Dynamic Communication Resource Allocation for Wireless Networks

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Solution Overview

Problem

Existing wireless communication systems face inefficiencies in resource utilization due to the difficulty in dynamically adjusting the mix of symbols with long and short cyclic extensions, leading to inefficient communication resource management and low system throughput, especially in varying traffic conditions between broadcast and node-specific operations.

Innovation Solution

A default resource allocation structure is defined for transmitter nodes, allowing for dynamic and local adjustment of resource scheduling by estimating the need for multi-node and single-node associated information, enabling flexible sharing of communication resources between different types of information transmission.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a semi-fixed time pattern with mixed long and short cyclic extensions is employed for SFN and unicast operations, then broadcast information can be transmitted in SFN mode, but the resource allocation structure becomes difficult to change and cannot adapt to varying traffic demands in different network parts

Engineering Contradiction:

Improveadaptability to varying traffic conditionsVSAvoidcomplexity of resource allocation adjustment

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The network is divided into multiple network parts or regions, each capable of independently adjusting its resource allocation structure. This segmentation allows local adaptation to traffic conditions without requiring network-wide coordination, thus maintaining simplicity while improving adaptability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The resource allocation structure transitions from a fixed semi-fixed pattern to a dynamic configuration that can be adjusted in real-time based on local traffic demands. Each network part can dynamically modify the mix of long and short cyclic extensions according to its specific needs for broadcast and unicast traffic.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If the cyclic extension length is increased to support SFN operation, then broadcast information can be transmitted across multiple transmitter nodes, but the overhead cost increases and resource utilization efficiency decreases

Engineering Contradiction:

Improvecapability to support SFN broadcastVSAvoidoverhead cost of cyclic extension

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

Different network parts are allowed to use different cyclic extension lengths based on their local requirements. Network parts requiring SFN broadcast use longer cyclic extensions, while parts with primarily unicast traffic use shorter cyclic extensions, optimizing the balance between SFN capability and overhead cost locally.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The cyclic extension length parameter is made variable and adjustable in each network part rather than being fixed network-wide. This allows optimization of the parameter to match local traffic conditions, reducing overhead where SFN is not needed while maintaining SFN capability where required.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If a default resource allocation structure is applied uniformly across the whole network, then coordination between transmitter nodes is simplified, but the system throughput decreases due to inability to adapt to local traffic variations

Engineering Contradiction:

Improveease of network coordinationVSAvoidsystem throughput

Core Design Contradiction:

Ease of operationVSProductivity

Solution Approach 1:

The network is segmented into autonomous regions that can independently manage their resource allocation. Each segment maintains simplicity in coordination within its boundaries while gaining flexibility to optimize throughput locally, thus improving overall system productivity without sacrificing ease of operation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The resource allocation system is designed to be multi-functional, supporting both uniform default allocation for simple coordination and localized customized allocation for optimized throughput. The system can operate in different modes depending on traffic conditions, combining the benefits of both approaches.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS7885295B2Communication resource management

Publication Date: 2011.02.08 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

The invention involves management of communication resources (40, 45) in a network (1) utilizing multi-node-adapted resources (40) for transmission of multi-node-associated information and single-node-adapted resources (45) for transmission of single-node-associated information. A default resource allocation (60) specifying, for all transmitter nodes (10, 15) in the network (1), when the respective resource type is available for usage is defined. A subset (10) of the nodes in the network (1) estimates an expected amount of multi and/or single-node-associated information to be transmitted by the node subset (10). The default resource allocation (60) is then dynamically adjusted, for the node subset (10), based on the estimated expected information amount, implying that the physical resources (40, 45) defined by the default time structure (60) are dynamically shared in the frequency domain. According to the adjusted default resource allocation (65), a multi/single-node-adapted resource (40) will be allocated for transmission, by the node subset (10), of single/multi-node-associated information.