WO2004032541A1 - Procédé et dispositif de gestion d'établissement de liaisons descendantes dans un réseau de communications à commutation de paquets - Google Patents
Procédé et dispositif de gestion d'établissement de liaisons descendantes dans un réseau de communications à commutation de paquets Download PDFInfo
- Publication number
- WO2004032541A1 WO2004032541A1 PCT/FR2003/002829 FR0302829W WO2004032541A1 WO 2004032541 A1 WO2004032541 A1 WO 2004032541A1 FR 0302829 W FR0302829 W FR 0302829W WO 2004032541 A1 WO2004032541 A1 WO 2004032541A1
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- WO
- WIPO (PCT)
- Prior art keywords
- request
- mobile station
- bss
- network
- access
- Prior art date
Links
- 238000004891 communication Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 8
- 230000001174 ascending effect Effects 0.000 claims description 29
- 238000007726 management method Methods 0.000 description 13
- 210000004027 cell Anatomy 0.000 description 11
- 230000001413 cellular effect Effects 0.000 description 6
- 239000000284 extract Substances 0.000 description 5
- 102100034243 Solute carrier family 12 member 2 Human genes 0.000 description 3
- 238000013468 resource allocation Methods 0.000 description 2
- 101150080339 BTS1 gene Proteins 0.000 description 1
- 210000003771 C cell Anatomy 0.000 description 1
- 108091006621 SLC12A1 Proteins 0.000 description 1
- 108091006620 SLC12A2 Proteins 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
Definitions
- the invention relates to the field of cellular packet switched communications networks and in particular the downlink data transfer (or “downlink”) within such networks.
- Cellular networks such as those of the GPRS type, generally comprise a radio access network, also called BSS (for "Base Station System”), responsible, in particular, for managing the allocation of resources or logical channels (such as radio link channels) for establishing links with mobile stations, such as mobile phones.
- BSS Base Station System
- two types of links (or access) can be established: one downlink (or “downlink”), from the BSS to the mobile station, and the other ascendant (or “uplink”) from the mobile station to the BSS.
- the mobile station When the mobile station is responsible for establishing the link (or access), it must make a request for ascending access to the BSS. " When the BSS is responsible for establishing the link (or access), it automatically allocates" downlink "resources to the mobile station.
- connection establishment procedures following upward or downward access requests, generally do not pose any difficulty, under normal operating conditions.
- the mobile station can receive from the BSS two different sets of instructions (or “ assignments ”) which designate two links associated with resources which may be incompatible and therefore prevent data exchange.
- a first set of instructions is in fact transmitted by the BSS with its request for downlink access, while a second set of instructions is transmitted by the BSS after having received its request for ascending access from the mobile station.
- the BSS must then implement complex procedures to resolve the situation and make available unnecessarily allocated resources.
- the invention therefore aims to remedy this drawback.
- a radio access network or BSS
- a packet-switched communications network such as for example those of the GPRS type, and mobile stations.
- downlink data transfer is understood here to mean the establishment of a two-way link (downlink and upward) on the initiative of the radio access network. Consequently, “upward data transfer” is understood to mean the establishment of a two-way link (upward and downward) at the initiative of a mobile station.
- This method is characterized by the fact that it consists in transmitting to a mobile station using the radio access network (or BSS), in the presence of a data transfer request descending to this mobile station, a request connection establishment, such as a paging request, and reception by the radio access network of a response to this request, such as a paging response, transmitted by the mobile station, to be established , still using the radio access network, a downlink access (or link) by means, for example, of a “downlink assignment”, so as to allow data transmission to this mobile station.
- a request connection establishment such as a paging request
- reception by the radio access network of a response to this request such as a paging response, transmitted by the mobile station, to be established , still using the radio access network
- a downlink access (or link) by means, for example, of a “downlink assignment”, so as to allow data transmission to this mobile station.
- the request for connection establishment comprises commands requesting from the mobile station that it addresses to the radio access network a request for upward access (or link) (such as "uplink access"), and secondly, when we receives this request, network resources are allocated, for example by means of an uplink assignment, to establish the uplink access (or link) and allow the mobile station to transmit on this uplink access its response to the request connection establishment.
- the uplink access request generated by a mobile station, allows the radio access network to locate this mobile station.
- the radio access network Once in possession of the elements characterizing the position of the mobile station (such as the cell identifier and the "timing advance value"), and a reference identifier (such as a "random reference” provided by the mobile station in its request for ascending access) the radio access network has the information necessary to establish ascending access.
- the elements characterizing the position of the mobile station such as the cell identifier and the "timing advance value”
- a reference identifier such as a "random reference” provided by the mobile station in its request for ascending access
- the response for example a “paging response” to include a communication identifier specific to the mobile station, such as its TLLI, known to the communications network. Once extracted, this communication identifier then allows the radio access network to have the information necessary to establish the downlink access (or link).
- the request for connection establishment is preferably generated by the radio access network or by a service server, such as an SGSN, of the communications network, coupled to the radio access network.
- the invention also provides a device for managing downlink data transfers between a radio access network of a packet switched communications network and mobile stations.
- This device is characterized by the fact that it comprises management means capable, when they receive a request for transfer of data descending to a mobile station, to order the transmission to this mobile station, by means of the access network.
- radio of a connection establishment request, then the establishment of a downlink access (or link) consecutive to the reception of a response to this request, transmitted by the mobile station.
- the management means are arranged to order the radio access network to generate a connection establishment request requesting the mobile station which it addresses to the network of 'radio access an ascending access (or link) request.
- This request for ascending access is in fact intended to allow the radio access network to allocate network resources to establish the ascending access (or link) which in turn allows the mobile station to transmit its response to the connection establishment request.
- the invention further provides radio access network equipment, such as a network node (or controller) (also called BSC for "Base Station Controller”), or else a control unit coupled to one or more nodes. (or controllers) and responsible for managing packet transfers, equipped with a management device of the type presented above.
- a network node also called BSC for "Base Station Controller”
- BSC Base Station Controller
- this equipment is capable of deducing from the upward access request (or link) generated by a mobile station, the position of this mobile station.
- the equipment Once in possession of the elements characterizing the position of the mobile station (such as the cell identifier and the "timing advance value"), and a reference identifier (such as a "random reference" provided by the mobile station in its request for ascending access) the equipment has the information necessary to establish ascending access.
- this equipment is capable, when the response includes a communication identifier of the mobile station
- the communication identifier in order to establish the downlink access (or link).
- the invention also provides a radio access network, such as a BSS, comprising at least one radio access network equipment of the type presented above.
- a radio access network such as a BSS
- a radio access network comprising at least one radio access network equipment of the type presented above.
- the invention relates to a device and a method for managing downlink data transfers (or "downlinks") between a cellular packet-switched communications network, such as for example those of GPRS type, and mobile stations, such as users mobile phones.
- a cellular packet-switched communications network such as for example those of GPRS type
- mobile stations such as users mobile phones.
- a cellular network of the GPRS type can, in a very schematic manner but nevertheless sufficient for the understanding of the invention, be summarized in a core network (or "Core Network” (CN)) coupled , on the one hand, to one or more other public and / or private networks (the connection to these other networks is shown in FIG. 1 by the arrow F in two directions), and on the other hand, to a network of radio or BSS access (for "Base Station System").
- CN Core Network
- the core network CN generally comprises a first service server, called SGSN (for “Service GPRS Serving Node”) and responsible for the transfers of upward and downward data packets between the BSS and the mobile stations MS, and a second service server called GGSN (for “Gateway GPRS Serving Node”), coupled to SGSN and ensuring the role of logical interface between the GPRS network and other public and / or private networks.
- SGSN for “Service GPRS Serving Node”
- GGSN for “Gateway GPRS Serving Node”
- the radio access network or BSS generally comprises, on the one hand, several nodes or radio network controllers, also called BSCs (for "Base Station Controllers”) and coupled to the CN core network, via an interface, and on the other hand, several transmitting / receiving base stations, also called BTSs (for "Base Transceiver Stations”), each associated with one or more C cells each covering a radio zone, and coupled alone or by group of at least two to one of the BSCs, via a logical interface.
- BSCs for "Base Station Controllers”
- BTSs Base Transceiver Stations
- each BTSj here controls a cell Cj defining a geographic area (assimilated below to the corresponding cell Cj).
- the BTSs could control several cells, and a geographic area could be defined by several cells or portions of cells.
- the management device D because of its function, is intended to be installed in the radio access network BSS.
- the device D is preferably installed in each network controller BSCi of the BSS.
- it could be installed in other equipment of the BSS radio access network, and in particular in a control unit responsible for managing packet transfers and coupled to one or more nodes (or controllers) in order to manage transfers in parallel. downlink data controlled by this or these network controllers.
- the device D comprises a management module M capable of detecting, among the data received by the BSC, in which it is installed, each request for downward data transfer (or “downlink”) designating a mobile telephone. MS.
- a management module M capable of detecting, among the data received by the BSC, in which it is installed, each request for downward data transfer (or “downlink”) designating a mobile telephone. MS.
- MS When it detects such a downward transfer request to a mobile telephone MS-k, it orders the transmission to this mobile station, via the BSS, of a connection establishment request, preferably in the form of what a person skilled in the art calls a "paging request".
- the device D orders the transmission of a connection establishment request to a mobile telephone MS-k, when the latter is placed in the inactive mode or PIM (for “Packet Idle Mode”) and that its GMM state (for “GPRS Mobility Management”) is said to be “ready” or (“ready”).
- PIM Packet Idle Mode
- GMM state for “GPRS Mobility Management”
- the management module M orders the BSCi in which it is implanted to generate the request. This is then transmitted to the mobile phone MS-k, on the common control channel (which is possibly the “Master PDCH” channel), via the BTSj controlling the cell Cj in which said mobile phone MS- is located. k.
- the common control channel which is possibly the “Master PDCH” channel
- Downlink designates a mobile telephone MS-k placed in the inactive mode and in the GMM state called “waiting” (or “stand-by”), the SGSN service server of the core network CN automatically generates the connection establishment request for the MS-k mobile phone. This is then transmitted to the relevant BSCi, then to the mobile phone MS-k, on the common control channel (possibly the “Master PDCH”), via the BTSj controlling the cell Cj in which the mobile phone is located. MS-k.
- the common control channel possibly the “Master PDCH”
- the connection establishment request preferably comprises commands (or instructions) requesting from the mobile telephone MS-k that it address to the radio access network BSS a request for uplink access (or link). , on the channel dedicated specifically to access requests.
- This uplink access request includes in particular a reference identifier (such as the “random reference”) provided by the MS-k mobile telephone and which allows it, when integrated into a descending message from of the BSS, to understand that it is intended for him.
- this access request is likely to allow the BSCi concerned to determine the position of the mobile telephone MS-k which is the author thereof, and therefore to allocate network resources to establish access ( or link) ascending with the mobile MS-k.
- the BSCi concerned when the BSCi concerned receives the uplink access request from the MS-k mobile phone, it extracts the reference identifier from it and determines the elements that characterize the position of the mobile phone (such as the identifier of his cell and the "timing advance value"). Then, it determines a first set of instructions defining the ascending resources allocated to the requested ascending access. It then sends to the mobile phone MS-k, on the common control channel (possibly the “Master PDCH”), a first message (or “uplink assignment”) comprising the first set of instructions and the reference identifier extracted from the request for ascending access.
- the common control channel possibly the “Master PDCH”
- the MS-k mobile phone When the MS-k mobile phone receives this first message (uplink assignment), it recognizes the reference identifier that it had previously provided and understands that it is the recipient of said message. It then extracts from this message the information which will allow it to immediately configure its transmission module on the ascending channel assigned (or assigned) by the BSCi, and therefore to respond to the request (or paging request) previously received.
- the mobile telephone MS-k therefore generates a response, preferably of the “paging response” type, comprising a communication identifier known to the radio access network BSS, and in particular to the BSCi.
- the communication identifier is the TLLI which has been assigned to the mobile telephone MS-k by the SGSN, and which is associated with the routing area (or "routing area") in which it is located.
- the MS-k on the ascending channel assigned to it, it extracts the communication identifier (TLLI), which allows it to have the information necessary to establish the downlink access (or link) with the mobile phone MS-k.
- the BSCi determines a second set of instructions defining the downlink resources allocated to the downlink access which will allow it to transfer to the mobile telephone MS-k the data received from the network equipment. Then, it sends to the mobile telephone MS-k, preferably on the channel assigned in the upward direction, a second message (or “downlink assignment”) comprising the second set of instructions.
- channel assigned in the upward direction is understood here to mean the channel allowing, on the one hand, the mobile station to address data to the BSS, and on the other hand, the BSS to address service information or signaling at the mobile station.
- the MS-k mobile phone Upon receipt of this second message (downlink assignment), the MS-k mobile phone has information that will allow it to immediately configure its reception module on the downlink channels allocated by the BSCi, and therefore to receive the data awaiting transfer.
- the BSCi transmits to the mobile phone MS-k, on one of the allocated channels at the downlink, the data awaiting transfer.
- the network can now exchange data bidirectionally with the MS-k mobile phone.
- the management module M of the device D according to the invention can be produced in the form of software module (s) ("software”). However, it can also be produced, at least in part, in the form of electronic circuits ("hardware”), or even in the form of combinations of software modules and electronic circuits.
- FIG. 2 summarize the main steps of a downlink data transfer method (or “downlink”) according to the invention, which can be implemented, for example, using the management device. D described above.
- a piece of equipment of a communications network wishes to transmit data to a (other) mobile telephone MS-k of the GPRS network, present in a cell Cj controlled by a base station (BTS) managed by one of the BSCs of the BSS access network of the GPRS network.
- BTS base station
- the mobile telephone MS-k, recipient of the “downlink” data is placed in the inactive mode and in the GMM ready state. The data (top-down) to be transferred to the mobile phone
- MS-k reaches the CN core network, and more precisely its GGSN, which then sends them to the SGSN.
- the SGSN then transmits the data to the relevant BSCi of the BSS (arrow F1).
- the device management D Upon receipt of this data, the device management D detects this downlink data and orders the BSCi to transmit to the mobile telephone MS-k a paging request. This order is executed by the BSCi (arrow F2).
- the SGSN When the MS-k mobile phone is placed in the inactive mode and in the GMM standby state, the SGSN automatically generates the paging request, then it address to the BSCi so that it can transmit it to the MS-k mobile phone.
- the MS-k mobile telephone On receipt of this connection establishment request, the MS-k mobile telephone sends the BSS a request for uplink access, including its reference identifier (arrow F3). Then, on receipt of the ascending access request, the BSCi extracts the reference identifier, defines the ascending resources to be allocated to the requested ascending access (or link), and addresses to the mobile telephone MS-k, a first message (or uplink assignment) defining said bottom-up resources and including its reference identifier (arrow F4).
- the MS-k mobile phone On receipt of this first message (uplink assignment), the MS-k mobile phone recognizes its reference identifier, configures its transmission module on the ascending channel allocated by the BSCi, and sends a response (paging response) to the BSCi.
- connection establishment request previously received, comprising a communication identifier (TLLI) (arrow F5).
- the BSCi Upon receipt of the response, the BSCi extracts the communication identifier (TLLI), determines the downlink resources to be allocated to the downlink access (or link), and transmits a second message (or downlink assignment) to the MS-k mobile phone. defining said bottom-up resources (arrow F6).
- TLI communication identifier
- the BSCi Upon receipt of the response, the BSCi extracts the communication identifier (TLLI), determines the downlink resources to be allocated to the downlink access (or link), and transmits a second message (or downlink assignment) to the MS-k mobile phone. defining said bottom-up resources (arrow F6).
- the MS-k mobile telephone Upon receipt of this second message (downlink assignment), the MS-k mobile telephone configures its reception module on the downlink channels allocated by the BSCi. With downstream and upward accesses (or links) established, the network and the MS-k mobile telephone can exchange data bidirectionally. The BSCi can therefore transmit the data awaiting transfer to the mobile telephone MS-k (arrows F7). Thanks to the invention, conflicts of downward resource allocation which could arise in the networks of the prior art are avoided, in particular in the event of a crossing of downlink and upward access requests. This saves, on the one hand, the radio resources allocated during the crossing, and on the other hand, certain computing resources (or CPU) used by the radio resource allocation algorithm.
- the invention makes it possible to significantly simplify the procedure for finding a mobile station in the event of loss of contact, since instead of trying to allocate downlink resources the radio access network requests the mobile station to self-identify.
- the invention makes it possible to simplify the implementation of the GPRS protocol, insofar as the number of specific cases is notably reduced.
- the invention is not limited to the embodiments of device, radio access network equipment and method described above, only by way of example, but it encompasses all the variants that the man of art within the scope of the claims below.
- a management device has been described installed in a network controller for managing downlink data transfers.
- it could be installed in other equipment of the radio access network, such as for example a control unit responsible for managing packet transfers and coupled to one or more nodes (or controllers) so as to manage the transfers in parallel.
- an implementation of the devices and methods according to the invention has been described in a cellular packet-switched communications network, of the GPRS type.
- the invention is not limited to this single type of network. It can indeed also apply to new types of cellular networks in which the terminal equipment is mobile.
- the terminal equipment can lose contact with the control equipment and contact is re-established either on the initiative of the terminal equipment, or on the initiative of the equipment controlling packet transfer.
- the device according to the invention makes it possible to send a message (or request) intended for the terminal equipment and asking it to resume contact within a limited perimeter. by self-identifying.
- the invention can also be applied to packet-switched communication networks, in which the terminal equipment cannot establish permanent contact, for example for a question of limited energy consumption or because it must be in contact with several control systems and that he uses only one means of communication at a given time. In this case, the network takes over from the terminal equipment by sending it requests intended to ask it to resume contact by self-identifying itself.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03775447A EP1550328A1 (fr) | 2002-10-03 | 2003-09-26 | Procede et dispositif de gestion d'etablissement de liaisons descendantes dans un reseau de communications de paquets |
US10/529,913 US20050213578A1 (en) | 2002-10-03 | 2003-09-26 | Method and device for managing downlink setup in a packet-switched communications network |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/12243 | 2002-10-03 | ||
FR0212243A FR2845557B1 (fr) | 2002-10-03 | 2002-10-03 | Procede et dispositif de gestion d'etablissement de liaisons descendantes dans un reseau de communications a commutation de paquets |
Publications (1)
Publication Number | Publication Date |
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WO2004032541A1 true WO2004032541A1 (fr) | 2004-04-15 |
Family
ID=32011360
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/002829 WO2004032541A1 (fr) | 2002-10-03 | 2003-09-26 | Procédé et dispositif de gestion d'établissement de liaisons descendantes dans un réseau de communications à commutation de paquets |
Country Status (5)
Country | Link |
---|---|
US (1) | US20050213578A1 (fr) |
EP (1) | EP1550328A1 (fr) |
CN (1) | CN1695393A (fr) |
FR (1) | FR2845557B1 (fr) |
WO (1) | WO2004032541A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2016157822A1 (fr) * | 2015-03-31 | 2016-10-06 | 日本電気株式会社 | Dispositif et procédé de commande, système de communication et support d'enregistrement |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO1999017579A2 (fr) * | 1997-09-30 | 1999-04-08 | Nokia Networks Oy | Radiorecherche d'un abonne mobile visant a etablir une connexion commutee par paquets |
WO2001028168A1 (fr) * | 1999-10-08 | 2001-04-19 | Microsoft Corporation | Transfert de donnees en paquets depuis un serveur de reseau vers une station mobile via un reseau de communication radio numerique |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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EP0907272A1 (fr) * | 1997-09-25 | 1999-04-07 | Alcatel | Système avec mécanisme de déclenchement automatique d'échanges de données entre un terminal et des moyens d'accès via un réseau téléphonique |
US6230004B1 (en) * | 1997-12-01 | 2001-05-08 | Telefonaktiebolaget Lm Ericsson | Remote procedure calls using short message service |
FI108832B (fi) * | 1999-03-09 | 2002-03-28 | Nokia Corp | IP-reitityksen optimointi accessverkossa |
SE518751C2 (sv) * | 2001-01-03 | 2002-11-19 | Microsoft Corp | Metod och system där en extern server erhåller information om enskilda mobila terminalers radioöverföringskapacitet |
US7298751B1 (en) * | 2002-05-31 | 2007-11-20 | Intel Corporation | SS7 gateway for wireless communication networks |
US7343004B2 (en) * | 2001-12-18 | 2008-03-11 | Siemens Energy & Automation, Inc. | Numeric and text paging with an integral PLC modem |
US7076249B2 (en) * | 2002-05-06 | 2006-07-11 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for generating management data for drifting mobile radios |
US7366516B1 (en) * | 2003-05-14 | 2008-04-29 | Sprint Spectrum L.P. | Localized SMS messaging based on location of a mobile station |
US7336943B2 (en) * | 2003-11-19 | 2008-02-26 | General Motors Corporation | Establishing mobile terminated connections with dynamically assigned wireless IP terminals in automotive telematics applications |
US7317706B1 (en) * | 2003-12-11 | 2008-01-08 | Nortel Networks Limited | Fair share scheduling method in a CDMA paging system |
FI20045258A0 (fi) * | 2004-06-30 | 2004-06-30 | Nokia Corp | Solukohtaisen tiedon hallinta |
-
2002
- 2002-10-03 FR FR0212243A patent/FR2845557B1/fr not_active Expired - Fee Related
-
2003
- 2003-09-26 EP EP03775447A patent/EP1550328A1/fr not_active Withdrawn
- 2003-09-26 CN CNA038236664A patent/CN1695393A/zh active Pending
- 2003-09-26 US US10/529,913 patent/US20050213578A1/en not_active Abandoned
- 2003-09-26 WO PCT/FR2003/002829 patent/WO2004032541A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999017579A2 (fr) * | 1997-09-30 | 1999-04-08 | Nokia Networks Oy | Radiorecherche d'un abonne mobile visant a etablir une connexion commutee par paquets |
WO2001028168A1 (fr) * | 1999-10-08 | 2001-04-19 | Microsoft Corporation | Transfert de donnees en paquets depuis un serveur de reseau vers une station mobile via un reseau de communication radio numerique |
Also Published As
Publication number | Publication date |
---|---|
CN1695393A (zh) | 2005-11-09 |
US20050213578A1 (en) | 2005-09-29 |
EP1550328A1 (fr) | 2005-07-06 |
FR2845557B1 (fr) | 2005-04-01 |
FR2845557A1 (fr) | 2004-04-09 |
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