CN102348197B

CN102348197B - Method, system and device for triggering and launching random access

Info

Publication number: CN102348197B
Application number: CN201110297775.6A
Authority: CN
Inventors: 赵亚利
Original assignee: China Academy of Telecommunications Technology CATT
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2011-04-29
Filing date: 2011-09-30
Publication date: 2015-07-01
Anticipated expiration: 2031-09-30
Also published as: CN102300203A; CN102300203B; CN102348197A

Abstract

The embodiment of the invention discloses a method, system and device for triggering and launching a random access, relating to the field of wireless communication technology and used for reducing a signaling overhead of a PDCCH (Physical Downlink Control Channel). According to the method provided by the invention, a cell configuration signaling is sent to a terminal by a base station; relative random access parameters are carried by the cell configuration signaling; a cell activation/deactivation signaling which is configured aiming to the cell configuration signaling is sent to the terminal by the base station and is used for indicating the terminal to launch the random access according to the relative random access parameters. With the adoption of the method, system and device for triggering and launching the random access, provided by the invention, the signaling overhead of the PDCCH can be reduced.

Description

The triggering of Stochastic accessing and initiating method, system and device

Technical field

The present invention relates to wireless communication field, particularly relate to a kind of triggering and initiating method, system and device of Stochastic accessing.

Background technology

The peak rate of long-term evolution upgrading (LTE Advanced, LTE-A) system is greatly improved than Long Term Evolution (LTE) system, requires to reach descending 1Gbps, up 500Mbps.Meanwhile, lte-a system require and LTE system compatible well, LTE system maximum bandwidth 20MHz.Compatible and make full use of the needs of frequency resource based on improving peak rate, with LTE system, lte-a system introduces carrier aggregation (Carrier Aggregation, CA) technology.

Carrier aggregation technology refers to that terminal can be polymerized one or more community simultaneously, and these communities can work simultaneously, and the community number of terminal polymerization is configured by the business demand of base station according to terminal.Be that the little of a terminal configuration divides into main plot and auxiliary community two class, wherein:

Main plot (Primary Cell, PCell): when carrier aggregation, a general terminal only has a community as main plot, terminal is set up and is connected with the wireless heterogeneous networks (RRC) of base station on this community, and the transmission carrying all carrier wave ascending control informations of terminal is responsible in this community.

Auxiliary community (Secondary Cell, SCell): configured by base station, when carrier aggregation, auxiliary community is used for the business datum of transmission user mainly as resource.The auxiliary community acquiescence of base station configuration is in deactivation status, namely can not carry out uplink/downlink transfer of data, if will carry out uplink/downlink transfer of data, need first to activate these communities.

Under the scene of carrier aggregation, in order to terminal is better economized on electricity, introduce activation/deactivation mechanism.Activation/deactivation in lte-a system is carried out for single subdistrict, and embodiment has two kinds: explicit and implicit.It should be noted that implicit is only applicable to deactivating operation.

Display activation/deactivation mechanism, namely base station is by sending activation/deactivation medium education (MAC) control unit (CE), carrys out the state of activation of the community of control terminal polymerization.As shown in Figure 1, the length of MAC CE is 8 bits (bit) to the form of activation/deactivation MAC CE, the corresponding community of each bit, that is:

The corresponding PCell of rightmost side bit, because PCell is deactivated never, therefore this position is R bit, and acquiescence gets 0;

Other bit is corresponding SCell, i.e. a C respectively _ireference numeral is the SCell of i.Work as C _iwhen getting " 1 ", represent and activate this SCell, work as C _iwhen getting " 0 ", represent this SCell of deexcitation.

Implicit expression deexcitation mechanism, namely carries out the method for implicit expression deexcitation by introducing a packet data inactivity timer.Packet data inactivity timer based on cell maintenance, that is:

The packet data inactivity timer of this community is started when terminal receives the activation signaling activating this community;

At packet data inactivity timer run duration, once terminal can restart the packet data inactivity timer of this community after receiving the dispatch that the upstream or downstream for this community transmit.Carried by physical layer control channel (Physical Control Channel, PDCCH) for dispatch that is up or downlink data transmission;

Packet data inactivity timer time-out, then this community of terminal deexcitation.

The random access procedure of lte-a system is divided into competition Stochastic accessing and non-competing random access procedure, and both differences are whether base station is base station assigns special random access preamble code (preamble).The flow process of competition Stochastic accessing is as shown in Figure 2, specific as follows:

Message (Msg) 1: terminal (UE) selects Stochastic accessing preamble and Physical Random Access Channel (Physical Random Access Channel, PRACH) resource, and utilize this PRACH resource to the Stochastic accessing preamble selected by the transmission of base station;

Msg2: base station receives Stochastic accessing preamble, calculate uplink timing advance (TimeAlignment, TA), and send accidental access response (Random Access Response to UE, RAR) message, at least comprises this uplink timing advance information and the uplink scheduling information (UL grant) for Msg3 in accidental access response message.Accidental access response message is by DSCH Downlink Shared Channel (Downlink Sharedchannel, DL-SCH) transmission;

Msg3:UE first time sends scheduling of upstream transmissions message to base station, and this message carries the identification information of UE, and this message is by Uplink Shared Channel (Uplink Shared Channel, UL-SCH) transmission;

Msg4: base station sends contention resolved message to UE, and this message is transmitted by DL-SCH.The information that UE identifies and Msg4 receives that terminal sends according to Msg3, judges whether to compete successfully.

Lte-a system Multi-TA introduces

In order to ensure that the upstream data that the different districts that different UEs or same UE are polymerized is transmitted can arrive base station simultaneously, terminal needs to do some adjustment to the uplink moment, and this adjustment amount is TA.

In LTE version 10 (R10) and version before, a terminal uplink only has a carrier wave, therefore maintenance uplink timing advance is only needed, and for the version after R10, according to the carrier aggregation scene of 3GPP definition, the up-link carrier number of terminal polymerization may more than 1, therefore in order to ensure that the signal that different up-link carrier transmits can arrive base station simultaneously, may need to consider that different carrier uses different uplink timing advances, i.e. the situation of many TA (Multi-TA).If multiple communities of a terminal polymerization have cell portion to have identical TA, then the microzonation with identical TA can be divided into one group (group), this group is called a TA group, and in this case, Timing Advance can be safeguarded based on TA group.

Version after LTE-AR10 may need to consider that the scene of many TA is as follows:

The first, the up-link carrier of terminal polymerization belongs to different frequency bands (band);

The second, the node that the signal of the uplink of the community of terminal polymerization arrives base station approach is different, and such as some is through relaying, some without.

Realizing in process of the present invention, inventor finds to there is following technical problem in prior art:

For the terminal supporting carrier aggregation, base station can be the configuration of its dynamic conditioning and the variable number activated according to factors such as the traffic carrying capacitys of terminal, but under Multi-TA, after activating a carrier wave, if this carrier wave is in desynchronizing state, need first to allow this carrier wave carry out uplink synchronous, then transmitting uplink data could be carried out at this carrier wave, current solution is exactly send PDCCH order by base station to carry out triggering terminal initiation Stochastic accessing to obtain up TA, consider that carrier activation is than operating more frequently, therefore like this process makes the signaling consumption of PDCCH can be larger.

Summary of the invention

The embodiment of the present invention provides a kind of triggering and initiating method, system and device of Stochastic accessing, for reducing the signaling consumption of PDCCH.

Trigger a method for Stochastic accessing, the method comprises:

Base station sends cell configuration signaling to terminal, carries Stochastic accessing relevant parameter in described cell configuration signaling;

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.

Trigger a method for Stochastic accessing, the method comprises:

Terminal receives the cell configuration signaling that base station sends, and carries Stochastic accessing relevant parameter in described cell configuration signaling;

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 uplink timing advance TA of the community that described activation/deactivation signaling activates.

Trigger a device for Stochastic accessing, this device comprises:

Dispensing unit, for sending cell configuration signaling to terminal, carries Stochastic accessing relevant parameter in described cell configuration signaling;

Activate unit, 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.

Initiate a device for Stochastic accessing, this device comprises:

Receiving element, for receiving the cell configuration signaling that base station sends, carries Stochastic accessing relevant parameter in described cell configuration signaling;

Access unit, 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.

A kind of wireless communication system, this system comprises:

Base station, 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, 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.

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 in 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.

Accompanying drawing explanation

Fig. 1 is activation/deactivation MAC CE schematic diagram in prior art;

Fig. 2 competes random access procedure schematic diagram in prior art;

The method flow schematic diagram that Fig. 3 provides for the embodiment of the present invention;

The other method schematic flow sheet that Fig. 4 provides for the embodiment of the present invention;

Fig. 5 A is the MAC CE schematic diagram in the embodiment of the present invention;

Fig. 5 B is another MAC CE schematic diagram in the embodiment of the present invention;

The system configuration schematic diagram that Fig. 6 provides for the embodiment of the present invention;

The device structure schematic diagram that Fig. 7 provides for the embodiment of the present invention;

Another device structure schematic diagram that Fig. 8 provides for the embodiment of the present invention.

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 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:

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):

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.

Embodiment three (corresponding method 3):

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.

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:

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.

Claims

1. trigger a method for Stochastic accessing, it is characterized in that, the method comprises:

Base station sends the activation/deactivation signaling for the community of described cell configuration signal deployment to terminal, described activation/deactivation signaling is used to indicate described terminal determination base station activation or the new community activated, and according to described Stochastic accessing relevant parameter initiating random access procedure in described activation or the new community activated;

The 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/or 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 activate or newly activate uses and PRACH mask index;

Wherein, described Stochastic accessing relevant parameter comprises: Physical Random Access Channel PRACH configuration information and random access lead code preamble relevant information.

2. the method for claim 1, is characterized in that, carries the Stochastic accessing relevant parameter of all allocating cells in described cell configuration signaling; Or,

3. method as claimed in claim 2, it is characterized in that, 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, the activation cell indicated by described activation/deactivation signaling comprises the specific cell for initiating Stochastic accessing.

4., as the method as described in arbitrary in claim 1-3, it is characterized in that, described activation/deactivation signaling is: activation/deactivation medium education control unit MAC CE.

5. trigger a method for Stochastic accessing, it is characterized in that, the method comprises:

Terminal receives the activation/deactivation signaling of the community for described cell configuration signal deployment that base station sends, and described activation/deactivation signaling is used to indicate described terminal determination base station activation or the new community activated; According to described Stochastic accessing relevant parameter initiating random access procedure in described activation or the new community activated, to obtain the uplink timing advance TA of the community that described activation/deactivation signaling activates;

The described Stochastic accessing relevant parameter according to this community is at this community initiating random access procedure, comprise with the up TA obtaining this community: 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;

6. method as claimed in claim 5, is characterized in that, carry the Stochastic accessing relevant parameter of all allocating cells in described cell configuration signaling; Described according to described Stochastic accessing relevant parameter initiating random access procedure, comprise with the up TA obtaining the community that described activation/deactivation signaling activates:

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.

7. method as claimed in claim 5, is characterized in that, carry the Stochastic accessing relevant parameter of all allocating cells in described cell configuration signaling; Described according to described Stochastic accessing relevant parameter initiating random access procedure, comprise with the up TA obtaining the community that described activation/deactivation signaling activates:

Terminal 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, 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.

8. method as claimed in claim 7, it is characterized in that, the Stochastic accessing relevant parameter of the community that described basis is chosen, at the community initiating random access procedure that this is chosen, comprises with the up TA obtaining TA group belonging to this community chosen:

9. method as claimed in claim 7, is characterized in that, described terminal in this TA group, choose a base station activation or the new community activated comprises:

Terminal, according to the Stochastic accessing community selection rule preset, chooses a base station activation or the new community activated in this 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 this TA group.

10. method as claimed in claim 7, it is characterized in that, the method comprises further:

Terminal, for the community be respectively judged as YES, obtains 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.

11. methods as claimed in claim 5, is characterized in that, 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; Described according to described Stochastic accessing relevant parameter initiating random access procedure, comprise with the up TA obtaining the community that described activation/deactivation signaling activates:

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.

12. methods as claimed in claim 11, is characterized in that, the described Stochastic accessing relevant parameter according to this specific cell, at this specific cell initiating random access procedure, comprises with the up TA obtaining this specific cell:

13. methods as claimed in claim 11, is characterized in that, when determining to have established uplink synchronous for the specific cell of initiating Stochastic accessing in TA group, the method comprises further:

Terminal obtains 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.

14. methods as claimed in claim 11, it is characterized in that, before the specific cell initiating random access procedure for initiating Stochastic accessing, the method comprises further:

If terminal determines that this specific cell is in unactivated state, then activate this specific cell.

15., as the method as described in arbitrary in claim 5-14, is characterized in that, for FDD system, and the subframe initiating random access procedure of terminal after subframe n+8 or subframe n+8; Or,

For 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 according to system frame structure and hybrid automatic repeat-request HARQ two-way time RTT.

16. as the method as described in arbitrary in claim 5-14, and it is characterized in that, described activation/deactivation signaling is: activation/deactivation medium education control unit MAC CE.

17. 1 kinds of devices triggering Stochastic accessing, it is characterized in that, this device comprises:

Activate unit, for sending the activation/deactivation signaling for the community of described cell configuration signal deployment to terminal, described activation/deactivation signaling is used to indicate described terminal determination base station activation or the new community activated, and according to described Stochastic accessing relevant parameter initiating random access procedure in described activation or the new community activated;

18. devices as claimed in claim 17, is characterized in that, carry the Stochastic accessing relevant parameter of all allocating cells in described cell configuration signaling; Or,

19. devices as claimed in claim 18, it is characterized in that, described activation unit is used 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, the activation cell indicated by described activation/deactivation signaling comprises the specific cell for initiating Stochastic accessing.

20. as the device as described in arbitrary in claim 17-19, and it is characterized in that, described activation/deactivation signaling is: activation/deactivation medium education control unit MAC CE.

21. 1 kinds of devices of initiating Stochastic accessing, it is characterized in that, this device comprises:

Access unit, for receiving the activation/deactivation signaling of the community for described cell configuration signal deployment that base station sends, described activation/deactivation signaling is used to indicate terminal determination base station activation or the new community activated; According to described Stochastic accessing relevant parameter initiating random access procedure in described activation or the new community activated, to obtain the uplink timing advance TA of the community that described activation/deactivation signaling activates;

Described access unit is used 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;

22. devices as claimed in claim 21, it is characterized in that, described access unit is used for:

23. devices as claimed in claim 21, it is characterized in that, described access unit is used for:

24. devices as claimed in claim 23, it is characterized in that, described access unit is used for:

25. devices as claimed in claim 23, it is characterized in that, described access unit is used for:

26. devices as claimed in claim 23, is characterized in that, described access unit also for:

27. devices as claimed in claim 21, is characterized in that, described access unit also for:

28. devices as claimed in claim 27, it is characterized in that, described access unit is used for:

29. devices as claimed in claim 27, is characterized in that, described access unit also for:

30. devices as claimed in claim 27, is characterized in that, described access unit also for:

31. as the device as described in arbitrary in claim 21-30, and it is characterized in that, described access unit is used for:

32. as the device as described in arbitrary in claim 21-30, and it is characterized in that, described activation/deactivation signaling is: activation/deactivation medium education control unit MAC CE.

33. 1 kinds of wireless communication systems, is characterized in that, this system comprises:

Base station, 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 to terminal, described activation/deactivation signaling is used to indicate described terminal determination base station activation or the new community activated, and according to described Stochastic accessing relevant parameter initiating random access procedure in described activation or the new community activated; The 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/or 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 activate or newly activate uses and PRACH maskindex;

Terminal, 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 in described activation or the new community activated, to obtain the uplink timing advance TA of the community that described activation/deactivation signaling activates; The described Stochastic accessing relevant parameter according to this community is at this community initiating random access procedure, comprise with the up TA obtaining this community: 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;