Decoupled downlink reception and uplink reception in a mixed licensed carrier and unlicensed carrier wireless communication system
摘要
說(shuō)明書(shū)
The wireless device 14-2 uses a licensed carrier (F1) to transmit data in the uplink, with, e.g., up to 24 decibel-milliwatts (dBm) uplink transmit power in some embodiments, to the HPN 12-1. Conversely, the LPN 12-2 uses unlicensed band, e.g. Industrial, Scientific, and Medical (ISM) or higher frequency bands, to transmit to the wireless device 14-2 in the downlink. Note that the wireless device 14-2 receives downlink control signaling and reference signals from the HPN 12-1 on the licensed carrier (F1). Such signals may include uplink scheduling grants, reference signals that facilitate measurements at the wireless device 14-2, and signals related to HARQ processes. In particular, in the embodiments described herein, the licensed carrier (F1) and the unlicensed carrier (F2) are both Time Division Duplexing (TDD) carriers. On F1, the wireless device 14-2 can also receive control information (e.g., scheduling grant) from the HPN 12-1. On F2, the wireless device 14-2 can also transmit control information (e.g., HARQ, CQI report, etc.) to the LPN 12-2. The purpose of the regular reports is to inform the LPN 12-2 when the wireless device 14-2 will be transmitting on F1. The regular reports may be periodic (e.g., triggered by periodic traffic) or aperiodic (e.g., triggered by sudden arrival of traffic or bursty traffic).
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