CN103313399B - Support method and the subscriber equipment of carrier aggregation - Google Patents

Support method and the subscriber equipment of carrier aggregation Download PDF

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Publication number
CN103313399B
CN103313399B CN201210065469.4A CN201210065469A CN103313399B CN 103313399 B CN103313399 B CN 103313399B CN 201210065469 A CN201210065469 A CN 201210065469A CN 103313399 B CN103313399 B CN 103313399B
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China
Prior art keywords
stag
scell
launch
autonomous
timing reference
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Active
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CN201210065469.4A
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Chinese (zh)
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CN103313399A (en
Inventor
杨涛
林晓翔
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Nokia Shanghai Bell Co Ltd
Alcatel Optical Networks Israel Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
Alcatel Optical Networks Israel Ltd
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Priority to CN201210065469.4A priority Critical patent/CN103313399B/en
Priority to PCT/IB2013/000539 priority patent/WO2013136173A1/en
Publication of CN103313399A publication Critical patent/CN103313399A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078—Timing of allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
    • H04W56/0045—Synchronisation arrangements compensating for timing error of reception due to propagation delay compensating for timing error by altering transmission time

Abstract

The present invention proposes a kind of support carrier aggregation method and corresponding subscriber equipment.According to the present invention, the method comprises determines that one from Stochastic accessing RA failure a Ge Cong community Scell of timing advance group sTAG, thus obscures the up UL transmitting timing reference generation of described sTAG; And or stop or terminating in the UL transmitting on all Scell of this sTAG, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.

Description

Support method and the subscriber equipment of carrier aggregation
Technical field
The present invention relates to the communications field, more specifically, the present invention relates to the method and subscriber equipment of supporting carrier aggregation.
Background technology
According to current standardization efforts, Scell (from community) Stochastic accessing RA will be supported in advanced Long Term Evolution project (LTE-A) R11, and up to the present, reach following agreement in 3 gpp:
--support only comprise Scell from timing advance group (sTAG);
--in sTAG, it is a Scell belonging to sTAG that up UL launches timing reference, and the UL that Pcell can only be main timing advance group (pTAG) launches timing reference;
--for sTAG, UL launch timing reference should Node B (eNB) in evolution synchronous with between subscriber equipment (UE), this is determined by RA process, this means, if eNB wishes that the UL indicating sTAG launches timing reference, so must trigger RA process on the Scell of correspondence, and the respective impact of this Scell becomes sub-carrier CC that the UL being considered to this sTAG is launched timing reference, to ensure that correct UL launches;
--if the Scell carrying out RA is deactivated, and such as, because packet data inactivity timer expires, so will interrupt RA process.
Therefore, the RA failure on two kinds of Scell is had at least.
The first: during its receive window, UE can not receive accidental access response (RAR);
The second: the Scell carrying out RA is deactivated.
In addition, according to current standardization efforts, discuss the RA failure on Scell, and the agreement below having reached:
--medium education (MAC) layer can not notify this RA failure of wireless heterogeneous networks (RRC) layer, therefore not trigger Radio Link Failure RLF.
--UE does not notify this RA failure of eNB, and eNB will by oneself detecting this RA failure.This means after UE recognizes a period of time of this RA failure, eNB just can detect this RA failure.
The relevant problem of another one is that UEUL adjusts launch time.
In UE side, there are two kinds of situations about to adjust launch time about the UL of a sTAG:
Situation 1: according to the TAC (timing advance order) received, the UL carried out about this sTAG adjusts launch time.
Situation 2: the downlink reception time of launching the Seell of timing reference according to the UL as this sTAG, carry out autonomous UL adjustment process launch time (such as, carrying out at two TAC reception periods) about this sTAG.
Situation 2 means that it is very important for launching timing reference for UE, UL during the normal UL of UE launches.RA unsuccessfully will make UE become to obscure, and the UL which Scell not knowing in this sTAG is only this sTAG launches timing reference.
Current, need to solve when RA failure, the UL how UE processes corresponding sTAG launches.
Summary of the invention
According to an aspect of the present invention, propose a kind of method supporting carrier aggregation, comprising: determine that one from Stochastic accessing RA failure a Ge Cong community Scell of timing advance group sTAG, thus the up UL transmitting timing reference generation of described sTAG is obscured; And
Stop or terminating in the UL transmitting on all Scell of this sTAG, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.
According to another aspect of the present invention, propose a kind of user equipment (UE) supporting carrier aggregation, comprising: determining device, for determining that one from Stochastic accessing RA failure a Ge Cong community Scell of timing advance group sTAG, thus the up UL transmitting timing reference generation of described sTAG being obscured; And control device, for otherwise stop or terminating in UL on all Scell of this sTAG launching, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.
Accompanying drawing explanation
By below in conjunction with the description of the drawings, and understand more comprehensively along with to of the present invention, other objects of the present invention and effect will become clearly and easy to understand, wherein:
Fig. 1 shows the wireless communication system that the present invention can implement wherein;
Fig. 2 shows the flow chart of the method for the support carrier aggregation according to an embodiment of the invention;
Fig. 3 shows the block diagram of the user equipment (UE) of the support carrier aggregation according to an embodiment of the invention.
In all above-mentioned accompanying drawings, identical label represents to have identical, similar or corresponding feature or function.
Embodiment
Embodiments of the present invention are described in detail below with reference to accompanying drawing.
Fig. 1 shows the wireless communication system 100 that the present invention can implement wherein.Such as, in this wireless communication system 100, carrier aggregation CA characteristic is introduced.
In the system introducing CA characteristic, UE uplink and downlink can pass through multiple one-tenth sub-carrier CC respectively, communicate with eNB.If for a UE, eNB thinks that these CC can share a timing advance TA value, as long as namely eNB adjusts TA value with reference to any one up transmission signal in these CC, this TA value can be used by these CC, then think that these CC belong to a timing advance group TAG.
When UE sets up RRC connection for the first time, eNB only configures a Serving cell to UE, i.e. main plot (Pcell).The carrier wave of Pcell is called principal component carrier wave (PCC).
According to the consideration such as load, QoS demand, eNB can configure one or more extra-service community to UE, Ji Cong community (Scell).The carrier wave of Scell is called from one-tenth sub-carrier (SCC).
That is, UE only has a Pcell, and in Frequency Division Duplexing (FDD) (FDD) system, this Pcell only has an a ULCC and descending DLCC.A UE can have one or more Scell, and each Scell also only has a ULCC and/or DLCC.Certainly, in time division duplex (TDD) system, Pcell and Scell only has a carrier wave, for uplink and downlink.
In addition, UE only has a pTAG, and this pTAG comprises Pcell, 0 or 1 an or more Scell.Further, UE can have 0 or one or more sTAG, and a sTAG can have one or more Scell.
That is, the TAG belonging to the CC of Pcell is pTAG, and TAG is in addition sTAG.
As shown in Figure 1, as an example, wireless communication system 100 comprises an eNB110 and UE120.Certainly, those skilled in the art will appreciate that system 100 can also comprise eNB110 and UE120 of more more number.
UE120 can be mobile phone, panel computer, notebook computer, desktop computer, personal digital assistant (PDA) etc.In addition, between eNB110 and UE120, there is Pcell130 and 4 Scell140-1,140-2,140-3,140-4.Certainly, those skilled in the art will appreciate that the number of Scell can be more or less, different cell can have different paths.
Here, without loss of generality, suppose that Scell140-1, Scell140-2 and Scell140-3 belong to sTAG1, and Scell140-4 belongs to sTAG2.
In LTE-AR10, RA only carries out on Pcell, and when PcellRA failure, is re-established by triggering RRC.But, for LTE-AR11, by performing the RA on Scell, to support many TA scene.
According to current standardization efforts, will be that UL launches timing reference for pTAG, Pcell.RA on the Scell of pTAG is only used to determine which TAG this Scell belongs to.Therefore, the RA failure on the Scell of pTAG, does not affect the upstream operation of pTAG.Therefore, the Scell on this pTAG be considered to still with eNB uplink synchronous.
If it is bad that eNB thinks that the current UL of a sTAG launches timing reference, such as, quality of wireless channel is poor, or current UL timing reference just may not will be released, be deactivated, so can use the RA on the Scell of sTAG, carry out new UL and launch timing reference instruction.If the RA failure on the new Scell of sTAG, so UE will not know which Scell is the new UL transmitting timing reference of this sTAG, and this can affect UE and adjusts operation launch time about the autonomous UL of described sTAG, and uplink interference may be caused to other UE potentially.
Fig. 2 shows the flow chart of the method for the support carrier aggregation according to an embodiment of the invention.
As shown in Figure 2, described method 200 comprises step S210: determine that one from Stochastic accessing RA failure a Ge Cong community Scell of timing advance group sTAG, thus obscures the up UL transmitting timing reference generation of described sTAG; And step S220: or stop or terminating in the UL transmitting on all Scell of this sTAG, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.
With reference to accompanying drawing 1, without loss of generality, the RA failure on the Scell1 of sTAG1 is supposed.
As mentioned above, after RA failure on the Scell1 determining sTAG1, stop or terminating in the UL transmitting on all Scell1, Scell2 and Scell3 of this sTAG1, or by taking corresponding measure, the UL continued on all Scell1, Scell2 and Scell3 of this sTAG1 launches.
RA unsuccessfully comprises following any one:
UE can not during receive window, receiving random access response RAR;
The described Scell carrying out RA is deactivated.
That is, when UE during receive window, can not receive corresponding accidental access response RAR, or the described Scell1 carrying out RA is deactivated, and so determines this sTAG
RA failure on this Scell1 of 1.
On this Scell1 determining this sTAG1 when RA failure, by stopping or stopping the UL transmitting on all Scell1, SceU2 and Scell3 of this sTAG1, the potential interference to other UE can be avoided.This corresponding timing advance timer (TAT:timeAlignmentTimer) that can be stopped by UE or stop running is realized.That is, when on the Scell1 of sTAG1, RA unsuccessfully occurs, UE must stop or corresponding TAT out of service, and the UL stopping at all Scell1, Scell2, Scell3 of this sTAG1 launches.Based on this solution, the UL that all Scell1, Scell2, Scell3 of this sTAG1 can not occur launches, and does not therefore have the potential interference to other UE.
According to current standardization efforts, on Scell RA unsuccessfully can not trigger RRC connect re-establish.RA unsuccessfully means that the UL transmitting timing reference instruction object about sTAG is unsuccessful.As mentioned above, UE launches the downlink reception time of the Scell of timing reference as the UL of a sTAG using following the tracks of, during launching at normal UL, adjust its launch time.Unsuccessfully by causing UE not know, the UL of this sTAG launches which Scell that timing reference is this sTAG to RA, and therefore affects the UL firing operation about this sTAG of UE.
According to an embodiment of the invention, described corresponding measure comprises the one in the first measure and the second measure.
Wherein the first measure comprise stop using the UL of described sTAG1 launch timing reference carry out the autonomous UL launch time adjustment process of user equipment (UE) about described sTAG1.
As mentioned above, originally, according to the downlink reception time that the UL of described sTAG1 launches timing reference, the autonomous UL launch time adjustment process of UE about described sTAG1 was carried out.According to the first measure, stop using the UL of described sTAG1 to launch timing reference and carry out the autonomous UL launch time adjustment process of user equipment (UE) about described sTAG1.This also means, UE is only according to the TAC received, and the UL carried out about this sTAG1 adjusts, and therefore can proceed the up transmitting of this sTAG1 launch time.
Wherein the second measure comprises following any one:
A) use the Scell1 of this RA failure to launch timing reference as the UL of described sTAG1, carry out autonomous UL adjustment process launch time of UE about described sTAG1;
B) before being used in the RA of this failure, the UL of described sTAG1 launches timing reference (such as Scell2), carries out autonomous UL adjustment process launch time of UE about described sTAG1;
C) this sTAG1 Scell is used to launch timing reference as the UL of described sTAG1, carry out the autonomous UL launch time adjustment process of UE about described sTAG1, such as, use the activation Scell (such as Scell3) of this sTAG1 to launch timing reference as the UL of described sTAG1, carry out the autonomous UL launch time adjustment process of UE about described sTAG1.
According to the second measure, the corresponding UL that UE can continue to follow the tracks of sTAG1 launches timing reference, carries out the autonomous UL launch time adjustment process of UE about described sTAG1, and therefore can proceed the up transmitting of this sTAG1.
In the second all measures, A kind second measure is preferred, because according to this A kind second measure, the UL that UE and eNB has identical sTAG1 launches timing reference record.
In addition, when sTAG1 only has a Scell, A kind second measure and B kind second measure are in fact identical.
Timing reference can be launched according to the UL according to sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG to the influence degree of system, determine that the UL stopping or terminating on all Scell of this sTAG launches, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.If do not have correct UL to launch timing reference, cause serious uplink interference by other UE, so determine that the UL stopping or terminating on all Scell of this sTAG launches.On the other hand, if UE is not an important factor about autonomous UL adjustment process launch time of described sTAG, particularly when the short time interval, so by taking corresponding measure, the UL continued on all Scell of this sTAG launches.Wherein the first measure makes UE launch timing reference at the UL of this sTAG to produce in the short time range obscured, the UL following the tracks of this sTAG is stopped to launch the time of reception of timing reference, and the interim UL that the second measure provides this sTAG to UE launches timing reference, to meet autonomous UL adjustment process launch time of UE, thus UE can continue the up transmitting of this sTAG.
According to an embodiment of the invention, method 200 also comprises step S230: the upper RA success of another Scell (such as Scell2) of RA success or described sTAG1 again on the described Scell1 determining described sTAG1; And step S240: the UL recovered on all Scell1, Scell2 and Scell3 of this sTAG1 launches, and use the successful Scell of this RA to launch timing reference as the UL of described sTAG1, carry out the autonomous UL launch time adjustment process of UE about described sTAG1.
When eNB also notices the RA failure of the Scell1 of this sTAG1, the described Scell1 of this sTAG1 carries out RA again or carry out RA on another Scell (such as Scell2) of described sTAG1.
Fig. 3 shows the block diagram of the user equipment (UE) of the support carrier aggregation according to an embodiment of the invention.
As shown in Figure 3, described UE300 comprises: determining device 310, for determining that one from Stochastic accessing RA failure a Ge Cong community Scell of timing advance group sTAG, thus obscures the up UL transmitting timing reference generation of described sTAG; And control device 320, for otherwise stop or terminating in UL on all Scell of this sTAG launching, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.
According to an embodiment of the invention, described corresponding measure comprises the one in the first measure and the second measure,
Wherein the first measure comprise stop using the UL of described sTAG launch timing reference carry out the autonomous UL launch time adjustment process of user equipment (UE) about described sTAG;
Second measure comprises following any one:
Use the Scell of this RA failure to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG;
Before being used in the RA of this failure, the UL of described sTAG launches timing reference, carries out the autonomous UL launch time adjustment process of UE about described sTAG;
Use this sTAG Scell to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG.
According to an embodiment of the invention, according to the downlink reception time that the UL of described sTAG launches timing reference, carry out the autonomous UL launch time adjustment process of UE about described sTAG.
According to an embodiment of the invention, use the activation Scell of this sTAG to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG.
According to an embodiment of the invention, UE carries out between two early timing orders about autonomous UL adjustment process launch time of described sTAG, and wherein said early timing order is for adjusting the UL launch time of UE about described sTAG.
According to an embodiment of the invention, also on the described Scell determining described sTAG, the upper RA of another Scell of RA success or described sTAG is successfully again for described determining device 310; And described control device 320 is also launched for the UL recovered on all Scell of this sTAG, and use the successful Scell of this RA to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG.
According to an embodiment of the invention, RA unsuccessfully comprises following any one:
UE can not during receive window, receiving random access response RAR;
The described Scell carrying out RA is deactivated.
According to an embodiment of the invention, by stopping or the timing advance timer TAT of this sTAG that stops running, to stop or the UL terminated on all Scell of this sTAG launches.
It should be noted that to make the present invention be easier to understand, description above eliminates to be known for a person skilled in the art and may to be required some ins and outs more specifically for realization of the present invention.
Those skilled in the art it is also understood that and the invention is not restricted to step described above, and the present invention also comprises the combination, sequential transformations etc. carried out step described above.Final scope of the present invention is defined by the appended claims.
Therefore; selecting and describing execution mode is to explain principle of the present invention and practical application thereof better; and those of ordinary skill in the art are understood, under the prerequisite not departing from essence of the present invention, all modifications and change all fall within protection scope of the present invention defined by the claims.

Claims (16)

1. support a method for carrier aggregation, comprising:
Determine that one from Stochastic accessing RA failure a Ge Cong community Scell of timing advance group sTAG, thus the up UL transmitting timing reference generation of described sTAG is obscured; And
Stop or terminating in the UL transmitting on all Scell of this sTAG, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.
2. method according to claim 1,
Wherein said corresponding measure comprises the one in the first measure and the second measure,
Wherein the first measure comprise stop using the UL of described sTAG launch timing reference carry out the autonomous UL launch time adjustment process of user equipment (UE) about described sTAG;
Second measure comprises following any one:
Use the Scell of this RA failure to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG;
Before being used in the RA of this failure, the UL of described sTAG launches timing reference, carries out the autonomous UL launch time adjustment process of UE about described sTAG;
Use this sTAG Scell to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG.
3. method according to claim 2, wherein launches the downlink reception time of timing reference, carries out the autonomous UL launch time adjustment process of UE about described sTAG according to the UL of described sTAG.
4. method according to claim 2, wherein uses the activation Scell of this sTAG to launch timing reference as the UL of described sTAG, carries out the autonomous UL launch time adjustment process of UE about described sTAG.
5. method according to claim 2, wherein UE carries out between two early timing orders about autonomous UL adjustment process launch time of described sTAG, and wherein said early timing order is for adjusting the UL launch time of UE about described sTAG.
6. method according to claim 1, also comprises:
On the described Scell determining described sTAG, the upper RA of another Scell of RA success or described sTAG is successfully again; And
The UL recovered on all Scell of this sTAG launches, and uses the successful Scell of this RA to launch timing reference as the UL of described sTAG, carries out the autonomous UL launch time adjustment process of UE about described sTAG.
7. method according to claim 1, wherein RA unsuccessfully comprises following any one:
UE can not during receive window, receiving random access response RAR;
The described Scell carrying out RA is deactivated.
8. method according to claim 1, wherein by stopping or the timing advance timer TAT of this sTAG that stops running, to stop or the UL terminated on all Scell of this sTAG launches.
9. support a user equipment (UE) for carrier aggregation, comprising:
Determining device, for determining that one from Stochastic accessing RA failure a Ge Cong community Scell of timing advance group sTAG, thus obscures the up UL transmitting timing reference generation of described sTAG; And
Control device, for otherwise stop or terminating in UL on all Scell of this sTAG launching, or by taking corresponding measure, the UL continued on all Scell of this sTAG launches.
10. UE according to claim 9,
Wherein said corresponding measure comprises the one in the first measure and the second measure,
Wherein the first measure comprise stop using the UL of described sTAG launch timing reference carry out the autonomous UL launch time adjustment process of user equipment (UE) about described sTAG;
Second measure comprises following any one:
Use the Scell of this RA failure to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG;
Before being used in the RA of this failure, the UL of described sTAG launches timing reference, carries out the autonomous UL launch time adjustment process of UE about described sTAG;
Use this sTAG Scell to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG.
11. UE according to claim 10, wherein launch the downlink reception time of timing reference, carry out the autonomous UL launch time adjustment process of UE about described sTAG according to the UL of described sTAG.
12. UE according to claim 10, wherein use the activation Scell of this sTAG to launch timing reference as the UL of described sTAG, carry out the autonomous UL launch time adjustment process of UE about described sTAG.
13. UE according to claim 10, wherein UE carries out between two early timing orders about autonomous UL adjustment process launch time of described sTAG, and wherein said early timing order is for adjusting the UL launch time of UE about described sTAG.
14. UE according to claim 9, wherein:
Also on the described Scell determining described sTAG, the upper RA of another Scell of RA success or described sTAG is successfully again for described determining device; And
Described control device is also launched for the UL recovered on all Scell of this sTAG, and uses the successful Scell of this RA to launch timing reference as the UL of described sTAG, carries out the autonomous UL launch time adjustment process of UE about described sTAG.
15. UE according to claim 9, wherein RA unsuccessfully comprises following any one:
UE can not during receive window, receiving random access response RAR;
The described Scell carrying out RA is deactivated.
16. UE according to claim 9, wherein by stopping or the timing advance timer TAT of this sTAG that stops running, to stop or the UL terminated on all Scell of this sTAG launches.
CN201210065469.4A 2012-03-13 2012-03-13 Support method and the subscriber equipment of carrier aggregation Active CN103313399B (en)

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US10075279B2 (en) 2013-11-25 2018-09-11 Lg Electronics Inc. Method for deactivating secondary cells by a base station and device therefor
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CN102118801A (en) * 2011-03-31 2011-07-06 电信科学技术研究院 Method and device for unlink transmission in multicarrier aggregation system

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Co-patentee after: Alcatel Optical Networks Israe

Patentee after: Shanghai NOKIA Baer Limited by Share Ltd

Address before: 201206 Shanghai, Pudong Jinqiao Ning Bridge Road, No. 388, No.

Co-patentee before: Alcatel Optical Networks Israe

Patentee before: Shanghai Alcatel-Lucent Co., Ltd.

CP03 Change of name, title or address