RedCap Wireless Device Maximum Data Rate Restriction Modification
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Solution Overview
Problem
Current wireless devices (RedCap WDs) face limitations in maximum data rate calculation, requiring a product of MIMO layers, scaling factor, and modulation order to be no smaller than 4, which is not suitable for low-data-rate applications like industrial wireless sensor networks, leading to increased cost and power consumption.
Innovation Solution
Modifying or removing existing restrictions in 3GPP TS 38.306 to allow reduced maximum data rate capabilities for RedCap WDs, enabling them to support lower data rates while ensuring they can still receive system information and paging messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the legacy restriction requiring a product of MIMO layers, scaling factor, and modulation order to be no smaller than 4 is applied to RedCap WDs, then the maximum data rate is improved, but the cost and power consumption increase
Solution Approach 1:
The patent modifies the minimum product value from 4 to 1 for RedCap WDs, changing the parameter threshold that determines maximum data rate calculation. This parameter change allows RedCap devices to operate with lower data rate requirements while reducing their complexity and power consumption, as they no longer need to support the higher minimum data rate product of 4
2Speed
If the legacy restriction requiring a product of MIMO layers, scaling factor, and modulation order to be no smaller than 4 is applied to RedCap WDs, then the maximum data rate is improved, but the memory size and cost increase
Solution Approach 1:
By changing the minimum product parameter from 4 to 1, the patent reduces the required memory size for RedCap WDs. The lower parameter threshold means devices need less buffering and processing capability, directly reducing memory requirements and overall device cost
3Ease of manufacture
If the legacy restriction is modified to allow reduced maximum data rate capabilities for RedCap WDs, then the cost is reduced, but the ability to receive system information and paging messages may be affected
Solution Approach 1:
The patent applies different minimum product requirements to different message types: system information and paging messages require a minimum product of 1, while other data transmissions can operate with lower requirements. This local quality approach ensures critical messages are reliably received while allowing cost reduction for general data operations
Data Source
AI summary
A method, system and apparatus are disclosed. A method implemented in a wireless device configured to communicate with a network node is provided. A first indication is received from the network node indicating a first restriction, where the first restriction is related to a maximum data rate computation for at least one carrier and is different from a legacy restriction. A second indication is transmitted to the network node indicating a plurality of capability parameters, where the plurality of capability parameters violates the legacy restriction and is in accordance with the first restriction. The network node is communicated with on the at least one carrier according to a maximum data rate determination associated with the indicated plurality of capability parameters.