Classifications

• • 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
  • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
  • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
• • 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
  • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
  • H04W52/0219—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave where the power saving management affects multiple terminals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04W—WIRELESS COMMUNICATION NETWORKS
  • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
  • H04W88/02—Terminal devices
  • H04W88/022—Selective call receivers
• • 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 present invention relates to an energy saving method in a mobile terminal receiving, from a mobile radiocommunication network, a data message which is formed by N successive blocks among which only M first blocks are occupied by data. useful, N and M being integers, and M being less than N. It also relates to a mobile terminal for implementing the method.
• the invention applies, for example, to a digital cellular radio network, as defined by the GSM (Global System for Mobile communication) Recommendations.
• GSM Global System for Mobile communication
• the transmission on radio channel between mobile terminal and mobile network is organized in successive frames, each having a duration of 120/26 ms and comprising 8 time intervals, or windows, intended to receive "bursts", which can be data bursts, speech bursts, etc.
• Each superframe of 1326 frames is organized according to one of two different patterns which are either a pattern of 51 multiframes-26 per superframe, or a pattern of 26 multiframes-51 per superframe.
• a multiframe-26 has 26 frame time slots, and a multiframe-51 has 51 frame time slots.
• Multi-frames define the logical, not temporal, organization of data in channels.
• hyperframe corresponds to the cycle of frequency hopping laws in frequency hopping technique.
• FIGS. 1A and 1B show two successive multiframes-51 associated to typical format for GSM, which are transmitted from the mobile network to 'mobile terminals.
• Each multiframe-51 represented comprises 51 time intervals, each intended to convey a burst which defines alone or in combination with other bursts, a channel.
• the channels defined in the two multiframes-51 represented are 8 dedicated control channels 8.T1, 8.T2, 8.T3, 8.T4, 8.T5, 8.T6, 8.T7 and 8.T8 (SDCCH for Stand-alone Dedicated Control CHannel in English terminology, and also called TCH / 8), and 8 associated slow control channels 4.SI, 4.S2, 4.S3, 4.S4, 4.S5, 4.S6 , 4.S7 and 4.S8 (SACCH for Slow Associated Control CHannel), 6 time intervals X remaining unoccupied.
• Each dedicated control channel 8.Ti, i comprised between 1 and 8 is defined by a cycle of 8 time intervals, denoted Ti, every 2 multitrames 51, first 4 time intervals Ti of the B.Ti channel belonging to the first multiframe-51 and 4 other time intervals Ti belonging to the second multiframe-51.
• Each associated slow control channel 4.Si, i between 1 and 8, is defined by a cycle of 4 time intervals If all the 2 multiframes-51, belonging either to the first multiframe-51 or to the second multiframe- 51. The role of each of these channels will not be described in more detail and reference may usefully be made to the work "The GSM System for Mobile Communication" produced and published by M. MOULY and MB PAUTET, Edition 1994.
• a data message broadcast channel CBCH, or 4.Ti occupies half of the time intervals Ti of the corresponding dedicated control channel ⁇ .Ti, or four time intervals Ti per pair of multiframes-51.
• These data messages are short messages, for example intended to be displayed on a screen of the mobile radiocommunication terminal.
• FIG. 2 is shown a data message broadcasting channel 4.T8 formed by four successive time intervals T8 in the first multiframe-51 of FIG. 1A.
• each of the bursts B1 to B4 is framed by data from the header and from the end of the burst TB.
• M first blocks convey useful data from the data message
• a first objective of the invention is to remedy the aforementioned drawback by providing an energy saving method in a mobile terminal receiving, from a mobile radiocommunication network, a data message which is formed by N successive blocks among which only M first blocks are occupied by useful data.
• Another objective of the invention is to provide a mobile terminal for the implementation of the method
• an energy saving method in a mobile terminal receiving, from a mobile radiocommunication network, a data message which is formed by N successive blocks among which successive blocks only M first blocks are occupied by useful data, N being a predetermined integer, and M being an integer which is between l and N as a function of said data message, is characterized in that it comprises the steps of: - transmission by the mobile network in said data message, of indication information representative of the number M of useful data blocks in said message, and
• the indication information is conveyed in the first M blocks of useful data, and indicates in each of said M first blocks, the existence or the lack of existence of a first following block useful data, and standby is effective after complete reception of said each of the M blocks, as soon as said indication information indicates the absence of existence of a first next block of useful data.
• the mobile network is a cellular digital network of the G.S.M. type, and the data message is conveyed in a broadcasting subchannel of a dedicated control channel.
• a mobile radiocommunication terminal for implementing the method according to the first variant further comprises a central processing unit, radio transmission and reception means and peripheral means. It is characterized in that the central unit comprises means for reading said indication information indicating the number M of useful data blocks, and means for putting the mobile terminal to sleep after a duration corresponding substantially to the duration of M blocks of useful data, counting from the time of the start of reception of the very first of said M first blocks.
• a mobile radiocommunication terminal for implementing the method according to the second variant further comprises a central processing unit. processing, radio transmission and reception means and peripheral means. It is characterized in that the central unit comprises means for reading said indication information indicating the existence or the absence of existence of a first block following useful data in each of said first blocks, and means for putting on standby the mobile terminal after complete reception of a first block of useful data which includes indication information indicating the lack of existence of a first next block of useful data.
• FIGS. 1A and 1B already commented on, show two respective multiframes, called multiframes-51, transmitted from a mobile network to a mobile terminal in a cellular radiocommunication network with mobiles of the GSM type, and associated with each other to form dedicated control channels;
• the invention provides for using the two free bits b1 and b2 to implement the method of the invention, two variants being provided.
• This indication information is sent by the mobile network in burst bits corresponding to bits b1 and b2 in the block.
• the terminal 1 comprises a central processing unit 10 associated with an activity controller 10a, a radio transmission and reception unit 11 connected to an antenna 1a and peripheral circuits 12 and 13, such as keyboard, SIM card reader, etc.
• the unit 10 and controller 10a cooperate to put the mobile terminal to standby after a duration corresponding substantially to the duration of M useful data blocks, from the moment of the start of reception of the very first of the M blocks.
• the terminal 1 is put on standby after reception of a number of blocks equal to the number M which is indicated by the information constituted by the two bits bl and b2.
• the terminal is put into standby as follows.
• the central processing unit 10 sends a deactivation message ME, through an interface, represented by an arrow in broken lines, to an input of the controller 10a.
• the controller 10a on receipt of the message ME, and, as a function of this message, puts the radio telephone 1 in total or partial standby.
• the mobile radiocommunication terminal for implementing this second variant is substantially identical to the terminal described with reference to FIG. 4 for the first variant. It differs from this by the fact that the central unit 10 reads in each block the bit bl indicating the existence or the lack of existence of a next block of useful data, and puts on standby, in cooperation with the controller 10a, the mobile terminal after complete reception of a block of useful data which includes a bit bl indicating the lack of existence of a next block of useful data.
• the mobile terminal is kept activated and put on standby after complete reception of a block of useful data, respectively depending on whether the indication bit bl indicates the existence and the failure of existence of a next block of useful data .
• this indication information is conveyed by the bits b1 and b2 in the first block of the message.
• this indication information is conveyed by the bits b1 transmitted in the M useful data blocks.

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

Applications Claiming Priority (3)

Publications (1)

Family

ID=9468136

Family Applications (1)

Country Status (7)

Families Citing this family (5)

Family Cites Families (3)

• 1994
  • 1994-10-24 FR FR9412678A patent/FR2726147B1/fr not_active Expired - Fee Related
• 1995
  • 1995-10-23 AU AU38092/95A patent/AU3809295A/en not_active Abandoned
  • 1995-10-23 JP JP8513693A patent/JPH09512407A/ja active Pending
  • 1995-10-23 CA CA002179662A patent/CA2179662A1/fr not_active Abandoned
  • 1995-10-23 EP EP95935999A patent/EP0737407A1/fr not_active Withdrawn
  • 1995-10-23 WO PCT/FR1995/001394 patent/WO1996013134A1/fr not_active Application Discontinuation
• 1996
  • 1996-06-19 FI FI962541A patent/FI962541A/fi not_active Application Discontinuation

Non-Patent Citations (1)

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