Multi-frequency network

Introduction

Data networks, such as wireless communication networks, have to trade off between services customized for a single terminal and services provided to a large number of terminals. For example, the distribution of multimedia content to a large number of resource limited portable devices (subscribers) is a complicated problem. Therefore, it is important for network operators, content retailers, and service providers to have a way to distribute content and/or other network services in a fast and efficient manner and in such a way as to increase bandwidth utilization and power efficiency.

Description

A multi-frequency network (MFN) is a network in which multiple radio frequencies (RFs) (or RF channels) are used to transmit media content. One type of MFN is a horizontal multi-frequency network (HMFN) where a distribution waveform is transmitted over different RF channels in different local areas. The same or different content may be transmitted as part of distribution waveforms carried over different RF channels in such local areas. Another type of MFN is a vertical multi-frequency network (VMFN) in which multiple radio frequency (RF) channels are used in a given local area to transmit independent distribution waveforms with an aim to increase the capacity of the network (in terms of the ability to deliver more content to a device/end user). An MFN deployment may also consist of VMFN in certain areas and HMFN in certain other areas.

In a typical VMFN, a local operations infrastructure (LOI) comprises transmitting sites that operate to transmit multiple distribution waveforms over multiple RF channels in a selected geographic area. Each distribution waveform may comprise one or more content flows that can be selected at a receiving device for rendering. Adjacent LOIs may utilize the same or different RF channels.

During operation, a receiving device may perform an RF channel switch as a result of a user request or an application request to acquire content on another RF channel. The device may also perform an RF channel switch if content acquisition failure happens for desired content e.g. due to device mobility. The device mobility is defined as the device moving from the coverage area of the current LOI to the coverage area of other neighboring LOIs. The content acquisition failure can also happen due to varying channel conditions without involving device mobility. Typically, the device may switch to any available RF channel that carries the desired content flow. In the case of content acquisition failure due to device mobility, the coverage areas of two or more LOIs may overlap so that multiple RF channels may be available that carry the desired content. These available RF channels belong to different LOIs, and each LOI may comprise a wide variety of additional content carried on other RF channels. If the device randomly selects an RF channel that carries the desired content from the available RF channels, the LOI associated with the selected RF channel may not carry the most additional content. For example, the LOI associated with the selected RF channel may carry less content than LOIs associated with other available RF channels.

Therefore, it would be desirable to have a system that operates to allow a device to select an RF channel carrying the desired content that is associated with a LOI that has the most additional content, thereby providing the device with the ability to switch to the additional content in a fast and efficient manner for an enhanced user experience. It uses OFDM system not COFDM.

• MFN and SFN over IP

• RF with MFN

This broadcasting-related article is a stub. You can help Wikipedia by expanding it.v · Categories: Radio resource management Broadcasting stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем решить контрольную работу Tomorrow Lies in Ambush Action of 3 September 1773 Look at other dictionaries: Single-frequency network — For other uses, see SFN (disambiguation). A single frequency network or SFN is a broadcast network where several transmitters simultaneously send the same signal over the same frequency channel. Contents 1 Overview 2 OFDM and COFDM 3 DVB T SFN …   Wikipedia Multi-frequency time division multiple access — MF TDMA (Multi Frequency, Time Division Multiple Access) is the leading technology for dynamically sharing bandwidth resources in an over the air, two way communications network. Many variations of MF TDMA technology (including simple TDMA) exist …   Wikipedia Dual-tone multi-frequency signaling — One of the few production telephone DTMF keypads with all 16 keys, from an Autovon Telephone. The column of red keys produces the A, B, C, and D DTMF events. Dual tone multi frequency signaling (DTMF) is used for telecommunication signaling over… …   Wikipedia Dual-tone multi-frequency — (DTMF) signaling is used for telephone signaling over the line in the voice frequency band to the call switching center. The version of DTMF used for telephone tone dialing is known by the trademarked term Touch Tone (canceled March 13, 1984),… …   Wikipedia Multi-core processor — Diagram of a generic dual core processor, with CPU local level 1 caches, and a shared, on die level 2 cache …   Wikipedia Multi-Use Radio Service — In the United States, the Multi Use Radio Service (MURS) is an unlicensed two way radio service similar to Citizens Band (CB). Established by the U.S. Federal Communications Commission in the fall of 2000, MURS created a radio service allowing… …   Wikipedia Network analysis (electrical circuits) — Linear Network Analysis Elements …   Wikipedia Multi-carrier code division multiple access — (MC CDMA) is a multiple access scheme used in OFDM based telecommunication systems, allowing the system to support multiple users at the same time. MC CDMA spreads each user symbol in the frequency domain. That is, each user symbol is carried… …   Wikipedia Multi-user MIMO — In radio, multi user MIMO (MU MIMO) is a set of advanced MIMO, multiple input and multiple output (pronounced mee moh or my moh), technologies that exploit the availability of multiple independent radio terminals in order to enhance the… …   Wikipedia Multi-core — A multi core processor (or chip level multiprocessor, CMP) combines two or more independent cores into a single package composed of a single integrated circuit (IC), called a die, or more dies packaged together. The individual core is normally a… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”