IEEE 1914.3标准：无线电在以太网中的封装与映射

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"IEEE标准关于以太网上的无线电封装和映射" 本文将详细解析IEEE Std 1914.3™-2018标准，该标准定义了以太网上的无线电（Radio over Ethernet，RoE）封装和映射方法。此标准由IEEE通信学会的移动通信网络标准委员会赞助，并在2018年9月27日得到IEEE-SA标准董事会批准。主要关注的是如何将无线电信号协议封装到以太网帧中，以便于在以太网网络上传输。 1. **无线电协议封装**：RoE技术允许将无线通信信号通过以太网基础设施进行传输，这包括对无线电信号的数字化处理和封装。这种技术在现代无线通信系统中尤其重要，因为它能够利用广泛部署的以太网基础设施，降低部署成本并提高网络的灵活性。 2. **结构无感知定义**：标准中提供的结构无感知定义适用于任何数字化的无线数据，这意味着它不依赖特定的无线协议或编码方式。这种通用性允许RoE技术适应各种不同的无线通信标准和系统。 3. **结构有感知定义**：针对Common Public Radio Interface (CPRI)提供了结构有感知的定义。CPRI是一种广泛用于移动基站与基带处理单元之间的接口标准，它定义了如何高效地传输射频数据。标准中的这些定义确保了CPRI信号能够正确地映射到以太网帧中，保持其原有的性能和效率。 4. **原生模式定义**：标准中可能还包括对原始或“原生”无线模式的定义，这些模式可能是未经处理的、特定无线系统的信号格式。这有助于确保不同无线设备之间的一致性和兼容性。 5. **应用领域**：RoE技术在多个无线通信领域有应用，如4G/5G移动网络、无线回传、公共安全通信以及物联网(IoT)等。它简化了网络架构，减少了硬件需求，并且通过以太网提供集中管理和监控的可能性。 6. **标准重要性**：IEEE 1914.3标准的制定，对于推动无线通信与有线网络的融合，提升网络效率，以及促进无线基础设施的标准化和互操作性具有重要意义。同时，它也为未来无线通信系统的演进和技术创新奠定了基础。 IEEE Std 1914.3™-2018标准是无线通信与以太网技术结合的关键，它提供了一套统一的规范，使得无线信号能够在以太网环境中高效、可靠地传输，从而推动了无线网络部署的创新和发展。

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Figure 26—Timing packet format .................................................................................................................. 56

Figure B.1—Packed position AxC Container mapping in the I/Q data block ................................................. 65

Figure B.2—Flexible position AxC Container mapping in the I/Q data block ............................................... 65

Figure B.3—Example of CPRI mapping method #3 ...................................................................................... 66

Figure B.4—Example of using modulo rules and the structure-aware RoE mapper ....................................... 66

Figure B.5—Example of conguration parameter sets ................................................................................... 67

Figure E.1—RoE OAM TLV Example........................................................................................................... 74

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List of Tables

Table 1—RoE EtherType ............................................................................................................................... 17

Table 2—subType mapping table ................................................................................................................... 22

Table 3—RoE subType values ....................................................................................................................... 23

Table 4—RoE owID values .......................................................................................................................... 24

Table 5—Sequence number related parameters .............................................................................................. 26

Table 6—Object type enumeration ................................................................................................................. 30

Table 7—Ethernet link parameters ................................................................................................................. 30

Table 8—CPRI port parameters ..................................................................................................................... 31

Table 9—RoE mapper/de-mapper parameter relevance ................................................................................. 31

Table 10—RoE mapper parameters ................................................................................................................ 32

Table 11—RoE de-mapper parameters ........................................................................................................... 34

Table 12—subType mapping object parameters ............................................................................................. 35

Table 13—Parameters under RoE.Container branch ...................................................................................... 38

Table 14—Control process RoE mappers for CPRI control words ................................................................. 41

Table 15—CPRI control word RoE mapper container parameters ................................................................. 43

Table 16—Subchannel word bit masks .......................................................................................................... 44

Table 17—Hyper-frame ltering options ....................................................................................................... 44

Table 18—Parameters under mapper[mapperID].[fftID] branch ................................................................... 47

Table 19—Parameters mapper[mapperID].[fftID].[PRACH] branch ............................................................ 49

Table 20—RoE control packet opCode values ............................................................................................... 50

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1. Overview

1.1 Scope

This standard denes the encapsulation and mapping of radio protocols for transport over Ethernet frames,

using radio over Ethernet (RoE). Structure-agnostic denitions are provided for any digitized radio data.

Structure-aware denitions are provided for the Common Public Radio Interface (CPRI™). Native mode

denitions are provided for digitized radio in-phase and quadrature (I/Q) payload and control data channels.

1.2 Purpose

This standard enables the transfer of I/Q user-plane data, vendor-specic data, and control and management

(C&M) information channels across an Ethernet-based packet-switched network. The standard fosters

interoperability among implementations by dening the framing, the encapsulation of the information, and a

common Ethernet Type for RoE purposes.

2. Normative references

The following referenced documents are indispensable for the application of this standard (i.e., they must be

understood and used; therefore, each referenced document is cited in text, and its relationship to this standard

is explained). For dated references, only the edition cited applies. For undated references, the latest edition of

the referenced document (including any amendments or corrigenda) applies.

3GPP Specication TS 36.211, Evolved Universal Terrestrial Radio Access (E-UTRA); Physical channels and

modulation.

Common Public Radio Interface (CPRI™) Specication, v7.0.

2,3

IEEE Std 754™-2008, IEEE Standard for Binary Floating-Point Arithmetic.

4,5

The 3GPP specication is available from the 3GPP Website, http:// www .3gpp .org/ specications/ releases.

The CPRI specication is available from the CPRI Website, http:// www .cpri .info/ .

CPRI is a trademark of Nokia.

IEEE publications are available from The Institute of Electrical and Electronics Engineers (https:// standards .ieee .org/ ).

The IEEE standards or products referred to in this clause are trademarks of The Institute of Electrical and Electronics Engineers, Inc.

IEEE Standard for Radio over Ethernet

Encapsulations and Mappings

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IEEE Std 1914.3-2018

IEEE Standard for Radio over Ethernet Encapsulations and Mappings

3. Denitions, acronyms, and abbreviations

3.1 Denitions

For the purposes of this standard, the following terms and denitions apply. The IEEE Standards Dictionary

Online should be consulted for terms not dened in this clause.

radio over Ethernet (RoE) de-mapper: A de-mapper that performs the task of extracting radio data from

Ethernet frames.

radio over Ethernet (RoE) eld: A eld that refers to a value within an RoE header.

radio over Ethernet (RoE) ow: An individual connection, identied by a ow identier, between two

specic RoE nodes.

radio over Ethernet (RoE) mapper: A mapper that performs the task of forming Ethernet frames from radio

data sources.

radio over Ethernet (RoE) object: An RoE mapper, RoE de-mapper, Ethernet link, Common Public Radio

Interface (CPRI™) port, forward and/or inverse Fast Fourier transform [(i)FFT] or physical random access

channel (PRACH) function.

radio over Ethernet (RoE) parameter: A value that describes how an RoE connection operates. Parameters

are enumerated to facilitate operation, administration, and maintenance (OAM) type-length-value (TLV)

control.

3.2 Acronyms and abbreviations

1PPS one pulse per second

AxC antenna carrier

BFN Node B frame number

CID IEEE company identier

C&M control and management

C-plane term used in the CPRI specication for the control plane

CPRI Common Public Radio Interface

DA destination address

E-UTRA evolved universal terrestrial radio access (3GPP)

eNB evolved Node B

FCS frame check sequence

FDD frequency division duplex

FDV frame delay variation

FEC forward error correction

FFT Fast Fourier transform

FTD frame transfer delay

IEEE Standards Dictionary Online is available at https:// dictionary .ieee .org/ .

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