Layer 2 protocol for the random access channel and the access response channel
First Claim
1. A method for transmitting messages between mobile stations and a cellular switching system using multiple layer 2 frames, each carried within a channel burst, and providing a message delimiting capability within any specific layer 2 frame, comprising the steps of:
- dividing said specific frame into a plurality of fields;
identifying a type of frame in a frame type field;
placing information from two distinct messages in at least one data field;
identifying the end of a first message and the beginning of a second message in an end of message field when said first message does not occupy the entire data field; and
transmitting said frame.
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Abstract
A method for transmitting messages between mobile stations and a cellular switching system is disclosed which improves channel burst capacity by allowing information from two distinct layer 3 messages to be transmitted in a unique layer 2 frame carried within a channel burst. The end of a first layer 3 message and the beginning of a second layer 3 message is identified in an end of message field which is used to delimit the layer 3 message information contained in a subsequent data field.
31 Citations
22 Claims
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1. A method for transmitting messages between mobile stations and a cellular switching system using multiple layer 2 frames, each carried within a channel burst, and providing a message delimiting capability within any specific layer 2 frame, comprising the steps of:
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dividing said specific frame into a plurality of fields; identifying a type of frame in a frame type field; placing information from two distinct messages in at least one data field; identifying the end of a first message and the beginning of a second message in an end of message field when said first message does not occupy the entire data field; and transmitting said frame. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for transmitting messages between mobile stations and a cellular switching system using multiple layer 2 frames, each carried within a channel burst, comprising the steps of:
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dividing a layer 3 message into a plurality of layer 2 frames, each layer 2 frame being transmitted in a different channel burst; dividing each layer 2 frame into a plurality of fields; identifying each layer 2 frame in a frame type field, wherein layer 3 message concatenation is supported using explicit means; and transmitting the first of a plurality of said layer 2 frames on a contention basis. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for transmitting messages between mobile stations and a cellular switching system using multiple layer 2 frames, each carried within a channel burst, and providing a message delimiting capability within any specific layer 2 frame, comprising the steps of:
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dividing said specific frame into a plurality of fields; identifying a type of frame in a frame type field; placing information from two distinct messages in at least one data field; identifying the end of a first message and the beginning of a second message using an end of message field when said first message does not occupy the entire data field; and transmitting said frame. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification