Ericsson Gmbh

Telefonaktiebolaget Lm Ericsson (publ)

David James Hoover

Nadi Sakir Findikli

Keith William Anderson

Scott Gordon Hicks

Amish Kirit Shah

Wail Refai

James E Beckman

Hassan I Hassan

Methods for acquiring service for a wireless terminal can include the steps of camping on a control channel and receiving a request for an operation to be performed by the wireless terminal that is performed by the wireless terminal mutually exclusive of camping on the control channel. Control channel information associated with the control channel on which the wireless terminal was camped is stored and the requested operation is performed. The stored control channel information is used to acquire service for the wireless terminal. Related wireless terminals and systems are disclosed.

Methods, wireless terminals, and systems for acquiring service using stored TDMA digital control channel information

A method of controlling a mobile terminal allows it to search for possibly higher priority service providers in response to receiving an indication that more than the default number of service providers is available in a given service area, without dropping its current radio channel. When only the standard number of service providers is available in a given area, the mobile terminal uses standard frequency bands and corresponding radio channel allocations during scanning operations. When more than the standard number of service providers is available, the mobile terminal uses received information defining the non-standard spectrum allocation supporting the available service providers in its scanning operations. In a wireless communication system operating in accordance with TIA/EIA-136 standards, the mobile terminal may scan its current hyperband, alternate hyperband, or both the current and the alternate hyperbands (e.g., 800 MHz and 1900 MHz hyperbands), for higher priority service providers.

Triggered hyperband scanning

A method of message management is provided for use with a mobile communications device having core and protected memories. The mobile communications device is in communication with a radio telecommunications system comprised of authorized and unauthorized radio telecommunications system operators, each operator have a unique identification code which is associated with messages communicated therefrom. The method of message management includes the step of storing the identification code of the authorized system operator in the core memory, receiving a message with an identification code associated therewith from the radio telecommunications system, and comparing the identification code of the message with the identification code of the authorized system operator. The method further includes the step of storing the message in the protected memory only if the identification code of the message matches the identification code of the authorized system operator. An apparatus is also provided for practicing the above mentioned method.

Security system and method

The present invention provides a new method for determining the point at which the mobile station is required to transmit a periodic registration to the base station when the mobile station is locked onto a DAMPS Digital Control Channel. The REGID system clock in the mobile station is replaced with a timing mechanism termed REGID_PER_TMR. Instead of tracking the REGID system clock from zero to NXTREG, REGID_PER_TMR is a function of the NXTREG permanent variable and the REGID_PER variable transmitted in the Registration Parameters FBCCH message. Thus, REGID_PER_TMR is calculated as a specific time period as a function of NXTREG and REGID_PER on power up of the mobile station and does not need to be stored within the memory of the mobile station. REGID_PER_TMR then functions as a countdown timer relative to NXTREG such that the mobile station automatically executes Periodic Registration Determination per IS 136.1, Section 6.3.9 on expiration of REGID_PER_TMR. Since the REGID system clock has been eliminated, the value of REGID is calculated on an as-needed basis from other parameters.

Predictive registration identification timer

A method and intelligent roaming mobile station for emulating a pre-intelligent roaming scanning routine used by a pre-intelligent roaming mobile station. The method includes the steps of selecting a search scheme from a plurality of search scheme, and restricting an intelligent roaming scanning routine to scan only the service bands within an 800 MHZ spectrum. In response to the selected search scheme, the intelligent roaming mobile station then prioritizes at least one service band operating in the 800 MHZ spectrum into a band scan order. Thereafter, the intelligent roaming mobile station scans for a channel according to the prioritized band scan order, where the channel connects a service provider to the intelligent roaming mobile station according to the selected search scheme.

Intelligent roaming mobile station for emulating a pre-intelligent roaming mobile station

A mobile station and an intelligent roaming method for selecting a best service provider from a plurality of service providers. The mobile station includes a database for storing a plurality of identifier codes that correspond with the plurality of service providers. The database also has an overlap flag added to each of the stored identifier codes. The mobile station uses the intelligent roaming procedure to locate a first channel and a second channel broadcast by the service providers, where each channel contains one of the stored identifier codes and at least one of the located and stored identifier codes has an overlap flag that is set. The intelligent roaming procedure evaluates channel information associated with the first channel and channel information associated with the second channel to select a best channel for supporting a call. Thereafter, the mobile station selects the best service provider by utilizing the selected channel.

Method and apparatus for selecting a service provider

A method for responding to a pointer received on an analog control channel pointing to a control channel belonging to a forbidden service provider includes avoiding a power-up scan and resuming camping on the analog control channel. A wireless communications mobile unit is camped on an analog control channel may receive a channel pointer to a digital control channel. If the digital control channel has acceptable received signal strength, the service provider information for that control channel is checked. If the control channel belongs to a non-forbidden service provider, the mobile unit camps on the digital control channel. If the control channel belongs to a forbidden service provider, the mobile unit returns to camping on the analog control channel without performing an intervening power-up scan. By avoiding power-up scans when the pointed-to channel belongs to a forbidden service provider, less power is consumed and users receive more consistent communications service.

Method for responding to DCCH pointers

A method for providing a mobile station user notification of the delay of requested teleservice transaction is disclosed. Upon receipt of a request at a mobile station for origination of a teleservice transaction, the mobile station determines whether the transaction may be immediately carried out or will be delayed. If the transaction is delayed, the time period for this delay is determined. The mobile station user is notified of the delay and time period until completion of the requested teleservice transaction may be achieved.

User notification of mobile station originated teleservice transaction

An improved method is claimed for responding to channel pointers in a wireless communications system, such as a cellular telephone system, operating on a communications spectrum having channel bands. The method includes storing a band search list, receiving a channel to a pointer to a pointed-to control channel, and disregarding the channel pointer if the pointed-to is in a channel band not included on the band search list. The improved method improves system response time and more efficiently utilizes system resources.

Growing community of inventors

Cary, NC, United States of America

David James Hoover