Andrew Grundy

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We propose an approach for opportunistic forwarding that supports optimization of multipoint high volume data flow transfer while maintaining high buffer availability and low delays. This paper explores a number of social, buffer and delay heuristics to offload the traffic from congested parts of the network and spread it over less congested parts of the(More)
This paper is concerned with congestion aware forwarding algorithms within opportunistic networks. We remove the reoccurring assumption of unlimited storage, and make it evident that congestion is a prominent problem that needs to be addressed. We propose a distributed congestion control algorithm that adaptively chooses the next hop based on contact(More)
Detecting and dealing with congestion in delay tolerant opportunistic networks is an important and challenging problem. In this paper we describe CAFREP, a unified congestion control framework for routing in such networks that adapts both data sending rates and data forwarding policies through a novel reactive fully distributed approach. CAFREP enables(More)
Social network based forwarding algorithms for opportunistic networks, such as Pocket Switched Networks, are primarily concerned with throughput and efficiency. In this paper we seek to improve our understanding of how forwarding based on a heuristic that favours connectivity causes unfair load distribution, which in turn leads to congestion. We propose a(More)
This paper describes the design, development and evaluation an interest driven overlay on the top of our congestion aware forwarding protocol (CAFe) for social opportunistic networks. We show that P2P filecasting on top of Cafe achieves high success ratio of answered queries and high availability of intermediary nodes while maintaining fast downloads.
BACKGROUND Service users wish to be involved in care planning but typically feel marginalized in this process. Qualitative explorations of the barriers and enablers of user involvement in mental health care planning are limited. QUESTION How is user involvement in care planning conceptualized by service users and how can meaningful involvement be(More)
BACKGROUND Involving service users in planning their care is at the centre of policy initiatives to improve mental health care quality in England. Whilst users value care planning and want to be more involved in their own care, there is substantial empirical evidence that the majority of users are not fully involved in the care planning process. Our aim is(More)
BACKGROUND There is limited evidence for the acceptability of training for mental health professionals on service user and carer involved care planning. AIM To investigate the acceptability of a co-delivered, two-day training intervention on service user and carer involved care planning. METHODS Community mental health professionals were invited to(More)