Carrier Selection Thresholds for Wireless Terminal Uplink Adaptability

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing wireless communication technologies face challenges in selecting the appropriate uplink carrier for terminals without coverage enhancement (CE) capability, leading to reduced flexibility in base station scheduling and potential unsuccessful random access due to poor signal quality.

Innovation Solution

A carrier determining method that configures different Reference Signal Receiving Power (RSRP) threshold values for CE terminals and non-CE terminals, allowing terminals to select carriers based on their specific capabilities and improving load balancing between carriers.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the same RSRP threshold is used for all terminals, then CE terminals can initiate random access, but non-CE terminals without CE capability cannot achieve proper carrier selection

Engineering Contradiction:

Improvecarrier selection adaptabilityVSAvoidrandom access success rate

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies local quality by distinguishing between different terminal types (CE and non-CE terminals) and assigning different RSRP threshold values accordingly. This ensures that each terminal type uses the appropriate threshold for carrier selection, improving both adaptability and reliability.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent changes the parameter (RSRP threshold value) based on terminal capability. By setting different threshold values for CE and non-CE terminals, the system optimizes carrier selection for each terminal type, resolving the contradiction between adaptability and reliability.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If terminals frequently switch between carriers, then carrier selection flexibility is maintained, but access delay increases

Engineering Contradiction:

Improvecarrier selection flexibilityVSAvoidaccess delay

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The patent applies preliminary action by having terminals determine their carrier selection threshold in advance based on their CE capability before random access occurs. This pre-determination avoids frequent switching and reduces access delay while maintaining flexibility.

Inventive Principle:

Principle #10Preliminary action

3Area of stationary object

If SUL carriers are used for all terminals, then uplink coverage is expanded, but load balancing between carriers deteriorates

Engineering Contradiction:

Improveuplink coverage areaVSAvoidcarrier load balancing

Core Design Contradiction:

Area of stationary objectVSProductivity

Solution Approach 1:

The patent applies local quality by differentiating carrier selection based on terminal location and capability. Non-CE terminals use SUL carriers for coverage expansion, while CE terminals can use regular uplink carriers, achieving both coverage expansion and load balancing.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent applies partial action by having only non-CE terminals use SUL carriers, while CE terminals use regular uplink carriers. This partial application of SUL carriers maintains coverage expansion benefits while preventing excessive load on a single carrier type.

Inventive Principle:

Principle #16Partial or excessive action

Data Source

PatentUS20250031250A1Carrier determination method, carrier determination apparatus and storage medium

Publication Date: 2025.01.23 BEIJING XIAOMI MOBILE SOFTWARE CO LTD

AI summary

A carrier determining method, related devices and a storage medium. The terminal determines terminal information of its own, and determines a first threshold corresponding to the terminal information; and on the basis of the first threshold, determines a carrier for initiating data transmission.