Bandwidth and Primary Channel Indication in EDMG Wireless Networks
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Solution Overview
Problem
In wireless communication systems, particularly in next-generation 60 GHz networks and enhanced directional multi-gigabit networks, there is a challenge in efficiently indicating the primary channel and bandwidth, especially when secondary channels are used for transmission, as the primary channel ID is not always known to receiving devices, leading to complexities in signaling and channel allocation.
Innovation Solution
A bandwidth and primary channel indication system that encodes the primary channel ID, bandwidth value, and channel ID in a reduced number of bits, using indices to reference a table, allowing receiving devices to determine the channel settings for transmission, optimizing signaling by assuming the primary channel is known, thereby reducing the need to explicitly indicate all combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the primary channel ID is explicitly indicated in signaling, then the receiving device can accurately determine the primary channel, but the number of bits required for signaling increases
Solution Approach 1:
The channel indication is segmented into two parts: a bandwidth value indication and a primary channel ID indication. The receiving device uses the bandwidth value to determine the channel bandwidth, and then uses the primary channel ID (which is now smaller in magnitude due to the bandwidth constraint) to identify the specific primary channel. This segmentation allows for more efficient encoding than indicating the absolute channel ID directly.
Solution Approach 2:
The patent introduces a new dimension for channel identification by using bandwidth value as an additional parameter. Instead of directly indicating the primary channel ID, the system first indicates the bandwidth value, which constrains the possible range of primary channel IDs. This dimensional approach reduces the number of bits needed for primary channel indication.
2Loss of information
If all channel combinations are explicitly indicated, then complete channel information is provided, but the signaling complexity and bit requirement increase significantly
Solution Approach 1:
The patent extracts the bandwidth value information from the overall channel indication and handles it separately. By first determining the channel bandwidth and then using that information to constrain the primary channel ID search space, the system avoids the need to indicate all possible channel combinations explicitly. This extraction approach significantly reduces signaling complexity while maintaining information completeness.
Solution Approach 2:
The receiving device performs preliminary determination of the channel bandwidth before determining the primary channel ID. This preliminary action constrains the subsequent primary channel identification to a smaller, more manageable set of possibilities, reducing the overall signaling complexity and bit requirements while ensuring complete channel information is obtained.
3Quantity of substance
If the primary channel is assumed to be known, then the number of bits for indication is reduced, but the receiving device must have prior knowledge of the primary channel
Solution Approach 1:
The receiving device performs preliminary determination of the channel bandwidth using the indicated bandwidth value before determining the primary channel ID. This preliminary action provides the necessary context and constraints for accurately interpreting the primary channel ID indication, eliminating the need for prior knowledge of the absolute primary channel while still reducing the number of bits required for indication.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to bandwidth and primary channel indication. A device may encode an extended directional multi-gigabit (EDMG) field with one or more indications of a primary channel ID, a bandwidth value, or a channel ID for transmission over a wireless communication channel associated with the channel ID. The device may cause the EDMG field to be wirelessly transmitted to a first device over the wireless communication channel.