Coordinated Multipoint Trials in the Downlink

Jungnickel, Volker; Thiele, Lars; Wirth, Τ.; Haustein, Thomas; Schiffermuller, S.; Forck, A.; Wahls, Sander; Jaeckel, Stephan; Schubert, Stefan; Gabler, H.; Juchems, Christoph; Luhn, F.; Zavrtak, R.; Droste, Heinz; Kadel, G.; Kreher, W.; Mueller, J.; Stoermer, W.; Wannemacher, G.

doi:10.1109/glocomw.2009.5360722

Cited by 81 publications

(38 citation statements)

References 19 publications

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“…Ergodicity describes that any sample that belongs to a process is representative of the entire process, statistically-wise [11]. It is noticed that when the SNR decreases, channel capacity increases.…”

Section: Resultsmentioning

confidence: 99%

An analysis of the video capabilities of multiple antenna LTE networks

et al. 2017

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LTE technology has been designed to serve high data traffic and to withstand occasional traffic bursts caused by various events that arise when live video streams are watched. LTE will have to manage its resources judiciously since video traffic is not constant, and at the same time it will have to seek to offer highest quality experience. This paper demonstrates the benefits of using MIMO technique with 4 transmitters instead 2 when requesting live video streams. It also displays mobility cases each with a different subscriber moving speed, and with different gains, respectively.

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Section: Resultsmentioning

confidence: 99%

An analysis of the video capabilities of multiple antenna LTE networks

et al. 2017

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“…The semi-distributed architecture, introduced in [29] and [30], is depicted in Figure 3. Under this architecture, each user feeds back the CSI vector to its serving TN.…”

Section: Semi-distributed Comp Architecturementioning

confidence: 99%

“…e Note that shadowing can be introduced to our model by adding a shadowing factor to each of the (d) values in Equation 29.…”

Section: Endnotesmentioning

confidence: 99%

On the impact of control channel reliability on coordinated multi-point transmission

Mayer

Papadogiannis

et al. 2014

J Wireless Com Network

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In the heterogeneous networks (HetNets), co-channel interference is a serious problem. Coordinated multi-point (CoMP) transmission has emerged as a powerful technique to mitigate co-channel interference. However, all CoMP techniques rely on information exchange through reliable control channels, which are unlikely to be available in HetNets. In this paper, we study the effect of unreliable control channels, consisting of the access links and backhaul links, on the performance of CoMP. A control channel model is introduced by assigning link failure probability (LFP) to backhaul and access links for the cooperative clusters. Three CoMP architectures, namely the centralized, semi-distributed, and fully distributed are analyzed. We investigate the probability of deficient control channels reducing quality of service and impeding transmission. General closed form expressions are derived for the probability of a cooperative transmission node staying silent in a resource slot due to unreliable control links. By evaluating the average sum rate of users within a CoMP cluster, we show that the performance gains offered by CoMP quickly diminish, as the unreliability of the control links grows.

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“…3 turned out as an essential enabler for CoMP trials in the field where we use distributed MT and BS locations. In our previous trials [22], the CSI feedback from both MTs has been decoded at each BS. Note that channel gains and delays between the distributed BSs and MTs in the field can vary substantially.…”

Section: B Csi and Data Exchange Networkmentioning

confidence: 99%

“…Implementation of enabling features such as clock synchronization, synchronous data exchange, cell specific pilots, CSI feedback, cooperative precoding, precoded pilots and initial laboratory trials are reported in [22]. Here we describe further system extensions enabling over-the-air experiments with physically separated BSs and distributed mobile terminals (MTs) and report initial field trial results.…”

Section: Introductionmentioning

confidence: 99%

Field trials using coordinated multi-point transmission in the downlink

Jungnickel

Forck

Jaeckel

et al. 2010

2010 IEEE 21st International Symposium on Personal, Indoor and Mobile Radio Communications Workshops

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Abstract-We report on field trials using CoMP transmission in the downlink of a mobile radio network. Two new features enable over-the-air CoMP transmission from physically separated base stations and terminals. These are distributed synchronization and a fast virtual local area network. Using VLAN tags, terminals feed back the multi-cell channel state information to their serving bases where it is multiplexed with shared data. Both are multicast to other cooperative base stations over the backhaul. In our trials, two terminals are served in two overlapping cells and placed in specific indoor, outdoor-to-indoor and outdoor scenarios. We have realized both intra-site as well as inter-site CoMP. While outage is indeed a big problem at the cell edge with full frequency reuse, with CoMP it is not observed anymore. Average throughput gains by factors 4 to 22 are observed when using CoMP compared to interference-limited transmission while between 27 and 78% of the isolated cell throughput is measured in both cells simultaneously.

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Coordinated Multipoint Trials in the Downlink

Cited by 81 publications

References 19 publications

An analysis of the video capabilities of multiple antenna LTE networks

An analysis of the video capabilities of multiple antenna LTE networks

On the impact of control channel reliability on coordinated multi-point transmission

Field trials using coordinated multi-point transmission in the downlink

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