CN105992349A - Method of informing of dynamically changing TDD uplink and downlink configuration - Google Patents
Method of informing of dynamically changing TDD uplink and downlink configuration Download PDFInfo
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- CN105992349A CN105992349A CN201510051299.8A CN201510051299A CN105992349A CN 105992349 A CN105992349 A CN 105992349A CN 201510051299 A CN201510051299 A CN 201510051299A CN 105992349 A CN105992349 A CN 105992349A
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Abstract
The invention provides a method of informing of dynamically changing TDD uplink and downlink configuration. According to one embodiment of the invention, a method of informing user equipment of dynamically changing TDD uplink and downlink configuration in a base station of a communication system based on carrier aggregation enhancement and eIMTA (Enhanced Interference Management with Traffic Adaption) is put forward, wherein n component carriers are configured in the communication system, and n is greater than 5. The method comprises the steps of dividing the n component carriers into m component carrier groups, and sending m pieces of downlink control information to the user equipment, wherein the format of the downlink control information is 1c, and each piece of downlink control information includes reconfiguration of TDD uplink and downlink configuration of one component carrier group. The method can support eIMTA under the condition of CA enhancement of more than five component carriers.
Description
Technical field
The present invention relates to mobile communication technology, particularly relate to a kind of poly-for strengthening carrier wave at LTE
The method closing the TDD uplink-downlink configuration dynamically changed that sends a notice.
Background technology
In RAN#66 meeting, have approved the LTE carrier aggregation of more than 5 component carriers
The job scheme that (carrier aggregation, CA) strengthens.Meanwhile, in the recent period by LTE
The licensed band of exempting from extending to 5GHz band alleviating distention in middle-JIAO has obtained great attention rate.Except the widest
General outside the bandwidth of LTE, in other bandwidth (such as 3.5GHz), this distribution
More than one carrier wave can also be realized in a frequency range.Additionally, RAN4 is at relevant CA
The standard aspect (the most in the downstream direction) of demand make good progress.Multiple 3-DL CA work
Project is complete, and multiple 4-DL CA configures under discussion.As described above, exceed
The CA of 5 carrier waves strengthens the chance that offer effectively utilizes available frequency band, thus meets logical
Letter needs.
In Rel-12eIMTA, reach an agreement on for supporting eIMTA (Enhanced
Interference Management with Traffic Adaption, namely TDD up-downgoing is dynamic
Configuration) the new RNTI of subscriber equipment (user equipment, UE), and form is
The Downlink Control Information (downlink control information, DCI) of 1C.This DCI
TDD uplink/downlink configuration by the dynamically change of notice eIMTA component carrier.This heavy
Configuration DCI will at least carry 3 bits and having to explicitly indicate existing 7 kinds of uplink/downlinks configuration
In one.Dominant public the searching reconfiguring the DCI PDCCH at least one main plot
Rope space is transmitted.If DCI transmits in the public search space of the PDCCH of main plot,
Then for two or more designators of the community of the most two or more support eIMTA
(being each 3 bits) can be included in one and dominant reconfigure in DCI, and it will be by
It is sent to be configured with the UE of the community of two or more support eIMTA.Further, will be via height
Layer signaling is informed and is supported reflecting between the community of eIMTA and the uplink/downlink configuration of 3 bits
Penetrate relation.
Strengthen more than 5 component carriers when, for eIMTA, original
The DCI that form is 1C may be not enough to support until the assisted cell of 32 eMITA.
Because the configuration of each TDD uplink/downlink is 3 bits, thus reconfigurable support eMITA
The quantity of assisted cell beHere, Lformat1cLoad equal to form 1C
(26 bit), therefore form is that the DCI of 1C will only support 8 component carriers, namely 8
Individual assisted cell.Obviously, this is far from being enough.Therefore, in the present invention, one will be proposed
A little modes, it is for improving for the eIMTA in the case of strengthening more than the CA of 5 carrier waves
TDD uplink/downlink configuration reconfigure.
Summary of the invention
In order to solve above-mentioned technical problem, according to the first aspect of the invention, it is proposed that a kind of at base
Strengthen in carrier aggregation and be used for moving to notification of user equipment in the base station of the communication system of eIMTA
The method of the TDD uplink-downlink configuration of state change, is wherein configured with n in described communication system
Component carrier, n is more than 5, and described method includes: described n component carrier is divided into m
Component carrier group;And to described subscriber equipment send m Downlink Control Information, wherein said under
The form of row control information is 1C and each Downlink Control Information includes one-component carrier wave respectively
Reconfiguring of the TDD uplink-downlink configuration of group.
Preferably, sending high-level signaling to described subscriber equipment, described high-level signaling includes described m
Individual component carrier group and the mapping relations of described m Downlink Control Information, and each component carrier
The weight of each component carrier in group and the TDD uplink-downlink configuration in corresponding Downlink Control Information
The mapping relations of configuration.
Preferably, under described subscriber equipment transmission described m, letter is controlled in a time multiplexed manner
Breath.
Preferably, last nothing in the cycle that described TDD uplink-downlink configuration dynamically changes
Described m Downlink Control Information is sent on descending sub frame in line frame and special subframe.
Preferably, by described descending sub frame and described special sub-frame division multiple subframe collection, and
Corresponding Downlink Control Information is sent respectively on each subframe collection.
Preferably, described descending sub frame and institute are determined according to the TDD uplink-downlink configuration of SIB 1 configuration
State special subframe.
Preferably, the cycle that described TDD uplink-downlink configuration dynamically changes at least include 10 milliseconds,
20 milliseconds, 40 milliseconds and 80 milliseconds.
Preferably, when the cycle that described TDD uplink-downlink configuration dynamically changes is more than or equal to 40 milliseconds
Time, m radio frames in the described cycle sends corresponding Downlink Control Information respectively.
Preferably, n is 32, and m is 4.
According to the second aspect of the invention, it is proposed that a kind of based on carrier aggregation enhancing and eIMTA
Communication system base station in for the TDD uplink-downlink configuration that dynamically changes to notification of user equipment
Method, in described communication system, be wherein configured with n component carrier, n be more than 5, described
Method includes: described n component carrier is divided into m component carrier group, and is described use
Family equipment m eIMTA-RNTI of configuration, wherein said m component carrier group is individual with described m
EIMTA-RNTI one_to_one corresponding;And in the cycle that TDD uplink-downlink configuration dynamically changes
Send m Downlink Control Information on descending sub frame in later radio frames and special subframe simultaneously,
The form of wherein said Downlink Control Information is 1C and each Downlink Control Information includes one respectively
Reconfiguring of the TDD uplink-downlink configuration of individual component carrier group.
According to the third aspect of the invention we, it is proposed that a kind of based on carrier aggregation enhancing and eIMTA
Communication system base station in for the TDD uplink-downlink configuration that dynamically changes to notification of user equipment
Method, in described communication system, be wherein configured with n component carrier, n be more than 5, described
Method includes: selects a Downlink Control Information, and sends described descending to described subscriber equipment
Control information, the length of wherein said Downlink Control Information is more than the descending control letter that form is 1C
The length of breath, and described Downlink Control Information includes that k TDD up-downgoing reconfigures, its point
Dui Yingyu k component carrier, wherein k≤n;Or send the first descending control to described subscriber equipment
Information processed, the length of wherein said first Downlink Control Information is suitable to include n TDD up-downgoing
Reconfiguring, it corresponds respectively to n component carrier.
Preferably, when sending described first Downlink Control Information, described first descending control
A length of 96 bits of information processed.
In the present invention, it is proposed that a kind of new signaling solution, it can be supported more than 5
The eIMTA when CA of component carrier strengthens.
Accompanying drawing explanation
The detailed description that non-limiting example is made made with reference to the following drawings by reading,
The other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows according to an embodiment of the invention for dynamically becoming to notification of user equipment
The flow chart of the method for the TDD uplink-downlink configuration changed;And
Fig. 2 show according to another embodiment of the invention for dynamic to notification of user equipment
The flow chart of the method for the TDD uplink-downlink configuration of change.
In the drawings, running through different diagrams, same or similar reference represents identical or relative
The parts answered or feature.
Detailed description of the invention
Before introducing the present invention, first will introduce some and the L1 of agreement in Rel-12
The content that dynamic recognition DCI of layer is relevant.
The quantity of the eIMTA-RNTI being allocated to a UE is 1.
-carry out UE by RRC signaling and specifically configure eIMTA-RNTI;
-different UE can be configured different eIMTA-RNTI.
The cycle reconfiguring DCI at least may include that 10ms, 20ms, 40ms and 80ms.
Carry out UE by RRC signaling and specifically configure the mapping reconfiguring between DCI and community
Relation.
Carrying out UE by RRC signaling and specifically configure subframe collection, UE monitors these subframe collection
Obtain and dominant reconfigure DCI.
UE may use for monitor obtain reconfigure the subframe collection of DCI based on:
-for cycle of 10ms, subframe collection is descending sub frame and the spy of SIB1 message arrangement
Stator frame.
-for cycle of 20ms, subframe collection is in second radio frames in the cycle
The descending sub frame of SIB1 message arrangement and specific sub-frame.
-for cycle of 40ms, subframe collection is in the 4th radio frames in the cycle
The descending sub frame of SIB1 message arrangement and specific sub-frame.
-for cycle of 80ms, subframe collection is the SIB1 in the 8th radio frames in the cycle
The descending sub frame of message arrangement and specific sub-frame.
Being FDD for being configured with main plot, the UE of eIMTA, 10 ratios are supported in assisted cell
Special bit map is used for that the subframe collection in the n-th subframe is configured to monitor L1 layer and heavily joins
Putting DCI, wherein n is the cycle (in units of radio frames) reconfiguring DCI of monitoring L1 layer.
Based on above-mentioned agreement, the present invention will strengthen more than the CA of 5 component carriers for having
EIMTA propose strengthen reconfigure DCI.
Scheme 1: still use the dynamic recognition signaling format DCI 1C of current L1 layer also
And think that following agreement is the most effective.
The quantity of the eIMTA-RNTI being allocated to a UE is 1
-carry out UE by RRC signaling and specifically configure eIMTA-RNTI;
-different UE can be configured different eIMTA-RNTI.
If the quantity of component carrier is more than 5, then component carrier is divided into different components and carries
Ripple group, and would correspond to via the DCI that multiple forms are 1C in a time multiplexed manner
The TDD ascending-descending subframes of different component carrier groups reconfigures and is sent to UE.
Here, the TDD uplink-downlink configuration configured according to SIB 1 is determined above-mentioned descending sub frame and
Subframe especially
Furthermore it is possible to notify that each component carrier group with multiple forms is via high-level signaling
Each component carrier in the mapping relations of the DCI of 1C, and each component carrier group and phase
The mapping relations reconfigured of the TDD uplink-downlink configuration in the Downlink Control Information answered.For
Different component carrier groups, they such as can have and the week of restriction in Rel-12eIMTA
The cycle that phase is identical, i.e. 10,20,40 and 80ms.Certainly, they can also have such as
The cycle of 120ms.
Time division multiplexing mode is embodied as, such as can be at any frame in the cycle
DCI can be transmitted in the descending and special subframe of any SIB1 instruction.Preferably, it is possible to
Consideration following manner:
Mode 1:
Fig. 1 shows according to an embodiment of the invention for moving to notification of user equipment
The flow chart of the method for the TDD uplink-downlink configuration of state change.
As it is shown in figure 1, in step S101, first n component carrier is divided into m
Individual component carrier group.
In step s 102, last in the cycle that TDD uplink-downlink configuration dynamically changes
M descending control is sent to UE respectively on descending sub frame in one radio frames and special subframe
Information.
Specifically, at this also by multiple to descending sub frame and special sub-frame division different subframe collection,
And on each subframe collection, send corresponding Downlink Control Information to UE respectively.Under here,
The form of row control information is 1C and each Downlink Control Information includes that one-component carries respectively
Reconfiguring of the TDD uplink-downlink configuration of ripple group.
Additionally, also will send high-level signaling to UE, it includes m component carrier group and m
Each component carrier in the mapping relations of individual Downlink Control Information and each component carrier group
The mapping relations reconfigured with the TDD uplink-downlink configuration in corresponding Downlink Control Information.
In aforesaid way 1, remain on the root in last radio frames in the cycle
Signaling on the descending sub frame determined according to the TDD uplink-downlink configuration of SIB 1 configuration and special subframe
Reconfigure DCI.Namely such as the cycle 10,20,40,80 milliseconds respectively the 1st,
In 2nd, the 4th and the 8th subframe.
But, at this most additionally by configuring according to SIB 1 in last radio frames
The descending sub frame that TDD uplink-downlink configuration determines becomes different subframe collection with special sub-frame division, and
And the transmission on a subframe collection reconfigure DCI corresponding to one-component carrier wave set.
Hereafter will be with 32 component carriers, 4 component carrier groups, each component carrier group has
As a example by having 8 carrier waves, mode 1 is further elaborated.
For example, it is assumed that the uplink/downlink of TDD is configured to 0 (DSUUUDSUUU) in SIB1
In the case of, due to each DCI 1C can maximum support until 8 () individual component carrier
Reconfigure, and the component carrier of most 32 in eIMTA can be divided into 4 components and carry
Ripple group, therefore, it is possible to the descending son of last radio frames on each cycle that UE is monitored
Four subframe collection (namely D, S, D and S) of frame and 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,
{ subframe#1} is used for second component carrier wave set, and { subframe#5} carries for three-component
Ripple group, and { subframe#6} is used for the 4th component carrier group.
Additionally, the subframe collection information of different component carrier groups can be via RRC signaling (example
As being respectively used to the bit map signaling of multiple 10 bits of multiple component carrier group) passed
Transport to UE.
Therefore, aforesaid way 1 is to implement based on each relevant subframe.Different
The different DCI corresponding to component carrier group is sent in subframe.
Mode 2:
For the cycle more than or equal to 40ms, (such as 40ms, 80ms and future are possible
120ms etc.), the most only transmit in the radio frames of last on the cycle and reconfigure DCI,
But can for greater flexibility the DCI that reconfigures of different component carrier groups be distributed to the cycle
Different radio frames according to SIB 1 configuration TDD uplink-downlink configuration determine descending son
Frame and special subframe.
Such as, for the cycle of 40ms, UE is used for monitoring acquisition first to fourth component and carries
The DCI that the TDD ascending-descending subframes of ripple group reconfigures can lay respectively at the 1st in the cycle,
In 2nd, the 3rd and the 4th radio frames.And joining according to SIB 1 in these radio frames
The TDD uplink-downlink configuration put determines transmits relevant DCI in descending sub frame and special subframe.
Therefore, mode 2 is to implement based on each relevant radio frames.In different nothings
The different DCI corresponding to component carrier group is sent on line frame.
Scheme 2:
Fig. 2 show according to another embodiment of the invention for notification of user equipment
The dynamically flow chart of the method for the TDD uplink-downlink configuration of change.
As in figure 2 it is shown, in step s 201 n component carrier is divided into m component
Carrier wave set, and configure m eIMTA-RNTI, wherein said m component carrier for UE
Group and described m eIMTA-RNTI one_to_one corresponding;And
Under in last radio frames in the cycle that TDD uplink-downlink configuration dynamically changes
Send m Downlink Control Information, wherein Downlink Control Information in row subframe and special subframe simultaneously
Form be the TDD that 1C and each Downlink Control Information include one-component carrier wave set respectively
Reconfiguring of uplink-downlink configuration.
As can be seen here, the L1 layer in Current standards is still used the most heavily to join in aforesaid way 2
Confidence makes DCI 1C, but has made the following setting being different from Rel-12eIMTA:
The quantity of the eIMTA-RNTI being allocated to a UE can be more than 1.Additionally,
The quantity of eIMTA-RNTI should be corresponding to the quantity of component carrier group.
-here, such as most 32 component carriers in eIMTA can be divided into not
Same component carrier group, and different eIMTA-RNTI is distributed to different component carriers
The UE that group strengthens for supporting CA.
-be configured via RRC signaling for the eIMTA-RNTI of different component carrier groups
To UE.
-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 and component carrier group
Quantity consistent, and with one_to_one corresponding between the two.
Based on above-mentioned configuration, for all of cycle, for different component carrier groups not
With DCI can the TDD uplink-downlink configuration configured according to SIB 1 determine identical under
Transmit in row subframe and special subframe.Specifically, such as in the feelings with 4 group component carrier wave set
Under condition, on a relevant descending sub frame, 4 and above-mentioned 4 group components can be transmitted simultaneously
Carrier wave set DCI one to one.And for special subframe, also will so be similarly effected.Cause
This, scheme 2 can also be no longer necessary to define new time division multiplex side into different component carrier groups
Formula, and adaptive configuration can also be carried out for new cycle regimen 2.
Scheme 3:
Selecting an existing DCI format, its length is more than the descending control that form is 1C
The length of information.For example, it is possible to selecting form is the DCI of 1A, its a length of 42 bits.
The DCI of above-mentioned selection will transmit so that supporting less to increase on the public search space of main plot
The TDD up-downgoing of assisted cell of support eIMTA reconfigure in a part.
Here, be also introduced into a new RNTI to the CA's for having enhancing
The DCI of eIMTA is identified and distinguishes.
The program can alleviate the most reconfigurable in a DCI to a certain extent
The defect of the quantity of TDD uplink-downlink configuration, and less to criteria influences.Here, this area
It will be appreciated by the skilled person that scheme 3 can also be combined with scheme 1, such as to component
Carrier wave carries out being grouped and configure applicable time multiplexed transmission mode.In view of in eMITA
Be up to 32 component carriers, the auxiliary of the eIMTA that can simultaneously reconfigure the most in practice
The quantity of community is likely less than 32, thus scheme 3 is also advantageous.
Scheme 4:
Defining a new DCI format, it has longer length.This length be enough to be suitable to
Reconfigure including each TDD ascending-descending subframes being respectively directed to all of component carrier.Such as
For the situation of most 32 component carriers, owing to each component carrier needs 3 bits,
The length of the most above-mentioned DCI can be 96 bits (i.e. 32*3).The program implements ratio
It is easier to.
It should be noted that above-described embodiment is only exemplary, rather than the limit to the present invention
System.Any technical scheme without departing substantially from spirit of the present invention all should fall into protection scope of the present invention it
In, this includes using the different technologies feature occurred in different embodiments, and installation method is permissible
It is combined, to obtain beneficial effect.Additionally, should be by any accompanying drawing mark in claim
Note is considered as limiting involved claim;" include " word be not excluded for other claim or
Device unlisted in description or step.
Claims (15)
1. one kind based on carrier aggregation strengthen and eIMTA communication system base station in for
The method of the TDD uplink-downlink configuration that notification of user equipment dynamically changes, wherein in described communication system
Being configured with n component carrier in system, n is more than 5, and described method includes:
Described n component carrier is divided into m component carrier group;And
M Downlink Control Information is sent to described subscriber equipment, wherein said Downlink Control Information
Form is 1C and each Downlink Control Information includes that the TDD of one-component carrier wave set is upper and lower respectively
Reconfiguring of row configuration.
Method the most according to claim 1, it is characterised in that also comprise the steps:
Sending high-level signaling to described subscriber equipment, described high-level signaling includes that described m component carries
The mapping relations of ripple group and described m Downlink Control Information, and every in each component carrier group
Individual component carrier and the TDD uplink-downlink configuration in corresponding Downlink Control Information reconfigure reflect
Penetrate relation.
Method the most according to claim 1, it is characterised in that in a time multiplexed manner to
Described subscriber equipment sends and controls information under described m.
Method the most according to claim 3, it is characterised in that in described TDD up-downgoing
Configure in the descending sub frame in last radio frames in the cycle of dynamically change and special subframe
Send described m Downlink Control Information.
Method the most according to claim 4, it is characterised in that by described descending sub frame and institute
State special sub-frame division multiple subframe collection, and send the most descending on each subframe collection respectively
Control information.
Method the most according to claim 4, it is characterised in that according to the TDD of SIB 1 configuration
Uplink-downlink configuration determines described descending sub frame and described special subframe.
Method the most according to claim 2, it is characterised in that described TDD up-downgoing is joined
The cycle putting dynamically change at least includes 10 milliseconds, 20 milliseconds, 40 milliseconds and 80 milliseconds.
Method the most according to claim 7, it is characterised in that when described TDD up-downgoing
When the cycle of configuration dynamically change is more than or equal to 40 milliseconds, m radio frames in the described cycle
Middle send corresponding Downlink Control Information respectively.
Method the most according to claim 8, it is characterised in that in described m radio frames
In descending sub frame and special subframe in send corresponding Downlink Control Information, wherein said under
The TDD uplink-downlink configuration that row subframe and described special subframe configure according to SIB 1 determines.
Method the most according to claim 1, it is characterised in that n is 32, and m is 4.
11. 1 kinds are used in the base station of communication system based on carrier aggregation enhancing and eIMTA
To the method for the TDD uplink-downlink configuration that notification of user equipment dynamically changes, wherein in described communication
Being configured with n component carrier in system, n is more than 5, and described method includes:
Described n component carrier is divided into m component carrier group, and is described subscriber equipment
Configuring m eIMTA-RNTI, wherein said m component carrier group is individual with described m
EIMTA-RNTI one_to_one corresponding;And
Descending in last radio frames in the cycle that TDD uplink-downlink configuration dynamically changes
Send m Downlink Control Information, wherein said Downlink Control Information in subframe and special subframe simultaneously
Form be 1C and each Downlink Control Information includes on the TDD of one-component carrier wave set respectively
Reconfiguring of downstream arrangements.
12. methods according to claim 11, it is characterised in that according to SIB 1 configuration
TDD uplink-downlink configuration determines described descending sub frame and described special subframe.
13. methods according to claim 11, it is characterised in that described TDD up-downgoing
The cycle of configuration dynamically change at least includes 10 milliseconds, 20 milliseconds, 40 milliseconds and 80 milliseconds.
14. 1 kinds are used in the base station of communication system based on carrier aggregation enhancing and eIMTA
To the method for the TDD uplink-downlink configuration that notification of user equipment dynamically changes, wherein in described communication
Being configured with n component carrier in system, n is more than 5, and described method includes:
Select a Downlink Control Information, and send described descending control letter to described subscriber equipment
Breath, the length of wherein said Downlink Control Information is more than the length of the Downlink Control Information that form is 1C
Spending, and described Downlink Control Information includes that k TDD up-downgoing reconfigures, it is the most corresponding
In k component carrier, wherein k≤n;Or
Sending the first Downlink Control Information to described subscriber equipment, wherein said first descending control is believed
The length of breath is suitable to include that n TDD up-downgoing reconfigures, and it corresponds respectively to n component and carries
Ripple.
15. methods according to claim 14, it is characterised in that sending described first time
When row control information, a length of 96 bits of described first Downlink Control Information.
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US20120039180A1 (en) * | 2009-04-16 | 2012-02-16 | Lg Electronics Inc. | Apparatus and method for monitoring control channel in multi-carrier system |
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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