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DAPS Handover: UE Capability Information

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DAPS (Dynamic Spectrum Access and Policy) Handover refers to the process by which a User Equipment (UE), such as a mobile device or a wireless client, provides its capabilities to a new network or access point. The UE Capability Information plays a crucial role in this handover process as it informs the new network or access point about the capabilities and requirements of the UE.

UE Capability Information

The UE Capability Information provides details about the capabilities and requirements of the UE, including:

  1. Supported Radio Access Technologies (RATs): Information about the radio access technologies supported by the UE, such as LTE, 5G NR, Wi-Fi, etc.
  2. Supported Frequency Bands: Details about the frequency bands supported by the UE for communication.
  3. Supported Channel Bandwidths: Information about the channel bandwidths supported by the UE, which can vary depending on the radio access technology and frequency band.
  4. MIMO (Multiple Input Multiple Output) Configurations: Details about the MIMO configurations supported by the UE, such as the number of antennas and spatial streams.
  5. QoS (Quality of Service) Requirements: Information about the QoS requirements of the UE, including latency, throughput, and reliability requirements.
  6. Security Capabilities: Details about the security capabilities supported by the UE, such as encryption algorithms, authentication methods, and key management protocols.

Technical Details of DAPS Handover with UE Capability Information

  1. Initiation: The DAPS handover process is initiated when the UE detects a new network or access point that meets certain criteria, such as better signal strength, higher data rate, or specific policy requirements.
  2. UE Capability Information Exchange: During the handover process, the UE exchanges its capability information with the new network or access point. This information is typically transmitted using signaling messages defined by the respective radio access technology standards, such as LTE or 5G NR.
  3. Network Assessment: Upon receiving the UE Capability Information, the new network or access point assesses the capabilities and requirements of the UE to determine whether it can support the UE's communication needs. This assessment includes checking compatibility with supported RATs, frequency bands, channel bandwidths, MIMO configurations, and QoS requirements.
  4. Policy Evaluation: In addition to assessing the UE's capabilities, the new network or access point evaluates its policy rules to determine whether the UE meets the criteria for access, such as priority levels, service class identifiers, or bandwidth allocations.
  5. Handover Decision: Based on the assessment and policy evaluation, the new network or access point makes a handover decision. If the UE's capabilities and requirements align with the network's capabilities and policies, the handover process proceeds. Otherwise, alternative actions may be taken, such as denying access, redirecting the UE to another network, or applying traffic shaping policies.
  6. Handover Execution: Once the handover decision is made, the new network or access point initiates the handover process, which involves establishing a connection with the UE, transferring the ongoing communication sessions, and updating the network configuration parameters to accommodate the UE's requirements.