TDMA for North American PCS systems

Garg, Vijay K.; Sneed, E.L.

doi:10.1002/bltj.2075

Cited by 3 publications

(3 citation statements)

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“…Several variants of the TDMA protocol is used in practice for different applications. One such comparison is made in Reference [11] between two personal communications services, namely DAMPS-1900 and PCS-1900.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of algorithms for efficient partitioning and scheduling of data bursts in satellite communications

Jutty

Ghawghawe²,

Ghose

et al. 2005

Int. J. Satell. Commun. Network.

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SUMMARYWe evaluate four scheduling algorithms for satellite communications that use the Time Division Multiple Access methodology. All the algorithms considered are based on the open-shop model. The open-shop model is suitably represented or modified to exploit some existing algorithms to solve the satellite communication problem. In the first two algorithms, namely pre-emptive scheduling with no intersatellite links and greedy heuristics with two intersatellite links, a (traffic) matrix representation of the open-shop model is used to get a near optimal schedule. In the next two algorithms, generalized heuristic algorithm and the branch and bound algorithm, the open-shop model is modified to accommodate the inter-satellite link and this modified open-shop model is used to solve for a near optimal schedule. The basic methodology of all the algorithms are briefly described and their performance was evaluated through extensive simulations. The performance criteria to evaluate the algorithms are}run time of the algorithms, schedule lengths, and optimality of the algorithm against theoretical bounds. Three of the abovementioned algorithms are evaluated by comparing the performance criteria under similar conditions. Optimal branch and bound algorithm is not evaluated due to its high complexity. The general heuristic algorithm is found to give a good trade off between computation time and optimality. The computation time is comparable with the pre-emptive scheduling algorithm and greedy heuristic algorithm and the schedule length achieved is near to the lower bound value.

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Section: Introductionmentioning

confidence: 99%

Evaluation of algorithms for efficient partitioning and scheduling of data bursts in satellite communications

Jutty

Ghawghawe²,

Ghose

et al. 2005

Int. J. Satell. Commun. Network.

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“…In the TDMA system data from subscriber is in slots and each slot is expressed as time intervals while a number of slots are composed into a frame. Majority of TDMA systems adopt time division multiplexing which comprises of several time-divisions multiplexed onto a TDMA bit streams [2]. "The data is transmitted via radio carrier from a base station to several active mobiles in the downlink.…”

Section: Introductionmentioning

confidence: 99%

“…"The data is transmitted via radio carrier from a base station to several active mobiles in the downlink. In the reverse direction (Uplink), transmission from mobiles to base station is time sequenced and synchronized on common frequency for TDMA" [2].…”

Section: Introductionmentioning

confidence: 99%

The Probability of Bit Error Due to the Co-existence Interference of PCS1900 and UMTS

Sivaraks¹,

Malisuwan²

2013

IJMO

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Abstract-An efficient network is critical to support the rapid growth in traffic on mobile networks, since current network PCS1900 (2G) cannot support such a huge demand. The objective of the third-generation (3G) UMTS (Universal Mobile Telecommunication System) of wireless communication is to provide high speed wireless communication to support multimedia, large data, and video.However, the co-existence of the two mobile radio systems (PCS1900 and UMTS) which share the same frequency band leads to a major issue. A serious issue of co-existence occurs when the downlink of the system is closer to the frequency bands of the concerned system. The PCS-1900 downlink band (1,930-1,990) and WCDMA (UMTS) uplink band (1,920-1,980) widely overlap, which causes interference between UMTS mobile unit and PCS-1900 base station. Therefore the objectives of this paper is to study the effect from PCS 1900 base station interference on UMTS mobile unit performance in terms of the probability of bit error by developing the Probability of bit error equation of DSS-QPSK from the existing Probability of bit error equation. This paper also evaluates the degradation of UMTS mobile unit performance in terms of probability of bit error when the system is interfered by PCS1900 base station.Index Terms-Bit error, co-existence on network, DSS-QPSK, PCS 1900, UMTS.

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Time‐Division Multiple Access

Chan¹

2007

Handbook of Computer Networks

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TDMA for North American PCS systems

Cited by 3 publications

References 1 publication

Evaluation of algorithms for efficient partitioning and scheduling of data bursts in satellite communications

Evaluation of algorithms for efficient partitioning and scheduling of data bursts in satellite communications

The Probability of Bit Error Due to the Co-existence Interference of PCS1900 and UMTS

Time‐Division Multiple Access

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