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 PDF

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Publication number
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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control information
component carrier
downlink control
tdd
configuration
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CN105992349B (en
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孙芳蕾
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Nokia Shanghai Bell Co Ltd
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Alcatel Lucent Shanghai Bell Co Ltd
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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

A kind of for notifying the method for TDD uplink-downlink configuration dynamically changed
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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US20130201884A1 (en) * 2012-02-03 2013-08-08 Interdigital Patent Holdings, Inc. Method and apparatus for coexistence among wireless transmit/receive units (wtrus) operating in the same spectrum

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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
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