Compact Bandclass Field for Wireless Load Balancing

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Solution Overview

Problem

Current wireless communication systems face inefficiencies in conveying bandclass information, leading to suboptimal system functionality and increased call drops due to the large size of messages like CDMABandClassList, which occupy significant system resources and hinder load balancing.

Innovation Solution

Implementing a revised ANSI-41 standard that uses a compact bandclass indicating field with individual bits in messages such as ISPAGE, ISPAGE2, QUALDIR, and REGNOT to efficiently convey bandclass support information between switching modules, reducing message size and enabling timely provision of bandclass information for improved load balancing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If the CDMABandClassList parameter is used to convey bandclass information, then complete bandclass support information is provided, but message size becomes large and occupies significant system resources

Engineering Contradiction:

Improvebandclass information completenessVSAvoidmessage size

Core Design Contradiction:

Loss of informationVSQuantity of substance

Solution Approach 1:

The bandclass information is segmented into individual bit fields, where each bit represents support for a specific bandclass. This allows the information to be divided into discrete, minimal-unit representations rather than transmitted as a complete list, reducing overall message size while maintaining information completeness.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The representation format of bandclass information is changed from a list-based parameter (CDMABandClassList) to a bit-field parameter (CDMACallMode). This parameter transformation compresses the data by representing multiple bandclass support states in a compact binary format, significantly reducing the quantity of data transmitted.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If bandclass information is omitted from messages, then message size is reduced, but load balancing capability deteriorates and call drops increase

Engineering Contradiction:

Improvemessage sizeVSAvoidcall drop rate

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The bandclass support information is preliminarily encoded into the CDMACallMode parameter and made available to the border MSC before call establishment. This preliminary provision of information enables the border MSC to perform load balancing decisions and select appropriate bandclasses in advance, preventing call drops due to unavailable services.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The CDMACallMode parameter acts as an intermediary that carries essential bandclass information in a compact form. This intermediary structure enables the border MSC to obtain necessary information for load balancing without receiving the full CDMABandClassList, thus maintaining both message efficiency and call reliability.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Loss of information

If the CDMABandClassList parameter is transmitted, then bandclass information is provided, but system resources are consumed and load balancing is hindered

Engineering Contradiction:

Improvebandclass information availabilityVSAvoidsystem resource efficiency

Core Design Contradiction:

Loss of informationVSProductivity

Solution Approach 1:

The essential bandclass information is extracted from the complete CDMABandClassList and placed into the compact CDMACallMode parameter. This extraction process removes unnecessary data redundancy while retaining the critical information needed for bandclass selection and load balancing, improving system resource efficiency.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The data structure parameter is changed from a verbose list format to a compact bit-field format. This parameter transformation reduces the computational and transmission overhead associated with processing bandclass information, thereby improving overall system productivity and resource utilization.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS7949363B2Methods and systems for efficient conveyance of bandclass information in wireless networks

Publication Date: 2011.05.24 NOKIA OF AMERICA CORP

AI summary

Systems and methods are presented for efficiently conveying bandclass information between switching modules in a wireless communications system to facilitate call delivery or call origination. A compact bandclass information field is provided in inter-system paging and other non-handoff messages, in which each of a plurality of field bits indicates whether a particular bandclass is supported by a given mobile communications unit, thereby providing bandclass support information in an efficient manner to a recipient switching module.