초록 ▼

The present invention, in illustrative embodiments, implements systems and methods for adjusting the timing of access requests in mobile communications systems, such as IS-95-A mobile telephone systems, to reduce the likelihood of request collisions--especially during periods of very high calling ra

The present invention, in illustrative embodiments, implements systems and methods for adjusting the timing of access requests in mobile communications systems, such as IS-95-A mobile telephone systems, to reduce the likelihood of request collisions--especially during periods of very high calling rates. These embodiments employ measurements of access channel occupancy, as well as system operator inputs, to develop thresholds and parameter translations at a base station. Execution of control algorithms at a base station advantageously yields modified persistence test parameters sent to mobile stations. When overload conditions are present, these modified parameters cause the mobile stations to experience variable delays through judicious control of persistence testing at the mobile stations.

대표청구항 ▼

1. A method for variably delaying access requests over at least one access channel from each of a plurality of terminals to a shared resource, origination of access requests at said terminals being subject to a pseudo-random delay characterized by a first parameter, the method comprising generati

1. A method for variably delaying access requests over at least one access channel from each of a plurality of terminals to a shared resource, origination of access requests at said terminals being subject to a pseudo-random delay characterized by a first parameter, the method comprising generating one or more occupancy signals reflecting the relative occupancy of said access channels, based on said occupancy signals, generating an adjustment signal representing a modification of said first parameter, and making said adjustment signal available to at least some of said terminals, wherein each of said channels is arranged to receive messages in sequential access slots, each of said slots comprising a plurality of frames, each of said messages comprising a message preamble and a message capsule, and said generating of said one or more occupancy signals reflecting the relative occupancy of said access channels comprises determining for each access channel the % interval occupancy in accordance with % Interval Occupancy=[M×(4+MAX_CAP--SZ+PAM--SZ)%,