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Event triggered multi-link channel quality measurement and report for mission critical applications

專利號(hào)
US11606782B2
公開日期
2023-03-14
申請(qǐng)人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Kambiz Azarian Yazdi; Jing Jiang; Tingfang Ji; John Edward Smee
IPC分類
H04W72/04; H04L5/00; H04L1/1867; H04L1/1607; H04L1/00; H04W72/08; H04W24/08
技術(shù)領(lǐng)域
cqi,may,pilot,carriers,ue,ccs,channel,station,resource,or
地域: CA CA San Diego

摘要

A transmitter may allocate resources across multiple links for a transmission to a receiver. The transmitter may transmit a resource grant to the receiver. The transmission may include a data packet allocated across multiple links, and pilot signals on a number of links. The receiver may use an indicator included with the resource grant to trigger measurement of channel quality for links with pilot signals.

說(shuō)明書

The described features generally relate to improved systems, methods, or apparatuses for event triggered multi-link channel quality measurement and report for mission critical applications. Some transmissions, such as mission critical transmissions, may require low error rates (e.g., 1e-4) or may be low latency (e.g., 500 μs). To support such transmissions, a high reliability is desired, such as successful delivery within few retransmission attempts, such as one or zero. Reliability may be increased by increasing the frequency diversity of transmissions. In order to increase reliability and frequency diversity, data packets may be transmitted across multiple links, such as multiple component carriers. When transmitting a data packet across multiple links, it may be beneficial to allocate more of the data packet on the links with a higher channel quality. As such, a first transmission may be allocated across multiple links. Further, it may be desired to have recent (i.e., within a time threshold) channel measurements when determining the link with the higher channel quality. The first transmission may also trigger the receiver to perform channel measurements, such as on links without recent channel measurements. To that end, the transmitter may include pilot signals on some or all of the multiple links. The pilot signals may be used by the receiver to perform channel measurements. An unsuccessful transmission, then, as indicated by the receiver transmitting a negative acknowledgement (NACK) signal to the transmitter, for example, may then result in the transmitter reallocating the data packet across the links for a retransmission. Reallocating the data packet may be based on the channel measurements performed so that the data packet is allocated to the link with the recently measured higher channel quality. By triggering channel measurements across multiple links so retransmission attempts may have updated channel quality measurements, reliability may be increased and the amount of retransmission attempts may be reduced.

權(quán)利要求

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