Time division duplex systems, in a convenient way, facilitates the implementation of asymmetrical links required to efficiently handle the increasingly asymmetric traffic offered by current and future wireless applications. If boundaries between uplink and downlink time-slots are not synchronized among cells, e.g. when different asymmetries are required in different cells, inter-base station (I...

Network function virtualization (NFV) is a promising technology to make 5G networks flexible and agile. NFV decreases operators' OPEX CAPEX by decoupling the physical hardware from functions they perform. In NFV, users' service request can be viewed as chain (SFC) consisting of several virtual network (VNFs) which are connected through links. Resource allocation in done centralized authority ca...

We use a mean-variance model to analyze the problem of decentralized portfolio management. We find the solution for the optimal portfolio allocation for a head trader operating in n different markets, which is called the optimal centralized portfolio. However, as there are many traders specialized in different markets, the solution to the problem of optimal decentralized allocation should be di...

Efficient allocation of resources is the cornerstone of market economy, and migration of people is an elementary part of the allocation mechanism. This paper presents a simple club theoretic model of migration between cities. In the model, welfare in a city depends on its size, and people migrate between cities in seek for welfare gains. Migration alone can produce stable and efficient market s...

In this paper, we propose the heterogeneous CDMA (H-CDMA) protocol, a time code division multiple access (TCDMA) protocol consisting of the centralized single-allocation function (CSF), the centralized multipleallocation function (CMF), and the distributed multiple-allocation function (DMF). CSF or CMF can achieve high throughput and support differentiated service quality in conventional cellul...

A novel concept in available bit rate (ABR) service model as de ned by the ATM Forum is the minimum cell rate (MCR) support for each ABR virtual connection. In this paper, we present a fundamental study of rate allocation policies with MCR guarantee. In particular, we de ne three network bandwidth allocation policies that guarantee MCR requirements. For each policy, we present a centralized alg...

The allocation of risks among the contracting parties in a contract is an important decision affecting the project success. Some risks in a project are uncontrollable; these are imposed to a project by external factors. Since contracting parties can neither control nor affect the occurrence of such risks, their allocation to a party would be inequitable. Therefore the cost overrun related to un...