In-band Backhaul Using Fixed-Size Data Structures
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in managing backhaul traffic, particularly in satellite-based networks, where dedicated landline links are costly and resource-intensive, and existing standards do not effectively optimize air interface resources for backhaul operations.
Innovation Solution
The implementation of an in-band backhaul method that combines multiple service flows into a single backhaul service flow, using fixed-size data structures within frames, and a reduced MAP control message to minimize resource usage, allowing for efficient scheduling and transmission of packets without changing the size or position of bursts across frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated landline links are used for backhaul in satellite-based networks, then reliability is improved, but infrastructure cost and device complexity increase
Solution Approach 1:
The patent merges access and backhaul traffic onto a single wireless interface, eliminating the need for separate dedicated landline backhaul links. The base station simultaneously handles both access traffic (to wireless devices) and backhaul traffic (to core network) over the same air interface, thereby reducing infrastructure complexity while maintaining reliability through proper traffic management and scheduling
Solution Approach 2:
The wireless interface is made universal by enabling it to perform multiple functions: serving as both access point for wireless devices and backhaul link to core network. This multi-functional approach replaces dedicated backhaul infrastructure with a single wireless interface that dynamically handles different traffic types
2Ease of operation
If traditional MAC layer backhaul management is used, then ease of operation is maintained, but air interface resource consumption increases
Solution Approach 1:
The patent segments the MAC layer operations by introducing separate data structures (first and second data structures) to manage access traffic and backhaul traffic independently. This segmentation allows efficient resource allocation for each traffic type while maintaining overall MAC layer simplicity through structured organization of control information
Solution Approach 2:
The patent changes the parameter of control message size by using a reduced MAP control message for backhaul traffic instead of the full access MAP. This parameter change minimizes the air interface resources consumed for backhaul control information while maintaining ease of operation through standardized MAC layer procedures
3Manufacturing precision
If service flows are handled separately, then manufacturing precision of traffic management is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple service flows into a single backhaul service flow that is multiplexed over the backhaul region. This merging approach maintains traffic management precision through proper scheduling and data structure organization while reducing device complexity by eliminating the need to manage multiple separate backhaul service flows
Data Source
AI summary
A first service flow and a second service flow are combined into a backhaul service flow. One or more data structures within a first downlink frame are defined. The first downlink frame comprises an access region and a backhaul region. The one or more data structures are in the backhaul region. The one or more data structures are also defined within a second downlink frame. The second downlink frame comprises the access region and the backhaul region and the one or more data structures are in the backhaul region. The backhaul service flow is distributed into the one or more data structures. The first downlink frame and the second downlink frame are sent. The first downlink frame and the second downlink frame comprise an access map and a backhaul map. The access map has a size that is larger than the backhaul map.