System and method for random access wireless communication

• US 9,338,790 B2
• Filed: 11/13/2013
• Issued: 05/10/2016
• Est. Priority Date: 11/14/2012
• Status: Expired due to Fees

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Hong, Tae Chul, Kim, Hee Wook
• Primary Examiner(s): Lai, Andrew
• Assistant Examiner(s): Lee, Andrew C
• Application Number:
  US14/079,056
• Publication Number:
  US 20140133475A1
• Time in Patent Office: 909 Days
• Field of Search: 370/252, 370/281, 370/328, 370/329, 370/332, 370/336, 370/338, 370/350, 455/440, 455/456.1, 455/456.2
• US Class Current: 1/1
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling
• CPC Class Codes: H04W 72/121 for groups of terminals or users
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A system and method for wireless communication that schedules a connection time of a terminal based on a delay time is provided. A base station of the system for wireless communication may include a delay time determiner to determine a delay time of a terminal, based on preamble information for a plurality of terminal groups based on location information of the terminal, and a scheduler to schedule a connection time for the terminal to connect to the base station, using the delay time.

Claims

1. A base station comprising:

a delay time determiner to determine a delay time of a terminal, using preamble information for a plurality of terminal groups based on information associated with a terminal location, wherein the delay time determiner receives the preamble information from the terminal, identifies a terminal group that corresponds to the preamble information, and identifies a delay time that corresponds to the terminal group as the delay time of the terminal;

a scheduler to schedule a connection time for the terminal to connect to a base station, using the delay time; and

a transceiver to transmit scheduling information comprising the scheduling to the terminal.

2. The base station of claim 1, wherein a terminal of the plurality of terminal groups is grouped based on a delay time related to a distance between the base station and the terminal of the plurality of terminal groups.

3. The base station of claim 1, wherein the connection time is scheduled through setting differing durations of time occupied by communication resources corresponding to the terminal, based on a terminal group including the terminal.

4. The base station of claim 1, wherein the scheduler sets, in proportion to the delay time, a duration of time occupied by communication resources corresponding to the terminal.

5. The base station of claim 1, wherein the scheduler allocates identical communication resources to a plurality of terminals for which respective delay times differ from one another.

6. A terminal comprising:

a preamble information selector to select preamble information, using information associated with a terminal location, wherein the preamble information selector identifies a delay time of the terminal based on information associated with a location of the terminal, identifies a terminal group corresponding to the terminal based on the delay time, and selects the preamble information corresponding to the terminal group; and

a transceiver to transmit the preamble information to a base station, and receive scheduling information corresponding to the preamble information from the base station, wherein the scheduling information comprises a connection time for the terminal to connect to the base station.

7. The terminal of claim 6, wherein the delay time occurs during communication between the terminal and the base station, and the preamble information selector identities the delay time using a distance between the terminal and the base station based on the information associated with the terminal location.

8. The terminal of claim 6, wherein a terminal of the terminal group is grouped based on a delay time related to a distance between the base station and the terminal of the terminal group.

9. The terminal of claim 6, wherein the transceiver performs wireless communication through connecting to the base station, based on the scheduling information.

10. A method for wireless communication, the method comprising:

determining a delay time of a terminal, using preamble information for a plurality of terminal groups based on information associated with a terminal location, wherein determining the delay time comprises;

receiving the preamble information from the terminal,

identifying a terminal group that corresponds to the preamble information, and

identifying a delay time that corresponds to the terminal group as the delay time of the terminal;

scheduling a connection time for the terminal to connect to a base station, using the delay time; and

transmitting scheduling information comprising the scheduling to the terminal.

11. The method of claim 10, wherein a terminal of the plurality of terminal groups is grouped based on a delay time related to a distance between the base station and the terminal of the plurality of terminal groups.

12. The method of claim 10, wherein the scheduling comprises:

setting differing durations of time occupied by communication resources corresponding to the terminal based on a terminal group including the terminal.

13. The method of claim 10, wherein the scheduling comprises:

setting, in proportion to the delay time, a duration of time occupied by communication resources corresponding to the terminal.

14. The method of claim 10, wherein the scheduling comprises:

allocating identical communication resources to a plurality of terminals for which respective delay times differ from one another.

15. A method for wireless communication, the method comprising:

identifying a delay time of a terminal based on information associated with a location of the terminal;

identifying a terminal group corresponding to the terminal based on the delay time;

selecting preamble information corresponding to the terminal group, using information on the location of the terminal; and

transmitting the preamble information, and receiving scheduling information corresponding to the preamble information from the base station, wherein the scheduling information comprises a connection time for the terminal to connect to the base station.

16. The method of claim 15, wherein the

delay time occurs during communication between the terminal and the base station, and identifying the delay time comprises using a distance between the terminal and the base station based on the information associated with the location of the terminal.

17. The method of claim 15, wherein a terminal of the terminal group is grouped based on a delay time related to a distance between the base station and the terminal of the terminal group.

18. The method of claim 15, further comprising:

performing wireless communication through connecting to the base station, based on the scheduling information.