Method and apparatus for data retransmission within a communication system
AssigneeMotorola, Inc.
InventorJohn M. Harris
Life of this patent
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Abstract
Retransmissions of NAK'd frames takes place utilizing a retransmission channel (103-105). In particular, NAK'd frames are retransmitted to requesting remote units (113-115) on a channel (103-105) differing from the channel (109) in which they were originally broadcast to the remote units (113-115). Because retransmission of poorly-received frames occurs utilizing a channel that differs from the downlink multicast channel, the downlink transmission rate of the downlink channel is not reduced when retransmission needs to take place. This greatly improves data transmission to those units not requesting retransmission of data.
Claims19
A method for retransmitting data within a communication system, the method comprising the steps of:
- transmitting data to a first plurality of remote units over a first channel;
- receiving a request to retransmit the data to a second plurality of remote units;
- and
- retransmitting the data to the second plurality of remote units over a second channel while continuing to transmit data to the plurality of remote units over the first channel.
A method comprising the steps of:
- transmitting data to a first plurality of remote units over a supplemental channel;
- receiving a request from a second plurality of remote units to retransmit the data, wherein the second plurality of remote units are a subset of the first plurality of remote units;
- and
- retransmitting the data to the second plurality of remote units over a second channel differing from the supplemental channel.
A method comprising the steps of:
- receiving data transmitted on a first channel;
- requesting a retransmission of the data;
- and
- receiving retransmitted data on a second channel while continuing to receive data transmitted on the first channel, wherein the second channel differs from the first channel.
An apparatus comprising:
- first channel circuitry transmitting data to a first plurality of remote units over a first channel;
- logic circuitry coupled to the first channel circuitry, the logic circuitry having a request for retransmission as an input;
- and
- second channel circuitry retransmitting the data to a second plurality of remote units in response to the request.
Dependencies are inferred from the claim text.