CN105992349B - A method of for notifying the TDD uplink-downlink configuration of dynamic change - Google Patents
A method of for notifying the TDD uplink-downlink configuration of dynamic change Download PDFInfo
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Abstract
The method for the TDD uplink-downlink configuration that the present invention provides a kind of for notifying dynamic change.According to embodiment of the present invention, it is proposed a kind of method in the base station based on carrier wave polymerization enhancing and the communication system of eIMTA for the TDD uplink-downlink configuration to notification of user equipment dynamic change, n component carrier is wherein configured in the communication system, n is greater than 5, which comprises the n component carrier is divided into m component carrier group；And m Downlink Control Information is sent to the user equipment, wherein the format of the Downlink Control Information is 1C and each Downlink Control Information respectively includes reconfiguring for the TDD uplink-downlink configuration of one-component carrier wave set.The eIMTA in the case of the CA enhancing more than 5 component carriers can be supported through the invention.
Description
Technical field
The present invention relates to mobile communication technologies, more particularly to one kind dynamically to become for sending a notice in LTE enhanced carrier aggregation
The method of the TDD uplink-downlink configuration of change.
Background technique
In RAN#66 meeting, the LTE carrier aggregation (carrier of 5 component carriers or more is had approved
Aggregation, CA) enhancing job scheme.Meanwhile LTE being extended in 5GHz bandwidth exempt from licensed band in the recent period
Great attention rate is obtained.Other than the bandwidth for being widely used for LTE, in other bandwidth (such as 3.5GHz), this
Kind distribution can also realize more than one carrier wave in a frequency range.In addition, RAN4 is (outstanding in terms of the standard in relation to CA demand
It is in the downstream direction) make good progress.Multiple 3-DL CA jobs have been completed, and multiple 4-DL CA configuration is discussing
In.As described above, the chance for effectively utilizing available frequency band will be provided more than the CA enhancing of 5 carrier waves, to meet communication
It needs.
In Rel-12eIMTA, reach an agreement on for supporting eIMTA (Enhanced Interference Management
With Traffic Adaption namely TDD uplink and downlink dynamic configuration) user equipment (user equipment, UE) it is new
RNTI and format be 1C Downlink Control Information (downlink control information, DCI).This DCI will
Notify the TDD uplink/downlink configuration of the dynamic change of eIMTA component carrier.This DCI that reconfigures will at least carry 3 bits
Having to explicitly indicate one in existing 7 kinds of uplink/downlinks configuration.Dominant reconfigures DCI at least one main plot
It is transmitted in the public search space of PDCCH.If DCI is transmitted in the public search space of the PDCCH of main plot, it to be used for phase
Two or more indicators (each is 3 bits) of the cell of the two or more support eIMTA answered can be included in
One dominant to reconfigure in DCI, will be sent to the UE for being configured with two or more cells for supporting eIMTA.Also, it will
The mapping relations between the uplink/downlink configuration of the cell and 3 bits of supporting eIMTA are informed via high-level signaling.
In the case of enhancing is more than 5 component carriers, for eIMTA, the DCI that original format is 1C may
It is not enough to support the supplementary cell until 32 eMITA.Because each TDD uplink/downlink configuration is 3 bits, so as to be reconfigured
The quantity of the supplementary cell of the support eMITA set isHere, Lformat1cPayload size (26 equal to format 1C
Bit), therefore the DCI that format is 1C will only support 8 component carriers namely 8 supplementary cells.Obviously, this is far from enough
's.Therefore, in the present invention, some modes will be proposed, in the case where being used to improve for the CA enhancing more than 5 carrier waves
The TDD uplink/downlink configuration of eIMTA reconfigures.
Summary of the invention
In order to solve the above-mentioned technical problem, according to the first aspect of the invention, propose a kind of based on carrier wave polymerization increasing
Method in the base station of strong and eIMTA communication system for from the TDD uplink-downlink configuration to notification of user equipment dynamic change,
In in the communication system be configured with n component carrier, n be greater than 5, which comprises by the n component carrier division
For m component carrier group；And m Downlink Control Information is sent to the user equipment, wherein the Downlink Control Information
Format is 1C and each Downlink Control Information respectively includes reconfiguring for the TDD uplink-downlink configuration of one-component carrier wave set.
Preferably, Xiang Suoshu user equipment send high-level signaling, the high-level signaling include the m component carrier group and
Each component carrier in the mapping relations of the m Downlink Control Information and each component carrier group and corresponding downlink
Control the mapping relations of the TDD uplink-downlink configuration in information reconfigured.
Preferably, described m lower control information is sent to the user equipment in a time multiplexed manner.
Preferably, downlink in the last one radio frames in the period of the TDD uplink-downlink configuration dynamic change
The m Downlink Control Information is sent on frame and special subframe.
Preferably, by the downlink subframe and the multiple subframe collection of the special sub-frame division, and on each subframe collection
Corresponding Downlink Control Information is sent respectively.
Preferably, the downlink subframe and the special subframe are determined according to the TDD uplink-downlink configuration that SIB 1 is configured.
Preferably, the period of the TDD uplink-downlink configuration dynamic change include at least 10 milliseconds, 20 milliseconds, 40 milliseconds and
80 milliseconds.
Preferably, when being more than or equal to 40 milliseconds in the period of the TDD uplink-downlink configuration dynamic change, in the period
M radio frames in send corresponding Downlink Control Information respectively.
Preferably, 32 n, and m is 4.
According to the second aspect of the invention, it proposes a kind of based on carrier wave polymerization enhancing and the communication system of eIMTA
Method in base station for from the TDD uplink-downlink configuration to notification of user equipment dynamic change, wherein matching in the communication system
It is equipped with n component carrier, n is greater than 5, which comprises the n component carrier is divided into m component carrier group, and
For m eIMTA-RNTI of the user device configuration, wherein the m component carrier group and the m eIMTA-RNTI are one by one
It is corresponding；And downlink subframe in the last one radio frames in the period of TDD uplink-downlink configuration dynamic change and especially sub
M Downlink Control Information is sent simultaneously on frame, wherein the format of the Downlink Control Information is 1C and each downlink control letter
Breath respectively includes reconfiguring for the TDD uplink-downlink configuration of one-component carrier wave set.
According to the third aspect of the invention we, it proposes a kind of based on carrier wave polymerization enhancing and the communication system of eIMTA
Method in base station for from the TDD uplink-downlink configuration to notification of user equipment dynamic change, wherein matching in the communication system
It is equipped with n component carrier, n is greater than 5, which comprises one Downlink Control Information of selection, and sent out to the user equipment
The Downlink Control Information is sent, wherein the length of the Downlink Control Information is greater than the length for the Downlink Control Information that format is 1C
Degree, and the Downlink Control Information includes that k TDD uplink and downlink reconfigures, and corresponds respectively to k component carrier, wherein k≤
n；Or the first Downlink Control Information is sent to the user equipment, wherein the length of first Downlink Control Information is suitable for including
N TDD uplink and downlink reconfigures, and corresponds respectively to n component carrier.
Preferably, in the case of sending first Downlink Control Information, the length of first Downlink Control Information
For 96 bits.
In the present invention, a kind of new signaling solution is proposed, can support that the CA more than 5 component carriers increases
EIMTA in the case of strong.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 shows the TDD or more according to an embodiment of the invention for notification of user equipment dynamic change
The flow chart of the method for row configuration；And
Fig. 2 shows according to another embodiment of the invention for the TDD to notification of user equipment dynamic change
The flow chart of the method for downstream arrangements.
Run through different diagrams in the figure, same or similar appended drawing reference indicates identical or corresponding component or spy
Sign.
Specific embodiment
Before introducing the present invention, some dynamic recognition DCI with L1 layer that is reaching an agreement in Rel-12 will be introduced first
Relevant content.
The quantity for being allocated to the eIMTA-RNTI of a UE is 1.
EIMTA-RNTI is specifically configured by RRC signaling come UE；
Different UE can be configured different eIMTA-RNTI.
The period for reconfiguring DCI at least may include: 10ms, 20ms, 40ms and 80ms.
The mapping relations reconfigured between DCI and cell are specifically configured by RRC signaling come UE.
Subframe collection is specifically configured come UE by RRC signaling, UE monitors these subframe collection to obtain dominant reconfigure
DCI。
The subframe collection that DCI is reconfigured for monitoring acquisition that UE may be used is based on:
For the period of 10ms, subframe collection is the downlink subframe and specific sub-frame of SIB1 message arrangement.
For the period of 20ms, subframe collection is the downlink of the SIB1 message arrangement in second radio frames in the cycle
Subframe and specific sub-frame.
For the period of 40ms, subframe collection is the downlink of the SIB1 message arrangement in the 4th radio frames in the cycle
Subframe and specific sub-frame.
For the period of 80ms, subframe collection is downlink of the SIB1 message arrangement in the 8th radio frames in the period
Frame and specific sub-frame.
For configured with main plot be FDD, supplementary cell support eIMTA UE, the bit map of 10 bits be used for by
Subframe collection in n-th of subframe is configured to L1 layers of monitoring and reconfigures DCI, and wherein n is the period for reconfiguring DCI for monitoring L1 layers
(as unit of radio frames).
Based on above-mentioned agreement, the present invention will propose the weight of enhancing for the eIMTA with the CA enhancing more than 5 component carriers
Configure DCI.
Scheme 1: still using current L1 layers dynamic recognition signaling format DCI 1C and think it is following agreement still
Effectively.
The quantity for being allocated to the eIMTA-RNTI of a UE is 1
EIMTA-RNTI is specifically configured by RRC signaling come UE；
Different UE can be configured different eIMTA-RNTI.
If the quantity of component carrier is more than 5, component carrier is divided into different component carrier groups, and with the time-division
The mode of multiplexing is reconfigured via the TDD ascending-descending subframes that the DCI that multiple formats are 1C will correspond to different component carrier groups
It sets and is sent to UE.
Here, the TDD uplink-downlink configuration configured according to SIB 1 is determined above-mentioned downlink subframe and special subframe
Furthermore it is possible to which each component carrier group and multiple formats is notified to close for the mapping of the DCI of 1C via high-level signaling
Each component carrier and the TDD uplink-downlink configuration in corresponding Downlink Control Information in system and each component carrier group
The mapping relations reconfigured.For different component carrier groups, they for example be can have and week for limiting in Rel-12eIMTA
Phase in identical period, i.e., 10,20,40 and 80ms.Certainly, they also can have the period of such as 120ms.
Specific implementation for time division multiplexing mode, such as can be under any SIB1 instruction of any frame within the period
DCI can be transmitted in capable and special subframe.Preferably, it can be considered that following manner:
Mode 1:
Fig. 1 shows the TDD or more according to an embodiment of the invention for notification of user equipment dynamic change
The flow chart of the method for row configuration.
As shown in Figure 1, in step s101, n component carrier is divided into m component carrier group first.
In step s 102, the downlink in the last one radio frames in the period of TDD uplink-downlink configuration dynamic change
M Downlink Control Information is sent to UE respectively in subframe and special subframe.
Specifically, also that downlink subframe and special sub-frame division is multiple and different subframe collection herein, and in each subframe
Corresponding Downlink Control Information is sent to UE respectively on collection.Here, the format of Downlink Control Information is 1C and each downlink control
Information processed respectively includes reconfiguring for the TDD uplink-downlink configuration of one-component carrier wave set.
In addition, also high-level signaling will be sent to UE comprising the mapping of m component carrier group and m Downlink Control Information
Each component carrier in relationship and each component carrier group and the TDD uplink-downlink configuration in corresponding Downlink Control Information
The mapping relations reconfigured.
In aforesaid way 1, the TDD configured according to SIB 1 in the last one radio frames in the cycle is still kept
Signaling reconfigures DCI on the determining downlink subframe of uplink-downlink configuration and special subframe.Namely for example for the period 10,20,40,80
Millisecond is respectively in the 1st, the 2nd, the 4th and the 8th subframe.
However, also additionally the TDD uplink-downlink configuration configured according to SIB 1 in the last one radio frames is determined herein
Downlink subframe and special sub-frame division at different subframe collection, and transmission on a subframe collection reconfigures DCI phase
It should be in one-component carrier wave set.
Hereafter will be with 32 component carriers, 4 component carrier groups, each component carrier group is with other side for 8 carrier waves
Formula 1 is further elaborated.
For example, it is assumed that in the case that the uplink/downlink of TDD is configured to 0 (DSUUUDSUUU) in SIB1, due to each DCI
1C maximum can support until 8 () a component carrier reconfigures, and most 32 component carrier in eIMTA can be by
The downlink subframe for the last one radio frames on each period that is divided into 4 component carrier groups, therefore UE can be monitored and
Four subframe collection (namely D, S, D and S) of special subframe are configured to correspond respectively to first to fourth component carrier group.Namely
{ subframe#0 } is used for the first component carrier group, and { subframe#1 } is used for second component carrier wave set, and { subframe#5 } is used
In third component carrier group, and { subframe#6 } is used for the 4th component carrier group.
In addition, the subframe collection information of different component carrier groups (such as can be respectively used to multiple components via RRC signaling
The bit map signalings of multiple 10 bits of carrier wave set) it is transferred to UE.
Therefore, aforesaid way 1 is implemented based on each relevant subframe.It sends to correspond on different sub frames and divide
Measure the different DCI of carrier wave set.
Mode 2:
For the period (such as 40ms, 80ms and the following possible 120ms etc.) more than or equal to 40ms, no longer only in the period
On the last one radio frames on transmission reconfigure DCI, but can reconfiguring different component carrier groups for greater flexibility
The TDD uplink-downlink configuration configured according to SIB 1 that DCI is distributed in the different radio frames into the period determines downlink subframe and spy
Small pin for the case frame.
For example, UE is used to monitor the TDD ascending-descending subframes for obtaining first to fourth component carrier group for the period of 40ms
The DCI reconfigured can be located in the in the period the 1st, the 2nd, the 3rd and the 4th radio frames.And in these radio frames
The TDD uplink-downlink configuration configured according to SIB 1 determine and transmit relevant DCI in downlink subframe and special subframe.
Therefore, mode 2 is implemented based on each relevant radio frames.It sends to correspond in different radio frames and divide
Measure the different DCI of carrier wave set.
Scheme 2:
Fig. 2 shows according to another embodiment of the invention for the TDD to notification of user equipment dynamic change
The flow chart of the method for downstream arrangements.
As shown in Fig. 2, n component carrier is divided into m component carrier group in step s 201, and m is configured for UE
A eIMTA-RNTI, wherein the m component carrier group and the m eIMTA-RNTI are corresponded；And
Downlink subframe in the last one radio frames and special subframe in the period of TDD uplink-downlink configuration dynamic change
Above while m Downlink Control Information is sent, wherein the format of Downlink Control Information is 1C and each Downlink Control Information is distinguished
TDD uplink-downlink configuration including one-component carrier wave set reconfigures.
It can be seen that still using the L1 layer dynamic recognition signaling DCI 1C in Current standards in aforesaid way 2, however
Make the following setting different from Rel-12eIMTA:
The quantity for being allocated to the eIMTA-RNTI of a UE can be greater than 1.In addition, the quantity of eIMTA-RNTI should be corresponding
In the quantity of component carrier group.
Here, for example most 32 component carriers in eIMTA can be divided into different component carrier groups, and
Different eIMTA-RNTI is distributed into different component carrier groups to be used for the UE for supporting CA to enhance.
EIMTA-RNTI for different component carrier groups is configured to UE via RRC signaling.
Different UE may be configured to the different eIMTA-RNTI of different groups.
Therefore, in this scheme, the quantity of the eIMTA-RNTI of configuration is consistent with the quantity of component carrier group, and with two
It is corresponded between person.
Based on above-mentioned configuration, for all periods, the different DCI for different component carrier groups can be in basis
It is transmitted in the determining identical downlink subframe of TDD uplink-downlink configuration of the configuration of SIB 1 and special subframe.Specifically, such as having
In the case where there are 4 group component carrier wave sets, on a relevant downlink subframe, 4 and above-mentioned 4 component loading gage can be transmitted simultaneously
The one-to-one DCI of wave group.And for special subframe, also will so it be similarly effected.Therefore, scheme 2 can also no longer need
New time division multiplexing mode is defined for different component carrier groups, and adaptability can also be carried out for new cycle regimen 2
Configuration.
Scheme 3:
An existing DCI format is selected, length is greater than the length for the Downlink Control Information that format is 1C.For example, can
To select format for the DCI of 1A, the length is 42 bits.The DCI of above-mentioned selection will be uploaded in the public search space of main plot
It is defeated at least support it is increased support eIMTA supplementary cell TDD uplink and downlink reconfigure in a part.
Here, will also introduce a new RNTI to carry out identification and area to the DCI for the eIMTA for being used for the CA with enhancing
Not.
The program can mitigate to a certain extent while the number of reconfigurable TDD uplink-downlink configuration in a DCI
The defect of amount, and it is smaller to criteria influences.Here, it will be understood by those of skill in the art that scheme 3 can also be with scheme 1
It is combined, such as component carrier is grouped and configures suitable time multiplexed transmission mode.In view of in eMITA most
There are 32 component carriers, therefore the quantity of the supplementary cell for the eIMTA that can be reconfigured simultaneously in practice is likely less than 32 more, from
And scheme 3 is also advantageous.
Scheme 4:
A new DCI format is defined, with longer length.The length is enough to be suitable for include respectively for all
Each TDD ascending-descending subframes of component carrier reconfigure.Such as the situation of most 32 component carriers, due to each
Component carrier needs 3 bits, therefore the length of above-mentioned DCI can be 96 bits (i.e. 32*3).The program, which implements, compares appearance
Easily.
It should be noted that above-described embodiment is only exemplary, rather than limitation of the present invention.It is any without departing substantially from this hair
The technical solution of bright spirit should all be fallen under the scope of the present invention, this includes using occurring in different embodiments not
Same technical characteristic, installation method can be combined, to obtain beneficial effect.In addition, should not will be any attached in claim
Icon note is construed as limiting the claims involved；One word of " comprising " is not excluded for unlisted in other claims or specification
Device or step.
Claims (15)
1. a kind of be used to become to notification of user equipment dynamic in the base station based on carrier wave polymerization enhancing and the communication system of eIMTA
The method of the TDD uplink-downlink configuration of change, wherein being configured with n component carrier in the communication system, n is greater than 5, the method
Include:
The n component carrier is divided into m component carrier group；And
To the user equipment send m Downlink Control Information, wherein the format of the Downlink Control Information be 1C and each
Downlink Control Information respectively includes reconfiguring for the TDD uplink-downlink configuration of one-component carrier wave set.
2. the method according to claim 1, wherein further including following steps:
High-level signaling is sent to the user equipment, the high-level signaling includes the m component carrier group and the m downlink
Control information mapping relations and each component carrier in each component carrier group in corresponding Downlink Control Information
The mapping relations of TDD uplink-downlink configuration reconfigured.
3. the method according to claim 1, wherein sending institute to the user equipment in a time multiplexed manner
State m Downlink Control Information.
4. according to the method described in claim 3, it is characterized in that, in the period of the TDD uplink-downlink configuration dynamic change
The last one radio frames in downlink subframe and special subframe on send the m Downlink Control Information.
5. according to the method described in claim 4, it is characterized in that, the downlink subframe and the special sub-frame division is multiple
Subframe collection, and corresponding Downlink Control Information is sent respectively on each subframe collection.
6. according to the method described in claim 4, it is characterized in that, according to the TDD uplink-downlink configuration determination that SIB 1 is configured
Downlink subframe and the special subframe.
7. according to the method described in claim 2, it is characterized in that, the period of the TDD uplink-downlink configuration dynamic change at least
Including 10 milliseconds, 20 milliseconds, 40 milliseconds and 80 milliseconds.
8. the method according to the description of claim 7 is characterized in that the period when the TDD uplink-downlink configuration dynamic change is big
When being equal to 40 milliseconds, corresponding Downlink Control Information is sent respectively in the m radio frames in the period.
9. according to the method described in claim 8, it is characterized in that, downlink subframe in the m radio frames and especially sub
Corresponding Downlink Control Information is sent in frame, wherein what the downlink subframe and the special subframe were configured according to SIB 1
TDD uplink-downlink configuration determines.
10. the method according to claim 1, wherein n is 32, and m is 4.
11. a kind of be used for notification of user equipment dynamic in the base station based on carrier wave polymerization enhancing and the communication system of eIMTA
The method of the TDD uplink-downlink configuration of variation, wherein being configured with n component carrier in the communication system, n is greater than 5, the side
Method includes:
The n component carrier is divided into m component carrier group, and is m eIMTA-RNTI of the user device configuration,
Wherein the m component carrier group and the m eIMTA-RNTI are corresponded；And
It is same on downlink subframe in the last one radio frames and special subframe in the period of TDD uplink-downlink configuration dynamic change
When send m Downlink Control Information, wherein the format of the Downlink Control Information be 1C and each Downlink Control Information difference
TDD uplink-downlink configuration including one-component carrier wave set reconfigures.
12. according to the method for claim 11, which is characterized in that determine institute according to the TDD uplink-downlink configuration that SIB 1 is configured
State downlink subframe and the special subframe.
13. according to the method for claim 11, which is characterized in that the period of the TDD uplink-downlink configuration dynamic change is extremely
It less include 10 milliseconds, 20 milliseconds, 40 milliseconds and 80 milliseconds.
14. a kind of be used for notification of user equipment dynamic in the base station based on carrier wave polymerization enhancing and the communication system of eIMTA
The method of the TDD uplink-downlink configuration of variation, wherein being configured with n component carrier in the communication system, n is greater than 5, the side
Method includes:
A Downlink Control Information is selected, and sends the Downlink Control Information to the user equipment, wherein the downlink
The length for controlling information is greater than the length for the Downlink Control Information that format is 1C, and the Downlink Control Information includes k TDD
Uplink and downlink reconfigures, and corresponds respectively to k component carrier, wherein k≤n；Or
The first Downlink Control Information is sent to the user equipment, wherein the length of first Downlink Control Information is suitable for including
N TDD uplink and downlink reconfigures, and corresponds respectively to n component carrier.
15. according to the method for claim 14, which is characterized in that in the situation for sending first Downlink Control Information
Under, the length of first Downlink Control Information is 96 bits.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103081541A (en) * | 2010-09-01 | 2013-05-01 | 高通股份有限公司 | Power control on a deactivated component carrier |
| CN103238368A (en) * | 2010-12-03 | 2013-08-07 | 交互数字专利控股公司 | Method, apparatus and system for performing multi-radio access technology carrier aggregation |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010120142A2 (en) * | 2009-04-16 | 2010-10-21 | 엘지전자주식회사 | Apparatus and method for monitoring control channel in multi-carrier system |
| JP6006336B2 (en) * | 2012-02-03 | 2016-10-12 | インターデイジタル パテント ホールディングス インコーポレイテッド | Method and apparatus for coexistence between wireless transmit / receive units (WTRUs) operating in the same spectrum |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103081541A (en) * | 2010-09-01 | 2013-05-01 | 高通股份有限公司 | Power control on a deactivated component carrier |
| CN103238368A (en) * | 2010-12-03 | 2013-08-07 | 交互数字专利控股公司 | Method, apparatus and system for performing multi-radio access technology carrier aggregation |
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