Enabling downlink transparent relay in a wireless communications network
First Claim
1. A method at a mobile station for enabling downlink relay in a wireless communication system, the method at the mobile station comprising:
- receiving data, dedicated pilot signals, and common pilot signals from a base station; and
receiving a pre-coded data and a pre-coded dedicated pilot signals from a relay station,wherein a pre-coding matrix is applied to the data and the dedicated pilot signals at the relay station.
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Accused Products
Abstract
Methods and apparatus are described for enabling downlink transparent relay in a wireless communication network. In a wireless communications network, a base station and a mobile station may communicate with each other via a relay station, as needed. Transparent relay may allow for relay communication between a base station and a mobile station although the mobile station is unaware of the relay station. However, non-contiguous transmission of a relay station may lead to channel quality measurement and channel estimation degradation during downlink transparent relay. According to some aspects, a base station may schedule a mobile station to a transmission mode that utilizes dedicated pilot signals for downlink transparent relay, and a relay station may transmit data and dedicated pilot signals over the same channel resources as the base station. According to some aspects, the relay station may null common pilot signals transmitted by the base station.
128 Citations
20 Claims
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1. A method at a mobile station for enabling downlink relay in a wireless communication system, the method at the mobile station comprising:
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receiving data, dedicated pilot signals, and common pilot signals from a base station; and receiving a pre-coded data and a pre-coded dedicated pilot signals from a relay station, wherein a pre-coding matrix is applied to the data and the dedicated pilot signals at the relay station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A mobile station comprising a processor for enabling downlink relay in a wireless communication system, the processor is configured to:
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receive data, dedicated pilot signals, and common pilot signals from a base station; and receive a pre-coded data and a pre-coded dedicated pilot signals from a relay station, wherein a pre-coding matrix is applied to the data and the dedicated pilot signals at the relay station. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification