Back to results
US 2009/0154533 A1Published application
System and method for transmit time computation at a relay station
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsAli S. Khayrallah, Havish Koorapaty
Life of this patent
Estimating the term…
Abstract
Communications between a base station and a mobile station is improved through using a relay station. A transmit timing of relayed signals from the relay station is controlled so that the signals from the base station and the relay station arrive to the mobile station aligned with each other within a predetermined tolerance.
Claims25
A method of communicating with a mobile station, comprising:
- receiving, at a relay station of a wireless network, a communication signal SC from a base station of the network to be relayed as a relayed signal SR to the mobile station from the relay station;
- determining a relay transmission time tRM of the relayed signal SR;
- and
- transmitting, from the relay station at the relay transmission time tRM, the relayed signal SR to the mobile station,
- wherein the communication signal SC from the base station is also transmitted to the mobile station, and
- wherein the relay transmission time tRM is determined so that the relayed signal SR and the communication signal SC arrive within a predetermined time period of each other at the mobile station.
3 more elements
A method of communicating with a plurality of mobile stations, comprising:
- receiving, at a relay station of a wireless network, a communication signal (SC) from a base station of the network to be relayed as a relayed signal (SR) to the plurality of mobile stations from the relay station;
- determining an individual relay transmission time tRM corresponding to each of the plurality of mobile stations;
- determining a best fit relay transmission time tRM-BEST based on the individual relay transmission times tRM corresponding to the plurality of mobile stations;
- transmitting, from the relay station at the best fit relay transmission time tRM-BEST, the relayed signal SR to the plurality of mobile stations,
- wherein the communication signal SC from the base station is also transmitted to the plurality of mobile stations, and
- wherein the best fit relay transmission time tRM-BEST is determined so that a number of mobile stations receiving the relayed signal SR and the communication signal SC within a predetermined time period of each other is optimized.
3 more elements
A relay station of a wireless network configured to communicate with a mobile station, comprising:
- a base station communication unit configured to receive a communication signal SC from a base station of the network to be relayed as a relayed signal SR to the mobile station;
- a communication control unit operatively connected to the base station communication unit and configured to determine a relay transmission time tRM of the relayed signal SR;
- and
- a mobile station communication unit operatively connected to the communication control unit and configured to receive transmissions SM from the mobile station and transmit, at the relay transmission time tRM, the relayed signal SR to the mobile station,
- wherein the communication signal SC from the base station is also transmitted to the mobile station, and
- wherein the communication control unit is configured to determine the relay transmission time tRM so that the relayed signal SR and the communication signal SC arrive within a predetermined time period of each other at the mobile station.
3 more elements
A wireless network configured to communicate with a plurality of mobile stations, comprising:
- a base station configured to transmit a communication signal (SC) to the plurality of mobile terminals and to a relay station;
- and
- the relay station configured to relay the communication signal SC as a relayed signal (SR) to the plurality of mobile stations,
- wherein the relay station comprises the base station communication unit, the communication control unit, and the mobile station communication unit,
- wherein the communication control unit is configured to:
- determine a relay transmission time tRM of the relayed signal SR corresponding to each of the plurality of mobile stations, and
- determine a best fit relay transmission time tRM-BEST based on individual relay transmission times tRM corresponding to the plurality of mobile stations,
- wherein the mobile station communication unit is configured to transmit, at the best fit relay transmission time tRM-BEST, the relayed signal SR to the plurality of mobile stations, and
- wherein the best fit relay transmission time tRM-BEST is determined so that a number of mobile stations receiving the relayed signal SR and the communication signal SC within a predetermined time period of each other is optimized.
6 more elements
Dependencies are inferred from the claim text.