Random access channel access and backoff mechanism
AssigneeInterDigital Technology Corporation
InventorsStephen G. Dick, Eldad Zeira
Life of this patent
Estimating the term…
Abstract
A base station transmits access control signals on a periodic basis having a first transmission rate. The base station transmits access control modification signals at a second transmission rate higher than the first transmission rate. The user equipment transmits an access attempt signal. The access attempt signal requests the base station to permit the user equipment access to the random access channel. The user equipment receives the transmitted access control signals and access modification signals. A wait period is determined based on in part the received access control signals and access control modification signals. In response to an unsuccessful access attempt, the user equipment delays transmitting a subsequent access attempt signal for the wait period.
Claims15
A method for controlling user equipment access to a random access channel in a wireless code division multiple access communication system, the method comprising:
- transmitting on a periodic basis having a first transmission rate from a base station access control signals;
- transmitting from the base station access control modification signals at a second transmission rate higher than the first transmission rate;
- transmitting from the user equipment an access attempt signal, the access attempt signal requesting the base station to permit the user equipment access to the random access channel;
- receiving at the user equipment the transmitted access control signals and access control modification signals;
- determining a wait period based on in part the received access control signals and access control modification signals;
- and
- in response to an unsuccessful access attempt to the random access channel, the user equipment delays transmitting a subsequent access attempt signal for the wait period.
A wireless code division multiple access communication system comprising:
- a base station having:
- means for transmitting on a period basis having a first transmission rate access control signals;
- and
- means for transmitting access control modification signals at a second transmission rate higher than the first transmission rate;
- and a user equipment having:
- means for transmitting an access attempt signal, the access attempt signal requesting the base station to permit the user equipment access to a random access channel;
- means for receiving the transmitted access control signals and access control modification signals;
- means for determining a wait period based on in part the received access control signals and access control modification signals;
- and
- means for delaying transmission of a subsequent access attempt signal for the wait period in response to an unsuccessful access attempt to the random access channel.
Dependencies are inferred from the claim text.