Uplink Grant Field Sizing for REDCAP Resource Allocation
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Solution Overview
Problem
Existing communication protocols result in resource waste for bandwidth-limited REDCAP UEs due to truncated frequency domain resource allocation fields, leading to inefficient use of frequency domain resources.
Innovation Solution
Adapt the frequency domain resource allocation field length based on the number of resource blocks supported by the UE, allowing for dynamic allocation and preventing truncation, and separate frequency hopping indication to avoid idle bits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the frequency domain resource allocation field is truncated to a fixed length according to existing protocol, then the protocol compatibility is maintained, but frequency domain resources are wasted due to idle bits
Solution Approach 1:
The patent makes the frequency domain resource allocation field length dynamic by adapting it to the actual bandwidth of the terminal device. Instead of using a fixed truncated length for all devices, the field length is adjusted based on the terminal's bandwidth capability, allowing full utilization of frequency domain resources without idle bits while maintaining protocol compatibility through conditional formatting rules.
Solution Approach 2:
The patent changes the parameter of field length from a fixed value to a variable that depends on terminal bandwidth. By modifying the length parameter of the frequency domain resource allocation field according to actual network conditions and terminal capabilities, the system eliminates resource waste while preserving compatibility with existing protocol structures.
2Device complexity
If a fixed 14-bit frequency domain resource allocation field is used for all UEs, then the protocol is simplified, but bandwidth-limited REDCAP UEs experience resource waste
Solution Approach 1:
The patent applies different field length configurations to different terminal types based on their bandwidth capabilities. Bandwidth-limited REDCAP UEs receive a shortened frequency domain resource allocation field appropriate to their capabilities, while other UEs continue to use the full 14-bit field. This localized adaptation optimizes resource utilization for each terminal type without unnecessarily complicating the overall protocol structure.
3Loss of substance
If the frequency domain resource allocation field length is reduced for bandwidth-limited UEs, then resource waste is reduced, but the allocation flexibility is limited
Solution Approach 1:
The patent dynamically adjusts the frequency domain resource allocation field length based on the specific bandwidth capabilities of each terminal device. This dynamic adaptation ensures that bandwidth-limited UEs receive an appropriately sized field that eliminates resource waste, while the network maintains the ability to allocate resources flexibly within the constraints of each terminal's capabilities through conditional formatting rules.
Data Source
AI summary
This application provides a communication method and apparatus. The method is applicable to a first terminal device, and the method includes that the first terminal device receives first uplink grant information. The method further includes that the first terminal device determines a resource for uplink transmission based on a first field in the first uplink grant information, and performs uplink transmission based on the resource. The first field is used for frequency domain resource allocation indication, a length Y of the first field is less than X, where X is a pre-specified value, or X is a length of a second frequency domain resource allocation field associated with a second uplink grant format. The first terminal device does not support the second uplink grant format. Y is related to a quantity N of resource blocks supported or configured by the first terminal device.