Communication Apparatus BWP Switching for Reduced Capability Devices
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Solution Overview
Problem
Second communication apparatuses in 5G mobile communication systems experience unnecessary operations when no cell defining-synchronization signal block (CD-SSB) is present on the specific initial bandwidth part (BWP), leading to inefficient resource utilization and increased power consumption.
Innovation Solution
The communication apparatus transmits a request message for establishing or resuming a radio resource control (RRC) connection on a specific initial BWP and then interrupts measurement and evaluation processing if no CD-SSB is present, switching to an initial BWP with a CD-SSB for appropriate operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If measurement processing and evaluation processing for cell reselection are continuously executed after transmitting a request message, then cell reselection capability is maintained, but power consumption increases and useless operations occur when no CD-SSB is present
Solution Approach 1:
The patent applies dynamics by making the measurement and evaluation processing conditional rather than continuous. The processing is dynamically adjusted based on the presence of CD-SSB on the specific initial BWP. When CD-SSB is present, measurement and evaluation continue normally; when absent, they are interrupted. This dynamic adaptation resolves the contradiction by maintaining reliability only when necessary while reducing power consumption when conditions don't support effective operation.
Solution Approach 2:
The patent changes the operational parameter of measurement processing based on the detection of CD-SSB presence. The system transitions between two states: active measurement/evaluation when CD-SSB is present, and interrupted/suspended state when CD-SSB is absent. This parameter change approach allows the system to adapt its behavior to environmental conditions, resolving the contradiction between maintaining cell reselection capability and reducing unnecessary power consumption.
2Duration of action of stationary object
If measurement processing and evaluation processing are executed on a specific initial BWP without CD-SSB, then processing continuity is maintained, but resource utilization efficiency decreases due to useless operations
Solution Approach 1:
The patent applies preliminary action by checking for the presence of CD-SSB on the specific initial BWP before executing measurement and evaluation processing. This preliminary detection prevents the system from initiating useless processing operations in the first place. By performing this check beforehand, the system avoids wasting resources on measurements that cannot contribute to effective cell reselection, thereby improving resource utilization efficiency while maintaining processing continuity only when productive.
3Adaptability or versatility
If the communication apparatus operates on a specific initial BWP for reduced capability devices, then device functionality is enabled, but unnecessary operations occur when CD-SSB is absent
Solution Approach 1:
The patent implements feedback by continuously monitoring the presence of CD-SSB on the specific initial BWP and using this information to control the execution of measurement and evaluation processing. The system receives feedback about the radio environment (CD-SSB presence) and adjusts its operations accordingly. When feedback indicates CD-SSB is absent, the system stops measurement and evaluation processing, thereby eliminating useless operations while maintaining support for reduced capability devices.
Data Source
AI summary
A communication apparatus that is a second communication apparatus having a communication capability reduced as compared with a first communication apparatus having a designated communication capability, the communication apparatus includes: a transmitter configured to transmit a request message for establishing a radio resource control (RRC) connection or resuming the RRC connection to a base station on a specific initial BWP for the second communication apparatus, which is a bandwidth part (BWP) that is a part of a bandwidth of a cell of the base station; and a controller configured to execute measurement processing and evaluation processing for cell reselection after the request message is transmitted. The controller is configured to perform control to interrupt at least one of the measurement processing and the evaluation processing after the request message is transmitted, when no cell defining-synchronization signal block and physical broadcast channel block (CD-SSB) is present on the specific initial BWP.