A Secret Weapon For IMS (IP Multimedia Subsystem)
Radio Network Planning and Optimisation for UMTS comprehensively describes tips on how to dimension, strategy and optimise UMTS (Universal Mobile Telecommunications Process) networks. It introduces the properties in the spread spectrum technique and provides a general overview from the Actual physical layer of UTRA FDD. The radio network scheduling process for WCDMA is Obviously presented and thorough information on how you can dimension, program and rollout a 3G network, the two theoretically and practically is presented.
There's no tender handover and consequently pico-cells overlap in same constructing and can generate self interference
Technological know-how has advanced a number of times over since ISA-ninety five was established in the mid-nineteen nineties, even so the standards framework presents an abstract design that accommodates a wide range of systems and techniques.
A frame of bits is passed via a convolutional encoder, introducing ahead mistake correction redundancy, producing a frame of symbols. These symbols are then spread with the Walsh and PN sequences and transmitted.
抗干扰能力 ：通过扩展信号频谱，减少了信号的能量密度，提高了信号对噪声和干扰的抵抗力。
3GPP2 is additionally linked to the development of foreseeable future wi-fi interaction systems, including the 4G LTE and 5G standards.
It's used to avoid interference, spying and jamming. The spreading code made use of is understood to transmitter and receiver only.
Персональные инструменты Вы не представились системе
流量控制： 通过流量控制，保证切换过程中的数据传输速率，避免切换过程中的拥塞。
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Less than IS-95B P_REV=5, it was possible for just a consumer to make use of up to 7 supplemental "code" (targeted traffic) channels website simultaneously to increase the throughput of the data call. Very few mobiles or networks ever provided this attribute, which could in theory offer 115200 bit/s to the user.
This progression was the fruits of collaborative attempts involving telecommunications gear producers, standards corporations, and mobile network operators.