China Mobile Research Institute

About: China Mobile Research Institute is a based out in . It is known for research contribution in the topics: MIMO & Wireless network. The organization has 579 authors who have published 542 publications receiving 13897 citations.

An information-diffusion-based routing scheme in wavelength-routed WDM mesh networks

Abstract: We propose a novel information-diffusion-based routing (IDBR) scheme in wavelength routed WDM mesh networks. The IDBR scheme has the fast convergence and the low bandwidth consumption of OSPF-TE while requires lower computational complexity as RIP.

Empirical analysis of the dependence structure in traffic data using copula function

Abstract: Statistical distributions of link and path travel times are important inputs to reliability-sensitive transportation models. This paper proposes to use copula functions for specifying and calibrating a tractable dependence structure for link travel times. Our empirical study indicates that travel time data tend to have a quasi-tail dependence structure, which is inconsistent with those embedded in commonly used copulas. This means that comparing with traditional fields using copula function, such as financial, traffic data demonstrate special features. A new copula function needs to be proposed to model this newly discovered feature.

Opening up telecom networks with a lightweight web element service cloud for ordinary users in the web 2.0 era

Abstract: Service creation by ordinary users without technical know-how has become increasingly popular in the Web 2.0 era. There is a growing need for ordinary Web 2.0 users to embed telecom services into their existing web applications such as blog, wiki, or online shops’ homepages without conventional programming. However, the current open APIs, SDK, and graphical service creation environment technologies are mainly aimed at experienced developers with professional technical knowledge, rather than ordinary Web 2.0 users. To facilitate the latter’s use of telecom network services in their web applications, this article proposes a novel web-element-based exposure approach for such services. It encapsulates lowlevel APIs in a series of customised independent web elements, which can be directly embedded in the web page by the Customization-Copy-Paste feature. The flexible invocation of telecom services by ordinary Web 2.0 users will greatly promote web-based telecommunication applications.

AI-enhanced constellation design for NOMA system: A model driven method

Abstract: Grant-free Non-orthogonal Multiple Access (GF-NOMA) is a promising technology for massive access users and sporadic small-packet transmission for Beyond the 5th Generation mobile communication system(B5G) / the 6th Generation mobile communication system (6G). One of the key aspects in GF-NOMA system is the signature/constellation design. However, due to the channel variation and random activation of users, conventional optimization approaches seem unsuitable for such complex models. In this paper, as an initial attempt, we propose a human intelligence (HI)-guided artificial intelligence (AI)-enhanced signature/constellation design method. By separate design of modulation and power allocation inspired by prior knowledge, the proposed deep neuron network (DNN) for NOMA signature/constellation design not only has smaller size of DNN and less training data, but also has stronger interpret-ability. In the last section, via simulations we demonstrate that in terms of bit error rate, the proposed scheme can achieve significant performance gain over the conventional NOMA schemes.

TD-LTE network indoor offloading study in a realistic metropolitan scenario

Abstract: In the wireless broadband network, most traffic are generated from indoor users. Meanwhile the indoor coverage is identified as the major bottleneck especially in dense urban environment with high-rising buildings. In this paper, the TD-LTE network downlink performance of indoor is studied with various network deployment options, including outdoor Macro cell, outdoor Micro cell, indoor distributed antenna system (DAS), indoor Femto cell, and their combinations in a realistic large-scale dense urban scenario. Since a DAS cell consists of several or even tens of access points (AP), the computation load is too high to be accepted when calculating the received signal power and the interference power by traditional widely-used methodology. Thus a new DAS model is proposed to decrease the computation complexity to a reasonable level in the simulation. To have more accurate channel modeling, the real three-dimensional (3D) city map of the investigated area is employed. A 3D ray-tracing tool is used to estimate the large scale propagation occurring between outdoor sites and buildings. The traffic offloading features of Micro, DAS, and Femto cell are evaluated through system simulations.