CSIT collection method, cross-layer scheduling algorithm, and its system and equipment
A technology for user terminal equipment and base stations, which is applied in the communication between multiple stations, radio/induction link selection arrangement, selection device, etc., which can solve the requirement of delay in maintaining real-time services and guarantee QoS of different types of services at the same time. requirements and other issues, to achieve the effects of improving delay performance and delay jitter performance, improving spectrum utilization, and reducing signaling overhead.
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[0046] The implementation of the present invention will be further described in detail below in conjunction with the drawings and examples.
[0047] In the WRAN system, at the CPE side, 2048 subcarriers are divided into 32 subchannels. In order to collect channel state information of sub-channels, Embodiment 1 of the CSIT collection method of the present invention defines two kinds of channel state information exchange messages between BS and CPE: CSIT collection configuration message CSI-REQ-CFG and CSIT feedback message CSI- FED (CSIT Feedback Message, CSIT Feedback Message).
[0048] Table 1
[0049] Format
size
Remark
CSI_REQ_CFG_Message_Format(){
CSIT collects configuration messages
Management Message Type
8 bits
Manage message types
Nc
7 bits
Best subchannel to request feedback
quantity
Delta
X bits
Absolute maximum CSIT estimate
Difference
}
[0050]...
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