Sampling Rate Selection for Multi-User Bandwidth Allocation
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Solution Overview
Problem
In multi-user wireless communication systems, the conventional channel handshake phase for allocating bandwidth is resource consumptive and inefficient, limiting the communication capacity due to high signaling overhead and backhaul bandwidth requirements.
Innovation Solution
The solution involves selecting sampling rates for received signals that are less than the Nyquist rate, eliminating the need for a channel handshake phase, and using a MAC transmission format with orthogonal pilots and power level adjustments to facilitate error-free decoding while reducing energy consumption and backhaul bandwidth usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a channel handshake phase is used for bandwidth allocation, then bandwidth allocation can be performed, but signaling overhead and backhaul bandwidth requirements increase
Solution Approach 1:
The patent extracts and eliminates the channel handshake phase from the bandwidth allocation process. By using pre-configured uplink resource allocations and random access procedures, the system removes the need for explicit handshake signaling between network control entities and communication devices, thereby reducing signaling overhead while maintaining bandwidth allocation functionality
Solution Approach 2:
The patent implements preliminary action by pre-configuring uplink resource allocations and transmission parameters before actual data transmission. The system prepares sampling rates, power levels, and resource assignments in advance, allowing devices to transmit immediately without requiring real-time handshake negotiations, thus reducing signaling overhead
2Reliability
If Nyquist sampling rate is used for received signals, then error-free decoding is achieved, but energy consumption increases
Solution Approach 1:
The patent applies parameter changes by selecting optimized sampling rates that are lower than the traditional Nyquist rate. The system adjusts sampling parameters based on pre-configured transmission settings and signal characteristics, achieving a balance between decoding reliability and energy consumption by using the minimum necessary sampling rate for each communication device
3Adaptability or versatility
If conventional bandwidth allocation procedures are used, then bandwidth can be allocated to multiple devices, but backhaul bandwidth requirements increase
Solution Approach 1:
The patent extracts and eliminates the need for extensive backhaul signaling by removing the channel handshake phase. Bandwidth allocation decisions are made using pre-configured parameters and random access information, reducing the amount of data that needs to be transmitted over the backhaul connection while maintaining the ability to allocate bandwidth to multiple devices
Solution Approach 2:
The patent implements self-service by enabling communication devices to autonomously determine their transmission parameters using pre-configured information and random access procedures. Devices self-select their resource allocations based on configured parameters without requiring network control entity signaling, thereby reducing backhaul bandwidth requirements
Data Source
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AI summary
An apparatus and an associated method selects rates at which received signals are sampled in a multi-user communication system. The signals are sampled at initial sampling rates during a first period. An estimate is made of the number of received signals, and selection is made of an updated sampling rate, based in part upon the estimate.