WO2017070942A1 - 下行控制信息的传输方法、装置以及通信系统 - Google Patents
下行控制信息的传输方法、装置以及通信系统 Download PDFInfo
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- WO2017070942A1 WO2017070942A1 PCT/CN2015/093377 CN2015093377W WO2017070942A1 WO 2017070942 A1 WO2017070942 A1 WO 2017070942A1 CN 2015093377 W CN2015093377 W CN 2015093377W WO 2017070942 A1 WO2017070942 A1 WO 2017070942A1
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- control information
- user equipment
- downlink control
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- 238000005516 engineering process Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 230000006399 behavior Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/18—Information format or content conversion, e.g. adaptation by the network of the transmitted or received information for the purpose of wireless delivery to users or terminals
Definitions
- the present invention relates to the field of communications technologies, and in particular, to a downlink control information (DCI, Downlink Control Information) transmission method, apparatus, and communication system.
- DCI Downlink Control Information
- LTE Long Term Evolution
- LTE-A Long Term Evolution Advanced
- IoT Internet of Things
- MUST Multi-user Superposition Transmission
- FIG. 1 is a schematic diagram of multi-user superimposed transmission.
- the basic principle of MUST is that a base station (for example, an eNB) schedules two user equipments (UE, User Equipment) in different locations to use the same physical resource (time domain). And the frequency domain), by allocating different transmission powers, the near-end user equipment (such as UE2 in FIG. 1) can detect the signal transmitted to the remote user equipment (such as UE1 in FIG. 1).
- the near-end user equipment can detect the signal of the UE1 relatively accurately, and receive the signal.
- the detected signal of UE1 is subtracted from the total signal, and the remaining signal is UE2 and other noise and interference signals, and the signal sent to UE2 can be detected by using the conventional signal detection method.
- the data of the near-end user equipment is also transmitted on the same physical resource, since the power transmitted to the near-end user equipment is low, the power is very low when reaching the remote user equipment. It can be considered that there is not much impact on the signal detection of the remote user equipment. Therefore, the throughput of the system can be improved by simultaneously transmitting signals of two user equipments on the same physical resource.
- the standby signal has a difference in received power.
- two user equipments need to be placed at a distance of one distance.
- the near-end user equipment also needs to obtain control information of the remote user equipment.
- the near-end user equipment needs to obtain the Modulation Coding Scheme (MCS) of the remote user equipment to eliminate the interference of the remote user equipment by using an appropriate interference cancellation algorithm.
- MCS Modulation Coding Scheme
- RBA resource block allocation
- the Precoding Matrix Index (PMI) of the signal sent to the remote user equipment should also be notified to the near-end user equipment. If the two user equipments use the same PMI, It should also be clearly indicated in the system signaling.
- PMI Precoding Matrix Index
- the downlink control information of the remote user equipment (including the MCS, RBA, PMI, etc. listed above) is very useful for the near-end user equipment.
- the downlink control information of each user equipment is sent to a specific user equipment, for example, the downlink control information is sent to a specific user equipment through a Physical Downlink Control Channel (PDCCH).
- PDCCH Physical Downlink Control Channel
- Embodiments of the present invention provide a method, an apparatus, and a communication system for transmitting downlink control information. Try to avoid the impact of user equipment on the DCI decoding behavior in the existing system, and it will not lead to an increase in signaling complexity.
- a method for transmitting downlink control information includes:
- the base station sends downlink control information for performing multi-user overlay transmission; wherein the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment.
- a transmission apparatus for downlink control information where the transmission apparatus includes:
- An information sending unit that transmits downlink control information for performing multi-user overlay transmission; wherein the downlink control information includes control information of the first user equipment and a second user equipment that performs multi-user overlay transmission with the first user equipment Control information.
- a method for transmitting downlink control information includes:
- downlink control information which is sent by the base station, for performing multi-user superimposed transmission, where the downlink control information includes control information of the second user equipment and multi-user superimposed transmission with the second user equipment Control information of the first user equipment;
- a device for transmitting downlink control information is provided in a second user equipment that performs multi-user overlay transmission with a first user equipment, where the transmission device includes:
- An information receiving unit which receives downlink control information, which is sent by the base station, for performing multi-user superimposed transmission, where the downlink control information includes control information of the first user equipment and control information of the second user equipment;
- An information obtaining unit that obtains control information of the first user equipment and control information of the second user equipment from the downlink control information.
- a communication system comprising:
- a base station which transmits downlink control information for performing multi-user superimposed transmission; wherein the downlink control information includes control information of the first user equipment and control information of the second user equipment;
- the first user equipment performing multi-user overlay transmission with the second user equipment
- the second user equipment receives the downlink control information sent by the base station, and obtains control information of the first user equipment and control information of the second user equipment from the downlink control information.
- a computer readable program wherein when the program is executed in a user equipment, the program causes a computer to perform the downlink as described in the third aspect above in the user equipment Control method of transmission of information.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of downlink control information according to the third aspect above in a user equipment .
- a computer readable program is provided, wherein when executed in a base station When the program is executed, the program causes a computer to execute the transmission method of the downlink control information as described in the first aspect above in the base station.
- a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of downlink control information according to the first aspect above in a base station.
- the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment. Therefore, not only the influence of the user equipment in the existing system on the DCI decoding behavior can be avoided, but also the signaling complexity is not increased.
- Figure 1 is a schematic diagram of multi-user overlay transmission
- FIG. 2 is a schematic diagram of a method for transmitting downlink control information according to Embodiment 1 of the present invention
- FIG. 3 is another schematic diagram of a method for transmitting downlink control information according to Embodiment 1 of the present invention.
- FIG. 4 is another schematic diagram of a method for transmitting downlink control information according to Embodiment 1 of the present invention.
- FIG. 5 is a schematic diagram of a method for transmitting downlink control information according to Embodiment 2 of the present invention.
- FIG. 6 is a schematic diagram of a downlink control information transmission apparatus according to Embodiment 3 of the present invention.
- FIG. 7 is a schematic diagram of a base station according to Embodiment 3 of the present invention.
- FIG. 8 is a schematic diagram of a downlink control information transmission apparatus according to Embodiment 4 of the present invention.
- FIG. 9 is a schematic diagram of a user equipment according to Embodiment 4 of the present invention.
- Figure 10 is a diagram showing the communication system of Embodiment 5 of the present invention.
- FIG. 2 is a schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 2, the transmission method includes:
- Step 201 The base station sends a DCI for performing multi-user overlay transmission, where the DCI includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment.
- the scenario shown in FIG. 1 is taken as an example for description.
- the first user equipment (UE1) is a remote user equipment
- the second user equipment (UE2) is a near-end user equipment
- UE1 and UE2 perform multi-user overlay transmission.
- the present invention is not limited thereto and can be applied to other scenarios.
- the base station may send the DCI including the control information of the UE1 and the control information of the UE2 to the UE2 through the PDCCH.
- the UE2 when receiving the data sent by the base station, the UE2 can relatively accurately detect the signal sent to the UE1 according to the control information of the UE1, and then subtract the signal sent to the UE1 from the data, and then can detect the signal by using the traditional method. Signal sent to UE2.
- control information of the UE1 may include one or more of the following information: MCS information, RBA information, and PMI information.
- MCS information MCS information
- RBA information RBA information
- PMI information PMI information
- control information of the UE1 and the control information of the UE2 in one DCI not only the control information of the UE1 can be sent to the UE2 to perform the MUST, but the UE-side blind detection PDCCH is not added. Complexity, and does not increase the complexity of signaling.
- the DCI of the specific format may be DCI format 2/2a/2b/2c/2d, but the present invention is not limited thereto, and may be, for example, DCI of other formats.
- the following describes the DCI including the control information of two user equipments in the embodiment of the present invention by using the DCI format 2 as an example.
- Table 1 shows schematically some of the fields contained in DCI format 2:
- the DCI includes fields corresponding to two Transmission Blocks (TBs), that is, the MCS of the first transport block (TB1), the New Data Indicator (NDI), and the redundancy version information (RVI). , Redundancy Version Information), and the MCS, NDI, and RVI of the second transport block (TB2), in addition to the transport block to codeword swap flag Field and PMI field.
- TBs Transmission Blocks
- NDI New Data Indicator
- RVI redundancy version information
- the foregoing field may be used to carry the control information of the UE1 and the control information of the UE2, so that the control information of the two UEs may be included in one DCI. That is, the fields corresponding to the two TBs in the DCI may be used to carry the control information of the UE1 and the control information of the UE2, respectively.
- the field corresponding to TB1 is used to transmit the control information of the UE1, and the field corresponding to the TB2 is used to transmit the control information of the UE2; or, in the DCI
- the field corresponding to TB1 is used to transmit the control information of UE2
- the field corresponding to TB2 is used to transmit the control information of UE1.
- the base station may configure the DCI by using RRC (Radio Resource Control) signaling, where the RRC signaling may be used to: indicate that the DCI having the specific format includes the control information of the UE1 and the control information of the UE2; Or indicating that the DCI having the specific format includes the control information of the UE 2. That is, the UE can correctly understand whether the received DCI is control information including only one UE or control information including two UEs.
- RRC Radio Resource Control
- the conventional DCI and the DCI of the embodiment of the present invention can be flexibly configured statically.
- the present invention is not limited thereto.
- the RRC signaling configuration may not be used, and the DCI is pre-agreed to include control information of two UEs.
- the TB2 in the DCI format 2 is used to carry the control information of the UE1, and the TB1 in the DCI format 2 is used to carry the control information of the UE2, but the DCI format 2 in the DCI format 2 is used for the following.
- the invention is not limited thereto.
- the base station may statically notify the UE2 through RRC signaling: when detecting the PDCCH carrying the specific format DCI, the UE2 needs to understand according to the DCI including control information of, for example, two UEs.
- FIG. 3 is another schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 3, the transmission method includes:
- Step 301 The base station sends RRC signaling for configuring DCI to UE2.
- the DCI of the specific format is understood as follows: the control information of the two user equipments (the near-end user equipment and the remote user equipment) is carried at the same time, instead of only Carry control information for a single user device.
- Step 302 The base station sends a DCI to the UE2, where the DCI includes control information of the UE1 and UE2. Control information.
- Step 303 The UE2 acquires control information of the UE1 and control information of the UE2 from the DCI.
- the UE2 may perform multi-user superimposed transmission using the obtained control information of the two UEs, and obtain data sent by the base station to the UE2.
- Step 304 The base station sends, to the UE2, the RRC signaling for de-configuring the DCI, where the signaling is used to indicate the previously configured DCI for multi-user overlay transmission to be DCI for single-user transmission;
- Step 304 is an optional step, and the base station determines whether to send the RRC signaling according to whether it needs to fall back to single-user transmission.
- each field in the DCI format 2 in the embodiment of the present invention is as follows:
- transport block 1 is a TB sent to UE2;
- NDI New data indicator - 1 bit (NDI) - is the NDI sent to UE2;
- RVI Redundancy version–2bits (RVI) - is the RVI sent to UE2;
- transport block 2 is a TB sent to UE1;
- NDI New data indicator - 1 bit (NDI) - is the NDI sent to UE1;
- RVI Redundancy version–2bits (RVI) - is the RVI sent to UE1;
- PMI -Precoding information
- the UE2 configured with the MUST capability can understand the TB2-related information as the transmission control information of the MC1 of the UE1, so that the UE2 is fast.
- the base station may semi-statically notify the UE2 through RRC signaling: when detecting the PDCCH carrying the specific format DCI, the UE2 may understand, according to the DCI, including control information of, for example, two UEs, or may follow the The DCI contains a UE's control information to understand. And, in a case where the DCI satisfies a predetermined condition, the UE 2 understands that the DCI includes, for example, control information of two UEs.
- FIG. 4 is another schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 4, the transmission method includes:
- Step 401 The base station sends RRC signaling for configuring DCI to the UE2.
- the UE2 after receiving the RRC signaling, the UE2 can understand the DCI of the specific format as the control information of the two user equipments (the near-end user equipment and the remote user equipment), and can also be in a specific format.
- the DCI is understood to carry control information of only a single user equipment.
- Step 402 The base station sends a DCI to the UE2, where the DCI includes control information of the UE1 and control information of the UE2.
- the DCI including the control information of the two UEs needs to meet certain preset conditions, and the specific content about the preset conditions is as described later.
- Step 403 UE2 determines that the DCI meets a preset condition
- Step 404 The UE2 acquires control information of the UE1 and control information of the UE2 from the DCI.
- the UE2 can accurately determine whether to acquire control information of one UE or control information of two UEs according to whether the DCI satisfies a preset condition.
- Step 405 The base station sends, to the UE2, the RRC signaling for canceling the DCI configuration, where the signaling is used to indicate the previously configured DCI for multi-user overlay transmission to be DCI for single-user transmission; step 405 is an optional step, the base station is Whether to transmit the RRC signaling is determined according to whether it is necessary to fall back to the single user transmission.
- the DCI of the specific format is understood as follows: only the control information of the single user equipment (UE2 itself) is carried.
- the preset condition may be a bit combination of certain fields in the DCI, but the present invention is not limited thereto.
- the predetermined condition may include: a coded modulation mode (MCS) of a certain transport block in the DCI
- MCS coded modulation mode
- the value is 0 to 28 (when the system does not support 256QAM, for example, the value of MCS is 0 to 28, which can be 0 or 28) or 0 to 27 (when the system supports 256QAM, such as MCS)
- MCS coded modulation mode
- the value is 0 to 27, which can be 0 or 27
- NDI new data indication
- each field in the DCI format 2 in the embodiment of the present invention is as follows:
- transport block 1 is a TB sent to UE2;
- NDI New data indicator - 1 bit (NDI) - is the NDI sent to UE2;
- RVI Redundancy version–2bits (RVI) - is the RVI sent to UE2;
- transport block 2 is a TB sent to UE1;
- MCS Modulation and coding scheme - 5 bits (MCS) - is the MCS sent to UE1; wherein the value of the MCS is 0 to 28 (when the system does not support 256QAM), or 0 to 27 (when the system supports 256QAM);
- -New data indicator - 1 bit (NDI) - is the NDI sent to UE1; wherein the NDI is not flipped;
- RVI Redundancy version–2bits (RVI) - is the RVI sent to UE1;
- PMI -Precoding information
- the predetermined condition includes: a coded modulation mode (MCS) of a certain transport block in the DCI is 29 to 31 (when the system does not support 256QAM) or 28 to 31 (when the system supports 256QAM) And the new data indication (NDI) of the transport block is not toggled; the specific meaning of whether the NDI is flipped can be referred to the related art.
- MCS coded modulation mode
- NDI new data indication
- each field in the DCI format 2 in the embodiment of the present invention is as follows:
- transport block 1 is a TB sent to UE2;
- NDI New data indicator - 1 bit (NDI) - is the NDI sent to UE2;
- RVI Redundancy version–2bits (RVI) - is the RVI sent to UE2;
- transport block 2 is a TB sent to UE1;
- MCS Modulation and coding scheme - 5 bits (MCS) - is the MCS sent to UE1; wherein the value of the MCS is 29 to 31 (when the system does not support 256QAM), or 28 to 31 (when the system supports 256QAM);
- -New data indicator - 1 bit (NDI) - is the NDI sent to UE1; wherein the NDI is not flipped;
- RVI Redundancy version–2bits (RVI) - is the RVI sent to UE1;
- PMI -Precoding information
- the UE having the MUST capability can determine whether the DCI contains another UE according to a specific combination of certain bits in the DCI when receiving the specific DCI. information.
- the UE receiving the DCI understands the control information of one TB in the DCI as its own control information, and the control information of the other TB as the control information of another UE, and A MUST related receiving algorithm can be performed.
- the UE that receives the DCI can understand the DCI according to the control signaling format of the existing system, that is, the DCI only carries the control information sent to the UE.
- the method shown in FIG. 4 can be more flexibly in MUST and Traditional orthogonal transmission techniques are switched between, and there is no need to increase the number of blind detections at the UE side.
- the DCI format 2 is used as an example.
- DCI format 2a/2b/2c/2d a similar design can be used to carry the UE receiving the DCI (such as the near-end user equipment) by using information such as MCS of one TB in the DCI.
- the control information of the UE2) uses information such as the MCS of another TB in the DCI to carry control information of another UE (such as the remote user equipment UE1) during the MUST transmission.
- the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment. Therefore, not only the influence of the user equipment in the existing system on the DCI decoding behavior can be avoided, but also the signaling complexity is not increased.
- the embodiment of the invention provides a method for transmitting downlink control information, which is described from the user equipment side; wherein the near-end user equipment (UE2) and the remote user equipment (UE1) perform multi-user superposition transmission.
- UE2 near-end user equipment
- UE1 remote user equipment
- FIG. 5 is a schematic diagram of a method for transmitting downlink control information according to an embodiment of the present invention. As shown in FIG. 5, the transmission method includes:
- Step 501 The UE2 receives the DCI sent by the base station for performing multi-user superimposed transmission, where the DCI includes control information of the UE1 and control information of the UE2.
- Step 502 The UE2 obtains control information of the UE1 and control information of the UE2 from the DCI.
- the UE2 when receiving the data transmitted by the base station, the UE2 can detect the signal sent to the UE1 according to the control information of the UE1, and after subtracting the signal sent to the UE1 from the data, can detect the signal sent to the UE2 itself. .
- the UE2 may receive the RRC signaling sent by the base station for configuring the DCI.
- the RRC signaling may be used to: indicate that the DCI having the specific format includes the control information of the UE1 and the control information of the UE2; or indicate that the DCI having the specific format includes the control information of the UE2.
- control information of the UE1 may include one or more of the following information: MCS information, RBA information, and PMI information.
- MCS information MCS information
- RBA information RBA information
- PMI information PMI information
- the fields corresponding to the two transport blocks in the DCI may be used to carry the control information of the UE1 and the control information of the UE2, respectively.
- the UE2 may also determine whether the DCI satisfies a predetermined condition; the DCI satisfies a predetermined condition. In the case of the UE2, the UE2 obtains the control information of the UE1 and the control information of the UE2 from the DCI; if the DCI does not satisfy the predetermined condition, the UE2 obtains the control information of the UE2 from the DCI.
- the predetermined condition may include, for example, that the MCS of a certain transport block (for example, TB2) in the DCI has a value of 0 to 28 or 0 to 27, and the NDI of the transport block is not inverted; or, a certain transmission in the DCI.
- the MCS of the block e.g., TB2
- the MCS of the block has a value of 29 to 31 or 28 to 31, and the NDI of the transport block is not flipped.
- the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment. Therefore, not only the influence of the user equipment in the existing system on the DCI decoding behavior can be avoided, but also the signaling complexity is not increased.
- the embodiment of the invention provides a transmission device for downlink control information, which is configured in a base station; wherein the near-end user equipment (UE2) and the remote user equipment (UE1) perform multi-user superposition transmission.
- the embodiment of the present invention corresponds to the method for transmitting downlink control information described in Embodiment 1, and the same content is not described herein again.
- FIG. 6 is a schematic diagram of a downlink control information transmission apparatus according to an embodiment of the present invention. As shown in FIG. 6, the downlink control information transmission apparatus 600 includes:
- the information transmitting unit 601 transmits a DCI for performing multi-user superimposed transmission; wherein the DCI includes control information of the UE1 and control information of the UE2 that performs multi-user superimposed transmission with the UE1.
- the transmission device 600 for downlink control information may further include:
- the signaling sending unit 602 sends RRC signaling for configuring DCI.
- the RRC signaling may be used to: indicate that the DCI having the specific format includes the control information of the UE1 and the control information of the UE2; or indicate that the DCI having the specific format includes the control information of the UE2.
- control information of the UE1 may include one or more of the following information: MCS information, RBA information, and PMI information.
- MCS information MCS information
- RBA information RBA information
- PMI information PMI information
- the fields corresponding to the two transport blocks in the DCI may be used to carry the control information of the UE1 and the control information of the UE2, respectively.
- the field corresponding to the first transport block (TB1) is used to transmit the control information of the UE1, corresponding to the second transport block (TB2).
- the field is used to transmit the control information of the UE2; or, when the value of the Transport block to codeword swap flag in the DCI is 0, the field corresponding to the first transport block is used to transmit the control information of the UE2, corresponding to the second transmission.
- the fields of the block are used to transmit control information of UE1.
- the information corresponding to the transport block is the control information of the UE1.
- the precoding information in the DCI is PMI information commonly used by UE1 and UE2.
- the DCI may include control information of the UE1 and control information of the UE2 if the DCI satisfies a predetermined condition.
- the predetermined condition may include, for example, that the MCS of a certain transport block (for example, TB2) in the DCI has a value of 0 to 28 or 0 to 27, and the NDI of the transport block is not inverted; or, a certain transmission in the DCI.
- the MCS of the block e.g., TB2
- the MCS of the block has a value of 29 to 31 or 28 to 31, and the NDI of the transport block is not flipped.
- the embodiment of the invention further provides a base station, which is provided with the downlink control information transmission device 600 as described above.
- FIG. 7 is a schematic diagram of a structure of a base station according to an embodiment of the present invention.
- base station 700 can include a central processing unit (CPU) 200 and memory 210; and memory 210 is coupled to central processing unit 200.
- the memory 210 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 200.
- the function of the transmission device 600 of the downlink control information may be integrated into the central processing unit 200.
- the central processing unit 200 can be configured to implement the transmission method of the downlink control information as described in Embodiment 1.
- the base station 700 may further include: a transceiver 220, an antenna 230, and the like; wherein the functions of the foregoing components are similar to those of the prior art, and are not described herein again. It should be noted that the base station 700 also does not have to include all the components shown in FIG. 7; in addition, the base station 700 may further include components not shown in FIG. 7, and reference may be made to the prior art.
- the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment. Therefore, not only the influence of the user equipment in the existing system on the DCI decoding behavior can be avoided, but also the signaling complexity is not increased.
- the embodiment of the invention provides a downlink control information transmission device, which is configured in a near-end user equipment (UE2) in.
- the near-end user equipment (UE2) and the remote user equipment (UE1) perform multi-user overlay transmission.
- the embodiment of the present invention corresponds to the method for transmitting downlink control information described in Embodiment 2, and the same content is not described herein again.
- FIG. 8 is a schematic diagram of a downlink control information transmission apparatus according to an embodiment of the present invention. As shown in FIG. 8, the downlink control information transmission apparatus 800 includes:
- the information receiving unit 801 is configured to receive, by the base station, a DCI for performing multi-user superimposed transmission, where the DCI includes control information of the UE1 and control information of the UE2.
- the information acquisition unit 802 obtains control information of the UE1 and control information of the UE2 from the DCI.
- the UE2 when receiving the data transmitted by the base station, the UE2 can detect the signal sent to the UE1 according to the control information of the UE1, and after subtracting the signal sent to the UE1 from the data, can detect the signal sent to the UE2 itself. .
- the transmission device 800 for downlink control information may further include:
- the signaling receiving unit 803 receives the RRC signaling sent by the base station for configuring the DCI.
- the RRC signaling may be used to: indicate that the DCI having the specific format includes the control information of the UE1 and the control information of the UE2; or indicate that the DCI having the specific format includes the control information of the UE2.
- control information of the UE1 may include one or more of the following information: MCS information, RBA information, and PMI information.
- MCS information MCS information
- RBA information RBA information
- PMI information PMI information
- the fields corresponding to the two transport blocks in the DCI may be used to carry the control information of the UE1 and the control information of the UE2, respectively.
- the DCI may include control information of the UE1 and control information of the UE2 if the DCI satisfies a predetermined condition.
- the transmission device 800 for downlink control information may further include:
- the condition determining unit 804 determines whether the DCI satisfies a predetermined condition
- the information obtaining unit 802 is further configured to obtain control information of the UE1 and control information of the UE2 from the DCI if the DCI satisfies the predetermined condition.
- the predetermined condition may include: the value of the MCS of a certain transport block (for example, TB2) in the DCI is 0 to 28 or 0 to 27, and the NDI of the transport block is not reversed; or, a certain transmission in the DCI
- the MCS of the block e.g., TB2
- the embodiment of the invention further provides a user equipment, and the transmission device 800 configured with the downlink control information described above.
- FIG. 9 is a schematic diagram of a user equipment according to an embodiment of the present invention.
- the user device 900 can include a central processing unit 100 and a memory 140; the memory 140 is coupled to the central processing unit 100.
- the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
- the functionality of the transmission device 800 of the downlink control information may be integrated into the central processor 100.
- the central processing unit 100 can be configured to implement the transmission method of the downlink control information as described in Embodiment 1.
- the downlink control information transmission device 800 can be configured separately from the central processing unit 100.
- the downlink control information transmission device 800 can be configured as a chip connected to the central processing unit 100, and controlled by the central processing unit. The function of the transmission device 800 that implements downlink control information.
- the user equipment 900 may further include: a communication module 110, an input unit 120, an audio processing unit 130, a memory 140, a camera 150, a display 160, and a power source 170.
- the functions of the above components are similar to those of the prior art, and are not described herein again. It should be noted that the user equipment 900 does not have to include all the components shown in FIG. 9, and the above components are not required; in addition, the user equipment 900 may further include components not shown in FIG. There are technologies.
- the downlink control information includes control information of the first user equipment and control information of the second user equipment that performs multi-user overlay transmission with the first user equipment. Therefore, not only the influence of the user equipment in the existing system on the DCI decoding behavior can be avoided, but also the signaling complexity is not increased.
- the embodiment of the present invention further provides a communication system, and the same contents as those of Embodiments 1 to 4 are not described herein.
- FIG. 10 is a schematic diagram of a communication system according to an embodiment of the present invention.
- the communication system 1000 includes: a base station 1001, a first user equipment 1002, and a second user equipment 1003.
- the base station 1001 sends a DCI for performing multi-user superimposed transmission; the DCI includes control information of the first user equipment 1002 and control information of the second user equipment 1003; the first user equipment 1002 and the second user equipment 1003 perform multi-user Superimposed transmission; and the second user equipment 1003 receives the DCI sent by the base station 1001, and obtains control information of the first user equipment 1002 and control information of the second user equipment 1003 from the DCI.
- the second user equipment 1003 is further configured to: receive data sent by the base station 1001.
- the signal sent to the first user equipment 1002 is detected according to the control information of the first user equipment 1002, and the signal sent to the first user equipment 1002 is subtracted from the data, the second user equipment can be detected and sent. 1003 own signal.
- An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a user equipment, the program causes a computer to execute a transmission method of downlink control information as described in Embodiment 2 in the user equipment.
- An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute a transmission method of downlink control information as described in Embodiment 2 in a user equipment.
- An embodiment of the present invention provides a computer readable program, wherein when the program is executed in a base station, the program causes a computer to perform a transmission method of downlink control information as described in Embodiment 1 in the base station.
- An embodiment of the present invention provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a transmission method of downlink control information as described in Embodiment 1 in a base station.
- the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
- the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
- the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
- One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
- DSP digital signal processor
- ASIC application specific integrated circuit
- FPGA field programmable gate array
- One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.
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Abstract
一种下行控制信息的传输方法、装置以及通信系统。所述传输方法包括:基站发送用于进行多用户叠加传输的下行控制信息;其中该下行控制信息包括第一用户设备的控制信息以及与该第一用户设备进行多用户叠加传输的第二用户设备的控制信息。由此,不但可以尽量避免现有系统中用户设备对DCI解码行为的影响,而且不会导致信令复杂度的增加。
Description
本发明涉及通信技术领域,特别涉及一种下行控制信息(DCI,Downlink Control Information)的传输方法、装置以及通信系统。
基于长期演进(LTE,Long Term Evolution)/LTE-A(LTE Advanced)通信技术的蜂窝网络得到了越来越多的商业部署和应用,越来越多的智能终端通过LTE网络和世界进行高效快速访问。与此同时,其他终端也逐渐被智能化,例如物联网(IoT,Internet of Things)也需要通过该广域部署的网络进行数据传输。作为无线运营商和设备商来说,如何在有限的网络资源上提供更多的容量或者覆盖将是一个永恒的难题。
最近几年来,一种新的无线传输技术:多用户叠加传输(MUST,Multiple User Superposition Transmission)逐渐引起了研究人员的兴趣,并开始在第三代合作伙伴计划(3GPP,3rd Generation Partnership Project)全球标准化通信协议中引入该技术。
图1是多用户叠加传输的一示意图,如图1所示,MUST的基本原理为基站(例如eNB)调度两个处于不同位置的用户设备(UE,User Equipment)使用相同的物理资源(时域和频域),通过分配不同的发送功率,使得近端用户设备(如图1中的UE2)可以检测发送给远端用户设备(如图1中的UE1)的信号。
由于发送给远端用户设备的信号的功率高,因此到达近端用户设备侧的接收功率也高,对该近端用户设备(UE2)来说,可以比较准确的检测出UE1的信号,从接收的总信号中减去检测出的UE1的信号,剩下的就是UE2的信号以及其他噪声和干扰信号,再使用传统的信号检测方法就可以检测出发送给UE2的信号。
对于远端用户设备(UE1)而言,虽然近端用户设备的数据也在相同的物理资源上发送,但是由于发送给近端用户设备的功率低,到达远端用户设备时功率已经非常低,可以认为不会对远端用户设备的信号检测有太多的影响。所以,通过在相同的物理资源上同时发送两个用户设备的信号,可以提高系统的吞吐量。
MUST技术能够获得容量增益取决于下面的信息:需要保证基站发送到两用户设
备的信号存在接收功率差,例如两个用户设备需要处于一近一远的距离配置。此外近端用户设备还需要获得远端用户设备的控制信息。
例如,近端用户设备需要获得远端用户设备的调制编码方式(MCS,Modulation Coding Scheme)以便使用合适的干扰消除算法消除远端用户设备的干扰。近端用户设备也需要获得远端用户设备的资源块分配(RBA,Resource Block Allocation)信息,以便能正确的检测远端用户设备的数据,如果两个用户设备的RB占用相同,也应该在系统信令中明确指示。
更进一步,为了在多天线系统使用,发送给远端用户设备的信号的预编码矩阵指示信息(PMI,Precoding Matrix Index)也应该通知给近端用户设备,如果两个用户设备采用的PMI一样,也应该在系统信令中明确指示。
应该注意,上面对技术背景的介绍只是为了方便对本发明的技术方案进行清楚、完整的说明,并方便本领域技术人员的理解而阐述的。不能仅仅因为这些方案在本发明的背景技术部分进行了阐述而认为上述技术方案为本领域技术人员所公知。
发明内容
发明人发现:远端用户设备的下行控制信息(包括上述所列的MCS、RBA、PMI等)对于近端用户设备非常有用。但是在现有LTE通信系统中,每个用户设备的下行控制信息都是发送给特定的某个用户设备,例如下行控制信息通过物理下行控制信道(PDCCH,Physical Downlink Control Channel)发送给特定用户设备。如果基站需要向近端用户设备通知远端用户设备的控制信息,则需要特别的指示信令,为此将导致信令复杂度的增加。
本发明实施例提供一种下行控制信息的传输方法、装置以及通信系统。尽量避免现有系统中用户设备对DCI解码行为的影响,同时不会导致信令复杂度的增加。
根据本发明实施例的第一个方面,提供一种下行控制信息的传输方法,包括:
基站发送用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括第一用户设备的控制信息以及与所述第一用户设备进行多用户叠加传输的第二用户设备的控制信息。
根据本发明实施例的第二个方面,提供一种下行控制信息的传输装置,配置基站中,所述传输装置包括:
信息发送单元,其发送用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括第一用户设备的控制信息以及与所述第一用户设备进行多用户叠加传输的第二用户设备的控制信息。
根据本发明实施例的第三个方面,提供一种下行控制信息的传输方法,包括:
第二用户设备接收基站发送的用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括所述第二用户设备的控制信息以及与所述第二用户设备进行多用户叠加传输的第一用户设备的控制信息;
从所述下行控制信息中获得所述第一用户设备的控制信息以及所述第二用户设备的控制信息。
根据本发明实施例的第四个方面,提供一种下行控制信息的传输装置,配置于与第一用户设备进行多用户叠加传输的第二用户设备中,所述传输装置包括:
信息接收单元,其接收基站发送的用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括所述第一用户设备的控制信息以及所述第二用户设备的控制信息;
信息获取单元,其从所述下行控制信息中获得所述第一用户设备的控制信息以及所述第二用户设备的控制信息。
根据本发明实施例的第五个方面,提供一种通信系统,所述通信系统包括:
基站,其发送用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括第一用户设备的控制信息以及第二用户设备的控制信息;
所述第一用户设备,其与所述第二用户设备进行多用户叠加传输;以及
所述第二用户设备,其接收所述基站发送的所述下行控制信息,并从所述下行控制信息中获得所述第一用户设备的控制信息以及所述第二用户设备的控制信息。
根据本发明实施例的又一个方面,提供一种计算机可读程序,其中当在用户设备中执行所述程序时,所述程序使得计算机在所述用户设备中执行如上第三方面所述的下行控制信息的传输方法。
根据本发明实施例的又一个方面,提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在用户设备中执行如上第三方面所述的下行控制信息的传输方法。
根据本发明实施例的又一个方面,提供一种计算机可读程序,其中当在基站中执
行所述程序时,所述程序使得计算机在所述基站中执行如上第一方面所述的下行控制信息的传输方法。
根据本发明实施例的又一个方面,提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在基站中执行如上第一方面所述的下行控制信息的传输方法。
本发明实施例的有益效果在于,下行控制信息包括第一用户设备的控制信息以及与所述第一用户设备进行多用户叠加传输的第二用户设备的控制信息。由此,不但可以尽量避免现有系统中用户设备对DCI解码行为的影响,而且不会导致信令复杂度的增加。
参照后文的说明和附图,详细公开了本发明的特定实施方式,指明了本发明的原理可以被采用的方式。应该理解,本发明的实施方式在范围上并不因而受到限制。在所附权利要求的精神和条款的范围内,本发明的实施方式包括许多改变、修改和等同。
针对一种实施方式描述和/或示出的特征可以以相同或类似的方式在一个或更多个其它实施方式中使用,与其它实施方式中的特征相组合,或替代其它实施方式中的特征。
应该强调,术语“包括/包含”在本文使用时指特征、整件、步骤或组件的存在,但并不排除一个或更多个其它特征、整件、步骤或组件的存在或附加。
参照以下的附图可以更好地理解本发明的很多方面。附图中的部件不是成比例绘制的,而只是为了示出本发明的原理。为了便于示出和描述本发明的一些部分,附图中对应部分可能被放大或缩小。
在本发明的一个附图或一种实施方式中描述的元素和特征可以与一个或更多个其它附图或实施方式中示出的元素和特征相结合。此外,在附图中,类似的标号表示几个附图中对应的部件,并可用于指示多于一种实施方式中使用的对应部件。
图1是多用户叠加传输的一示意图;
图2是本发明实施例1的下行控制信息的传输方法的一示意图;
图3是本发明实施例1的下行控制信息的传输方法的另一示意图;
图4是本发明实施例1的下行控制信息的传输方法的另一示意图;
图5是本发明实施例2的下行控制信息的传输方法的一示意图;
图6是本发明实施例3的下行控制信息的传输装置的一示意图;
图7是本发明实施例3的基站的一示意图;
图8是本发明实施例4的下行控制信息的传输装置的一示意图;
图9是本发明实施例4的用户设备的一示意图;
图10是本发明实施例5的通信系统的一示意图。
参照附图,通过下面的说明书,本发明的前述以及其它特征将变得明显。在说明书和附图中,具体公开了本发明的特定实施方式,其表明了其中可以采用本发明的原则的部分实施方式,应了解的是,本发明不限于所描述的实施方式,相反,本发明包括落入所附权利要求的范围内的全部修改、变型以及等同物。
实施例1
本发明实施例提供一种下行控制信息的传输方法,从基站侧进行说明。图2是本发明实施例的下行控制信息的传输方法的一示意图,如图2所示,所述传输方法包括:
步骤201,基站发送用于进行多用户叠加传输的DCI;其中该DCI包括第一用户设备的控制信息以及与第一用户设备进行多用户叠加传输的第二用户设备的控制信息。
在本实施例中,以图1所示的场景为例进行说明。第一用户设备(UE1)为远端用户设备,第二用户设备(UE2)为近端用户设备;UE1和UE2进行多用户叠加传输。但本发明不限于此,还可以应用于其他的场景。
在本实施例中,基站可以通过PDCCH向UE2发送包括UE1的控制信息和UE2的控制信息的DCI。此外,UE2在接收到基站发送的数据时,可以根据UE1的控制信息比较准确地检测出发送给UE1的信号,然后从该数据中减去该发送给UE1的信号,再使用传统方法可以检测出发送给UE2的信号。
在本实施例中,UE1的控制信息可以包括如下信息的一种或多种:MCS信息、RBA信息、PMI信息。但本发明不限于此,例如还可以是其他的下行控制信息。
由此,本发明实施例通过将UE1的控制信息和UE2的控制信息包含在一个DCI中,不但可以向UE2发送UE1的控制信息以进行MUST,不增加UE端盲检PDCCH
的复杂度,而且不会增加信令的复杂度。
在本实施例中,特定格式的DCI可以为DCI format 2/2a/2b/2c/2d,但本发明不限于此,例如还可以是其他格式的DCI。以下仅以DCI format 2为例,对本发明实施例中包含两个用户设备的控制信息的DCI进行说明。
表1示意性示出了DCI format 2中所包含的部分字段:
表1
如表1所示,DCI包括对应两个传输块(TB,Transmission Block)的字段,即第一传输块(TB1)的MCS、新数据指示(NDI,New Data Indicator)和冗余版本信息(RVI,Redundancy Version Information),以及第二传输块(TB2)的MCS、NDI和RVI,此外还包括传输块对码字交换标记(Transport block to codeword swap flag)
字段以及PMI字段。
在本实施例中,可以利用上述字段来承载UE1的控制信息以及UE2的控制信息,由此可以在一个DCI中包含两个UE的控制信息。即,DCI中对应两个TB的字段可以分别被用于承载UE1的控制信息和UE2的控制信息。
例如,当DCI中Transport block to codeword swap flag的值为1时,对应于TB1的字段被用于传输UE1的控制信息,对应于TB2的字段被用于传输UE2的控制信息;或者,当DCI中的Transport block to codeword swap flag的值为0时,对应于TB1的字段被用于传输UE2的控制信息,对应于TB2的字段被用于传输UE1的控制信息。
在本实施例中,基站可以使用无线资源控制(RRC,Radio Resource Control)信令对DCI进行配置,RRC信令可以用于:指示具有特定格式的DCI包括UE1的控制信息以及UE2的控制信息;或者指示具有特定格式的DCI包括UE2的控制信息。即,使得UE可以正确地理解接收到的DCI是仅包含一个UE的控制信息还是包含两个UE的控制信息。
由此,可以灵活地对传统的DCI以及本发明实施例的DCI进行静态配置。但本发明不限于此,例如也可以不使用RRC信令配置,而事先约定DCI均包含两个UE的控制信息。
以下仅以基站向UE2发送DCI format 2为例进行示意性说明,其中该DCI format2中的TB2被用于携带UE1的控制信息,该DCI format 2中的TB1被用于携带UE2的控制信息;但本发明不限于此。
在一个实施方式中,基站可以通过RRC信令静态地通知UE2:当检测到携带特定格式DCI的PDCCH时,UE2需要按照该DCI包含例如两个UE的控制信息来理解。
图3是本发明实施例的下行控制信息的传输方法的另一示意图,如图3所示,所述传输方法包括:
步骤301,基站向UE2发送配置DCI的RRC信令;
在本实施方式中,当UE2接收到该RRC信令后,将对特定格式的DCI进行如下理解:同时携带两个用户设备(近端用户设备和远端用户设备)的控制信息,而不是只携带单个用户设备的控制信息。
步骤302,基站向UE2发送DCI,其中该DCI包括UE1的控制信息以及UE2的
控制信息。
步骤303,UE2从DCI中获取UE1的控制信息以及UE2的控制信息。
在本实施例中,UE2可以使用获得的两个UE的控制信息进行多用户叠加传输,获得基站发送给UE2的数据。
步骤304,基站向UE2发送解除配置DCI的RRC信令,该信令用于指示之前配置的用于多用户叠加传输的DCI回退为单用户传输的DCI;
在本实施方式中,当UE2接收到该RRC信令后,将对特定格式的DCI进行如下理解:只携带单个用户设备(即UE2自己)的控制信息。步骤304为可选步骤,基站根据是否需要回退到单用户传输来决定是否发送该RRC信令。
以DCI中的Transport block to codeword swap flag为0为例,本发明实施例的DCI format 2中各字段的意义例如如下:
In addition,for transport block 1:为发送给UE2的TB;
-Modulation and coding scheme–5bits(MCS)-为发送给UE2的MCS;
-New data indicator–1bit(NDI)-为发送给UE2的NDI;
-Redundancy version–2bits(RVI)-为发送给UE2的RVI;
In addition,for transport block 2:为发送给UE1的TB;
-Modulation and coding scheme–5bits(MCS)-为发送给UE1的MCS;
-New data indicator–1bit(NDI)-为发送给UE1的NDI;
-Redundancy version–2bits(RVI)-为发送给UE1的RVI;
-Precoding information(PMI)为UE1和UE2同时采用的PMI,并且该PMI对应为单码(one codeword)传输时的PMI。
对于DCI format 2中其他字段不进行改变,可以参考现有技术。
此外,该DCI中的一个TB(TB1)可以承载接收到该DCI的UE(UE2)的控制信息,对于DCI中的另一个TB(TB2),不再按现有系统的方式判断是否被使能(enable),具体来说,在现有系统中,当TB2的MCS=0,并且该TB2的RVI=1时,该TB2被判断为去能(disable)。而在本发明实施例中,该TB2被定为对应UE1的控制信息。
由此,通过一个新的专用RRC信令,即可配置有MUST能力的UE2接收特定DCI时,将TB2相关的信息理解为UE1的MCS等传输控制信息,以便让UE2快速
获取UE1的MCS等信息。
在另一个实施方式中,基站可以通过RRC信令半静态地通知UE2:当检测到携带特定格式DCI的PDCCH时,UE2可以按照该DCI包含例如两个UE的控制信息来理解,也可以按照该DCI包含一个UE的控制信息来理解。并且,在DCI满足预定条件的情况下,UE2按照该DCI包含例如两个UE的控制信息来理解。
图4是本发明实施例的下行控制信息的传输方法的另一示意图,如图4所示,所述传输方法包括:
步骤401,基站向UE2发送配置DCI的RRC信令;
在本实施方式中,当UE2接收到该RRC信令后,可以将特定格式的DCI理解为同时携带两个用户设备(近端用户设备和远端用户设备)的控制信息,也可以将特定格式的DCI理解为只携带单个用户设备的控制信息。
步骤402,基站向UE2发送DCI,其中该DCI包括UE1的控制信息以及UE2的控制信息。
在本实施方式中,包含两个UE的控制信息的DCI需要满足一定的预设条件,关于预设条件的具体内容如后所述。
步骤403,UE2确定DCI满足预设条件;
步骤404,UE2从DCI中获取UE1的控制信息和UE2的控制信息。
在本实施方式中,如果DCI满足预设条件,则该DCI包含两个UE的控制信息,如果DCI不满足预设条件,则该DCI包含一个UE的控制信息。由此,UE2可以根据DCI是否满足预设条件,来准确地确定是获取一个UE的控制信息还是获取两个UE的控制信息。
步骤405,基站向UE2发送解除DCI配置的RRC信令,该信令用于指示之前配置的用于多用户叠加传输的DCI回退为单用户传输的DCI;步骤405是可选的步骤,基站根据是否需要回退到单用户传输来决定是否发送该RRC信令。
在本实施方式中,当UE2接收到该RRC信令后,将对特定格式的DCI进行如下理解:只携带单个用户设备(UE2自己)的控制信息。
在本实施方式中,预设条件可以是DCI中某些字段的比特组合,但本发明不限于此。
在一个方式中,该预定条件可以包括:DCI中某一传输块的编码调制方式(MCS)
的取值为0至28(当系统不支持256QAM时,例如MCS的值为0至28中的某个数,其中可以为0或28)或者为0至27(当系统支持256QAM时,例如MCS的值为0至27中的某个数,其中可以为0或27),且该传输块的新数据指示(NDI)没有被翻转(toggled);关于NDI是否被翻转的具体含义可以参考相关技术。
以DCI中的Transport block to codeword swap flag为0为例,本发明实施例的DCI format 2中各字段的意义例如如下:
In addition,for transport block 1:为发送给UE2的TB;
-Modulation and coding scheme–5bits(MCS)-为发送给UE2的MCS;
-New data indicator–1bit(NDI)-为发送给UE2的NDI;
-Redundancy version–2bits(RVI)-为发送给UE2的RVI;
In addition,for transport block 2:为发送给UE1的TB;
-Modulation and coding scheme–5bits(MCS)-为发送给UE1的MCS;其中该MCS的取值为0~28(当系统不支持256QAM时),或者为0~27(当系统支持256QAM时);
-New data indicator–1bit(NDI)-为发送给UE1的NDI;其中该NDI没有被翻转;
-Redundancy version–2bits(RVI)-为发送给UE1的RVI;
-Precoding information(PMI)为UE1和UE2同时采用的PMI,并且该PMI对应为单码(one codeword)传输时的PMI。
对于DCI format 2中其他字段不进行改变,可以参考现有技术。而当TB2的MCS和NDI的组合不是{0~28(不支持256QAM)或者0~27(支持256QAM),不翻转}的情况下,该DCI仅仅携带一个用户设备的控制信息。
在另一个方式中,该预定条件包括:DCI中某一传输块的编码调制方式(MCS)的取值为29至31(当系统不支持256QAM时)或者为28至31(当系统支持256QAM时),且该传输块的新数据指示(NDI)没有被翻转(toggled);关于NDI是否被翻转的具体含义可以参考相关技术。
以DCI中的Transport block to codeword swap flag为0为例,本发明实施例的DCI format 2中各字段的意义例如如下:
In addition,for transport block 1:为发送给UE2的TB;
-Modulation and coding scheme–5bits(MCS)-为发送给UE2的MCS;
-New data indicator–1bit(NDI)-为发送给UE2的NDI;
-Redundancy version–2bits(RVI)-为发送给UE2的RVI;
In addition,for transport block 2:为发送给UE1的TB;
-Modulation and coding scheme–5bits(MCS)-为发送给UE1的MCS;其中该MCS的值为29~31(当系统不支持256QAM时),或者为28~31(当系统支持256QAM时);
-New data indicator–1bit(NDI)-为发送给UE1的NDI;其中该NDI没有被翻转;
-Redundancy version–2bits(RVI)-为发送给UE1的RVI;
-Precoding information(PMI)为UE1和UE2同时采用的PMI,并且该PMI对应为单码(one codeword)传输时的PMI。
对于DCI format 2中其他字段不进行改变,可以参考现有技术。而当TB2的MCS和NDI的组合不是{29~31(不支持256QAM)或者28~31(支持256QAM),不翻转}的情况下,该DCI仅仅携带一个用户设备的控制信息。
此外,当步骤403确定DCI满足预设条件时,该DCI中的一个TB(TB1)可以承载接收到该DCI的UE(UE2)的控制信息;对于该DCI中的另一个TB(TB2),不再按现有系统的方式判断是否被使能(enable),具体来说,在现有系统中,当TB2的MCS=0,并且该TB2的RVI=1时,该TB2被判断为去能(disable),即没有第二个TB。在本发明实施例中,该TB2被定为对应UE1的控制信息。
由此,通过一个新的专用RRC信令,即可配置具有MUST能力的UE在接收到特定DCI时,根据该DCI中某些比特的特定组合,来判断该DCI中是否含有另一个UE的控制信息。
例如,当DCI中出现特定的比特组合时,收到该DCI的UE将DCI中一个TB的控制信息理解为自身的控制信息,将另一个TB的控制信息理解为另一个UE的控制信息,并可进行MUST相关的接收算法。当DCI中未出现特定的比特组合时,收到该DCI的UE可以按照现有系统的控制信令格式理解该DCI,即该DCI仅仅携带发送给该UE的控制信息。
相对于图3所示的静态通知方法,图4所示的方法可以更加灵活地在MUST和
传统正交传输技术之间进行切换,而且不用增加UE端的盲检次数。
以上以DCI format 2为例进行了说明,对于DCI format 2a/2b/2c/2d,可以进行类似地设计,利用DCI中一个TB的MCS等信息来携带接收该DCI的UE(如近端用户设备UE2)的控制信息,利用DCI中另一个TB的MCS等信息来携带在MUST传输时另一个UE(如远端用户设备UE1)的控制信息。
由上述实施例可知,下行控制信息包括第一用户设备的控制信息以及与该第一用户设备进行多用户叠加传输的第二用户设备的控制信息。由此,不但可以尽量避免现有系统中用户设备对DCI解码行为的影响,而且不会导致信令复杂度的增加。
实施例2
本发明实施例提供一种下行控制信息的传输方法,从用户设备侧进行说明;其中近端用户设备(UE2)与远端用户设备(UE1)进行多用户叠加传输。本发明实施例与实施例1相同的内容不再赘述。
图5是本发明实施例的下行控制信息的传输方法的一示意图,如图5所示,所述传输方法包括:
步骤501,UE2接收基站发送的用于进行多用户叠加传输的DCI;其中该DCI包括UE1的控制信息以及UE2的控制信息;
步骤502,UE2从该DCI中获得UE1的控制信息以及UE2的控制信息。
由此,UE2在接收到基站发送的数据时,可以根据UE1的控制信息检测出发送给UE1的信号,并从该数据中减去发送给UE1的信号后,可以检测出发送给UE2自己的信号。
在本实施例中,UE2可以接收基站发送的用于配置DCI的RRC信令。该RRC信令可以用于:指示具有特定格式的DCI包括UE1的控制信息以及UE2的控制信息;或者指示具有特定格式的DCI包括UE2的控制信息。
在本实施例中,UE1的控制信息可以包括如下信息的一种或多种:MCS信息、RBA信息、PMI信息。但本发明不限于此,还可以包括其他的控制信息。
在本实施例中,DCI中对应两个传输块的字段可以分别被用于承载UE1的控制信息和UE2的控制信息。
在本实施例中,UE2还可以判断DCI是否满足预定条件;在DCI满足预定条件
的情况下,UE2从DCI中获得UE1的控制信息以及UE2的控制信息;在DCI不满足预定条件的情况下,UE2从DCI中获得UE2的控制信息。
其中,预定条件例如可以包括:DCI中某一传输块(例如TB2)的MCS的取值为0至28或者为0至27,且该传输块的NDI没有被翻转;或者,DCI中某一传输块(例如TB2)的MCS的取值为29至31或者为28至31,且该传输块的NDI没有被翻转。
由上述实施例可知,下行控制信息包括第一用户设备的控制信息以及与该第一用户设备进行多用户叠加传输的第二用户设备的控制信息。由此,不但可以尽量避免现有系统中用户设备对DCI解码行为的影响,而且不会导致信令复杂度的增加。
实施例3
本发明实施例提供一种下行控制信息的传输装置,配置基站中;其中近端用户设备(UE2)与远端用户设备(UE1)进行多用户叠加传输。本发明实施例对应于实施例1所述的下行控制信息的传输方法,相同的内容不再赘述。
图6是本发明实施例的下行控制信息的传输装置的一示意图,如图6所示,下行控制信息的传输装置600包括:
信息发送单元601,发送用于进行多用户叠加传输的DCI;其中该DCI包括UE1的控制信息以及与UE1进行多用户叠加传输的UE2的控制信息。
如图6所示,下行控制信息的传输装置600还可以包括:
信令发送单元602,发送用于配置DCI的RRC信令。
在一个实施方式中,该RRC信令可以用于:指示具有特定格式的DCI包括UE1的控制信息以及UE2的控制信息;或者指示具有特定格式的DCI包括UE2的控制信息。
在本实施例中,UE1的控制信息可以包括如下信息的一种或多种:MCS信息、RBA信息、PMI信息。但本发明不限于此,还可以包括其他的控制信息。
在本实施例中,DCI中对应两个传输块的字段可以分别被用于承载UE1的控制信息和UE2的控制信息。
例如,当DCI中的Transport block to codeword swap flag的值为1时,对应于第一传输块(TB1)的字段被用于传输UE1的控制信息,对应于第二传输块(TB2)的
字段被用于传输UE2的控制信息;或者,当DCI中的Transport block to codeword swap flag的值为0时,对应于第一传输块的字段被用于传输UE2的控制信息,对应于第二传输块的字段被用于传输UE1的控制信息。
在本实施例中,在DCI中某一传输块(例如TB2)的MCS的值为0且RVI的值为1的情况下,该传输块对应的信息为UE1的控制信息。
在本实施例中,DCI中的预编码信息为UE1和UE2共同采用的PMI信息。
在另一个实施方式中,可以在DCI满足预定条件的情况下,该DCI包括UE1的控制信息以及UE2的控制信息。
其中,预定条件例如可以包括:DCI中某一传输块(例如TB2)的MCS的取值为0至28或者为0至27,且该传输块的NDI没有被翻转;或者,DCI中某一传输块(例如TB2)的MCS的取值为29至31或者为28至31,且该传输块的NDI没有被翻转。
本发明实施例还提供一种基站,配置有如上所述的下行控制信息的传输装置600。
图7是本发明实施例的基站的一构成示意图。如图7所示,基站700可以包括:中央处理器(CPU)200和存储器210;存储器210耦合到中央处理器200。其中该存储器210可存储各种数据;此外还存储信息处理的程序,并且在中央处理器200的控制下执行该程序。
其中,下行控制信息的传输装置600的功能可以被集成到中央处理器200中。中央处理器200可以被配置为实现如实施例1所述的下行控制信息的传输方法。
此外,如图7所示,基站700还可以包括:收发机220和天线230等;其中,上述部件的功能与现有技术类似,此处不再赘述。值得注意的是,基站700也并不是必须要包括图7中所示的所有部件;此外,基站700还可以包括图7中没有示出的部件,可以参考现有技术。
由上述实施例可知,下行控制信息包括第一用户设备的控制信息以及与该第一用户设备进行多用户叠加传输的第二用户设备的控制信息。由此,不但可以尽量避免现有系统中用户设备对DCI解码行为的影响,而且不会导致信令复杂度的增加。
实施例4
本发明实施例提供一种下行控制信息的传输装置,配置于近端用户设备(UE2)
中。其中近端用户设备(UE2)与远端用户设备(UE1)进行多用户叠加传输。本发明实施例对应于实施例2所述的下行控制信息的传输方法,相同的内容不再赘述。
图8是本发明实施例的下行控制信息的传输装置的一示意图,如图8所示,下行控制信息的传输装置800包括:
信息接收单元801,接收基站发送的用于进行多用户叠加传输的DCI;其中该DCI包括UE1的控制信息以及UE2的控制信息;
信息获取单元802,从该DCI中获得UE1的控制信息以及UE2的控制信息。
由此,UE2在接收到基站发送的数据时,可以根据UE1的控制信息检测出发送给UE1的信号,并从该数据中减去发送给UE1的信号后,可以检测出发送给UE2自己的信号。
如图8所示,下行控制信息的传输装置800还可以包括:
信令接收单元803,接收基站发送的用于配置DCI的RRC信令。
在一个实施方式中,该RRC信令可以用于:指示具有特定格式的DCI包括UE1的控制信息以及UE2的控制信息;或者指示具有特定格式的DCI包括UE2的控制信息。
在本实施例中,UE1的控制信息可以包括如下信息的一种或多种:MCS信息、RBA信息、PMI信息。但本发明不限于此,还可以包括其他的控制信息。
在本实施例中,DCI中对应两个传输块的字段可以分别被用于承载UE1的控制信息和UE2的控制信息。
在另一个实施方式中,可以在DCI满足预定条件的情况下,该DCI包括UE1的控制信息以及UE2的控制信息。
如图8所示,下行控制信息的传输装置800还可以包括:
条件判断单元804,判断DCI是否满足预定条件;
信息获取单元802还用于在DCI满足该预定条件的情况下,从DCI中获得UE1的控制信息以及UE2的控制信息。
其中,该预定条件可以包括:DCI中某一传输块(例如TB2)的MCS的取值为0至28或者为0至27,且该传输块的NDI没有被翻转;或者,DCI中某一传输块(例如TB2)的MCS的取值为29至31或者为28至31,且该传输块的NDI没有被翻转。
本发明实施例还提供一种用户设备,配置有上述的下行控制信息的传输装置800。
图9是本发明实施例的用户设备的一示意图。如图9所示,该用户设备900可以包括中央处理器100和存储器140;存储器140耦合到中央处理器100。值得注意的是,该图是示例性的;还可以使用其他类型的结构,来补充或代替该结构,以实现电信功能或其他功能。
在一个实施方式中,下行控制信息的传输装置800的功能可以被集成到中央处理器100中。其中,中央处理器100可以被配置为实现如实施例1所述的下行控制信息的传输方法。
在另一个实施方式中,下行控制信息的传输装置800可以与中央处理器100分开配置,例如可以将下行控制信息的传输装置800配置为与中央处理器100连接的芯片,通过中央处理器的控制来实现下行控制信息的传输装置800的功能。
如图9所示,该用户设备900还可以包括:通信模块110、输入单元120、音频处理单元130、存储器140、照相机150、显示器160、电源170。其中,上述部件的功能与现有技术类似,此处不再赘述。值得注意的是,用户设备900也并不是必须要包括图9中所示的所有部件,上述部件并不是必需的;此外,用户设备900还可以包括图9中没有示出的部件,可以参考现有技术。
由上述实施例可知,下行控制信息包括第一用户设备的控制信息以及与该第一用户设备进行多用户叠加传输的第二用户设备的控制信息。由此,不但可以尽量避免现有系统中用户设备对DCI解码行为的影响,而且不会导致信令复杂度的增加。
实施例5
本发明实施例还提供一种通信系统,与实施例1至4相同的内容不再赘述。
图10是本发明实施例的通信系统的一示意图,如图10所示,通信系统1000包括:基站1001、第一用户设备1002和第二用户设备1003。
其中,基站1001发送用于进行多用户叠加传输的DCI;该DCI包括第一用户设备1002的控制信息以及第二用户设备1003的控制信息;第一用户设备1002与第二用户设备1003进行多用户叠加传输;以及第二用户设备1003接收基站1001发送的该DCI,并从该DCI中获得第一用户设备1002的控制信息以及第二用户设备1003的控制信息。
在本实施例中,第二用户设备1003还可以用于:在接收到基站1001发送的数据
时,根据第一用户设备1002的控制信息检测出发送给第一用户设备1002的信号,并从该数据中减去发送给第一用户设备1002的信号后,可以检测出发送给第二用户设备1003自己的信号。
本发明实施例提供一种计算机可读程序,其中当在用户设备中执行所述程序时,所述程序使得计算机在所述用户设备中执行如实施例2所述的下行控制信息的传输方法。
本发明实施例提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在用户设备中执行如实施例2所述的下行控制信息的传输方法。
本发明实施例提供一种计算机可读程序,其中当在基站中执行所述程序时,所述程序使得计算机在所述基站中执行如实施例1所述的下行控制信息的传输方法。
本发明实施例提供一种存储有计算机可读程序的存储介质,其中所述计算机可读程序使得计算机在基站中执行如实施例1所述的下行控制信息的传输方法。
本发明以上的装置和方法可以由硬件实现,也可以由硬件结合软件实现。本发明涉及这样的计算机可读程序,当该程序被逻辑部件所执行时,能够使该逻辑部件实现上文所述的装置或构成部件,或使该逻辑部件实现上文所述的各种方法或步骤。本发明还涉及用于存储以上程序的存储介质,如硬盘、磁盘、光盘、DVD、flash存储器等。
针对附图中描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,可以实现为用于执行本申请所描述功能的通用处理器、数字信号处理器(DSP)、专用集成电路(ASIC)、现场可编程门阵列(FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件或者其任意适当组合。针对附图描述的功能方框中的一个或多个和/或功能方框的一个或多个组合,还可以实现为计算设备的组合,例如,DSP和微处理器的组合、多个微处理器、与DSP通信结合的一个或多个微处理器或者任何其它这种配置。
以上结合具体的实施方式对本发明进行了描述,但本领域技术人员应该清楚,这些描述都是示例性的,并不是对本发明保护范围的限制。本领域技术人员可以根据本发明的原理对本发明做出各种变型和修改,这些变型和修改也在本发明的范围内。
Claims (20)
- 一种下行控制信息的传输装置,配置于基站中,所述传输装置包括:信息发送单元,其发送用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括第一用户设备的控制信息以及与所述第一用户设备进行多用户叠加传输的第二用户设备的控制信息。
- 根据权利要求1所述的传输装置,其中,所述传输装置还包括:信令发送单元,其发送用于配置所述下行控制信息的无线资源控制信令。
- 根据权利要求2所述的传输装置,其中,所述无线资源控制信令用于:指示具有特定格式的所述下行控制信息包括所述第一用户设备的控制信息以及所述第二用户设备的控制信息;或者指示具有特定格式的所述下行控制信息包括所述第二用户设备的控制信息。
- 根据权利要求1所述的传输装置,其中,所述第一用户设备的控制信息包括如下信息的一种或多种:调制编码方式信息、资源块分配信息、预编码矩阵指示信息。
- 根据权利要求1所述的传输装置,其中,所述下行控制信息中对应两个传输块的字段分别被用于承载所述第一用户设备的控制信息和所述第二用户设备的控制信息。
- 根据权利要求5所述的传输装置,其中,当所述下行控制信息中的传输块对码字交换标记的值为1时,对应于第一传输块的字段被用于传输所述第一用户设备的控制信息,对应于第二传输块的字段被用于传输所述第二用户设备的控制信息;或者,当所述下行控制信息中的传输块对码字交换标记的值为0时,对应于第一传输块的字段被用于传输所述第二用户设备的控制信息,对应于第二传输块的字段被用于传输所述第一用户设备的控制信息。
- 根据权利要求1所述的传输装置,其中,在所述下行控制信息中某一传输块的编码调制方式的值为0且冗余版本信息的值为1的情况下,所述某一传输块对应的信息为所述第一用户设备的控制信息。
- 根据权利要求1所述的传输装置,其中,所述下行控制信息中的预编码信息为所述第一用户设备和所述第二用户设备共同采用的预编码矩阵指示信息。
- 根据权利要求2所述的传输装置,其中,在所述下行控制信息满足预定条件 的情况下,所述下行控制信息包括所述第一用户设备的控制信息以及所述第二用户设备的控制信息。
- 根据权利要求9所述的传输装置,其中,所述预定条件包括:所述下行控制信息中某一传输块的编码调制方式的取值为0至28或者为0至27,且所述某一传输块的新数据指示没有被翻转;或者,所述下行控制信息中某一传输块的编码调制方式的取值为29至31或者为28至31,且所述某一传输块的新数据指示没有被翻转。
- 一种下行控制信息的传输装置,配置于与第一用户设备进行多用户叠加传输的第二用户设备中,所述传输装置包括:信息接收单元,其接收基站发送的用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括所述第一用户设备的控制信息以及所述第二用户设备的控制信息;信息获取单元,其从所述下行控制信息中获得所述第一用户设备的控制信息以及所述第二用户设备的控制信息。
- 根据权利要求11所述的传输装置,其中,所述传输装置还包括:信令接收单元,其接收所述基站发送的用于配置所述下行控制信息的无线资源控制信令。
- 根据权利要求12所述的传输装置,其中,所述无线资源控制信令用于:指示具有特定格式的所述下行控制信息包括所述第一用户设备的控制信息以及所述第二用户设备的控制信息;或者指示具有特定格式的所述下行控制信息包括所述第二用户设备的控制信息。
- 根据权利要求11所述的传输装置,其中,所述第一用户设备的控制信息包括如下信息的一种或多种:调制编码方式信息、资源块分配信息、预编码矩阵指示信息。
- 根据权利要求11所述的传输装置,其中,所述下行控制信息中对应两个传输块的字段分别被用于承载所述第一用户设备的控制信息和所述第二用户设备的控制信息。
- 根据权利要求15所述的传输装置,其中,当所述下行控制信息中的传输块对码字交换标记的值为1时,对应于第一传输块的字段被用于传输所述第一用户设备 的控制信息,对应于第二传输块的字段被用于传输所述第二用户设备的控制信息;或者,当所述下行控制信息中的传输块对码字交换标记的值为0时,对应于第一传输块的字段被用于传输所述第二用户设备的控制信息,对应于第二传输块的字段被用于传输所述第一用户设备的控制信息。
- 根据权利要求12所述的传输装置,其中,所述传输装置还包括:条件判断单元,其判断所述下行控制信息是否满足预定条件;所述信息获取单元还用于:在所述下行控制信息满足所述预定条件的情况下,从所述下行控制信息中获得所述第一用户设备的控制信息以及所述第二用户设备的控制信息。
- 根据权利要求17所述的传输装置,其中,所述预定条件包括:所述下行控制信息中某一传输块的编码调制方式的取值为0至28或者为0至27,且所述某一传输块的新数据指示没有被翻转;或者,所述下行控制信息中某一传输块的编码调制方式的取值为29至31或者为28至31,且所述某一传输块的新数据指示没有被翻转。
- 一种通信系统,所述通信系统包括:基站,其发送用于进行多用户叠加传输的下行控制信息;其中所述下行控制信息包括第一用户设备的控制信息以及第二用户设备的控制信息;所述第一用户设备,其与所述第二用户设备进行多用户叠加传输;以及所述第二用户设备,其接收所述基站发送的所述下行控制信息,并从所述下行控制信息中获得所述第一用户设备的控制信息以及所述第二用户设备的控制信息。
- 根据权利要求19所述的通信系统,其中,所述第二用户设备还用于:在接收到所述基站发送的数据时,根据所述第一用户设备的控制信息检测出发送给所述第一用户设备的信号,并从所述数据中减去发送给所述第一用户设备的信号后检测出发送给所述第二用户设备的信号。
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EP2672648A1 (en) * | 2012-06-06 | 2013-12-11 | Alcatel Lucent | Signaling concept for multi-user detection |
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CN104081697A (zh) * | 2012-01-30 | 2014-10-01 | 诺基亚通信公司 | 非正交发射模式 |
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