Method and system for measurement based automatic retransmission request in a radiocommunication system
OwnerFarooq Khan, Hakan Olofsson +2inventors
InventorsFAROOQ KHAN, HAKAN OLOFSSON, ANDERS FURUSKAR, MIKAEL HOOK
Life of this patent
Estimating the term…
Abstract
Hybrid ARQ techniques for error handling are described. The amount of redundancy transmitted in response to a first NACK message associated with a first attempt to decode a data block is variable. The number of redundancy units transmitted (and/or requested) can be selected based on various criteria including, for example, estimated channel quality, estimated block quality, memory usage, a number of outstanding blocks, etc.
Claims31
A method for transferring information over a communication link comprising the steps of:
- receiving a block of data over said communication link;
- determining a quality level of at least one of said received data block and said communication link;
- and
- requesting a quantity of additional information associated with said data block, said quantity selected based on said determined quality level.
An apparatus for transferring information over a communication link comprising:
- means for receiving a block of data over said communication link;
- means for determining a quality level of at least one of said received data block and said communication link;
- and
- means for requesting a quantity of additional information associated with said data block, said quantity selected based on said determined quality level.
A method for decoding information blocks in a radiocommunication system comprising the steps of:
- receiving a block of information;
- decoding said block;
- performing an error detection technique on said decoded sblock;
- if said block is determined to have been erroneously received, then determining a quality level;
- selecting, based on said quality level, a desired amount of redundant information;
- transmitting a request for said desired amount of redundant information to a transmitting entity;
- receiving said requested amount of redundant information;
- and
- jointly decoding said block of information and said redundant information.
A method for communicating information between a transmitting entity and a receiving entity comprising the steps of:
- estimating, at said receiving entity, a channel quality;
- transmitting, by said receiving entity, an indication associated with said channel quality;
- and
- transmitting, by said transmitting entity, a block of information plus an amount of redundancy associated with said information, wherein said amount is based on said indication.
A method for transferring information between a first transceiver and a second transceiver comprising the steps of:
- receiving a data block at said first transceiver;
- estimating a quality associated with one of said received blocks and a channel;
- transmitting by said first transceiver, said estimated quality to a second transceiver;
- determining, at said second transceiver, an amount of redundancy based, at least in part, on said estimated quality;
- and
- transmitting, by said second transceiver, said amount of redundancy to said first transceiver.
A method for communicating information between a first transceiver and a second transceiver comprising the steps of:
- receiving a data block at said first transceiver;
- estimating a first quality associated with at least one of said received block and a channel;
- transmitting, by said first transceiver, an indication associated with a selected amount of redundancy based on said estimated first quality;
- transmitting, by said second transceiver, said selected amount of redundancy to said first transceiver;
- estimating, at said first transceiver, a second quality associated with at least one of both said received block and received redundancy information and said channel quality;
- and
- transmitting an indication of said estimated second quality to said second transceiver.
Dependencies are inferred from the claim text.