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China United Network Communications Group Co., Ltd. (China Unicom) terminal equipment into stock - introduction of 5G terminal requirements

Time:2022/8/3 Posted:Deeplight Technology Co.,Ltd

1. China Unicom 5G terminal classification

According to the main functions of the terminal, 5G terminals can be divided into:

1) Voice data terminal: terminal equipment that can support both circuit domain or packet domain voice and packet domain bearer services, such as smart phone terminals;

2) Data terminal: terminal equipment that only supports services carried in the packet domain; such as MiFi, data card and CPE, etc.

According to the SIM card of the terminal, 5G terminals can be divided into:

5G single SIM card terminal: only supports one user identification card;

5G dual-card SIM terminal: supports two user identification cards.

2. 5G terminal frequency band requirements

1) The frequency band of 5G terminal NR mode should be selected to support n78, n1.

From April 2020, 5G terminals must support the n1 frequency band and 20MHz system bandwidth. China Unicom will require terminals to support the 40MHz and 50MHz system bandwidths of the n1 frequency band according to the progress of the n1 frequency band standard and the progress of the industry in 2020.

2) For the frequency band support in other modes of the 5G terminal, see "China Unicom 4G Mobile Phone Customization Specification v5.0".

The 5G terminal mode requirements are as follows:

5G mobile phone terminal: at least support 5-mode NR/LTE FDD/TD-LTE/WCDMA/GSM;

5G data terminal: at least support 4-mode NR/TD-LTE/LTE FDD/WCDMA.

3. Functional requirements of 5G terminals in 5G NSA mode

The 5G NSA EN-DC band combinations are as follows:


LTE-NR dual connectivity


DC_3A- n78A (20MHz/100MHz)Required;

DC_8A-n78A(10MHz/100MHz) Required;

DC_3C -n78A (30MHz/100MHz)Required;

DC_1A-n78A (20MHz/100MHz)Required;


DC_3A-n41A (20MHz/100MHz)Required;

DC_39A-n41A (20MHz/100MHz)Required;

DC_1A-3A-n78A (20MHz/20MHz/100MHz) Recommended;

DC_1A-3C-n78A (20MHz/30MHz/100MHz) Recommended;

DC_40A-n41A (20MHz/100MHz) Recommended.

The 5G NSA terminal should support the following basic functions:

Maximum Supported Carrier Bandwidth


Subcarrier spacing




Modulation Mode (NR)

DL: 256QAM;

UL: 256QAM

MIMO requirements

LTE upstream single-stream transmission + NR upstream single-stream transmission, required

LTE downlink dual-stream reception + NR downlink quad-stream reception, required

LTE upstream single-stream transmission + NR upstream dual-stream transmission, optional

LTE downlink quad stream reception + NR downlink quad stream reception, recommended

SRS requirements

In the n78 band, NR is required to support single-port SRS transmission

NR supports SRS 1T2R antenna rotation transmission, it is recommended to support SRS 1T4R rotation transmission

Shunt bearer

Required Downstream offload bearer that supports SN aggregation

From January 2020, the upstream offload bearer that supports SN aggregation must be selected

Power level requirements

For EN-DC combination, required to support total power up to 26dBm

BWP requirements

The terminal shall support at least 2 uplink/downlink BWPs (non-initial BWPs), support dynamic activation through RRC or DCI signaling, and only one can be activated at the same time

IP stack requirements

IPv4 single stack, IPv6 single stack and IPv4/v6 dual stack are supported, and IPv4/v6 dual stack is enabled by default. When obtaining IPv4 and IPv6 addresses at the same time, it is necessary to be able to normally access service applications compatible with IPv4 only, service applications compatible with IPv6 only, and service applications compatible with both IPv4 and IPv6


Supports C-DRX in RRC connected state, and long-cycle and short-cycle configurations

TDM mode

For NSA dual connection combination B3+n78, the terminal can optionally support TDM mode to solve the problem of IMD intermodulation interference

Dynamic power sharing

In NSA mode, it is required to support dynamic power sharing


4. 5G terminal service requirements

1. Terminal business capability requirements

For NSA mode, the following service type requirements shall be supported:

Business Type



Conversational Voice (VoLTE)



Conversational Video (ViLTE)



PS Domain Session Video






IMS signaling


QCI 5(non-GBR)

Interactive games


QCI 6(non-GBR)

Interactive TCP


QCI 7(non-GBR)

Preferred large size TCP data


QCI 8(non-GBR)

Best effort large size TCP data


QCI 9(non-GBR)

2. Voice service requirements

In NSA mode, 5G terminals must support CSFB and VoLTE (voice/video). Among them, VoLTE functions and services should meet the requirements of "China Unicom LTE Digital Cellular Mobile Communication Network Terminal Equipment Technical Requirements - Volume 1: VoLTE Terminal Technical Requirements V5.0".

VoLTE: 5G terminals should support the continuity of VoLTE services, including the following handover scenarios: handover between NSA cells and NSA cells, handover between NSA cells and ordinary 4G cells, and handover from NSA to 3G cells (eSRVCC).

CSFB: After the 5G terminal should support CSFB, the network-based or terminal-based autonomous fast return (4G); if the 4G cell supports NSA, the terminal should add NR immediately under the instruction of the network.

3. Concurrent business requirements

In NSA mode, the terminal should support concurrent voice and data services.

In the NSA cell, when VoLTE and data services are concurrent, VoLTE services should work on LTE in accordance with the current Unicom network configuration, and data services should work on NR in accordance with network instructions;

When the terminal moves from an NSA cell to another NSA cell, VoLTE and data services should follow the current Unicom network configuration to achieve synchronous handover;

When the terminal moves from the NSA cell to the LTE cell that does not support NSA, the VoLTE call should be maintained, and the data service should be maintained on the LTE according to the current Unicom network configuration;

When the terminal moves from the NSA cell to the 3G cell, the VoLTE call should be able to eSRVCC to the 3G cell, and the data service should be maintained on the 3G according to the current Unicom network configuration.

In the NSA cell, the data service should work on the NR according to the current Unicom network configuration. When a CSFB call is initiated or received, the data service should be able to continue on 3G.

4. SMS service requirements

For NSA mode, 5G terminals should support SMS over IP (IMS) and SMS over

This article is an introduction to the requirements of 5G terminals in NSA mode. If you have products that China Unicom needs to put into stock, you are welcome to consult Deeplight at any time. We will provide the most professional, reliable and accurate testing and certification services.

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