HNB Gateway Resource Control for Fixed Line Backhaul
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Solution Overview
Problem
Current methods for resource and QoS control in mobile networks, particularly in Home NodeB (HNB) systems, often lead to insufficient resource allocation in fixed line networks, resulting in failed voice calls due to insufficient backhaul link capacity, which is not adequately addressed by existing protocols like IP transport and DiffServ.
Innovation Solution
A method where information about the wireless part of the network is provided to the fixed line network for controlling communication, using identifiers such as local IP addresses, port numbers, and domain names to enable resource reservation and QoS management, allowing for reliable voice calls by interworking between mobile and fixed networks in the control plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If resource control is not implemented in fixed line network for HNB voice calls, then the system maintains simplicity with existing IP transport and DiffServ protocols, but the backhaul link capacity becomes insufficient leading to call failures
Solution Approach 1:
The patent applies preliminary action by performing resource reservation in the fixed line network before voice calls are established. The HNB-GW requests and reserves necessary backhaul link capacity in advance through interaction with the RACS, ensuring that sufficient resources are available before the call starts, thereby preventing call failures due to insufficient capacity.
Solution Approach 2:
The patent introduces an intermediary mechanism where the HNB-GW acts as a mediator between the mobile network and the fixed line network. It translates mobile network resource requirements into fixed line network resource requests, enabling coordinated resource control across both networks without requiring direct integration between them.
2Reliability
If resource reservation is implemented in fixed line network, then QoS for femto cell traffic is guaranteed, but the control mechanism becomes more complex requiring interworking between mobile and fixed networks
Solution Approach 1:
The patent applies universality by designing the HNB-GW to perform multiple functions: it acts as a gateway for HNB connections, a resource controller for the fixed line network, and an interface between mobile and fixed network protocols. This multi-functionality allows a single entity to handle diverse tasks without requiring separate specialized components for each function.
Solution Approach 2:
The patent implements feedback through the interaction between the HNB-GW and the RACS (Resource Admission Control System). The HNB-GW requests resources, the RACS evaluates availability and makes admission decisions, and this feedback loop enables dynamic QoS control. The system continuously monitors resource status and adjusts allocations accordingly to maintain guaranteed service quality.
3Ease of operation
If the HNB accepts calls without checking backhaul capacity, then the system operates with simple admission control, but calls may fail when the DSL access network lacks sufficient resources
Solution Approach 1:
The patent applies preliminary action by performing resource reservation in the fixed line network before voice calls are established. The HNB-GW requests and reserves necessary backhaul link capacity in advance through interaction with the RACS, ensuring that sufficient resources are available before the call starts, thereby preventing call failures due to insufficient capacity.
Data Source
AI summary
For allowing a reliable communication between the wireless part and the core network part via the fixed line network a method for operating a network, especially for policy control within the network, is provided, wherein the network includes a mobile network and a fixed line network, wherein the mobile network includes a wireless part and a core network part and wherein the mobile network and the fixed line network cooperate for providing communication between the wireless part and the core network part via the fixed line network. The method is characterized in that information regarding the wireless part will be provided via the mobile network to the fixed line network for controlling the communication within the fixed line network. Further, a corresponding network, preferably for carrying out the above mentioned method is disclosed.