NTT DoCoMo

About: NTT DoCoMo is a based out in . It is known for research contribution in the topics: Base station & Mobile station. The organization has 4032 authors who have published 8655 publications receiving 160533 citations.

Mobile terminal apparatus, radio base station apparatus and radio communication method

Abstract: To provide a mobile terminal apparatus, radio base station apparatus and radio communication method capable of supporting user multiplexing methods for enabling more users to be efficiently multiplexed on an uplink shared channel, the mobile terminal apparatus performs spreading processing for multiplying a data signal by a code varying for each user, and transmits the spreading-processed data signal to the radio base station apparatus on the uplink shared channel, and the radio base station apparatus receives the data signal, and user-separates a reception signal in which is mixed a plurality of users multiplied by spreading codes varying for each user into desired user signals to be data signals for each user.

Radio base station and communication control method

Abstract: A radio base station includes: a measurement unit which measures a resource use amount in each time frame within predetermined period; a downlink persistent allocation signal transmission unit which transmits to a mobile station, a persistent allocation signal indicating a downlink radio resource allocation start moment; and a downlink communication unit which transmit downlink data using downlink radio resource starting at the downlink radio resource allocation start moment. The downlink persistent allocation signal transmission unit decides the downlink radio resource allocation start moment in accordance with a resource use amount in each time frame.

Reshaping the Mobile core network via function decomposition and network slicing for the 5G era

Abstract: Industrial and academic focus in recent years has been shifting towards the Fifth Generation Mobile Networks (5G). In the horizon 2020, the key improvements will rely on technical breakthroughs in the radio access networks, mainly to bring increased bandwidth to the user devices. However, there is still much discussion ongoing about the evolution required in the core network to accommodate increased demands from existing services (e.g. in the number of devices) and services which are not feasible or efficiently implemented with today's architecture. Disruptive approaches can even be considered if the horizon for such changes is extended to 2025. Due to the advance of virtualization and SDN technologies, it is very promising that the current mobile core network could gain more flexibility, support multiple radio access network generations in parallel, and meanwhile enrich its ecosystem to generate new revenue opportunities. In this paper, we would like to discuss the feasibility to design a flexible and adaptive mobile core network based on functional decomposition and network slicing concepts. This paper will provide a guideline and enlighten strategic directions for future mobile core network research.