Embodiment
Random access procedure, for setting up the uplink synchronous of UE and base station, by the sub-frame of uplink for random access configuring in system, uses PRACH transmission preamble sequence, and the accidental access response that receives base station feedback is realized uplink synchronous.
In prior art, for the UE that supports carrier aggregation, a PCell and at least one SCell can be distributed to it in base station, and in current LTE-A Rel-10 system, the random access of CA UE occurs over just on PCell; But in LTE-A Rel-11 system, in order to support the carrier aggregation of up different frequency range, and the carrier aggregation deployment way of macro base station (Macro eNB) and RRH mixing, PCell cause propagation time different situations different from SCell signal path will be there will be, be the uplink synchronous that SCell needs independent foundation maintenance and base station, therefore need on SCell, carry out random access and adjust to realize TA.
Further, due to the PDCCH blind check limited ability of current C A UE, cannot on SCell, in public search space, monitor the required PDCCH with RA-RNTI of random access procedure, and the random access procedure on SCell is triggered by network side, the synchronization delayed time minimum that non-competing random access procedure is introduced, and at RACH(Random Access Channel, Random Access Channel) in the situation of resource abundance, network side only can trigger non-competitive random access, therefore, the embodiment of the present invention provides the method and apparatus of non-competing random access on a kind of auxiliary community, in non-competing random access procedure, do not need UE on SCell, to monitor public search space PDCCH.
Below in conjunction with the accompanying drawing in the present invention, the technical scheme in the present invention is clearly and completely described, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment mono-
The embodiment of the present invention one provides the method for non-competing random access on a kind of auxiliary community, and as shown in Figure 3, the method comprises the following steps:
Step 301, network side (as eNB) notice is initiated non-competing random access on UEFu community.For example, eNB is by PDCCH order(order) or the message informing UE such as RRC initiate non-competing random access procedure at SCell.
Step 302, UE receives from the notice of initiating non-competing random access on network side Fu community.
Step 303, initiates non-competing random access on UEFu community, Bing Fu sends dedicated preamble on community.
Step 304, network side receives the dedicated preamble from UE.Wherein, in the time receiving dedicated preamble in PRACH resource corresponding to network side Fu community, identifying dedicated preamble by dedicated preamble is that this UE sends.
Step 305, network side sends the schedule information of carrying TA value information by the dedicated search space of UE to UE.
Step 306, UE monitors the schedule information of carrying TA value information in the dedicated search space of self.
For the processing procedure of step 305 and step 306, can be divided into following processing mode:
Mode one:
Network side sends the schedule information of carrying TA value information by the dedicated search space of UE to UE, comprise: in dedicated search space corresponding to scheduling carrier wave Yu Fu community corresponding to network side Fu community, the PDCCH(that sends the RA-RNTI scrambling corresponding with dedicated preamble transfer resource to UE is not in order to increase blind check, and the PDCCH that can be limited to the RA-RNTI scrambling of UE search volume transmission adopts DCI (Downlink Control Information) format(form) 1A).UE monitors the schedule information of carrying TA value information in the dedicated search space of self, comprise: in dedicated search space corresponding to scheduling carrier wave Yu Fu community corresponding to UEFu community, monitor the PDCCH of RA-RNTI scrambling, wherein RA-RNTI is that the PRACH resource using according to transmission preamble obtains.
In the embodiment of the present invention, the downlink resource that network side distributes by the PDSCH that on the PDCCH notice UEFu community of RA-RNTI scrambling, transmission bearer accidental access response message uses.On the resource Fu community of indicating in the PDCCH of UE by RA-RNTI scrambling, receive PDSCH channel data, and resolve and process according to the form of accidental access response message.
Concrete, in scheduling carrier wave corresponding to eNBKe Fu community (sending the SCell of preamble) the dedicated search space corresponding with this SCell, notify UE on SCell, to transmit the downlink resource that corresponding Msg2 PDSCH distributes by the mode of PDCCH masked with RA-RNTI; Corresponding, UE can be on scheduling carrier wave corresponding to this SCell dedicated search space corresponding with this SCell, monitors PDCCH masked with RA-RNTI, and on corresponding SCell, receives and process corresponding Msg2 message according to the information of wherein instruction.
Further, if UE is at RAR window(window) in the PDCCH of RA-RNTI scrambling do not detected or dedicated preamble message in corresponding accidental access response message, do not detected, on ZeUEFu community, carry out dedicated preamble retransmission process; Afterwards, if when dedicated preamble transmission reaches maximum times, random access procedure is not success still, UE can stop random access procedure, and/or send random access procedure failure (as RRC message or MAC(Media Access Control, medium access control) message to network side).
Mode two: network side sends the schedule information of carrying TA value information by the dedicated search space of UE to UE, comprising: network side carries the TA value information in the TA Group under auxiliary community in the downlink dedicated data that send to UE.UE monitors the schedule information of carrying TA value information in the dedicated search space of self, comprising: UE always obtains the TA value information in the TA Group under auxiliary community in the downlink dedicated data of automatic network side.
In the embodiment of the present invention, TA value information is the TA value information of 11bit, and the expression way of the TA value information of 11bit is the TAC(Timing Alignment command that comprises 11bit, Timing Advance order) MAC (medium access control) CE(Control Element, control unit) information, and LCID distinguishes by reservation logic channel logo, and/or by radio resource control RRC signal deployment.
Concrete, eNB can carry the initial time lead value in the TA Group under this SCell, i.e. the TA value information of 11bit in descending UE dedicated data transmission.Afterwards, UE is at private downlink DL-SCH(DSCH Downlink Shared Channel) obtain and carry accordingly the information of 11 bit TA values in transfer of data, and be used in follow-up user uplink data transmitting procedure as absolute up Timing Advance; And receive after the TAC MAC CE of 11bit as UE, using this TA value as absolute lead for adjusting the up transmitting time point of this TA Group, and/or restart the TATimer of the TA Group under auxiliary community.
Further, if UE does not receive the TA value information in the TA Group under auxiliary community in specified window, on ZeUEFu community, carry out dedicated preamble retransmission process; Afterwards, if dedicated preamble transmission reaches the still not success of maximum times random access procedure, UE stops random access procedure, and/or sends random access procedure failure to network side.
In sum, in the embodiment of the present invention, at network side, after triggering UE initiates non-competing random access on SCell, when receiving the dedicated preamble of distribution in the PRACH resource of the SCell that network side is distributing, network side identifies this UE according to this information, carries out afterwards the scheduling of the downstream feedback transmission to this preamble information in the dedicated search space of this UE; In UE side, when receiving after UE the UE PRACH resource and special Preamble information transmitted on SCell that network side distributes, UE carries out preamble transmission on corresponding SCell, in the dedicated search space of UE, monitor afterwards the schedule information of corresponding Msg2 message, obtain Timing Advance information.
By technique scheme, can realize UE and on SCell, initiate non-competing random access procedure, and UE can, without monitoring under the prerequisite of SCell public search space PDCCH, complete this random access procedure, and obtain the TA information on SCell.
Embodiment bis-
The embodiment of the present invention two provides the method for non-competing random access on a kind of auxiliary community, and as shown in Figure 4, the method comprises the following steps:
Step 401, eNB initiates non-competing random access procedure by message informing UE such as PDCCH order or RRC at SCell.
Step 402, UE sends dedicated preamble on SCell.Select the same with the mode on PCell in current agreement with the mode that sends dedicated preamble.
Step 403, eNB identifies this UE by dedicated preamble, and in the UE dedicated search space corresponding with this SCell, sends the PDCCH that transmits corresponding RA-RNTI scrambling with preamble in the corresponding scheduling carrier wave of this SCell.
Step 404 if UE monitors the PDCCH of corresponding RA-RNTI scrambling, according to the resource of indicating in PDCCH, receives PDSCH information on SCell, and sets it as the decoding data processing of Msg2 DL-SCH transmission.
In the embodiment of the present invention, if wherein carry the preamble information identical with this UE, thinking random accesses successfully, the TA information of carrying apply RAR message in the SCell TAGroup of SCell and correspondence in, start or restart TATimer, and on this SCell, send follow-up uplink UE exclusive data according to the UL Grant in RAR MAC CE, wherein timing relationship is with the existing timing relationship of current agreement.
If wherein do not comprise the preamble information of this UE, UE continues to monitor PDCCH or the corresponding PDSCH transfer of data of follow-up RA-RNTI scrambling; If be that UE monitors the time window of Msg2 at RAR window() in UE the PDCCH of corresponding RA-RNTI scrambling do not detected, or UE do not detect special Preamble message, UE carries out preamble retransmission process on this SCell; If Preamble transmission reaches maximum times random access procedure and still do not become, UE stops random access procedure this time, and sends a notification message to eNB, notifies its random access procedure failure.
Embodiment tri-
The embodiment of the present invention three provides the method for non-competing random access on a kind of auxiliary community, and as shown in Figure 5, the method comprises the following steps:
Step 501, eNB initiates non-competing random access procedure by message informing UE such as PDCCH order or RRC at SCell.
Step 502, UE sends dedicated preamble on SCell.Select the same with the mode on PCell in current agreement with the mode that sends dedicated preamble.
Step 503, eNB identifies this UE by dedicated preamble, and in the downlink dedicated data to UE, comprises the initial TA value information of UE (as the downlink data of 11 bits) in subsequent transmission.Wherein, the TA information that can carry 11bit by introducing new MAC CE.
Step 504, UE is receiving after this TA information, applies this effective TA value under this SCell in TA Group, and starts or restart TATimer.
In the embodiment of the present invention, if in specified window, (this specified window can be existing RAR window to UE, also can be newly to define window), do not receive effective 11bit TA information of the affiliated TAGroup of this SCell, think this random access failure, on SCell, retransmit Preamble, again initiate RA process; Reach maximum times if preamble sends, random access procedure is still failed, by RRC or MAC message informing eNB, notifies its random access procedure failure.
Embodiment tetra-
The embodiment of the present invention four provides the method for non-competing random access on a kind of auxiliary community, be assumed to be UE and configured 1 PCell and 1 SCell, the transfer of data on SCell is to dispatch by the PDCCH on PCell, and accesses successfully at random, as shown in Figure 6, the method comprises the following steps:
Step 601, eNB sends PDCCH order on PCell, and notice UE initiates non-competing random access on SCell.
Step 602, UE sends dedicated preamble on SCell.
Step 603, eNB receives dedicated preamble on SCell, and identifies this UE.
Step 604, in the eNB dedicated search space that this SCell is corresponding on the PCell of this UE, sends to UE by the PDCCH of RA-RNTI scrambling, and corresponding Msg2 DL-SCH data are transmitted in the corresponding position of SCell simultaneously simultaneously.
Step 605, UE is according to the resource of the PDCCH instruction of the RA-RNTI scrambling on PCell, carries out DL-SCH data processing (as comprise physical layer data demodulating and decoding, and the MAC PDU of MAC layer resolves) at SCell correspondence position.
Further, if determine the preamble information that comprises this UE transmission in the RAR message of carrying, think random and access successfully, and apply the TA value of this RAR message, restart TATimer simultaneously; Wherein, the transmission of this RAR message is identical with the mode specifying in current agreement, does not have HARQ to retransmit, and the information that multiple preamble are corresponding may be incorporated in a piece of news to be transmitted.
Step 606, UE, according to UL Grant information corresponding in RAR message, initiates UE dedicated uplink transfer of data on SCell.
In the embodiment of the present invention, if the scheduling carrier wave of the SCell of random access is SCell-1, RA-RNTI masked PDCCH transmits on SCell-1, and UE only need monitor this PDCCH in SCell-1 with in dedicated search space corresponding to RA SCell.
Embodiment five
The embodiment of the present invention five provides the method for non-competing random access on a kind of auxiliary community, be assumed to be UE and configured 1 PCell and 1 SCell, the transfer of data on SCell is to dispatch by the PDCCH on PCell, successful after random access retransmits, as shown in Figure 7, the method comprises the following steps:
Step 701, eNB sends PDCCH order on PCell, and notice UE initiates non-competing random access on SCell.
Step 702, UE sends dedicated preamble on SCell.
Step 703, UE monitors on PCell and PDCCH corresponding to this SCell in RAR window, RA-RNTI information do not detected.
Step 704, UE carries out Preamble re-transmission on SCell.
Step 705, eNB receives dedicated preamble on SCell, and identifies this UE.
Step 706, in the eNB dedicated search space that this SCell is corresponding on the PCell of this UE, sends to UE by the PDCCH of RA-RNTI scrambling, and corresponding Msg2 DL-SCH data are transmitted in the corresponding position of SCell simultaneously simultaneously.
Step 707, UE, according to the resource of the PDCCH instruction of the RA-RNTI scrambling on PCell, carries out DL-SCH data processing at SCell correspondence position.
In the embodiment of the present invention, if determine the preamble information that comprises UE transmission in the RAR message of carrying, think random and access successfully, and apply the TA value of this RAR message, restart TATimer simultaneously.
Step 708, UE, according to UL Grant information corresponding in RAR message, initiates UE dedicated uplink transfer of data on SCell.
In the embodiment of the present invention, be SCell-1 if access at random the scheduling carrier wave of SCell, RA-RNTI masked PDCCH transmits on SCell-1, in the dedicated search space that UE only need monitor in SCell-1 and RA SCell is corresponding, monitors this PDCCH.
Embodiment six
The embodiment of the present invention six provides the method for non-competing random access on a kind of auxiliary community, be assumed to be UE and configured 1 PCell and 1 SCell, the transfer of data on SCell is to dispatch by the PDCCH on PCell, accesses successfully at random, as shown in Figure 8, the method comprises the following steps:
Step 801, eNB sends PDCCH order on PCell, and notice UE initiates non-competing random access on SCell.
Step 802, UE sends dedicated preamble on SCell.
Step 803, eNB receives dedicated preamble on SCell, and identifies this UE.
Step 804, UE obtains the SCell TA information of 11bit in the data of the UE private downlink transmission of eNB scheduling, think random and access successfully, and it is upper that the TA information of this 11bit is directly applied in to SCell, starts TATimer.
Embodiment seven
The embodiment of the present invention seven provides the method for non-competing random access on a kind of auxiliary community, be assumed to be UE and configured 1 PCell and 1 SCell, the transfer of data on SCell is to dispatch by the PDCCH on PCell, random access failure, as shown in Figure 9, the method comprises the following steps:
Step 901, eNB sends PDCCH order on PCell, and notice UE initiates non-competing random access on SCell.
Step 902, UE sends dedicated preamble on SCell.
Step 903, UE does not find the 11bit TA command(order under this SCell in window).Wherein, this window can be RAR window, can be also the window of the new configuration of RRC.
Step 904, UE carries out Preamble re-transmission on SCell.
Step 905, UE does not find the 11bit TA command under this SCell in window.
Step 906, Preamble transmission reaches maximum number of times of transmission, and UE determines random access procedure failure.
Step 907, UE is by RRC or the relevant random access failure(failure of MAC message informing eNB) situation; Follow-up eNB behavior can be to delete the up-link carrier of this SCell etc.
Embodiment eight
The present embodiment is elaborated to the SCell TA value information of 11bit, and the SCell TA value information of this 11bit can comprise various ways, for example:
(1) the MAC CE of the TAC MAC CE information of introducing 11bit.In MAC subheader, use current reserved(to reserve) LCID(Logical Channel ID, Logic Channel Identifier) for identifying long TAC MAC CE, concrete MAC CE form as shown in figure 10, wherein TAG is the SCell that current SCell(sends preamble) under the index numbering of TAGroup, can be 2 bits, also can use 2 R bits above, TAG territory size can be 1-4bit, is reservation bit if any residue.
(2) introduce new TAC MAC CE, the TA information that can carry 6bit and 11bit simultaneously.Can in MAC subheader, use current reserved LCID for identifying new TAC MAC CE, it is new or original also can not introducing new LCID but configure TAC MAC CE by the demonstration of RRC signaling.As shown in figure 11, wherein T bit is used to indicate the TA MAC CE of 6bit or 11bit to concrete MAC CE form; TAG is the index numbering of TAGroup under current SCell, can be 2 bits, also can use R bit and TAG bit simultaneously.
In the embodiment of the present invention, if T=1 is the TA MAC CE of 11 bits, form as shown in figure 12.If T=0 is the TA MAC CE of 6 bits, form as shown in figure 13.
At above-mentioned Figure 10 in Figure 13, the change in location of TAG, R, T bit, the bit length of TAG also can increase according to the actual requirements or shorten.
(3) if TAC MAC CE be all TA Group together, above two kinds of modes all can be used as the expression way of the TA information of each TAG in TAC MAC CE, for example:
Expression way as shown in figure 14, because this message-length is variable, adopts the variable MAC subheader that contains L territory, and introduces new LCID for identifying this new MAC CE form.Wherein first byte TAG Bitmap is for identifying the TA information that this MAC CE comprises several TAGroup, wherein be designated as 1 the TA specifying information that increases in the back this TAG, the TA specifying information form of each TAG adopts the 2nd kind of expression way, be the TA information that T=1 identifies 11 bits, T=0 is designated the TA information of 6 bits.
Expression way as shown in figure 15, because this message-length is variable, adopts the variable MAC subheader that contains L territory, and introduces new LCID for identifying this new MAC CE form.Wherein first byte TAG Bitmap is for identifying the TA information that this MAC CE comprises several TAGroup, wherein be designated as 1 the TA specifying information that increases in the back this TAG, the TA specifying information form of each TAG adopts the 1st kind of expression way, be the TA information that T=1 identifies 11 bits, the i.e. form of two bytes, T=0 is designated the TA information of 6 bits, the i.e. form of a byte.
In Figure 13, wherein the field of invalid can be regarded R bit, and reserve field is used.
In Figure 14, TA Command is 11bit or 6bit length specifically, judges according to T bit value.
Embodiment nine
In the embodiment of the present invention, for actual situation, network side can send by the search volume of UEFei Fu community public search space the schedule information of carrying TA value information to UE, and UE monitors the schedule information of carrying TA value information in the search volume of self Fei Fu community public search space.It should be noted that the search volume of Gai Feifu community public search space at least comprises the public search space of the dedicated search space of UE and the main plot of UE; The technical scheme that above-described embodiment one to embodiment eight is for the dedicated search space of UE, the public search space for the main plot of UE in the present embodiment is described in detail.
The embodiment of the present invention nine provides the method for non-competing random access on a kind of auxiliary community, comprising:
Step 1, network side (as eNB) notice are initiated non-competing random access on UEFu community.For example, eNB is by PDCCH order(order) or the message informing UE such as RRC initiate non-competing random access procedure at SCell.
Step 2, UE receive from the notice of initiating non-competing random access on network side Fu community.
On step 3, UEFu community, initiate non-competing random access, Bing Fu sends dedicated preamble on community.
Step 4, network side receive the dedicated preamble from UE.Wherein, in the time receiving dedicated preamble in PRACH resource corresponding to network side UEFu community, identifying dedicated preamble by dedicated preamble is that this UE sends.
Step 5, network side send the schedule information of carrying TA value information by the public search space of the main plot of UE to UE.
Step 6, UE monitor the schedule information of carrying TA value information in the public search space of the main plot of self.
For the processing procedure of step 5 and step 6, can specifically be handled as follows:
Network side sends the schedule information of carrying TA value information by the public search space of the main plot of UE to UE, comprising: network side transmits PDCCH on the public search space of the main plot of UE, and transmit corresponding accidental access response message on the main plot of UE.Further, network side transmits corresponding accidental access response message on the main plot of UE, comprise: the accidental access response of identical RA-RNTI's and accidental access response the corresponding identical subframe of transmission of correspondence that network side need to send on same community is packaged in the MAC PDU(protocol Data Unit of an accidental access response message) in, and on the main plot of UE the accidental access response message after transmission packing.
UE monitors the schedule information of carrying TA value information in the public search space of the main plot of self, comprising: the preamble that UE detects auxiliary community by the public search space of main plot transmits corresponding accidental access response message and TA value information.Further, UE is according to the PRACH Resource Calculation RA-RNTI that sends preamble use, in the public search space of main plot, monitor the PDCCH that RA-RNTI is corresponding, and the downlink resource on the resource Wei Zhe community of PDCCH instruction, and resolve and process according to the form that strengthens accidental access response message.
Further, in the time carrying the cell number of preamble transmission community in the MAC of accidental access response message PDU, UE judges whether random access procedure success according to this cell number and preamble ID.Wherein, in the MAC PDU of accidental access response message, carry preamble and send the cell number of community and be: access at random cell number, system-level numbering or UE rank numbering, and configure to UE's for or broadcast special by RRC.
In the embodiment of the present invention, in the MAC PDU of accidental access response message, carry the cell number of preamble transmission community, comprise: in increasing random access cell number or utilize current format in the form of each accidental access response message, all or part of field of Temporary C-RNTI is for identifying random access cell number, or, increase random access cell number in the MAC head part of the whole MAC PDU of accidental access response message; Wherein, new and old form identifies by the reserved field in MAC PDU or in RAR.In addition,, if do not receive the accidental access response of RA-RNTI and preamble ID and cell number coupling in accidental access response window, preamble retransmission process is carried out in UEFu community; The accidental access response window that UE uses adopts the configuration value of main plot, or the configuration value of the affiliated auxiliary community of preamble transmission, or requires the parameter value of He Fu community, main plot to equate.Afterwards, still there is no success if dedicated preamble transmission reaches maximum times random access procedure, UE stops random access procedure, and/or failed to network side notice random access procedure by RRC or MAC message.
In the embodiment of the present invention, the behavior of eNB comprises: eNB receives after the dedicated preamble of UE on the SCell of UE, can confirm UE according to preamble, and corresponding accidental access response message is placed on to the upper transmission of PCell of UE, wherein PDCCH is in the transmission of the PCell of UE public search space, and corresponding PDSCH transfer of data (being accidental access response message) is transmitted on PCell.
It should be noted that eNB can be packaged in the accidental access response that need to send on same Cell in the MAC PDU of an accidental access response message, the preamble that the accidental access response wherein comprising can corresponding different districts.For example, as shown in figure 16, eNB respectively on Cell-1,2,3 identical PRACH position receive preamble, (be that RA-RNTI is identical, and transmit at same time point), corresponding Msg2 transmission location is all Cell-1; Now UE is packaged in the RAR message of these UE together and transmits as a RAR MAC PDU on Cell-1, and the PDCCH of employing is this RA-RNTI.
Further, in the MAC PDU carrying in the RAR MAC PDU of packing, in the form of RAR, increase the instruction to cell under concrete preamble ID, corresponding mode includes but not limited to: (1) adopts the expression way that adds RA Cell index in current RAR form, for example,, by interim current Temporary() C-RNTI field is multiplexed with RA Cell Index; (2) in UL Grant or RAR, new field illustrates concrete RA Cell information.Wherein, the cell index information comprising is by RRC signal deployment, and is UE rank or cell level.
In the embodiment of the present invention, when the RAR message of UE is packaged in together, packing manner comprises:
(1) RAR length does not change, and such RAR packing, together with can being packaged in the RAR of R8/9; But form is distinguished by the R field in RAR and is distinguished, and when R=1, resolves according to mode shown in Figure 17, and R=0 resolves according to existing mode.Under which, UE is basic identical to the resolving of whole RAR MAC PDU, find the position of corresponding RAR according to the RAPID of MAC head part in MAC PDU, and whether be new RAR form according to the R bit decision in RAR wherein, if new RAR form, determines whether that according to cell number wherein oneself sends preamble affiliated subdistrict; If it is own affiliated that coupling illustrates this RAR, otherwise continues to search the RAPID of follow-up coupling in this MAC PDU and follow-up cell number, carry out RAR coupling according to cell number and RAPID.
(2) RAR length changes, and for ensureing and the compatibility of the UE of R8, such extended RAR is packaged in together separately, and the common RAR of R8/9 packs and makes a distinction.As shown in figure 18, differentiation can be distinguished by R bit in the head of the BI in MAC HEADER.If extended RAR MAC is PDU, this MAC PDU header part can comprise BI information, and carries out the differentiation of RAR MAC PDU type according to the R bit in BI information.UE, in the time reading this MAC PDU, if do not find BI field in MAC PDU Header part, resolves according to existing RAR MAC PDU form; If find BI field (being set to 0) in MAC PDU Header part, the indication bit that is wherein used to indicate new and old MAC PDU is not designated as format, resolves according to existing RAR MAC PDU form; If otherwise find BI field in MAC PDU Header part, the indication bit that is wherein used to indicate new and old MAC PDU is designated as format (being set to 1), resolve according to new RAR MAC PDU form, wherein the content of each RAR part is resolved according to the new RAR form in Figure 18, and carries out the judgement of RAR according to RAPID and cell number.For R8 UE, there is illegal reserved field value if find in the BI field in RAR MAC PDU, abandon this RAR MAC PDU and do not resolve;
(3) current RAR form and new RAR form are packaged in same MAC PDU.Be that UE is in the time receiving this MAC PDU, can resolve according to the R bit in each RAR in MAC PDU, and carry out the new and old differentiation of RAR form according to R bit, thus judgement is to carry out RAR coupling according to RAPID, or mate according to RAPID and cell number;
(4) current RAR form and new RAR form are packaged in same MAC PDU, wherein the content of existing RAR form are all placed on to the foremost of MAC PDU, newly putting behind of RAR form.Be that UE is in the time receiving this MAC PDU, can resolve according to the R bit in each RAR in MAC PDU, and carry out the new and old differentiation of RAR form according to R bit, thus judgement is to carry out RAR coupling according to RAPID, or mate according to RAPID and cell number; For R8 UE, when being resolved to, in RAR, to have R bit be unreserved value, abandons this MAC PDU.
In the embodiment of the present invention, the behavior of UE side comprises: UE sends after preamble on SCell, the RA-RNTI drawing according to corresponding PRACH Resource Calculation, in the public search space of PCell, monitor the PDCCH that this RA-RNTI is corresponding, and the resource of this PDCCH instruction is the downlink resource on this cell; Further, UE receives the RAR MAC PDU of this community according to PDCCH, and resolves according to the form of RAR MAC PDU; Resolving for RAR variation and indeclinable two kinds of modes is as follows respectively:
(1) if RAR length does not change, consistent with current RAR length: UE mates according to the cell index information in the RAR field of the RAPID information in the subheader in RAR MAC PDU and correspondence, illustrates and accesses successfully at random if the match is successful.
(2) if RAR length variations, extended RAR is separately in the situation of packing: whether UE distinguishes this MAC PDU according to the specific fields of RAR MAC PDU and adopt extended RAR to resolve, if this RAR MAC PDU is not resolved; In the time resolving, each RAR all adopts extended RAR to resolve, and mates according to the cell index in RAPID and concrete RAR.
In addition, when UE receives RAR corresponding to SCell on PCell, corresponding RAR window can adopt the RAR configuration of PCell, also can adopt the RAR window configuration of SCell, or to require both configurations be must be identical.
Embodiment ten
Based on the inventive concept same with said method, a kind of network equipment is also provided in the embodiment of the present invention, as shown in figure 19, this network equipment comprises:
The first sending module 11, for initiating non-competing random access on notifying user equipment Fu community;
Receiver module 12, for receiving the Special leader preamble from described subscriber equipment;
The second sending module 13, sends the schedule information of carrying timing advance TA value information for the search volume by described subscriber equipment Fei Fu community public search space to described subscriber equipment.
Described receiver module 12, specifically for when receive described dedicated preamble in Physical Random Access Channel PRACH resource corresponding to described auxiliary community time, identifying described dedicated preamble by described dedicated preamble is that described subscriber equipment sends.
Described the second sending module, sends the schedule information of carrying TA value information to described subscriber equipment specifically for the dedicated search space by described subscriber equipment; Or the public search space of the main plot by described subscriber equipment sends the schedule information of carrying TA value information to described subscriber equipment.
Described the second sending module 13, in the dedicated search space corresponding with described auxiliary community at scheduling carrier wave corresponding to described auxiliary community, send the physical downlink control channel PDCCH of the random Radio Network Temporary Identifier RA-RNTI scrambling corresponding with described dedicated preamble transfer resource to described subscriber equipment; The PDCCH of RA-RNTI scrambling adopts descending control information format DCI format 1A.
Described the second sending module 13, is further used for notifying the described subscriber equipment downlink resource that the Physical Downlink Shared Channel PDSCH that transmission bearer accidental access response message uses on described auxiliary community distributes by the PDCCH of described RA-RNTI scrambling.
Described the second sending module 13, specifically for carrying the TA value information in the TA Group under described auxiliary community in the downlink dedicated data that send to described subscriber equipment.
The TA value information that described TA value information is 11bit, and the expression way of the TA value information of described 11bit is the Timing Advance order medium access control unit TAC MAC CE information that comprises 11bit, and LCID distinguishes by reservation logic channel logo, and/or by radio resource control RRC signal deployment.
Described the second sending module 13, transmits PDCCH on the public search space specifically for the main plot at described subscriber equipment, transmits corresponding accidental access response message on the main plot of described subscriber equipment.Described the second sending module 13, the accidental access response that is further used for identical RA-RNTI's and accidental access response the corresponding identical subframe of transmission of the correspondence that need to send on same community is packaged in the MAC protocol Data Unit PDU of an accidental access response message, and on the main plot of described subscriber equipment, transmits the accidental access response message after described packing.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into multiple submodules.
Embodiment 11
Based on the inventive concept same with said method, a kind of subscriber equipment is also provided in the embodiment of the present invention, as shown in figure 20, this subscriber equipment comprises:
Receiver module 21, for receiving from the notice of initiating non-competing random access on network side Fu community;
Sending module 22 for initiate non-competing random access on described auxiliary community, and sends dedicated preamble on described auxiliary community;
Processing module 23, for monitoring the schedule information of carrying TA value information in the search volume of Fei Fu community public search space.
Described processing module 23, specifically for monitoring the schedule information of carrying TA value information in the dedicated search space of self; Or, in the public search space of main plot of self, monitor the schedule information of carrying TA value information.
Described processing module 23, in the dedicated search space corresponding with described auxiliary community at scheduling carrier wave corresponding to described auxiliary community, monitors the PDCCH of RA-RNTI scrambling.Wherein, RA-RNTI is that the PRACH resource using according to transmission preamble obtains; The PDCCH of described RA-RNTI scrambling adopts DCI format 1A.
Described processing module 23, the resource that is further used for indicating in the PDCCH by described RA-RNTI scrambling receives PDSCH channel data on described auxiliary community, and resolves and process according to the form of accidental access response message.
Described processing module 23, if also, for the PDCCH of described RA-RNTI scrambling not detected at accidental access response RAR window or dedicated preamble message not detected in corresponding accidental access response message, carry out dedicated preamble retransmission process on described auxiliary community; If dedicated preamble transmission reaches the still not success of maximum times random access procedure, stop random access procedure, and/or notify random access procedure failure by RRC or MAC message to network side.
Described processing module 23, specifically for obtaining the TA value information in the TA Group under described auxiliary community from the downlink dedicated data from described network side.
The TA value information that described TA value information is 11bit, and the expression way of the TA value information of described 11bit is the Timing Advance order medium access control unit TAC MAC CE information that comprises 11bit, and LCID distinguishes by reservation logic channel logo, and/or by radio resource control RRC signal deployment; When receiving after the TAC MAC CE of 11bit, this TA value is used for adjusting the up transmitting time point of this TA Group as absolute lead, and/or restarts the TATimer of the TA Group under described auxiliary community.
Described processing module 23, if also for do not receive the TA value information in the TA Group under described auxiliary community in specified window, carry out dedicated preamble retransmission process on described auxiliary community; If dedicated preamble transmission reaches the still not success of maximum times random access procedure, stop random access procedure, and/or send random access procedure failure to network side.
Described processing module 23, transmits corresponding accidental access response message and TA value information specifically for the preamble that detects auxiliary community by the public search space of described main plot.
Described processing module 23, be further used for the PRACH Resource Calculation RA-RNTI using according to sending preamble, and in the public search space of described main plot, monitor the PDCCH that described RA-RNTI is corresponding, and the downlink resource on the resource Wei Zhe community of described PDCCH instruction, and resolve and process according to the form that strengthens accidental access response message.
Described processing module 23, specifically in the time carrying the cell number of preamble transmission community in the MAC of accidental access response message PDU, judges whether random access procedure success according to this cell number and preamble ID; Wherein, the cell number of carrying preamble transmission community in the MAC PDU of accidental access response message is: access at random cell number, and system-level numbering or UE rank numbering, and for special by RRC or broadcast configuration;
In increasing random access cell number or utilize current format in the form of each accidental access response message, all or part of field of Temporary C-RNTI is for identifying random access cell number, or, increase random access cell number in the MAC head part of the whole MAC PDU of accidental access response message; Wherein, form identifies by the reserved field in MAC PDU or in RAR.
Described processing module 23, if specifically for do not receive the accidental access response of RA-RNTI and preamble ID and cell number coupling in accidental access response window, carry out preamble retransmission process in described auxiliary community; If dedicated preamble transmission reaches the still not success of maximum times random access procedure, stop random access procedure, and/or notify random access procedure failure by RRC or MAC message to network side; Wherein, the accidental access response window of use adopts the configuration value of main plot, or the configuration value of the affiliated auxiliary community of preamble transmission, or requires the parameter value of He Fu community, main plot to equate.
Wherein, the modules of apparatus of the present invention can be integrated in one, and also can separate deployment.Above-mentioned module can be merged into a module, also can further split into multiple submodules.
Through the above description of the embodiments, those skilled in the art can be well understood to the mode that the present invention can add essential general hardware platform by software and realize, and can certainly pass through hardware, but in a lot of situation, the former is better execution mode.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions (can be personal computers in order to make a computer equipment, server, or the network equipment etc.) carry out the method described in each embodiment of the present invention.
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can be distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices that are different from the present embodiment.The module of above-described embodiment can be merged into a module, also can further split into multiple submodules.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Disclosed is above only several specific embodiment of the present invention, and still, the present invention is not limited thereto, and the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.