CoMP Base Station Resource Allocation via Candidate Notification

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Solution Overview

Problem

In Coordinated Multi-Point (CoMP) communication systems, the negotiation among base stations for allocating communication resources to user terminals can be delayed, leading to inefficient resource allocation and improper setting of timing advance values, especially in scenarios where user terminals are far from base stations and multiple base stations receive data simultaneously.

Innovation Solution

A mobile communication system where each base station in a CoMP cooperating set includes a notification unit to share communication resource allocation candidates with other base stations, a receiver to gather notifications, and a selector to choose a resource based on common selection rules, ensuring timely resource allocation and proper timing advance value setting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If base stations negotiate communication resource allocation through traditional methods, then resource allocation can be determined, but the negotiation time becomes excessively long due to transmission delays among base stations

Engineering Contradiction:

Improvenegotiation timeVSAvoidresource allocation accuracy

Core Design Contradiction:

Loss of timeVSReliability

Solution Approach 1:

Each base station preliminarily determines its own candidate communication resources and notifies other base stations in advance. This preliminary action eliminates the need for lengthy iterative negotiations, as base stations already have pre-prepared allocation candidates ready for selection.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The resource allocation process is segmented into independent base station operations: each base station independently determines candidate resources based on its own conditions, then shares these segmented results with others. This segmentation allows parallel processing and eliminates sequential negotiation delays.

Inventive Principle:

Principle #1Segmentation

2Reliability

If multiple base stations receive data from a user terminal simultaneously in JR-type CoMP, then communication diversity is improved, but it becomes difficult to properly set timing advance values due to different propagation delays

Engineering Contradiction:

Improvecommunication qualityVSAvoidtiming advance value setting

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

One base station is designated as a reference base station that serves as an intermediary for timing advance value determination. The reference base station's timing advance value becomes the common standard for all base stations in the CoMP set, simplifying the timing synchronization mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

All base stations in the CoMP set adopt the same timing advance value from the reference base station, creating equipotential timing conditions. This ensures that timing relationships are standardized across all base stations, eliminating the complexity of managing different timing values.

Inventive Principle:

Principle #12Equipotentiality

3Productivity

If base stations use independent resource allocation decisions, then allocation speed is improved, but coordination among base stations deteriorates leading to resource conflicts

Engineering Contradiction:

Improveallocation speedVSAvoidresource allocation coordination

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

Base stations exchange feedback information about their candidate resource allocations through notification messages. This feedback mechanism allows each base station to adjust its candidate selections based on what other base stations have chosen, ensuring coordinated allocation without sacrificing speed.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The individual resource allocation decisions of multiple base stations are merged through the notification and selection process. Base stations combine their candidate lists and select resources that work harmoniously across the CoMP set, achieving both speed and coordination.

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS9668246B2Mobile communication system, base station and communication control method for notification and management of resource allocation information in CoMP cooperating set

Publication Date: 2017.05.30 KYOCERA CORP

AI summary

In a mobile communication system in which a plurality of base stations included in a CoMP cooperating set allocate a same communication resource to a user terminal to perform a communication, each of the plurality of base stations comprises a notification unit that notifies another base station included in the CoMP cooperating set of a communication resource of allocation candidate for the user terminal in the base station itself; a receiver that receives a notification of a communication resource of allocation candidate for the user terminal in another base station included in the CoMP cooperating set from the other base station; and a selector that selects a communication resource to be allocated to the user terminal from communication resources of allocation candidates in the plurality of base stations, based on the notification received by the receiver.