GB2253972A - Apparatus and method for paging a remote subscriber - Google Patents
Apparatus and method for paging a remote subscriber Download PDFInfo
- Publication number
- GB2253972A GB2253972A GB9204488A GB9204488A GB2253972A GB 2253972 A GB2253972 A GB 2253972A GB 9204488 A GB9204488 A GB 9204488A GB 9204488 A GB9204488 A GB 9204488A GB 2253972 A GB2253972 A GB 2253972A
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- GB
- United Kingdom
- Prior art keywords
- station
- subscriber unit
- power level
- remote subscriber
- base
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
- H04W68/02—Arrangements for increasing efficiency of notification or paging channel
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
A base-station (100) pages a remotely located portable (110) at a first RF power level on a broadcast channel and, if the portable (110) does not respond, the base-station (100) attempts to page the portable (110) at a second, higher RF power level on a high power paging channel. The high power page includes a switching circuit identification number that, if called by the subscriber using either the portable (110) or a fixed-telephone (130), switches switching circuitry (200) accordingly to establish communication to the originator. <IMAGE>
Description
Apparatus and Method for
Paging a Remote Subscriber
Field of the Invention
This invention relates generally to radiotelephone systems and more specifically to radiotelephone systems which increase power to maintain downlink communication.
Background of the Invention
In radiotelephone systems, maintenance of downlink communication to a portable from a base-station is an important factor. Typically, the portable camps on a cell from which it can reliably decode downlink data and with which it has a high probability of communicating on the uplink. When a portable enters a potentially degrading communication environment (such as conditions caused by entering a building), the chances of maintaining the downlink communication with the portable decrease.
For radiotelephone portables of the personal communication type, the portable is intended to be carried with the subscriber at all times. For these low power systems, a cell has a predetermined radius. If a subscriber enters a building, the loss due to the structure of the building will prevent the portable from decoding the downlink - messages which are transmitted from the basestation typically on a broadcast control channel (BCCH). In this scenario, the portable is completely cut off from the network. If the power of the BCCH were increased in order to maintain downlink communication with portables that enter buildings within radius r, then the range of the BCCH for portables that are not inside a building would increase by some value x.The size of the cell now grows to a radius r+x as far as normal traffic is concerned and downlink communication with in-building portables would be within radius r. This implies that all portables in the cell that enter buildings in the area of the cell between radius r and r+x will lose the downlink. This situation causes a cycle of ever increasing power levels and cell radius.
Thus, a need exists for a radiotelephone system which maintains downlink communication with portables in poor propagation environments while maintaining typical base-station power levels and cell boundaries.
Summary of the Invention
A fixed-site base-station pages a remote subscriber unit and the subscriber unit sends a response signal to the fixed-site base-station upon receipt of the page. The fixedsite base-station provides a paging signal, transmits the paging signal to the remote subscriber unit at a first power level, and transmits the paging signal to the remote subscriber unit at a second power level when the remote subscriber unit does not send a response signal to the fixed-site base-station within a pre-deterinined time period.
Brief Description of the Drawings
FIG. 1 generally depicts a radiotelephone system which may employ the present invention.
FIG. 2A generally illustrates the switching configuration of a switch interface to establish communication through a base-station while FIG. 2B generally illustrates the switching configuration of a switch interface to establish communication through a central office.
FIG. 3 generally depicts a GSM TDMA frame.
FIG. 4 generally illustrates GSM TDMA frames comprising a multiframe.
FIG. 5 depicts the logical channel for a broadcast channel (BCCH) and a control channel (CCCH) combination employed in a GSM multiframe.
FIG. 6 generally depicts three high power paging channels (HPPCH's) replacing three CCCH's in accordance with the invention.
FIG. 7 generally depicts a transmitter hardware in a base-station which may be used to implement the present invention.
FIG. 8 generally illustrates in flow diagram form the steps a radiotelephone system performs to maintain downlink communication in accordance with the invention.
Detailed Description of a Preferred Embodiment
FIG. 1 generally depicts a radiotelephone system in accordance with the invention. In the typical scenario, when communication between the base-station 100 and a subscriber unit or portable 110 carried by a subscriber can be maintained, establishment of the call from an external source is as follows. A call is made by an originator from a telephone 115 within an originating network 116. The call can likewise be from a portable radiotelephone through the switch interface 105 or through other switch interfaces (not shown). Continuing, the call generates a paging signal which is input into the switch interface 105 and subsequently sent to the base-station 100.The basestation 100 transmits the paging signal to the corresponding portable 110 and if the portable 110 is within a specified coverage area, the portable 110 will ring, and the subscriber will complete the call through the basestation 100 and the interface 105 to the originator 115.
When the subscriber carries the portable 110 into a building 125, the propagation of the paging signal is influenced by the structure of the building 125. If the previous scenario described were repeated, there is a high probability that the portable 110 would not receive the paging signal. The portable 110, during normal operation, is constantly listening to a first logical channel or broadcast and control channel (BCCH/CCCH) which supplies the portable 110 with such control information as the cellular network identification, instructions to obtain service, pager request service, etc. When the portable 110 enters the building and can no longer receive the BCCH/CCCH transmission, the portable 110 automatically converts into a paging mode which allows the portable to receive pages on a second logical channel or a high power paging channel (HPPCH).If at this point a paging signal is transmitted by the base-station 100 at a first radio frequency (RF) power level, which is the typical power level for the cell, the portable 110 embedded in the building 125 will not be able to receive the paging signal and-communication cannot be established. At this point, the originating party is provided a choice of options. First, the originating party may leave a recorded message at a recording center (not shown) coupled to the switch interface 105. Second, the originator may enter a telephone number where the originating party can be reached. This is similar to paging systems. Finally, the originator may choose to wait on the line and try to establish communication to the portable 110.
If the originating party chooses to page the portable 110 or stay on the line and attempt to establish communication to the portable 110, the switch interface 105 and base-station 100 enter into a high power paging mode. The high power paging mode, which transmits the paging signal at a second RF power level, allows the portable 110 to continue to receive messages. The messages, however, are on the high power paging channel (HPPCH) and again, are used in areas where poor propagation conditions prevent reception at normal power levels on the BCCH/CCCH.
If the originating party has chosen to page the portable 110, the paging procedure is similar to the typical paging procedure in radiotelephone systems, except that the base-station 100 now transmits the paging signal at a
RF power level greater than typically required for the cell area. This increase in power is to ensure that the portable 110 imbedded in the building can receive the page. To establish communication to the originator, the subscriber reads the phone number from the portable 110 and completes the call with a fixed land-line telephone unit 130 located within the building 125. If however, the originator chooses to stay on the line and attempts to establish communication, the establishment is accomplished in one of two ways. First, the switch interface 105 receives a request from the central office 120 to attempt to establish the call.The switch interface 105 and base-station 100 enter the high power paging mode whereby the basestation 100 transmits a paging signal and a circuit identification value or number to the portable 110 imbedded in the building 125. Transmission of the page is typically repeated if the portable 110 does not respond back to the base-station 100 within a pre-determined time period. Referring to FIG. 2, the circuit identification number, which in the preferred embodiment is a number ranging in length from 7-15 digits, corresponds to one switching circuit 200 out of a series of switching circuits. A microprocessor 205, which in the preferred embodiment is a Motorola 68010, controls the allocation of the circuit identification number and the switch 200. When the portable 110 receives the page, the subscriber has two choices.First, the subscriber can seek a better coverage area with the portable, i.e. position the portable near a window for better reception and send a response signal back to the base-station 100. The base-station 100 in turn sends the response signal back to the switch interface 105 where, upon receipt of the response signal, the switch 200 is held in the position as shown in FIG. 2A thus allowing the subscriber and the originator to communicate. If the subscriber cannot move the portable 110 to a better coverage area, the subscriber has the option to dial the circuit identification number that was received as - a page on the HPPCH from a fixed phone 130 inside the building 125. This number is dialed by the subscriber, the call is routed through the central office 120 and input into the switch interface 105.When the switch interface 105 receives the number, the microprocessor 205 switches the switch 200 into the position shown in FIG. 2B. The call from the telephone 130 inside the building 125 is then sent back from the switch interface 105 to the originator telephone 115. In this scenario, the HPPCH has maintained downlink communication from the base-station 100 to the portable 110 and has allowed for communication to be immediately established.
This method of downlink maintenance and call establishment is suited for any radiotelephone system, but can be incorporated into the preferred embodiment, a time division multiple access (TDMA) radiotelephone system.
The TDMA structure is based on the Groupe Special Mobile (GSM) Pan European Digital Cellular System. FIG. 3 generally depicts a GSM TDMA frame 300 as defined in
GSM recommendations 5.02, Version 3.4.1, January, 1990.
The TDMA frame 300 is comprised of 8 timeslots, with timeslot zero 305 reserved for transmission of the
BCCH/CCCH channel. FIG. 4 depicts a signalling multiframe 400 as defined in GSM recommendation 5.02, Version 3.4.1,
January, 1990. A multiframe 400 is approximately 235.38 milliseconds, and is comprised of 51 TDMA frames 300.
FIG. 5 depicts the logical representation of data for the BCCH/CCCH on the downlink transmission from the base-station 100 to the portable 110. The logical representation is comprised of 51 timeslots wherein broadcast information and control information are sent in blocks of 4 timeslots. The logical channel to physical channel mapping is as follows. At the start of a multiframe 400, timeslot 500 of the logical channel is mapped into times lot zero of TDMA frame number one of the multiframe 400. The next timeslot 502 of the logical channel is mapped into timeslot zero 305 of TDMA frame number two of the same multiframe. This process continues until timeslot 503 of the logical channel is mapped into timeslot zero of TDMA frame number 51 of the multiframe 400.In this way, the entire contents of the logical channel are mapped into one multiframe 400 for downlink transmission from the base-station 100 to the portable 110.
Referring to FIG. 5, one block of 4 timeslots is reserved for transmission of BCCH information and nine blocks of 4 timeslots are reserved for the CCCH. The CCCH, as described in GSM recommendation 5.02, Version 3.4.1,
January, 1990, can either be a paging channel (PCH), a random access channel (RACH), or an access grant channel (AGCH). Out of the three possibilities for the CCCH, capacity is "stolen" from the AGCH for the transmission of HPP messages on an as needed basis as shown in FIG. 6. The advantages of using the AGCH for HPP messages on an as needed basis are as follows. When the portable 110 loses
RF coverage and goes into the HPP mode, it will go to a known frequency to scan for HPP messages, i.e the last known BCCH carrier frequency. In addition, only portables 110 that have made random access attempts to the basestation 100 will be listening on the AGCH channel.These portables 110 will ignore HPP bursts because of the different bit structure used for sending the HPP messages.
In the preferred embodiment, up to three AGCH blocks will be stolen, but more could be used depending on the HPP requirements of the system.
FIG. 7 generally depicts a transmitter hardware in a base-station 100 which may be used to implement the present invention. The hardware is comprised of a microprocessor 705, which in the preferred embodiment is a Motorola 68010, coupled to memory 700. The microprocessor 705 accepts the incoming signal from the switch and retrieves calibration/transmission information from the memory 700. The signal is then sent to the transmitter 710 where it is transmitted in the form of an
RF signal out of an antenna 101.
FIG. 8 generally illustrates in flow diagram form the steps a radiotelephone system performs to maintain downlink communication in accordance with the invention.
The process starts at 800 by providing at 803 switching circuits at the switch interface 105, each having a corresponding circuit identification value. The switch interface 105 then accepts at 806 a paging signal generated by the originating network 116 and couples at 809 the accepted paging signal to the base-station 100 through one switch 200. The base-station 100 then transmits at 812 the paging signal to a remote subscriber unit 110 at a first power level and transmits at 815 the paging signal and the circuit identification value to the remote subscriber unit 110 at a second power level when the remote subscriber unit does not respond to the radiotelephone system within a pre-determined time period. The switch interface 105 then accepts at 818 a response signal including the circuit identification value and couples at 821 the response signal to the paging signal through the switching circuit 200 having the circuit identification value.
Additional, system level RF interference from HPP bursts will not occur. For example, if three AGCH blocks are stolen for HPP messages every multiframe, then only 12 timeslots (3 AGCH blocks * 4 timeslots per block) out of a total of 408 (51 TDMA frames * 8 timeslots per frame) or 2.9% of the timeslots will be transmitted at the higher RF power level. Also, the HPP bursts should not interfere with
BCCH channels in neighboring cells. In cases where local phenomena cause a HPP burst to propagate an abnormal distance, only one burst in the neighboring cell will be interfered with because of the relatively infrequent transmissions of HPP's. If the cells are synchronized, an AGCH burst in a neighboring cell may be destroyed, but the system is designed to ensure the AGCH burst will be transmitted again. Thus, by replacing the AGCH with
HPPCH, downlink communication from the base-station 100 to the portable is maintained without interference within the cell, and in addition, without interference to neighboring cells.
What I claim is:
Claims (10)
- Claims 1. A fixed-site base-station for paging a remote subscriber unit, the subscriber unit sending a response signal to the fixed-site base-station upon receipt of the page, the fixed-site base-station comprising: means for providing a paging signal; means for transmitting said paging signal to the remote subscriber unit at a first power level and transmitting said paging signal to the remote subscriber unit at a second power level when the remote subscriber unit does not send a response signal to the fixed-site basestation within a pre-determined time period.
- 2. The fixed-site base-station of claim 1 wherein said second power level is greater than said first power level.
- 3. A fixed-site base-station for paging a remote subscriber unit in a time-division multiple access (TDMA) radiotelephone system, the subscriber unit sending a response signal to the fixed-site base-station during at least one TDMA timeslot upon receipt of the page, the fixed-site base-station comprising: means for providing a paging signal; means for transmitting said paging signal to the remote subscriber unit at a first power level during at least a first TDMA timeslot and transmitting said paging signal to the remote subscriber unit at a second power level during at least a second TDMA timeslot when the remote subscriber unit does not send a response signal to the fixed-site base-station within a pre-determined time period.
- 4. The fixed-site base-station of claim 3 wherein said second power level is greater than said first power level.
- 5. The fixed-site base-station of claim 3 wherein said means for transmitting further comprises means for transmitting at a first power level on a first logical channel and transmitting at a second power level on a second logical channel.
- 6. A time-division multiple access (TDMA) radiotelephone system for establishing communication to a remote subscriber unit, the TDMA radiotelephone system incorporating a base-station to page the remote subscriber unit during at least one of a plurality of TDMA timeslots, and an interface to interface the base-station to an originating telephone system, the TDMA radiotelephone system comprising:: means, at the interface, for providing a plurality of switching circuits each having a corresponding circuit identification value; means, at the interface, for accepting at least one paging signal generated by the originating telephone system; means, at the interface, for coupling said accepted paging signal to the base-station through at least one of said switching circuits; means, at the base-station, for transmitting said paging signal to the remote subscriber unit at a first power level during at least one TDMA timeslot and transmitting said paging signal, including a circuit identification value, to the remote subscriber unit at a second power level during at least one TDMA timeslot when the remote subscriber unit does not respond to the TDMA radiotelephone system within a pre-determined time period;; means, at the interface, for accepting a response signal, including said circuit identification value, provided responsive to said remote subscriber unit's receipt of said paging signal including said circuit identification value; and means, at the interface, for coupling said response signal to said paging signal through said one switching circuit having said corresponding circuit identification value.
- 7. The TDMA radiotelephone system of claim 6 wherein said second power level is greater than said first power level.
- 8. The TDMA radiotelephone system of claim 6 wherein said response signal including said circuit identification value is provided from the remote subscriber unit or from a fixed land-line telephone unit.
- 9. The TDMA radiotelephone system of claim 6 wherein said means for transmitting further comprises means for transmitting at a first power level on a first logical channel and transmitting at a second power level on a second logical channel.
- 10. A method of establishing communication to a remote subscriber unit in a radiotelephone system, the radiotelephone system incorporating a base-station to page the remote subscriber unit and an interface to couple the base-station to an originating telephone system, the method comprising the steps of:: providing, at the interface, a plurality of switching circuits each having a corresponding circuit identification value; accepting, at the interface, at least one paging signal generated by the originating telephone system; coupling, at the interface, said accepted paging signal to the base-station through at least one of said switching circuits; transmitting, at the base-station, said paging signal to the remote subscriber unit at a first power level and transmitting said paging signal, including a circuit identification value, to the remote subscriber unit at a second power level when the remote subscriber unit does not respond to the radiotelephone system within a predetermined time period; ; accepting, at the interface, a response signal, including said circuit identification value, provided in response to said remote subscriber unit's receipt of said paging signal including said circuit identification value; and coupling, at the interface, said response signal to said paging signal through said one switching circuit having said corresponding circuit identification value.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US66351091A | 1991-03-04 | 1991-03-04 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9204488D0 GB9204488D0 (en) | 1992-04-15 |
| GB2253972A true GB2253972A (en) | 1992-09-23 |
| GB2253972B GB2253972B (en) | 1995-02-15 |
Family
ID=24662122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9204488A Expired - Fee Related GB2253972B (en) | 1991-03-04 | 1992-03-02 | Apparatus and method for paging a remote subscriber |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2253972B (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363426A (en) * | 1992-07-06 | 1994-11-08 | Motorola, Inc. | Extended range paging for a radio frequency communication system |
| WO1996008941A2 (en) * | 1994-09-14 | 1996-03-21 | Ericsson Inc. | Efficient paging system |
| WO1997042787A2 (en) * | 1996-05-07 | 1997-11-13 | Ericsson Inc. | Apparatus and method for transmitting and receiving a signaling message in a communication system |
| WO1998013954A1 (en) * | 1996-09-24 | 1998-04-02 | Ericsson Inc. | Mobile station communication network |
| WO1998021912A2 (en) * | 1996-11-15 | 1998-05-22 | Ericsson, Inc. | Method for increasing control channel capacity in a communication system |
| WO1998023046A2 (en) * | 1996-11-20 | 1998-05-28 | International Mobile Satellite Organization | High margin notification method and apparatus |
| WO1998031165A2 (en) * | 1997-01-07 | 1998-07-16 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| EP0696150A3 (en) * | 1994-07-25 | 1998-07-29 | Claudio Scardapane | Call signalling a non-reachable radio telephone |
| EP0859528A2 (en) * | 1997-02-15 | 1998-08-19 | Rohde & Schwarz GmbH & Co. KG | Radiopaging system for mobile receiver |
| WO1999014961A1 (en) * | 1997-09-16 | 1999-03-25 | Ericsson Inc. | System and method for forwarding calling party information |
| WO1999030525A1 (en) * | 1997-12-11 | 1999-06-17 | Ericsson Inc. | System, method and apparatus for handling high-power notification messages |
| US5915216A (en) * | 1995-06-02 | 1999-06-22 | Dsc Communications Corporation | Apparatus and method of transmitting and receiving information in a wireless telecommunications system |
| WO1999067898A1 (en) * | 1998-06-23 | 1999-12-29 | Siemens Aktiengesellschaft | Method for regulating power of point-to-multipoint connections in wireless telecommunications systems during an uncoordinated unlicensed system operation |
| WO2000008887A1 (en) * | 1998-08-04 | 2000-02-17 | Ericsson, Inc. | Method of processing and transmitting incoming call pages including information allowing a determination of the time allowed for response and related user terminals and communication systems |
| WO2000042737A1 (en) * | 1999-01-13 | 2000-07-20 | Koninklijke Philips Electronics N.V. | A wireless local area network(lan) and a method of operating the lan |
| US6223047B1 (en) | 1998-08-26 | 2001-04-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Extended sleep mode method and apparatus |
| WO2013156461A1 (en) * | 2012-04-19 | 2013-10-24 | Telefonaktiebolaget L M Ericsson (Publ) | Energy-efficient detection of network connection requests |
| US20140004899A1 (en) * | 2012-06-29 | 2014-01-02 | Qualcomm Incorporated | System and method for controlling paging delay |
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| GB2227143A (en) * | 1988-11-25 | 1990-07-18 | Indep Broadcasting Authority | Mobile radio-telephone system with mobile units and base stations |
Cited By (45)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5363426A (en) * | 1992-07-06 | 1994-11-08 | Motorola, Inc. | Extended range paging for a radio frequency communication system |
| EP0696150A3 (en) * | 1994-07-25 | 1998-07-29 | Claudio Scardapane | Call signalling a non-reachable radio telephone |
| WO1996008941A2 (en) * | 1994-09-14 | 1996-03-21 | Ericsson Inc. | Efficient paging system |
| WO1996008941A3 (en) * | 1994-09-14 | 1996-06-13 | Ericsson Ge Mobile Inc | Efficient paging system |
| US5594776A (en) * | 1994-09-14 | 1997-01-14 | Ericsson Inc. | Efficient paging system |
| US5826173A (en) * | 1994-09-14 | 1998-10-20 | Ericsson Inc. | Efficient paging system with sleep mode duration determined by the guaranteed number of repeats |
| US5915216A (en) * | 1995-06-02 | 1999-06-22 | Dsc Communications Corporation | Apparatus and method of transmitting and receiving information in a wireless telecommunications system |
| WO1997042787A2 (en) * | 1996-05-07 | 1997-11-13 | Ericsson Inc. | Apparatus and method for transmitting and receiving a signaling message in a communication system |
| US5930718A (en) * | 1996-05-07 | 1999-07-27 | Ericsson Inc. | Apparatus and method for transmitting and receiving a signaling message in a communication system |
| WO1997042787A3 (en) * | 1996-05-07 | 1998-02-26 | Ericsson Ge Mobile Inc | Apparatus and method for transmitting and receiving a signaling message in a communication system |
| GB2333425B (en) * | 1996-09-24 | 2001-06-06 | Ericsson Inc | Mobile station communication network |
| WO1998013954A1 (en) * | 1996-09-24 | 1998-04-02 | Ericsson Inc. | Mobile station communication network |
| GB2333425A (en) * | 1996-09-24 | 1999-07-21 | Ericsson Ge Mobile Inc | Mobile station communication network |
| US5884170A (en) * | 1996-09-24 | 1999-03-16 | Ericsson, Inc. | Subscriber feature controlled high penetration messaging |
| WO1998021912A2 (en) * | 1996-11-15 | 1998-05-22 | Ericsson, Inc. | Method for increasing control channel capacity in a communication system |
| US5933418A (en) * | 1996-11-15 | 1999-08-03 | Ericsson Inc. | Method for increasing control channel capacity in a communication system |
| WO1998021912A3 (en) * | 1996-11-15 | 1998-08-27 | Ericsson Ge Mobile Inc | Method for increasing control channel capacity in a communication system |
| EP1191807A2 (en) * | 1996-11-20 | 2002-03-27 | Inmarsat Ltd. | High margin notification method and apparatus |
| US6954642B2 (en) | 1996-11-20 | 2005-10-11 | Inmarsat, Ltd. | High margin notification method and apparatus |
| WO1998023046A3 (en) * | 1996-11-20 | 1998-10-08 | Int Mobile Satellite Org | High margin notification method and apparatus |
| US6763240B1 (en) | 1996-11-20 | 2004-07-13 | Inmarsat Ltd. | High margin notification method and apparatus |
| EP1191807A3 (en) * | 1996-11-20 | 2004-05-12 | Inmarsat Ltd. | High margin notification method and apparatus |
| WO1998023046A2 (en) * | 1996-11-20 | 1998-05-28 | International Mobile Satellite Organization | High margin notification method and apparatus |
| GB2319696B (en) * | 1996-11-20 | 2001-08-01 | Internat Mobile Satellite Orga | Communication method and apparatus |
| AU731762B2 (en) * | 1997-01-07 | 2001-04-05 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| WO1998031165A3 (en) * | 1997-01-07 | 1998-09-17 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| US6434393B1 (en) | 1997-01-07 | 2002-08-13 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| WO1998031165A2 (en) * | 1997-01-07 | 1998-07-16 | Nokia Telecommunications Oy | Medium penetration call announcement in telecommunications system |
| EP0859528A3 (en) * | 1997-02-15 | 2000-01-19 | Rohde & Schwarz GmbH & Co. KG | Radiopaging system for mobile receiver |
| EP0859528A2 (en) * | 1997-02-15 | 1998-08-19 | Rohde & Schwarz GmbH & Co. KG | Radiopaging system for mobile receiver |
| WO1999014961A1 (en) * | 1997-09-16 | 1999-03-25 | Ericsson Inc. | System and method for forwarding calling party information |
| US6112090A (en) * | 1997-09-16 | 2000-08-29 | Ericsson Inc. | System and method for forwarding calling party information |
| WO1999030525A1 (en) * | 1997-12-11 | 1999-06-17 | Ericsson Inc. | System, method and apparatus for handling high-power notification messages |
| US6088589A (en) * | 1997-12-11 | 2000-07-11 | Ericsson Inc. | System, method and apparatus for handling high-power notification messages |
| WO1999067898A1 (en) * | 1998-06-23 | 1999-12-29 | Siemens Aktiengesellschaft | Method for regulating power of point-to-multipoint connections in wireless telecommunications systems during an uncoordinated unlicensed system operation |
| AU748463B2 (en) * | 1998-06-23 | 2002-06-06 | Siemens Aktiengesellschaft | Method for regulating power of point-to-multipoint connections in wireless telecommunications systems during an uncoordinated unlicensed system operation |
| AU753642B2 (en) * | 1998-08-04 | 2002-10-24 | Ericsson Inc. | Method of processing and transmitting incoming call pages including information allowing a determination of the time allowed for response and related user terminals and communication systems |
| US6374114B1 (en) | 1998-08-04 | 2002-04-16 | Ericsson Inc. | Methods of processing and transmitting incoming call pages including information allowing a determination of the time allowed for response and related user terminals and communications systems |
| WO2000008887A1 (en) * | 1998-08-04 | 2000-02-17 | Ericsson, Inc. | Method of processing and transmitting incoming call pages including information allowing a determination of the time allowed for response and related user terminals and communication systems |
| US6223047B1 (en) | 1998-08-26 | 2001-04-24 | Telefonaktiebolaget Lm Ericsson (Publ) | Extended sleep mode method and apparatus |
| WO2000042737A1 (en) * | 1999-01-13 | 2000-07-20 | Koninklijke Philips Electronics N.V. | A wireless local area network(lan) and a method of operating the lan |
| WO2013156461A1 (en) * | 2012-04-19 | 2013-10-24 | Telefonaktiebolaget L M Ericsson (Publ) | Energy-efficient detection of network connection requests |
| US8909267B2 (en) | 2012-04-19 | 2014-12-09 | Telefonaktiebolaget L M Ericsson (Publ) | Energy-efficient detection of network connection requests |
| US20140004899A1 (en) * | 2012-06-29 | 2014-01-02 | Qualcomm Incorporated | System and method for controlling paging delay |
| US9173190B2 (en) * | 2012-06-29 | 2015-10-27 | Qualcomm Incorporated | System and method for controlling paging delay |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9204488D0 (en) | 1992-04-15 |
| GB2253972B (en) | 1995-02-15 |
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| Date | Code | Title | Description |
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| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020302 |