EP1072164A2 - Affectation, sur demande, de canaux destines a des paquets de donnees - Google Patents

Affectation, sur demande, de canaux destines a des paquets de donnees

Info

Publication number
EP1072164A2
EP1072164A2 EP99912197A EP99912197A EP1072164A2 EP 1072164 A2 EP1072164 A2 EP 1072164A2 EP 99912197 A EP99912197 A EP 99912197A EP 99912197 A EP99912197 A EP 99912197A EP 1072164 A2 EP1072164 A2 EP 1072164A2
Authority
EP
European Patent Office
Prior art keywords
packet data
channel
data communication
cell
communication
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.)
Withdrawn
Application number
EP99912197A
Other languages
German (de)
English (en)
Inventor
Göran HALL
Hans-Olof Sundell
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
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of EP1072164A2 publication Critical patent/EP1072164A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Definitions

  • the present invention relates to allocation of channel resources in a radio communication system supporting transmission of packet data.
  • the invention also relates to a method of communicating packet data in a cellular radio communications network.
  • each cell In cellular radio communication systems, which are divided into a number of cells, each of which cells being served by a base station, and wherein a number of base stations groupwise are served or controlled by a switching arrangement, generally known as a mobile switching center, each cell generally contains a broadcasting channel (BCCH) for broadcasting of channel structure information on all the channels belonging to the cell.
  • BCCH broadcasting channel
  • channel structure information is here meant which kinds of channels exist, for what the channels are used etc.
  • the information broadcasted on the broadcast channel must contain information about the existence of, and possibly also the number of, packet data communication channels in the respective cells.
  • the packet data communication channels are here also referred to as packet physical channels (PPCH) .
  • PPCH packet physical channels
  • the usage of the packet data service however varies strongly throughout the network, i.e. the cellular radio communication system. There are for example cells in which the packet data service is used to a high extent as well as there are other cells in which the packet data service is used very sparsely.
  • each cell contains at least one packet data communication channel, i.e. a channel which is reserved for communication of packet data only. It is apparent, that in those cells in which communication of packet data only occurs to a very low degree, or very irregularly, it is unsatisfactory from the frequency planning point of view to always have at least one channel allocated for packet data communication purposes, i.e. to have one or more channels which only are used to a very limited extent or only occasionally in order to still provide a satisfactory grade of service for the packet data service. It is of course also disadvantageous from an economical point of view that the available channel resources in a cell or in a system in general are not used efficiently.
  • the cells have to be equipped with packet data communication channels in order to meet the requirements as to the grade of service as specified by the operator of the network.
  • the number of packet data communication channels in a given cell is completely independent of the actual packet data traffic load at a given time in a particular cell which means that one or more channels are reserved or occupied for carrying packet data also when there in fact is no packet data traffic at all or only to a very limited extent .
  • Dynamic allocation as such of channels is known from a number of documents for different purposes, such as using the radio resources to the best possible extent and to obtain maximum system capacity at the same time as the power transmitted from mobile stations is minimized.
  • What is needed is therefore a cellular radio communication system supporting communication of packet data in which the available channel resources in each, or at least a number of cells, are used to a high or satisfactory extent irrespectively of whether the packet data traffic is low or high, regular or irregular.
  • a system is also needed which enables a satisfactory frequency planning enabling an efficient use of channel resources.
  • a system is also needed which provides a good grade of service as far as packet data communication is concerned.
  • a method of allocating/deallocating channel resources in a cellular radio communication system supporting communication of packet data through which the above-mentioned advantages are obtained is also needed.
  • a cellular radio communication system which comprises a number of base stations each of which serves a cell, a number of switching arrangements, each of which in turn serving a number of base stations and a number of mobile stations.
  • Traffic channels are used for carrying speech and/or circuit switched data and control channels are provided for carrying signalling information or synchronization information.
  • the communication system furthermore supports communication of packet data.
  • the system comprises a number of resource management nodes for managing channel resources, e.g. allocating/deallocating channel resources, and in addition thereto a number of packet data handling nodes are provided for handling the packet data services in the system. At least in some of the cells, channel resources are allocated for communication of packet data in dependence of the demand to send packet data in the respective cells.
  • the resource management nodes as well as the packet data handling nodes can be arranged in a number of different ways in the system.
  • the resource management nodes are associated with the switching arrangements which for example are so called mobile switching centers (MSCs) .
  • MSCs mobile switching centers
  • the resource management nodes are arranged separately from the switching arrangements throughout the system.
  • the packet data handling nodes may be associated with the switching arrangements or they may be arranged separately from the switching arrangements. Still further some of the packet data handling nodes may be associated with switching arrangements whereas others are not.
  • each cell comprises a broadcast channel for broadcasting information about the channel structure of all channels in the respective cell.
  • a mobile station entering a cell or starting up a packet data session in a cell is via the broadcasting channel informed about whether the cell supports packet data communication or not.
  • a mobile station entering a cell, or starting a packet data session in a cell which has no channel allocated for packet data communication issues a request to the management node responsible for the cell, for a packet data channel resource. If there is an available traffic channel, such is reallocated as a packet data communication channel.
  • the mobile station includes means for sending a message requesting a resource for packet data transmission on a signalling control channel to the relevant resource management node.
  • the message may for example be contained in a set-up message and the resource management node receiving the request includes means for ordering the base station serving the cell to search for an available traffic channel. If an available traffic channel is found, the base station blocks the channel for traffic communication i.e. speech or circuit data communication and dedicates it temporarily for packet data communication.
  • the (a) signalling control channel of the cell is used by the resource management node for sending an information message to the mobile station containing the information that a channel has been allocated for packet data communication.
  • the mobile station having received such information, transmits a request for registration with the packet data handling node of the packet data communication channel and the mobile station then uses the reallocated channel for sending/receiving packet data.
  • the resource management node also includes means for sending a message to the mobile station over the signalling control channel if no available traffic channel is found. The mobile station then terminates the packet data session.
  • a channel allocated for packet data communication depending on demand is deallocated for carrying traffic (e.g. speech) after a predetermined period of time of non-usage of the channel for transmission of packet data by/to any mobile station in the cell.
  • a channel allocated as a packet data communication channel depending on demand is deallocated to function as a traffic channel if a priority call request (i.e. a priority speech/circuit data call request) is received in the resource management node .
  • means are provided for establishing the amount of packet data communication in a number of cells and demand-controlled allocation of traffic channels as packet data communication channels is implemented if the amount of packet data communication exceeds a given value.
  • one or more channels are constantly allocated as packet data communication channels whereas in cells in which a predetermined value for the amount of packet data communication is not exceeded, demand controlled allocation of channels for packet data communication is implemented.
  • demand controlled allocation of channels for packet data communication is implemented in cells in which the packet data communication load is high.
  • one or a number of channel resources may be constantly allocated for packet data communication whereas additional channels may be allocated on demand if the load is so high that the channels constantly reserved for packet - data communications are overloaded.
  • means are also provided for keeping control of the time during which a channel resource, reallocated for packet data communication on demand, is used to a given extent. If it is used more or less constantly for at least a given a period of time, the channel may be allocated as a constant packet data communication channel.
  • the coverage area of the radio communication system is divided into a number of cells and it supports packet data communication.
  • Traffic channels are used for carrying speech and/or circuit switched data in a conventional manner as well as control channels are used for signalling and/or synchronization information.
  • channels used for carrying traffic/circuit switched data are reallocated for communicating packet data in dependence of the demand in the respective cell .
  • the method preferably includes the steps of: broadcasting information from a resource management node to all mobile stations in the cell about the actual channel structure in the cell, ordering the base station serving the cell to search for and to block a traffic channel when a packet data communication channel is requested by a mobile station entering or being in the cell, intending to start up a packet data session, i.e. sending and/or receiving packet data, requesting the base station to start up the channel for packet data communication and, providing information to the mobile station about the channel reallocated for packet data communication and performing a registration with the packet data handling node.
  • the method also includes the step of transmitting information from the resource management node managing the cell to a mobile station requesting a packet data transmission resource if no traffic channel is found which is available for re-allocation as a packet data communication channel.
  • the mobile stations then terminates the packet data communication session.
  • the method further includes the steps of collecting information about the time period during which the packet data communication channel has not been used, and deallocating a packet data communication channel allocated upon request or depending on demand as a traffic channel if a predetermined time period is exceeded.
  • the method includes the step of deallocating at least a packet data communication channel allocated on request or depending on demand to communicate speech and/for circuit data, i.e. as a traffic channel, if a priority speech/circuit data call request for a traffic channel is received in the resource management node and no free traffic channel is found .
  • the method particularly includes the steps of : sending a deallocation request from the data handling node to the resource management node, sending a request to block the packet data communication channel from the resource management node to the base station, transmitting a response from the base station to the resource management node, blocking the packet data communication channel, and sending a traffic channel start-up request from the resource management node to the base station and using the deallocated channel for speech/circuit data communication on request .
  • Fig. 1 very schematically illustrates the structure of a cellular communication system in which resource management nodes and packet data nodes are associated with the switching arrangements
  • Fig. 2 is a figure similar to that of Fig. 1 disclosing an embodiment in which the resource management nodes and packet data handling nodes are arranged in different manners ,
  • Fig. 3 illustrates a mobile station moving through a number of cells
  • Fig. 4 schematically illustrates starting-up of a packet data communication channel on demand for a mobile station entering a cell
  • Fig. 5 is a figure similar to Fig. 4 in which a mobile station starts up a packet data session in a cell
  • Fig. 6 schematically illustrates deallocation of a packet data communication channel due to non-usage for a predetermined period of time
  • Fig. 7 schematically illustrates deallocation of a packet data communication channel due to reception of a priority call
  • Fig. 8 shows a flow diagram describing re-allocation of a traffic channel as a packet data communication channel on demand
  • Fig. 9 is a simplified flow diagram describing deallocation of a packet data communication channel due to non-usage.
  • Fig. 10 is a flow diagram illustrating deallocation of a packet data communication channel due to a priority call request .
  • Fig. 1 is a very schematical illustration of a cellular communication system.
  • a base station is associated, here base stations BS1, BS2 , ... serving the particular cell in which it is arranged.
  • a number of switching arrangements here particularly illustrated as mobile switching centers M-RD1, M-RD2, are provided, each of which serves a number of base stations.
  • M-RD1 is responsible for base stations BS3 , BS4, BS9, BS10, BS11, BS17, BS18 whereas M-RD2 controls base stations BS6, BS7, BS12, BS13, BS14, BS20, BS21 etc.
  • M-RD1 is responsible for base stations BS3 , BS4, BS9, BS10, BS11, BS17, BS18 whereas M-RD2 controls base stations BS6, BS7, BS12, BS13, BS14, BS20, BS21 etc.
  • a number of resource management nodes are provided for handling the allocation/deallocation of radio resources in the network.
  • the resource management nodes and the data handling nodes are associated with the respective switching arrangements M-RD1, M-RD2.
  • Fig. 2 a cellular communication system similar to that of Fig. 1 is schematically illustrated.
  • the switching arrangements here called MSC1 and MSC2 since they have the functionality of ordinary switching arrangements, respectively are arranged in cells 10 and 13 whereas additional switching arrangements MSC3 , MSC4 and MR-1 are arranged in cells 37, 40 and 63 respectively.
  • a resource management node RRMN-1 is separately located in cell 26 and it manages the cells belonging to MSC1, MSC2 and MSC4.
  • a data handling node PDN is provided in cell 23 and it handles the packet data service in cells controlled by MSC1, MSC2 and MSC3.
  • MR-1 is provided with which a resource management node is associated which controls at least the cells belonging to MSC4.
  • cell 60 a combined PDN/RRMN is provided.
  • the base stations are indicated in some of the cells.
  • This embodiment is illustrated to show that in one and the same network packet data nodes as well as radio resource management nodes either can be associated with switching arrangements or not and in that more than one alternative can be used in one and the same system.
  • cells Cl ' , C2',...,C7' of a cellular communication system are illustrated. In each cell Cl ' , C2 ',..., C7 ' a base station BS1', BS2 ',..., BS7' is arranged.
  • the switching arrangement here a mobile switching center MSC is associated with the resource management node RRMN and the packet data node PDN, i.e. included in one and the same entity 10.
  • Mobile station MSI moves around in the network for example through cells C5', C6', CV, C4 ' .
  • the user of MSI uses the packet data service and it is a requirement of the user that the packet data service is not interrupted in case the user enters a cell not supporting the packet data service, i.e. a cell having no channel allocated as a physical packet channel PPCH.
  • cells C5', CV and C4 ' along the route of MSI all have a channel allocated as a physical packet channel PPCH and it is irrelevant whether in any or more of these cells such a packet data communicating channel has been allocated on demand or whether it is constantly allocated as a packet data communicating channel.
  • cell C6' does not support the packet data service, i.e. no channel is allocated for packet data communicating purposes at the time being. For example the user of
  • MSI starts the packet data session in cell C5', which includes a physical packet data channel.
  • MSI enters cell C6' through the broadcast information sent out on the broadcasting channel
  • BCCH Packet Control Channel
  • MSI is made aware of the fact that C6' does not contain a PPCH. MSI then requests the network, i.e. the radio resource management node RRMN for a PPCH, i.e. MSI requests the starting up of a PPCH by using a traffic channel TCH available for reallocation in C6' .
  • RRMN radio resource management node
  • TCH traffic channel
  • FIG. 4 schematically illustrates the messages and the information sent between the mobile station MS, the base station BS, the packet data node PDN and the radio resource management node RRMN in a system according to the invention in which at least a particular cell uses allocation of packet data communication channels, also called packet physical channel PPCH, on demand.
  • packet data communication channels also called packet physical channel PPCH
  • a mobile station MS When for example a mobile station MS detects that it needs to perform a channel re-selection for example due to poor radio coverage on the currently used packet physical channel PPCH, the MS starts listening to the broadcasting channels BCCH of the neighbouring cells. The MS selects the strongest BCCH. Of course the MS may also select some other BCCH, if there are some particular reasons therefore; this is irrelevant for the functioning of the present inventive concept .
  • the broadcast information is sent out over the broadcast channels of the respective cells by the resource management node RRMN.
  • the MS When the MS has selected a BCCH (i.e. a cell) and received the information broadcasted over said BCCH, it is supposed that MS detects that the particular cell does not have any channel allocated as a PPCH. The MS then sends a message to the network, i.e. to the resource management node RRMN, for a PPCH, requesting that a PPCH is started up in the cell.
  • this message is sent on the signalling control channel SCCH. This can be done in different ways, for example through the use of a particular message type used in the SETUP message. Alternatively a specified feature activation code can be used in the SETUP message.
  • the SETUP message is a message initiating a call establishment.
  • RRMN finds such an available TCH, that TCH is marked busy and RRMN sends a blocking request to the base station BS of the cell, i.e. the BS is requested to block the found TCH.
  • the BS has blocked the particular TCH, it sends a response to the RRMN informing RRMN that the particular TCH is blocked.
  • the RRMN then sends a request to the BS to start up a PPCH using the same resource that was blocked for communication of speech/circuit data, i.e. to reallocate the channel used as a traffic channel to act as a PPCH instead.
  • the BS reports to the RRMN that the PPCH has been started up in a start-up PPCH response message.
  • the RRMN then transmits a message to the mobile station over the signalling control channel SCCH to inform the MS that the PPCH is started and that it operates on a particular channel having a particular channel structure, i.e. the MS is informed about the channel identity and of the channel structure.
  • the RRMN advantageously substantially simultaneously, changes the broadcast information to include also information about the existence of the newly started PPCH so that any other mobile station entering, or intending to enter the cell, is informed about the existence of a PPCH in the cell.
  • the MS then moves to the PPCH and uses the PPCH for performing the normal packet channel registration procedure which is done with the packet data node PDN which issues a response message to the MS when the registration has been completed.
  • RRMN If, however, the RRMN is not able to find an available traffic channel, RRMN sends a message to the MS, e.g. through transmission of an error code, to inform the MS that no channel can be allocated as a PPCH in the particular cell. MS then terminates the packet data service and the user is informed that the communication with the network has been lost. Alternatively, instead of terminating the packet data service, the MS might instead listen to another broadcast channel of another neighbouring cell and the same procedure as described above would be repeated in that other cell.
  • a PPCH allocated on demand i.e. upon request, in a cell, may be deallocated or reallocated so as to reassume its original functionality on the occurence of certain events or if some given requirements are met, i.e. a traffic channel reallocated as a PPCH on demand, may again be deallocated to function as a traffic channel.
  • a time period may be defined on a per cell basis, which time period may be characteristic for a given cell or it may be the same for a number of cells within a given area such as for example a so called packet paging area which is the cell area covered by a PDN.
  • any alternative is in principle possible, the main thing being that if a predetermined time period has elapsed during which the channel allocated as a PPCH has not been used for carrying packet data, i.e. there are no MSs registered on this PPCH meaning that there are no MSs which, although not actually sending any packet data, still are registered on the PPCH, it is deallocated.
  • a traffic channel if available, is reallocated to function as a packet data communication channel instead, giving a very flexible system in which the channel resources are efficiently utilized.
  • the deallocation procedure may be carried out stepwise through deallocating one channel at a time even if the demand for example has gone down so drastically that there actually is no demand at all for a predetermined period of time, for example taking into account the fact that the probability that the demand goes up again in short may be high or for some other reason.
  • the deallocation of channels may of course be coordinated so that if there is actually no demand at all for PPCHs, all PPCHs of the cell may be deallocated substantially simultaneously.
  • Another reason for deallocating a PPCH may be the reception of a priority speech/circuit data call requiring a traffic channel .
  • a priority speech/circuit data call is an SOS-call from another mobile station in the cell and if there are no free traffic channels available.
  • both or either reasons for deallocation of a PPCH may be implemented in one or more cells of the system. It is also possible to constantly allocate a PPCH allocated on demand as a "constant" PPCH if the demand exceeds a given value or if it is high during a predetermined time interval which advantageously is quite long.
  • the embodiment described with reference to Fig. 4 assumes that the MS has done a first packet registration in a cell containing a PPCH. In Fig.
  • a MS wants to initiate a packet data session when it is in a cell having no PPCH.
  • Fig. 3 it is e.g. supposed that MSI wants to start up a packet data session when it is in C6' .
  • the procedure is substantially the same as the procedure described with reference to Fig. 4, but instead of a packet channel registration request a packet communication registration request is sent from the MS to the PDN when a PPCH has been started up.
  • the signal from PDN to the MS will then, correspondingly, be a packet communication registration response.
  • Fig. 6 schematically illustrates the sending of messages in the case of deallocation of a PPCH because of non-usage during a predetermined time interval.
  • the detection of non-usage of an on- demand allocated PPCH for a predetermined time takes place in the packet data node PDN.
  • the PDN marks the PPCH as inavailable and transmits a message to the resource management node RRMN containing a request to deallocate the PPCH.
  • RRMN then sends a blocking request to the BS to block the PPCH.
  • the BS sends a response message that the blocking of the PPCH has been completed to the RRMN.
  • the RRMN then also changes the broadcast information in the concerned cell, i.e. the broadcast information will no longer indicate support for PDS in the cell or alternatively it will contain information about the level of PDS support in the cell. This is not explicitly indicated in the figure.
  • the RRMN then sends a request to the base station to start up the channel for carrying speech/circuit data i.e. to act as a TCH again.
  • a response is transmitted from the BS to the RRMN.
  • the channel resource again allocated for traffic communication will then be used by the RRMN when needed.
  • Fig. 7 schematically discloses the sending of messages when a PPCH is deallocated because of reception of a priority speech/circuit data call, in the following in short called a priority call, in the RRMN. It is then supposed that a priority call SET-UP message is received in the RRMN. This means that the RRMN has to find a free traffic channel TCH for said priority call. If the RRMN establishes that there is no channel resource having the functionality of a traffic channel available, the RRMN checks if there is any traffic channel which has been reallocated as a packet data communication channel, RRMN sends a blocking request to the base station that the PPCH be blocked. When this has been done, the BS sends a response to the RRMN.
  • the RRMN at the same time changes the broadcast information in the concerned cell in the corresponding manner.
  • the RRMN then sends a start-up request to the base station that the channel resource is to be re-started to function as a traffic channel again. Thereupon a response is provided from the BS to the RRMN which uses the TCH for the priority call.
  • An MS using PDS searches and finds a new cell C N , 100, as discussed above.
  • the MS receives information on the cell structure of the new cell C N over the broadcasting channel of C N , 101.
  • the mobile station examines whether there is any (available) PPCH facility in C N , 102. If C N actually does contain an available PPCH, MS uses that PPCH, 102A. If on the other hand MS establishes that there is no PPCH in C N (or not sufficient capacity for packet data communication) , MS sends a request for a PPCH to RRMN, 103.
  • RRMN then examines if any free traffic channel TCH can be found, 104. If not, in this particular case, the MS terminates its PDS session 104A. If, on the other hand, a free TCH is found by RRMN, RRMN sends a request to base station BS in C N to block the found channel resource for traffic (i.e. speech or circuit data) communication, 105. It is supposed that the found channel resource is denoted TCH X .
  • the base station then informs RRMN that TCH X has been blocked, 106, for speech/circuit data communication whereupon RRMN sends an order to the base station to start-up the channel resource for packet data communication as PPCH d (physical packet channel on demand) using the channel resource previously used for traffic communication, i.e. former TCH ⁇ 107.
  • PPCH d physical packet channel on demand
  • the start-up of the PPCH d is then confirmed by the base station through the sending of a response message to the RRMN, 108, and RRMN sends information to the MS about PPCH d and it also up-dates the broadcast information to include information about the existence of PPCH d , 109.
  • the mobile station then requests PPCH d registration with the packet data node using the PPCH d in a conventional manner, 110.
  • the PPCH d request is then confirmed by the packet data node by a packet channel registration response on the PPCH d , 111.
  • Fig. 9 is a schematical flow diagram describing the deallocation of a channel resource from having the functionality of carrying packet data to speech/circuit data communication. It is here supposed that a time period of non-usage of the on-demand- allocated PPCH d , after which deallocation is to take place, has been given. This information is contained in storing and processing means in the packet data node PDN. Thus, in PDN the time period of non-usage of PPCH d is surveilled, 201, and it is examined if the time period of non-usage of PPCH d exceeds a predetermined threshold value T tr , 202. If the time period has not been exceeded, the channel resource remains allocated as PPCH d , 202A.
  • a deallocation request is sent from PDN to RRMN, 203, requesting that the channel resource be no more used for packet data communication.
  • RRMN Upon receiving such a deallocation request from PDN, RRMN sends a blocking request to BS, 204, that BS should block the channel resource allocated on demand for communication of packet data. BS then performs a blocking operation and sends a blocking confirmation message to RRMN, 205, that PPCH d has been blocked.
  • RRMN sends a start-up request to BS that the channel resource be used for speech/circuit data communication again as traffic channel TCH, 206.
  • the TCH start-up is confirmed by the base station through a message sent to the RRMN, 207, and RRMN up-dates the broadcasting information correspondingly, 208. If there is a request for a traffic channel TCH, 209, TCH will be used for speech/circuit data, 209A. If on the other hand there is no actual request for the traffic channel resource, TCH remains available for traffic communication unless a new PDS-request is received in RRMN, 210. Of course, if such a request is received in RRMN and there are also other traffic channels available, or free, also another traffic channel may be selected for re-allocation as a PPCH on demand.
  • Fig. 10 is a schematical flow diagram describing the procedure when a priority speech/circuit data call set-up request is received in RRMN, 301.
  • RRMN Upon reception of such a request, RRMN performs a search for a free traffic channel, 302. If a free traffic channel is found, 303, the found traffic channel is used for the priority call, 303A. If, however, no free traffic channel is found, RRMN examines if there is any PPCH in the concerned cell, 304. If there is no PPCH in the cell, any traffic channel may be reallocated for the priority call set-up 304A using any appropriate technique. How this is done is not relevant for the functioning of the present invention.
  • RRMN requests the base station to block the PPCH d allocated on demand, 305. (If there are more than one PPCH one of them is selected accordinging to same given criteria; generally if a particular PPCH is not actually used, or used only to a very limited extent, that PPCH is selected. Different selection criteria may be given.) After blocking has been performed, it is confirmed by the base station, 306, and the broadcast information is up-dated by RRMN, 307. RRMN then requests the base station to start-up a traffic channel using the channel resource that had been used for packet data communication, 308.
  • the start-up of the traffic channel is confirmed by the base station, 309, in a message sent to RRMN, and the traffic channel is used for the priority call, 310.
  • the deallocation procedure does not have to be limited to channel resources allocated for packet data communication on demand but it could also be implemented on channel resources "constantly" allocated as packet physical channels.
  • the deallocation procedure as far as channels constantly allocated as PPCH.s are concerned, only is implemented in the case of priority calls when neither any free traffic channel nor any on-demand allocated PPCH can be found.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention concerne un système de radiocommunication comprenant un certain nombre de stations de base (BS1', ..., BS7') qui desservent chacune une cellule (C1',...,C7'), un certain nombre de systèmes de commutation qui desservent chacun un certain nombre de stations de base, et un certain nombre de stations mobiles (MS1). Les canaux de trafic sont conçus pour la communication de la parole et/ou de données à commutation de circuits. Des canaux de commande permettent la communication d'informations de signalisation et/ou d'informations de synchronisation. Le système supporte la communication de paquets de données. Un certain nombre de noeuds gestionnaires de ressources (10) permettent de générer les ressources canaux et un certain nombre de paquets de données gérant des noeuds permettent de gérer les services de paquets de données. Au moins dans certaines cellules, des ressources peuvent être affectées sur demande de communication de paquets de données dans les cellules respectives. L'invention concerne également un procédé d'affectation des ressources canal dans un système de radiocommunication cellulaire supportant la communication de paquets de données.
EP99912197A 1998-03-17 1999-03-12 Affectation, sur demande, de canaux destines a des paquets de donnees Withdrawn EP1072164A2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9800868A SE516234C2 (sv) 1998-03-17 1998-03-17 System och förfarande för allokering av kanalresurser i ett radiokommunikationssystem
SE9800868 1998-03-17
PCT/SE1999/000381 WO1999048317A2 (fr) 1998-03-17 1999-03-12 Affectation, sur demande, de canaux destines a des paquets de donnees

Publications (1)

Publication Number Publication Date
EP1072164A2 true EP1072164A2 (fr) 2001-01-31

Family

ID=20410569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99912197A Withdrawn EP1072164A2 (fr) 1998-03-17 1999-03-12 Affectation, sur demande, de canaux destines a des paquets de donnees

Country Status (7)

Country Link
EP (1) EP1072164A2 (fr)
JP (1) JP2002507871A (fr)
CN (1) CN1302515A (fr)
AU (1) AU3062199A (fr)
CA (1) CA2322394A1 (fr)
SE (1) SE516234C2 (fr)
WO (1) WO1999048317A2 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0030644D0 (en) * 2000-02-18 2001-01-31 Nokia Networks Oy Communications system
EP1169799B1 (fr) * 2000-02-18 2003-11-26 Nokia Corporation Systeme de telecommunications
US6725031B2 (en) 2000-07-21 2004-04-20 Telemac Corporation Method and system for data rating for wireless devices
EP1312201A4 (fr) 2000-07-21 2008-04-23 Telemac Corp Procede et systeme de tarification de donnees pour dispositifs sans fil
CN1549650A (zh) * 2003-05-19 2004-11-24 华为技术有限公司 一种用户终端建立业务连接的方法
KR101082734B1 (ko) * 2006-08-07 2011-11-10 콸콤 인코포레이티드 비동기식 무선 통신을 위한 컨디셔널 요청들
US9008002B2 (en) 2006-08-07 2015-04-14 Qualcomm Incorporated Conditional requests for asynchronous wireless communication

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0744511B2 (ja) * 1988-09-14 1995-05-15 富士通株式会社 高郊率多重化方式
US5594738A (en) * 1993-10-18 1997-01-14 Motorola, Inc. Time slot allocation method
FI96558C (fi) * 1994-09-27 1996-07-10 Nokia Telecommunications Oy Menetelmä datasiirtoa varten TDMA-matkaviestinjärjestelmässä sekä menetelmän toteuttava matkaviestinjärjestelmä
FI96557C (fi) * 1994-09-27 1996-07-10 Nokia Telecommunications Oy Menetelmä datasiirtoa varten TDMA-matkaviestinjärjestelmässä sekä menetelmän toteuttava matkaviestinjärjestelmä
US5790551A (en) * 1995-11-28 1998-08-04 At&T Wireless Services Inc. Packet data transmission using dynamic channel assignment

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9948317A3 *

Also Published As

Publication number Publication date
JP2002507871A (ja) 2002-03-12
SE9800868L (sv) 1999-09-18
SE516234C2 (sv) 2001-12-03
WO1999048317A2 (fr) 1999-09-23
SE9800868D0 (sv) 1998-03-17
AU3062199A (en) 1999-10-11
CA2322394A1 (fr) 1999-09-23
WO1999048317A3 (fr) 1999-11-04
CN1302515A (zh) 2001-07-04

Similar Documents

Publication Publication Date Title
US6212389B1 (en) Methods and apparatus for controlling allocation of traffic channels in macrocell/microcell telecommunications networks
EP1217852B1 (fr) Procédé pour l'allocation de ressources radio et station de base utilisant ledit procédé
US5966662A (en) Subscriber paging control in a mobile communication system
CA2025228C (fr) Porteur pour balise
FI107690B (fi) Parannettu menetelmä ja järjestely solun valinnan hallitsemiseksi ja solukkojärjestelmän päätelaite
EP0819363B1 (fr) Planification automatique des canaux de commande dans des systemes d'attribution adaptative de canaux
US5937353A (en) Method and apparatus for controlling allocation of traffic channels in macrocell/microcell telecommunications networks
US7979076B2 (en) Method of managing resources in a cognitive radio communication system
EP0995278B1 (fr) Affectation du trafic et equilibrage dynamique de la charge dans un systeme cellulaire
JP4463989B2 (ja) 無線通信に関する装置、システムおよび方法
US6532227B1 (en) General packet radio service
EP1142414B1 (fr) Procede et dispositif de reservation de ressources dans un systeme de radiocommunication mobile
JP3204992B2 (ja) 無線通信を行う無線回線の割り当て方法
EP1188335A1 (fr) Systeme et procede visant a reduire les appels interrompus dans un reseau de communication sans fil
JP2000174820A (ja) パケット無線サ―ビスのデ―タ伝送方法及びその装置
JP2002539732A (ja) セルラ通信システムにおける通信資源の時分割
US6466795B1 (en) Method for improving resource allocation in a wireless communications system using broadcast resource information
MY123442A (en) Temporary wireless local-loop in cellular mobile networks
WO1999048317A2 (fr) Affectation, sur demande, de canaux destines a des paquets de donnees
JP2002500847A (ja) ディジタルセルラ式移動無線ネットワークの２つのセル間で呼をハンドオーバする方法
JP2002523995A (ja) レイヤード無線通信システムおよび方法
GB2322520A (en) Method for Allocating a Communications Resource for a Group Call
KR20020051698A (ko) 무선 자원 할당 방법
MXPA00009876A (en) Increasing traffic capacity in a cellular communications system by change of traffic channel rate

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20001005

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): DE FR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20031001