Book•
3G Evolution : HSPA and LTE for Mobile Broadband
31 Jul 2007-
TL;DR: In this paper, the authors present a very up-to-date and practical book, written by engineers working closely in 3GPP, gives insight into the newest technologies and standards adopted by threeGPP with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE.
Abstract: This very up-to-date and practical book, written by engineers working closely in 3GPP, gives insight into the newest technologies and standards adopted by 3GPP, with detailed explanations of the specific solutions chosen and their implementation in HSPA and LTE. The key technologies presented include multi-carrier transmission, advanced single-carrier transmission, advanced receivers, OFDM, MIMO and adaptive antenna solutions, advanced radio resource management and protocols, and different radio network architectures. Their role and use in the context of mobile broadband access in general is explained. Both a high-level overview and more detailed step-by-step explanations of HSPA and LTE implementation are given. An overview of other related systems such as TD SCDMA, CDMA2000, and WIMAX is also provided.This is a 'must-have' resource for engineers and other professionals working with cellular or wireless broadband technologies who need to know how to utilize the new technology to stay ahead of the competition.The authors of the book all work at Ericsson Research and are deeply involved in 3G development and standardisation since the early days of 3G research. They are leading experts in the field and are today still actively contributing to the standardisation of both HSPA and LTE within 3GPP. * Gives the first explanation of the radio access technologies and key international standards for moving to the next stage of 3G evolution: fully operational mobile broadband* Describes the new technologies selected by the 3GPP to realise High Speed Packet Access (HSPA) and Long Term Evolution (LTE) for mobile broadband * Gives both higher-level overviews and detailed explanations of HSPA and LTE as specified by 3GPP
Citations
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TL;DR: This work considers frequency domain equalization (FEQ) using the proposed channel estimate at both the transmitter and receiver and compares the resulting bit error rate (BER) performance curves for both approaches and various channel estimation techniques.
Abstract: A new channel estimation method for discrete multitone (DMT) communication system based on sparse Bayesian learning relevance vector machine (RVM) method is presented. The Bayesian frame work is used to obtain sparse solutions for regression tasks with linear models. By exploiting a probabilistic Bayesian learning framework, sparse Bayesian learning provides accurate models for estimation and consequently equalization. We consider frequency domain equalization (FEQ) using the proposed channel estimate at both the transmitter (preequalization) and receiver (postequalization) and compare the resulting bit error rate (BER) performance curves for both approaches and various channel estimation techniques. Simulation results show that the proposed RVM-based method is superior to the traditional least squares technique.
6 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...One of the research goals during the last decades was to provide broadband communication capabilities to and from the customer premises [1, 2]....
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DOI•
19 Nov 2015TL;DR: In this article, the authors discuss about LTE FDD network planning for 1800 MHz using software Atoll, where the propagation models that suitable to support this planning is COST-231 Hata model.
Abstract: Abstrak LTE merupakan teknologi evolusi dari GSM yang dikembangkan oleh 3GPP dan disebut sebagai salah satu teknologi pra-generasi keempat (4G). Implementasi LTE di Indonesia sendiri masih belum menyuluruh dan baru diterapkan di beberapa kota besar saja, namun frekuensi untuk menggelar LTE sudah disediakan, salah satunya pada frekuensi 1800 MHz. Sebelum menggelar teknologi LTE perlu dilakukan perencanaan jaringan untuk mengetahui jumlah eNodeB yang dibutuhkan. Pada Tugas Akhir ini dilakukan perencanaan jaringan LTE FDD 1800 MHz menggunakan perangkat lunak Atoll. Perencanaan yang dilakukan menggunakan metode perencanaan cakupan dengan studi kasus di Kota Semarang. Untuk mendukung hal tersebut ditentukan model propagasi yang sesuai untuk perencanaan ini, yaitu model COST-231 Hata. Hasil dari simulasi menunjukkan bahwa jumlah eNodeB yang dibutuhkan dalam perencanaan adalah sebanyak 152 site dan 453 sel agar area Kota Semarang tercakupi oleh RS dan SINR minimal sekurang-kurangnya 95%. Hasil lain didapatkan bahwa jumlah pelanggan yang dapat mengakses jaringan hingga ke daerah indoor didapatkan sebanyak 98,7% untuk bandwidth 5 MHz, 97,1% untuk 10 MHz, 95,9% untuk 15 MHz, dan 94,8% untuk 20 MHz. Pada bandwidth 20 MHz kapasitas sel dan throughput sel yang dihasilkan adalah yang paling besar dengan beban sel sebesar 50,53% untuk downlink dan 18,84% untuk uplink , dan throughput sel yang dihasilkan sebesar 34.633 kbps untuk downlink dan 9.591 kbps untuk uplink . Kata kunci: LTE, perencanaan cakupan, Atoll Abstract LTE is technology evolution of GSM that developed by 3GPP as one the 4G technology. LTE technology in Indonesia is not implemented entirely and just implemented in some big cities, however the frequencies for implementing this technology is available, one of them is 1800 MHz. It is necessary for network planning before deploying LTE to know the number of eNodeB. This final project discusses about LTE FDD network planning for 1800 MHz using software Atoll. This planning uses coverage planning method with case study in Semarang City. The propagation models that suitable to support this planning is COST-231 Hata model. The result of this simulation shows that the number of eNodeB that required in this planning is 152 site and 453 cell to result minimum RS and SINR coverage at least 95% of Semarang City area. The other result is that the number of user that connected to the network including indoor user is 98,7% for bandwidth 5 MHz, 97,1% for 10 MHz, 95,9% for 15 MHz, and 94,8% for 20 MHz. Bandwidth 20 MHz has the largest capacity cell and highest throughput cell with 50,53% cell load for downlink and 18,84% for uplink, and the throughput cell is 34.633 kbps for downlink dan 9.591 kbps for uplink. Keywords: LTE, coverage planning, Atoll
6 citations
09 Jun 2013
TL;DR: A power control scheme that adapts the transmit power of each pico independently in some subframes based on the requirement of CRE UEs is proposed and results show that the proposed scheme achieves better performance for both macro UEs and picoCRE UEs compared to when macro transmit power is reduced.
Abstract: In this work, a heterogeneous network with low power pico nodes overlaid in macro cell coverage area is considered. Biased association is used at picos to achieve load balancing, which results in cell range expansion (CRE). The user equipments (UEs) in CRE region will associate to a weak pico node and experience severe interference from macro eNodeB. Blanking subframes at macro, coupled with scheduling pico CRE users in these protected subframes has been introduced in the LTE-Advanced standard to protect the CRE UEs from macro interference. This considerably improves the performance of CRE UEs at the cost of macro resources and additional macro-pico signalling overhead. It is also proposed to reduce the transmit power of macro instead of blanking in order to avoid the loss of resources. In this paper, a power control scheme that adapts the transmit power of each pico independently in some subframes based on the requirement of CRE UEs is proposed. The system simulation results show that the proposed scheme achieves better performance for both macro UEs and pico CRE UEs compared to when macro transmit power is reduced, even while utilizing all the resources at macro and without any additional signalling between macro and pico nodes.
6 citations
Cites methods from "3G Evolution : HSPA and LTE for Mob..."
...PeNB will request MeNB over X2 interface to configure ABS, and the MeNB will respond by indicating the location of these ABS configured using an ABS bitmap [8], [9]....
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Patent•
25 Feb 2015TL;DR: In this paper, the authors describe a CoMP protocol in which the upload request message is sent from the wireless device to the cooperating nodes in the CoMP set for uploading the data file to the network node, and based on an upload grant from at least one cooperating node, a plurality of piece messages are sent to the non-coordinating nodes for transmission to the node, each piece message containing a particular piece of the file.
Abstract: Various methods, devices and nodes in a wireless system are disclosed for efficiently transferring files (both uploads and downloads) between a wireless device and a network node in a Coordinated Multipoint (CoMP) environment. According to a broad aspect, an upload request message is sent from the wireless device to the cooperating nodes in the CoMP set for uploading the data file to the network node, and based on an upload grant from at least one cooperating node, a plurality of piece messages are sent to the cooperating nodes for transmission to the network node, each piece message containing a particular piece of the data file. In yet another broad aspect, both a coordinating node and non-coordinating nodes in the CoMP set are configured to receive piece messages. Non-coordinating nodes that receive piece messages send acknowledgement messages to the coordinating node indicating which pieces have been received. If at least one piece has not been received at the coordinating node but received at a non-coordinating node, the coordinating node instructs the non-coordinating node to forward the at least one piece received to the network node.
6 citations
28 Jun 2010
TL;DR: Simulations results show that the proposed CAC scheme combined with proposed Packet Scheduling policy greatly improves performance of non-GBR service, while also maintaining quite well the Quality of Service (QoS) of delay sensitive traffic (GBR) and ends up with reduction in Packet Drop Ratio (PDR) for system.
Abstract: In this paper, we evaluate a two-stage call admission control (CAC) policy for Long Term Evolution (LTE) Systems working along with packet scheduler (PS). The proposed two-stage admission scheme uses the quality the received signal as an indicator to estimate the amount of resources for each call in order to improve the performance of the overall network. Unlikely with other CAC approaches we use a SINR-based estimator to clarified the connection quality, and thereafter quantize the user demand in term of physical resources. However, for scheduling, we use an algorithm where highest priority is assigned for guaranteed bit rate (GBR) proportional to their packet delays. Simulations results show that the proposed CAC scheme combined with proposed Packet Scheduling policy greatly improves performance of non-GBR service, while also maintaining quite well the Quality of Service (QoS) of delay sensitive traffic (GBR) and ends up with reduction in Packet Drop Ratio (PDR) for system.
6 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...In addition, it will provide seamless access to heterogeneous traffics such as voice, video streaming and data traffics, while guaranteeing end-to-end Quality of Service (QoS) requirements for all [4]....
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