Network Vip

Method of testing of agreement index of TD-SCDMA system

Li Guang Gao JianQing

Information network Limited Company of broadcast and television of Shaanxi

Shaanxi. Xi’an 710068

[Summary ] has narrated the method of testing of international index of TD-SCDMA system and tested the project and course tested, provide the course intactly for TD-SCDMA system testing.

[TD-SCDMA agreement test of keyword ] Test the project TSM terminal agreement test

- synchronous code division multiple access is inserted TD-SCDMA Time division-synchronous code division multiple access time The system is two kinds of flexible combination that basically transmitted the mode of TDMA and CDMA, it is also by China wireless communication standardized organization CWTS 3G wireless communication standard put forward and passed by international ITU. Call low yards of blocks of speed TDD working way too inside 3GPP ‘ Equal UTRA TDD of 3.84MHZ . TD-SCDMA system is especially suitable for the compact district of urban population and offer density high-capacity speech, data and multimedia business. The system very single group’s network can also use with other wireless access technologies to run. TD-SCDMA has unique characteristics: 1 TDD way is easy to offer the asymmetrical business, TD-SCDMA system working under TDD mode transmits basic TDMA in the time frame with repeated periodicity the pulse happens suddenly, through periodically changing and transmitting the direction, the upper, down chain of hocketting is transmitted on the same signal carrier. 2 Intellectual aerial is at the intersection of TD-SCDMA and system and down channel use the same carrier frequency, up and down radio frequency channel at all symmetrical, favorable to intellectual use of aerial ‘ Used in the base station . 3 Jointly detect, TD-SCDMA system interferes with the limited system, the system interferes with including disturbing multipath and small, the multi-user interferes with in the Residential Area and little and interval interference. 4 Synchronous CDMA means the signal sent out in up chain every terminal station and totally moves ahead simultaneously at base station demodulator, will not produce much location to interfere with each other, has improved capacity and spectral utilization ratio of TD-SCDMA system. 5 The radio of software utilizes the digital signal to deal with the technology of realizing wireless function finished of the software by the circuit of the hardware, can realize different hardware functions through loading different software. 6 TD-SCDMA is easy to realize by the smooth transition of GSM system, can support various to run side by side and bear the weight of.

The agreement tests it is a kind of ink horn that tests and tests and only cares about input and output to test software, test ability though tests weakly course is relatively simple a little, do not have a special requirement to the software examined. It observes through controlling and is examined the agreement the external behavior realized and comments on it according to the agreement standard. Agreement test is divided into 4 respects and carried on research at present: Consistency test conformance testing , operation tests interoperability testing each other , function test performance testing , and tightness test robustness testing . Consistency test mainly tests the agreement realizes that lax follows the corresponding agreement standard; Judge the agreement of the networking products is international standards not in accordance with agreement; It is the most basic content that an agreement tests; Mutually connecting the question when realized of different agreements to the same agreement standard that the test of interoperability pays close attention to; Observe various performance parameters that the agreement realizes examined by experiment method in function test; Hard

Firm test measures the ability that the agreement entity or system operates in various abominable environments.

Whether the products realized by the agreement of verification of agreement test are that correct the first step is that norm realized and based on to guarantee the products keeps unanimity, this course is called consistency test. In fact, the main purpose of consistency test is to confirm the products comply with the normal requirement, and reduce the products at the scene ‘ Such as TD-SCDMA terminal station Risk of making a mistake while running.

A complete method of testing defined with the border standard by ISO 9446 in consistency test. According to the stipulations of ISO 9646 consistency test methodology, it is tested that the standard includes 3 parts: Abstract test is collected ATS, Abstract Test Suite , the agreement realizes the causing explanation PICS Implement additional information PLXIT with the agreement . Can carry out and test the collection Produce on the basis of the above-mentioned 3 parts. Such as the key step of consistency test of Fig. 2, describe as follows in detail:

ATS: Test the collection abstractly, it is a text which describes the course, it offers the norm of testing one.

PICS: Agreement realize prove used for explaining and implementing requirement, ability and can select situation of implementation unanimously.

PIXIT: The agreement implements additional information, is used for offering the agreement parameter that must be indicated while testing.

ETC: Can carry out and test the collection, it is the test that collects software and realizes the body.

IUT: The agreement examined is realized, mean a real open system will carry on that part of consistency test, realization that it should be one or more OSI agreements. It examines into IUT systems includes to be can one-layer IUT ‘ Only one layer of system examined is tested Or multi-layer IUT ‘ Examine and there is adjacent layer of a series of looks that needs testing in the system ,Ability and can select situation of implementation.
The test of interoperability is the next step of consistency test. Consistency test is to prove systems A and systems B comply with the agreement norm, but in what big intensity systematic A and systematic B does interoperability test examine

Can work each other. The key step of test of interoperability is as follows:

1 Apply the situation in real environment in norm through predicting, define that tests the purpose, mean ATS;

2 Realize ETS according to ATS;

3 Carry out ETS on the analysis instrument of the agreement, test two or a plurality of systems to be measured;

4 Tested the course gets the test report, find the mistake of the system to be measured.

There are many similar places to mutually operate function test and consistency test, ATC and ATS of two kinds of test are both very alike, the main difference of the two should lie in consistency test is only to testing in one IUT, but interoperability test needs to test two or a plurality of systems to be measured.

Interoperability test the intersection of TSM and terminal and base station in one typical application until the intersection of TSM and terminal station test ‘ Network The test of communication, mainly reflect in the terminal agreement on the consistency of understanding to the agreement.

PH interface finishes the control signal transmission and communication of business datum between HL1 and DL module. The data exchanged mostly need sending through aerial interface or data that the interface receive in the sky of clump.

MPH interface responsible for the control information transmission between RRM and HL1 module. The information of control involves one layer of parameter measurement of wireless resource management, physics,etc..

DL interface responsible for the transmission of control information and news of layer 3 between RRM and DL module.

RR interface finish, insert the intersection of layer and 3 news of layer, transmit, RR layer with insert between the layer among the layer It control it distribute by TSR module information exchange, these signal with in turn into by inserting by layer corresponding.

MM interface finishes the signal transmission among MM and RRM module, CM module and MMI environment, these signals are distributed and changed trains by TSR module.

CM interface finishes the signal transmission among CM and MM module, RRM module and MMI environment, these signals are distributed and changed trains by TSR module

PHI interface finishes one layer of environments DSP of HL1 module and physics During control signal and business datum exchange.

MMI interface finishes the signal transmission among MMI environment and CM module, MM module RRM module.

CMMI interface finishes CM module to the transmission of the call control signal of MMI environment, this interface is unidirectional.

MMSIM interface finishes the information transmission between MM module and SIM card environment.

CC son’s test on the floor

1 MO calls out ‘ Caller Test that is set up and released;

2 MT calls out ‘ Let Test that is set up and released;

3 After calling out and setting up, the test of other functions, such as the test of DTMF news transmission function in the conversation course;

4 In the course of calling out and setting up or in the conversation course, after calling out and becoming abnormal, call out the test that is rebuilt;

5 Test of CC many embodiments.

MM son’s test on the floor

1 Test of selecting the net course;

2 TMSL and value assigning TMSL reallocationing Test;

3 Right of the ancient bronze mirror Authentication Test,test including accept ancient bronze mirror right and it is that the rights refuse in ancient bronze mirror;

4 The identity is discerned Identification Test,including being it is can last length short than lengths maximum situation of IMSI not to last MS;

5 The position upgradesLocation updating Test of course, including position upgrade accept, refuse, abnormal condition, the intersection of T3240 and release, test that periodic position upgrades overtime, and ATTACH course and periodic seat upgrade and are mixed with the test of the situation each other;

6 The test that MM connects, including the tape is encrypted Ciper MM connect to set up, bring encryption Ciper MM connect and set up, connect at MM set up refuse, connect to set up to refuse MM to last test of overtime such as T3230 while setting up to Cause4, MM, and the test that the network ABORTMM connects with and test of Follow-on Request Pending;

7 And does not have SIM card, and some test that can be read and can’t be read in SIM with the test of SIM card interface, including SIM card.

RR son’s test on the floor

1 The test chosen in Residential Area, including hindering Barrd Test, choose the test of PLMN, C1 of the Residential Area, <0?????,???????????????,????????????;

2 Normal and idle test, including test that is measured in neighbouring Residential Area, Residential Area of the service, test that paging responds to;

3 Test selected again in Residential Area, including the test judging Residential Area Singapore, select it in the course again in the Residential Area, the test of the selected PRI of Residential Area, select the test that succeeds again in the Residential Area, select again unsuccessfully to return to the test selected again in Residential Area in the Residential Area;

4 Insert the test of allowing;

5 Appoint the test of the course immediately, the intersection of SYNCI and course, insert course, appoint, succeed, appoint refuse, abnormal condition, appoint test of the T3122 overtime refuse, immediately immediately immediately at random;

6 The test of paging, including test of paging mode, paging type;

7 Connecting the mode, measuring report sending, channel mode changes the course, channel to appoint the course, switch over the course, encrypts the mode and sets up the course, type Classmark Inquire the test of the course;

8 RR connects test of releasing the course, including the test that is released normally;

9 The test of the idle mode of returning from connecting the mode, including carrying on the test selected again or chosen in the Residential Area in Residential Area after returning to the test of the Residential Area at present, unusually releasing after releasing normally.

Cheng Zhong carried on world to define OSI9646 international standard, it is TTCN that has obtained world-wide standardization and organized and tested the approval of the committee, it is widely applied to the test of the communication protocol, TTCN is that the tree table combines a kind of standardized AST of the sub law of tables and describes languages, so, while realizing TD-SCDMA terminal agreement on the senior level, adopt the products SDL AND TTCN SUITE4.0 of TELELOGIL AB TAU as the developing instrument, it is one that collects emulation, develops, tests in the integrative software tool, can be by emulation test and online test.

For example: A imaginary X agreement and its ITU, the need users who it involves define the new data type, define the timer, the variable, the constant, ASP uses PDU, uses and defaults the dynamic behavior in the definition. As shown in Fig. 3.

Fig. 3 X agreement model

Show because of Fig. 3, X agreement is in the N layer on the floor of the agreement, with the upper strata N 1 Layer has a business access point U-SAPI, and the lower floor N-1 Layer has two business access points. LD-SAPI is used for data transmission, LC-SAPI is used for controlling, as shown in Table 4.

As shown in Table 4 the function of X agreement, suppose that connects setting up, can send and accept the data directly, and suppose the lower floor does not always have mistake that happens, so test that does not consider the lost situation of the piece of the data; Receive from upper strata SDU, segment as Section of 20Byte greater than SDU of 20Byte, then in addition, BSN and LI assemble wait for, send for PDU, new BSN begins from 0, finishes by stage the serial number of BSN is 7s, if have for a while, the serial number of this section is 7. Control SDU to always have one, do not need to segment; Receive L-Ctrl-readytosend that the lower floor came, begin to send PDU assembled, puts sendnumbers =1,Except for PDU can be sent, sendnumbers is put =0,Control one to have high PRI; L-Ctrl-readytosend of the lower floor is always that 20ms sends once; Receive the data that the lower floor comes, and assemble the data piece that is the same upper strata PDU, send to the upper strata. Its purpose is to recommend how to test the example through TTCN structure through it.

So, it is very important verification when doing the experiment network as the guider who develops and studies TD-SCDMA, for the steady, reliable, high-efficient work of the system, we should prove that just there is a good apparatus through the experiment of several ten thousand times.

References

[1]TSM0408: china wireless telecommunication standard; 3G digital cellular telecommunications system mobile radio interface layers3 specification .

[2]TSM0508: china wireless telecommunication standard.

[3]TD-SCDMA the third generation of mobile communication systems, letters make and realize Li XiaoWen Li Gui is brave,etc.

Author’s profile:

Li Guang 1976-,Male, native in the Inner Mongol, post / professional title, engineer, mainly engaged in SP30CN of Datang Communication, the whole course of debugging from MS-BTS-BSC-TRAU-MSC of debugging and Siemens LMT software of the routers of SP30iEXE, SP30 leading exchanger and CISCO. Do technology, research and development and system testing and debugging of digital TV of TV conference system of video-information at present and do the system testing of TD-SCDMA at the same time.

Contact address: Xi’an 363 No. movie