Method and apparatus of requiring uplink resources for transmitting ranging request message in communication system

摘要

A method and an apparatus of requiring uplink resources for transmitting a ranging request message in a communication system are provided. The method includes allocating an uplink bandwidth from a base station, and fragmentizing a Ranging Request (RNG-REQ) message into plural fragmented RNG-REQ messages, when the allocated bandwidth does not accommodate an entire RNG-REQ message, requesting an additional uplink bandwidth by transmitting one fragmented RNG-REQ message, and allocating an requested additional uplink bandwidth from the base station and transmitting a next one fragmented RNG-REQ message.

主权项

1. A method for requesting uplink resources to transmit a ranging request message by a terminal in a mobile communication system, the method comprising:
receiving a first message comprising information of a first uplink bandwidth allocated for the terminal from a base station; fragmentizing a ranging request (RNG-REQ) message into plural fragmented RNG-REQ messages based on the allocated first uplink bandwidth, if the allocated first uplink bandwidth does not accommodate an entire RNG-REQ message; requesting an additional uplink bandwidth through one of a bandwidth request without station id (STID) header and a piggybacked bandwidth request extended header (PBREH); and receiving a second message comprising information of an additional uplink (UL) bandwidth allocated from the terminal, from the base station, wherein the additional uplink bandwidth is allocated based on a random access identifier used for the first uplink bandwidth allocation, and wherein the random access identifier is determined by concatenating least significant bit (LSB) n-bits of a superframe number, a frame index, a ranging code index, and a ranging opportunity index.