Data transmission method for performing full-duplex communications and base station using the same

• US 10,044,491 B2
• Filed: 07/14/2016
• Issued: 08/07/2018
• Est. Priority Date: 03/14/2016
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Hsu, Kai-Cheng, Wei, Hung-Yu, Lin, Ching-Ju
• Primary Examiner(s): Patel, Jay P
• Application Number:
  US15/210,839
• Publication Number:
  US 20170264418A1
• Time in Patent Office: 754 Days
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/336 Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
• CPC Class Codes: H04J 11/004 using regenerative subtractive interference cancellation
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 52/24 using SIR [Signal to Interference Ratio] or other wireless path parameters
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/245 taking into account received signal strength
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range

Abstract

In an embodiment, a base station (BS) receives one or more first data transmitting from at least one of one or more transmitting user equipments (UEs). The BS transmits a message including assistance parameters for performing a full-duplex data transmission, to at least one of one or more receiving UEs, wherein the parameters are associated with information of reducing an interference from the at least one of the transmitting UEs. And, the BS transmits one or more second data including the one or more first data to the at least one of the receiving UEs. Wherein, the receiving UEs and the transmitting UEs respectively include at least one of: one or more half-duplex UEs, one or more full-duplex UEs, or any combination of two or more of the half-duplex UEs and the full-duplex UEs.

Claims

1. A data transmission method for performing full-duplex communications, comprising:

receiving, by a base station (BS), one or more first data transmitting from at least one of one or more transmitting user equipments (UEs);

transmitting, by the BS, a message comprising a plurality of assistance parameters for performing a full-duplex data transmission, to at least one of one or more receiving UEs, wherein the plurality of assistance parameters are associated with information of reducing an interference from the at least one of the one or more transmitting UEs; and

transmitting, by the BS, one or more second data comprising the one or more first data to the at least one of the one or more receiving UEs;

wherein the one or more receiving UEs and the one or more transmitting UEs respectively comprise at least one of;

one or more half-duplex UEs, one or more full-duplex UEs, or any combination of two or more of the one or more half-duplex UEs and the one or more full-duplex UEs,

wherein the plurality of assistance parameters include a processing type of reducing said interference, and wherein the processing type indicates an IN-type transmission or a SIC-type transmission.

2. The data transmission method of claim 1, wherein the plurality of assistance parameters further include a power control factor, wherein if said processing type is the IN-type transmission, the power control factor is a power control factor of each of the one or more transmitting UEs, and wherein if said processing type is the SIC-type transmission, the power control factor is a power control factor of the BS.

3. The data transmission method of claim 2, wherein for both of a number of the one or more receiving UEs and a number of the one or more transmitting UEs are two or more, said processing type is set to the IN-type transmission by the BS.

4. The data transmission method of claim 2, wherein for both of a number of the one or more receiving UEs and a number of the one or more transmitting UEs are one, and said one of the one or more receiving UEs does not have a successive interference cancellation (SIC) decoding ability, said processing type is set to the IN-type transmission by the BS.

5. The data transmission method of claim 2, wherein for said processing type is the IN-type transmission, the one or more second data the BS transmits further include an interference nulling signal.

6. The data transmission method of claim 2, further comprising:

deciding said processing type, by the BS, based on a number of the one or more transmitting UEs, a number of the one or more receiving UEs, a successive interference cancellation (SIC) decoding ability of each of the one or more receiving UEs, and a comparison result of a corresponding system throughput of each of a plurality of candidates of said processing type.

7. The data transmission method of claim 6, wherein said corresponding system throughput of each of the plurality of candidates is calculated by the BS based on a signal to interference plus noise ratio (SINR) of each of the one or more transmitting UEs, and a SINR of each of the one or more receiving UEs.

8. The data transmission method of claim 7, wherein for said processing type is the IN-type transmission, the SINR of each of the one or more transmitting UEs and the SINR of each of the one or more receiving UEs are respectively based on a channel strength of each of the one or more transmitting UEs, a transmission power of each of the one or more transmitting UEs and the power control factor of each of the one or more transmitting UEs, and the SINR of each of the one or more receiving UEs is further based on a processing matrix of a signal phase and amplitude control, a channel strength of each of the one or more receiving UEs, a channel strength between each of the one or more transmitting UEs and each of the one or more receiving UEs, and a transmission power of the BS.

9. The data transmission method of claim 6, wherein said processing type is set to the SIC-type transmission by the BS if both the number of the one or more receiving UEs and the number of the one or more transmitting UEs are one, said one of the one or more receiving UEs has the SIC decoding ability, and the corresponding system throughput of the SIC-type transmission is a highest among the plurality of candidates of said processing type, otherwise said processing type is set to the IN-type transmission by the BS.

10. The data transmission method of claim 9, wherein said corresponding system throughput of each of the plurality of candidates is calculated by the BS based on a signal to interference plus noise ratio (SINR) of said one of the one or more transmitting UEs, and a SINR of said one of the one or more receiving UEs.

11. The data transmission method of claim 10, wherein for said processing type is the SIC-type transmission, the SINR of said one of the one or more transmitting UEs and the SINR of each of the one or more receiving UEs are respectively based on a channel strength of each of the one or more transmitting UEs, a channel strength of each of the one or more receiving UEs, a channel strength between each of the one or more transmitting UEs and each of the one or more receiving UEs, and a transmission power of each of the one or more transmitting UEs.

12. A base station (BS) for performing full-duplex communications, comprising:

a transceiver unit, comprising one or more antennas, and configured for transmitting and receiving; and

a processor coupled to the transceiver unit, and configured to;

receiving, via the transceiver unit, one or more first data transmitting from at least one of one or more transmitting user equipments (UEs)

transmitting, via the transceiver unit, a message comprising a plurality of assistance parameters for performing a full-duplex data transmission, to at least one of one or more receiving UEs, wherein the plurality of assistance parameters are associated with information of reducing an interference from the one or more transmitting UEs; and

transmitting, via the transceiver unit, one or more second data comprising the one or more first data, to the at least one of the one or more receiving UEs,

wherein the one or more receiving UEs and the one or more transmitting UEs respectively comprise at least one of;

one or more half-duplex UEs, one or more full-duplex UEs, or any combination of two or more of the one or more half-duplex UEs and the one or more full-duplex UEs,

wherein the plurality of assistance parameters include a processing type of reducing said interference, and wherein the processing type indicates an IN-type transmission or a SIC-type transmission.

13. The base station of claim 12, wherein the plurality of assistance parameters further include a power control factor, wherein if said processing type is the IN-type transmission, the power control factor is a power control factor of each of the one or more transmitting UEs, and wherein if said processing type is the SIC-type transmission, the power control factor is a power control factor of the BS.

14. The base station of claim 13, wherein for both of a number of the one or more receiving UEs and a number of the one or more transmitting UEs are two or more, said processing type is set to the IN-type transmission by the processor.

15. The base station of claim 13, wherein for both of a number of the one or more receiving UEs and a number of the one or more transmitting UEs are one, and said one of the one or more receiving UEs does not have a successive interference cancellation (SIC) decoding ability, said processing type is set to the IN-type transmission by the processor.

16. The base station of claim 13, wherein for said processing type is the IN-type transmission, the one or more second data the BS transmits further include an interference nulling signal.

17. The base station of claim 13, wherein the processor is further configured to:

decide said processing type based on a number of the one or more transmitting UEs, a number of the one or more receiving UEs, a successive interference cancellation (SIC) decoding ability of each of the one or more receiving UEs, and a comparison result of a corresponding system throughput of each of a plurality of candidates of said processing type.

18. The base station of claim 17, wherein said corresponding system throughput of each of the plurality of candidates is calculated by the processor respectively based on a signal to interference plus noise ratio (SINR) of each of the one or more transmitting UEs, and a SINR of each of the one or more receiving UEs.

19. The base station of claim 18, wherein for said processing type is the IN-type transmission, the SINR of each of the one or more transmitting UEs and the SINR of each of the one or more receiving UEs are respectively based on a channel strength of each of the one or more transmitting UEs, a transmission power of each of the one or more transmitting UEs and the power control factor of each of the one or more transmitting UEs, and the SINR of each of the one or more receiving UEs is further based on a processing matrix of a signal phase and amplitude control, a channel strength of each of the one or more receiving UEs, a channel strength between each of the one or more transmitting UEs and each of the one or more receiving UEs, and a transmission power of the BS.

20. The base station of claim 17, wherein said processing type is set to the SIC-type transmission by the processor if both the number of the one or more receiving UEs and the number of the one or more transmitting UEs are one, said one of the one or more receiving UEs has the SIC decoding ability, and the corresponding system throughput of the SIC-type transmission is a highest among the candidates of said processing type, otherwise said processing type is set to the IN-type transmission by the processor.

21. The base station of claim 20, wherein said corresponding system throughput of each of the plurality of candidates is calculated by the processor based on a signal to interference plus noise ratio (SINR) of said one of the one or more transmitting UEs, and a SINR of said one of the one or more receiving UEs.

22. The base station of claim 21, wherein for said processing type is the SIC-type transmission, the SINR of said one of the one or more transmitting UEs and the SINR of each of the one or more receiving UEs are respectively based on a channel strength of each of the one or more transmitting UEs, a channel strength of each of the one or more receiving UEs, a channel strength between each of the one or more transmitting UEs and each of the one or more receiving UEs, and a transmission power of each of the one or more transmitting UEs.