 Remote starting control apparatus and starting control apparatus |
| It is therefore an object of the invention to provide a remote starting control apparatus for ... |
|
| Method and apparatus for reduced intermodulation distortion in a radio transceiver |
| Distortion is a significant problem in telecommunication systems. While there are several types, ... |
|
| Security system |
| The present invention relates to a security system and method in which a base unit at a monitored ... |
|
| Device and system to facilitate accessing electronic mail from remote user-interface devices |
| Accordingly, it is an object of this invention to at least partially overcome the disadvantages of ... |
|
| System and apparatus for selectively publishing electronic-mail |
| Accordingly, in view of the above background, it is an object of the present invention to publish a ... |
|
| Method and apparatus for performing enterprise email management |
| An enterprise email management system is disclosed. The enterprise mail system is designed to ... |
|
| Compliance archival data process and system |
| OF THE INVENTION First briefly in overview, the present invention provides a data processing ... |
|
| Pre test electronic mail process |
| The present invention provides a method and apparatus which operates completely in the background (... |
|
| E-mail firewall with stored key encryption/decryption |
| In a principal aspect, the present invention provides an e-mail firewall (105) for screening e-mail ... |
|
|
Method and system for variable handoff hysteresis in a radiocommunication system
| Details |
Inventors: Wijk, Per; Nordlund, Peter; Lundborg, Thomas;
Assignee: Telefonaktiebolaget LM Ericsson (Stockholm, SE)
Primary Examiner: Chin; Wellington
Assistant Examiner: Woldetatios; Yemane
Attorney, Agent or Firm: Burns, Doane, Swecker & Mathis, L.L.P.
A method and system for performing handoffs in radiocommunication systems using a time variable hysteresis value are described. By varying the hysteresis value in accordance with the amount of time that the mobile station has been using a current channel, problems associated with the measurement of signal strengths attributable to filter initialization can be avoided. |
|
DETAILED DESCRIPTION In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular circuits, circuit components, techniques, etc.
in order to provide a thorough understanding of the invention.
For example, various details are provided relating to exemplary modulation and transmitting techniques.
However it will be apparent to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details.
In other instances, detailed descriptions of well-known methods, devices, and circuits are omitted so as not to obscure the description of the present invention with unnecessary details.
For example, although the following description is scripted in the context of intercell handoff determinations, those skilled in the art will readily appreciate that the present invention is equally applicable to intracell handoff determinations.
Prior to describing the details of the present invention, an example of the construction of a cellular mobile radio system in which the present invention can be used is illustrated in FIG.
1.
FIG.
1 is a schematic diagram illustrating ten cells, C1 to C10.
Normally, systems and methods according to the present invention would be implemented in a system comprising many more cells than ten.
For the purposes of this description, however, the system depicted in FIG.
1 is considered to be an isolated region of a larger system.
For each cell C1 to C10, there is a respective base station B1 to B10.
The exemplary embodiment illustrated in FIG.
1 shows base stations situated in the vicinity of respective cell centers and having omni-directional antennas.
Those skilled in the art will readily appreciate that the base stations may be located in other areas of the cells and have other types of antennas, for example, in the vicinity of cell borders and having directional sector antennas.
FIG.
1 also illustrates ten mobile stations M1 to M10, which are movable within a cell and from one cell to another cell
|
|
Cell Phones 
