Efficient and reliable slice allocation for multi-services in DVB-T2 networks

Digital television terrestrial broadcasting (DTTB) networks can help to alleviate the congestion problem in cellular networks by delivering rich contents to a large number of clients simultaneously. In particular, recently, there is a strong interest of extending current DTTB systems to support multimedia broadcasting services. The lack of return channel and long transmission time interval however impose great challenge to the resource allocation for this application in DTTB networks. This paper studies reliable resource allocation for multi-services with data delivery delay constraints in the second generation digital video broadcasting terrestrial (DVB-T2) system. To solve this challenging problem, the data cells of a T2-frame are divided into data slices which are indexed by binary numbers. These data slices are organized in a binary tree, and each node in the tree is associated with a certain number of nonadjacent data slices. Then a node can be allocated to a service by using the predefined policies. Based on this scheme, this paper proposes a heuristic algorithm to allocate resources to multi-services. Simulation results validate the effectiveness of the proposed algorithm and demonstrate its advantage over the current resource allocation scheme in DVB-T2 networks.