1 Rx/2 Rx Receiver Branch Access Under Network Barring
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Solution Overview
Problem
Current specifications bar reduced capability devices with 2 Rx branches from accessing the network, even if they can also operate with 1 Rx branch, leading to unnecessary restrictions and potential inability to camp on cells.
Innovation Solution
The UE determines its configuration to use either 1 Rx or both 1 Rx and 2 Rx branches based on network barring indications, allowing it to camp on cells by ignoring barring for 2 Rx if it supports both modes and only 1 Rx is allowed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network bars access for 2 Rx branches use, then network control over device capabilities is improved, but reduced capability devices that support both 1 Rx and 2 Rx branches are unnecessarily restricted from accessing the network
Solution Approach 1:
The UE dynamically adapts its reception configuration based on network barring indications. When 2 Rx is barred, the UE determines it can still access the network using 1 Rx configuration, even though it supports both modes. This dynamic adaptation allows the device to flexibly respond to network conditions while maintaining access capability.
Solution Approach 2:
The invention changes the interpretation of barring parameters. Instead of treating a bar for 2 Rx as a complete access restriction for devices supporting both modes, the UE interprets this as allowing access in 1 Rx mode. This parameter reinterpretation resolves the contradiction by maintaining network control while enabling device access flexibility.
2Adaptability or versatility
If the UE supports both 1 Rx and 2 Rx branches, then device capability versatility is improved, but the device may be barred from accessing networks that restrict 2 Rx use
Solution Approach 1:
The UE dynamically selects its operating mode based on network indications. When a network bars 2 Rx use, the UE automatically adapts to operate in 1 Rx mode, maintaining ease of access without requiring manual configuration or sacrificing its versatile capabilities.
Solution Approach 2:
The UE maintains universal access capability by being able to operate in both 1 Rx and 2 Rx modes. The invention ensures that this multi-functionality benefits the device by allowing it to access networks with different capability requirements, rather than being restricted by the most limiting configuration.
3Measurement precision
If the network provides separate barring indications for 1 Rx and 2 Rx, then network control precision is improved, but device access determination becomes more complex
Solution Approach 1:
The invention extracts the access determination logic from the complex interaction of multiple barring parameters. By focusing on the key insight that a bar for 2 Rx should not prevent 1 Rx access for dual-mode devices, the UE simplifies its access determination while the network maintains precise control through separate indications.
Solution Approach 2:
Instead of treating the barring indication as a restrictive filter that blocks access, the invention inverts the logic: the UE determines access is allowed unless explicitly barred for its specific configuration. This inversion simplifies the decision process while maintaining precise network control.
Data Source
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AI summary
An apparatus configured to: receive an indication that an access on a network entity is barred for two receiver branches use; receive an indication that access on the network entity is not barred for one receiver branch use; determine that the apparatus is configured to use the one receiver branch and the two receiver branches; and determine that access on the network entity is not barred for the apparatus. An apparatus configured to: transmit, to a user equipment, an indication that access on a network entity is barred for two receiver branches use; transmit, to the user equipment, an indication that access on the network entity is not barred for one receiver branch use; and receive, from the user equipment, an access request, wherein the user equipment is configured to use the one receiver branch and the two receiver branches.