Semi-orthogonal transmission-based communication method and device
地域：
Shenzhen
摘要
A semi-orthogonal transmission-based communication method and a device, with the method including receiving, by first user equipment, downlink control information sent by a base station, where the downlink control information includes at least one of downlink control parameter of the first user equipment, pairing layer information of the first user equipment, modulation scheme information of second user equipment, power allocation information, an identifier of the first user equipment, or pairing information, and receiving, by the first user equipment, a data signal of an associated user equipment group that is sent by the base station, by the first user equipment, the data signal of the first user equipment according to the downlink control information and the data signal of the associated user equipment group.
說(shuō)明書(shū)
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This application is a continuation of International Application No. PCT/CN 2015/078672, filed on May 11, 2015, the disclosure of which is hereby incorporated by reference in its entirety.
Embodiments of the present invention relate to the communications field, and more specifically, to a semi-orthogonal transmission-based communication method and a device.
In a Long Term Evolution (LTE)/Long Term Evolution Advanced (LTE-A) communications system, a downlink multiple access mode is usually an orthogonal frequency division multiple access (OFDMA) mode. A main feature of the orthogonal frequency division multiple access mode is that different user equipments (UEs) use different time-frequency resources to ensure no interference to received signals of the different UEs, and implement simple reception on a UE side. However, when communication is performed in the orthogonal frequency division multiple access mode, utilization of time-frequency resources is relatively low, resulting in limitation on an overall transmission rate of a communications system.
In a non-orthogonal multiple access (NOMA) transmission mode, information of multiple UEs can be transmitted on a single resource element (RE). Compared with OFDMA, NOMA improves an overall transmission rate of a system. Further, in a semi-orthogonal multiple access (SOMA) transmission mode, a property of Gray code in an existing modulation scheme (or constellation diagram) is used, so that a receiver of UE may use a simple receive algorithm, to further improve system performance.
權(quán)利要求
What is claimed is:1. A semi-orthogonal transmission-based communication method, comprising:receiving, by a first user equipment, downlink control information sent by a base station, wherein the downlink control information comprises a downlink control parameter of the first user equipment and power allocation information, wherein the power allocation information indicates a currently used first signal power allocation of the first user equipment and further indicates a second signal power allocation of a second user equipment, wherein the downlink control parameter of the first user equipment comprises a modulation scheme of the first user equipment; receiving, by the first user equipment, a data signal of an associated user equipment group that is sent by the base station, wherein the data signal of the associated user equipment group comprises a data signal of the first user equipment and a data signal of the second user equipment; determining, by the first user equipment, the first signal power allocation and the second signal power allocation according to the power allocation information and a preconfigured power allocation comparison table, wherein the first signal power allocation is a signal power of the first user equipment divided by a total signal power, and wherein the second signal power allocation is a signal power of the second user equipment divided by the total signal power, wherein the preconfigured power allocation comparison table comprises a correspondence between the first signal power allocation, the second signal power allocation and a modulation scheme combination, and wherein the modulation scheme combination comprises a combination relationship between a modulation scheme of the first user equipment and a modulation scheme of the second user equipment; and determining, by the first user equipment, the data signal of the first user equipment according to the downlink control information, the first signal power allocation and the second signal power allocation, and the data signal of the associated user equipment group. 2. The method of claim 1 , wherein the downlink control information further comprises at least one of modulation scheme information of second user equipment, an identifier of the first user equipment, or pairing information, wherein the identifier indicates that the first user equipment is cell-center user equipment, and wherein the pairing information indicates whether the first user equipment is paired user equipment. 3. A semi-orthogonal transmission-based communication method, comprising:sending, by a base station, downlink control information to first user equipment, wherein the downlink control information comprises a downlink control parameter of the first user equipment, and power allocation information, wherein the power allocation information indicates a currently used first signal power allocation of the first user equipment and further indicates a second signal power allocation of a second user equipment, wherein the first signal power allocation is a signal power of the first user equipment divided by a total signal power, and wherein the second signal power allocation is a signal power of the second user equipment divided by the total signal power, wherein the power allocation information is predefined in a preconfigured power allocation comparison table, wherein the preconfigured power allocation comparison table comprises a correspondence between a first signal power allocation and a second signal power allocation and a modulation scheme combination, and wherein the modulation scheme combination comprises a combination relationship between a modulation scheme of the first user equipment and a modulation scheme of the second user equipment; and sending, by the base station, a data signal of an associated user equipment group to the first user equipment, wherein the data signal of the associated user equipment group comprises a data signal of the first user equipment and a data signal of the second user equipment. 4. The method according to claim 3 , wherein the method further comprises:sending, by the base station, the data signal of the associated user equipment group to the second user equipment. 5. The method according to claim 3 , wherein information comprised in the downlink control information is coded by using a joint coding mode. 6. The method of claim 3 , wherein the downlink control information further comprises at least one of modulation scheme information of second user equipment, an identifier of the first user equipment, or pairing information, wherein the identifier indicates that the first user equipment is cell-center user equipment, and wherein the pairing information indicates whether the first user equipment is paired user equipment. 7. User equipment, comprising:a processor; and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to:receive downlink control information sent by a base station, wherein the downlink control information comprises a downlink control parameter of the user equipment, and power allocation information, wherein the power allocation information indicates a currently used a first signal power allocation of the user equipment and further indicates a second signal power allocation of a second user equipment, wherein the downlink control parameter of the user equipment comprises a modulation scheme of the user equipment; receive a data signal of an associated user equipment group that is sent by the base station, wherein the data signal of the associated user equipment group comprises a data signal of the user equipment and a data signal of the second user equipment; determine the first signal power allocation and the second signal power allocation according to the power allocation information and a preconfigured power allocation comparison table, wherein the first signal power allocation is a signal power of the user equipment divided by a total signal power, and wherein the second signal power allocation is a signal power of the second user equipment divided by the total signal power, wherein the preconfigured power allocation comparison table comprises a correspondence between a first signal power allocation and a second signal power allocation and a modulation scheme combination, and wherein the modulation scheme combination comprises a combination relationship between a modulation scheme of the user equipment and a modulation scheme of the second user equipment; and determine the data signal of the user equipment according to the downlink control information, the first signal power allocation and second signal power allocation, and the data signal of the associated user equipment group. 8. The user equipment of claim 7 , wherein the downlink control information further comprises at least one of modulation scheme information of the second user equipment, an identifier of the user equipment, or pairing information, wherein the identifier indicates that the user equipment is cell-center user equipment, and wherein the pairing information indicates whether the user equipment is paired user equipment. 9. A base station, comprising:a processor; and a non-transitory computer-readable storage medium storing a program to be executed by the processor, the program including instructions to: send downlink control information to first user equipment, wherein the downlink control information comprises a downlink control parameter of the first user equipment, and power allocation information, wherein the power allocation information indicates a currently used first signal power allocation of the first user equipment and further indicates a second signal power allocation of a second user equipment, wherein the first signal power allocation is a signal power of the first user equipment divided by a total signal power, and wherein the second signal power allocation is a signal power of the second user equipment divided by the total signal power, wherein the power allocation information is predefined in a preconfigured power allocation comparison table, wherein the preconfigured power allocation comparison table comprises a correspondence between a first signal power allocation and a second signal power allocation and a modulation scheme combination, and wherein the modulation scheme combination comprises a combination relationship between a modulation scheme of the first user equipment and a modulation scheme of the second user equipment; and send a data signal of an associated user equipment group to the first user equipment, wherein the data signal of the associated user equipment group comprises a data signal of the first user equipment and a data signal of the second user equipment. 10. The base station according to claim 9 , wherein the instructions include instructions to send the data signal of the associated user equipment group to the second user equipment. 11. The base station of claim 9 , wherein the downlink control information further comprises at least one of modulation scheme information of second user equipment, an identifier of the first user equipment, or pairing information, wherein the identifier indicates that the first user equipment is cell-center user equipment, and wherein the pairing information indicates whether the first user equipment is paired user equipment.
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