Mobile Station Control Information Identifier for Multicast

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Solution Overview

Problem

In conventional mobile communication systems, a mobile station in 'Idle mode' cannot establish a dedicated channel, making it impossible for the radio network controller to determine the relevance of control information transmitted via a common channel for broadcast or multicast communication.

Innovation Solution

A mobile station equipped with a control information generating unit, a control information identifier adding unit, and a transmitting unit that adds a control information identifier to the MAC header, allowing transmission of control information to a radio network controller via a common channel without establishing a dedicated channel.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by moving object

If a mobile station in Idle mode uses a common channel to transmit control information, then energy consumption is reduced and channel establishment is simplified, but the radio network controller cannot determine the relevance of the control information for specific broadcast or multicast communication

Engineering Contradiction:

Improveenergy consumptionVSAvoidcontrol information relevance

Core Design Contradiction:

Use of energy by moving objectVSLoss of information

Solution Approach 1:

A control information identifier is introduced as an intermediary element in the MAC header to enable the radio network controller to identify and distinguish relevant control information from unrelated information transmitted via the common channel, resolving the ambiguity without requiring dedicated channels

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a dedicated channel is established for broadcast or multicast communication control, then control information transmission reliability is improved, but device complexity and channel establishment overhead increase

Engineering Contradiction:

Improvecontrol information transmission reliabilityVSAvoidchannel establishment complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The control information is segmented and tagged with identifiers that allow the radio network controller to selectively process only the relevant control information for specific broadcast or multicast groups, maintaining reliability without requiring full dedicated channel establishment

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The common channel is enhanced with control information identifiers to perform multiple functions - it can carry both general control information and group-specific control information, eliminating the need for separate dedicated channels for different communication types

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentUS8682276B2Broadcast communication or multicast communication-capable mobile station

Publication Date: 2014.03.25 NTT DOCOMO INC

AI summary

It is an object of the present invention to provide a mobile station which enables transmission of control information on broadcast communication or multicast communication to a radio network controller without establishing a dedicated channel in broadcast communication or multicast communication. The mobile station related to this invention includes a control information generating unit (14) for generating control information on broadcast communication or multicast communication, a control information identifier adding unit (15, 16, 17) for adding a control information identifier for specifying a type of the control information to the control information, and a transmitting unit (12) for transmitting the control information to a radio network controller (RNC) via a common channel.