Method and apparatus for controlling retransmission on uplink in a wireless communication system supporting MIMO
US9287949B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2014 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Dec 15, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03942
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatuses are provided for controlling retransmission by a User Equipment (UE) in a communication system. A negative acknowledgement (NACK) is received, from a Node B, for at least one transport block among a plurality of transport blocks transmitted by the UE. A precoding matrix and a number of layers for retransmission are determined. The at least one transport block is retransmitted using the determined precoding matrix and the determined number of layers. The precoding matrix is predefined and the number of layers is equal to a number of layers corresponding to the at least one transport block, if the UE does not receive a physical downlink control channel (PDCCH) intended for the UE and a number of the at least one transport block is not equal to a number of the plurality of transport blocks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.