A slotted CDMA protocol with BER scheduling for wireless multimedia networks

Akyildiz, Ian F.; Levine, David A.; Joe, Inwhee

doi:10.1109/90.769764

Cited by 163 publications

(150 citation statements)

References 28 publications

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“…To overcome this shortcoming, different power levels should be assigned in each slot based on the BER requirements of the allocated MSs. Specifically, minimum power levels for all MSs to transmit in a slot can be determined based on the equalities in (1). Under this power allocation strategy, resource underutilization in each slot is avoided and better system performance is achieved [71], at the cost of more complex power allocation.…”

Section: B Time Scheduling With Delay Boundmentioning

confidence: 99%

“…MS is characterized by requirement , bit transmission rate , and channel gain . The transmit power vector, , can be obtained by solving the following linear inequalities 1 (1) with constraints (2) where is total uplink bandwidth used by all the MSs, and are intercell interference and background noise power, respectively, and is the transmit power limit of MS . After some algebra, the following constraint can ensure there exists a feasible transmit power vector [3], [62]: (3) 1 For uplink with interference cancellation techniques, as the perceived intracell interference may be alleviated or eliminated, the inequalities (1) should be changed accordingly.…”

Section: Packet Scheduling With Power Allocationmentioning

confidence: 99%

“…To provide a generic scheduling model to delay-bounded voice/video/data traffic, a wireless multimedia access control protocol with BER scheduling (termed WISPER) [1] has the ability to support a number of multimedia traffic classes with different BER requirements. WISPER is based on a slotted CDMA system, where an uplink frame consists of a request slot for MSs to issue transmission requests and a few packet slots, and a downlink frame includes a control slot for the BS to send transmission permissions and several packet slots.…”

Section: B Time Scheduling With Delay Boundmentioning

confidence: 99%

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Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Jiang

Zhuang

Shen

et al. 2006

IEEE J. Select. Areas Commun.

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Abstract-One of the major challenges in supporting multimedia services over Internet protocol (IP)-based code-division multiple-access (CDMA) wireless networks is the quality-of-service (QoS) provisioning with efficient resource utilization. Compared with the circuit-switched voice service in the second-generation CDMA systems (i.e., IS-95), heterogeneous multimedia applications in future IP-based CDMA networks require more complex QoS provisioning and more sophisticated management of the scarce radio resources. This paper provides an overview of the CDMA-related QoS provisioning techniques in the avenues of packet scheduling, power allocation, and network coordination, summarizes state-of-the-art research results, and identifies further research issues.Index Terms-Code-division multiple-access (CDMA), intercell coordination, multimedia services, packet scheduling, power allocation, quality-of-service (QoS), soft handoff.

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Section: B Time Scheduling With Delay Boundmentioning

confidence: 99%

Section: Packet Scheduling With Power Allocationmentioning

confidence: 99%

Section: B Time Scheduling With Delay Boundmentioning

confidence: 99%

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Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Jiang

Zhuang

Shen

et al. 2006

IEEE J. Select. Areas Commun.

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“…Scheduling -The WISPER protocol was developed to take advantage of the power control characteristics of the IS-95 standard [34]. This protocol was designed so that the BER of the transmission channel is maintained below a given specification.…”

Section: Wlreiess Multimedia Access Control Protoco/ With Bit Error Ratementioning

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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“…2, which can support different traffic types such as CBR, VBR and ABR. In the DS-CDMA system, the maximum number of channels can be simultaneously used to transmit data for CBR, VBR and ABR depending on the different tolerable bit error rate (BER, P e ) [13], which is assumed that BPSK modulation scheme is used in the additive white Gaussian noise (AWGN) channel as shown in Eq. (1) [14],…”

Section: Description Of the Proposed Cltsrmentioning

confidence: 99%

A Cross Layer Time Slot Reservation Protocol for Wireless Networks

Lee¹,

Wong²,

Chien³

Embedded and Ubiquitous Computing

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Abstract. The function of medium access control (MAC) protocol and the capacity of physical layer sufficiently affect the system performance in the wireless networks. In this research, we propose a MAC protocol based on direct sequence code division multiple access (DS-CDMA) for the wireless networks to guarantee quality-of-service (QoS) which depend on physical layer information, named the cross layer time slot reservation (CLTSR) protocol. A channel is divided into control and data channels to transmit control and data packets in the corresponding control and data frames, respectively. The data frame is further subdivided into several time slots; each time slot can transmit different traffic types such as constant bit rate (CBR), variable bit rate (VBR), and available bit rate (ABR). Each station maintains the available spreading code (ASC) table to understand which time slots and spreading codes have been reserved. CLTSR will allocate time slots and the spreading code for the data frame by using the fixed time slot allocation (FTSA) or the mixed time slot allocation (MTSA). The QoS can be guaranteed by providing the reservation of time slots and the spreading code. A Markov model is applied to analyze the CLTSR DS-CDMA system; the analytical and simulation results show that the proposed CLTSR performs has been improved.

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A slotted CDMA protocol with BER scheduling for wireless multimedia networks

Cited by 163 publications

References 28 publications

Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Quality-of-service provisioning and efficient resource utilization in CDMA cellular communications

Medium access control protocols for multimedia traffic in wireless networks

A Cross Layer Time Slot Reservation Protocol for Wireless Networks

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