Terminology » Mobile Communication » WCDMA Terminology: Understanding Key Concepts in Wireless Communication

WCDMA Terminology: Understanding Key Concepts in Wireless Communication

wcdma wireless communication cdma umts protocol

This page describes terms related to WCDMA, including CDMA, WCDMA frame, WCDMA bands, TD-SCDMA, WCDMA router, UMTS, UARFCN, PN code, walsh code, spreading, WCDMA stack, HSDPA, HSUPA, UTRA, eNB etc.

WCDMA TermsBasic description
CDMACode Division Multiple Access, the technique by which different users can use the time and frequency resource at the same time for communication purpose. All the users are allocated different unique codes to help avoid collision and retrieve their information.
WCDMA frameThe frame structure defining various time intervals used for communication between eNB and UE.
WCDMA bandsThe frequency ranges used in WCDMA system by UEs and eNBs for communication.
TD-SCDMATime Division Synchronous Code Division Multiple Access, 3G standard used in china. It supports UMTS-TDD 1.28 Mcps frame structure.
WCDMA routerThe device which allows WCDMA compliant UE to use the WCDMA network service.
UMTSStands for Universal Mobile Telecommunications System
UARFCNUTRA Absolute Radio Frequency Channel Number
PN codepseudo noise code, the unique PN codes are assigned to eNB in CDMA system.
Walsh codeWalsh code is the example of spreading code used in CDMA. The unique walse codes are assigned to the UEs.
SpreadingSpreading refers to increase of the signal bandwidth. In CDMA, low bit rate information signal is multiplied with high bit rate PN codes to achieve this.
WCDMA stackThe set of rules for communication between UE and eNB as well as within the protocol layers of UE and eNB itself.
HSDPAHigh-Speed Downlink Packet Access
HSUPAHigh-Speed Uplink Packet Access
UTRAUMTS Terrestrial Radio Access
eNBevolved Node B, base station in CDMA is referred by this name.