System and method for scalable digital communications with adaptive system parameters
地域：
Shenzhen
摘要
A method for operating an adapting device includes selecting a first access mode out of a plurality of access modes for a first transmission between a first communications device and a second communications device, wherein the selection of the first access mode is made in accordance with an access mode criterion, and at least one of communications system information, and user equipment information, and determining sparse code multiple access (SCMA) parameters from the first access mode in accordance with a SCMA parameter mapping rule. The method also includes providing information about the first access mode to at least one of the first communications device and the second communications device.
說(shuō)明書
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This application is a continuation of U.S. patent application Ser. No. 14/453,875, filed Aug. 7, 2014, entitled “System and Method for Scalable Digital Communications with Adaptive System Parameters,” which claims the benefit of U.S. Provisional Application No. 61/863,213, filed on Aug. 7, 2013, entitled “System and Method for Scalable Sparse Code Multiple Access with Adaptive System Parameters,” which applications are hereby incorporated herein by reference.
The present disclosure relates generally to digital communications, and more particularly to a system and method for scalable digital communications with adaptive system parameters.
Different radio access techniques exist for different purposes or applications. However, there is no general framework and mechanism to put them under the same umbrella and switch among them depending on the requirements of particular situations. These techniques include sparse code multiple access (SCMA), multicarrier modulations such as orthogonal frequency division multiplexing (OFDM), downlink (DL) user superposition, non-orthogonal multiple access (NOMA), code division multiple access (CDMA), uplink (UL) multi-user multiple-input multiple-output (MU-MIMO), low density signature (LDS).
Example embodiments of the present disclosure which provide a system and method for scalable digital communications with adaptive system parameters.
權(quán)利要求
What is claimed is:1. A method for a network device, the method comprising:transmitting, to a user equipment (UE), first information about at least one parameter indicating a first multiple access mode out of a plurality of multiple access modes, for a first contention-based uplink transmission between the network device and the UE, the at least one parameter including a number of nonzero elements in a signature or a codebook; and transmitting, to the UE, second information about the at least one parameter indicating a second multiple access mode out of the plurality of multiple access modes, for a second contention-based uplink transmission between the network device and the UE, the second multiple access mode being a sparse code multiple access mode having a larger spreading factor than the first multiple access mode, the larger spreading factor being configured to support a larger number of contention-based users. 2. The method of claim 1 , wherein the first information about the at least one parameter is transmitted using one of semi-static messaging or dynamic messaging. 3. The method of claim 1 , further comprising selecting the first multiple access mode for the first contention-based uplink transmission and the second multiple access mode for the second contention-based uplink transmission in accordance with at least one of a UE capability or a UE requirement. 4. The method of claim 1 , further comprising determining the first information about the at least one parameter in accordance with a parameter mapping rule, wherein the parameter mapping rule defines a relationship between modes in the plurality of multiple access modes and values of the at least one parameter. 5. The method of claim 1 , wherein the plurality of multiple access modes comprises an orthogonal frequency division multiple access mode. 6. The method of claim 1 , wherein the at least one parameter further comprises at least one of a number of codewords in a codebook, a spreading factor, a number of layers, signatures or codebooks, a number of overlapping elements of any two distinct codebooks, an overloading factor, or a maximum number of codewords colliding at a tone. 7. The method of claim 1 , wherein the first information about the at least one parameter comprises a first value of the at least one parameter and wherein the second information about the at least one parameter comprises a second value of the at least one parameter. 8. The method of claim 1 , wherein the first information about the at least one parameter comprises an indicator of the first multiple access mode. 9. The method of claim 1 , further comprising:selecting the first multiple access mode and the second multiple access mode out of the plurality of multiple access modes, wherein the selection is determined in accordance with an access mode criterion and at least one of communications system information and UE information; and determining the at least one parameter for the first multiple access mode and the second multiple access mode in accordance with a mapping rule. 10. The method of claim 1 , wherein the second multiple access mode has a larger number of non-zero elements in each codeword of a codebook than the first multiple access mode. 11. The method of claim 10 , wherein the second multiple access mode has a limit of a maximum number of layers. 12. A network device comprising:a non-transitory memory storage comprising instructions; and a processor in communication with the non-transitory memory storage, wherein the processor executes the instructions to:transmit, to a user equipment (UE), first information about at least one parameter indicating a first multiple access mode out of a plurality of multiple access modes, for a first contention-based uplink transmission between the network device and the UE, the at least one parameter including a number of nonzero elements in a signature or a codebook; and transmit, to the UE, second information about the at least one parameter indicating a second multiple access mode out of the plurality of multiple access modes, for a second contention-based uplink transmission between the network device and the UE, the second multiple access mode being a sparse code multiple access mode having a larger spreading factor than the first multiple access mode, the larger spreading factor being configured to support a larger number of contention-based users. 13. The network device of claim 12 , wherein the processor executes the instructions to select the first multiple access mode for the first contention-based uplink transmission and the second multiple access mode for the second contention-based uplink transmission in accordance with at least one of a UE capability or a UE requirement. 14. The network device of claim 12 , wherein the processor executes the instructions to select the first multiple access mode for the first contention-based uplink transmission. 15. The network device of claim 12 , wherein the first information about the at least one parameter comprises a first value of the at least one parameter and wherein the second information about the at least one parameter comprises a second value of the at least one parameter. 16. The network device of claim 12 , wherein the at least one parameter, further comprises at least one of a number of codewords in a codebook, a spreading factor, a number of layers, codebooks or signatures, a number of overlapping elements of any two distinct codebooks, an overloading factor, or a maximum number of codewords colliding at a tone. 17. The method of claim 1 , wherein the second multiple access mode is for a single cell and UE type. 18. The network device of claim 12 , wherein the processor further executes the instructions to:select the first multiple access mode and the second multiple access mode out of the plurality of multiple access modes, wherein the selection is determined in accordance with an access mode criterion and at least one of communications system information and UE information; and determine the at least one parameter for the first multiple access mode and the second multiple access mode in accordance with a mapping rule. 19. The network device of claim 12 , wherein the second multiple access mode has a larger number of non-zero elements in each codeword of a codebook than the first multiple access mode. 20. The network device of claim 19 , wherein the second multiple access mode has a limit of a maximum number of layers. 21. A method for a network device, the method comprising:selecting, by the network device, a first multiple access mode out of a plurality of multiple access modes for a first contention-based uplink transmission between the network device and a user equipment (UE), the plurality of multiple access modes including at least the first multiple access mode and a second multiple access mode, the second multiple access mode being a sparse code multiple access mode having a larger spreading factor than the first multiple access mode, the larger spreading factor being configured to support a larger number of contention-based users; and transmitting, by the network device, information about the first multiple access mode to the UE, the information including at least a number of nonzero elements in a signature or a codebook. 22. The method of claim 21 , wherein the selection is made in accordance with UE information comprising at least one of a UE capability or a UE requirement. 23. The method of claim 21 , wherein the information about the first multiple access mode comprises a first value of at least one parameter associated with the first multiple access mode. 24. The method of claim 23 , further comprising determining the first value of the at least one parameter in accordance with a parameter mapping rule, wherein the parameter mapping rule defines a relationship between modes in the plurality of multiple access modes and values of the at least one parameter. 25. The method of claim 21 , further comprising selecting the second multiple access mode out of the plurality of multiple access modes for second transmission between the network device and the UE and transmitting information about the second multiple access mode to the UE. 26. The method of claim 21 , wherein the information about the first multiple access mode further comprises at least one of a number of codewords in a codebook, a spreading factor, a number of layers, signatures or codebooks, a number of overlapping elements of any two distinct codebooks, an overloading factor, or a maximum number of codewords colliding at a tone. 27. A method for a user equipment (UE), the method comprising:receiving, from a network device, first information about at least one parameter indicating a first multiple access mode out of a plurality of multiple access modes, for a first contention-based uplink transmission between the UE and the network device, the at least one parameter including a number of nonzero elements in a signature or a codebook, and receiving, from the network device, second information about the at least one parameter indicating a second multiple access mode out of the plurality of multiple access modes, for a second contention-based uplink transmission between the UE and the network device, the second multiple access mode being a sparse code multiple access mode having a larger spreading factor than the first multiple access mode, the larger spreading factor being configured to support a larger number of contention-based users. 28. The method of claim 27 , wherein the plurality of multiple access modes comprises at least an orthogonal frequency division multiple access mode. 29. The method of claim 27 , wherein the at least one parameter further comprises at least one of a number of codewords in a codebook, a spreading factor, a number of layers, signatures or codebooks, a number of overlapping elements of any two distinct codebooks, an overloading factor, or a maximum number of codewords colliding at a tone. 30. The method of claim 27 , wherein the first information about the at least one parameter comprises a first value of the at least one parameter and wherein the second information about the at least one parameter comprises a second value of the at least one parameter. 31. The method of claim 27 , wherein the first information about the at least one parameter comprises an indicator of the first multiple access mode. 32. The method of claim 27 , wherein the first multiple access mode and the second multiple access mode are selected out of the plurality of multiple access modes, wherein the selection is determined in accordance with an access mode criterion and at least one of communications system information and UE information, and the at least one parameter for the first multiple access mode and the second multiple access mode are determined in accordance with a mapping rule. 33. The method of claim 27 , wherein the second multiple access mode has a larger number of non-zero elements in each codeword of a codebook than the first multiple access mode. 34. The method of claim 33 , wherein the second multiple access mode has a limit of a maximum number of layers. 35. A network device comprising:a non-transitory memory storage comprising instructions; and a processor in communication with the non-transitory memory storage, wherein the processor executes the instructions to:select a first multiple access mode out of a plurality of multiple access modes for a first contention-based uplink transmission between the network device and a user equipment (UE), wherein the plurality of multiple access modes includes at least the first multiple access mode and a second multiple access mode, the second multiple access mode being a sparse code multiple access mode having a larger spreading factor than the first multiple access mode, the larger spreading factor being configured to support a larger number of contention-based users; and transmit information about the first multiple access mode to the UE, the information including at least a number of nonzero elements in a signature or a codebook. 36. A user equipment (UE) comprising:a non-transitory memory storage comprising instructions; and a processor in communication with the non-transitory memory storage, wherein the processor executes the instructions to:receive, from a network device, first information about at least one parameter indicating a first multiple access mode out of a plurality of multiple access modes, for a first contention-based uplink transmission between the UE and the network device, the at least one parameter including a number of nonzero elements in a signature or a codebook, and receive, from the network device, second information about the at least one parameter indicating a second multiple access mode out of the plurality of multiple access modes, for a second contention-based uplink transmission between the UE and the network device, the second multiple access mode being a sparse code multiple access mode having a larger spreading factor than the first multiple access mode, the larger spreading factor being configured to support a larger number of contention-based users. 37. The UE of claim 36 , wherein the first information about the at least one parameter is received using one of semi-static messaging or dynamic messaging. 38. The UE of claim 36 , wherein the plurality of multiple access modes comprises at least an orthogonal frequency division multiple access mode. 39. The UE of claim 36 , wherein the at least one parameter further comprises at least one of a number of codewords in a codebook, a spreading factor, a number of layers, signatures or codebooks, a number of overlapping elements of any two distinct codebooks, an overloading factor, or a maximum number of codewords colliding at a tone. 40. The UE of claim 36 , wherein the first information about the at least one parameter comprises a first value of the at least one parameter and wherein the second information about the at least one parameter comprises a second value of the at least one parameter. 41. The UE of claim 36 , wherein the first information about the at least one parameter comprises an indicator of the first multiple access mode. 42. The UE of claim 36 , wherein the first multiple access mode and the second multiple access mode are selected out of the plurality of multiple access modes, wherein the selection is determined in accordance with an access mode criterion and at least one of communications system information and UE information, and the at least one parameter for the first multiple access mode and the second multiple access mode are determined in accordance with a mapping rule. 43. The UE of claim 36 , wherein the second multiple access mode has a larger number of non-zero elements in each codeword of a codebook than the first multiple access mode. 44. The UE of claim 43 , wherein the second multiple access mode has a limit of a maximum number of layers.
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