CN102859953B - Method, receptor and conveyer for downlink control signaling - Google Patents

Abstract

Support that the functional down link control information of 3GPP Rel-10 (DCI) extension includes the minimal expansion of DCI format 2B.In certain embodiments, only two extra bits (20) are introduced into the order to support the different MU-MIMO scales of the material circumstance to order-1 and order-2 to signal up to eight by reusing scrambling identity bit (16) simultaneously.This new DCI format can the most not only be supported single subdistrict downlink transmission but also support that some other Rel-10 are functional, such as CoMP or relaying/HetNet.

Description

Method, receptor and conveyer for downlink control signaling

Technical field

The present invention relates generally to a kind of conveyer, a kind of receptor and method therein, and particularly to the downlink control signaling design to such as LTE-Advanced, the such as control Signalling Designing to LTE-A downlink delivery mode.

Background technology

UMTS(universal mobile telecommunications is serviced by third generation partner program (3GPP)) and LTE(Long Term Evolution) standardization responsible.LTE is the technology for realizing the packet-based communication of high speed, and it can reach High Data Rate in the downlink and the most all.It is considered as next generation mobile communication system relative to UMTS, LTE.In order to support High Data Rate, LTE allows up to the system bandwidth of 20MHz.LTE can also operate in different bands and can be with at least FDD(FDD) and TDD(time division duplex) operate.The transfer approach or the modulation technique that use in LTE are referred to as OFDM(OFDM).

For next generation mobile communication system, such as, IMT-advanced(international mobile telecommunication) and/or LTE-Advanced(its be the evolution of LTE), the support to up to 100MHz bandwidth is the most considered.In LTE and LTE-Advanced, radio base station is referred to as eNBs or eNodeBs, and wherein " e " represents evolution.Additionally, the multiple antennas with precoding/beam-forming technology can be used to High Data Rate is supplied to subscriber equipment.Therefore, LTE and LTE-Advanced is all MIMO(multi input, multi output) example of radio system.Another example based on MIMO and ofdm system is that WiMAX(Worldwide Interoperability for Microwave accesses interoperability).

In LTE-Advanced, such as 3GPP version 10(Rel-10) such as TechnicalSpecification36.814V1.5.0(2009-11) in specify, in order to meet the LTE-Advanced downlink peak spectrum efficiency of 30bps/Hz, use 8 × 8 senior high-order mimos that support is up to eight layers of transmission.Also being agreed in Rel-10, up to eight reference signals concrete for UE (referred to as demodulation RS or DM-RS) should be introduced into for the purpose of channel demodulation.Up to the present, there is common (normal) CP(Cyclic Prefix) DM-RS order 1-8 pattern (pattern) be determined, as shown in fig. 1.

Total of eight DM-RS port is defined, by CDM+FDM(code and frequency division multiplexing) it is re-used.DM-RS expense will be identical, i.e. 12 resource elements (RE) every layer.Up to two CDM groups are supported, FDM.Each CDM group has up to four DM-RS ports.DM-RS port numbering is defined as CDM group 1: port 7/8/11/13；And CDM group 2: port 9/10/12/14.Orthogonal covering codes (OCC) is only crossed over time domain and is defined.

Fig. 1 describes to support the DM-RS pattern that up to order eight transmits.In the case of Rel-9 layer beam is formed, i.e. downlink delivery mode eight (TM8), only CDM group 1(is represented by numeral " 1 ") used, and be CDM group 2(by digital " 2 " expression) RE that retains is used for data transmission.

Down link control information (DCI) form 2B is at 3GPPTS36.212v9.0.0(2009-12) in be defined, its disclosure is the most combined by quoting with its entirety.Dynamic order that DCI format 2B is capable of between order-1 and order-2 adapts to, and single user (SU) situation and the transparent configuration of multi-user (MU) situation, and wherein, the DM-RS port 7/8 with two scramble sequence is dynamically allocated.Fig. 2 describes to list the table 10 of different application situation, and described different application situation is impliedly indicated by some information carried in DCI format 2B.Described information by disabling/transmission block (transportblock) (TB) 12 that enables, 1-bit new data indicator (NDI) 14 and 1-bit scramble identity (SI) 16 encode.The information listed in these bits of encoded " message " row.

Summary of the invention

According to require herein and disclosed one or more embodiments, the minimal expansion of DCI format 2B is proposed, to support that Rel-10 is functional, such as, and single subdistrict MIMO, CoMP or possibly relaying/HetNet.

In the embodiment disclosed, new DCI format is proposed to support that Rel-10MIMO transmits in Rel-10.In certain embodiments, only two extra bits are introduced in DCI format (consistent with form 2B in other side (otherwise)), to support to signal the different MU-MIMO scales (dimensioning) of order-1 and order-2 material circumstance the order of up to eight by reusing SI bit 16 simultaneously.This new DCI format can the most not only support single subdistrict downlink transmission, and supports that some other Rel-10 are functional, such as, and CoMP or relaying/HetNet.

One embodiment relates to a kind of method in conveyer, for by sending the quantity carrying out the Signaling Layer used from the downlink of described conveyer transmits to receptor instruction with the message of DCI format with signal.In indicating described downlink to transmit, two bits of the described quantity of the layer of use are transmitted in described DCI format.

Another embodiment relates to a kind of method in receptor, for making described receptor can determine the quantity of the layer used in downlink transmission.Message is received with DCI format, and described DCI format includes two bits of the described quantity of marker.Described quantity according to described DCI and layer configures described receptor and receives data.

Another embodiment relates to a kind of conveyer, the quantity of its operation Signaling Layer to use from the downlink of described conveyer transmits to receptor instruction.Described conveyer includes signal sending circuit, operates to send the message with DCI format with signal, and described DCI format includes two bits indicating the quantity in described downlink transmission middle level.

Another embodiment relates to a kind of receptor, and its operation is to determine the quantity of the layer used in downlink transmission.Described receptor includes receiving circuit, and this circuit operation is to receive the message with DCI format, and described DCI format includes two bits of the quantity of marker.Described receptor also includes configuring circuit, and this circuit operation configures described receptor with the quantity according to described DCI and layer and receives data.

Accompanying drawing explanation

Fig. 1 is the FBD that prior art support is up to the DM-RS pattern that order eight transmits.

Fig. 2 is the coding describing the DCI bit according to prior art DCI format 2B and the table of the applicable cases (applicationcasessignaled) signaled.

Fig. 3 is conveyer and the FBD of receptor in cordless communication network according to an embodiment of the invention, and conveyer transmits DCI bit.

Fig. 4 is the coding describing DCI bit according to one embodiment of the invention and the table of the applicable cases signaled.

Fig. 5 is the coding describing DCI bit according to another embodiment of the present invention and the table of the applicable cases signaled.

Fig. 6 is the coding describing DCI bit according to further embodiment of this invention and the table of the applicable cases signaled.

Fig. 7 is the coding describing DCI bit according to yet another embodiment of the invention and the table of the applicable cases signaled.

Fig. 8 is to receptor instruction method flow diagram of the quantity of the Signaling Layer of use from the downlink of conveyer transmits by conveyer.

Fig. 9 is the method flow diagram of the described quantity being determined the layer used from the downlink of conveyer transmits by receptor.

Detailed description of the invention

As mentioned above, support is up to eight layers of transmission by Rel-10.TM8 will keep such as defined in Rel-9.DCI format 2B has several shortcomings, and therefore for Rel-10, new DCI format will be required.First, for supporting up to eight layers of transmission, it would be desirable to demodulate for suitable data to UE instruction order.This is the most directly specified by DCI format 2B, but implies order-1 or order-2 by the most banned being used for of TB12.Secondly, according to the MU-MIMO scale in Rel-10, order 1-2 can be applicable to SU/MU, and SU is only defined by order 3-8.This is different from Rel-9TM8, and wherein, SU and MU has the same range that up to two-layer transmits.3rd, new DCI format can be used for being used not only for single subdistrict MIMO, and is used for coordinating multiple spot (CoMP), or relaying/heterogeneous network (HetNet) possibly.Final consideration is, because Rel-9TM8 will be the subset of Rel-10 eight layers transmission, so DCI format 2B should be reused in new DCI format as much as possible.

When being applied to different application or considering, various embodiments of the present invention are presented in this article.Only part payload is depicted in this article, to describe the DCI format proposed, such as, 1-bit NDI14,1-bit SI16, disabling/other two bit 20 that represents of TB12 and A that enable and B.Other bit field for other purpose also is able to exist certainly.

Fig. 3 describes the conveyer 100 in such as radio base station, and conveyer 100 has process circuit 120, processes circuit 120 and operates to determine the quantity (based on channel quality or configuration) of layer to be used in downlink transmission.When the described quantity (that is, rank value) of layer is determined, conveyer 100 is transmitting the receptor 140 information with DCI format compatible with 3GPPRel-10 of instruction rank value being sent in such as subscriber equipment on circuit Tx.In certain embodiments, Rel-10DCI form is the extension to form 2B, and it includes two bit A for indicating rank value, B.Receptor 40 is receiving the described information with DCI format that receives on circuit Rx, and from this information, described receptor determines the described quantity of the layer used in described transmission in processing circuit 160.

Conveyer 100 includes processing circuit 120, process circuit 120 to operate to guide (direct) to transmit the circuit Tx transmission message with down link control information (DCI) form, described DCI format includes two bits (A, B) of the quantity (also referred to as transmitting order) of marker.

Receptor 140 includes receiving circuit Rx and processing circuit 160, described reception circuit Rx is configured to receive the message with DCI format, described form includes two bits of the quantity of marker, processes circuit 160 and operates and configure receptor 140 with the quantity according to down link control information and layer and receive data.

The computer program code that can pass through one or more processors (such as, the process circuit 160 processed in circuit 120 or receptor 140 in conveyer 100) and the function for performing embodiment described herein for being capable of the mechanism described herein that in radio circuit, between conveyer 100 and receptor 140, signal sends comes together to realize.Above-mentioned program code also may be provided as computer program, such as with machine readable data carrier form, described data medium carries the computer program code (when process circuit 120,160 being loaded into respectively in conveyer 100 or receptor 140) for performing the embodiment of the present invention.One this type of machine readable data carrier can be being with CD-ROM disk form.Certainly, other suitable data medium can include nonvolatile memory, disk and like this.Computer program code may be provided as the pure program code on server in addition and is downloaded to conveyer 100 or receptor 140.

SI to order signaling

The table 18 of Fig. 4 is described, and when two transmission blocks 12 are activated, only order-1 is SU/MU；Order 3-8 is only SU.In this case, according to an embodiment, by the bit A with new definition, B20 is used together 1-bit SI16 not to be used for SU situation implicitly to UE instruction rank value 3-8(because of 1-bit SI16) reduce signaling consumption.It is mixing SU/MU that order-2 transmits.In one embodiment, described 1-bit SI16 is used for separating the UE of common scheduling.In this embodiment, two new bits 20 are worth (0,0) and are used for indicating uniquely to UE the rank value of 2.Fig. 4 describes said two bit 20 and a representational coding of described 1-bit SI16；Other coding is within the scope of the invention.

SI to MU-MIMO scale

For above-described embodiment further, new bit 20 also is able to be effectively used to order 1-2, with the SU/MU situation more complicated to Rel-10UE instruction, such as, DM-RS port or the instruction of CDM group.Three SU/MU applicable cases are considered.

First situation (two of which DM-RS port is signaled by two scramble sequence) is depicted in the table 22 of Fig. 5.It is noted that the one or five row is identical with DCI format 2B, wherein 1-bit SI16 is used for the port 7/8 signaling in CDM-1.In this case, two new bits 20 are not used in order-1, and retained.Fig. 5 describes to signal a representational coding of two bits 20 and 1-bit SI16 of order 3-8；Other coding is within the scope of the invention.

Second situation (four DM-RS ports in two of which CDM group are signaled by a scramble sequence) is depicted in the table 24 of Fig. 6.In this case, the port 9/10 in port 7/8 and CDM-2 in CDM-1 is used, and wherein length-2OCC will be employed.In one embodiment, 1-bit SI16 can be used for signaling described port by order 1/2 message in the 10th row.In another embodiment, described port is by using new bit 20 to signal.Because distribute the UE of common scheduling with orthogonal port, so the common scheduling of Rel-9 and Rel-10UE can be activated, even by identical scramble sequence.Therefore, 1-bit SI16 is idle, and can be used for the signaling of described port, because other separation is no longer required between the UE of scheduling altogether.So, the use of scramble sequence is limited.In another embodiment, the A-bit of new bit 20 or B-bit can be utilized and carry out the thing identical with 1-bit SI16, to release the restriction of (release) scramble sequence.Fig. 6 describes a representational coding of two bits 20 and 1-bit SI16；Other coding is within the scope of the invention.

3rd situation (wherein four DM-RS ports in CDM group one are signaled by a scramble sequence) is depicted in the table 26 of Fig. 7.In this case, the port 7/8/11/13 in CDM-1 is used, and wherein length-4OCC will be employed.In one embodiment, 1-bit SI16 can be used for signaling OCC length by order 1/2 message in the 10th row.Table 26 is identical with the table 24 of Fig. 6, but has the different explanations reusing 1-bit SI16.In another embodiment, the A-bit of new bit 20 or B-bit can be utilized and carry out the thing identical with 1-bit SI16, to release the restriction of scramble sequence.Fig. 6 describes a representational coding of two bits 20 and 1-bit SI16；Other coding is within the scope of the invention.

Fig. 8 describes Signaling Layer information to be sent to the method 200 of receptor by the conveyer in the cordless communication network of such as eNB.Described conveyer determines the quantity (block 210) of Signaling Layer to be used in downlink transmission, and then will include that the DCI format of two bits 20 of the described quantity of the layer indicating described downlink to use in transmitting is sent to receptor (block 220).In various embodiments, as described above, said two bit 20 can be jointly coded together with existing DCI format 2B bit (such as SI16), to pass on the various information in addition to described Signaling Layer information.

Fig. 9 describes to be received the method 300 of Signaling Layer information by the receptor in the cordless communication network of such as UE.Described receptor receives the message with DCI format, described DCI format includes two bit 20(blocks 310 of the quantity of Signaling Layer in the transmission of indicating downlink link), and then configure acceptor circuit Rx reception data (block 320) according to the described quantity of described DCI and layer.In various embodiments, as described above, two bits 20 can be jointly coded together with existing DCI format 2B bit (such as SI16), to pass on the various information in addition to described Signaling Layer information.

To the extension signaling other situation

It is noted that in the above embodiments, in some cases, such as, order-1, two new bits 20 are retained.In one embodiment, in such cases, two new bits 20 can be utilized to signal other application scenarios, particularly mainly for those situations of (target) order-1.This type of situation includes (as example and do not limit) single subdistrict MU-MIMO, CoMP or relaying/HetNet.Any coding (it can be by those skilled in the art to being specifically used for easily planning (devise)) of the bit of the reservation according to the benefit with disclosure teaching, whether no matter downlink transmits is implemented (conduct) in a situation of these situations, and signaling information can be communicated to UE.

According to above-described embodiment, transmit with support Rel-10MIMO based on DCI format 2B and two new bits 20 of use, the new DCI format of Rel-10 is presented many advantages.First, more than two-layer (it practice, up to eight layers) rank value can by use existing 1-bit SI16 and only introducing two new bits 20 combined coding impliedly indicate.Standard DCI format 2B can be reused in the degree of maximum possible.Secondly, for the support of different MU-MIMO scales, 1-bit SI16 can be reused to be effectively saved control signaling as much as possible, and still allows for the instruction of the scrambling to order-1 and the material circumstance of order-2.Finally, it is proposed that Rel-10DCI form can separate SU and MU application, and it is functional to can be used for other possible Rel-10 in order-1 situation, such as CoMP, relaying and HetNet.

Certainly, the present invention can carry out in the case of without departing from the necessary characteristic of this invention in the alternate manner different from those modes the most specifically stated.The embodiment presented is intended to be considered as illustrative and non-limiting in every respect, and all changes in the meaning of appended claims and equivalency range are intended to be included in wherein.

Claims (28)

1. the method (200) that a kind is performed by conveyer (100), for by transmitting to indicate, to receptor (140), the transmission rank value used from the downlink of described conveyer (100) transmits with the message of down link control information DCI format, wherein said DCI format includes 1-bit new data indicator NDI(14), 1-bit scramble identity SI(16) and disabling or the transmission block TB(12 that enables), and the method comprise the steps that

In described DCI format, transmitting (210) and described 1-bit SI(16) combined coding to be impliedly to indicate two added bits (20) of the transmission rank value of 3-8.

2. the method for claim 1, wherein, described DCI format based on DCI format 2B as defined in 3GPPTS36.212v9.0.0, be modified to support that 8 × 8 multiple-input and multiple-output MIMO transmit, and wherein said amendment includes the interpolation of said two added bit (20) of DCI format 2B.

3. method as claimed in claim 2, wherein, described 1-bit SI(16) it is used for different multi-user's MU-MIMO scales.

4. method as claimed in claim 2, wherein, four demodulated reference signal ports in two code division multiplexing groups pass through 1-bit SI(16) and 1-bit NDI(14) or by any one in two added bits (20) and 1-bit NDI(14) or by 1-bit SI(16) or signaled by any one in two added bits (20).

5. method as claimed in claim 4, wherein, the port 9 and 10 in port in a code division multiplexing group 7 and 8 and another code division multiplexing group is used.

6. method as claimed in claim 5, wherein, for order-1 message, uses described 1-bit SI(16) and 1-bit NDI(14) signal described port, for order-2 message, use described 1-bit SI(16) signal described port.

7. method as claimed in claim 5, wherein, for order-1 message, use any one in said two added bit (20) and 1-bit NDI(14) signal described port, use any one bit in said two added bit (20) to signal described port for order-2 message.

8. method as claimed in claim 2, wherein, four demodulated reference signal ports in a code division multiplexing group pass through 1-bit SI(16) and 1-bit NDI(14) or by any one in two added bits (20) and 1-bit NDI(14) or by 1-bit SI(16) or signaled by any one in two added bits (20).

9. method as claimed in claim 8, wherein, the port 7,8,11 and 13 in a code division multiplexing group is used, and wherein length-4 orthogonal covering codes is employed.

10. method as claimed in claim 9, wherein, for order-1 message, uses described 1-bit SI(16) and 1-bit NDI(14) signal described port, for order-2 message, use described 1-bit SI(16) signal described port.

11. methods as claimed in claim 9, wherein, for order-1 message, use any one in said two added bit (20) and 1-bit NDI(14) signal described port, use any one bit in said two added bit (20) to signal described port for order-2 message.

12. the method for claim 1, wherein said two added bit (20) be used for signaling other and transmit situation, including single subdistrict MU-MIMO, CoMP or relaying/HetNet.

13. methods as claimed in claim 12, wherein, described other transmits situation and selects from the group being made up of single subdistrict multi-user multiple-input and multiple-output MU-MIMO, coordination multiple spot CoMP and relaying/heterogeneous network HetNet.

The method (300) that 14. 1 kinds are performed by receptor (140), is used for so that described receptor (140) can determine the transmission rank value that downlink uses in transmitting, and described method includes:

Receive (310) message with down link control information DCI format, described DCI format includes 1-bit new data indicator NDI(14), 1-bit scramble identity SI(16) and disabling or the transmission block TB(12 that enables) and with described 1-bit SI(16) combined coding impliedly to indicate two bits (20) of the transmission rank value of 3-8, and

Configure (320) described receptor (140) according to described DCI format and indicated transmission rank value and receive data.

15. 1 kinds of conveyers (100), operate the transmission rank value to use from the downlink of described conveyer (100) transmits to receptor (140) instruction, including:

Process circuit (120), operate to guide the message transmitting circuit Tx transmission with down link control information DCI format, wherein said DCI format includes 1-bit new data indicator NDI(14), 1-bit scramble identity SI(16) and disabling or the transmission block TB(12 that enables), described DCI format includes two added bits (20), and described 1-bit SI(16) and said two added bit (20) be jointly encoded impliedly to indicate the transmission rank value of 3-8.

16. conveyers (100) as claimed in claim 15, wherein, described DCI format based on DCI format 2B as defined in 3GPPTS36.212v9.0.0, be modified to support that 8 × 8 multiple-input and multiple-output MIMO transmit, and wherein said amendment includes the interpolation of said two added bit (20) of DCI format 2B.

17. conveyers (100) as claimed in claim 16, wherein, described conveyer (100) is configured to described 1-bit SI(16) for different multi-user's MU-MIMO scales.

18. conveyers (100) as claimed in claim 16, wherein, described conveyer (100) is configured through 1-bit SI(16) and 1-bit NDI(14) or by any one in two added bits (20) and 1-bit NDI(14) or by 1-bit SI(16) or signal four demodulated reference signal ports in two code division multiplexing groups by any one in two added bits (20).

19. conveyers (100) as claimed in claim 18, wherein, the port 9 and 10 in port that described conveyer (100) is configured to use in a code division multiplexing group 7 and 8 and another code division multiplexing group.

20. conveyers (100) as claimed in claim 19, wherein, described conveyer (100) is configured to for order-1 message, use described 1-bit SI(16) and 1-bit NDI(14) signal described port, for order-2 message, use described 1-bit SI(16) signal described port.

21. conveyers (100) as claimed in claim 19, wherein, described conveyer (100) is configured to for order-1 message, use any one in said two added bit (20) and 1-bit NDI(14) signal described port, use any one bit in said two added bit (20) to signal described port for order-2 message.

22. conveyers (100) as claimed in claim 16, wherein, described conveyer (100) is configured through 1-bit SI(16) and 1-bit NDI(14) or by any one in two added bits (20) and 1-bit NDI(14) or by 1-bit SI(16) or signal four demodulated reference signal ports in a code division multiplexing group by any one in two added bits (20).

23. conveyers (100) as claimed in claim 22, wherein, described conveyer (100) is configured to the port 7,8,11 and 13 used in a code division multiplexing group, and application length-4 orthogonal covering codes.

24. conveyers (100) as claimed in claim 23, wherein, described conveyer (100) is configured to for order-1 message, use described 1-bit SI(16) and 1-bit NDI(14) signal described port, for order-2 message, use described 1-bit SI(16) signal described port.

25. conveyers (100) as claimed in claim 23, wherein, described conveyer (100) is configured to for order-1 message, use any one in said two added bit (20) and 1-bit NDI(14) signal described port, use any one bit in said two added bit (20) to signal described port for order-2 message.

26. conveyers (100) as claimed in claim 15, wherein, described conveyer (100) is configured to that said two added bit (20) is also used for signal other and transmits situation, including single subdistrict MU-MIMO, CoMP or relaying/HetNet.

27. conveyers (100) as claimed in claim 26, wherein, described other transmits situation and selects from the group being made up of single subdistrict multi-user multiple-input and multiple-output MU-MIMO, coordination multiple spot CoMP and relaying/heterogeneous network HetNet.

28. 1 kinds of receptors (140), operate to determine the transmission rank value that downlink uses in transmitting, and described receptor includes:

Receive circuit Rx, operate to receive the message with down link control information DCI format, described DCI format includes 1-bit new data indicator NDI(14), 1-bit scramble identity SI(16) and disabling or the transmission block TB(12 that enables) and with described 1-bit SI(16) combined coding impliedly to indicate two added bits (20) of the transmission rank value of 3-8, and

Process circuit (160), operate to configure described receptor (140) reception data according to described DCI format and indicated transmission rank value.