Performance analysis of multiple access protocols for CDMA cellular and personal communications services

Zhang, Z.; Liu, Y.-J.

doi:10.1109/infcom.1993.253383

Cited by 14 publications

(4 citation statements)

References 5 publications

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“…In the PRS 2 -CDMA protocol, the operation of the data subsystem is similar to the slotted CDMA_ALOHA scheme [11]. The data subsystem does not use the reservation scheme but the spreading code status-sensing scheme.…”

Section: Operation Of Data Subsystemmentioning

confidence: 99%

A Medium Access Control Protocol for Voice/Data Integrated Wireless CDMA Systems

Lim¹

2001

ETRI J

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In this paper, a medium access control protocol is proposed for integrated voice and data services in wireless local networks. Uplink channels for the proposed protocol are composed of time slots with multiple spreading codes per slot based on slotted code division multiple access (CDMA) systems. The proposed protocol uses spreading code sensing and reservation schemes. This protocol gives higher access priority to delay-sensitive voice traffic than to data traffic. The voice terminal reserves an available spreading code to transmit multiple voice packets during a talkspurt. On the other hand, the data terminal transmits a packet without making a reservation over one of the available spreading codes that are not used by voice terminals. In this protocol, voice packets do not come into collision with data packets. The numerical results show that this protocol can increase the system capacity for voice service by applying the reservation scheme. The performance for data traffic will decrease in the case of high voice traffic load because of its low access priority. But it shows that the data traffic performance can be increased in proportion to the number of spreading codes.

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Section: Operation Of Data Subsystemmentioning

confidence: 99%

A Medium Access Control Protocol for Voice/Data Integrated Wireless CDMA Systems

Lim¹

2001

ETRI J

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“…Each of these classes will exhibit a large variety of characteristics and inherent requirements, such as transmission rate, maximum tolerable bit error rate (BER), and timeout specifications. Because of the expected variability in the transmitted traffic, it is predicted that traditional voice-based medium access control (MAC) protocols such as [7], [25], [29] would perform poorly in future wireless networks. What is required is a new generation of highly flexible MAC protocols that can easily adapt to the changing conditions and requirements of projected multimedia traffic over future wireless networks.…”

mentioning

confidence: 99%

A slotted CDMA protocol with BER scheduling for wireless multimedia networks

Akyildiz

Levine²,

Joe

1999

IEEE/ACM Trans. Networking

163

150

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Abstract-In future wireless multimedia networks, there will be a mixture of different traffic classes which have their own maximum tolerable bit error rate (BER) requirements. In this paper, a novel medium access control (MAC) protocol called wireless multimedia access control protocol with BER scheduling (in short form, WISPER) for CDMA-based systems is proposed. WISPER utilizes the novel idea of scheduling the transmission of multimedia packets according to their BER requirements. The scheduler assigns priorities to the packets, and performs an iterative procedure to determine a good accommodation of the highest-priority packets in the slots of a frame so that packets with equal or similar BER requirements are transmitted in the same slots. The proposed WISPER protocol has been validated using a software emulator on the cellular environment. Performance evaluation results based on the implementation are also included in the paper.

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“…Many MAC protocols have been developed to support speech and data traffic and can be found in [12-181. Other MAC protocols that have considered multimedia traffic can be found in [9,[19][20][21][22], but these did not include either QoS or priority considerations. Investigations of MAC protocols for ad hoc networks can be found in [23-251. In this survey, we present proposals for third-generation TDMA and CDMA MAC protocols for wireless networks carrying multimedia traffic.…”

mentioning

confidence: 99%

Medium access control protocols for multimedia traffic in wireless networks

et al. 1999

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This article presents a survey on medium access control protocols for multimedia traffic in wireless networks. A basic o v e r v i e w o f MAC p r o t o c o l concepts i s presented, a n d a f r a m e w o r k i s d e v e l o p e d o n w h i c h t o b a s e q u a l i t a t i v e comparisons. The M A C protocols covered in this article include third-generation TDMA and C D M A schemes intended for use in a single-hop wireless system. The operation of each protocol i s explained, and its advantages and disadvantages are presented. Finally, a qualitative comparative outline of the discussed protocols is provided, based on multimedia traffic requirements.ne of the driving forces of the next generation of wireless communication and computing networks is the promise of high-speed multimedia services. Third-generation systems, such as the International Mobile Telecommunication System (IMT-2000) network (formerly known as the Future Public Land Mobile Telecommunication System, FPLMTS) and the Universal Mobile Telecommunication System (UMTS), promise to provide multimedia services to mobile and fixed users via wireless access to the global telecommunications infrastructure [l, 21. The IMT-2000 is a universal, multifunction, globally compatible digital mobile radio system that plans to integrate all traffic types and all wireless systems under a common set of formats. The standards for IMT-2000 Available bit rate (ABR) traffic (non-time-critical data) Unspecified bit rate (UBR) traffic (file transfer, system backup, e-mail) In a wireless system consisting of a number of mobile terminals that transmit traffic of any type on a shared medium to a centralized base station, a procedure must be invoked to distribute packet transmission among all users. This procedure is known as a medium access control (MAC) protocol. MAC protocols are often classified according to their method of resource sharing, as well as their multiple access technology [4]. The resource sharing methods include dedicated assignment, random access, and demand-based assignment. Dedicated channels assign each user a predetermined and fixed allocation of resources, regardless of the user's need to transmit. Dedicated assignment schemes are appropriate for continuous traffic, but can be wasteful for bursty traffic. On the other hand, random access channels allow all users to contend for the channel by transmitting as soon as packets are available to send. Random access is suitable for bursty data traffic, but is not desirable for delay-sensitive traffic. Demand-based assignment schemes assign resources according to requests, or reservations, submitted by users. Once the requests are transmitted (using either dedicated or random access channels) and processed, users can be assigned resources according to the results. Demand-based channels are useful for variablerate traffic and the hybrid conditions of multimedia traffic. However, the additional overhead and delay caused by the reservation process can degrade performance.In addition to the resource shar...

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Performance analysis of multiple access protocols for CDMA cellular and personal communications services

Cited by 14 publications

References 5 publications

A Medium Access Control Protocol for Voice/Data Integrated Wireless CDMA Systems

A Medium Access Control Protocol for Voice/Data Integrated Wireless CDMA Systems

A slotted CDMA protocol with BER scheduling for wireless multimedia networks

Medium access control protocols for multimedia traffic in wireless networks

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