Wireless Device Frequency Priority Handling for 5G NR Access
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Solution Overview
Problem
In wireless communication systems, especially in 5G NR, the listen-before-talk (LBT) procedure for accessing unlicensed frequencies leads to delayed initial access, which is undesirable for delay-sensitive services like voice calls, as it prolongs the time to establish connections.
Innovation Solution
A method where a wireless device prioritizes or de-prioritizes frequencies based on service-specific information received through paging messages, allowing it to perform cell reselection and initiate access on licensed frequencies instead of unlicensed ones to reduce delay and ensure timely service delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wireless device uses LBT procedure to access unlicensed frequency, then the device can operate on unlicensed spectrum, but the initial access time is delayed
Solution Approach 1:
The patent applies dynamics by making the frequency selection adaptive based on service type. The wireless device dynamically chooses between unlicensed and licensed frequencies depending on whether the service is delay-sensitive or not, optimizing the balance between spectrum utilization and access speed
Solution Approach 2:
The patent changes the operating parameter (frequency type) based on service characteristics. By modifying the frequency selection parameter according to service delay requirements, the system achieves both unlicensed spectrum access and fast initial access when needed
2Adaptability or versatility
If the wireless device camps on unlicensed frequency cell, then the device can access unlicensed spectrum services, but the connection establishment is delayed for delay-sensitive services
Solution Approach 1:
The patent applies preliminary action by having the wireless device perform cell reselection to licensed frequency before actual service establishment when delay-sensitive services are detected. This preliminary frequency change ensures reliable service delivery while still allowing unlicensed frequency operation for non-delay-sensitive services
3Loss of time
If the wireless device performs cell reselection to licensed frequency, then the initial access delay is reduced, but the device loses unlicensed spectrum access
Solution Approach 1:
The patent applies local quality by providing different frequency access characteristics for different services. Delay-sensitive services get licensed frequency access for fast connection, while non-delay-sensitive services can use unlicensed frequency for spectrum efficiency, creating localized optimization for each service type
Data Source
AI summary
A method and apparatus for handling a frequency priority based on a service in a wireless communication system is provided. The wireless device camps on a serving cell operated on a first frequency. The wireless device receives, from the serving cell, a paging including an information related to a service. The wireless device prioritizes or de-prioritizes the first frequency based on the information. The wireless device performs cell reselection based on a priority of the first frequency.