Mobile communication

Câu 1 Nội dung câu hỏi GSM là viết tắt của A. Global System for Mobile Technology B. Global System for Mobile Communications C. Global Shared Memory D. General System for Mobile Communications Tần số làm việc của hệ thống GSM là: a) 800 và 1800 Mhz b) 800, 900, 1800 và 1900 Mhz c) 900, 1800, 1900 Mhz d) 900, 1800

24p phanconglai 13-10-2012 659 178   Download

In the 6G mobile networks, ensuring low latency and low energy consumption is paramount. This study explores a novel approach for addressing these issues in a backscatter communication (BC) - based multiple user unmanned aerial vehicle (UAV) - enabled mobile edge computing (MEC) Internet of Things (IoT) network.

7p vibenya 31-12-2024 3 1   Download

A bit (binary digit) is the smallest unit of information • N = 2n where N is the number of representations and n is the number of bits (ex. ASCII, Unicode, PCM code etc.) • Data communications transfer information using codes that are transmitted as signals (either analog or digital) • In general, analog lines provide a slow service that contains high error rates.

59p trungkiendt9 24-04-2011 99 18   Download

The Distribution system interconnects multiple BSSs. 802.11 standard logically separates the wireless medium from the distribution system – it does not preclude, nor demand, that the multiple media be same or different. An Access Point (AP) is a STA that provides access to the DS by providing DS services in addition to acting as a STA.

100p nammo0168 15-05-2011 120 33   Download

The AMS(R)S provides voice and data connectivity to users such as air traffic controllers, pilots and aircraft operators The AMSS comprises satellites, aeronautical earth stations (AESs), ground earth stations (GESs) and associated ground facilities such as a network coordination center. 7 Existing satellite systems in operation for aeronautical communications Inmatsat, MTSAT Iridium

30p hanampro91 10-05-2013 76 8   Download

High Frequency Data Link, or HFDL, is part of ARINC’s GLOBALink end-to-end communication system The HFDL system is a segment of the Aircraft Communications Addressing and Reporting System (ACARS) used to exchange Airline Operational Control (AOC) and Air Traffic Control (ATS) messagesbetween aircraft end systems and corresponding ground-based stations. GLOBALink/HF provides HF-based, air-to-ground digital communications with aircraft using ARINC 635 protocol. The HFDL system uses the principles of geographic diversity and frequency diversity to optimize HF propagation...

35p hanampro91 10-05-2013 66 4   Download

The terminal performs continuous measurements on its own and neighboring cells and send measurement reports when required. Once the measurement report is sent the serving eNB can take a handover decision and start the handover preparation phase. When the terminal successfully receives the handover command no more communication is required in the source cell T1 is the time from when the handover should occur until it do occur.

22p quanot 26-08-2013 43 3   Download

Chương 3 giới thiệu một số hệ thống điện thoại di động như: Các hệ thống điện thoại di động thế hệ thứ nhất (Hệ thống điện thoại di động kỹ thuật tương tự, Advanced Mobile Phone System), các hệ thống điện thoại di động thế hệ thứ hai (Global System for Mobile Communication). Mời các bạn cùng tham khảo để nắm bắt các nội dung chi tiết.

52p namthangtinhlang_04 15-11-2015 157 36   Download

Chương 3 giới thiệu về các hệ thống điện thoại di động. Trong chương này, người học sẽ tập trung tìm hiểu hai hệ thống điện thoại di động, đó là các hệ thống điện thoại di động thế hệ thứ nhất và các hệ thống điện thoại di động thế hệ thứ hai. Mời các bạn cùng tham khảo để biết thêm nội dung chi tiết.

53p kiepnaybinhyen_04 15-12-2015 114 11   Download

Trong chương này sẽ trình bày những đặc điểm cơ bản của internet thế hệ mới. Nội dung trình bày gồm có: Multimedia communication, IPv6, Mobile Internet Communication, Ad-hoc network, Optical network.

47p tieu_vu16 03-01-2019 52 6   Download

The mobile phone is a ubiquitous portable device capable of generating and displaying narrative content in the form of voice communications, text, images and video. It could be said that hybrid devices such as the mobile phone can create hybrid narratives. It is the aim of this exegesis to outline the theories, concepts and artistic practices that inform the design, production and display of narrative content that utilizes the potential of the mobile phone as a tool for storytelling.

82p runthenight05 01-03-2023 12 4   Download

In this thesis, focus on the wireless links between devices equipped by deployed operating personnel and intermediary access point infrastructure. We use multi-radio (MR) platforms, wireless devices with multiple and diverse transceiver technologies, to produce robust and reliable links through adaptive control of available transceivers. Primarily, we study the application of intelligent control techniques, namely reinforcement learning (RL), for adaptive control over diverse transceivers to achieve the desired robustness and reliability under dynamic environmental conditions.

185p runthenight04 02-02-2023 8 2   Download

This thesis explores contemporary experiences of entrepreneurial knowledge work in emerging and rapidly changing areas of economy and society through a detailed ethnographic analysis of the motivations, social practices and changing experiences of a pioneering Coworking community in Melbourne, Australia. Coworking is a complex social phenomenon.

481p runthenight04 02-02-2023 11 3   Download

Summary of the Doctor thesis of Sociology: Role of grassroots socio political organizations in ensuring social security for rural residents: Case study in 2 communes with content to understand the role of grassroots socio-political organizations in ensuring social security for rural residents through the implementation of this organization, supporting labor market policies and social assistance in rural communities. On that basis, a number of recommendations are proposed to improve the performance of socio-political organizations in the context of current social change. Invite you to refer.

18p lanxichen 05-05-2020 41 4   Download

Bài 3 và 4 của bài giảng Lập trình Windows Phone (Module 4) trang bị cho người học những kiến thức về WCF và Cloud. Trong bài giảng này người học sẽ tìm hiểu hai nội dung chính, đó là: WCF – Windows Communication Foundation, Windows Azure Mobile Services. Mời các bạn tham khảo.

18p kiepnaybinhyen_01 27-11-2015 69 5   Download

The objective of the study: Analyze and evaluate the competitiveness of the state providing mobile communication services of a telecom company in Vietnam, comparing the strengths and weaknesses of the provision of services between the companies together and find out the problems to be solved in order to improve their competitiveness;...

0p nguyenthiminh32 12-07-2014 70 6   Download

Bài giảng học phần Mạng máy tính: Phần 6 giới thiệu về Internet thế hệ mới. Các nội dung có trong bài giảng như: IPv6, Mobile Internet Communication, Ad‐hoc network. Mời bạn đọc tham khảo để hiểu rõ hơn về các nội dung trên.

12p hoa_loaken91 30-05-2014 73 6   Download

Communication Systems Lecturer: M.E. P.T.A. Quang .Contents           Chapter 1: Introductory Concepts Chapter 2: QoS Chapter 3: Transmission and switching Chapter 4: Digital networks Chapter 5: Signaling Chapter 6: PSTN Chapter 7: VoIP Chapter 8: Mobile communication Chapter 9: Satellite communication Chapter 10: Fiber-optic communication .

20p vanmanh1008 24-06-2013 110 7   Download

In recent years, possible health hazards due to radiofrequency radiation (RFR) emitted by mobile phones have been investigated. Because several publications have suggested that RFR is stressful, we explored the potential biological effects of Global System for Mobile phone communication at 900 MHz (GSM-900) exposure on cultures of isolated human skin cells and human reconstructed epidermis (hRE) using human keratinocytes.

17p inspiron33 23-03-2013 52 3   Download

Linking Behavioral Economics, Axiomatic Decision Theory and General Equilibrium Theory This chapter has used the Tiebout choice process—the choice of school characteristics via housing decisions—as a lens through which to study the strength of parental preferences for effective schools relative to those for other neighborhood or school characteristics.

269p mualan_mualan 25-02-2013 60 8   Download