| 摘要 |
A battery sharing method to increase the service life of the batteries of PMR terminals having important uses, such as the terminal of the head of a group such as the police, firefighters, or the like, is disclosed. The technique is based on the detection of neighboring networks and/or neighboring nodes. The detection is facilitated by reiterating a selection (or reselection) of cells and a handover (HO)/vertical handover (VHO) procedure, while relaying and coordinating transmission and reception. The aim of the techniques is to improve communications as well as the duration thereof, in order to enable improved management of the battery of each terminal and to broaden coverage in areas that are not served by a network. |
| 主权项 |
1. A method for establishing a strategy for saving energy of a battery of a mobile terminal belonging to a same user group, so as to allow a private and/or professional mobile radio used of said terminals, the method comprising, for each terminal of said group, any of the following steps follow any other:
determining a state of charge of the battery:
when the battery is fully charged, determining an operational mode of a RRC layer of the terminal;when the operational mode of the RRC layer of the terminal is in idle state, then:
carrying out a search for all the long-range, or short-range networks available;when the operational mode of the RRC layer of the terminal is connected, then:
sending data messages to the other terminals belonging to the same user group;updating a MIIS server via notifications of information relating to the availability of neighbouring networks which is collected in a local database of said terminal;when a more suitable network has been detector, launching a Handover procedure initiated either by the network, or directly by a controller of the terminal;when the battery is half-charged, determining the operational mode of the RRC layer of the terminal:
when the operational mode of the RRC layer of the terminal is in idle state, then:
carrying out a search for all the long-range networks available;when the operational mode of the RRC layer of the terminal is connected, then:
sending data messages to all the terminals;determining all the long-range networks available in order to update a database server;carrying out a Handover procedure if the terminal deems it to be necessary;when the battery is insufficiently charged, determining the operational mode of the RRC layer of the terminal:
when the operational mode of the RRC layer of the terminal is in idle state, then:
determining whether a cell reselection has occurred;when a cell reselection has occurred, requiring the MIIS server;sending the position of the terminal to the base station to which it is connected, in order to determine which networks are available in the vicinity thereof;determining whether it is possible to carry out a cell reselection procedure for one of the most suitable networks listed by the MIIS server:when a cell reselection procedure can be carried out, carrying out the reselection procedure;when a cell reselection procedure cannot be carried out, reiterating the reselection procedure with the most remaining suitable networks, which have been listed;when no attempt for reselecting networks present in the list has been successful, carrying out a network scanning, similar to the one carried out when the battery is fully charged;
when the operational mode of the RRC layer of the terminal is connected, then:
no research for neighbouring networks is carried out any longer, and determining whether a cell reselection has been carried out:when a cell reselection has been carried out, requiring the MIIS server;sending data messages to the other terminals;requiring the available networks in proximity of the position of the MIIS server from the latter;determining whether it is possible to carry out a Handover procedure for one of the two or three most suitable networks, which have been listed by the MIIS database, for the terminal to be able to be connected thereto:
when a Handover procedure is possible, carrying out by the controller of the terminal a Handover procedure;when a Handover procedure is not possible, reiterating by the controller of the terminal the Handover procedure with the remaining networks from the list;when no Handover attempt has been successful with one of the networks from the list, directly carrying out by the controller of the terminal a network scanning. |
