Automatic retransmission request
AssigneeTelefonaktiebolaget LM Ericsson
InventorsJohn W. Diachina, H.ang.kan C. Andersson, Bengt Persson
Life of this patent
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Abstract
A method for obtaining a report from a mobile station on the status of frames comprising an entire message transmitted to the mobile station is disclosed. First, a polling request is sent to the mobile station from a base station. A status report is then sent to the base station. The polling request specifies whether the mobile station should send the status report on a reservation basis (using a reserved frame) or on a contention basis (using an idle frame). The mobile station then transmits a bit map to the communication system to indicate which frames have been correctly received by the mobile station at the point when it received the polling request.
Claims11
A method for obtaining a report on the status of frames comprising a message transmitted to a remote station, comprising the steps of:
- transmitting said message to said remote station from a base station using layer 2 frames;
- sending a status request to said remote station from the base station using a layer 2 bit which is distinct from layer 2 bits used to carry the message;
- and
- sending a status report to said base station, wherein said status request contains a second layer 2 bit which specifies whether the remote station should send the status report on a reservation basis or on a contention basis.
A base station for use in a cellular communication system, comprising:
- means for transmitting a message to a mobile station using layer 2 frames;
- means for transmitting a status request to the mobile station using a layer 2 bit which is distinct from layer 2 bits used to carry the message;
- means for receiving a status report from said mobile station in response to said status request, wherein said status request contains a second layer 2 bit which specifies whether the mobile station should send the status report on a reservation basis or on a contention basis.
A mobile station for use in a cellular communication system, comprising:
- means for receiving a message from said cellular system which is transmitted using layer 2 frames;
- means for receiving a status request from said cellular system which is transmitted using a layer 2 bit which is distinct from layer 2 bits used to carry the message;
- means for transmitting a status report to said cellular system in response to said status request, wherein said status request contains a second layer 2 bit which specifies whether the mobile station should send the status report on a reservation basis or on a contention basis.
Dependencies are inferred from the claim text.