Method and system for random access packet channel request
AssigneeKoninklijke Philips Electronics N.V.
InventorsTimothy J. Moulsley, Bernard Hunt
Life of this patent
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Abstract
A radio communication system has a random access channel for the transmission of data (214) from a secondary station to a primary station. Such a channel is intended for use by secondary stations having data (214) to transmit to a primary station while not actually engaged in a call. By enabling access requests (202) to be transmitted with a greater range of possible signatures, a much greater number of degrees of freedom is available to a secondary station requesting access to a random access channel. This enables significantly improved efficiency of resource allocation by increasing the amount of information transmitted to the primary station by the access request (202).
Claims13
A radio communication system, comprising:
- a primary station;
- a secondary station;
- a random access channel for transmissions from the secondary station to the primary station;
- wherein the secondary station includes means for requesting allocation of a random access channel resource by transmission of an access preamble encoded with a first signature selected from a first set of signatures;
- and
- wherein the primary station includes means for receiving the access preamble, means for determining the first signature, and means for transmitting an access acknowledgement encoded with a second signature selected from a second set of signatures indicating whether the requested resource is available;
- wherein the choice of first signature provides further information regarding the resource allocation request;
- and
- wherein each signature of the second set corresponds to a plurality of signatures in the first set.
A primary station for use in a radio communication system having a random access channel for transmissions from a secondary station to the primary station, the primary station comprising:
- means for receiving an access preamble transmitted by the secondary station, which preamble is encoded with a first signature selected from a first set of signatures;
- means for determining the first signature;
- means for determining from the access preamble which random access channel resource the secondary station requests to be allocated;
- means for transmitting an access acknowledgement encoded with a second signature selected from a second set of signatures indicating whether the requested resource is available,
- wherein the choice of first signature provides further information regarding the resource allocation request;
- and
- wherein each signature of the second set corresponds to a plurality of signatures in the first set.
A secondary station for use in a radio communication system having a random access channel for transmissions to a primary station, the secondary station comprising:
- means for requesting allocation of a random access channel resource by transmission of an access preamble encoded with a first signature selected from a first set of signatures;
- means for receiving an access acknowledgement encoded with a second signature selected from a second set of signatures indicating whether the requested resource is available;
- wherein the choice of first signature provides further information regarding the resource allocanon request;
- and
- wherein each signature of the second set corresponds to a plurality of signatures in the first set.
A method of operating a radio communication system having a random access channel for transmissions from a secondary station to a primary station, the method comprising:
- operating the secondary station to request an allocation of a random access channel resource by transmission of an access preamble encoded with a first signature selected from a first set of signatures;
- operating the primary station to receive the access preamble;
- and
- determining the first signature and transmitting an access acknowledgement encoded with a second signature selected from a second set of signatures indicating whether the requested resource is available,
- wherein the choice of first signature provides further information regarding the resource allocation request, and
- wherein each signature of the second set corresponds to a plurality of signatures in the first set.
Dependencies are inferred from the claim text.