of terminal device, and is carried out with the terminal device Switching is completed in interaction, so as to which terminal device access target device carries out normal communication process.Specific communication process is here not Repeated again.

From the program as can be seen that this is in source cells (being specially source base station) and target cells (specially target Base station) between with frequency in the case of, in source cells UE send SRS, target cells may also detect that, but if in alien frequencies In the case of, SRS that source cells are sent is probably that invalid (target cells are not necessarily supported for target cells The frequency of source cells), therefore, the present embodiment can be avoided by the configuration of the target BS progress SRS by Target cell Traffic delay problem caused by the target BS of alien frequencies.

A flow example is provided below, referring to Fig. 2, including：

Step 21：Target cells be responsible for configure SRS, then by the SRS configuration informations pass to source cells (such as Received in target cells after source cells receive handover request, in handover request Source cells are passed in acknowledge)；

Step 22：The SRS configuration informations of target cells are notified UE (such as in handover by source cells Command is carried), after UE receives handover command, it is possible to which RF is switched into target cells based on receiving SRS configurations send SRS, and (according to existing procedure, network side will initiate data forwarding flows, while UE is received Processing link reset flows can be performed after RRCconnectionreconfiguration in handover command)；

At this moment in order to reduce interruption time delay, link reset should not be at this time performed, but uses double processing links to match somebody with somebody Put；

Step 23：After detection of the target cells based on the SRS determines TA, TA is notified into source cells；

Step 24：After source cells receive TA, then target cells are really switched to by the extra UE that signals It is (then complete after UE receives the signaling, then to source cells transmission RRCconnectionreconfiguratoincomplete The full target cells that are switched to monitor control signaling)；

Step 25：It is small that source cells send RRCconnectionreconfiguratoincomplete to target Area.

It can be seen that by using such scheme, terminal device can just get the configuration information that target BS is directed to SRS, And then the configuration information based on SRS sends SRS so that terminal device being capable of the configuration information based on the SRS that target BS is sent Configured to be directed to SRS, when being switched over so as to just reduce terminal device between source base station and target BS, by In the transmission delay of business datum caused by can not learning the corresponding configuration of target BS the problem of, mesh can be especially reduced Mark delay issue of the base station with source base station for the business datum in terminal device handoff procedure under the scene of alien frequencies work.

Further, since keep being directed to source base station in handoff procedure, while establishing the processing link for target BS Processing link communication, so as to avoid carrying out delay caused by business datum caused by the replacement of the protocol stack of layer two, so as to Terminal device receives the treatment effeciency of business datum in further lifting handoff procedure.

Embodiment two,

The embodiments of the invention provide a kind of switching method, applied to source base station, as shown in figure 3, methods described includes：

Step 31：Target BS is chosen for terminal device, receives the detection reference signal SRS that the target BS is sent Configuration information；

Step 32：At least the configuration information of the SRS is added in switching command, to described in terminal device transmission Switching command.

It is pointed out that before step 31 is performed, the source base station chosen for the terminal device it is small to target After the target BS in area, the source base station can also switch over preparation, such as, it can include：Source base station arrives to selection The target BS sends handover request, and after the confirmation of handover request of the target BS feedback is received, pin The distribution of downlink resource is carried out to the terminal device.

In above-mentioned switching command, include the SRS of target BS configuration configuration information；In addition, the switching refers to In order, switching command connects reconfiguration information by wireless heterogeneous networks (RRC, Radio Resource Control) and carried； The RRC connection reconfiguration informations are sent from target BS to the source base station, are not entered in specific generating mode the present embodiment Row limits.

It is understood that the frequency point information of target BS, or, including at least the running time-frequency resource for having the target BS The downlink working frequency of target BS or the difference with the downlink working frequency of source base station can also be included in information, be this In without the full detail included in frequency dependence parameter.

Accordingly, the terminal device can the frequency point information based on target BS, or, have the target BS when Whether frequency resource information is same frequently to determine source base station and target BS, such as, the up working frequency of target BS can be utilized Determine whether with the up frequency of source base station with frequency；Or can using the difference of the up working frequency of target BS come Judge whether with frequency, wherein, the difference of up working frequency can be that positive number can also be negative, when for zero when both then With frequency.

Accordingly, the terminal device can determine source base station and target base based on the frequency dependence parameter of target BS Whether stand with frequency, such as, it can determine to be using the up working frequency of target BS and the up working frequency of source base station No same frequency；Or can be judged whether using the difference of the up working frequency of target BS with frequency, wherein, up work The difference of frequency can be that positive number can also be negative, when for zero when then both with frequency.

Methods described also includes：Receive the Timing Advance that the target BS of the terminal device is sent；At least The Timing Advance is added to target BS indication signaling, the target BS indication signaling to the terminal is sent and sets It is standby.

Methods described also includes：Receive the switching that the terminal device is sent and complete information, letter is completed into the switching Breath is sent to the target BS.

From the program as can be seen that this is in the case of source cells and target minizones are with frequency, in source cells The SRS that UE is sent, target cells may also detect that, but if in the case of alien frequencies, SRS that source cells are sent for Target cells are probably invalid (target cells not necessarily support the frequency of source cells), therefore, the present embodiment By carrying out SRS configuration by the target BS of Target cell, traffic delay caused by the target BS of alien frequencies can be avoided to ask Topic.

Embodiment three,

The embodiments of the invention provide a kind of switching method, applied to target BS, as shown in figure 4, including：

Step 41：For terminal equipment configuration detection reference signal SRS configuration information；

Step 42：The configuration information of the SRS is sent to the source base station of the terminal device；

Step 43：The SRS that the terminal device is sent is detected, the terminal device is determined based on the SRS detected Corresponding TA, the TA is sent to the source base station of the terminal device.

It is pointed out that the terminal device also needs to perform the operation such as handover measurement, such as, it can include：It is described Terminal device can configure according to the measurement of source base station, and the reference signal sent at least one candidate base station measures, Obtain the signal measurement result at least one candidate base station to send to the source base station, to enable the source base station base Choose to obtain a target BS for the terminal device in the signal measurement result of at least one candidate base station.Certainly, It is to be appreciated that above are only a kind of embodiment that terminal device switches over measurement, can also include in actual treatment There are other handover measurements, without exhaustion in the present embodiment.

In the switching command that the source base station is sent, include the SRS of target BS configuration configuration information；This Outside, in the switching command, switching command connects weight by wireless heterogeneous networks (RRC, Radio Resource Control) Configuration information carries；The RRC connection reconfiguration informations are sent from target BS to the source base station, specific generating mode sheet Without limiting in embodiment.

Wherein, the frequency point information of the target BS, which specifically comprises at least, up frequency, such as, carry out SRS inspections The frequency point information of survey；

It can specifically include in the running time-frequency resource of target BS, time-domain resource, such as SRS sub-frame configuration, go back Include frequency domain resource, such as, up frequency.

Further, since keep being directed to source base station in handoff procedure, while establishing the processing link for target BS Processing link communication, so as to avoid carrying out handling delay caused by business datum caused by the replacement of link, so as to enter Terminal device receives the treatment effeciency of business datum in the lifting handoff procedure of one step.

Example IV,

The embodiments of the invention provide a kind of terminal device, as shown in figure 5, including：

Receiving unit 51, the switching command sent for receiving source base station, wherein, at least carried in the switching command The detection reference signal SRS of the target BS configuration of terminal device configuration information；Receive what the source base station was sent Including at least the target BS indication signaling for having TA；

Processing unit 54, for based in the target BS indication signaling TA determine complete with the target BS it Between uplink synchronous and switch to the target BS；

Information transmitting unit 52, SRS is sent for the configuration information based on the SRS in the switching command, wherein, it is described SRS is used to cause the target BS to detect timing advance TA；Based on the TA in the target BS indication signaling and institute Target BS is stated to synchronize and switch to the target BS.

Further, the source base station is described after the target BS to Target cell is chosen for the terminal device Source base station can also switch over preparation, such as, the target BS transmission handover request that source base station arrives to selection, and After the confirmation for receiving the handover request of the target BS feedback, point of downlink resource is carried out for the terminal device Match somebody with somebody.

It is pointed out that the terminal device also includes：Link management unit 53 is handled, for based on the first process chain Road carries out data interaction with the source base station；

And data interaction is carried out based on second processing link and target BS and keeps passing through first process chain Road carries out data interaction with the source base station.

So, it becomes possible to avoid the terminal device caused by handover operation from can not receiving business in the presence of a period of time The situation of data so that terminal device perform switch when, additionally it is possible to by with source base station keep processing link connection and Keep obtaining business datum.

The processing unit 54, for based on the target BS indication signaling, determining target BS；And based on configuration Second processing link switching is to the target BS, the control issued based on the second processing link monitoring target BS Signaling, send switching to the source base station and complete information.

Embodiment five,

The embodiments of the invention provide a kind of source base station, as shown in fig. 6, including：

Base station selection unit 61, for choosing target BS for terminal device；

Receiving unit 62, the detection reference signal SRS sent for receiving the target BS configuration information；

Transmitting element 63, at least the configuration information of the SRS to be added in switching command, to the terminal device Send the switching command.

It is pointed out that the base station selection unit 61 of the source base station, for arriving mesh for terminal device selection After the target BS for marking cell, the source base station can also switch over preparation, such as, the mesh that source base station arrives to selection Mark base station and send handover request, and after the confirmation of handover request of the target BS feedback is received, for described Terminal device carries out the distribution of downlink resource.

Need to describe in detail is the frequency dependence parameter of the target BS, can be the up work of at least target BS Working frequency or difference that can be between target BS and the upstream and downstream working frequency of the source base station；It is appreciated that It is the downlink working frequency or descending with source base station that can also include target BS in the frequency dependence parameter of target BS The difference of working frequency, simply here without the full detail included in frequency dependence parameter.

Receiving unit, the Timing Advance that the target BS for receiving the terminal device is sent；

Transmitting element, for the Timing Advance at least to be added into target BS indication signaling, send the target Base station indication signaling is to the terminal device.

Receiving unit, information is completed for receiving the switching that the terminal device is sent；

Transmitting element, sent for the switching to be completed into information to the target BS.

Embodiment six,

The embodiments of the invention provide a kind of target BS, as shown in fig. 7, comprises：

Dispensing unit 71, for the matching somebody with somebody for the detection reference signal SRS of Timing Advance detection for terminal equipment configuration Confidence ceases；The TA is sent to the source base station of the terminal device；

Transmitting element 72, for the configuration information of the SRS to be sent to the source base station of the terminal device；

Detecting signal unit 73, the SRS sent for detecting the terminal device, determined based on the SRS detected TA corresponding to the terminal device.

It is pointed out that receiving unit, letter is completed in the switching for the terminal device sent for receiving cell-of-origin Breath, it is synchronous with terminal device completion and carry out data interaction.

Embodiment seven,

The present embodiment provides a kind of switching system, as shown in figure 8, the switching method of the system includes：

Step 81：Source base station is that terminal device chooses target BS；

Step 82：The target BS of the terminal device is that the terminal equipment configuration detects for Timing Advance SRS configuration information；The configuration information of the SRS is sent to the source base station of the terminal device；

Step 83：The source base station receives the configuration information for the SRS that the target BS is sent, at least by the SRS Configuration information be added in switching command, send the switching command to the terminal device；

Step 84：The terminal device receives the switching command that the source base station is sent, wherein, in the switching command extremely The SRS of the target BS configuration of terminal device configuration information is carried less；Based on matching somebody with somebody for the SRS in the switching command Confidence breath sends SRS；

Step 85：The target BS detects the SRS that the terminal device is sent, and is determined based on the SRS detected TA corresponding to the terminal device, the TA is sent to the source base station of the terminal device, the source base station sends and comprised at least There is TA target BS indication signaling to the terminal device；

Step 86：The terminal device, which receives the target BS instruction for having TA that comprises at least that the source base station is sent, to be believed Order, the uplink synchronous between completion and the target BS is determined based on the TA in the target BS indication signaling and switched To the target BS.

Further, said system may refer to Fig. 9, including：

Source base station 91, for choosing target BS for terminal device；Receive the configuration for the SRS that the target BS is sent Information, at least the configuration information of the SRS is added in switching command, the switching command is sent to the terminal device； Send and comprise at least the target BS indication signaling for having TA to the terminal device；

Target BS 92, the configuration information of the SRS for being used for Timing Advance detection for terminal equipment configuration；By described in SRS configuration information is sent to the source base station of the terminal device；The SRS that the terminal device is sent is detected, based on detecting The SRS determine the terminal device corresponding to TA, send the TA to the source base station of the terminal device；

Terminal device 93, the switching command sent for receiving the source base station, wherein, at least taken in the switching command The SRS of target BS configuration with terminal device configuration information；Confidence is matched somebody with somebody based on the SRS in the switching command Breath sends SRS；Receive that the source base station sends comprises at least the target BS indication signaling for having TA, based on the target base The TA in indication signaling that stands determines the uplink synchronous completed between the target BS and switches to the target BS.

If the module integrated described in the embodiment of the present invention is realized in the form of software function module and is used as independent production Product are sold or in use, can also be stored in a computer read/write memory medium.It is real based on such understanding, the present invention The part that the technical scheme of example substantially in other words contributes to prior art is applied to embody in the form of software product Come, the computer software product is stored in a storage medium, including some instructions are make it that a computer equipment (can To be personal computer, the network equipment or network equipment etc.) perform whole or the portion of each embodiment methods described of the present invention Point.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only Memory), deposit at random Access to memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can be with the medium of store program codes. So, the embodiment of the present invention is not restricted to any specific hardware and software combination.

The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.

Claims

1. a kind of switching method, applied to terminal device, it is characterised in that methods described includes：

The switching command sent of source base station is received, wherein, the target of the terminal device is at least carried in the switching command The detection reference signal SRS of base station configuration configuration information；

Configuration information based on the SRS in the switching command sends SRS, wherein, the SRS is used to cause the target BS Detect timing advance TA；

Receive that the source base station sends comprises at least the target BS indication signaling for having TA, is indicated based on the target BS TA in signaling determines the uplink synchronous completed between the target BS and switches to the target BS.

2. according to the method for claim 1, it is characterised in that before the switching command for receiving source base station and sending, institute Stating method also includes：

Data interaction is carried out with the source base station based on the first processing link；

Accordingly, after the switching command for receiving source base station and sending, methods described also includes：

Based on second processing link and target BS carry out data interaction and keep by the described first processing link with it is described Source base station carries out data interaction.

3. according to the method for claim 1, it is characterised in that it is described receive that the source base station sends comprise at least and have After TA target BS indication signaling, methods described also includes：

Based on the target BS indication signaling, target BS is determined；

Second processing link switching based on configuration monitors the target to the target BS based on the second processing link The control signaling that base station issues；

Switching, which is sent, to the source base station completes information.

4. a kind of switching method, applied to source base station, it is characterised in that methods described includes：

Target BS is chosen for terminal device, receives the configuration information for the detection reference signal SRS that the target BS is sent；

At least the configuration information of the SRS is added in switching command, the switching command is sent to the terminal device.

5. according to the method for claim 4, it is characterised in that methods described also includes：

Receive the TA that the target BS of the terminal device is sent；

The TA is at least added to target BS indication signaling, the target BS indication signaling to the terminal is sent and sets It is standby；

Receive the switching that the terminal device is sent and complete information, the switching is completed into information sends to the target base Stand.

6. a kind of switching method, applied to target BS, it is characterised in that methods described includes：

For terminal equipment configuration detection reference signal SRS configuration information；

The SRS that the terminal device is sent is detected, TA corresponding to the terminal device is determined based on the SRS detected, is sent out The TA is sent to the source base station of the terminal device.

7. according to the method for claim 6, it is characterised in that methods described also includes：

Information is completed in the switching for receiving the terminal device that cell-of-origin is sent, and completes to switch and carry out with the terminal device Data interaction.

8. a kind of terminal device, it is characterised in that the terminal device includes：

Receiving unit, the switching command sent for receiving source base station, wherein, the end is at least carried in the switching command The SRS of the target BS configuration of end equipment configuration information；Receive that the source base station sends comprises at least the target for having TA Base station indication signaling；

Processing unit, for determining to complete between the target BS based on the TA in the target BS indication signaling Row is synchronous and switches to the target BS；

Information transmitting unit, SRS is sent for the configuration information based on the SRS in the switching command, wherein, the SRS is used TA is detected in causing the target BS.

9. terminal device according to claim 8, it is characterised in that the terminal device also includes：

Link management unit is handled, for carrying out data interaction with the source base station based on the first processing link；

And based on second processing link and target BS carry out data interaction and keep by the described first processing link with The source base station carries out data interaction.

10. terminal device according to claim 8, it is characterised in that

The processing unit, for based on the target BS indication signaling, determining target BS；And at second based on configuration Link switching is managed to the target BS, the control signaling issued based on the second processing link monitoring target BS, Switching, which is sent, to the source base station completes information.

A kind of 11. source base station, it is characterised in that including：

Base station selection unit, for choosing target BS for terminal device；

Transmitting element, at least the configuration information of the SRS to be added in switching command, institute is sent to the terminal device State switching command.

12. source base station according to claim 11, it is characterised in that

Receiving unit, the Timing Advance that the target BS for receiving the terminal device is sent；Receive described Information is completed in the switching that terminal device is sent；

Transmitting element, for the Timing Advance at least to be added into target BS indication signaling, send the target BS Indication signaling is to the terminal device；The switching is completed into information to send to the target BS.

A kind of 13. target BS, it is characterised in that including：

Dispensing unit, the configuration information of the SRS for being used for Timing Advance detection for terminal equipment configuration；Send the TA extremely The source base station of the terminal device；

Detecting signal unit, the SRS sent for detecting the terminal device, the end is determined based on the SRS detected TA corresponding to end equipment.

14. target BS according to claim 13, it is characterised in that

Receiving unit, information is completed in the switching for the terminal device sent for receiving cell-of-origin, with the terminal device Complete synchronization and carry out data interaction.

15. a kind of switching method, it is characterised in that methods described includes：

Source base station is that terminal device chooses target BS；

The target BS of the terminal device is the configuration for the SRS that the terminal equipment configuration is used for Timing Advance detection Information；The configuration information of the SRS is sent to the source base station of the terminal device；

The source base station receives the configuration information for the SRS that the target BS is sent, and at least adds the configuration information of the SRS Add in switching command, the switching command is sent to the terminal device；

The terminal device receives the switching command that the source base station is sent, wherein, at least carried in the switching command State the SRS of the target BS configuration of terminal device configuration information；Configuration information based on the SRS in the switching command is sent SRS；

The target BS detects the SRS that the terminal device is sent, and the terminal device is determined based on the SRS detected Corresponding TA, the TA is sent to the source base station of the terminal device, the source base station transmission is including at least the target base for having TA Indication signaling stand to the terminal device；

What the terminal device received that the source base station sends comprises at least the target BS indication signaling for having TA, based on described TA in target BS indication signaling determines the uplink synchronous completed between the target BS and switches to the target base Stand.

16. a kind of switching system, it is characterised in that the system includes：

Source base station, for choosing target BS for terminal device；The configuration information for the SRS that the target BS is sent is received, At least the configuration information of the SRS is added in switching command, the switching command is sent to the terminal device；Send extremely Include TA target BS indication signaling less to the terminal device；

Target BS, the configuration information of the SRS for being used for Timing Advance detection for terminal equipment configuration；By the SRS's Configuration information is sent to the source base station of the terminal device；The SRS that the terminal device is sent is detected, described in detecting SRS determine the terminal device corresponding to TA, send the TA to the source base station of the terminal device；

Terminal device, the switching command sent for receiving the source base station, wherein, at least carried in the switching command State the SRS of the target BS configuration of terminal device configuration information；Configuration information based on the SRS in the switching command is sent SRS；Receive that the source base station sends comprises at least the target BS indication signaling for having TA, is indicated based on the target BS TA in signaling determines the uplink synchronous completed between the target BS and switches to the target BS.