QoS Mapping for Relay Nodes via DSCP Tunnel Selection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless communication systems face challenges in efficiently routing data packets between relay nodes and access points, particularly in areas with limited geographic coverage and high traffic, where quality of service (QoS) differentiation is needed, and existing solutions do not effectively manage radio bearers and tunnels to ensure proper packet delivery.
Innovation Solution
The method involves establishing multiple communication tunnels between a donor access point and relay nodes, using protocol headers to select the appropriate tunnel for packet transmission based on parameters such as DSCP values, SDF filters, and UDP port numbers, ensuring proper bearer mapping and tunnel association to maintain QoS across radio bearers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple communication tunnels are established between donor access point and relay nodes to support QoS differentiation, then packet routing efficiency and QoS are improved, but device complexity and configuration overhead increase
Solution Approach 1:
The patent applies parameter changes by utilizing DSCP values in IP headers as selectable parameters to identify and route packets through appropriate communication tunnels. By changing the parameter used for tunnel identification from traditional methods to DSCP-based parameters, the system achieves QoS differentiation without requiring fundamentally new infrastructure, thus improving reliability while managing complexity
Solution Approach 2:
The patent introduces an intermediary mapping mechanism at the relay node that translates DSCP parameters from incoming packets to appropriate communication tunnels. This intermediary layer handles the complexity of multiple tunnels and QoS routing decisions, shielding higher-level protocols from the underlying complexity while maintaining reliable QoS-based packet delivery
2Reliability
If bearer mapping and tunnel associating procedures are implemented at relay nodes, then proper packet delivery is ensured, but processing time and operational complexity increase
Solution Approach 1:
The patent implements preliminary action by pre-establishing communication tunnels and pre-configuring bearer mappings at relay nodes before actual data transmission begins. The tunnel associating procedures are prepared in advance, creating lookup tables and mapping relationships that enable rapid packet forwarding without real-time computation, thus ensuring reliable packet delivery while minimizing processing time
Solution Approach 2:
The patent applies preliminary action by pre-establishing communication tunnels and pre-configuring bearer mappings at relay nodes before actual data transmission begins. The tunnel associating procedures are prepared in advance, creating lookup tables and mapping relationships that enable rapid packet forwarding without real-time computation, thus ensuring reliable packet delivery while minimizing processing time
3Area of stationary object
If relay nodes are deployed to expand network coverage in high traffic areas, then network capacity and coverage are improved, but packet loss and QoS degradation occur due to limited radio bearers
Solution Approach 1:
The patent applies segmentation by dividing the limited radio bearers between donor access point and relay nodes into multiple logical communication tunnels. Each tunnel is dedicated to specific QoS requirements or traffic types, allowing efficient multiplexing of limited physical resources. This segmentation enables the relay node to handle multiple traffic streams simultaneously with guaranteed QoS, expanding effective coverage area while preventing packet loss through proper resource allocation
Solution Approach 2:
The patent implements multi-functionality by designing communication tunnels that can serve multiple purposes: they function as both QoS-guaranteed dedicated channels and as flexible capacity carriers for different traffic types. The same tunnel infrastructure supports both voice and data services, enabling the relay node to expand coverage in high-traffic areas while maintaining reliable packet delivery through adaptive resource utilization
Data Source
AI summary
Systems and methodologies are described that facilitate packet routing among relay nodes in a wireless network. Bearer quality of service (QoS) mapping is provided for internet protocol (IP) relays by utilizing differentiated services (DiffServ) code point (DSCP) values to determine a bearer for communicating related packets. In addition, SDF filtering at a gateway node can be modified to route packets over certain tunnels to provide QoS for the packets.