Apparatus and method for random access in wireless communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsKang-Gyu Lee, Jeong-Hoon Park
Life of this patent
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Abstract
An apparatus and method for random access in a wireless communication system are provided. In the method, a random access response message is received. The random access response message is analyzed to determine a status of a random access process. A count variable value is updated according to the status. And the count variable value is compared with at least one reference value to determine a random access period. By adaptively changing the period of periodic ranging in a wireless communication system, the probability of success is increased while the waste of resources is decreased.
Claims21
An apparatus for random access in a wireless communication system, the apparatus comprising:
- a message analyzer for analyzing a random access response message;
- a period calculator for determining a status of a random access process according to the analysis, for updating a count variable value by increasing or decreasing the count variable value by a numerical value according to the status, for comparing the count variable value with at least one of an upper reference value and a lower reference value to determine a random access period, for decreasing the random access period if the count variable value reaches the upper reference value, and for increasing the random access period if the count variable value reaches the lower reference value;
- and
- a controller for controlling a next random access process according to the determined random access period.
A method for random access in a wireless communication system, the method comprising:
- receiving a random access response message;
- analyzing the random access response message to determine a status of a random access process;
- updating a count variable value by increasing or decreasing the count variable value by a numerical value according to the status;
- determining a random access period by comparing the count variable value with at least one of an upper reference value or a lower reference value;
- and
- decreasing the random access period if the count variable value reaches the upper reference value, and increasing the random access period if the count variable value reaches the lower reference value.
A method for periodic ranging in a wireless communication system, the method comprising:
- transmitting a periodic ranging code from a mobile station to a base station;
- upon receipt of the ranging code from the mobile station, comparing a time offset of the ranging code with a preset error range, determining a ranging status according to the comparison result, and transmitting a ranging response message containing the ranging status from the base station to the mobile station;
- and
- upon receipt of the ranging response message from the base station, updating a count variable value according to the ranging status contained in the ranging response message and determining a ranging period by comparing the count variable value with at least one reference value,
- wherein the determining of the ranging period comprises:
- updating a count variable value according to the ranging status;
- comparing the count variable value with at least one of an upper reference value and a lower reference value;
- and
- decreasing the ranging period if the count variable value reaches the upper reference value, and increasing the ranging period if the count variable value reaches the lower reference value.
Dependencies are inferred from the claim text.