Convergence of cellular and broadcast networks from a multi-radio perspective

Abstract

The demand of both the new telecom industry and digital broadcasters for cost-efficient provisioning of mobile multimedia services faces the reality of scarce radio resources. Various digital mobile and broadcast radio technologies have been developed and specifically been optimized. However, existing and emerging multimedia services exhibit challenging requirements in terms of asymmetry, interactivity, real time, and mulicast communication. This article describes an evolution of an IP-based infrastructure from today's networks toward a future multi-radio infrastructure, taking into account the implications on the end-user terminal. This multi-radio infrastructure enables the cooperation of existing radio networks to combine their spectrum-efficient capabilities, whereby high-quality mobile multimedia services shall be provided. Furthermore, the need for dynamic allocation of spectrum to radio services is motivated. The basic functionality and architecture of a multi-radio system are outlined, with a special emphasis on cooperation between different radio systems. Also, an evolution path for the convergence of broadcast and new telecom is described, starting from today's systems and leading to a fully coordinated system.

Spectrum Usage Models for the Analysis, Design and Simulation of Cognitive Radio Networks

“…This allocation, however, varies at a much faster scale than the current policy (e.g., traffic demands usually exhibit a periodic daily pattern). This approach received great attention within the research community [26][27][28][29][30][31][32].…”

“…After initializing the counters and variables employed in the measurement process (lines 3-7), the script then waits until the time for beginning the measurement session is reached (lines [8][9][10]. When the start time is reached, the measurement process begins and it is performed repeatedly until the specified stop time is reached (lines [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Every cycle consists in the realization of one sweep and its storage.…”

“…Since one sweep is completed at this time, the trace counter is increased (line 21) and compared to the number of traces to be saved in each generated file (line 22). In case that a new file needs to be created, the file counter is updated (line 23) and the matrices containing the measured power values (line 24) and their corresponding time stamps (line 25) are then saved, after which the counter and the matrices are reset (lines [26][27][28]. When one cycle (lines 11-30) is finished, another one is started immediately, and the process is repeated cyclically until the stop time is reached.…”

A Survey of Dynamic Spectrum Access: Signal Processing and Networking Perspectives

“…Literature on dynamic spectrum allocation is extensive [5,[19][20][21][22][23][24][25][26][27]. The European DRiVE project [5] focuses on dynamic spectrum allocation in heterogeneous networks by assuming a (logical) common coordination channel.…”

A multi-layered OFDM system with parallel transmission for multicell cooperative cellular networks

“…Due to the significant users' requirements for mixed services, the concept of cellular hybrid [1][2][3][4] is becoming an intriguing requirement to simultaneously support different services, e.g., the two main types: point-to-point unicast (conventional cellular communications) and point-tomultipoint broadcast. However, today's design methodology of cellular networks is characterized by uncoordinated approaches in several aspects.…”