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This paper presents an autonomous, self-organizing and decentralized configuration and management system for a group of base stations in wireless networks. Compared to existing systems, where a central node computes and disseminates management information, the system’s decentralized operation improves reliability by eliminating central points of failure and can decrease convergence times for la...

Emerging high-speed metropolitan Ethernets create new opportunities to save costs when converging data and telephony services. However, connecting GSM and UMTS base stations over metropolitan Ethernets require these networks to meet stringent QoS requirements in the presence of bursty data traffic. To investigate this problem, we have probed ETH’s campus network, which spans the metropolitan ar...

We propose a decentralized downlink scheduling protocol for wireless cellular networks that allows each base station to control its transmission power. On the beginning of each scheduling period, neighbor base stations exchange their local system states, i.e., channel, traffic and position statistics of their local mobile users. But on each slot of the current scheduling period, the base statio...

In this paper we review location models, specifically covering location models, which are applicable to modeling the location of base stations for cellular phone users. The definition of cover is revisited, suggesting three new definitions of cover: two gradual cover models, and one sum cover model. A new objective for covering models, the variable radius model, is proposed. The probability tha...

Multi-hop ad-hoc networks consist of nodes which cooperate by forwarding packets for each other to allow communication beyond the power range of each node. In pure ad-hoc networks, no additional infrastructure is required to allow the nodes to communicate. Multi-hop hybrid networks are a combination of ad-hoc and cellular networks. As in ad-hoc networks, the nodes forward packets on behalf of o...

This paper proposes a mobile cache model to facilitate the cooperative proxy caching in wireless base stations. This mobile cache model uses a network cache line to record the caching state information about a web document for effective data search and cache space management. Based on the proposed mobile cache model, a P2P cooperative proxy caching scheme is proposed to use a self-configured an...

We consider an orthogonal frequency division multiple access (OFDMA)-based multicast system where multiple base stations transmit a multicast session to a multicast group. The goal is to maximize the multicast rate (i.e. the minimum achievable user rate) subject to a total power constraint. We assume the use of an erasure code (e.g., a Reed–Solomon code) or rateless code (e.g., Luby transform c...

For a wireless video sensor network (WiViSeN) where video nodes have been placed at some strategic locations to capture designated scenes, an immediate challenge is to locate the base-station optimally such that the network lifetime of batterypowered video nodes can be maximized. This paper presents two schemes, one centralized and the other distributed, to obtain the optimal base-station locat...

The need to support evolving standards, rapid prototyping and fast time-to-market are some of the key reasons for desiring programmability in future wireless base-stations. However, supporting highly complex signal processing algorithms for multiple users at high data rates (in Mbps), requiring billions of operations per second, while providing power efficiency present challenges in attaining t...