CN102958073B - Support that the UE of parallel PRACH transmission obtains the method for Timing Advance - Google Patents
Support that the UE of parallel PRACH transmission obtains the method for Timing Advance Download PDFInfo
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- CN102958073B CN102958073B CN201110240206.8A CN201110240206A CN102958073B CN 102958073 B CN102958073 B CN 102958073B CN 201110240206 A CN201110240206 A CN 201110240206A CN 102958073 B CN102958073 B CN 102958073B
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Abstract
The invention provides and support that the UE of parallel PRACH transmission obtains the method for TA, comprise: in described UE walks abreast each random access procedure of initiating on SCell of carrying out, network side is that UE distributes the PRACH resource that can calculate different RA-RNTI and/or distributes different dedicated preamble on the parallel SCell carried out; And/or, utilize RAR message to carry TA and affiliated TA group information thereof; And/or, do you utilize MAC? CE or RRC signaling carries the TA group information be used to indicate belonging to timing advance TA, be the indication information simultaneously utilizing MAC head to carry or new LCID value to indicate MAC? CE or RRC signaling, UE monitors according to C-RNTI and the PDCCH that decodes receives the message belonging to self, and extracts corresponding TA and the TA group information belonging to it.Can UE according to the RAR message received or MAC by the present invention? CE or RRC signaling message determines each TA group corresponding to TA value, thus correctly can distinguish the TA group belonging to different TA.
Description
Technical field
The present invention relates to the acquiring technology of Timing Advance in communication system, particularly support that the UE of parallel PRACH transmission obtains the method for Timing Advance.
Background technology
Radio access technology is an important technology of medium education in communication system.Uplink timing advance (TA) can be obtained by random access procedure.Stochastic accessing mainly contains two kinds of patterns, based on the Stochastic accessing of competition with based on non-competing Stochastic accessing.Fig. 1 is noncompetitive pattern random access procedure figure in existing Release-10 agreement, and specifically this random access procedure comprises:
Step 0:eNB indicates UE to carry out Stochastic accessing lead code used (Msg0);
Particularly, the content of Msg0 comprises PRACH channel resource and Special leader (Preamble) code that UE initiates the use of non-competing Stochastic accessing.
Step 1:UE sends above-mentioned lead code (Msg1) in ascending physical signal Random Access Channel PRACH;
Particularly, the PRACH channel resource that UE obtains in step 0 sends special Preamble code.
Step 2:eNB is at DL-SCH channel accidental access response (Msg2);
Particularly, eNB is according to the PRACH Resource Calculation RA-RNTI distributed, the RA-RNTI scrambling PDCCH utilizing this to calculate, and the instruction transmission position of accidental access response (RAR) message on PDSCH on PDCCH after this scrambling; RAR message is carried in relevant position on PDSCH.Wherein, the RAPID in RAR message is preamble information, also comprises uplink timing advance (TA) in this RAR message simultaneously.UE receives with the PDCCH of RA-RNTI scrambling, to determine the resource location information on PDSCH; The respective resources position of PDSCH receives RAR message according to RAPID.
In Release-10 agreement, RAN4 defines to be supported at most in 2 band and carries out intra-band carrier aggregation and/or inter-band carrier aggregation.In the wireless communication system in future, various new business can continue to bring out, and the requirement of uplink service speed is more and more higher.Along with the increase can carrying out carrier aggregation band quantity, in Rel-11 and later release, support that the UE of inter-band carrier aggregation can get more and more, thus need the demand of many TA also can be increasing.Current RAN2 clearly, supports that the UE of many TA at least will support 2 TA groups.
Many TA scene is supported for Release-11, RAN2 has discussed and has determined to support that UE carries out the TA value that random access procedure obtains different TA group on SCell, the conclusion reached at present is, the SCell of different TA group carries out random access procedure, thus obtain the TA value of corresponding TA group, the processing mode specifically determined is as follows:
1. be supported on SCell and carry out noncompetitive pattern Stochastic accessing;
2. support to send random access resource by PDCCHOrder mode;
3.Msg0 and PDCCHOrder sends on dispatching cell;
4.Msg1 can only send on the SCell carrying out Stochastic accessing;
Except above-mentioned 4 determine except, also have following 2 just under discussion:
The transmission position of 5.RAR and corresponding PDCCH;
6. whether can carry out PRACH transmission simultaneously.
With regard to above-mentioned 5th point, if send RAR and corresponding PDCCH on SCell, so can there are the following problems:
Random access procedure in Release-10 agreement as shown in Figure 1, only support that UE carries out Stochastic accessing on PCell, and RAR message sends on PCell.With the PDCCH of RA-RNTI scrambling only at public search space, therefore, in the flow process shown in Fig. 1, UE monitors the public search space of PCell, to receive the PDCCH of RA-RNTI scrambling.If send RAR message on SCell, then need to monitor with the PDCCH of RA-RNTI scrambling on SCell, also just need the public search space monitoring SCell.And support that UE carries out the monitoring of SCell public search space, the blind solution to public search space can be increased, need very large power consumption, and too increase the complexity of UE process to a certain extent.
If still send RAR and corresponding PDCCH on PCell, and still utilize RA-RNTI scrambling PDCCH, UE just can only be allowed to monitor on PCell with the public search space of RA-RNTI scrambling PDCCH.But because the RA-RNTI that uses in random access procedure and dedicated preamble are all cell-level parameters, therefore, different communities can use identical RA-RNTI and dedicated preamble.Identical RA-RNTI and dedicated preamble is employed if there is multiple UE, some UE may be caused to receive indicate the RAR information that receives not to one's name with the PDCCH of RA-RNTI scrambling and by the RAPID in MAC head, finally causes these UE to obtain wrong TA value.
With regard to above-mentioned 6th point, if support parallel PRACH transmission, obviously can reduce propagation delay time, but just may occur that same UE uses identical RA-RNTI and dedicated preamble when parallel PRACH transmission, so this UE monitors and obtains the instruction of RAR resource with the PDCCH of RA-RNTI scrambling on its PCell, and when obtaining corresponding RAR according to RAPID, the UE TA that cannot distinguish in the RAR of reception comes from which TA group of UE.
Summary of the invention
The invention provides and support that the UE of parallel PRACH transmission obtains the method for Timing Advance, can correctly receive when carrying out parallel PRACH and transmitting and distinguish TA value corresponding to different TA group, not increase the complexity of UE process simultaneously.
For achieving the above object, the present invention adopts following technical scheme:
The UE supporting parallel PRACH to transmit obtains a method for Timing Advance, comprising:
For each mutually different RA-RNTI of parallel PRACH transmission configuration and/or dedicated preamble of described UE, and on the SCell of described UE, initiate parallel random access procedure, UE sends dedicated preamble corresponding to each parallel PRACH transmission described on SCell;
To each in each parallel PRACH transmission described, network side sends the PDCCH transmitting corresponding RA-RNTI scrambling with this PRACH on the PCell of described UE, and utilizes described PDCCH instruction to comprise the position that this PRACH transmits the accidental access response RAR of corresponding dedicated preamble;
Described UE monitors the PDCCH of each parallel PRACH transmission on PCell, and according to the dedicated preamble in the RAR message indicated RA-RNTI and/or each PDCCH of each PDCCH scrambling, determine the PRACH transmission that the timing advance TA of carrying in the RAR message that each PDCCH indicates is corresponding, then determine the TA group that the TA that carries in RAR message described in each is corresponding.
Preferably, the described mutually different RA-RNTI of each parallel PRACH transmission configuration for UE comprises: be each parallel PRACH transmission configuration PRACH resource of UE, and ensures different according to each RA-RNTI of described PRACH Resource Calculation.
The UE supporting parallel PRACH to transmit obtains a method for Timing Advance, comprising:
In described UE walks abreast each random access procedure of initiating on SCell of carrying out, in the accidental access response RAR message of each described random access procedure, carry the TA group information in this RAR message belonging to TA;
Described UE extracts corresponding TA and the TA group information belonging to it according to the RAR message received.
Preferably, described TA group information of carrying in the RAR message of each random access procedure in this RAR message belonging to TA comprises:
A newly-increased byte before the first byte of Release-10 agreement MACRAR form, and the first bit of this newly-increased byte is set to 1, all the other bits of the newly-increased byte of utilization carry the TA group information in this RAR message belonging to TA.
Preferably, utilize all the other bits of newly-increased byte to carry described TA group information to be:
3 bits in all the other bits described are utilized to represent described TA group information.
Preferably, described TA group information of carrying in the RAR message of each random access procedure in this RAR message belonging to TA comprises:
The MACRAR had in the described RAR message of the same UE of identical MAC head is merged, and a byte is increased newly before first byte of first MACRAR, first bit of this newly-increased byte is set to 1, according to the corresponding relation of all the other bits of newly-increased byte preset and each TA group, be 1 by the bit set corresponding with TA group belonging to each TA comprised in each MACRAR merged;
Described identical MAC head is added by before the MACRAR after merging.
Preferably, described TA group information of carrying in the RAR message of each random access procedure in this RAR message belonging to TA comprises:
The MACRAR had in the described RAR message of the same UE of identical MAC head is merged, and a byte is increased newly before first byte of each MACRAR, first bit of this newly-increased byte is set to 1, using the second bit as extension field, after representing this MACRAR when described second bit set is 1, also comprise next MACRAR; All the other bits in described newly-increased byte except the first bit and the second bit are utilized to carry TA group information in corresponding MACRAR belonging to TA;
Described identical MAC head is added by before the MACRAR after merging.
Preferably, the interim C-RNTI field in RAR message described in each is set to be the C-RNTI of described UE distribution.
The UE supporting parallel PRACH to transmit obtains a method for Timing Advance, comprising:
In described UE walks abreast each random access procedure of initiating on SCell of carrying out, utilizing be the C-RNTI scrambling PDCCH that described UE distributes, indicate for carry TA with its belonging to the positional information of message on PDSCH of TA group information;
Described UE, according to the resource location indicated with the PDCCH of described C-RNTI descrambling, receives for carrying TA and the message of TA group information belonging to it.
Preferably, described for carrying TA and belonging to it, message of TA group information is: RAR message.
Preferably, described RAR message carries TA and described in it, mode of TA group information is:
A newly-increased byte before the first byte of Release-10 agreement MACRAR form, and the first bit of this newly-increased byte is set to 1, all the other bits of the newly-increased byte of utilization carry the TA group information in this RAR message belonging to TA.
Preferably, utilize all the other bits of newly-increased byte to carry described TA group information to be:
3 bits in all the other bits described are utilized to represent described TA group information.
Preferably, described RAR message carries TA and belonging to it, mode of TA group information is:
The MACRAR had in the described RAR message of the same UE of identical MAC head is merged, and a byte is increased newly before first byte of first MACRAR, first bit of this newly-increased byte is set to 1, according to the corresponding relation of all the other bits of newly-increased byte preset and each TA group, by the bit set corresponding with TA group belonging to each TA comprised in each MACRAR merged;
Described identical MAC head is added by before the MACRAR after merging.
Preferably, described RAR message carries TA and described in it, mode of TA group information is:
The MACRAR had in the described RAR message of the same UE of identical MAC head is merged, and a byte is increased newly before first byte of each MACRAR, first bit of this newly-increased byte is set to 1, using the second bit as extension field, after representing this MACRAR when described second bit set is 1, also comprise next MACRAR; All the other bits in described newly-increased byte except the first bit and the second bit are utilized to carry TA group information in corresponding MACRAR belonging to TA;
Described identical MAC head is added by before the MACRAR after merging.
Preferably, described for carrying TA and belonging to it, message of TA group information is: self-defining MAC control information unit; Wherein, any one value that to be the binary code of reservation logic channel logo be in 01011 to 11010 value of the LCID in the corresponding MAC head of described MACCE, be used to indicate described MACCE for carry TA with its belonging to TA group information.
Preferably, described for carrying TA and belonging to it, message of TA group information is: self-defining MACCE; Wherein, in the corresponding MAC head of described MACCE, the first bit or the second bit are set to 1, are used to indicate this MACCE for carrying absolute TA and TA group information belonging to it, and LCID are set to LCID corresponding to TACMACCE.
Preferably, described MACCE carries TA and belonging to it, mode of TA group information is:
In described MACCE, utilize the subelement be made up of every two bytes to carry the absolute TA in a random access procedure of described UE and the TA group information belonging to it; And first bit of described each subelement is set to extension field, also comprise next subelement after representing subunit when described extension field bit set; All the other bits in the first byte of each subelement except extension field bit are utilized to carry absolute TA and the TA group information belonging to it.
Preferably, 7 bits of the first byte in described MACCE and the one-to-one relationship of all TA groups is preset;
Described MACCE carries TA and belonging to it, mode of TA group information is: in first byte of described MACCE, according to the described corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure described; After described first byte, comprise N number of subelement, each subelement comprises two bytes, for carrying the absolute TA corresponding to each TA group of being set in described first byte successively; Wherein, described N is the TA number of carrying in this MACCE.
Preferably, 7 bits of the first byte in described MACCE and the one-to-one relationship of all TA groups is preset;
Described MACCE carries TA and belonging to it, mode of TA group information is: in first byte of described MACCE, according to the described corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure described; The absolute TA of each TA group correspondence be set in described first byte is carried successively after described first byte.
Preferably, described for carrying TA and belonging to it, message of TA group information is: self-defining MACCE; Wherein, the LCID in the corresponding MAC head of described MACCE is the LCID that TACMACCE is corresponding.
Preferably, described MACCE carries TA and belonging to it, mode of TA group information is:
In described MACCE, utilize the subelement be made up of every two bytes to carry the absolute TA in a random access procedure of described UE and the TA group information belonging to it; And first bit of described each subelement is set to 1, the second bit is set to extension field, also comprises next subelement after representing subunit when described extension field bit set; All the other bits in each subelement except the first bit and extension field bit are utilized to carry absolute TA and the TA group information belonging to it.
Preferably, the 2-8 bit of the first byte in described MACCE and the one-to-one relationship of all TA groups is preset;
Described MACCE carries TA and belonging to it, mode of TA group information is: in first byte of described MACCE, the first bit is set to 1, and being used to indicate what carry is absolute TA; According to the described corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure described; After described first byte, comprise N number of subelement, each subelement comprises two bytes, for carrying the absolute TA corresponding to each TA group of being set in described first byte successively; Wherein, described N is the TA number of carrying in this MACCE.
Preferably, the 2-8 bit of the first byte in described MACCE and the one-to-one relationship of all TA groups is preset;
Described MACCE carries TA and belonging to it, mode of TA group information is: in first byte of described MACCE, the first bit is set to 1, and being used to indicate what carry is absolute TA; According to the described corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure described; The absolute TA of each TA group correspondence be set in described first byte is carried successively after described first byte.
Preferably, described for carrying TA and belonging to it, message of TA group information is: RRC reconfiguration message or self-defined RRC information.
As seen from the above technical solution, three kinds of TA and TA group information getting methods are provided in the present invention, in first method, for each mutually different RA-RNTI of parallel PRACH transmission configuration and/or dedicated preamble of UE, thus make UE when monitoring PDCCH, the resource location at the RAR message place of different TA group can be distinguished according to different RA-RNTI, and/or distinguish the RAR message of different TA group according to different dedicated preamble, also just can distinguish TA value corresponding to different TA group.
In second method, change the form of current RAR message, utilize the RAR message after change to carry TA and the TA group information belonging to it, thus UE differentiation can be made to belong to TA group corresponding to self different TA; Meanwhile, the interim C-RNTI field of the RAR message after change is set to be the C-RNTI that UE distributes, thus enables UE correctly distinguish self RAR message with other UE.
In the third method, utilize the message of new definition to carry TA and affiliated TA group information thereof, thus distinguish the TA of different TA group; Meanwhile, think the C-RNTI scrambling PDCCH that UE distributes, indicate the positional information of above-mentioned new definition message on PDSCH, to distinguish the TA information of different UEs.
Accompanying drawing explanation
Fig. 1 is noncompetitive pattern random access procedure schematic diagram in existing Release-10 agreement;
Fig. 2 a is the first expansion RAR form provided in embodiment two.
Fig. 2 b is the second expansion RAR form provided in embodiment two.
Fig. 2 c is the third expansion RAR form provided in embodiment two.
Fig. 3 a is the MAC head that the first kind MACCE form that provides in embodiment three is corresponding.
Fig. 3 a (1) is the first the concrete form in the first kind MACCE form that provides in embodiment three.
Fig. 3 a (2) is the concrete form of the second in the first kind MACCE form that provides in embodiment three.
Fig. 3 a (3) is the third the concrete form in the first kind MACCE form that provides in embodiment three.
Fig. 3 b is the MAC head that the Equations of The Second Kind MACCE form that provides in embodiment three is corresponding.
Fig. 3 b (1) is the first the concrete form in the Equations of The Second Kind MACCE form that provides in embodiment three.
Fig. 3 b (2) is the concrete form of the second in the Equations of The Second Kind MACCE form that provides in embodiment three.
Fig. 3 b (3) is the third the concrete form in the Equations of The Second Kind MACCE form that provides in embodiment three.
Fig. 3 c is the first the concrete form of the MAC head that the 3rd class MACCE form that provides in embodiment three is corresponding.
Fig. 3 d is the concrete form of the second of the MAC head that the 3rd class MACCE form that provides in embodiment three is corresponding.
Embodiment
For making object of the present invention, technological means and advantage clearly understand, below in conjunction with accompanying drawing, the present invention is described in further details.
Basic thought of the present invention is: the UE supporting parallel PRACH transmission, when simultaneously on multiple SCell during initiating random access procedure, sending to the carrying in the message of TA value of UE, distinguishes the TA group information belonging to corresponding TA value.
Here, PCell and SCell of first illustratively UE.In carrier aggregation technology, a main plot (PCell) and one or more auxiliary community (SCell) are all existed for any carrier aggregation UE.First UE carries out Stochastic accessing on PCell, and sets up RRC connection; After Stochastic accessing on PCell completes, UE is assigned with C-RNTI, and this is identified at the whole network and uniquely refers to corresponding UE.
Provide three kinds of different TA acquisition methods in the present invention, different TA groups belonging to each TA received can be distinguished for certain UE.Next, by three embodiments, this two kinds of concrete grammars are described respectively.
Rel-11, for the scene supporting many TA, to the demand that the quantity of CC does not increase, configures 5 CC at most.If consider the demand of up-downgoing symmetrical service, up configurable 5 TA groups (if each CC regards an independent TA group as) to greatest extent.Therefore, the TA group index belonging to 3 bit identification is used in the following examples.
Wherein, in first method, the PDCCH arranging scheduling RAR message still transmits on PCell.And if restriction RAR and corresponding PDCCH only sends on PCell, concerning under different PCell or the UE carrying out Stochastic accessing on same SCell, can not there is any problem in the realization of random access procedure.Particularly, because the RA-RNTI that uses in random access procedure and dedicated preamble are all cell-level, and currently available technology for be all that different UEs carries out random access procedure under same community, although these UE RA-RNTI may identical (may be identical according to the RA-RNTI that different PRACH Resource Calculation goes out), when carrying out noncompetitive pattern Stochastic accessing, dedicated preamble is certainly not identical.Therefore, even if employ identical RA-RNTI, also can correctly receive respective RAR according to the difference of dedicated preamble.
But, in the present invention, assuming that UE supports parallel PRACH transmission, and meeting initiating random access procedure on multiple SCell simultaneously, to obtain the TA value of TA group corresponding to different SCell.That is, in the present invention, UE walks abreast the random access procedure carried out, and relate to multiple community, and between different districts, the use of RA-RNTI and dedicated preamble does not mutually restrict.In this case, if thrown the reins at the RA-RNTI of different SCell and dedicated preamble to same UE, just likely this UE employs identical RA-RNTI and dedicated preamble when parallel PRACH transmission, when so this UE monitors and obtains the instruction of RAR resource with the PDCCH of RA-RNTI scrambling and obtain corresponding RAR according to RAPID on its PCell, conventionally the UE TA that cannot distinguish in the RAR of reception comes from which TA group of UE.
For above-mentioned situation, the present invention provides the first concrete method obtaining TA below.
Embodiment one:
In the present embodiment, be each mutually different RA-RNTI of parallel PRACH transmission configuration and/or dedicated preamble of UE.Like this, by RA-RNTI and/or dedicated preamble, can distinguish and belong to the parallel PRACH transmission of each of same UE, thus can distinguish and transmit corresponding TA group from different PRACH.And for other process that parallel PRACH transmits, still identical with existing mode.
Particularly, the method of this acquisition TA comprises: be each mutually different RA-RNTI of parallel PRACH transmission configuration and/or dedicated preamble of UE, and on the SCell of this UE, initiating parallel random access procedure, UE sends dedicated preamble corresponding to each parallel PRACH transmission on SCell; To each in each parallel PRACH transmission, network side sends the PDCCH transmitting corresponding RA-RNTI scrambling with this PRACH on the PCell of UE, and utilizes PDCCH instruction to comprise the position that this PRACH transmits the accidental access response RAR of corresponding dedicated preamble; UE monitors the PDCCH of each parallel PRACH transmission on PCell, and according to the dedicated preamble in the RAR message indicated RA-RNTI and/or each PDCCH of each PDCCH scrambling, determine the PRACH transmission that the timing advance TA of carrying in the RAR message that each PDCCH indicates is corresponding, then determine the TA group that the TA that carries in each RAR message is corresponding.
Specifically when the RA-RNTI different for each parallel PRACH transmission configuration of UE, be still according to each parallel PRACH transmission configuration PRACH resource that existing mode is UE, and ensure that when distributing PRACH resource each RA-RNTI gone out according to corresponding PRACH Resource Calculation is different.
The present embodiment can compatible R9/R10, on PCell, only monitor the public search space of the PDCCH of RA-RNTI scrambling.
Embodiment two:
In the present embodiment, expand existing RAR form, increase the TA group mark belonging to corresponding TA, thus UE can be made correctly to distinguish TA group corresponding to RAR.Except modifying to RAR form, other process relating to random access procedure in the present embodiment can be identical with existing mode.
Method in concrete the present embodiment comprises: in UE walks abreast each random access procedure of initiating on SCell of carrying out, in the RAR message of each random access procedure, carry the TA group information in this RAR message belonging to TA; UE, according to the RAR message received, extracts corresponding TA and the TA group information belonging to it.
In the above-mentioned methods, for the amendment of RAR form, the mode of namely carrying TA group information can preset as required.The carrying mode of several recommendation is provided below in the present embodiment, concrete, before the first byte of existing RAR form, increase a byte, and the first bit increased in byte is set to P.Because RAR first bit of the prior art is reserved bit, fixing value is 0, therefore, expansion RAR first bit P is fixed value 1, can distinguish over existing RAR form, and indicates the information in form to be for expansion RAR.
Fig. 2 a is the first expansion RAR form provided in the present embodiment.As shown in Figure 2, this RAR form utilizes regular length only to carry the relevant information of a TA group of a UE.Particularly, this RAR form is a newly-increased byte on existing Release-10 agreement MACRAR form basis, and the first bit of newly-increased byte is set to P, and fixing value is 1; And utilize rear three bits instruction TA group information of newly-increased byte.All the other bits R is reserved bit.
Fig. 2 b is the second expansion RAR form provided in the present embodiment.As shown in Figure 2 b, this RAR form adopts bitmap mode to indicate in UE information to comprise which TA group relevant information.This representation is applicable to the identical situation of multiple expansion RAR correspondence MAC, multiple expansion RAR of identical MAC head can be merged, to reduce expense, specifically can comprise multiple TA group information of a UE.
Particularly, the MACRAR had in the RAR message of the same UE of identical MAC head merges by this RAR form, and a byte is increased newly before first byte of first MACRAR, first bit of this newly-increased byte is set to 1, according to the corresponding relation of all the other bits of newly-increased byte preset and each TA group, by the bit set corresponding with TA group belonging to each TA comprised in each MACRAR merged; Identical MAC head is added by before the MACRAR after merging.The C-RNTI that corresponding UE distributed is write in interim C-RNTI field.Due to C-RNTI be the whole network unique UE mark, therefore, it is possible to distinguish different UEs.In fig. 2 a, the first byte is newly-increased byte, is next that multiple MACRAR merges.
Fig. 2 c is the third expansion RAR form provided in the present embodiment.As shown in Figure 2 c, this RAR form adopts variable-length carrying to have the relevant information of a UE many TA groups or the TA group relevant information of multiple UE of identical MAC head.This representation is equally applicable to the identical situation of multiple expansion RAR correspondence MAC, multiple expansion RAR of identical MAC head can be merged, to reduce expense.
Particularly, the MACRAR had in the RAR message of the same UE of identical MAC head is merged, and a byte is increased newly before first byte of each MACRAR, first bit of this newly-increased byte is set to 1, using the second bit E as extension field, be also comprise next MACRAR after representing this MACRAR when the second bit set is 1, namely also comprise next RAR information; All the other bits in the newly-increased byte of utilization except the first bit and the second bit carry the TA group information in corresponding MACRAR belonging to TA; Identical MAC head is added by before the MACRAR after merging.The C-RNTI that corresponding UE distributed is write, in order to identify corresponding UE in interim C-RNTI field.
Certainly, above are only the present embodiment and provide three kinds of specifically expansion RAR forms, those skilled in the art can carry out the expansion of RAR form as required, for carrying corresponding TA group information.Here just repeat no more.
In addition, owing to being present in public search space with the PDCCH of RA-RNTI scrambling, if therefore RA-RNTI is identical, then cannot distinguish between the PDCCH being used to indicate the RAR message of different UEs.If dedicated preamble is also identical in the RAR message that further PDCCH indicates, the TA between different UEs so just cannot be distinguished.Based on this, in the present embodiment, further preferably, can be the C-RNTI that corresponding UE distributes by writing in interim C-RNTI field in each RAR message, like this, UE can accurately receive according to the value of this field the RAR message belonging to self.Even if different UEs uses identical RA-RNTI and dedicated preamble, also belong to the RAR message of self by the interim C-RNTI field identification of corresponding RAR message.
Embodiment three:
As described in embodiment two, if utilize prior art to monitor the PDCCH of RA-RNTI scrambling, to indicate RAR resource, because RA-RNTI is cell-level, and by the PDCCH of RA-RNTI scrambling at public search space, therefore, multiple UE employs identical RA-RNTI, UE may be caused to have received do not belong to the RAR problem of self.
Consider that UE carries out random access procedure on SCell mainly in order to obtain the absolute TA value of corresponding TA group, and UE has established RRC connection when carrying out the random access procedure on SCell, and be assigned with unique C-RNTI, so the present embodiment is by a kind of new MAC control information unit (CE) form or RRC signaling, or the expansion RAR form in embodiment two carries TA value and relevant TA group mark, the MACCE of carrying TA information, RAR message can send on PCell or arbitrary SCell, RRC signaling sends on PCell, and the PDCCH instruction by C-RNTI scrambling in accidental access response window obtains.
The process of the present embodiment is not by restriction when RA-RNTI and lead code configuration, and the deployment position of the relevant TA information of carrying is not also limited, as long as PCell or the SCell activated arbitrarily has downlink resource to transmit, its compatibility transmission means of Rel-10 version TACMACCE, scheduling flexibly, and can the capacity of elevator system.
Particularly, method in the present embodiment comprises: in UE walks abreast each random access procedure of initiating on SCell of carrying out, utilizing has been the C-RNTI scrambling PDCCH that UE distributes, indicates for carrying TA and the positional information of message on PDSCH of TA group information belonging to it; UE, according to the resource location indicated with the PDCCH of its C-RNTI descrambling, receives for carrying TA and the message of TA group information belonging to it.Wherein, carry TA and the message of TA group information belonging to it can be specifically a new MACCE or RRC signaling, the absolute TA value that carrying UE needs, and the TA group information belonging to identifying, and indicated by the PDCCH of C-RNTI scrambling and obtain.
Next, the present embodiment provides the self-defined message form of several recommendation, is divided into three kinds, and a kind of is expansion RAR message in embodiment two, and another kind is MACCE, and last one is RRC signaling.
Wherein, for the first self-defined message form, the expansion RAR message namely in embodiment two, its concrete form is identical with embodiment two, just repeats no more here.
In new MACCE, due to absolute TA value needs 11 bit, so need 11 bits to carry absolute TA value in the new MACCE form introduced in the present embodiment.Because the MACCE newly introduced needs to transmit on DL-SCH, a LCID is needed to indicate type belonging to MACCE.
New MACCE can be divided three classes.In the first kind, the LCID of the corresponding MAC head of MACCE is redefined; In Equations of The Second Kind and the 3rd class, the LCID of corresponding for MACCE MAC head is set to existing value.
Particularly, Fig. 3 a is the MAC head that first kind MACCE form is corresponding.Wherein, a new definition LCID, is used to indicate the new MACCE form introducing carrying TA, simultaneously TA group index belonging to instruction.Concrete LCID is any one in reserved value 01011 to 11010.
In this class MACCE form, concrete MACCE can adopt the concrete form as Fig. 3 a (1), Fig. 3 a (2) or Fig. 3 a (3).
As shown in Fig. 3 a (1), MACCE carry TA and the mode of TA group information belonging to it for: utilize in MACCE the subelement be made up of every two bytes carry absolute TA in a random access procedure of UE with its belonging to TA group information; And first of each subelement bit is set to extension field, also comprise next subelement after representing subunit when the set of extension field bit; All the other bits in the first byte of each subelement except extension field bit are utilized to carry absolute TA and the TA group information belonging to it.
As shown in Fig. 3 a (2), MACCE carries TA and belonging to it, mode of TA group information is: preset 7 bits of the first byte in MACCE and the one-to-one relationship of all TA groups; In first byte of MACCE, according to the corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure; After the first byte, comprise N number of subelement, each subelement comprises two bytes, for carrying the absolute TA corresponding to each TA group of being set in the first byte successively; Wherein, N is the TA number of carrying in this MACCE.
As shown in Fig. 3 a (3), MACCE carries TA and belonging to it, mode of TA group information is: preset 7 bits of the first byte in MACCE and the one-to-one relationship of all TA groups; In first byte of MACCE, according to the corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure; The absolute TA of each TA group correspondence be set in the first byte is carried successively after the first byte.If can not byte-aligned after arranging TA information in this form, then filling bit be used to ensure its byte-aligned.
Consider that LCID's is rare, in Equations of The Second Kind MACCE form, utilize the LCID that existing TACMACCE is corresponding, new definition MACCE form carries absolute TA value, TA group index belonging to instruction simultaneously, the 1st bit in form is set to 1, with distinguish LCID corresponding be MACCE form in this invention.Concrete Fig. 3 b is the MAC head that Equations of The Second Kind MACCE form is corresponding.Wherein, LCID value is 11101.
In this class MACCE form, concrete MACCE can adopt the concrete form as Fig. 3 b (1), Fig. 3 b (2) or Fig. 3 b (3).
As shown in Fig. 3 b (1), MACCE carry TA and the mode of TA group information belonging to it for: utilize in MACCE the subelement be made up of every two bytes carry absolute TA in a random access procedure of UE with its belonging to TA group information; And first of each subelement bit is set to 1, the second bit is set to extension field, also comprises next subelement after representing subunit when the set of extension field bit; All the other bits in each subelement except the first bit and extension field bit are utilized to carry absolute TA and the TA group information belonging to it.
As shown in Fig. 3 b (2), MACCE carries TA and belonging to it, mode of TA group information is: preset the 2-8 bit of the first byte in MACCE and the one-to-one relationship of all TA groups; In first byte of MACCE, the first bit is set to 1, being used to indicate what carry is absolute TA; According to the corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure described; After the first byte, comprise N number of subelement, each subelement comprises two bytes, for carrying the absolute TA corresponding to each TA group of being set in the first byte successively; Wherein, N is the TA number of carrying in this MACCE.
As shown in Fig. 3 b (3), MACCE carries TA and belonging to it, mode of TA group information is: in first byte of MACCE, the first bit is set to 1, and being used to indicate what carry is absolute TA; According to the corresponding relation preset, by bit set corresponding for TA group belonging to the TA corresponding with each random access procedure; The absolute TA of each TA group correspondence be set in the first byte is carried successively after the first byte.If can not byte-aligned after arranging TA information in this form, then filling bit be used to ensure its byte-aligned.
In the 3rd class MACCE form, identical with Equations of The Second Kind, utilize the LCID that existing TACMACCE is corresponding, a new definition MACCE form carries absolute TA value; Distinguish with Equations of The Second Kind, the reserved bit in MAC head is newly defined as T, and be set to 1.Concrete MAC head is as shown in Fig. 3 c and Fig. 3 d.
In this class MACCE form, concrete MACCE can adopt the concrete form as Fig. 3 a (1), Fig. 3 a (2) or Fig. 3 a (3).
The MACCE form of the above-mentioned several new definition provided for the present embodiment, for carrying absolute TA and affiliated TA group information thereof.
Can also be RRC signaling for carrying the message of absolute TA and affiliated TA group information thereof in the present embodiment, specifically can self-defined new RRC signaling or use RRC reconfiguration message.Concrete bearing mode can set according to actual needs, belongs to the common technology means of those skilled in the art, just repeats no more here.
The walk abreast UE of PRACH transmission of several supports provided in the above-mentioned the present invention of being obtains the method for TA information.By the way, UE accurately can distinguish TA value corresponding to different TA group, thus can ensure the realization that many TA apply.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (3)
1. the UE supporting concurrent physical Random Access Channel PRACH to transmit obtains a method for Timing Advance, and it is characterized in that, the method comprises:
In described UE walks abreast each random access procedure of initiating on auxiliary community SCell of carrying out, in the accidental access response RAR message of each described random access procedure, carry the TA group information in this RAR message belonging to tracking area TA;
Described UE extracts corresponding TA and the TA group information belonging to it according to the RAR message received;
Wherein, described TA group information of carrying in the RAR message of each random access procedure in this RAR message belonging to TA comprises:
A newly-increased byte before the first byte of Release-10 agreement MACRAR form, and the first bit of this newly-increased byte is set to 1, all the other bits of the newly-increased byte of utilization carry the TA group information in this RAR message belonging to TA; Or,
The MACRAR had in the described RAR message of the same UE of identical MAC head is merged, and a byte is increased newly before first byte of first MACRAR, first bit of this newly-increased byte is set to 1, according to the corresponding relation of all the other bits of newly-increased byte preset and each TA group, be 1 by the bit set corresponding with TA group belonging to each TA comprised in each MACRAR merged; Described identical MAC head is added by before the MACRAR after merging; Or,
The MACRAR had in the described RAR message of the same UE of identical MAC head is merged, and a byte is increased newly before first byte of each MACRAR, first bit of this newly-increased byte is set to 1, using the second bit as extension field, after representing this MACRAR when described second bit set is 1, also comprise next MACRAR; All the other bits in described newly-increased byte except the first bit and the second bit are utilized to carry TA group information in corresponding MACRAR belonging to TA; Described identical MAC head is added by before the MACRAR after merging.
2. method according to claim 1, is characterized in that, all the other bits that described utilization increases byte newly carry described TA group information and are:
3 bits in all the other bits described are utilized to represent described TA group information.
3. method according to claim 1 and 2, is characterized in that, the Temporary Cell Radio Network temporary mark TemporaryC-RNTI field in RAR message described in each is set to be the C-RNTI of described UE distribution.
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| CN106304312B (en) * | 2015-05-15 | 2019-11-29 | 上海诺基亚贝尔股份有限公司 | The method of timing advance order MAC CE is set in the carrier aggregation system of enhancing |
| WO2016183714A1 (en) | 2015-05-15 | 2016-11-24 | 华为技术有限公司 | Communication method and communication device |
| CN105307284B (en) * | 2015-11-30 | 2019-01-11 | 东莞酷派软件技术有限公司 | A kind of accidental access method and user equipment |
| WO2018023086A1 (en) * | 2016-07-29 | 2018-02-01 | Intel IP Corporation | Timing advance for beam forming systems |
| CN108307495B (en) | 2016-08-11 | 2020-12-04 | 华为技术有限公司 | Tracking processing method and device for UE in low power consumption mode |
| CN108811166B (en) * | 2017-05-05 | 2020-04-21 | 维沃移动通信有限公司 | Method and device for sending and receiving random access response message |
| CN109392180B (en) * | 2017-08-11 | 2021-06-29 | 中国移动通信有限公司研究院 | Random access method, network side equipment and mobile communication terminal |
| CN109392017B (en) * | 2017-08-11 | 2021-07-09 | 大唐移动通信设备有限公司 | Random access response method, device, base station and terminal |
| CN110034874B (en) * | 2018-01-11 | 2020-11-17 | 维沃移动通信有限公司 | Resource monitoring method, terminal and base station |
| CN110876183B (en) * | 2018-08-31 | 2022-01-14 | 华为技术有限公司 | RRC connection release method, related equipment and system |
| CN113114444B (en) * | 2019-01-11 | 2022-05-27 | 北京紫光展锐通信技术有限公司 | User terminal, control method thereof, and computer-readable storage medium |
| CN111277351B (en) * | 2019-01-28 | 2022-12-06 | 维沃移动通信有限公司 | Information processing method, terminal equipment and network side equipment |
| WO2021163835A1 (en) * | 2020-02-17 | 2021-08-26 | Oppo广东移动通信有限公司 | Method, apparatus and device for acquiring timing advance, and storage medium |
| WO2022115977A1 (en) * | 2020-12-01 | 2022-06-09 | Huawei Technologies Co., Ltd. | Systems and methods for providing timing advance (ta) values |
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