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Near-far effect on coded slotted ALOHA

Ehsan Ebrahimi Khaleghi, Cedric Adjih, Amira Alloum, Paul Muhlethaler
2017 2017 IEEE 28th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)  
Motivated by scenario requirements for 5G cellular networks, we study one of the candidate protocols for massive random access: the family of random access methods known as Coded Slotted ALOHA (CSA).  ...  Our results shed light on the behavior of the optimal distribution of repetitions in actual wireless networks.  ...  The authors would like to thank Vinod Kumar, Chandra Murthy, Mohit Sharma, and other partners of the project, for discussions and insights on the topic.  ... 
doi:10.1109/pimrc.2017.8292692 dblp:conf/pimrc/KhaleghiAAM17 fatcat:34hnjcnbijewjar7revh4mzqsm

Throughput of the Multi-hop Slotted Aloha with Multi-packet Reception [chapter]

M. Coupechoux, T. Lestable, C. Bonnet, V. Kumar
2004 Lecture Notes in Computer Science  
Capacity results show the great advantage of multi-packet reception and highlight the near-far resistance of the MUD scheme.  ...  We then consider several simple models for the computation of the r n,k , when spread slotted ALOHA is used.  ...  The spatial capacity of the slotted ALOHA protocol has been studied in [5] , where the effect of capture is detailed.  ... 
doi:10.1007/978-3-540-24614-5_22 fatcat:lexyvon2nzg7nlnpwvoyga2iju

Stability of mobile slotted ALOHA network with Rayleigh fading, shadowing, and near-far effect

C. van der Plas, J.-P.M.G. Linnartz
1990 IEEE Transactions on Vehicular Technology  
The near-far effect is highlighted, since the total network performance and the spatial distribution of the attempted traffic interact. TERMINAL MODEL 1-q 4 F: NETWORK MODEL (a)  ...  Queueing of packets in a mobile slotted ALOHA network with Rayleigh fading, shadowing, and UHF groundwave propagation is studied, using a finite Markov chain model.  ...  Shadowing is assumed superimposed on the near-far effect (7).  ... 
doi:10.1109/25.61357 fatcat:mca474u5oveztl6s2y2gowvrae

Capture probability and throughput analysis of slotted ALOHA and unslotted np-ISMA in a Rician/Rayleigh environment

I. Widipangestu, A.J.'T. Jong, R. Prasad
1994 IEEE Transactions on Vehicular Technology  
signal, which suffers from Rician fading and the near-far effect.  ...  Abstrucf-The performance of mobile radio communication systems is analyzed, in terms of the capture probability and throughput, for the slotted ALOHA and the unslotted np-ISMA (nonpersistent Inhibit Sense  ...  Also, the effect of BCH error correction codes on the performance is investigated.  ... 
doi:10.1109/25.312800 fatcat:qlxiv7zqr5dw7ns3wxwzm7huza

Exploiting capture effect in frameless ALOHA for massive wireless random access

Cedomir Stefanovic, Miyu Momoda, Petar Popovski
2014 2014 IEEE Wireless Communications and Networking Conference (WCNC)  
Specifically, we assess the impact of capture effect in Rayleigh fading scenario on the design of SIC-enabled slotted ALOHA schemes.  ...  This approach leads to throughput substantially higher than the one offered by the traditional slotted ALOHA.  ...  These differences are results of propagation phenomena, such as fading, shadowing and the near-far effect.  ... 
doi:10.1109/wcnc.2014.6952516 dblp:conf/wcnc/StefanovicMP14 fatcat:o4kpwquygrgsvmnb45tmas5tma

The ALOHA systems in shadowed mobile radio channels with slow or fast fading

A.U.H. Sheikh, Y.-D. Yao, X. Wu
1990 IEEE Transactions on Vehicular Technology  
In this paper, the influence of receiver capture on the performance of ALOHA in the presence of shadowing is investigated.  ...  Under fast fading conditions, the throughput can also be increased especially when error-correction coding is used.  ...  systems in Rayleigh fading channels is discussed in [6] and [7] , the near/far effect on ALOHA systems is studied in [8] and [9] , and the combined effect of fading and the near/far phenomenon has  ... 
doi:10.1109/25.61350 fatcat:xsd2qtdkxzajdegwmifdblvn4y

A Novel Algebraic Framework for Analyzing Finite Population DS/SS Slotted ALOHA Wireless Network Systems with Delay Capture

Mun Geon Kyeong Kyeong
1996 ETRI Journal  
Thus, consideration of the near-far problem is eliminated from the performance analysis.  ...  This range effect is unfair to the transmitters located far from the receiver.  ... 
doi:10.4218/etrij.96.0196.0032 fatcat:pabxsg6i35bqxmkxvvwpoysdyi

Adaptive S-ALOHA CDMA as an alternative way of integrating services in mobile environments

O. Sallent, R. Agusti
2000 IEEE Transactions on Vehicular Technology  
Code-division multiple-access (CDMA) schemes appear to be very promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility.  ...  Moreover, by means of a simplified cellular model, the proposed algorithm revealed the same behavior, i.e., it tries to select the most suitable transmission rate at any time slot, when it is affected  ...  Under these conditions, capacity is far higher than in S-ALOHA CDMA ( , according to Fig. 6) . B.  ... 
doi:10.1109/25.845110 fatcat:eb2f6oifi5ardey3bbyxrmgbp4

A Survey and Tutorial of RFID Anti-Collision Protocols

Dheeraj K Klair, Kwan-Wu Chin, Raad Raad
2010 IEEE Communications Surveys and Tutorials  
A key one being tag collision, which occurs when multiple tags reply simultaneously to a reader. As a result, an RFID reader experiences low tag reading performance, and wastes valuable energy.  ...  A key one being tag collision, which occurs when multiple tags reply simultaneously to a reader. As a result, an RFID reader experiences low tag reading performance, and wastes valuable energy.  ...  Principle (Near or far Field) (Far Field) Tag generates electromagnetic waves on their own.  ... 
doi:10.1109/surv.2010.031810.00037 fatcat:untvt65v5fbvjlpolyxtbdxzoa

Using CDMA as Anti-Collision Method for RFID - Research & Applications [chapter]

Andreas Loeffler
2011 Current Trends and Challenges in RFID  
An extension of the ALOHA protocol, called slotted ALOHA (Roberts, 1975) introduces time slots in which the transmitter must send its data at the beginning.  ...  RFID systems based on the principle of pure ALOHA are, e.g., based on the TTF principle, i.e., transponder-talks-first.  ...  One possibility to reduce the near-far effect is the usage of Huffman sequences (Liu & Guo, 2008) .  ... 
doi:10.5772/16830 fatcat:vtwjjejbzvdzrns3ffnex7slrq

Contention Resolution in Random-Access Wireless Networks Based on Orthogonal Complementary Codes

X. Li
2004 IEEE Transactions on Communications  
Specifically, system throughput approaches the offered load up to the maximum value one with improved average packet delay performance.  ...  Using orthogonal complementary codes to design access-request packets, users can reserve channel access successfully, even in severe contentions.  ...  Transmission can be asynchronous with near-far (NF) propagation and frequency-selective fading. Channels are assumed time invariant within each access-request slot. A.  ... 
doi:10.1109/tcomm.2003.822173 fatcat:2yijfmpkbnd65jkq5dbkb5xz54

Random Access over Wireless Links: Optimal Rate and Activity Probability Selection

Nurullah Karakoc, Tolga M. Duman
2017 GLOBECOM 2017 - 2017 IEEE Global Communications Conference  
In this paper, we consider a random access scheme over wireless fading channels based on slotted ALOHA where each user independently decides whether to send a packet or not to a common receiver at any  ...  We consider two scenarios: classical slotted ALOHA where no multi-user detection (MUD) capability is available and slotted ALOHA with MUD.  ...  SYSTEM MODEL We consider slotted ALOHA over a communication medium characterized as a wireless channel with path-loss and small scale fading effects.  ... 
doi:10.1109/glocom.2017.8254951 dblp:conf/globecom/KarakocD17 fatcat:52otvmoktreh3h4lllflvinq44

Near-far effects in land mobile random access networks with narrow-band Rayleigh fading channels

J.-P.M.G. Linnartz, R. Hekmat, R.-J. Venema
1992 IEEE Transactions on Vehicular Technology  
The near-far effect of random access protocols in mobile radio channels with receiver capture is investigated.  ...  ALOHA, carrier sense multiple access (CSMA) or inhibit sense multiple access (ISMA) protocols.  ...  Slotted ALOHA is seen to result in the most significant near-far unfairness because of prevailing packets from nearby users.  ... 
doi:10.1109/25.120148 fatcat:ktgrycmyj5dvlar5ngkmyh4mum

On the design of universal schemes for massive uncoordinated multiple access

Austin Taghavi, Avinash Vem, Jean-Francois Chamberland, Krishna R. Narayanan
2016 2016 IEEE International Symposium on Information Theory (ISIT)  
Researchers have noted the analogous relationship between erasure coding theory and slotted ALOHA based multiple access schemes.  ...  In this thesis, we carry on with this line of research, and extend the work to consider slotted ALOHA based schemes with the constraint that the number of users in the system is not known.  ...  The kind of erasure codes that are directly applicable to slotted ALOHA are fountain codes [11] .  ... 
doi:10.1109/isit.2016.7541318 dblp:conf/isit/TaghaviVCN16 fatcat:rjtu4j736fhdlclvwpr3nccida

The Approaches in Solving Passive RFID Tag Collision Problems [chapter]

Hsin-Chin Liu
2010 Radio Frequency Identification Fundamentals and Applications Bringing Research to Practice  
Every object can be detected as one form of an electronic code. At the beginning, the main purpose of RFID tag usage is meant to be an improvement of barcodes.  ...  In this chapter, we focus on the latter one.  ...  A Transponder Anti-collision Algorithm Based on a Multi-Antenna RFID Reader, Proceedings of 2nd Information and Communication Technologies, ICTTA '06. , pp. 2684-2688. References  ... 
doi:10.5772/7988 fatcat:dpsllwx5n5dgjds5tclep4o4bi
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