Random Access MSG1 Indication for Uplink Resource Allocation

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Solution Overview

Problem

In wireless communication, when user equipment sends a third message of random access (MSG3), if the allocated uplink resources are insufficient, it necessitates a buffer status report, leading to additional power consumption and latency, and excessive resources are allocated by the base station due to unknown data amounts in MSG3, resulting in resource wastage.

Innovation Solution

The method involves including first indication information in the first message of random access (MSG1) to indicate the data amount of the uplink CCCH SDU in MSG3, allowing the base station to determine suitable uplink resources, ensuring MSG3 can be sent in one operation without excessive resource allocation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the base station allocates uplink resources without knowing the data amount of MSG3, then MSG3 can be transmitted, but excessive resources are allocated causing resource wastage

Engineering Contradiction:

Improveuplink resourcesVSAvoidresource wastage

Core Design Contradiction:

Quantity of substanceVSLoss of energy

Solution Approach 1:

The user equipment performs preliminary action by indicating the data amount of uplink CCCH SDU in MSG1 before the base station allocates uplink resources. This allows the base station to determine the exact resource requirement in advance and allocate precisely the needed amount, avoiding both resource wastage and insufficient allocation.

Inventive Principle:

Principle #10Preliminary action

2Quantity of substance

If the base station allocates insufficient uplink resources for MSG3, then resource wastage is avoided, but the user equipment needs to send a buffer status report causing additional power consumption and latency

Engineering Contradiction:

Improveuplink resourcesVSAvoidpower consumption

Core Design Contradiction:

Quantity of substanceVSUse of energy by moving object

Solution Approach 1:

The user equipment performs preliminary action by indicating the data amount of uplink CCCH SDU in MSG1 before the base station allocates uplink resources. This ensures the base station allocates sufficient resources in advance, preventing the need for buffer status reports and avoiding additional power consumption and latency.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The user equipment provides feedback about the data amount of uplink CCCH SDU in MSG1, enabling the base station to make informed resource allocation decisions. This feedback mechanism ensures accurate resource allocation that matches actual needs, avoiding both wastage and insufficient allocation.

Inventive Principle:

Principle #23Feedback

3Quantity of substance

If the base station allocates insufficient uplink resources for MSG3, then resource wastage is avoided, but latency increases due to additional buffer status report transmission

Engineering Contradiction:

Improveuplink resourcesVSAvoidlatency

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3796734B1Message sending method and device and resource allocation method and device

Publication Date: 2023.05.03 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

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AI summary

Examples of the present disclosure relates to a message sending method. The method is applicable to user equipment, and includes: sending a first message of random access to a base station; receiving a second message of random access from the base station; and sending a third message of random access via uplink resources indicated by the second message of random access. According to the examples of the present disclosure, the first indication information is carried in MSG1 to indicate a data amount of an uplink CCCH SDU included in MSG3 to be sent by the user equipment, such that the base station determines the data amount of the uplink CCCH SDU according to the first indication information, and then a data amount allowable to be transmitted via the uplink resources indicated by resulting MSG2 from the base station is greater than or equal to the data amount of the uplink CCCH SDU. Therefore, it is ensured that the user equipment completes the sending of MSG3 in one sending operation according to the uplink resources indicated by MSG2. There is no need for the base station to allocate excessive uplink resources, thereby avoiding a waste of the uplink resources.