EDMG MIMO Channel Access with Primary Secondary RF Chain Segmentation
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Solution Overview
Problem
Current IEEE 802.11ay standard for Next Generation 60 GHz (NG60) networks lacks defined MIMO channel access rules, including Clear Channel Assessment (CCA) and backoff timer configuration for directional multi-gigabit communication, which affects network efficiency and power management in EDMG networks.
Innovation Solution
The implementation of two options for MIMO channel access in EDMG networks: Option 1 involves all RF chains in preamble detection and NAV setting, while Option 2 uses a primary RF chain for preamble detection and energy detection by secondary RF chains, with specific backoff timer management to ensure channel access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all RF chains are activated for preamble detection and NAV setting in MIMO channel access, then channel access reliability is improved, but power consumption increases
Solution Approach 1:
The patent segments RF chains into primary and secondary categories with different functional roles. Primary RF chains perform comprehensive tasks including preamble detection and NAV setting, while secondary RF chains perform only energy detection. This segmentation allows the system to maintain reliable channel access through multiple RF chains while reducing overall power consumption by limiting the operational complexity of secondary chains.
2Measurement precision
If multiple RF chains perform comprehensive CCA and NAV maintenance, then MIMO channel access accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by assigning different operational characteristics to different RF chains based on their roles. Primary RF chains are configured with full functionality for comprehensive channel assessment, while secondary RF chains are configured with simplified energy detection only. This differentiated configuration improves measurement precision through multiple assessment points while avoiding the complexity of uniformly configuring all RF chains with full functionality.
Data Source
AI summary
A wireless communication device, system and method. The device includes a memory, a processing circuitry coupled to the memory and including logic, the processing circuitry to cause communication in an Enhanced Directional Multi-Gigabit (EDMG) network. The processing circuitry may be configured to: activate at least one Radio Frequency (RF) chain of a plurality of RF chains to allow detection of a preamble of a wireless communication and to allow a setting of a Network Allocation Vector (NAV); detect the preamble using the at least one RF chain; set the NAV using the at least one RF chain; maintain a backoff timer for the at least one RF chain; and, in response to a determination that the backoff timer has reached zero, cause a Multiple Input Multiple Output (MIMO) wireless communication in the EDMG network.