Relay Station Bandwidth Allocation via Dedicated CDMA Codes
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Solution Overview
Problem
Current wireless relay networks face challenges in efficiently allocating bandwidth across multiple links in multi-hop networks, particularly in communicating CDMA codes and allocating resources effectively between mobile stations, relay stations, and base stations.
Innovation Solution
The method involves assigning specific CDMA codes to relay stations for various procedures, allowing them to relay and forward these codes to base stations, which then allocate bandwidth based on the network topology and procedures, ensuring efficient transmission over multiple links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If relay stations are used to extend network coverage and enhance throughput, then network coverage and throughput are improved, but bandwidth allocation complexity increases
Solution Approach 1:
The patent introduces a relay station as an intermediary node between the base station and mobile station. The relay station receives signals from the base station, processes them, and forwards them to the mobile station. This intermediary structure enables extended network coverage and enhanced throughput by breaking down the direct transmission path into multiple manageable hops, thereby improving overall network productivity while managing complexity through structured intermediate processing.
2Reliability
If multiple CDMA codes are assigned to relay stations for different procedures, then communication reliability is improved, but code management complexity increases
Solution Approach 1:
The patent segments the communication procedures into distinct categories (ranging, bandwidth request, HARQ retransmission) and assigns specific CDMA codes to each category. This segmentation allows the relay station to reliably identify and process different types of communications using dedicated codes, improving communication reliability while managing complexity through systematic code assignment and procedure-specific code usage.
Data Source
AI summary
Various example embodiments are disclosed relating to relay networks or multi-hop networks, and also relating to bandwidth allocation for relay networks. According to an example embodiment, a method of allocating bandwidth in a relay network may include receiving at a relay station a first code (e.g., a first CDMA code) from a first station (e.g., mobile station) via a first link, sending a second code (e.g., second CDMA code) from the relay station to a second station (e.g., a base station) via a second link in response to receiving the first code, the second code being one of a plurality of codes assigned to the relay station, and receiving a bandwidth allocation message at the relay station from the second station, the bandwidth allocation message including the second code and indicating an allocation of bandwidth for a transmission over at least one of the first link and/or the second link.