| 摘要 |
A shared uplink acknowledgment (ACK) channel can be communicated to the payload recipient. The shared uplink ACK channel information can be communicated in the payload message or in a broadcast control channel. Reserving a dedicated time-frequency chunk for these short ACK messages and multiplexing different users to the same time slot with spreading codes having good cross-correlation properties can be used to accomplish such a shared uplink ACK channel.
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