C.C. Lee, "Random signal levels for channel access in packet broadcast networks," IEEE J. Select. Areas Commun., Vol.SAC-5, pp.1026-1034, July 1987.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....of packets. Metzner [7] has shown that by adapting two classes of users with different power levels the throughput of SALOHA can be improved from 0.368 to 0.53. Other possible performance improvements due to capture effect in various multiaccessing environments have been studied in [8] 14] Lee [15] has proposed a multiple access protocol which exploits power capture by adopting a set of transmit power levels and a probabilistic rule for selecting among these levels this allowing the users to increase the system throughput. Random power level selection approach has also been studied by Cidon ....

C.C. Lee, "Random signal levels for channel access in packet broadcast networks," IEEE J. Select. Areas Commun., Vol.SAC-5, pp.1026-1034, July 1987.

....much attention recently. Other examples that address both MAC and physical layer issues in wireless channels includes [19] and [16] the focus of these papers is on various techniques for exploiting multi user reception. Other work in this area includes work on power capture, such as [11] [8], and approaches that use channel coding to recover from collisions This pilot signal should be broadcast in the same coherence bandwidth as the uplink channel, as, for example, in a time division duplex system. 15] 12] We initially consider a backlogged system with n users, where each user ....

C. C. Lee, "Random Signal Levels for Channel Access in Packet Broadcast Networks," IEEE JSAC, vol. 5, pp. 1026-1034, July 1987.

....much attention recently. Other examples that address both MAC and physical layer issues in wireless channels includes [19] and [16] the focus of these papers is on various techniques for exploiting multi user reception. Other work in this area includes work on power capture, such as [11] [8], and approaches that use channel coding to recover from collisions This pilot signal should be broadcast in the same coherence bandwidth as the uplink channel, as, for example, in a time division duplex system. 15] 12] We initially consider a backlogged system with n users, where each user ....

C. C. Lee, "Random Signal Levels for Channel Access in Packet Broadcast Networks," IEEE JSAC, vol. 5, pp. 1026-1034, July 1987.

....performance of a slotted ALOHA system that uses multiple discrete power levels for a perfect capture model and for a simplified version of the signal to interference ratio capture model. However, he did not consider the problem of how to choose the power levels and transmission probabilities. Lee [9] analyzed a slotted ALOHA system with random power levels for a signal to interference ratio type of capture model. Lee assumed linearly equi spaced power levels and uniformly distributed transmit probabilities. The paper is organized as follows. In Section 2, we introduce and analyze the ....

C. C. Lee, "Random signal levels for channel access in packet broadcast networks," IEEE J. Select. Areas Commun., vol. 5, pp. 1026--1034, July 1987.

....performance of a slotted ALOHA system that uses multiple discrete power levels for a perfect capture model and for a simplified version of the signal to interference ratio capture model. However, he did not consider the problem of how to choose the power levels and transmission probabilities. Lee [9] analyzed a slotted ALOHA system with random power levels for a signal to 2 interference ratio type of capture model. Lee assumed linearly equi spaced power levels and uniformlydistributed transmit probabilities. Cidon, Kodesh, and Sidi [10] investigated questions of optimality for specific cases ....

....smaller than 0.54 (see Fig. 9) 4. 5 Comparisons with Other Approaches At this point in the presentation, the reader may wonder how important it is to use an optimal power pmf as opposed to some other choice, such as using linearly spaced power levels with uniform probabilities as was done in Lee [9]. We note here that the problem solved by Lee was somewhat different (i.e. it 19 included a noise term, used a capture ratio of one, and generally treated smaller dynamic ranges than we consider in this paper) so a direct comparison with his results is not possible. However, in the context of ....

C. C. Lee, "Random signal levels for channel access in packet broadcast networks," IEEE J. Select. Areas Commun., vol. 5, pp. 1026--1034, July 1987.

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C.C. Lee, Random Signal Levels for Channel Access in Packet Broadcast networks IEEE Sel. Areas Commun., 5 (6), 1026-1034, July 1987.

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