Multi-Band Channel Access Anchoring High-Band to Low-Band
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Solution Overview
Problem
Wireless communication systems face challenges in multi-band operation, particularly with millimeter wave (mmW) communications experiencing higher signal attenuation and power consumption issues, leading to reduced coverage and increased interference, which existing technologies struggle to effectively address.
Innovation Solution
The described techniques involve anchoring higher-frequency band communications to lower-frequency band transmissions, allowing devices to determine viable uplink connections and adjust communication links accordingly, enabling synchronous or asynchronous operation across frequency bands to improve coverage and reduce signaling overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If millimeter wave communications are used to provide greater bandwidth, then data transmission capacity is improved, but signal attenuation increases and coverage is reduced
Solution Approach 1:
The system segments communication into multiple frequency bands, using low-band (sub-6 GHz) for control signaling and high-band (mmW) for data transmission. This segmentation allows each band to serve its optimal function, resolving the contradiction between bandwidth capacity and coverage reliability.
Solution Approach 2:
Low-band communications serve as an intermediary anchor for high-band mmW communications. The low-band provides reliable control channels that coordinate and support the high-band data transmissions, enabling the system to achieve both high capacity and reliable coverage.
2Productivity
If millimeter wave communications are deployed to increase bandwidth availability, then spectral efficiency is improved, but power consumption increases due to lower RF component efficiencies
Solution Approach 1:
The system employs periodic switching between low-band and high-band operations based on traffic requirements. Low-band is used periodically for control signaling and channel access, while high-band is activated periodically for data transmission only when needed, reducing overall power consumption while maintaining spectral efficiency.
Solution Approach 2:
The system dynamically changes operational parameters by switching frequency bands based on channel conditions and traffic demands. This parameter change allows the system to optimize the trade-off between spectral efficiency and power consumption by operating in high-band only when conditions permit.
3Productivity
If millimeter wave communications are used to provide greater bandwidth, then data rate is improved, but signal interference increases due to lower inter-site distances
Solution Approach 1:
The system segments the communication function into control plane (low-band) and user plane (high-band). This segmentation allows interference management to be handled on the low-band control channel, which has better propagation characteristics, while the high-band data channel can operate at higher rates with reduced interference through coordinated scheduling.
Solution Approach 2:
Low-band control channels act as intermediaries for coordinating high-band resource allocation. The low-band anchor provides a reliable control mechanism that manages interference on the high-band data channels through centralized scheduling and resource coordination.
4Productivity
If unlicensed mmW communications are deployed to increase bandwidth availability, then spectral efficiency is improved, but transmission power is limited by stricter EIRP regulations
Solution Approach 1:
The system segments power allocation across frequency bands, using low-band for control signaling where lower power is acceptable and high-band for data transmission where higher power is allocated within regulatory limits. This segmentation enables efficient use of available power resources while complying with EIRP regulations.
Solution Approach 2:
The system dynamically adjusts transmission power parameters based on channel conditions, distance, and regulatory constraints for each frequency band. This parameter optimization allows the system to achieve high spectral efficiency on unlicensed mmW bands while operating within EIRP power limits.
Data Source
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AI summary
Methods, systems, and devices for wireless communication are described. Some wireless communications systems may support multi-band operation. Different frequency bands may experience different communication characteristics (e.g., frequency-dependent fading), which may result in undesirable interference patterns and/or coverage gaps. The described techniques provide for channel access methods for multi-band operation. The channel access methods may allow for improved throughput for a wireless communications system. Additionally or alternatively, the described techniques may improve energy efficiency for communicating devices, reduce signaling overhead, or otherwise benefit a wireless communications system. Generally, the described techniques provide for efficient anchoring of high-band communications to low-band transmissions.