 Spatial domain matched filtering method and array receiver in wireless communication system |
| What is claimed is: 1. A spatial domain matched filtering method, comprising the steps of: ... |
|
| Automatic screen blanking in a mobile radio data terminal |
| In one aspect of the invention a data processing device with integral visual display is provided ... |
|
| Telecommunication system, and mobile station, and database, and method |
| It is an object of the invention, inter alia, to provide a telecommunication system, which offers ... |
|
| Method and system for selective call routing for transcoder free operation |
| OF EXEMPLARY EMBODIMENTS The present invention, in exemplary embodiments, provides for transcoder ... |
|
| Cellular system and frequency carrier allocation method |
| It is an object of the present invention to provide a cellular system which can increase the ... |
|
| Method and system for providing personal base station communications |
| The present invention is a novel and improved method and system for providing personal base station ... |
|
| Enhanced uplink modulated backscatter system |
| RFID system applications differ greatly in the data rate requirements for the Downlink (I... |
|
| Method and apparatus for establishing clear wireless communication |
| The present invention relates to a method and apparatus for establishing clear cellular ... |
|
| Communication controller, base station controller and communication system |
| Taking the above into consideration, it is an object of the present invention to provide a ... |
|
|
Common access between a mobile communications network and an external network with selectable packet-switched and circuit-switched and circuit-switched services
| Details |
Inventors: Forslow, Jan E.;
Assignee: Telefonaktiebolaget LM Ericsson (Stockholm, SE)
Primary Examiner: Olms; Douglas
Assistant Examiner: Nguyen; Brian
Attorney, Agent or Firm: Nixon & Vanderhye P.C.
Applications running on a mobile station or an external network entity such as an Internet service provider may specify on an individual application flow basis a requested quality of service. From that requested quality of service, an optimal type of bearer to transfer the application flow through the mobile communications network is determined. For example, a circuit-switched bearer may be allocated if the request is for a real-time service, and a packet-switched bearer may be allocated if the request is for a non-real time type of service. Various other decision making criteria may be employed. A mobile station and a mobile network gateway node each include a mapper for mapping an individual application flow to one of a circuit-switched network and a packet-switched network bearer depending on the quality of service requested for the individual application flow. The network layer quality of service parameters corresponding to an individual application flow are mapped to circuit-switched bearer parameters if the application flow is mapped to the circuit-switched network and to packet-switched bearer parameters if the application flow is mapped to the packet-switched network. The gateway node includes a common access server which permits a mobile station initially establishing a communications session with an external network entity to perform only a single, common access procedure for subsequent communications using one of the circuit-switched and packet-switched networks. After that common access procedure is completed, subsequent application flows between the mobile station and the external network entity are established using abbreviated procedures without having to access the external network entity. |
|
DETAILED DESCRIPTION The main application of most mobile radio systems like the Global System for Mobile communications (GSM) has been mobile telephony which typically only supports circuit-switched communications where guaranteed, "fixed" circuits are dedicated to a user for the duration of a call.
However, packet-switched applications, like facsimile transmission and short message exchange, are becoming popular in mobile networks.
Example data applications include wireless personal computers, mobile offices, electronic funds transfer, road transport telemetry, field service businesses, fleet management, etc.
These data applications are characterized by "bursty" traffic where a relatively large amount of data is transmitted over a relatively short time interval followed by significant time intervals when little or no data is transmitted.
While bursty traffic can be transmit using a circuit-switched channel, such a transmission underutilizes that channel because there are likely large intervals between bursts when the channel is reserved but is not being used, there is no information to be transmit from or received by the user.
From an efficiency view point, this is a waste of transmission resources which are particularly limited for radio communications.
However, from a customer service view point, because a circuit-switched channel is not shared with other users, the user is essentially guaranteed a certain quality of service.
In addition to inefficiency, it takes a relatively long time to set up and take down a circuit-switched call compared with individual packet routing in packet-switched sessions.
In bursty traffic situations, packet-switched bearers better utilize the transmission bandwidth because a communications resource is used only when there is data to transmit.
Communication channels are therefore typically shared by many users.
Another advantage is that in contrast to time-oriented charging applied for circuit-switched connections, packet-switched data services allow charging depending on the amount of data actually transmitted and on the quality of service of that transmission
|
|
Cell Phones 
