Due to lack of resources such as transmission power and Bandwidth in satellite systems, resource Allocation problem is a very important challenge. Nowadays, new heterogeneous network includes one or more satellites besides terrestrial infrastructure, so that it is considered that each satellite has multi-beam to increase capacity. This type of structure is suitable for a new generation of communications, which leads to a specific benefit of using the available resource in wireless communication systems. The multi-beam technology is one of the multiple access methods for new satellite systems that are similar to very high throughput satellites systems. Therefore, in this paper, our proposed algorithm is mainly the jointly power and Bandwidth Allocation of satellite systems to each beam and it is simulated considering the limitation of the total transmission power and Bandwidth constraints for any beams. Furthermore, a Bandwidth sharing algorithm is provided to dedicate extra Bandwidth among beams. Finally, the total capacity of our proposed system model, which is heterogeneous network is obtained based on some parameters such as frequency reuse, modulation rate and total number of users for each beam. This comparison shows that the proposed algorithm allows maintaining the optimal capacity Allocation to use a new satellite network.

Data-Over-Cable Service Interface Specifications) DOCSIS) is developed for data transmissions over cable networks. DOCSIS is intended to support IP flows with significantly higher data rate links for high quality data, audio, video and interactive services. It is important to provide traffic scheduling mechanisms to support Quality of Service (QoS) for such applications. DOCSIS defines six upstream services for supporting per-flow QoS. Among them it uses rt-PS service for real-time VBR traffic which has burst nature. The Headend provides periodic opportunities for unicast request, namely polling, which yields higher delay and not suitable for real-time services. In this paper, a novel scheduling mechanism and Bandwidth Allocation algorithm has been proposed to support VBR multimedia traffic over DOCSIS. The proposed Dynamic Unsolicited Grant Service) DUGS) scheduling algorithm makes use of piggybacking request and changes the unsolicited grant size Allocation dynamically. It is shown through simulation results that throughput, channel utilization and delay performance have been improved in case of DUGS, compared with current DOCSIS protocol. This algorithm can also keep fairness among connections.

One of the key challenges in next generation access networks based on Ethernet Passive Optical Network (EPON) technology is Dynamic Bandwidth Allocation (DBA) process. In this paper we have proposed ‘Parnian’, a two-stage nested-auction for dynamic Bandwidth Allocation management in Ethernet Passive Optical Networks. In the proposed ‘Parnian’ method, by running nested auction, based on EPON architecture, the Optical Network Units locally optimize the users' Bandwidth requests by first stage auction and then the Optical Line Terminal runs the second stage auction for allocating the requested Bandwidths dynamically and effectively. Simulation results show that ‘Parnian’, in comparison with the Fair Sharing with Dual Service Level Agreement (FSD-SLA) and limited service Interleaved polling with adaptive cycle time (IPACT) experiences more delay, but regarding other quality of service parameters such as execution time, packet loss ratio, line utilization, and throughput, it has a better performance.

In the foreseeable future, networks of access devices that can cooperate and effectively communicate with military backbone infrastructure will significantly influence and simplify military operations. As one of the promising solutions for developing next generation military networks, Ethernet Passive Optical Network (EPON) has received great attention from both industry and academia in recent years. Based on the EPON technology, Bandwidth constraint is a critical issue in military communication. In this paper we propose Peris, a novel dynamic Bandwidth Allocation method with second price auction in next generation military networks based on EPON technology. In this new method, the OLT (similar to the leaders) is responsible for the auction management which effectively and fairly responds to the Bandwidth requests of the users through their own ONUs and allocates the winners the amount of requested available Bandwidth. Simulation results show that comparing Peris with IPACT, regarding QoS parameters such as packet loss ratio, line utilization and throughput, it has better performance.