Bandwidth request preamble sequence selection method and random access method

• US 9,025,519 B2
• Filed: 03/08/2010
• Issued: 05/05/2015
• Est. Priority Date: 03/06/2009
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Cho, Hee Jeong, Yuk, Young Soo, Ryu, Ki Seon, Park, Sung Ho, Chun, Jin Young, Kim, Yong Ho
• Primary Examiner(s): Sam, Phirin
• Assistant Examiner(s): VIDAL CARPIO, MARIELA
• Application Number:
  US13/254,711
• Publication Number:
  US 20110317626A1
• Time in Patent Office: 1,884 Days
• Field of Search: None
• US Class Current: 370/328
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04W 74/008 with additional processing of random access related information at receiving side
• CPC Class Codes: H04W 74/0833 Random access procedures, e.g. with 4-step access

Abstract

The present invention relates to a bandwidth request preamble sequence selecting method for bandwidth requests on a wireless access system, and to a random access procedure using the same. Also, the present invention relates to devices supporting the random access procedure. In one example of the present invention, the method for randomly accessing a wireless access system may comprise the steps of: receiving a first message containing a predefined bandwidth request index from a base station; selecting a bandwidth request preamble sequence from the predefined bandwidth request index on the basis if the properties of uplink data to be transmitted by a mobile terminal; transmitting a second message containing a predefined bandwidth request index to the base station; and transmitting the selected bandwidth request preamble sequence to the base station.

Claims

1. A method for performing random access in a wireless access system, the method performed by a mobile station and comprising:

receiving a dynamic service addition request (DSA-REQ) message requesting a creation of a service flow from a base station, the DSA-REQ message including a quality of service (QoS) parameter for the service flow and a bandwidth request (BR) index which is mapped to a BR size and a service type of the service flow;

transmitting a dynamic service addition response (DSA-RSP) message comprising the BR index to the base station;

transmitting a BR preamble sequence and a quick access message to the base station in order to perform the random access, wherein the BR preamble is selected based on the BR index; and

receiving, from the base station, a BR acknowledge A-MAP information element (RB ACK A-MAP IE) representing a reception status of at least the BR preamble sequence and the quick access message,

wherein the BR index is determined by considering the QoS parameter, and the BR size indicates a size of a requested bandwidth, and

wherein the quick access message comprises a station identifier (STID) identifying the mobile station.

2. The method according to claim 1,

wherein the quick access message further comprises the BR index.

3. A mobile station for performing random access in a wireless access system, the mobile station comprising:

a transmit module;

a receive module; and

a processor for controlling the random access,

wherein the processor is configured to;

receive, from a base station, a dynamic service addition request (DSA-REQ) message requesting a creation of a service flow by using the receive module, the DSA-REQ message including a quality of service (QoS) parameter for the service flow and a bandwidth request (BR) index which is mapped to a BR size and a service type of the service flow;

transmit a dynamic service addition response (DSA-RSP) message including the BR index to the base station by using the transmit module;

transmit a BR preamble sequence and a quick access message to the base station in order to perform the random access, wherein the BR preamble is selected based on the BR index; and

receive, from the base station, a BR acknowledge A-MAP information element (RB ACK A-MAP IE) representing a reception status of at least the BR preamble sequence and the quick access message by using the receive module,

wherein the BR index is determined by considering the QoS parameter, and the BR size indicates a size of a requested bandwidth, and

wherein the quick access message comprises a station identifier (STID) identifying the mobile station.

4. The mobile station according to claim 3,

wherein the quick access message further comprises the BR index.

5. A method for supporting a random access in a base station of a wireless access system, the method performed by the base station and comprising:

transmitting a dynamic service addition request (DSA-REQ) message to create a service flow to a mobile station, the DSA-REQ message including a quality of service (QoS) parameter for the service flow and a bandwidth request (BR) index which is mapped to a BR size and a service type of the service flow;

receiving a dynamic service addition response (DSA-RSP) message comprising the BR index from the mobile station in response to the DSA-REQ message;

receiving a BR preamble sequence and a quick access message from the mobile station which is received for performing the random access, wherein the BR preamble is selected based on the BR index; and

transmitting, to the mobile station, a BR acknowledge A-MAP information element (RB ACK A-MAP IE) representing a reception status of at least the BR preamble sequence and the quick access message,

wherein the BR index is determined by considering the QoS parameter, and the BR size indicates a size of a requested bandwidth, and

wherein the quick access message comprises a station identifier (STID) identifying a mobile station.

6. The method according to claim 5, wherein the base station receives a quick access message together with the BR preamble sequence, and

wherein the quick access message further comprises the BR index.

7. A base station for supporting a random access in a wireless access system, comprising:

a transmit module;

a receive module; and

a processor for controlling the random access,

wherein the processor is configured to;

transmit, to a mobile station, a dynamic service addition request (DSA-REQ) message to create a service flow by using the transmit module, the DSA-REQ message including a quality of service (QoS) parameter for the service flow and a bandwidth request (BR) index which is mapped to a BR size and a service flow type of the service flow;

receive a dynamic service addition response (DSA-RSP) message including the BR index from the mobile station in order to perform the random access by using the receive module;

receive a BR preamble sequence and a quick access message from the mobile station which is received for performing the random access, wherein the BR preamble is selected based on the BR index; and

transmit, to the mobile station, a BR acknowledge A-MAP information element (RB ACK A-MAP IE) representing a reception status of at least the BR preamble sequence and the quick access message,

wherein the BR index is determined by considering the QoS parameter, and the BR size indicates a size of a requested bandwidth, and

wherein the quick access message comprises a station identifier (STID) identifying a mobile station.

8. The base station according to claim 7,

wherein the quick access message further comprises the BR index.