System and method for modulation and coding scheme adaptation and power control in a relay network
AssigneeBlackBerry Limited
InventorsRose Qingyang Hu, Yi Yu, Zhijun Cai, James Womack, Yi Song, Chandra S. Bontu, Mo-Han Fong
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Abstract
A method for determining a Modulation and Coding Scheme (MCS) and power control includes determining an error rate of a communication channel between the UA and at least one of the base station and the RN. When the error rate is below a first threshold, the method includes at least one of increasing the MCS, and reducing a transmission power of the UA. When the error rate is above a second threshold, the method includes at least one of decreasing the MCS, and increasing a transmission power of the UA.
Claims20
A method for determining a Modulation and Coding Scheme (MCS) for a wireless communication system, the method including:
- identifying an MCS for communications between a user agent (UA) and at least one of a base station and a relay node (RN);
- selecting the MCS based at least upon a coupling loss of a first link between the UA and the base station and/or a coupling loss of a second link between the UA and the RN;
- allocating an uplink (UL) resource for communication from the UA to the RN when a coupling loss of UL communication on the first link is greater than a coupling loss of UL communication on the second link;
- and
- allocating a downlink (DL) resource for communication from the base station to the UA when a power level of DL communication on the second link is less than a power level of DL communication on the first link.
A base station for determining a Modulation and Coding Scheme (MCS) for a wireless communication system, the base station comprising:
- a processor, the processor being configured to:
- select an MCS for communications between a user agent (UA) and at least one of a base station and a relay node (RN), wherein the MCS is selected based at least upon a coupling loss of a first link between the UA and the base station and/or a coupling loss of a second link between the UA and the RN;
- allocate an uplink (UL) resource for communication from the UA to the RN when a coupling loss of UL communication on the first link is greater than a coupling loss of UL communication on the second link;
- and
- allocate a downlink (DL) resource for communication from the base station to the UA when a power level of DL communication on the second link is less than a power level of DL communication on the first link.
A wireless communication system, comprising:
- a user agent (UA) for communicating with a base station and a relay node (RN), the UA being configured to receive an instruction from the base station, the instruction specifying a Modulation and Coding Scheme (MCS);
- and
- a base station configured to:
- allocate an uplink (UL) resource for communication from the UA to the RN when a coupling loss of a first UL channel between the UA and the base station is greater than a coupling loss of a second UL channel between the UA and the RN;
- and
- allocate a downlink (DL) resource for communication from the base station to the UA when a power level of a first DL channel between the UA and the RN is less than a power level of a second DL channel between the base station and the UA.
Dependencies are inferred from the claim text.