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[clarification needed] The technology of CDMA was used in 1957, when the young military radio engineer Leonid Kupriyanovich in Moscow made an experimental model of a wearable automatic mobile phone, called LK-1 by him, with a base station. [8] LK-1 has a weight of 3 kg, 20–30 km operating distance, and 20–30 hours of battery life.
For example, user A and user B both try to access a quiet link at the same time. Since they detect a collision, user A waits for a random time between 0 and 1 time units and so does user B. Let's say user A chooses a lower back-off time. User A then begins to use the link and B allows it to finish sending its frame. If user A still has more to ...
UTRA-TDD (Time Division Duplex), on the other hand, combines CDMA with TDMA and TDD. In this scheme, the same frequency band is used for both uplink and downlink, but at different times. This time-based separation is particularly advantageous in scenarios with asymmetric traffic loads, where the data rates for uplink and downlink differ ...
Road Transport. Nellore bus station of the city operates district and long-distance services. [9] Government is planning to demolish the present APSRTC bus stand and erect a new structure in couple of years, such that the new bus station will house commercial establishments, offices and multiplex and would generate internal revenues for RTC. [10]
cdmaOne network structure. The IS-95 standards describe an air interface, [1] a set of protocols used between mobile units and the network. IS-95 is widely described as a three-layer stack, where L1 corresponds to the physical layer, L2 refers to the Media Access Control (MAC) and Link-Access Control (LAC) sublayers, and L3 to the call-processing state machine.
In digital communications, a chip is a pulse of a direct-sequence spread spectrum (DSSS) code, such as a pseudo-random noise (PN) code sequence used in direct-sequence code-division multiple access (CDMA) channel access techniques.
Demand Assigned Multiple Access (DAMA) is a technology used to assign a channel to clients that do not need to use it constantly. DAMA systems assign communication channels based on news issued from user terminals to a network security system.
TDS – Technical Data Sheet Telcordia. TIA – Telecommunications Industry Association TIA-2000. TIA-41 – Cellular Radio-Telecommunications Intersystem Operations TIA-856. TIA-878. TLDN – Temporary Local Directory Number TMSI – Temporary Mobile Station Identity Triple DES – Triple Data Encryption Standard Trading Partner Agreements