Embodiment
In order to reduce the signaling consumption of PDCCH, the embodiment of the present invention provides a kind of method triggering Stochastic accessing, in this method, Stochastic accessing relevant parameter is carried in base station in the cell configuration signaling sent, then activation/deactivation signaling is sent, with indicating terminal according to described Stochastic accessing relevant parameter initiating random access procedure to terminal.
See Fig. 3, the method for the triggering Stochastic accessing that the embodiment of the present invention provides, comprises the following steps:
Step 30: base station sends cell configuration signaling to terminal, carries Stochastic accessing relevant parameter in described cell configuration signaling; This cell configuration signaling can be RRC signaling.
Step 31: base station sends the activation/deactivation signaling for the community of described cell configuration signal deployment, with indicating terminal according to described Stochastic accessing relevant parameter initiating random access procedure to terminal.
In step 30, in described cell configuration signaling, carry the Stochastic accessing relevant parameter of all allocating cells; Or, carry in described cell configuration signaling in the TA group belonging to each community of configuration for initiating the Stochastic accessing relevant parameter of the specific cell of Stochastic accessing.Any one community that can preset in TA group is for initiating the specific cell of Stochastic accessing in this TA group.
Preferably, the indication information needing the community of initiating Stochastic accessing is also carried in described activation/deactivation signaling; Or,
Random access lead code mark (preamble index) and Physical Random Access Channel mask identifier (PRACH mask index) needing the indication information of the community of initiating Stochastic accessing and use at this community initiation Stochastic accessing is also carried in described activation/deactivation signaling; Or,
The preamble index that the community initiation Stochastic accessing that being also carried in described activation/deactivation signaling needs to initiate Stochastic accessing uses and PRACH mask index; This needs the community of initiating Stochastic accessing can be described specific cell; Or,
The preamble index that the community initiation Stochastic accessing that being also carried at this signaling in described activation/deactivation signaling needs to activate or newly activate uses and PRACH mask index; These needs activate or the new community activated can be one or more.
Preferably, when to carry in the TA group belonging to each community of configuration for initiating the Stochastic accessing relevant parameter of the specific cell of Stochastic accessing in described cell configuration signaling, if be in unactivated state for the specific cell of initiating Stochastic accessing, then the activation cell indicated by described activation/deactivation signaling comprises this for initiating the specific cell of Stochastic accessing.
In this method, described Stochastic accessing relevant parameter can comprise: PRACH configuration information and Stochastic accessing preamble relevant information etc.Terminal can determine the position of initiating the PRACH resource that random access procedure uses according to PRACH configuration information, determines the preamble sent according to Stochastic accessing preamble relevant information.Described activation/deactivation signaling can be activation/deactivation MAC CE etc.
See Fig. 4, the embodiment of the present invention also provides a kind of method triggering Stochastic accessing, comprises the following steps:
Step 40: terminal receives the cell configuration signaling that base station sends, and carries Stochastic accessing relevant parameter in described cell configuration signaling;
Step 41: terminal receives the activation/deactivation signaling of the community for described cell configuration signal deployment that base station sends, according to described Stochastic accessing relevant parameter initiating random access procedure, to obtain the up TA of the community that described activation/deactivation signaling activates.
As a kind of execution mode, in described cell configuration signaling, carry the Stochastic accessing relevant parameter of all allocating cells; Accordingly, in step 41, terminal is according to described Stochastic accessing relevant parameter initiating random access procedure, and to obtain the up TA of the community that described activation/deactivation signaling activates, its specific implementation can be as follows:
Terminal is according to described activation/deactivation signaling determination base station activation or the new community activated;
Terminal, for each community determined, according to Stochastic accessing relevant parameter initiating random access procedure on this community of this community, to obtain the up TA of this community, and uses this up TA to carry out uplink in this community.Concrete:
Terminal is for each community determined, if be not carried at this community in described activation/deactivation signaling to initiate the preamble index that uses of Stochastic accessing and PRACH mask index, then terminal is initiated to compete random access procedure, to obtain the up TA of this community according to the Stochastic accessing relevant parameter of this community on this community;
The preamble index and PRACH mask index that use at this community initiation Stochastic accessing if carry in described activation/deactivation signaling, then terminal determines it is initiate competition random access procedure or non-competing random access procedure according to the value of this preamble index, and on this community, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of this community according to determination result.Such as, if the value of preamble index is complete zero, then determine to initiate competition random access procedure, otherwise, determine to initiate non-competing random access procedure.
As another kind of execution mode, in described cell configuration signaling, carry the Stochastic accessing relevant parameter of all allocating cells; Accordingly, in step 41, terminal is according to described Stochastic accessing relevant parameter initiating random access procedure, and to obtain the up TA of the community that described activation/deactivation signaling activates, its specific implementation can be as follows:
Terminal is according to described activation/deactivation signaling determination base station activation or the new community (being called activation cell) activated;
Terminal, for each community determined, judges whether comprise the community having set up uplink synchronous in the TA group belonging to this community;
Terminal is for the community be respectively judged as NO (not comprising the activation cell of the community having set up uplink synchronous in the TA group namely), according to the Stochastic accessing relevant parameter of this community at this community initiating random access procedure, to obtain the up TA of this community, and this up TA is used to carry out uplink in this community; Or, terminal is for the TA group belonging to the community be respectively judged as NO, a base station activation or the new community activated is chosen in this TA group, and according to the Stochastic accessing relevant parameter of the community chosen at the community initiating random access procedure that this is chosen, to obtain the up TA of TA group belonging to this community chosen, and use this up TA other communities in the TA group belonging to the community that the community that this is chosen and this are chosen, carry out transmitting uplink data.
Concrete, above-mentioned terminal is for the community be respectively judged as NO, and according to the Stochastic accessing relevant parameter of this community at this community initiating random access procedure, to obtain the up TA of this community, specific implementation can be as follows:
For the community be respectively judged as NO, if be not carried at this community in described activation/deactivation signaling to initiate the preamble index that uses of Stochastic accessing and PRACH mask index, then terminal is initiated to compete random access procedure, to obtain the up TA of this community according to the Stochastic accessing relevant parameter of this community on this community;
The preamble index and PRACH mask index that use at this community initiation Stochastic accessing if carry in described activation/deactivation signaling, then terminal determines it is initiate competition random access procedure or non-competing random access procedure according to the value of this preamble index, and on this community, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of this community according to determination result.
Above-mentioned terminal is according to the Stochastic accessing relevant parameter of the community chosen at the community initiating random access procedure that this is chosen, and to obtain the up TA of TA group belonging to this community chosen, specific implementation can be as follows:
The preamble index that the community initiation Stochastic accessing chosen if be not carried in described activation/deactivation signaling uses and PRACH mask index, the Stochastic accessing relevant parameter of community that then terminal is chosen according to this initiates to compete random access procedure, to obtain the up TA of TA group belonging to this community chosen on this community;
The preamble index and PRACH mask index that use at the community initiation Stochastic accessing chosen if carry in described activation/deactivation signaling, then terminal determines it is initiate competition random access procedure or non-competing random access procedure according to the value of this preamble index, and on the community chosen, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of TA group belonging to this community chosen according to determination result.
Concrete, above-mentioned terminal chooses a base station activation or the new community activated in TA group, and its specific implementation can be as follows:
Terminal is according to the Stochastic accessing community selection rule preset, and such as random selecting rule, chooses a base station activation or the new community activated in TA group; Or,
Terminal, according to the Stochastic accessing community indication information carried in described activation/deactivation signaling, chooses the community indicated by a described Stochastic accessing community indication information in TA group.
Preferably, terminal can for the community be respectively judged as YES (comprising the activation cell of the community setting up uplink synchronous in the TA group namely), obtain the up TA having set up the community of uplink synchronous in the TA group belonging to this community, using the up TA of this TA as the community be judged as YES, this TA is namely used to carry out uplink in the community be judged as YES.
As the third execution mode, carry in described cell configuration signaling in the TA group belonging to each community of configuration for initiating the Stochastic accessing relevant parameter of the specific cell of Stochastic accessing; Accordingly, in step 41, terminal is according to described Stochastic accessing relevant parameter initiating random access procedure, and to obtain the up TA of the community that described activation/deactivation signaling activates, its specific implementation can be as follows:
Terminal is according to described activation/deactivation signaling determination base station activation or the new community activated;
Terminal is for the TA group belonging to each community determined, determine whether establish uplink synchronous for the specific cell of initiating Stochastic accessing in this TA group, when being defined as no, according to the Stochastic accessing relevant parameter of this specific cell at this specific cell initiating random access procedure, to obtain the up TA of this specific cell, and the community of this up TA in the TA group belonging to this specific cell is used to carry out uplink.
Concrete, above-mentioned terminal is according to the Stochastic accessing relevant parameter of this specific cell at this specific cell initiating random access procedure, and to obtain the up TA of this specific cell, specific implementation can be as follows:
If be not carried at this specific cell in described activation/deactivation signaling to initiate the preamble index that uses of Stochastic accessing and PRACH mask index, then terminal is initiated to compete random access procedure, to obtain the up TA of this specific cell according to the Stochastic accessing relevant parameter of this specific cell on this specific cell;
The preamble index and PRACH mask index that use at this specific cell initiation Stochastic accessing if carry in described activation/deactivation signaling, then terminal determines it is initiate competition random access procedure or non-competing random access procedure according to the value of this preamble index, and on this specific cell, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of this specific cell according to determination result.
Preferably, when determining to have established uplink synchronous for the specific cell of initiating Stochastic accessing in TA group, terminal can obtain the up TA of this specific cell, using the up TA of this TA as the base station activation in TA group belonging to this specific cell or the new community activated, this TA other communities in TA group belonging to this specific cell are namely used to carry out uplink.
Preferably, before the specific cell initiating random access procedure for initiating Stochastic accessing, if terminal determines that this specific cell is in unactivated state, then activate this specific cell.
In this method, for Frequency Division Duplexing (FDD) (FDD) system, the subframe initiating random access procedure of terminal after subframe n+8 or subframe n+8; Or, for time division duplex (TDD) system, the sub-frame of uplink initiating random access procedure of terminal after sub-frame of uplink n+K or subframe n+K; Described n is subframe numbers when receiving described activation/deactivation signaling; The value of described K is determined, specifically see the description of agreement TS36.213 according to system frame structure and hybrid automatic repeat-request two-way time (HARQ RTT).
Described Stochastic accessing relevant parameter comprises: PRACH configuration information and Stochastic accessing preamble relevant information; Described activation/deactivation signaling is: activation/deactivation MAC CE.
Below the present invention is specifically described:
The present invention gives a kind of method utilizing carrier activation/deexcitation signaling triggering terminal to carry out Stochastic accessing, namely once terminal receives the activation/deactivation MAC CE that base station sends, then judge whether to need to initiate Stochastic accessing on the carrier wave of correspondence according to this MAC CE, to obtain the new Timing Advance activated on carrier wave.
Specifically can there is following several mode:
Method 1:
Base station side:
When base station is the set of cells of terminal configuration polymerization by RRC signaling, need the Stochastic accessing relevant parameter (comprising some common configuration information of PRACH configuration information and Stochastic accessing, such as preamble information etc.) carrying all allocating cells;
End side:
Once receive the carrier activation/deexcitation MAC CE of base station transmission, then judge base station activation according to this MAC CE or newly have activated which community, and on these communities, adopt serial or parallel mode to initiate Stochastic accessing, thus set up uplink synchronous according to the up TA obtained.
For method 1, activation/deactivation MAC CE can also expand, the preamble index that the community initiation Stochastic accessing that being carried in MAC CE needs to activate or newly activate uses and PRACHmask index.
Method 2:
Base station side:
When base station is the set of cells of terminal configuration polymerization by RRC signaling, need the Stochastic accessing relevant parameter (comprising some common configuration information of PRACH configuration information and Stochastic accessing, such as preamble information etc.) carrying all allocating cells;
End side:
Once receive the carrier activation/deexcitation MAC CE of base station transmission, after terminal judges carrier activation/deexcitation MAC CE activates or newly have activated which community, can judge in the TAgroup that these communities belong to, whether had community to establish uplink synchronous, if had, so with this TA group in set up uplink synchronous community use identical TA, if do not had, judge that these activate or new activation cell belongs to several TA group, in a TA group, only need selection community to initiate Stochastic accessing.
For method 2, carrier activation/deexcitation MAC CE that base station sends can expand, the preamble index carrying community instruction and/or need the community of initiating Stochastic accessing to use and PRACH maskindex, initiates Stochastic accessing to indicate needs on which community and whether this Stochastic accessing is the non-competing Stochastic accessing that base station indicates.
MAC CE form after expansion can have following several mode, should be noted that the MAC CE form in order to distinguish before this MACCE and R10, needs for it introduces new Logic Channel Identifier (LCID).
Form 1:MAC CE only carries Stochastic accessing community indication information, bit mapping (bitmap) mode can be adopted to indicate or directly carry the cell number needing to initiate Stochastic accessing.
As shown in Figure 5A, for bitmap, in this extended MAC CE, first character joint represents the cell information of activation/deactivation, identical with the byte 1 in Fig. 1; Second byte represents community indication information, and in such as second byte, Ci gets 1, then represent to initiate Stochastic accessing on SCelli.
Stochastic accessing community indication information and preamble index and PRACH mask index indication information is carried in form 2:MAC CE.Preamble index and PRACH mask index uses 2 system bit to indicate, and preamble index can use 6bit to represent, PRACH mask index can use 4bit to indicate.If indicate multiple community simultaneously, so can carry many group preamble index and PRACHmask index, in MAC CE each to initiate the cell of Stochastic accessing corresponding preamble index and PRACH mask index can according to a definite sequence sequence.
Only have one for the cell that will initiate Stochastic accessing, a kind of possible MAC CE form as shown in Figure 5 B.Certainly, if only have a community to initiate Stochastic accessing, so also can omit the bitmap being used to indicate and needing to initiate Stochastic accessing community, directly utilize the R bit before preamble index or PRACH maskindex to indicate the community will initiating Stochastic accessing.
Ten thousand methods 3:
Base station side:
When base station is the set of cells of terminal configuration polymerization by RRC signaling, only selects a community as the community of initiating Stochastic accessing to each TA group, be called for short RACH community.
Further optimization, the RACH community of this TAgroup, once will activate the community in this TA group, first should be activated in base station.
End side:
Once terminal receives carrier activation/deexcitation MAC CE that base station sends, then judge base station activation according to this MAC CE or newly have activated which community, and judge whether the RACH community in the TA group at these places, community establishes uplink synchronous, if establish uplink synchronous, then in this TA group, the new community activated does not need to initiate Stochastic accessing again, the direct use TA the same with RACH community in the TA group of own home carries out uplink, otherwise Stochastic accessing is initiated in the RACH community of TA group that belongs in this community of terminal.In different TA group, the random access procedure of RACH community can be serial, also can be parallel.
Similar with method 2, this activation/deactivation MAC CE also can expand, carry the preamble index of community and PRACH mask index that need to initiate Stochastic accessing, this need the community of initiating Stochastic accessing can be needs activate or new activation community in RACH community.With Fig. 5 category-B seemingly, instruction needs that row bitmap of community initiating Stochastic accessing not need.
So-called parallel initiation Stochastic accessing in said method, on multiple community, initiate Stochastic accessing exactly, Stochastic accessing is initiated in so-called serial simultaneously, and namely on Deng Yige community, Stochastic accessing initiates Stochastic accessing in next community after completing again.If Stochastic accessing adopts serial mode, the order that Stochastic accessing is initiated in each community depends on that UE realizes, such as according to cell number ascending order or descending.In this patent, each message of random access procedure can be transmitted on same community, does not carry out across carrier dispatching.
In said method, Stochastic accessing is initiated moment needs consideration and is activated timing relationship, that is:
For FDD system, if terminal receives activation/deactivation signaling at subframe n, so Stochastic accessing can be initiated in the subframe n+8 moment the earliest;
For TDD system, if terminal receives activation/deactivation signaling at subframe n, so Stochastic accessing can be initiated at the sub-frame of uplink being numbered n+K the earliest, and K is according to TDD system frame structure determination value.
Embodiments of the invention are as follows:
If base station is terminal be configured with at most five aggregation cell, be respectively community 1, community 2, community 3, community 4 and community 5.Its small area 1 and community 2 belong to same TA group, are designated as TA group 1; Community 3 and community 4 belong to a TA group, are designated as TA group2; Community 5 belongs to alone a TAgroup, is designated as TA group 3.
Embodiment one (corresponding method 1):
Step 1: terminal is access base station on community 1, community 1 is called PCell;
Step 2: base station is according to the data volume of terminal, determine to need for newly-increased 3 communities of terminal, be respectively community 2, community 3 and community 4, then RRC signaling is passed through by these cell configuration to terminal in base station, RRC signaling needs to comprise the Stochastic accessing relevant information on each new allocating cell, such as the information such as PRACH configuration and preamble configuration.
Step 3: because the community acquiescence of configuration is in deactivation status, before therefore will carrying out transfer of data on these communities, base station needs to be activated these communities by sending activation/deactivation MAC CE to UE.
Step 4: terminal receives activation/deactivation MAC CE, judge which activates or the new community activated according to this MAC CE, for activating or the new community activated, terminal needs the preamble index used according to the community initiation Stochastic accessing whether being included in activation or new activation in MAC CE, the value of the preamble index of PRACH mask index and instruction is determined to initiate competition Stochastic accessing or non-competing Stochastic accessing, and initiate competition Stochastic accessing or non-competing Stochastic accessing according to determination result, to obtain the uplink timing advance activated or on new activation cell.Random access procedure on multiple activation or newly activation cell can walk abreast or serial is carried out.
Step 5: after terminal obtains the uplink timing advance on above-mentioned activation or new activation cell, corresponding uplink timing advance just can be used to carry out corresponding transmitting uplink data.
Embodiment two (corresponding method 2):
Step 1: terminal is access base station on community 1, community 1 is called PCell;
Step 2: base station is according to the data volume of terminal, determine to need for newly-increased 3 communities of terminal, be respectively community 2, community 3 and community 4, then RRC signaling is passed through by these cell configuration to terminal in base station, RRC signaling needs to comprise the Stochastic accessing relevant information on each new allocating cell, such as the information such as PRACH configuration and preamble configuration.
Step 3: because the community acquiescence of configuration is in deactivation status, before therefore will carrying out transfer of data on these communities, base station needs to be activated these communities by sending activation/deactivation MAC CE to UE.
Optionally, in activation/deactivation MAC CE, community indication information can also be carried, need to indicate those communities to initiate Stochastic accessing.
Step 4: terminal receives activation/deactivation MAC CE, set up uplink synchronous according to whether there being community in the TAgroup that new activation cell belongs to judge whether to need to trigger Stochastic accessing, such as the new community 2 activated, owing to belonging to same TA with community 1, so community 2 does not need to initiate RACH again, community 1 and community 2 use identical TA to carry out uplink, and for community 3 and community 4, uplink synchronous is set up owing to not having community in the TA group of its ownership, and this Liang Ge community belongs to same TA group, therefore terminal voluntarily or can indicate according to MAC CE and select a community from community 3 and community 4, then the preamble index of Stochastic accessing use is initiated according to the community whether being included in selection in MAC CE, the value of the preamble index of PRACH mask index and instruction is determined to initiate competition Stochastic accessing or non-competing Stochastic accessing, and on the community selected, initiate competition random access procedure or non-competing random access procedure according to determination result, once the Stochastic accessing of this community completes, so another community can use the up TA identical with this community to carry out uplink.Random access procedure in multiple TA group can be serial or parallel to carry out.
Step 5: after terminal obtains the uplink timing advance on above-mentioned activation or new activation cell, corresponding uplink timing advance just can be used to carry out corresponding transmitting uplink data.
Embodiment three (corresponding method 3):
Step 1: terminal is access base station on community 1, community 1 is called PCell;
Step 2: according to the data volume of terminal, base station is determined to need, for newly-increased 4 communities of terminal, to be respectively community 2, community 3, community 4 and community 5.Because PCell in the TA group that community 2 belongs to is RACH community, in the TA group that community 3 and community 4 belong to, community 4 is RACH community, community 5 belongs to alone a TA group, and therefore base station is that terminal increases newly in the RRC signaling of community and only needs to carry the Stochastic accessing relevant information on community 4 and community 5.
Step 3: because the community acquiescence of configuration is in deactivation status, before therefore will carrying out transfer of data on these communities, base station needs to be activated these communities by sending activation/deactivation MAC CE to UE.
According to this MAC CE, step 4: terminal receives activation/deactivation MAC CE, judges which activates or the new community activated, for the new community 2 activated owing to belonging to a TA group with PCell, therefore can use identical TA with PCell; And for belonging to community 3 and the community 4 of same TA group, because Zhi Wei community 4 configures Stochastic accessing relevant information, therefore can determine to initiate competition Stochastic accessing or non-competing Stochastic accessing according to the value of preamble index whether being included in community 4 in MAC CE and initiating preamble index, PRACH mask index that Stochastic accessing uses and instruction, and on community 4, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of this TA group according to determination result.For community 5, then need to initiate Stochastic accessing on community 5, obtain the up TA of this TA group.Should be noted that the Stochastic accessing on community 4 and community 5 can be parallel initiation or serial initiation.
Step 5: after terminal obtains the uplink timing advance on above-mentioned new activation cell, just can use corresponding uplink timing advance to carry out corresponding transmitting uplink data.
Should be noted that in the present embodiment, if base station is when activating certain community in certain TA group in step 4, RACH community in this TA group is not activated, and so terminal needs to initiate Stochastic accessing in this RACH community, therefore also just means that implicit expression have activated this RACH community.
See Fig. 6, the embodiment of the present invention also provides a kind of wireless communication system, and this system comprises:
Base station 60, for sending cell configuration signaling to terminal, carries Stochastic accessing relevant parameter in described cell configuration signaling; The activation/deactivation signaling for the community of described cell configuration signal deployment is sent, with indicating terminal according to described Stochastic accessing relevant parameter initiating random access procedure to terminal;
Terminal 61, for receiving the cell configuration signaling that base station sends; Receive the activation/deactivation signaling of the community for described cell configuration signal deployment that base station sends, according to described Stochastic accessing relevant parameter initiating random access procedure, to obtain the uplink timing advance TA of the community that described activation/deactivation signaling activates.
See Fig. 7, the embodiment of the present invention also provides a kind of device triggering Stochastic accessing, and this device comprises:
Dispensing unit 70, for sending cell configuration signaling to terminal, carries Stochastic accessing relevant parameter in described cell configuration signaling;
Activate unit 71, for sending the activation/deactivation signaling for the community of described cell configuration signal deployment to terminal, with indicating terminal according to described Stochastic accessing relevant parameter initiating random access procedure.
The Stochastic accessing relevant parameter of all allocating cells is carried in described cell configuration signaling; Or,
Carry in described cell configuration signaling in the timing advance TA group belonging to each community of configuration for initiating the Stochastic accessing relevant parameter of the specific cell of Stochastic accessing.
Also carry the indication information that needs the community of initiating Stochastic accessing in described activation/deactivation signaling and/or initiate the preamble index that uses of Stochastic accessing and PRACH mask index in this community; Or,
The preamble index that the community initiation Stochastic accessing that being also carried in described activation/deactivation signaling needs to activate or newly activate uses and PRACH mask index.
Described activation unit 71 for:
When carrying the Stochastic accessing relevant parameter of the Random Access Channel RACH community in the TA group belonging to each community of configuration in described cell configuration signaling, the activation cell indicated by described activation/deactivation signaling comprises the specific cell for initiating Stochastic accessing.
Described Stochastic accessing relevant parameter comprises:
Physical Random Access Channel PRACH configuration information and random access lead code preamble relevant information.
Described activation/deactivation signaling is: activation/deactivation medium education control unit MAC CE.
See Fig. 8, the embodiment of the present invention also provides a kind of device of initiating Stochastic accessing, and this device comprises:
Receiving element 80, for receiving the cell configuration signaling that base station sends, carries Stochastic accessing relevant parameter in described cell configuration signaling;
Access unit 81, for receiving the activation/deactivation signaling of the community for described cell configuration signal deployment that base station sends; According to described Stochastic accessing relevant parameter initiating random access procedure, to obtain the uplink timing advance TA of the community that described activation/deactivation signaling activates.
Described access unit 81 for:
When carrying the Stochastic accessing relevant parameter of all allocating cells in described cell configuration signaling, according to described activation/deactivation signaling determination base station activation or the new community activated; For each community determined, according to Stochastic accessing relevant parameter initiating random access procedure on this community of this community, to obtain the up TA of this community.
Described access unit 81 for:
When carrying the Stochastic accessing relevant parameter of all allocating cells in described cell configuration signaling, according to described activation/deactivation signaling determination base station activation or the new community activated;
For each community determined, judge whether comprise the community having set up uplink synchronous in the TA group belonging to this community;
For the community be respectively judged as NO, according to the Stochastic accessing relevant parameter of this community at this community initiating random access procedure, to obtain the up TA of this community; Or, for the TA group belonging to the community be respectively judged as NO, a base station activation or the new community activated is chosen in this TA group, and according to the Stochastic accessing relevant parameter of the community chosen at the community initiating random access procedure that this is chosen, to obtain the up TA of TA group belonging to this community chosen.
Described access unit 81 for:
If be not carried at this community in described activation/deactivation signaling to initiate the preamble index that uses of Stochastic accessing and PRACH mask index, then initiate to compete random access procedure, to obtain the up TA of this community on this community according to the Stochastic accessing relevant parameter of this community;
The preamble index and PRACH mask index that use at this community initiation Stochastic accessing if carry in described activation/deactivation signaling, then determine it is initiate competition random access procedure or non-competing random access procedure according to the value of this preamble index, and on this community, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of this community according to determination result.
Described access unit 81 for:
The preamble index that the community initiation Stochastic accessing chosen if be not carried in described activation/deactivation signaling uses and PRACH mask index, then initiate to compete random access procedure, to obtain the up TA of TA group belonging to this community chosen on this community according to the Stochastic accessing relevant parameter of this community chosen;
The preamble index and PRACH mask index that use at the community initiation Stochastic accessing chosen if carry in described activation/deactivation signaling, then determine it is initiate competition random access procedure or non-competing random access procedure according to the value of this preamble index, and on the community chosen, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of TA group belonging to this community chosen according to determination result.
Described access unit 81 for:
According to the Stochastic accessing community selection rule preset, in this TA group, choose a base station activation or the new community activated; Or,
According to the Stochastic accessing community indication information carried in described activation/deactivation signaling, in this TA group, choose the community indicated by a described Stochastic accessing community indication information.
Described access unit 81 also for:
For the community be respectively judged as YES, obtain the up TA having set up the community of uplink synchronous in the TA group belonging to this community, using the up TA of this TA as the community be judged as YES.
Described access unit 81 also for:
When to carry in the TA group belonging to each community of configuration for initiating the Stochastic accessing relevant parameter of the specific cell of Stochastic accessing in described cell configuration signaling, according to described activation/deactivation signaling determination base station activation or the new community activated;
For the TA group belonging to each community determined, determine whether establish uplink synchronous for the specific cell of initiating Stochastic accessing in this TA group, when being defined as no, according to the Stochastic accessing relevant parameter of this specific cell at this specific cell initiating random access procedure, to obtain the up TA of this specific cell.
Described access unit 81 for:
If be not carried at this specific cell in described activation/deactivation signaling to initiate the preamble index that uses of Stochastic accessing and PRACH mask index, then initiate to compete random access procedure, to obtain the up TA of this specific cell on this specific cell according to the Stochastic accessing relevant parameter of this specific cell;
The preamble index and PRACH mask index that use at this specific cell initiation Stochastic accessing if carry in described activation/deactivation signaling, then determine it is initiate competition random access procedure or non-competing random access procedure according to the value of this preamble index, and on this specific cell, initiate competition random access procedure or non-competing random access procedure, to obtain the up TA of this specific cell according to determination result.
Described access unit 81 also for:
When determining to have established uplink synchronous for the specific cell of initiating Stochastic accessing in TA group, obtain the up TA of this specific cell, using the up TA of this TA as the base station activation in TA group belonging to this specific cell or the new community activated.
Described access unit 81 also for:
Before the specific cell initiating random access procedure for initiating Stochastic accessing, if determine, this specific cell is in unactivated state, then activate this specific cell.
Described access unit 81 for:
For FDD system, the subframe initiating random access procedure after subframe n+8 or subframe n+8; Or,
For TDD system, the sub-frame of uplink initiating random access procedure after sub-frame of uplink n+K or subframe n+K; Described n is subframe numbers when receiving described activation/deactivation signaling; The value of described K is determined according to system frame structure and hybrid automatic repeat-request HARQ two-way time RTT.
Described Stochastic accessing relevant parameter comprises:
Physical Random Access Channel PRACH configuration information and random access lead code preamble relevant information.
Described activation/deactivation signaling is: activation/deactivation medium education control unit MAC CE.
To sum up, beneficial effect of the present invention comprises:
In the scheme that the embodiment of the present invention provides, Stochastic accessing relevant parameter is carried in base station in the cell configuration signaling sent, and then sends activation/deactivation signaling, with indicating terminal according to described Stochastic accessing relevant parameter initiating random access procedure to terminal.Visible, in this programme, base station does not need, by PDCCH triggering terminal initiating random access procedure, effectively to reduce the expense of PDCCH.
In the scheme that the embodiment of the present invention provides, terminal receives the cell configuration signaling that base station sends, and carries Stochastic accessing relevant parameter in described cell configuration signaling; Receive the activation/deactivation signaling of the community for described cell configuration signal deployment that base station sends, according to described Stochastic accessing relevant parameter initiating random access procedure, to obtain the up TA of the community that described activation/deactivation signaling activates.Visible, in this programme, when terminal receives the activation/deactivation signaling of base station transmission, just can initiating random access procedure, to obtain the new Timing Advance activated on carrier wave, to receive after the PDCCH signaling that base station sends just compared with initiating random access procedure with terminal in prior art, the present invention effectively can shorten the time delay that terminal obtains uplink timing advance.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.