Contention access control system and method

The method claim of 15 further comprising:

• adjusting a RACH parameter in response to said determination over the selected time interval whereby the UEs adjust their transmission power after receiving an adjusted value for said RACH parameter in accordance with that adjusted value;
• broadcasting said RACH power control parameter to the UEs;
• adjusting DP in response to said determination over the selected time interval whereby the UEs adjust their access rate to CUTS after receiving an adjusted value for DP in accordance with that adjusted value;
• and
• broadcasting DP upon which the UEs determine an access rate for transmitting in CUTSs.

A common station configured for use in a telecommunications system in which a plurality of User Equipments (UEs) communicate with the common station via communication signals having a system frame format with at least one commonly used time slot (CUTS) per frame which is available for common use by the UEs for transmitting code identified signals for a specific uplink channel, where the UEs select a code identifier from a plurality of identifiers and where a UE transmission with a selected code identifier in a selected CUTS will fail if another UE transmits with the same code identifier in the same CUTS or if the UE transmission lacks sufficient power, the common station comprising:

• a memory configured to store the number of successful and failed UE transmission in CUTSs per frame;
• processing circuitry configured to determine whether UE transmission in CUTSs succeed or fail and storing determination results as data in the memory;
• said processing circuitry further configured to adjust one or more communication parameters, including a dynamic persistence parameter (DP) or a power control parameter (R), based on the data stored in said memory;
• and
• means for broadcasting said adjusted communication parameters.

A telecommunications system comprising:

• a plurality of User Equipments (UEs);
• a common station configured to communicate with said UEs via communication signals having a system frame format with at least one commonly used time slot (CUTS) per frame which is available for common use by the UEs for transmitting code identified signals for a specific uplink channel, where the UEs select a code identifier from a plurality of identifiers and where a UE transmission with a selected code identifier in a selected CUTS will fail if another UE transmits with the same code identifier in the same CUTS or if the UE transmission lacks sufficient power;
• said common station including:
• a memory configured to store the number of successful and failed UE transmission in CUTSs per frame;
• and
• processing circuitry configured to determine whether UE transmission in CUTSs succeed or fail, to store the determination results as data in the memory and to adjust one or more communication parameters, including a dynamic persistence parameter (DP) or a power control parameter (R), based on the data stored in said memory;
• and said common station processing circuitry further configured to determine and store the number of successful and failed UE transmissions in CUTSs for multiple system frames spanning a selected time interval and to adjust R, upon which the UEs determine a power level for transmitting in CUTSs, based on stored data reflecting the determinations over the selected time interval.