1、 ETSI TR 102 944 V1.1.1 (2011-07)Technical Report Reconfigurable Radio Systems (RRS);Use Cases for Baseband Interfaces forUnified Radio Applications of Mobile DeviceETSI ETSI TR 102 944 V1.1.1 (2011-07) 2Reference DTR/RRS-02005 Keywords CRS, SDR ETSI 650 Route des Lucioles F-06921 Sophia Antipolis C
2、edex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important notice Individual copies of the present document can be downloaded from: http:/www.etsi.org The present docu
3、ment may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the
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5、tus.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be reproduced except as authorized by written permission. The copyright and the foregoing restriction exte
6、nd to reproduction in all media. European Telecommunications Standards Institute 2011. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members
7、 and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 102 944 V1.1.1 (2011-07) 3Contents Intellectual Property Rights 4g3Foreword . 4g31 Scope 5g32 References 5g32.1 Normative references . 5g32.2 Informative reference
8、s 5g33 Definitions and abbreviations . 6g33.1 Definitions 6g33.2 Abbreviations . 7g34 Information . 8g34.1 Background 8g34.2 Hardware/Software Framework . 9g35 Use Cases . 11g35.1 Use Case 1: Fixed Pipeline . 11g35.2 Use Case 2: Programmable Pipeline 12g35.2.1 Without the capability of User Defined
9、Function Block. 12g35.2.2 With the capability of User Defined Function Block 12g35.2.3 With additional capability for BBA to support the IR 13g35.3 Use Case 3: Hybrid Pipeline. 14g35.4 Use Case 4: Context information processing . 15g36 Challenges 17g37 Conclusion 17g3History 19g3ETSI ETSI TR 102 944
10、 V1.1.1 (2011-07) 4Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in ETSI SR 000 314: “In
11、tellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (http:/ipr.etsi.org). Pursuant to the ETSI IPR Policy, no investigation, incl
12、uding IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technical Report (TR) has been
13、 produced by ETSI Technical Committee Reconfigurable Radio Systems (RRS). ETSI ETSI TR 102 944 V1.1.1 (2011-07) 51 Scope The objective of the present document is to collect Use Cases that are needed for standardizing the BaseBand Interface (BBI) of Mobile Device (MD) that enables the MD to be config
14、ured into various radio applications. The Use Cases to be defined in the present document are related to the internal interface of Unified Radio Application (URA) which has been defined in i.1. In order to support the flexible configuration of MD into various radio applications, a standard set of ba
15、seband interfaces should be adopted in the URA of MD. Therefore, the present document suggests variety of Use Cases related to the configuration method using the standard interface to be defined later in ETSI TC RRS. The present document will suggest component level Use Cases not system level Use Ca
16、ses, which particularly means that the Use Cases to be specified in the present document are for supporting interoperations among baseband signal processing modules inside MD which are needed for multiradio application configuration of MD which adopts the standard baseband interface. 2 References Re
17、ferences are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced
18、 documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The fo
19、llowing referenced documents are necessary for the application of the present document. Not applicable. 2.2 Informative references The following referenced documents are not necessary for the application of the present document but they assist the user with regard to a particular subject area. i.1 E
20、TSI TR 102 680 (V1.1.1): “Reconfigurable Radio Systems (RRS); SDR Reference Architecture for Mobile Device“. i.2 ETSI TR 102 839 (V1.1.1): “Reconfigurable Radio Systems (RRS); Multiradio Interface for Software Defined Radio (SDR) Mobile Device Architecture and Services“. i.3 ETSI TR 103 062 (V1.1.1)
21、: “Reconfigurable Radio Systems (RRS) Use Cases and Scenarios for Software Defined Radio (SDR) Reference Architecture for Mobile Device“. ETSI ETSI TR 102 944 V1.1.1 (2011-07) 63 Definitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitio
22、ns apply: radio application package: package containing Radio Controller (RC) code, user defined function block code, and metadata needed for setting up and running radio application(s) NOTE: RC code is downloaded into application processor while the user defined function block is downloaded into ba
23、seband processor in accordance with the contents of the metadata. Metadata indicate which function blocks are to be combined in what order for implementing given radio application(s) in the baseband processor. Radio Controller (RC): software component performing the following functions: 1) transferr
24、ing context information from corresponding function block(s) in baseband processor to monitor; 2) transferring receive user data packet from Medium Access Control (MAC) buffer to networking stack; and 3) transferring transmit source data packet from networking stack to MAC buffer. NOTE: An RC perfor
25、ms also upper layer processing of radio application that operates in non real-time. The monitor, to which the context information is transferred, denotes an application that uses the context information in non real-time such as Mobility Policy Manager (MPM). An RC, which operates in application proc
26、essor in non real-time, can access function block, which operates in baseband processor in real-time, through driver which is prepared in application processor. BaseBand Interface (BBI): interface consisting of a Radio Application Interface (RAI) and a Context Information Interface (CII) NOTE: RAI i
27、s for baseband signal processing and CII is for transferring the context information to monitor. BBI includes: 1) function block definition of radio application; 2) interface among the function blocks; 3) interface between RC and each of corresponding function block(s). function block: each modem fu
28、nction needed for real-time implementation of radio application(s) NOTE: A function block includes not only the modem functions in Layer1 (L1), L2, and L3 but also all the control functions that should be processed in real-time for implementing given radio application(s). Function block is categoriz
29、ed into standard function block and user defined function block. In more details: 1) Standard function block can be shared by many radio applications. For example, Forward Error Correction (FEC), Fast Fourier Transform (FFT)/Inverse Fast Fourier Transform (IFFT), (de)interleaver, Turbo coding, Viter
30、bi coding, Multiple Input Multiple Output (MIMO), Beamforming, etc are the typical category of standard function block. 2) User defined function block includes those function blocks that are dependent upon a specific radio application. It is used to support special function(s) required in a specific
31、 radio application or to support a special algorithm used for performance improvement. In addition, the user defined function block can be used as baseband controller function block which is to control the function blocks operating in baseband processor in real-time and to control some context infor
32、mation that are to be processed in real-time such as Channel State Information (CSI). ETSI ETSI TR 102 944 V1.1.1 (2011-07) 7driver: set of software components that includes installer, loader, back-end compiler or full compiler (if necessary), standard function block pool (if necessary), and any oth
33、er components needed for setting up and running radio application(s) NOTE: A driver provides the following functions as well: 1) enabling RC, which operates in application processor mostly in non real-time, to access each of corresponding function block(s) operating in baseband processor in real-tim
34、e; 2) back-end compiler for translating platform-independent IR into vendor assembly in the case of using platform independent IR for user defined function block; 3) full compiler for compiling source code into vendor assembly in the case of using source code for user defined function block; 4) inst
35、aller for storing radio application package to storage device such as flash memory; 5) loader for loading RC code to application processor; and 6) loader for loading function block(s) code to baseband processor. A driver which is provided by a modem chip manufacturer is prepared in application proce
36、ssor and includes standard function blocks needed for the configuration of various radio applications. During the configuration of radio application, RC is loaded in application processor and standard function blocks and user defined function blocks are loaded in baseband processor in accordance wit
37、h the contents of metadata. It particularly means that Driver includes two loaders: one is to load RC in application processor and the other is to load the function blocks in baseband processor. Although there are varieties of modem chip vendors each of which has its own architecture and functioning
38、 in baseband processor, the RC which operates in application processor can access each of corresponding function block(s) in baseband processor using the driver which is provided in compliance with BBI by the modem chip vendor. Intermediate Representation (IR): code obtained as a result of compiling
39、 high level code with front-end compiler NOTE: IR is a non-executable code and independent of baseband processor. It is a structural and behavioural representation of radio application code. Since a user defined function block should be used in every kind of modem chip, user defined function block i
40、n radio application package is provided in IR in mid- or long-term scenario. The reason why user defined function block is to be provided in IR instead of executable code is to resolve the portability problem existing in executable code. When user defined function block is provided in IR (platform-i
41、ndependent), the user defined function block is translated into vendor assembly which is executable in a specific baseband processor using back-end compiler that is provided by modem chip manufacturer in the driver of application processor. vendor assembly: code obtained as a result of compiling the
42、 IR with back-end compiler NOTE: Vendor assembly is executable code and, thus, applicable only to a specific baseband processor. The back-end compiler is provided by modem chip provider because vendor assembly has to be prepared for each of baseband processors. In short, back-end compiler translates
43、 IR into vendor assembly, which can be ported on a specific baseband processor for which the back-end compiler translates IR. 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: BB BaseBand BBA BB Accelerator BBI BB Interface BPA Baseband Parameter Aggregat
44、ion CII Context Information Interface CSI Channel State Information FEC Forward Error Correction FFT Fast Fourier Transform GSM Global System for Mobile communications IFFT Inverse Fast Fourier Transform ETSI ETSI TR 102 944 V1.1.1 (2011-07) 8IR Intermediate Representation LTE Long Term Evolution MA
45、C Medium Access Control MD Mobile Device MIMO Multiple Input Multiple Output MPM Mobility Policy Manager MURI MUltiRadio InterfaceRAI Radio Application Interface RC Radio Controller RLC Radio Link ControlRRC Radio Resource Control RRS Reconfigurable Radio System RSSI Received Signal Strength Indicat
46、ion SDR Software Defined Radio TR Technical Report URA Unified Radio Application URAI Unified Radio Application Interface WiMAX Worldwide Interoperability for Microwave Access 4 Information 4.1 Background This clause describes the background and scope of Use Cases of BBI. Particularly, we are intere
47、sted in how the Use Cases to be discussed in the present document are related to the SDR architecture, Unified Radio Application Interface (URAI), and Multiradio Interface (MURI), which are the main topics of i.1 and i.2, respectively. Figure 1: Functional architecture of SDR equipment In i.1 and i.
48、2, the functional architecture of multiradio computer device has been shown as in Figure 1 that is based on the multiradio computer concept. The BBIs are related to the interfaces mainly in the Unified Radio Application (URA) shown in Figure 1 except the ones that are to be defined for transferring
49、the context information. ETSI ETSI TR 102 944 V1.1.1 (2011-07) 9Figure 2: Compile-time and run-time functions of Radio Computer Figure 2 illustrates compile-time and run-time functions of radio computer i.2. According to the scenario shown in Figure 2, radio program is built into radio package through radio compiler. Radio package contains not only the binary code of the radio program components but also metadata about the radio system. The loader component of the radio operating system will install and load radio packages into the execution environment of t
