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
More filters
01 Nov 2011
TL;DR: Novel scheduling algorithms are presented and compared to the Max C/I Downlink scheduler for LTE, which is characterized by high data rates at cell level, but poor fairness; the newly developed algorithms allow fair distribution of available resources.
Abstract: Long Term Evolution (LTE) is the new standard specified by 3GPP on the way towards the fourth generation mobile network. The LTE introduces enhanced data link mechanisms to support successful implementation of new data services across the network. The incorporated scheduling mechanisms can significantly contribute to this goal. In this paper novel scheduling algorithms are presented and compared to the Max C/I Downlink scheduler for LTE, which is characterized by high data rates at cell level, but poor fairness. The newly developed algorithms allow fair distribution of available resources. Simulation results presented in the paper show that the implementation of these newly developed algorithms enables improvement of the overall system capacity and user level performances.
51 citations
Cites background or methods from "3G Evolution : HSPA and LTE for Mob..."
...The performances of the system with implemented new algorithms are evaluated and compared to the performances of the system using the Maximum Carrier-to-Interference ratio (Max C/I) scheduler [1]....
[...]
...Namely, below 10dB some user still return CQI value “1” or very small values [1,2,3]....
[...]
...Although resulting in the highest system capacity, this situation is often not acceptable from a quality-of-service point-ofview [1]....
[...]
...It contains less network nodes, thus reducing protocol processing overhead and leading to reduced latency [1][2][3][4]....
[...]
...where i R is the instantaneous data rate for user i [1]....
[...]
25 Nov 2013
TL;DR: A resource allocation scheme involving several Device-to-Device (D2D) multicast groups underlaying OFDMA-based systems is proposed and results show that the proposed scheme improves sum-throughput significantly as well as fairness.
Abstract: A resource allocation scheme involving several Device-to-Device (D2D) multicast groups underlaying OFDMA-based systems is proposed in this paper. In order to guarantee Quality of service (QoS) of cellular users (CeUEs), we define the signal-to-interference-pulse noise ratio (SINR) threshold value for CeUEs. Meanwhile, the minimum throughput of a single D2D multicast group is predetermined to maintain fairness of each D2D multicast group. Since the subcarrier assignment and power allocation are a joint optimization problem with complex calculation, the proposed scheme is divided into two steps. First, subcarriers are allocated under the premise of ensuring the minimum throughput of the D2D multicast groups and the QoS of CeUEs. Then by applying an approximation form of Shannon capacity, the power allocation problem can be solved by convex optimization. Simulation results show that the proposed scheme improves sum-throughput significantly as well as fairness. Besides, the sum-throughput increases with the increasing number of D2D multicast groups.
50 citations
Cites methods from "3G Evolution : HSPA and LTE for Mob..."
...With the using of application level coding, the users are able to reconstruct the information only if they receive sufficiently many coded packets [7]....
[...]
11 Oct 2009
TL;DR: This survey summarizes the main findings on secure WMSNs proposed in the literature and forecasts future perspectives of such a technology.
Abstract: Wireless Multimedia Sensor Networks (WMSNs) are used in many application domains, such as surveillance systems, telemedicine and so on. In order to ensure a broad deployment of such innovative services, strict requirements on security, privacy, and distributed processing of multimedia contents should be satisfied, taking also into account the limited technological resources (in term of energy, computation, bandwidth, and storage) of sensor nodes. Thus, with respect to classic Wireless Sensor Networks, the achievement of these goals is more challenging due to the presence of multimedia data, which usually requires complex compression and aggregation algorithms. In order to provide a unifying synthesis on the last achievements, this survey summarizes the main findings on secure WMSNs proposed in the literature and forecasts future perspectives of such a technology.
50 citations
14 Jun 2009
TL;DR: This paper describes a concept of distributed cooperation, where BSs communicate directly via a BS-BS interface without central control, which shows the capability of BS cooperation applied to 3GPP LTE in terms of cell and user throughput but it also shows the trade-off interms of increased backhaul requirement due to BS- BS communication.
Abstract: Cellular systems in general suffer from co-channel interference, when simultaneous transmissions in other cells use the same physical resources. In order to mitigate such co-channel interference cooperating Base Stations (BSs) can perform joint multi-antenna signal processing across cell borders.
This paper describes a concept of distributed cooperation, where BSs communicate directly via a BS-BS interface without central control. A serving BS can serve its terminals on its own or it can request cooperation from one or more supporting BSs. By collecting IQ samples from the supporting BSs' antenna elements, the serving BS can virtually increase its number of receive antennas. Exchanging additional parameters allows applying advanced receiver algorithms, e.g., interference rejection or cancelation. Performance evaluations by means of simulation show the capability of BS cooperation applied to 3GPP LTE in terms of cell and user throughput but it also shows the trade-off in terms of increased backhaul requirement due to BS-BS communication.
50 citations
Cites background from "3G Evolution : HSPA and LTE for Mob..."
...3GPP’s core network (named System Architecture Evolution (SAE)) and the radio access (named Long-Term Evolution (LTE)) are evolving in parallel [5]–[7]....
[...]
TL;DR: This paper accounts for the information rate, memory, power efficiency, bit error rate (BER) performance and spectral occupancy of CPM-SC-FDMA, a novel multiple-access modulation scheme which combines key characteristics of single carrier frequency division multiple access with continuous phase modulation in order to generate a power efficient waveform.
Abstract: This paper presents a novel multiple-access modulation scheme which combines key characteristics of single carrier frequency division multiple access (SC-FDMA) with continuous phase modulation (CPM) in order to generate a power efficient waveform. CPM-SC-FDMA is developed based upon the observation that the samples from a CPM waveform may be treated as "data symbols" taken from a constant-envelope encoder. As with any encoder output, these samples may be precoded using the Discrete Fourier Transform and transmitted using SC-FDMA. Having originated from a constant envelope CPM waveform, CPM-SC-FDMA can potentially retain much of the power efficiency of CPM-thus resulting in a lower peak-to-average power ratio (PAPR) than conventional SC-FDMA. In this paper, we account for the information rate, memory, power efficiency, bit error rate (BER) performance and spectral occupancy of CPM-SC-FDMA. In addition, we investigate the impact of amplifier nonlinearity on BER performance as the number of users increases. Finally, we provide a detailed numerical comparison with a commensurate convolutionally coded QPSK-SC-FDMA scheme (CC-QPSK-SC-FDMA). We show a CPM-SC-FDMA scheme that provides an overall gain of up to 4 dB relative to the CC-QPSK-SC-FDMA scheme over a frequency-selective channel.
50 citations
Cites methods from "3G Evolution : HSPA and LTE for Mob..."
...The LFDMA variant has been adopted for the uplink multiple access scheme for the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE), or Evolved UTRA [14], [15]....
[...]