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原文传递 RESULTS of an INITIAL TEST of DEDICATED SHORT-RANGE COMMUNICATIONS (DSRC) 5.850 -5.925 GHz PROTOTYPE EQUIPMENT

题名：	RESULTS of an INITIAL TEST of DEDICATED SHORT-RANGE COMMUNICATIONS (DSRC) 5.850 -5.925 GHz PROTOTYPE EQUIPMENT
作者：	Broady Cash
关键词：	RESULTS; INITIAL TEST; DEDICATED SHORT-RANGE COMMUNICATIONS; DSRC; EQUIPMENT
摘要：	2 In May 1997 the Intelligent Transportation Society of America submitted a petition to the FCC requesting allocation of the 5.850 - 5.925 GHz band for DSRC use. ARINC, under the Federal Highway Administration Communications Alternatives Test and Evaluation contract, developed a test program to determine the communications characteristics of 5.850 - 5.925 GHz DSRC equipment operated in configurations that would support many of the proposed applications. This paper describes the results of some of the tests that have been performed so far. The configurations that were used were similar to those used in applications such as: Electronic Toll Collection (ETC), In-vehicle Signing, and Traffic Network Performance Monitoring. This test series consisted of two basic types of tests. Performance tests examined the overall communications performance in a particular operational scenario but in a fairly controlled environment. And, interference tests assessed the separation required between DSRC installations to avoid mutual interference. The suite of test equipment consisted of a Roadside Test System (RTS) and an In-Vehicle Test System (IVTS). The test suite automatically collected and stored the test data. The data was used to generate the communication parameters summarized below. · Signal power level received by an onboard unit (OBU) and the time when this power level was measured (All tests), · Distance from the beacon, and · Time when a message from the vehicle was received at the roadside. The data collected was used to compute the following communication parameters. These measurements provide information that is important to DSRC application planning. · Communication zone (Z)—Distance, in feet, along the center of the lane in which the power level is large enough for the transponder to receive messages from the beacon and transmit messages back to the beacon with the required error rate. · Error rate (E)— Number of messages that were not received divided by total number of messages sent while the vehicle was in the communication zone. This count started after the beacon received the communications link identification from the transponder. · Throughput (T)—Number of bits of data sent between the beacon and the transponder divided by the time (in milli-seconds) that the transponder was in the communication zone. Throughput is measured, for a specific data rate setting, after the beacon receives the communications link identification from the transponder and does not include the transponder and beacon application processing time. The information collected during these tests will be used to help the Federal Communications Commission (FCC) formulate rules governing the use of the equipment in the United States.
总页数：	ITS America. Meeting (9th : 1999 : Washington, D.C..). New thinking in transportation : conference proceedings. 1999. pp23
报告类型：	科技报告