Classifications

• • 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
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04M—TELEPHONIC COMMUNICATION
  • H04M1/00—Substation equipment, e.g. for use by subscribers
  • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
  • H04M1/725—Cordless telephones
  • H04M1/73—Battery saving arrangements
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
  • H04W52/02—Power saving arrangements
  • H04W52/0209—Power saving arrangements in terminal devices
  • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04B—TRANSMISSION
  • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
  • H04B1/06—Receivers
  • H04B1/16—Circuits
  • H04B1/1607—Supply circuits
  • H04B1/1615—Switching on; Switching off, e.g. remotely
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
  • Y02D30/00—Reducing energy consumption in communication networks
  • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

• the power consumption in standby mode in mobile communication terminals depends to a large extent on how long the receiver can be switched off. With conventional mobile radio networks, this time is specified by the system. The longer this time, the lower the energy consumption, but the longer the mean time until an incoming call is switched through (response time). The system reacts more slowly, the lower the energy consumption of the end devices is to be kept in the idle state. This situation results from a time-division multiplex method in which a signaling channel (a so-called paging channel, also referred to as PCH in the GSM standard) is divided into paging sub-channels (so-called paging sub-channels).
• a signaling channel a so-called paging channel, also referred to as PCH in the GSM standard
• PCH so-called paging channel
• Paging information from different paging subchannels is transmitted at different times from the communication network (ie, for example from a base station subsystem).
• Each mobile radio terminal is assigned to a paging subchannel.
• the receiver only has to be switched on in those time intervals in which information from the corresponding paging subchannel is broadcast.
• the invention aims at an improvement here with the aim of further reducing the energy consumption and at the same time keeping the mean time until an incoming call is switched through (response time) as short as possible. This object is achieved by a method for transmitting information between a communication network and a communication terminal according to claim 1 and by a communication terminal according to claim 4.
• the present invention is based on the idea of reducing the data rate instead of the duty cycle of the receiver in the idle state. Since the power consumption of a communication terminal can decrease with the data rate used for information transmission, this measure leads to a reduction in the power consumption during reception. While in the known methods the power consumption during reception is essentially independent of whether the communication terminal is currently in the idle state or not, and consequently only the average power consumption in the idle state due to short
• the invention achieves a reduction in the (instantaneous) power consumption during reception in the idle state.
• the reception times switch-on times of the receiver
• the reception times can therefore be longer in the invention than in the known systems, as a result of which the mean time until incoming calls are switched through or the energy consumption can be reduced.
• a multiplicity of narrow-band channels can be provided, each such channel being assigned to a group of communication terminals for information transmission in the idle state.
• These channels can be separated from one another in the time domain or in the frequency domain or in other ways known to those skilled in the art. Some of these channels or other narrow-band channels can also be used for information transmission from a communication terminal to the communication network.
• FIG. 1 schematically shows an embodiment of the invention in which the paging channel is subdivided into a large number of narrow-band paging subchannels which are used next to one another in time.
• Figure 2 shows a schematic of an embodiment of the
• the paging channel is subdivided into a plurality of narrow-band paging subchannels, some of which are used in succession or side by side.
• FIG. 3 schematically shows a combination of the embodiments of the invention shown in FIGS. 1 and 2.
• FIG. 4 schematically shows a preferred embodiment of the communication terminal according to the invention.
• the invention provides for the use of a narrowband paging channel or a plurality of narrowband paging channels, the bandwidth of which is considerably less than the bandwidth used or required for the actual call transmission.
• a possible implementation is shown schematically in FIG. 1.
• the total bandwidth (PB) available for paging is thus divided into n subbands with a correspondingly low bandwidth.
• a paging subchannel is defined here by a frequency range (PSB) and a time range (PTS).
• PSB frequency range
• PTS time range
• the receiver (the communication terminal) is e.g. In a public transport system whose body has a strong shielding effect or is far from the nearest base station in a rural area and only the transmission of a character string is important (paging, short message service), the sensitivity of reception should have a higher priority than that
• the invention enables a very flexible reaction to such different circumstances in that, depending on the application, a suitable paging subchannel can be assigned to a communication terminal, the properties of which are adapted to these circumstances as far as possible.
• a suitable paging subchannel can be assigned to a communication terminal, the properties of which are adapted to these circumstances as far as possible.
• FIG. 3 the paging channel is composed of different paging subchannels, some of which differ in the size of the time range they occupy. According to the present description, it is clear that paging
• Subchannels also in the size of their frequency range (ie in the bandwidth) can distinguish. This could be achieved, for example, by bundling elementary paging subchannels into broadband paging subchannels.
• the communication terminal can thus optimize its energy consumption in the idle state given the data rate specified by the network and the current reception conditions.
• the communication terminal can make its response to a paging call dependent on the transmission conditions and the type of call (voice, data, SMS).
• the invention enables the paging channel to be divided into subchannels based on the current conditions in the communication network, e.g. in a cell.
• a communication terminal has means for adapting its reception bandwidth to the properties of the paging subchannel assigned to it.
• digital filters are preferably provided, the parameters (i.e. e.g. their filter coefficients) of which can be easily changed when changing to another reception band.
• Such digital filters are e.g. with the help of suitable software tools that run on suitable signal processors.
• the reduction in the bandwidth of the paging subchannels, each of which is assigned to a group of terminals, is accompanied by a reduction in the maximum data rate. This is desirable in view of the reduced power consumption of the end devices.
• To transmit a certain amount of data with a lower data rate is one accordingly longer time required.
• Such structuring can e.g. can be achieved in that a list of all called terminals is selected at the beginning of a transmission duration of a paging subchannel. Only then would further information, if any, be sent out for these affected devices. According to another embodiment of the invention, it is also possible to start each transmission with the subscriber number of the subscriber to be called. In a corresponding
• Communication terminal devices are provided for carrying out a comparison “in real time”; the first time a character does not match, the receiver is switched off and preferably only switched on again for the transmission of the next subscriber number.
• the transmission of subscriber numbers preferably takes place after a fixed time grid.
• the reduction in the data rate can reduce the power consumption and thus the energy consumption. be used.
• Paging subchannel can also be used to reduce the mean time until a call is switched through.
• the reduction in the bandwidth of the paging subchannels can also be used to increase the receiver sensitivity.
• a reduction in the power consumption of the terminal can be achieved with a reduced data rate, for example by reducing the cross currents in the receiving stages or by switching off entire amplifier blocks. If, on the other hand, an increase in receiver sensitivity is desired, this can be done e.g. by increasing the cross currents in the receiving stages or by redundant coding of the data to be transmitted. Any combination of these objectives can be achieved by combining these or equivalent measures.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Signal Processing (AREA)
• Mobile Radio Communication Systems (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (2)

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ID=7823795

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (5)

Citations (2)

• 1998
  • 1998-03-02 WO PCT/DE1998/000607 patent/WO1998042112A2/de not_active Application Discontinuation
  • 1998-03-02 EP EP98916821A patent/EP0968618A2/de not_active Withdrawn
  • 1998-03-02 CN CN98803427A patent/CN1250581A/zh active Pending
  • 1998-03-02 JP JP54000898A patent/JP2001515671A/ja active Pending

Patent Citations (2)

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