Overlapping R2D and D2R Frequency Resources in Access Procedures
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing frequency resources during access procedures, particularly in evolving networks like E-UTRAN and next-generation 5G, which require improved methods for handling frequency division multiplexing to support voice over IP, multimedia, and multicast services.
Innovation Solution
A method and apparatus for handling frequency resources in access procedures involving monitoring and transmitting messages in overlapping frequency resources, allowing for efficient frequency domain overlap in Reader-to-Device (R2D) and Device-to-Reader (D2R) transmissions, enabling seamless communication protocols in wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency division multiplexing is used to support multiple services (voice over IP, multimedia, multicast), then service capacity and data throughput are improved, but frequency resource management complexity increases
Solution Approach 1:
The frequency resources are segmented into distinct R2D frequency resources and D2R frequency resources. The R2D resources are used for downlink transmissions from base station to device, while D2R resources are used for uplink transmissions from device to base station. This segmentation allows independent management and optimization of each frequency resource type, reducing overall management complexity while supporting multiple services through FDM.
Solution Approach 2:
The patent introduces frequency domain overlap as an additional dimension for resource management. By allowing D2R frequency resources to overlap with R2D frequency resources in the frequency domain while maintaining temporal separation, the system can efficiently utilize spectrum resources for multiple services without increasing management complexity, as the overlap is controlled through standardized resource allocation mechanisms.
2Productivity
If overlapping frequency resources are used for R2D and D2R transmissions, then spectral efficiency is improved, but interference management becomes more challenging
Solution Approach 1:
The patent employs periodic time-division structure within the overlapping frequency resources. R2D transmissions and D2R transmissions are separated in time through periodic scheduling, where downlink and uplink transmissions alternate in structured time frames. This periodic action allows frequency resources to overlap spatially while preventing interference through temporal separation, thereby maintaining high spectral efficiency.
3Productivity
If multiple D2R frequency resources are allocated from a single R2D frequency resource, then access procedure efficiency is improved, but frequency resource coordination complexity increases
Solution Approach 1:
The base station performs preliminary allocation of multiple D2R frequency resources from a single R2D frequency resource during the random access procedure. The R2D transmission contains scheduling information that pre-assigns multiple uplink frequency resources to the device before actual data transmission begins. This preliminary action streamlines the access procedure by eliminating the need for multiple negotiation steps, while the standardized allocation rules keep coordination complexity manageable.
Data Source
AI summary
Methods, systems, and apparatuses are provided for handling frequency resources in access procedures in a wireless communication system, wherein a method of a first device comprises monitoring or receiving a first Reader-to-Device (R2D) transmission, comprising a first message for triggering a random access procedure, in a first R2D frequency resource, wherein the first message indicates multiple Device-to-Reader (D2R) frequency resources, determining a first D2R frequency resource from the multiple D2R frequency resources, performing a first D2R transmission on the (determined) first D2R frequency resource, and monitoring a second R2D transmission for a response in a second R2D frequency resource in response to (performing) the first D2R transmission, wherein the second R2D frequency resource is overlapped with the first R2D frequency resource in frequency domain.