关于EGPRS与EDGE的区别.docVIP

关于EGPRS与EDGE的区别 没错,理解是对的.我认为是EGPRS是EDGE的子集,是应该包含在大范围EDGE当中的.而EDGE的范围和技术含盖应该更广,如姚宁邮件的细节定义解释. 而我们平时测试当中一定是主要关注的EGPRS测试,所以会关注MODULATION(8PSK/GMSK);上下行(USF/ACK)与MCS(1~9)几个重要概念. EGPRS是EDGE的其中主要业务之一. en,按通俗的理解 ,edge和 egprs应该是一回事 Enhanced Data rates for GSM Evolution (EDGE), Enhanced GPRS (EGPRS), or IMT Single Carrier (IMT-SC) is a digital mobile phone technology that allows increased data transmission rates and improved data transmission reliability. EDGE is generally classified as 2.75G, although it is part of ITUs 3G definition[1]. EDGE has been introduced into GSM networks around the world since 2003, initially by Cingular (now ATT) in the United States.[2] EDGE can be used for any packet switched application, such as an Internet connection. High-speed data applications such as video services and other multimedia benefit from EGPRS increased data capacity. EDGE Circuit Switched is a possible future development. EDGE Evolution continues in Release 7 of the 3GPP standard providing doubled performance e.g., to complement High-Speed Packet Access (HSPA). Technology -on enhancement]] for 2G and 2.5G GSM and GPRS networks, making it easier for existing GSM carriers to upgrade to it. EDGE/EGPRS is a superset to GPRS and can function on any network with GPRS deployed on it, provided the carrier implements the necessary upgrade. Although EDGE requires no hardware or software changes to be made in GSM core networks, base stations must be modified. EDGE compatible transceiver units must be installed and the base station subsystem needs to be upgraded to support EDGE. New mobile terminal hardware and software is also required to decode/encode the new modulation and coding schemes and carry the higher user data rates to implement new services. Transmission techniques In addition to Gaussian minimum-shift keying (GMSK), EDGE uses higher-order PSK/8 phase shift keying (8PSK) for the upper five of its nine modulation and coding schemes. EDGE produces a 3-bit word for every change in