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eCPRI接口协议，中英文对应版.docx
1. Introduction
2. System Description
2.1. Definitions/Nomenclature
2.2. System Architecture
2.3. Functional Description
2.3.1. Functional Decomposition
3. Interface Specification
3.1. Protocol Overview
3 3.1.1. Physical Layer
16 3.2. User Plane
17 3.2.1. User Plane over Ethernet
3.2.2. User Plane over IP
3.2.3. eCPRI Message Format
4 3.2.3.1. eCPRI Transmission Byte Order
3.2.3.2. Common Header
3.2.3.3. eCPRI Payload
3.2.3.4. Mapping Examples
3.2.4. Message Types
3.2.4.1. Message Type #0: IQ Data
5 3.2.4.2. Message Type #1: Bit Sequence
3.2.4.3. Message Type #2: Real-Time Control Data
9 3.2.4.4. Message Type #3: Generic Data Transfe
16 3.2.4.5. Message Type #4: Remote Memory Acces
3 3.2.4.6. Message Type #5: One-Way Delay Measur
3 3.2.4.7. Message Type #6: Remote Reset
5 3.2.4.8. Message Type #7: Event Indication
3.2.4.9. Message Type #8-#63: Reserved
3.2.4.10. Message Type #64-#255: Vendor Specific
3.3. C&M Plane
3.4. Synchronization Plane
3.5. QoS
3.5.1. VLAN Tagging for Ethernet-switched frontha
3.5.2. QoS for IP-routed fronthaul networks
4.Forward and Backward Compatibility
4.1. Fixing eCPRI Protocol Revision Position
4.2. Reserved Bits and Value Ranges within eCPRI
4.3. eCPRI specification release version
4.4. Specification release version mapping to eCPR
1 5.Compliance
6.Annex A - Supplementary Specification Details (I
6.1. Functional Decomposition
6.1.1. eCPRI Functional Decomposition
3 6.1.2. Bit rate calculations / estimations
6.2. Synchronization and Timing
6.2.1. Synchronization of eRE
6.2.2. Synchronization of eREC
6.3. Link Delay Management
6.3.1. Reference Points for Delay Measurement
6.3.2. Delay Management example
9 6.4. Network Connection Maintenance
6.5. Networking
6.5.1. Difference between eCPRI and CPRI
12 6.6. Priority considerations
25 6.7. Message Ordering Considerations
6.8. Security
6.8.1. eCPRI Network Security Protocol
6.8.2. eCPRI Network Security Specification
6.8.2.1. User plane
6.8.2.2. C&M plane
6.8.2.3. Synchronization plane
7. List of Abbreviations
8. References
1 9. History
eCPRI Specification V1.1 (2018-01-10)
Interface Specification
Common Public Radio Interface:
eCPRI Interface Specification
The eCPRI specification has been developed by Ericsson AB, Huawei Technologies Co. Ltd, NEC Corporation and Nokia (the “Parties”) and may be updated
from time to time. Further information about eCPRI, and the latest specification, may be found at http://www.cpri.info
2
eCPRI Specification V1.1 (2018-01-10)
BY USING THE eCPRI SPECIFICATION, YOU ACCEPT THE “Interface Specification Download Terms and Conditions” FOUND AT
http://www.cpri.info/spec.html
IN ORDER TO AVOID ANY DOUBT, BY DOWNLOADING AND/OR USING THE ECPRI SPECIFICATION NO EXPRESS OR IMPLIED LICENSE
AND/OR ANY OTHER RIGHTS WHATSOEVER ARE GRANTED FROM ANYBODY.
.
© 2017 Ericsson AB, Huawei Technologies Co. Ltd, NEC Corporation and Nokia.
CPRI
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eCPRI Specification V1.1 (2018-01-10)
Table of Contents
1.
Introduction ................................................................................................................. 4
2. System Description .................................................................................................... 5
2.1. Definitions/Nomenclature ............................................................................. 5
2.2. System Architecture ..................................................................................... 6
2.3. Functional Description ................................................................................. 7
2.3.1.
Functional Decomposition ................................................................. 8
3.
Interface Specification .............................................................................................. 10
3.1. Protocol Overview ....................................................................................... 10
3.1.1.
Physical Layer ................................................................................. 12
3.2. User Plane ................................................................................................... 12
3.2.1. User Plane over Ethernet ................................................................ 12
3.2.2. User Plane over IP .......................................................................... 13
3.2.3.
eCPRI Message Format .................................................................. 13
3.2.3.1.
eCPRI Transmission Byte Order ............................... 14
3.2.3.2. Common Header ...................................................... 14
3.2.3.3.
eCPRI Payload ......................................................... 15
3.2.3.4. Mapping Examples ................................................... 15
3.2.4. Message Types ............................................................................... 16
3.2.4.1. Message Type #0: IQ Data ....................................... 16
3.2.4.2. Message Type #1: Bit Sequence .............................. 18
3.2.4.3. Message Type #2: Real-Time Control Data .............. 20
3.2.4.4. Message Type #3: Generic Data Transfer ................ 21
3.2.4.5. Message Type #4: Remote Memory Access ............. 23
3.2.4.6. Message Type #5: One-Way Delay Measurement .... 27
3.2.4.7. Message Type #6: Remote Reset ............................. 33
3.2.4.8. Message Type #7: Event Indication .......................... 35
3.2.4.9. Message Type #8-#63: Reserved ............................. 40
3.2.4.10. Message Type #64-#255: Vendor Specific ................ 40
3.3. C&M Plane ................................................................................................... 41
3.4. Synchronization Plane ................................................................................ 41
3.5. QoS .............................................................................................................. 41
3.5.1. VLAN Tagging for Ethernet-switched fronthaul networks ................. 41
3.5.2. QoS for IP-routed fronthaul networks .............................................. 41
4. Forward and Backward Compatibility ..................................................................... 42
4.1. Fixing eCPRI Protocol Revision Position .................................................. 42
4.2. Reserved Bits and Value Ranges within eCPRI ........................................ 42 4.3. eCPRI
specification release version .......................................................... 42
Specification release version mapping to eCPRI protocol revision ........ 42
4.4.
5. Compliance ............................................................................................................... 43
6. Annex A - Supplementary Specification Details (Informative) .............................. 44
6.1. Functional Decomposition ......................................................................... 44
6.1.1.
6.1.2.
6.2.1.
6.2.2.
eCPRI Functional Decomposition .................................................... 44
Bit rate calculations / estimations ..................................................... 45
6.2. Synchronization and Timing ...................................................................... 47
Synchronization of eRE ................................................................... 47
Synchronization of eREC................................................................. 47
6.3. Link Delay Management ............................................................................. 47
CPRI
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eCPRI Specification V1.1 (2018-01-10)
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6.3.1.
Reference Points for Delay Measurement ....................................... 48
6.3.2. Delay Management example ........................................................... 52
6.4. Network Connection Maintenance ............................................................. 54 6.5.
Networking .................................................................................................. 55
CPRI
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eCPRI Specification V1.1 (2018-01-10)
6.5.1.
6.6.
6.7.
Difference between eCPRI and CPRI .............................................. 55
Priority considerations ............................................................................... 56
Message Ordering Considerations ............................................................ 56
Security ........................................................................................................ 57
6.8.
6.8.1.
6.8.2.
eCPRI Network Security Protocol .................................................... 57
eCPRI Network Security Specification ............................................. 57
6.8.2.1.
6.8.2.2.
6.8.2.3.
User plane ................................................................ 57
C&M plane ................................................................ 57
Synchronization plane............................................... 57
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CPRI
10 7.
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12 9.
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eCPRI Specification V1.1 (2018-01-10)
List of
Abbreviations ................................................................................................
58
References ..................................................................................................
.............. 61
History ........................................................................................................
............... 62
CPRI
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eCPRI Specification V1.1 (2018-01-10)
1. Introduction
The Common Public Radio Interface (CPRI) is an industry cooperation aimed at defining publicly
available specifications for the key internal
interface of radio base stations, such as eCPRI
connecting the eCPRI Radio Equipment Control (eREC) and the eCPRI Radio Equipment (eRE) via
a so-called fronthaul transport network. The parties cooperating to define the specification are
Ericsson AB, Huawei Technologies Co. Ltd, NEC Corporation and Nokia.
公共无线电接口 (cpri) 是一种行业合作, 旨在为无线电基站的关键内部接口定义公开的规
格, 例如连接 ecpri 无线电设备控制 (erec) 和 ecpri 无线电的 ecpri 接口设备 (ere) 通过
所谓的前端传输网络。合作定义规格的各方有爱立信 ab、华为技术有限公司、nec 公司和
诺基亚。
Motivation for eCPRI:
Compared to CPRI [1], eCPRI makes it possible to decrease the data rate demands between eREC
and eRE via a flexible functional decomposition while limiting the complexity of the eRE.
与 cpri [1] 相比, ecpri 可以通过灵活的功能分解来降低 erec 和 ere 之间的数据速率要求,
同时限制了 ere 的复杂性。
Scope of Specification:
The necessary items for transport, connectivity and control are included in the specification. This
includes User Plane data, Control and Management Plane transport mechanisms, and means for
synchronization.
传输、连接和控制所需的项目包括在规范中。这包括用户平台数据、控制和管理平台传输机
制以及同步手段。
The eCPRI specification will support 5G and enables increased efficiency in order to meet the
needs foreseen for 5G Mobile Networks. In contrast to CPRI, the eCPRI specification supports
more flexibility in the positioning of the functional split inside the Physical Layer of the cellular
base station.
ecpri 规范将支持 5g, 并实现更高的效率, 以满足 5g 移动网络的预期需求。与 cpri 不同
的是, ecpri 规范支持在蜂窝基站的物理层内更灵活地定位功能分割。
The scope of the eCPRI specification is to enable efficient and flexible radio data transmission via a
packet based fronthaul transport network like IP or Ethernet. eCPRI defines a protocol layer which
provides various - mainly User Plane data specific - services to the upper layers of the protocol
stack.
ecpri 规范的范围是通过基于数据包的前端传输网络 (如 ip 或以太网) 实现高效、灵活的无
线电数据传输。ecpri 定义了一个协议层, 它为协议堆栈的上层提供各种--主要是用户平面
数据的特定--服务。
The specification has the following scope (see Figure 1):
该规范具有以下范围 (参见图 1)
1. The internal radio base station interface establishing a connection between ‘eCPRI Radio
Equipment Control’ (eREC) and ‘eCPRI Radio Equipment’ (eRE) via a packet based transport
network is specified.
指定了内部无线电基站接口, 通过基于数据包的传输网络在 "ecpri 无线电设备控制" (erec)
和 "ecpri 无线电设备" (ere) 之间建立连接。
2. Three different
(eCPRI User Plane data, C&M Plane data, and
information flows
Synchronization Plane data) are transported over the interface.
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3. 三种不同的信息流 (ecpri 用户平面数据、c & m 平面数据和同步平面数据) 通过接口
传输。
8
eCPRI Specification V1.1 (2018-01-10)
4. The specification defines a new eCPRI Layer above the Transport Network Layer. Existing
standards are used for the transport network layer, C&M and Synchronization.
5. 规范定义了一个新的 ecpri 层以上的传输网络层。现有的标准用于传输网络层、c & m
和同步。
eCPRI Radio Equipment Control
User Plane
Sync
(eREC)
Control
& Mgmnt
SAP U
SAP S
SAP CM
eCPRI
specific
Standard
Protocols
Transport Network Layer
Transport Network
eCPRI Radio Equipment
User Plane
Sync
(eRE)
Control
& Mgmnt
SAP U
SAP S
SAP CM
eCPRI
specific
Standard
Protocols
Transport Network Layer
Figure 1: System and Interface Definition
2. System Description
This section describes the eCPRI related parts of the basic radio base station system architecture
and defines the mapping of the functions to the different nodes. Furthermore, the reference
configurations and the basic nomenclature used in the following sections are defined.
本节介绍基本无线电基站系统体系结构中与 ecpri 相关的部分, 并定义了函数到不同节点的
映射。此外, 还定义了以下各节中使用的参考配置和基本术语。
The following description is based on the Evolved UMTS Terrestrial Radio Access (E-UTRA) and
5G. However, the interface may also be used for other radio standards.
以下描述基于演进的 UMTS 陆地无线电接入（E-UTRA）和 5G。 但是，该接口也可用于其他
无线电标准。
2.1. Definitions/Nomenclature
This section provides the basic nomenclature that is used in the following sections.
本节提供了以下部分中使用的基本术语。
eCPRI node:
The radio base station system is composed of two basic eCPRI nodes, the eCPRI Radio Equipment
Control and the eCPRI Radio Equipment (see Figure 1). The eCPRI Radio Equipment Control and
the eCPRI Radio Equipment are described in the following chapter. The radio base station system
shall contain at least two eCPRI nodes, at least one of each type: eREC and eRE.
无线电基站系统由两个基本的 eCPRI 节点组成，即 eCPRI 无线电设备控制和 eCPRI 无线电
设备（见图 1）。 eCPRI 无线电设备控制和 eCPRI 无线电设备将在下一章中介绍。 无线电
基站系统应包含至少两个 eCPRI 节点，每种类型至少有一种：eREC 和 eRE。
eREC / eRE element:
CPRI
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