Shannon-theoretic approach to a Gaussian cellular multiple-access channel

Wyner, Aaron D.

doi:10.1109/18.340450

Cited by 660 publications

(692 citation statements)

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“…The concept of joint processing of signals to evaluate sum rate was introduced in Wyner's Gaussian Cellular Multiple Access Channel (GCMAC) model [1]. Letzepis extended classical work of Wyner, to produce a log det formulation for capacity of jointly processed cellular networks with free space path loss.…”

Section: Simulation Based Sum Rate For Cc-cmacmentioning

confidence: 99%

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Frequency planning for clustered jointly processed cellular multiple access channel

2013

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Due to limited resources, it is hard to guarantee minimum service levels to all users in conventional cellular systems. Although global cooperation of Access Points (APs) is considered promising, practical means of enhancing efficiency of cellular systems is by considering distributed or clustered jointly processed APs. Authors present a novel 'QoS balancing scheme' to maximize sum rate as well as achieve cell based fairness for clustered jointly processed cellular Multiple Access Channel (CC-CMAC). Closed form cell level quality of service (QoS) balancing function is derived. Maximization of this function is proved as an NP Hard problem. Hence,using power-frequency granularity, a modified genetic algorithm (GA) is proposed. For ISD < 500m, results show that with no fairness considered, the upper bound of the capacity region is achievable. Applying hard fairness restraints on users transmitting in moderately dense AP system, 20% reduction in sum rate contribution increases fairness by upto 10%. The flexible QoS can be applied onto a GA based centralized dynamic frequency planner architecture.

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Section: Simulation Based Sum Rate For Cc-cmacmentioning

confidence: 99%

“…Global AP cooperation which has been studied in classical Wyner model [1], extended with fading [2] and distance dependent pathloss [3], is considered too complex to implement. Recently, localized joint processing of APs has been proposed in the framework of isolated groups [4], local message passing [5,6], and limited backhaul [7].…”

Section: Introductionmentioning

confidence: 99%

Frequency planning for clustered jointly processed cellular multiple access channel

2013

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“…The key idea in [21] is to treat the one-dimensional cellular model as an ISI channel. In fact, this idea goes back to [59]. The state for cell i is s i = (x i−1 , x i , x i+1 ) and we assume the symbols from different mobiles are independent, taking values in some finite alphabet (which can be different for the different users).…”

Section: 31mentioning

confidence: 99%

Turbo base stations

Aktas

Hanly

et al. 2011

Cooperative Cellular Wireless Networks

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IntroductionCellular communication systems provide wireless coverage to mobile users across potentially large geographical areas, where base stations (BSs) provide service to users as interfaces to the public telephone network. Cellular communication is based on the principle of dividing a large geographical area into cells which are serviced by separate BSs. Rather than covering a large area by using a single, high-powered BS, cellular systems employ many lower-powered BSs each of which covers a small area. This allows for the reuse of the frequency bands in cells which are not too close to each other, increasing mobile user capacity with a limited spectrum allocation.Traditional narrowband cellular systems require the cochannel interference level to be low. Careful design of frequency reuse among cells is then crucial to maintain cochannel interference at the required low level. The price of low interference, however, is a low frequency reuse factor: only a small portion of the system frequency band can be used in each cell. More recent wideband approaches allow full frequency reuse in each cell, but the cost of that is increased intercell interference. In both approaches, the capacity of a cell in a cellular network, with six surrounding cells, is much less than that of a single cell operating in an intercell interference-free environment. In this chapter, we survey an approach that allows the cell with neighbors to achieve essentially the same capacity as the interference-free cell.In a conventional cellular system, each mobile user is serviced by a single BS, except for the soft-handoff case -a temporary mode of operation where the mobile is moving between cells and is serviced by two base stations. A contrasting idea is to require each mobile station to be serviced by all BSs that are within its reception range. In this approach all the BSs in the cellular network are components of a single transceiver with distributed antennas, an approach known as "network multiple-input multiple-output (MIMO)."Cooperative Cellular Wireless Networks, eds.

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“…More specifically, we consider the Wyner soft-handoff model [10], where each transmitterreceiver pair interferes only one of its neighboring receivers and gets interfered by only one of its other neighboring transmitters, as shown in Fig. 2.…”

Section: B Approximate Sum Capacity For Wyner Modelmentioning

confidence: 99%

Approximate bounds for limited backhaul uplink multicell processing with single-user compression

Zhou

2013

2013 13th Canadian Workshop on Information Theory

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Abstract-This paper studies single-user compression for the uplink multi-cell processing (MCP) model where multiple basestations are connected to a central processor via noiseless backhaul links with a sum capacity constraint. The proposed scheme is based on the virtual multiple-access channel (V-MAC) architecture, where the base-stations quantize the received signals and send the quantized bits to the central processor, and at the decoder side the central processor first recovers the quantized signals then decodes the user messages in a successive manner. This paper focuses on the use of single-user compression in the V-MAC architecture, which is significantly simpler to implement than Wyner-Ziv compression. The main result of this paper is that single-user compression can achieve the sum capacity of the MCP model to within a constant gap under two specific scenarios. First, we define a diagonally dominant channel criterion and show the constant-gap result for the case when the covariance matrix of the received signals across the base-stations is κ-strictly diagonally dominant for some constant κ > 1. Second, we show that the constant-gap result holds for a special class of Wyner channel models in the weak interference regime.

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Shannon-theoretic approach to a Gaussian cellular multiple-access channel

Cited by 660 publications

References 6 publications

Frequency planning for clustered jointly processed cellular multiple access channel

Frequency planning for clustered jointly processed cellular multiple access channel

Turbo base stations

Approximate bounds for limited backhaul uplink multicell processing with single-user compression

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