Cooperative Transmission Scheme in Metropolitan Environment

Benefiting from the developments of the wireless technologies, users can access the Internet and demand data anytime and anywhere. more and more users are used to acquire information by way of their mobile devices, such as smart phones, laptops, and tablet PCs. in addition, to engage more subscribers, service providers strive for supplying users with novel and practical network services. Due to the rapid growths of the number of users and the variety of network services, expanding the network capacities is more urgent. Therefore, researchers keep devoting to design more powerful wireless technologies. for example, 3GPP has been drawing up a novel wireless technology, named Long Term Evolution (LTE), which can provide more than 100Mps peak rate and is regarded as one of the probable candidates for 4G. However, the developments of wireless technologies do not suffice for the rapidly growing demands on network capacities. Most of users still unsatisfy the network performances in terms of data rates, transmission delays, and so on. in order to meet the requirements of users, a novel cooperative transmission scheme is presented in this paper. the proposed cooperative transmission scheme allows users to temporarily expand their network capacities by the help of their neighbors. the proposed scheme provides better user experience and flexibly utilizes the available network resources. the simulation results show that the proposed scheme can greatly reduce the transmission time and improve the qualities of network services.