METHOD AND APPARATUS FOR CONFIGURING TRANSMISSION TIME INTERVAL IN MOBILE COMMUNICATION SYSTEM

• US 20160135182A1
• Filed: 11/11/2015
• Published: 05/12/2016
• Est. Priority Date: 11/11/2014
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: JUNG, Soojung, LEE, Anseok, CHO, Seungkwon, CHANG, Sung Cheol
• Granted Patent: US 10,404,441 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 5/0064 Rate requirement of the data, e.g. scalable bandwidth, data priority

Abstract

Disclosed herein is a base station of a mobile communication system configuring at least one low latency transmission time interval (TTI) within a length of at least one transmission symbol in a subframe including a plurality of transmission symbols and transmitting LL (low latency) TTI related information using a physical control format indicator channel (PCFICH) transmitted at a pre-defined transmission symbol position within the subframe.

Claims

1. A method for configuring a transmission time interval (TTI) in a base station of a mobile communication system, comprising:

configuring at least one LL (low latency) TTI with a length of at least one transmission symbol in a subframe including a plurality of transmission symbols; and

transmitting LL (low latency) TTI related information using a physical control format indicator channel (PCFICH) transmitted at a defined transmission symbol position within the subframe.

2. The method of claim 1, wherein:

the configuring at least one LL TTI includes configuring a control region and a data region within the LL TTI which are changed in units of LL TTI.

3. The method of claim 2, wherein:

the configuring at least one LL TTI further includes dividing the control region and the data region in the at least one LL TTI into a frequency domain or a time domain.

4. The method of claim 1, wherein:

the PCFICH includes control format indicator (CFI) information of 2 bits, and

the transmitting includes transmitting a TTI indicator representing the LL TTI using the CFI information.

5. The method of claim 4, wherein:

the transmitting further includes transmitting the number of transmission symbols within the LL TTI and configuration information of a control region and a data region within the LL TTI.

6. The method of claim 1, wherein:

the PCFICH includes CFI information of N bits larger than 2, and

the transmitting includes

transmitting the number of transmission symbols within the LL TTI using some of the N bits; and

transmitting configuration information of a control region and a data region within the LL TTI using at least some remaining unused bits of the N bits.

7. The method of claim 6, wherein:

the CFI information further includes duration in which the CFI information is applied.

8. The method of claim 6, wherein:

the configuration information of the control region and the data region further includes an indicator of 1 bit indicating a division scheme of the control region and the data region, and

the division scheme includes a division scheme in a frequency domain and a division scheme in a time domain.

9. The method of claim 1, wherein:

the transmitting includes;

indicating whether there is an enhanced PCFICH (ePCFICH) using the PCFICH; and

transmitting information related to the number of transmission symbols within the LL TTI and information related to configuration of a control region and a data region within the LL TTI using the ePCFICH.

10. The method of claim 9, wherein:

the information related to configuration of the control region and the data region includes bandwidth information occupied by the control region in the entire bandwidth or the number of transmission symbols for the control region among the number of total transmission symbols within the LL TTI depending on the number of total transmission symbols within the LL TTI.

11. An apparatus for configuring a transmission time interval in a mobile communication system, comprising:

a processor configuring at least one low latency transmission time interval (TTI) within a length of at least one transmission symbol in a subframe including a plurality of transmission symbols and indicating information about the at least one LL (low latency) TTI using CFI (control format indicator) information; and

a transceiver transmitting a PCFICH (physical control format indicator channel) carrying the CFI information at a predefined transmission symbol position within the subframe.

12. The apparatus of claim 11, wherein:

the CFI information consists of 2 bits, and

one of values represented by 2 bits is used as a TTI indicator indicating the LL TTI.

13. The apparatus of claim 12, wherein:

the processor transmits information related to the number of transmission symbols within the LL TTI and information related to configuration of a control region and a data region within the LL TTI through the transceiver.

14. The apparatus of claim 11, wherein:

the CFI information consists of N bits larger than 2, and

the processor indicates the number of transmission symbols within the LL TTI using some of the N bits and indicates configuration information of a control region and a data region within the LL TTI using at least some of the remaining unused bits of the N bits.

15. The apparatus of claim 14, wherein:

the processor indicates duration in which the CFI information is applied using other some of the remaining unused bits of the N bits.

16. The apparatus of claim 14, wherein:

the processor indicates a division scheme of the control region and the data region using other some of the remaining unused bits of the N bits, and

the division scheme includes a division scheme in a frequency domain and a division scheme in a time domain.

17. The apparatus of claim 11, wherein:

the processor indicates whether there is an enhanced PCFICH (ePCFICH) using the PCFICH and generates an enhanced CFI (eCFI) information including information related to the number of transmission symbols within the LL TTI and information related to configuration of a control region and a data region within the LL TTI, and

the transceiver transmits the ePCFICH carrying the eCFI information.

18. The apparatus of claim 17, wherein:

the information related to configuration of the control region and the data region includes bandwidth information occupied by the control region to the entire bandwidth or the number of transmission symbols for the control region among the number of total transmission symbols within the LL TTI depending on the number of total transmission symbols within the LL TTI.

19. The apparatus of claim 11, wherein:

the processor changes configuration of a control region and a data region within LL TTI in at least one LL TTI unit.

20. The apparatus of claim 11, wherein:

the processor identically configures a control region and a data region within the LL TTI during the at least one LL TTI, and

the number of LL TTIs within the subframe and the configurations of the control region and the data region within the LL TTI are changed for each subframe.