2021-12-15-中国联通-5G终端白皮书第五版（2021年度）_40页_1mb

报告摘要

Summary of China Unicom 5G Terminal White Paper V5

This document outlines the requirements for China Unicom's 5G terminal products, aimed at guiding 5G terminal development and promoting network-terminal synergy. It covers specifications for multi-mode, multi-frequency support; functional and performance requirements; terminal user interface (UI) standards; and other features based on 3GPP standards and network deployments.

Terminal Classification

5G terminals must support both Standalone (SA) and Non-Standalone (NSA) network architectures, along with NR Frequency Division Duplex (FDD) and Time Division Duplex (TDD) modes.
Terminals are categorized as either "Voice Data" (e.g., smartphones supporting voice and data services) or "Data" (e.g., MiFi, data cards).
By SIM card support: Single-card or dual-card; dual-card terminals optionally support dual 5G or single 5G functionality.

Multi-Mode and Frequency Requirements

NR frequency bands specified include n78 (3.3-3.8 GHz), n1 (824-960 MHz), n41 (2.4-2.6 GHz), n3 (1710-1880 MHz), and others (e.g., n5, n8, n28).
SA mode requires Option2 architecture; NSA mode requires Option3x.
Minimum protocol support: SA/NSA modes use 3GPP R15 and later; R16 support is recommended for advanced features.
Bandwidth and power levels: Detailed for FR1 and FR2 bands (sub-6 GHz and millimeter wave). For example, FR1 terminals must meet specific power outputs (e.g., +26dBm for TDD NR in n78).
EN-DC (Enhanced Node B Dual Connectivity) requires specific frequency combinations, such as n78 with LTE bands.

Functional Requirements

Core network interactions: SA mode mandates 5G Authentication and Key Agreement (AKA); NSA mode uses EPS and LTE-based authentication.
Services: Supports VoLTE/VoNR for voice calls, video streaming, SMS, emergency services (e.g., 110, 119), andIMS-based applications. 5G message support is required for RCS standards.
Networking features: Includes network slicing for tailored services (e.g., based on DNN); seamless handovers between SA/NSA, LTE, and NR; and interoperability with international roaming.
Security: Requires handling specific network reason values for registration rejections (e.g., #3 to #73).

Performance Requirements

Peak rates: SA NSA modes target up to 1.5Gbps downlink for n78; configurations include carrier aggregation (CA) for higher throughput.
Energy efficiency: Supports C-DRX, BWP switching, and R16 features for reduced power consumption. Refer to tests in the white paper for metrics.
Heating and endurance: Maximum temperatures specified for standby and active usage (e.g., 40-45°C).
Latency: Aim for user plane <4ms and control plane <10ms for SA/NSA operations.

User Interface and Card Compatibility

UI requirements: SA mode displays “5G” in status bar; must default-enable SA and disable separate 5G toggles.
Card compatibility: Supports dual-SIM/ eSIM with roaming, allowing backward compatibility with 2G/3G/4G networks.

Additional Features

Includes support for WiFi (802.11 b/g/n/ac, with AX recommended), ANR (and automatic network selection), edge computing, and localization (e.g., GPS, cellular, WLAN).
Dual-card terminals must support concurrent services for voice, data, and SMS; VoNR and CSFB features vary by mode.

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