Two key problems need to be solved in order to realize soft handoff in wireless IP (Internet Protocol) networks: 1) Data distribution: multiple streams of the same IP traffic have to be distributed via multiple wireless base stations to the same mobile station, 2) Data content synchronization: pieces of data arriving at the mobile station at the same time from different base stations should be ...

Relaying is one of the proposed technologies for LTE-Advanced networks. In order to enable a flexible and reliable relaying support, the currently adopted architectural structure of LTE networks has to be modified. In this paper, we extend the LTE architecture to enable dynamic relaying, while maintaining backward compatibility with LTE Release 8 user equipments, and without limiting the flexib...

Clayton Shepard†‡, Rahman Doost-Mohammady†, Jian Ding†, Ryan E. Guerra†‡, and Lin Zhong† †Department of Electrical and Computer Engineering, Rice University, Houston, TX ‡Skylark Wireless LLC, Houston, TX [email protected], [email protected], [email protected], [email protected], [email protected] . Abstract—We built and deployed a multi-cell network testbed of massive-MIMO base stations across R...

A fundamental question in a wireless cellular system is how to allocate base stations, radio transceivers, and channels in an efficient manner. This question becomes difficult when operators must react to burgeoning demand. This paper explores a pure ad hoc approach where call requests are given the first available channel that meets signal quality requirements, radio transceivers are added imm...

We propose a space time coded cooperative diversity protocol that achieves improved quality of service for the mobile users in cellular systems. The protocol, called cooperative frequency reuse, exploits the cellular frequency reuse concept to create spatial diversity among neighboring base stations. After transmitting their individual signals in the channel reuse protected frequency subchannel...

This white paper is concerned with connectivity between functional units within conventional and evolved wireless base stations. In-phase/quadrature (I/Q) radio sample distribution between the baseband and radio modules is addressed, as well as internal transport of traff ic and control data within the base station. The white paper is organized as follows: • The Introduction section provides a ...

A linear mesh network is considered in which a single user per cell communicates to a local base station via a dedicated relay (two-hop communication). Exploiting the possibly relevant inter-cell channel gains, rate splitting with successive cancellation in both hops is investigated as a promising solution to improve the rate of basic single-rate communications. Then, an alternative solution is...

This paper presents a generic radio access network cost assessment and optimisation methodology, allowing a performance-vs.-cost assessment of different deployment options considered in beyond-3G networks as, e.g., the WINNER system. Cost assessments are based on an identification and classification of relevant cost components of advanced radio access network deployments, including radio access...

In order to prevent inter-slot interference and enhance the system capacity in Wideband Code Division Multiple Access (WCDMA) time division duplex (TDD) mode of communication, synchronization between the base stations are necessary. Although the most straightforward way of achieving synchronization is by using the global positioning system (GPS), it is very costly. An alternative solution propo...

ODMA (Opportunity Driven Multiple Access) is an optional extension of the third generation mobile communication standard called UMTS (Universal Mobile Telecommunication System). It de-nes a special ad-hoc network, where each mobile node that wants to communicate has to connect to the base station with the assistance of the forthcoming mobile nodes. So in this ad-hoc network the destination is x...