Method and device for transmitting data in unauthorized frequency band

• US 10,257,820 B2
• Filed: 08/20/2015
• Issued: 04/09/2019
• Est. Priority Date: 09/26/2014
• Status: Active Grant

• Current Assignee: Datang Mobile Communications Equipment Company Limited (China Information Communication Technology Group Co. Ltd.)
• Original Assignee: China Academy of Telecom Technology (China Information Communication Technology Group Co. Ltd.)
• Inventors: Wang, Jiaqing, Pan, Xueming, Xu, Weijie
• Primary Examiner(s): Mesfin, Yemane
• Assistant Examiner(s): Baron, Henry
• Application Number:
  US15/509,695
• Publication Number:
  US 20170303246A1
• Time in Patent Office: 1,328 Days
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0091 Signaling for the administration of the divided path
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal

Abstract

The present disclosure relates to the field of mobile communications technology. A Method and a device for transmitting data in an unauthorized frequency band are provided. The method includes: determining a starting position of to-be-transmitted data in a radio frame in the unauthorized frequency band; determining position indication information based on the starting position; and transmitting the position indication information, to enable a terminal to obtain the starting position of the to-be-transmitted data in the radio frame in the unauthorized frequency band based on the position indication information.

Claims

1. A method for transmitting data in an unauthorized frequency band, comprising:

determining a starting position of a control channel in a radio frame in the unauthorized frequency band;

determining position indication information based on the starting position; and

transmitting the position indication information, to enable a terminal to obtain, within the radio frame, the starting position of the control channel in the radio frame in the unauthorized frequency band based on the position indication information;

wherein the position indication information is a sequence agreed on by a network device and the terminal in advance;

a symbol carrying the sequence is located at a position before to-be-transmitted data in the radio frame in time domain and there are N symbols between the symbol carrying the sequence and symbols carrying the to-be-transmitted data, wherein the sequence occupies all of a bandwidth or a specified portion of the bandwidth in frequency domain and N is an integer equal to or larger than 0;

or

the sequence occupies a specified portion of the bandwidth, and a symbol carrying the sequence overlaps a starting symbol for transmitting the to-be-transmitted data.

2. A method for transmitting data in an unauthorized frequency band, comprising:

receiving, by a terminal, position indication information of a radio frame in an unauthorized frequency band, wherein the position indication information indicates a starting position of a control channel in the radio frame; and

determining, by the terminal within the radio frame, the starting position of the control channel in the radio frame in the unauthorized frequency band based on the position indication information;

wherein the position indication information is a sequence agreed on by a network device and the terminal;

wherein determining by the terminal the starting position of the control channel in the radio frame in the unauthorized frequency band based on the position indication information comprises;

determining, by the terminal, the sequence on a symbol in the radio frame that is located at a position before symbols carrying to-be-transmitted data and is N symbols away from the symbols carrying the to-be-transmitted data, wherein the sequence occupies all of a bandwidth or a specified portion of the bandwidth in frequency domain, and N is an integer equal to or larger than 0;

or

determining, by the terminal, the sequence on a starting symbol for transmitting the to-be-transmitted data, wherein the sequence occupies a specified portion of the bandwidth.

3. The method according to claim 2, wherein the position indication information is transmitted via a signaling, the signaling is carried on a specified symbol in the radio frame, and the specified symbol is agreed on by a network device and the terminal in advance.

4. The method according to claim 3, wherein receiving by the terminal the position indication information of the radio frame in the unauthorized frequency band comprises:

determining, by the terminal, the signaling based on a portion of a bandwidth of the specified symbol;

or

obtaining, by the terminal, the signaling from an auxiliary carrier in the unauthorized frequency band or from a main carrier in an authorized frequency band.

5. The method according to claim 2, wherein data is transmitted in a physical downlink shared channel (PDSCH) and an enhanced physical downlink control channel (ePDCCH) in the radio frame in a frequency division multiplexing manner, the PDSCH and the ePDCCH have an identical starting position and an identical ending position in time domain, and the starting position of the PDSCH and the ePDCCH in the time domain is located at any position in an L1/L2 control channel region of a complete subframe corresponding to the radio frame, or is located at any position outside the L1/L2 control channel region of the complete subframe corresponding to the radio frame.

6. The method according to claim 2, wherein data is transmitted in a control channel and a PDSCH in the radio frame in a time division multiplexing manner, the control channel is located at a position after the PDSCH, and the control channel comprises at least a physical downlink control channel (PDCCH) and a physical control format indicator channel (PCFICH).

7. The method according to claim 2, wherein the starting position of the control channel in the radio frame is a starting symbol of a PDSCH.

8. A network device, comprising:

a processor;

a memory connected to the processor via a bus interface and configured to store therein programs and data for the operation of the processor; and

a transceiver configured to receive and transmit data under control of the processor,

wherein in the case that the programs and data stored in the memory are called and executed by the processor, the processor is configured to;

determine a starting position of control channel in a radio frame in an unauthorized frequency band;

determine position indication information based on the starting position; and

transmit the position indication information, to enable a terminal to determine, within the radio frame, the starting position of the control channel in the radio frame in the unauthorized frequency band based on the position indication information;

wherein the position indication information is a sequence agreed on by the network device and the terminal;

a symbol carrying the sequence is located at a position before to-be-transmitted data in the radio frame in time domain and there are N symbols between the symbol carrying the sequence and symbols carrying the to-be-transmitted data, wherein the sequence occupies all of a bandwidth or a specified portion of the bandwidth in frequency domain, and N is an integer equal to or larger than 0;

or

the sequence occupies a specified portion of the bandwidth, and a symbol carrying the sequence overlaps a starting symbol for transmitting the to-be-transmitted data.

9. The network device according to claim 8, wherein the position indication information is transmitted via a signaling, the signaling is carried on a specified symbol in the radio frame, and the specified symbol is agreed on by the network device and the terminal in advance.

10. The network device according to claim 9, wherein the signaling occupies a portion of a bandwidth of the specified symbol;

or

the signaling is carried on an auxiliary carrier in the unauthorized frequency band, or is carried on a main carrier in an authorized frequency band.

11. The network device according to claim 8, wherein data is transmitted in a physical downlink shared channel (PDSCH) and an enhanced physical downlink control channel (ePDCCH) in the radio frame in a frequency division multiplexing manner, the PDSCH and the ePDCCH have an identical starting position and an identical ending position in time domain, and the starting position of the PDSCH and the ePDCCH in the time domain is located at any position in an L1/L2 control channel region of a complete subframe corresponding to the radio frame, or is located at any position outside the L1/L2 control channel region of the complete subframe corresponding to the radio frame.

12. The network device according to claim 8, wherein data is transmitted in a control channel and a PDSCH in the radio frame in a time division multiplexing manner, the control channel is located at a position after the PDSCH, and the control channel comprises at least a physical downlink control channel (PDCCH) and a physical control format indicator channel (PCFICH).

13. The network device according to claim 8, wherein the starting position of the control channel in the radio frame is a starting symbol of a PDSCH.

14. A terminal, comprising:

a processor;

a memory connected to the processor via a bus interface and configured to store therein programs and data for the operation of the processor; and

a transceiver, configured to receive and transmit data under control of the processor,

wherein in the case that the programs and data stored in the memory are called and executed by the processor, the processor is configured to;

receive position indication information of a radio frame in an unauthorized frequency band, wherein the position indication information indicates a starting position of a control channel in the radio frame; and

determine, within the radio frame, the starting position of the control channel in the radio frame in the unauthorized frequency band based on the position indication information;

wherein the position indication information is a sequence agreed on by a network device and the terminal; and

in the case that the programs and data stored in the memory are called and executed by the processor, the processor is further configured to;

determine the sequence on a symbol in the radio frame that is located at a position before symbols carrying to-be-transmitted data and is N symbols away from the symbols carrying the to-be-transmitted data, wherein the sequence occupies all of a bandwidth or a specified portion of the bandwidth in frequency domain, and N is an integer equal to or larger than 0;

or

determine the sequence on a starting symbol for transmitting the to-be-transmitted data, wherein the sequence occupies a specified portion of the bandwidth.

15. The terminal according to claim 14, wherein the position indication information is transmitted via a signaling, the signaling is carried on a specified symbol in the radio frame, and the specified symbol is agreed on by a network device and the terminal in advance.

16. The terminal according to claim 15, wherein in the case that the programs and data stored in the memory are called and executed by the processor, the processor is further configured to:

determine the signaling based on a portion of a bandwidth of the specified symbol;

or

obtain the signaling from an auxiliary carrier in the unauthorized frequency band or from a main carrier in an authorized frequency band.