WO2004014036A2 - Procede de pre-traitement d'un message groupe par paquets contenant au moins deux elements, recu par un recepteur - Google Patents

Procede de pre-traitement d'un message groupe par paquets contenant au moins deux elements, recu par un recepteur Download PDF

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Publication number
WO2004014036A2
WO2004014036A2 PCT/EP2003/008262 EP0308262W WO2004014036A2 WO 2004014036 A2 WO2004014036 A2 WO 2004014036A2 EP 0308262 W EP0308262 W EP 0308262W WO 2004014036 A2 WO2004014036 A2 WO 2004014036A2
Authority
WO
WIPO (PCT)
Prior art keywords
receiver
unpacked
syntax
address
addressed
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.)
Ceased
Application number
PCT/EP2003/008262
Other languages
English (en)
Other versions
WO2004014036A3 (fr
Inventor
Jari Sassi
Regina Johannesson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from EP02388047A external-priority patent/EP1387548A1/fr
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Priority to AU2003266955A priority Critical patent/AU2003266955A1/en
Publication of WO2004014036A2 publication Critical patent/WO2004014036A2/fr
Publication of WO2004014036A3 publication Critical patent/WO2004014036A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/22—Parsing or analysis of headers

Definitions

  • This invention relates to wireless receivers for receiving packed or compressed digital messages that are transmitted from a base station.
  • the base station serves a plurality of receivers in its geographical area of coverage called a cell.
  • Messages are paging messages or dedicated messages that are addressed to a particular receiver among a plurality of receivers served by the same transmitter. The receivers thus share the dedicated channel.
  • Each message from the base station is addressed for a particular receiver and is broadcast over the entire cell or a subdivision of the cell, and each active mobile station in the cell will thus receive all messages that are broadcast from the base station including in particular messages addressed to other mobile stations in the cell.
  • Each mobile station must examine at least the address of each received message and determine whether the message is addressed for the mobile station it self or for another receiver or mobile station. Messages addressed for other mobile stations will be ignored or discarded, and only messages addressed for the particular mobile station will be executed.
  • the received message is unpacked element by element, and each unpacked element is checked for syntax match with the expected syntax. If a syntax match is determined, it is checked whether the unpacked element is an address element, and only if the addressed matches with the identity of the receiver, is the rest of the received packet unpacked.
  • the method of the invention can in most cases be determined already at an early stage during unpacking, and without having to unpack each received message completely, whether or not the received message is addressed for the receiver, and if it is determined that the received message cannot possibly be addressed to the receiver, then the received message is ignored without unpacking the rest of the message, whereby processor resources and battery power is saved.
  • traffic mode the transmitting base station will often transmit packed messages to several mobile stations or other receivers in the cell, and each receiver should only process the messages addressed to it.
  • stand-by or sleep mode it is necessary for the mobile receiver to be alert and to react to all messages addressed to the receiver. In any case, messages not addressed to the individual receiver are irrelevant to the receiver and should be ignored.
  • received packed messages are unpacked element by element, each new element that is unpacked, is immediately checked for a possible match with the identity of the receiver, and as soon as a possible mismatch is found, which means that the received message cannot possibly be addressed for the receiver, the message is ignored without further unpacking and processing of the message.
  • Figure 1 shows schematically a base station and mobile stations served by the base station
  • Figure 2 shows schematically possible data structures of received packets
  • Figure 3 shows a flow chart of the unpacking method of the invention.
  • FIG 1 a base station BS and two portable communications devices such as mobile stations MSI and MS2 in the cell served by the base station BS.
  • MSI and MS2 portable communications devices
  • FIG 2 is shown three packets PI, P2 and P3 transmitted by the base station and received by the active mobile stations in the cell served by the base station.
  • Each packet is shown with one or more address elements AE and a message block.
  • the address elements AE can be in a header portion of the packets as in the packet PI or within the packet as in the packets P2 and P3, and there can be more than one address element as in the packet P3.
  • the packets are packed or compressed using eg the CSN.1 or the ASN.1 languages or other suitable language using a grammatical structure. In practice the different parts of the packets will be packed in a more complex way depending on the type of packet.
  • Figure 3 is a flow chart that schematically shows how packed messages received by a mobile station are pre-processed according to the method of the invention. Having been started the mobile station enters a loop (not shown) waiting to receive a message. When a message has been received, a first element of the received message is unpacked according to a proper unpacking algorithm in order to restore the element. After unpacking the element it is checked whether the unpacking was syntactically correct. If not, unpacking of the received packet is discontinued, and the unpacking process enters a ready mode. If the unpacking was syntactically correct, it is checked whether the unpacked element is an address element, and if not, a further element is unpacked.
  • the element is an address element, it is checked whether the address is in accordance with the syntax used, and if not, unpacking of the received packet is discontinued, and the unpacking process enters the ready mode. If the address is in accordance with the syntax used, it is checked whether the address element matches with the identity of the receiver as stored eg in the SIM (Subscriber Identity Module), ie whether the packet is addressed for the receiver, and if not, unpacking of the received packet is discontinued, and the unpacking process enters the ready mode. If the packet is addressed for the receiver, it is checked whether there are more elements in the packet, and of not, the unpacking process enters the ready mode. If there are more elements in the packet, the next element is unpacked etc. In the ready mode the unpacking process is ready to receive a new packet. When a packet that is addressed for the receiver, is unpacked as described here, the receiver processes the message.
  • SIM Subscriber Identity Module
  • the unpacking is discontinued as soon as it has been determined that an unpacked element does not have the correct or expected syntax, or that an unpacked address element indicates that the packet is not addressed for the receiver and thus irrelevant. Received packets that are irrelevant to the receiver are thereby not unpacked, and processor resources can be used for relevant purposes.
  • the method of the invention is not limited to certain address types but can be used for unpacking packed messages with a variety of address types such as BVISI, TLMSI, PTEVISI, TLLI, TFI and TQI, which are used depending on the actual state of communication.
  • address types such as BVISI, TLMSI, PTEVISI, TLLI, TFI and TQI, which are used depending on the actual state of communication.
  • the TQWI Temporary Queue Identifier
  • the addresses are used dynamically, and each mobile station can have several types of addresses that change dynamically over time according to the actual conditions.

Landscapes

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

Abstract

Selon l'invention, un paquet reçu d'éléments groupés en paquets est dégroupé élément à élément. Il est vérifié pour chaque élément dégroupé si le paquet reçu peut être adressé au récepteur. Il est vérifié que l'élément dégroupé est un élément d'adresse. Uniquement si l'adresse correspond à l'identité du récepteur, c.-à-d. s'il est adressé au récepteur et qu'il y a donc correspondance syntaxique, le reste du paquet reçu est dégroupé. Dans des dispositifs de communication mobiles, les ressources de processeur et l'énergie de la batterie sont économisés.
PCT/EP2003/008262 2002-07-30 2003-07-23 Procede de pre-traitement d'un message groupe par paquets contenant au moins deux elements, recu par un recepteur Ceased WO2004014036A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003266955A AU2003266955A1 (en) 2002-07-30 2003-07-23 A method of pre-processing a packed message with at least two elements, received by a receiver

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP02388047A EP1387548A1 (fr) 2002-07-30 2002-07-30 Méthode de pré-traitement de messages en paquets contenant au moins deux éléments
EP02388047.9 2002-07-30
US40024602P 2002-08-01 2002-08-01
US60/400,246 2002-08-01

Publications (2)

Publication Number Publication Date
WO2004014036A2 true WO2004014036A2 (fr) 2004-02-12
WO2004014036A3 WO2004014036A3 (fr) 2004-04-08

Family

ID=31497103

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2003/008262 Ceased WO2004014036A2 (fr) 2002-07-30 2003-07-23 Procede de pre-traitement d'un message groupe par paquets contenant au moins deux elements, recu par un recepteur

Country Status (2)

Country Link
AU (1) AU2003266955A1 (fr)
WO (1) WO2004014036A2 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6005885A (en) * 1995-12-12 1999-12-21 Intermec Ip Corp. Methodology for discontinuous radio reception utilizing embedded frame length words
KR100296049B1 (ko) * 1999-03-19 2001-07-28 윤종용 단문메시지서비스를 통한 디지털 휴대용 단말기의 사용자 정보 송수신장치 및 그 방법
US6608828B1 (en) * 1999-09-15 2003-08-19 Ericsson Inc. Methods and systems for decoding headers that are repeatedly transmitted and received along with data on a radio channel
US6711164B1 (en) * 1999-11-05 2004-03-23 Nokia Corporation Method and apparatus for performing IP-ID regeneration to improve header compression efficiency

Also Published As

Publication number Publication date
AU2003266955A1 (en) 2004-02-23
WO2004014036A3 (fr) 2004-04-08

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