FR2876242A1 - UNIT FOR CONTROLLING ACCESS TO THE SUPPORT, MOBILE TELEPHONY INSTALLATION AND METHOD FOR REPRODUCING DATA TO BE TRANSMITTED USING A MOBILE TELEPHONY INSTALLATION. - Google Patents

Abstract

For the stored transfer formats which are declared temporarily authorized by a mobile telephone base station, it is checked whether these transfer formats satisfy a selection criterion specific to the mobile telephone installation. The transfer format used to transmit the data is exclusively selected from among the transfer formats which satisfy the selection criterion specific to the mobile telephone installation.

Description

UNIT INTENDED TO ORDER ACCESS TO THE SUPPORT,

MOBILE TELEPHONY INSTALLATION

  The invention relates to a unit for controlling access to the medium, a mobile telephony installation and a method for reproducing data to be transmitted. using a mobile phone installation.

  Such a unit intended to control access to the support, such a mobile telephone installation and such a method are known in the context of the UMTS mobile telephone system (universal telecommunications system with mobiles).

  A UMTS mobile telephone system usually has a Core Network (CN), a UMTS Terrestrial Radio Access Network (UTRAN) and a large number of mobile radiotelephone terminals (UE: User Equipment or User Equipment). UMTS has a transmission mode called FDD (Frequency Division Duplex) mode; in this respect the signals are transmitted separately upstream ("uplink"), ie the direction in which the signals are transmitted from a mobile radio terminal to one of the base stations in the network. mobile access) and in the downlink ("downlink") direction, ie the direction in which the signals are transmitted from a base station associated with one of the mobile radiotelephone terminals in the access network of the mobile telephony to the mobile radiotelephone terminal) by assigning different frequencies or ranges of frequencies.

  To transmit data between a mobile radiotelephone terminal and one of the base stations of a mobile telephone cell, the UMTS defines a radio interface subdivided into trcis protocol layers. Document (1) presents and describes in detail the protocol layers of the UMTS radio interfaces.

  As described in Document (2), the 3rd Generation Partnership Project (3-GPP) is working to improve packet data transmission through the transfer channel. DCH channel (DCH) according to UMTS in uplink mode for UMTSFDD mode.

  One of the three protocol layers in the UMTS radio interface is known as the Radio Resource Control (RRC) protocol layer. RRC or RCC protocol layer is used to create, delete and reconfigure physical channels, transfer channels, logical channels, signaling radio bearers and radio bearers as well as to establish all layer parameters protocol in layer 1 and layer 2 according to UMTS. As described in document (3), the RRC layer units in the mobile radiotelephone terminal and in the control unit of the mobile telephone network exchange corresponding RRC meshes for this purpose via the intermediary means. dio signaling.

  In general, to manage the mobile radio transmission resources in the mobile radio terminal when it is a question of transmitting packet data upstream, it is known that the mobile radiotelephone terminal communicates with a mobile radio unit. Mobile Radio Network Controller (RNC) at the RRC protocol layer information on the performance of data traffic in a transfer channel. Measurement report called messages are loaded. In this context, as represented in the following Table 1, buffer filling levels, that is to say the filling level of the buffer memory in the RLC units, for the transfer channel concerned are indicated in FIG. the control unit of the relevant mobile phone network at this time. In other words, according to (3), there is transmitted to the control unit of the mobile network at the level of the RRC layer how much data is to be transmitted at that moment in the buffers of the RLC units of the RRC. mobile radiotelephone terminal concerned.

  In this respect, the mobile telephony transmission resources are understood to be the transmission power available to the mobile radiotelephone terminal, the number and the extension factor of the assigned CDMA codes.

  Table 1 shows by way of example such a list of measurement results as given in document (3).

  Denomination of the element or group of information

Semantic description

  Results of traffic volume measurements

OP

  1a <max RB> Identity RB identity RB 10.3.4.1.6

MP

  Ob-stream Quantity Type and Reference OP payload enumerated (0, 4, in bytes 8, 16, 32, 64, n Ko = N * 1024 bytes.

  Twelve reserve values are required 128, 256, 512, 1024, 2 KB, 4 KB, 8 KB, 16 KB, 32 KB, 64 KB, 128 KB, 256 KB, 512 KB, 1,024 KB) listed ( 0, 4, in bytes 8, 16, 32, 64, n Ko = N * 128, 256, 512, 1024 bytes.

  1 024, 2 KB, Twelve 4 KB, 8 KB, 16 KB, 32 KB, are required - 64 KB, 128 KB, 256 KB, 512 KB, 1,024 KB) OP listed (0, 4, in bytes 8, 16, 32, 64, n KB = N * 128, 256, 512, 1024 bytes.

  1024, 2KB, Twelve 4K, 8K, 16KB reserve values are required

Table 1

  Using this information, the mobile telephone network control unit can configure the mobile radio terminal according to the information it receives, for example to limit or increase the useful transmission formats of the mobile radio terminal. a mobile radiotelephone terminal or to carry out a handover to another mobile telephone cell, to reconfigure specialized physical channels or to change the RRC state, in particular the RLC buffer Average of the OP payload of the RLC buffer Variance of the payload of the RLC buffer is changed from a first state RRC CELL DHC to a second state RRC CELL FACH.

  The list of measurement results shown in Table 1 is therefore sent by an RRC unit located in the mobile radiotelephone terminal to the RRC unit located in the control unit of the corresponding mobile telephone network; the relevant filling level of the RLC buffer is displayed for each radio bearer (RB). The values can be given either in absolute value (RLC buffer payload), in average value (mean RLC buffer payload) or in deviation from a defined value (variance of the payload of the RLC buffer). RLC buffer).

  The 3-GPP Standardization Committee is currently working to improve packet data transmission via dedicated uplink transfer channels, ie uplink for the UMTS radio interface. FDD mode, to increase data throughput and transmission speed. In order to make a better difference with the already existing DCH dedicated transfer channel, a new dedicated transfer channel has been created under the name E-DCH (Enhanced Dedicated Channel). The main properties of this new transfer channel are to use a method called HARQ (Hybrid Automatic Repeat Request :: Hybrid Automatic Repetition Request) which derives from the stop and hold process at N channels, a scheduling controlled by the base station ( also called Node-B in the context of UMTS) as well as frame lengths less than or equal to 10 ms.

  The N-channel stop and wait HARQ method is a transmission security method in which an HARQ process number N is configured for a mobile radio terminal, each of the HARQ processes representing an occurrence of the process. stop and wait. For each HARQ process, the data is sent to the network and is stored temporarily until a confirmation that the data has been correctly received (ACK, Acknowledgment) is received from the network. Otherwise the data is sent back to the network, that is, in case the data has not been correctly received (NACK, Negative Acknowledgement).

  Controlled scheduling Node-B is a method according to which scheduling in the mobile radiotelephone terminal, i.e. selecting a suitable transfer format from a quantity of defined transfer formats for the channel E-DCH is controlled in the following way: depending on the traffic situation in the mobile cell concerned, the Node-B can make the use of transfer formats among the amount of defined transfer formats for the E-DCH transfer channel is temporarily limited or extended for a mobile radio-telephone terminal.

  It has not yet been decided how to transmit the data in detail via the new E-DCH transfer channel via the UMTS radio interface. One possible solution is to re-start according to their priority in different buffers, called Priority Queues (PQs), the data that is then supported and thus transmitted more or less early depending on their importance.

  As mentioned above, a transmission security method (HARQ) is used whereby the network sends to the mobile radiotelephone terminal a confirmation that the data has been received either correctly or incorrectly. For this function too, the mobile radiotelephone terminal has different buffers that temporarily store the data until their good reception is confirmed.

  Both functions are performed inside the MAC protocol layer, in the new partial protocol layer provided for this purpose, ie in what is called a MAC-e upstream entity (Medium Access Control Enhanced: which exists (ie, is implemented) on both the terminal side and the network side. On the network side, the entity that executes the communication protocol according to MAC-e is in the Node-B, that is to say in the UMTS base station.

  In the mobile radio terminal (UE: User Equipment or UE), one of the important functions of the partial MAC-e protocol layer is to schedule the data to be transmitted for the uplink (upstream) link from a selection method for the transfer format, that is to say to select at certain predefined times a transfer format adapted to the transfer channel E-DCH according to the transmission rate authorized at that time, the priority of the data to be transmitted as well as the available transmission power in the E-DCH transfer channel.

  In the following, the selection process for the transfer format described in (4) and (5) is explained in more detail.

  Depending on the number and type of communication services used by a mobile radio terminal, in other words a user device when it comes to transmitting upstream data, the control unit of the mobile telephone network configures for the mobile radio terminal a number of dedicated transfer channels (DCHs) at the time the communication link is established. A set of transfer formats (TFS: Transport Format Set) that contains a number of transfer formats is configured for each transfer channel. The possible combination of transfer formats for all DCH transfer channels is determined by the set of combined Transport Format Combination Set (TFCS) upstream. Based on the set of combined upstream transfer formats, the MAC-d unit executes in the mobile radiotelephone terminal the scheduling based on the selection method for the combined transfer formats, ie that at given times an appropriate transfer format is selected for each configured transfer channel, as a function of the momentary transmission rate, as a function of the priority of the data in the logical channels reproduced in the transfer channel in question and depending on the available transmit power of the mobile radio terminal. Documents (4) and (5) give details of this method.

  It is ensured by the scheduling process that the data of a communication service is transmitted via the radio interface in a manner that corresponds to its quality of service profile (QoSProfil: Quality of Service Profile). It is furthermore ensured that the selection of combined transfer formats is adapted to each transmission situation in the mobile telephone cell, ie only a limited number of combined transfer formats are available when the conditions are met. are of poor transmission, so that the interference produced by a mobile radiotelephone terminal is maintained within certain transmission limits. On the other hand, when the transmission conditions are good, all the combined transfer formats are generally available in the mobile telephone cell, so that the interference produced by a mobile radiotelephone upstream remains within the framework of the quality of service provided. .

  The method for selecting the combined transfer formats has the following main properties.

  At defined times, the different combined transfer formats are checked for status within the given combined transfer format set. As shown in a status graph 700 in Fig. 7, based on this status check, a combined transfer format can be in one of the following states or be associated with it: a first state 701 called "enabled state" "(supported state), a second state 702 called" excess power state "and a third state 703 called" blocked state ".

  To check the status of the combined transfer formats, the power is evaluated based on the momentary transmit power and the maximum transmit power allowed by the mobile radio terminal.

  All combined transfer formats that do not satisfy the so-called "elimination criterion", that is, that require transmission power less than the maximum allowable transmit power, are associated with the first state 701, that is to say, the "allowed state". Each of the passages of the second state 702 or the third state 703 at the first state 701 is designated by the reference 704 "i.e recovery criterion is filled (recovery criterion is rret)".

  All combined transfer formats that require transmission power greater than the maximum allowable transmit power are associated with the second state 702, "power state exceeded"; the transition from the first state 701 to the second state 702 is in FIG. 7 the reference 705 the elimination criterion is fulfilled (criterion elimi- nation is met) ".

  - All combined transfer formats that satisfy the so-called "blocking criterion", that is, some time in the second state 702, are associated with the third state 703, "blocked state"; the pas-sage of the second state 702 to the third state 703 has the reference 706 "the blocking criterion is filled (bloc-king criterion is met)".

  In the method for selecting combined transfer formats, only the combined transfer formats in the first state 701 "enabled state" are taken into account, that is, among the combined transfer formats that are in the first state 701 "state enabled "the MAC-d unit selects the combined transfer formats based on the momentary transmission rate and the priority of the data in the logical channels that are reproduced on the different DCH transfer channels. For this purpose, the logical channels are assigned different priorities between 1 and 8, priority 1 being the maximum priority and priority 8 the minimum priority. In the method for selecting combined transfer formats, data packets from logical channels with the highest priority are favored based on these priorities.

  For the combined transfer formats that are in the second state 702 power state exceeded "or in the third state 703" state off ", the state of these combined transfer formats is continuously checked. transfers which satisfy the so-called "recovery criterion" then return to the first state 701 "enabled state", i.e. the method for selecting combined transfer formats takes them back into The transitions between states refer to Figure 7, reference 704, "the criterion of recovery is fulfilled".

  In the method for selecting combined transfer formats, the combined transfer formats which are in the second state 702 "power state exceeded" are generally not taken into account. The exception is the combined transfer formats in the so-called Transport Format Combination Minimum Set. The combined transfer formats in the minimum set of transfer format, i.e. the combined transfer formats which have a minimum quantity, are specified by the control unit of the mobile network RNC and they must ensure that the mobile radio telephone terminal has a guaranteed minimum rate of data transmission. In the method for selecting combined transfer formats, therefore, these combined transfer formats are taken into account anyway, even if they require a transmission power greater than the maximum transmission power allowed in the radiotelephone terminal. mobile.

  As described above, the RNC mobile network control unit is responsible for managing the mobile telephony resources of all mobile and mobile radiotelephone terminals within the mobile phone network. a mobile network subsystem (RNS: Radio Network Subsystem). To achieve this, it is known that the control unit of the mobile telephone network can configure a mobile radio terminal to take corresponding measurements.

  According to the UMTS mobile telephone communication system, the various measurements made by the mobile radiotelephone terminal are divided into six different types.

  - measurements within frequencies, measurements between frequencies, measurements between systems, quality measurements, internal measurements and - measurements which determine the position of the mobile radiotelephone terminal.

  Document (3) gives details of these measures.

  As shown in the message flow chart 800 in FIG. 8, the control unit of the mobile telephone network 801 initiates a specific measurement by sending at the level of the RRC protocol a so-called control message of the measurement 802. (measurement control) in a downward direction to the mobile radio terminal 803 via so-called signaling radio bearers (SRS). This control message 802 informs the mobile radiotelephone terminal 803 of the time, manner and nature of the measurements it must make. After making a measurement, the mobile radio terminal 803 produces and sends to the control unit of the mobile telephone network 801 a so-called measurement report message 804 (measurement report) which gives the results of the measurement in ascending direction.

  From the information contained in the measurement report message 804, the mobile telephone network control unit 801 can conveniently configure the mobile radio terminal 803, for example reconfigure the number of transfer formats. or the specialized physical channels of the mobile radio terminal 803 or perform a handover to another mobile cell.

  As has been described above, according to the state of the art, the method for selecting each of the transfer formats used or each of the combined transfer formats requires a lot of calculations since all the controls, the rankings and the passages of The status is achieved in the mobile radiotelephone terminal itself and the status checks in the mobile radiotelephone terminal must always take place for all transfer formats and for all the combined transfer formats stored therein.

  In addition, all combined transfer formats must be checked at given times for their momentary status and modified accordingly. This also implies a very long calculation in the mobile radiotelephone terminal.

  A method for controlling the transmission power of a high speed dedicated physical control channel (HSDPCCH) in a mobile radio terminal is described in (6). The mobile radiotelephone terminal is informed by an offset of the transmission power and the increase of the transmitting power in the upstream HS-DPCCH is determined. The Node-B is informed of the offset of the transmission power.

  Document (7) describes a method for controlling a mobile telephone connection between a mobile telephone network and a mobile radio terminal. The momentary transmit power of the mobile radio terminal is taken into account when allocating mobile telephony resources and performing other operations in the mobile telephony network.

  Document (8) describes a method for optimizing downstream capabilities from which the transmission power between several mobile telephony cells is taken into account. An overload situation is determined in a mobile telephone cell overloaded with the mobile telephone network. A neighboring mobile cell is identified where there is no overhead. In addition, a user node which has established a communication link with the mobile telephone network is determined, the downlink data transmission from the overloaded mobile telephone cell is prevented from being transferred to the user node and a change is made possible. downstream data transmission through a communication link from the mobile telephony cell without overload.

  Document (9) discloses a method according to which, because a plurality of triggering events take place, the mobile telephone network requests different measurement report messages from the mobile radiotelephone terminal.

  The document (10) describes a method for selecting combined transfer formats. According to this method, the physical layer sends to the MAC protocol layer a notification message which is used to indicate when the maximum transmit power has been reached during a transmission.

  The publication (11) describes a method for selecting combined transfer formats from which combined transfer format classes are formed and selecting a class based on a transmission power value.

  The publication (12) describes a method for determining the accepted combined transfer formats from which a state is determined for each combined transfer format based on the transmit power required for the combined transfer formats and a selection. takes place on the basis of the states.

  Publication (13) discloses a method for controlling inter-system handover based on which a reduced amount of combined handover formats are signaled to a mobile radio terminal.

  The publication (14) describes a method for transmitting data packets using a radio interface from which a control unit sends a configuration message and from which a transfer format is selected based on on information contained in the configuration segment.

  Document (15) discloses a method for modulating a radio link from which adaptively select a number of channelization codes and an encoding and modulation scheme and from which information about the scheme of The selected coding and modulation scheme and the number of channelization codes are transmitted by the radio link to a receiver.

  The invention aims to allow to select in a mobile radio terminal, more simply than in the state of the art, one or more transfer formats in the layer for controlling the access to the support.

  This object is achieved by a unit for controlling access to the medium, by the mobile telephone installation and by the method for reproducing data to be transmitted by means of a mobile telephone installation according to the invention. invention.

  A unit for controlling access to the medium in a mobile telephone installation is adapted to reproduce, with the aid of the mobile telephone installation, data to be transmitted from at least one logical channel to the least one transfer channel. The unit for controlling access to the medium has at least one transfer format memory for storing a plurality of transfer formats, a transfer format including control parameters from which the unit for controlling the access to the medium is transferred. support reproduces the data from the at least one logical channel on the at least one transfer channel. In the unit for controlling media access, there is at least one unit for selecting transfer formats for selecting a transfer format to be used from the large number of stored transfer formats. The unit for selecting transfer formats is designed to check whether the stored transfer formats which satisfy a selection criterion predefined by a mobile telephone network unit satisfy a selection criterion specific to the telephony installation. mobile. The unit for selecting transfer formats is further designed such that the transfer format used to reproduce the data on the at least one transfer channel is selected from the transfer formats which satisfy the selection criterion specific to the mobile phone installation.

  In a method for reproducing, with the aid of a mobile telephone installation, data to be transmitted from at least one logical channel to at least one transfer channel in a "bearer access control" protocol layer of the mobile telephony installation, it is checked whether the transfer formats which are stored in the mobile telephony installation and which satisfy a selection criterion predefined by a unit of the mobile telephony network satisfy a selection criterion of their own choice. at the mobile phone installation. A transfer format includes control parameters that reproduce the data from the at least one logical channel on the at least one transfer channel using the unit for controlling access to the medium. The transfer format used to reproduce the data on the at least one transfer format is selected from the transfer formats that satisfy the selection criteria specific to the mobile telephone installation.

  A mobile telephone installation comprises a unit intended to control the access to the medium described above.

  It can be considered that the particularity of the invention consists in selecting a suitable transfer format, or possibly suitable combined transfer formats, in a mobile telephone installation, preferably a mobile radio terminal, in which a radio mobile terminal is usually stored. number or a large number of combined transfer formats and / or transfer formats that predefines a mobile telephone network unit, preferably a mobile telephony network control unit, according to UMTS a control unit of the radio network. Transfer formats, or transfer formats combined when there are a number or a large number of transfer channels on which the data from the logical channels are to be reproduced, are temporarily modified, that is to say extended or restricted by the mobile telephone network unit, ie by the control unit of the mobile telephone network, or by a UMTS base station, ie a Node --B. In other words, according to UMTS the mobile telephone network control unit or the UMTS base station can temporarily extend or restrict the set of transport formats set (Transport format set) or the set of combined transfer formats (Transport format combination set). This method corresponds to the network-side controlled scheduling known per se and described above. This network-side temporary preset of a base amount of transfer formats or combined transfer formats that can be used is used in accordance with the invention of predefined network-side selection criteria.

  It is clear that one aspect of the invention is to transmit on the network part of the selection of the transfer formats or the combined transfer formats using the scheduling known per se network side to check again (on the basis of these transfer formats or of these combined transfer formats possibly accepted in this "basic quantity" is already restricted or already extended) if the combined transfer formats or transfer formats in question are suitable for transmitting data. data under the control of the unit for controlling access to the medium. Compared to the state of the art, the invention no longer checks the transfer formats or combined transfer formats stored in the mobile radiotelephone terminal, namely their total quantity, to know their status and whether they can be used, but it starts from transfer formats or combined transfer formats, ie from their basic quantity already adapted to the temporary characteristics of the mobile telephony cells.

  Based on the transfer formats or on the combined transfer formats possibly authorized in a limited or extended network-side quantity, in accordance with the invention, the unit intended to control the access to the medium now checks whether the transfer or the combined transfer formats of this predefined quantity satisfy a selection criterion specific to the mobile telephone installation, for example to the maximum transmission power authorized in the mobile telephone installation, and from this quantity (which may also be considered, according to the internal criterion of the mobile telephone installation, as a possible transfer format or combined transfer formats possible for transmitting data) the unit intended to select formats For each Transmission Time Interval (TTI) a transfer format selects a transfer or s combined transfer formats to reproduce the data from the logical channel (s) on the transfer channel (s) based on the Medium Access Control Protocol (MSC) or sub protocol used.

  For stored transfer formats that a mobile base station declares temporarily admitted, we see that we check whether these transfer formats meet a selection criterion specific to the mobile phone installation. The transfer format used to transmit the data is selected exclusively from the transfer formats that satisfy the selection criterion specific to the mobile telephone installation.

  It will be pointed out that the invention can be implemented in any "media access control" protocol layer or in any "media access control" protocol sub-layer, for example also in a known RLC protocol layer. ; in this case the data to be transmitted from the buffers of the RLC protocol layer are selected to transmit the data in the transfer channels.

  The designs of the invention which will be described below concern both the unit intended to control access to the medium and the mobile telephone installation, as well as the method for reproducing the data to be transmitted from at least one logical channel. on at least one transfer channel. The described functionalities can be implemented in the mobile telephone installation either by software, that is to say by means of a special computer program, or by hardware, that is to say by means of a special electronic circuit, either in hybrid form in software part and partly in hardware; the various functions can be implemented by distributing them at will on the software and the hardware.

  According to a design of the invention, the unit for controlling access to the medium has a large number of priority queuing buffers, at least a portion of the queued buffer memories. priority being associated respectively with a priority value from which each of the data transmissions or each of the data selections to be transmitted from the buffers preferably takes place when the data is transmitted in the transfer channels. The unit for controlling access to the medium is designed in such a way that the data temporarily stored in the priority queues are read and transmitted according to the priority values and / or that the memories priority queue buffer are more or less filled. According to this design, it is further recommended that a unit for controlling the automatic repeat request for executing one or more automatic repeat request processes for transmitting the temporarily stored data into the priority queues, unit for controlling the automatic repetition request (preferably designed to execute one or more hybrid automatic repeat request processes) being adapted to transmit the temporarily stored data to the priority queue buffers.

  According to another design of the invention, the unit for controlling the automatic repetition request is designed to execute exactly an automatic repetition process by buffer with priority queues.

  By the above described designs of the invention, it is found that the unit for controlling access to the support preferably consists of an extended upstream unit for controlling access to the support designed according to the sub-unit. extended upstream protocol to control access to the medium.

  According to another design of the invention, the unit for controlling the automatic repetition request is designed to execute exactly an automatic repetition process by buffer with priority queues. According to this development of the invention, it is recommended that the media access control unit be designed to select exactly one transfer format for each automatic repetition request process.

  If the data is to be reproduced on a large number of transfer channels, a large number of transfer channels are selected, preferably in the form of combined transfer formats, that is, in this case the selection of as described above, combined transfer formats selected from a predefined quantity of combined transfer formats.

  In another design of the invention, one or more "automatic request for repetition" buffers are predicted, each of which is associated with one, preferably exactly one, automatic re-petition request process. It is recommended that exactly one buffer be associated with each automatic repeat request process. The unit for controlling the access to the medium is designed such that the transfer format or formats are selected according to whether the buffers "automatic request for repetition" are more or less fulfilled.

  This makes it possible to very flexibly control the selection of the data to be transmitted taking into account the actual physical conditions of transmission and that each of the buffers is more or less satisfied, which makes it possible to control in an optimized manner the transmission of data at the level of the data. the layer for controlling the access to the support.

  The selection criterion specific to the mobile telephone installation is preferably the maximum transmission power available on the mobile telephone installation, better still the maximum transmission power available in the transfer channel on the telephony installation. mobile, better still the maximum transmission power available in the transfer channel in the upstream direction extended on the mobile installation.

  By using this selection criterion, it is possible to select the data to be transmitted very specifically to the mobile telephone installation.

  According to another conception of the invention, it is provided that the unit for selecting the transfer format is designed in such a way that a predefined minimum quantity of transfer formats is associated with the transfer formats of which The unit for selecting the transfer format selects in step b) the transfer format used: to transmit the data. In other words, in each case a quantity of transfer formats (they correspond according to UMTS to the minimum set of transfer formats or Transport Minimum Format Set) are considered as transfer formats usable for transmitting the data. if the minimum set includes at least one transfer format.

  In this way, it is ensured that there is in all cases a transfer format for selecting and transmitting data in the layer intended to control access to the medium.

  According to another conception of the invention, the unit for selecting transfer formats is designed in such a way that it is verified whether the necessary transmission power is greater than that available in the mobile telephone installation. to transmit the data according to a transfer format included in the minimum quantity of transfer formats. In this case, a message generator unit designed to produce a first electronic message to be transmitted to the network unit is also provided in the unit for controlling access to the medium in the event that it is determined that a higher transmission power than is available or authorized in the mobile telephone installation is required to transmit the data according to a transfer format included in the minimum quantity of the transfer formats. . This message is preferably a Measurement Report message according to the UMTS communication standard.

  It will be pointed out that this aspect of the invention, namely producing and transmitting a measurement report message (by triggering and controlling it on the side of the mobile telephone installation) to the UMTS base station and / or to the control unit of the radio network, can be used independently of the method described above.

  The fact of producing on the terminal side and of transmitting by triggering a measurement report message to inform that the mobile telephone installation is in an "alarm situation" differs from the standard UMTS communication as currently envisaged. in that the message is no longer only produced and transmitted on request by the UMTS base station or by the control unit of the mobile telephone network but because of a predefinable event which occurs and which is determined in the mobile phone installation itself.

  In addition, there may be provided a message generation unit designed to produce a second electronic message to be transmitted to the network unit in case it is established in the operating step b) described above that no transfer format is available. available, the second message is preferably also a: measurement report message.

  The advantageous method for selecting transfer formats, in particular on the EDCH transfer channel according to the UMTS communication system, as well as the method for signaling that the power of the transmission system can be considered as a fundamental aspect of the invention. issue of a user device is overloaded. Thus, a method is defined for selecting a transfer format on the E-DCH transfer channel, taking into account HARQ (Hybrid Automatic Repeat Request) and Node-B techniques, that is to say of the UMTS base station, the controlled scheduling when selecting the data to be transmitted from the logical channel as part of the reproduction on the E-DCH transfer channel.

  Each of the E-DCH transfer formats is therefore subject to a two-step status check. Since the transfer formats are subject to these status checks, a transfer format may have one of the following states which will be explained in detail later: available state, restricted state ) or valid state.

  At the level of the RRC protocol layer, two new indicators are defined for the measurement report messages in order to show that the transmission power E-DCH in the user device is in overload condition, namely on the one hand to indicate the case where a transfer format among the minimum set of transfer formats requires a higher transmission power than that available at that moment in the mobile radiotelephone terminal and on the other hand to indicate the case where there is absolutely no transfer format that can be selected in the mobile phone installation.

  The mobile telephone installation is preferably designed as a mobile radiotelephone terminal particularly designed to send and receive data according to one or more protocols of a cellular mobile telephone system.

  It is particularly recommended that the mobile radio terminal is designed to communicate in a UMTS mobile telephone system, ie the mobile radio terminal is designed to send and receive data according to one or more protocols of a UMTS mobile telephone system.

  The figures show the invention in exemplary embodiments which will be explained in detail later. FIG. 1 shows a communication system according to an exemplary embodiment of the invention, FIG. 2 represents a protocol structure of the UMTS radio interface, FIG. 3 represents the units in a MAC sub-protocol layer. according to the invention in a first exemplary embodiment, represents the units in a MAC-e sub-protocol layer according to the invention in a second exemplary embodiment, is a state graph which represents the Possible states of a transfer format according to the invention in an exemplary embodiment, Fig. 6 is a flow chart showing the process steps for selecting one or more transfer formats according to the invention in an exemplary embodiment, FIG. 7 is a state graph which represents the states of transfer formas combined according to the state of the art and FIG. 8 is a graph of message flows which represents the manner of A measurement report message is requested and transmitted between a control unit of the mobile telephone network and a mobile radiotelephone terminal according to the state of the art.

  FIG. 1 shows a UMTS 100 mobile telephone system and, for the sake of simplicity of representation, in particular the components of the UMTS terrestrial radio access network (UMTS) mobile telephone access network network 4 equipped with FIG. a large number of mobile network subsystems (RNS) 101, 102 each of which is connected to the UMTS 105 core network (CN: Core network) using a so-called Iu 103, 104 interface. Each mobile telephone network subsystem 102, 103 comprises a mobile network control unit (RNC) 106, 107 and one or more UMTS base stations 108, 109, 110, 111 , also called Node-B according to UMTS.

  Within the mobile telephone access network, the control units of the mobile telephone network 106, 107 of each of the mobile telephone network subsystems 101, 102 are connected to each other by means of which an Iur 112 interface is called. Each control unit of the mobile telephone network 106, 107 monitors the manner in which the mobile telephone resources are associated with all the mobile telephone cells in a mobile telephone network subsystem 101, 102.

  Each of the UMTS base stations 108, 109, 110, 111 is connected by means of so-called Iub interfaces 113, 114, 115, 116 to a control unit of the mobile telephony network 106, 107 associated with the UMTS base station 108, 109, 110, 111.

  It can be seen that each UMTS base station 108, 109, 110, 111 supplies one or more mobile telephony cells (CE) by radio technology within a mobile network subsystem 101, 102. Between a station of UMTS base 108, 109, 110, 111 and user apparatus 118 (UE: User equipment), also referred to as mobile radio terminal, message signals or data signals are transmitted to a cell. mobile telephony via a radio interface, called Uu 117 radio interface according to UMTS, preferably according to a multiple access transmission method.

  According to the FDD mode (FDD: Frequency Division Duplex), the signals are transmitted in ascending and descending directions, for example, by allocating frequencies or frequency ranges separately in a corresponding manner. (In the upward direction, the signals are transmitted from the mobile radio terminal 118 to the respective UMTS base station 108, 109, 110, 111, in the downstream direction the signals are transmitted from each UMTS base station 108, 109, 110, 111 associated with the mobile radiotelephone terminal 118).

  Several users, that is to say several mobile radiotelephone terminals 118 activated or declared in the mobile telephone access network in the same mobile cell, are preferably separated from one another as to the signaling technique using codes. orthogonal, in particular according to the CDMA method (Code Division Multiple Access).

  It will be pointed out in this respect that only a single mobile radiotelephone terminal 118 is shown in FIG. 1 to simplify the representation. However, the mobile telephone system generally provides for any number of mobile radiotelephone terminals 118.

  The communication of a mobile radio terminal 118 may be established with another communication apparatus by means of an integral mobile telephone communication link with another mobile radiotelephone terminal or with a fixed network communication apparatus.

  As shown in FIG. 2, the UMTS radio interface 117 is logically subdivided into three protocol layers (symbolized in FIG. 2 by a protocol layer system 200). The units (entities) which provide and implement the functionality of each of the protocol layers described below are installed both in the mobile radio terminal 118 and in the UMTS base station 108, 109, 110, 111 or in each control unit of the mobile telephone network 106, 107.

  Figure 2 shows the protocol structure 200 from the dedicated channel (DCH) viewpoint.

  The lower layer represented in FIG. 2 is the physical layer PHY 201 which represents the protocol layer 1 according to the OSI (Open System Interconnection) reference model according to ISO (International Standardization Organization).

  The protocol layer placed above the physical layer 201 is the data link layer 202, the protocol layer 2 according to the OSI reference model; it has several protocol sublayers, namely the MAC protocol layer 203 (MAC: Medium Access Control), the RLC protocol layer 204 (RLC: Radio Link Control) PDCP 205 (Packet Data Convergence protocol PDCP) and BMC (Broadcast-Multicast Control).

  The upper layer of the UMTS Uu radio interface is the mobile telephony network layer (Cole 3 proto layer according to the OSI reference model) provided with the unit for controlling the mobile telephony resources 207 (layer RRC Protocol: Radio Resource Control).

  Each protocol layer 201, 202, 203, 204, 205, 206, 207 provides its services to the protocol layer above it through certain service access points (Service Access Points). ) predefined.

  To better understand the protocol layer architecture, the service access points have clear and commonly used names such as, for example, the logical channels 208 between the MAC protocol layer 203 and the RLC protocol layer 204. , the transfer channels 209 between the physical layer 201 and the MAC protocol layer 203, the radio bearer (RB) 210 between the RLC protocol layer 204 and the PDCP protocol layer 205 or the BMC protocol layer 206 as well as the signaling radio bearer (SRB) 213 between the RLC 204 protocol layer and the RRC 207 protocol layer.

  According to UMTS, the protocol structure 200 shown in FIG. 2 is not only horizontally subdivided into protocol layers and units (described above) in each of the protocol layers but also vertically in that a control level 211 (Control Plane, C-plane) which contains parts of the physical layer 201, parts of the MAC protocol layer 203, portions of the RLC protocol layer 204 and the layer is called protocol RRC 207 and the user level 212 (User Plane, U-plane) which contains portions of the physical layer 201, portions of the MAC protocol layer 203, portions of the RLC protocol layer 204, the PDCP protocol layer 205 as well as the BMC protocol layer 206.

  The units of the control level 211 exclusively allow to transmit control data necessary to establish, to cut and to maintain a communication link; on the other hand, the units of the level of the user 212 make it possible to transport the useful data themselves.

  Document (1) gives details of the protocol layer system 200.

  Each protocol layer or each unit (entity) of a given protocol layer has certain predefined functions as part of a mobile communication.

  On the transmitter side, the physical layer 201 or the uni-tees of the physical layer 201 have the function of surely transmitting data coming from the MAC protocol layer 203 via the radio interface 117. In this connection, the data is reproduced on physical channels (not shown in Figure 2). The physical layer 201 offers its services to the MAC protocol layer 203 via transfer channels 209 which make it possible to determine how to transport the data and according to which characteristics to transport them via the radio interface 117. The functions The main elements that the uni-tees must provide to the physical layer 201 are channel coding, modulation and spreading of the CDMA code. Correspondingly, the physical layer 201 or physical layer entities 201 support the CDMA code squeeze, demodulation, and decoding of the received data on the receiving side and transmit it to the MAC protocol layer 203 so that continues to treat them.

  Using logical channels 208 serving as access points to the service, the MAC protocol layer 203 or the units of the MAC protocol layer 203 provide their services to the RLC protocol layer 204 which characterizes which type. of file are the data transported. The MAC protocol layer 203 in the transmitter, i.e. when the mobile radiotelephone terminal 118 transmits data upstream, has the particular function of reproducing on the transfer channels 209 of the physical layer 201 the data which are on a logical channel 208 above the MAC protocol layer 203. The physical layer 201 provides for this purpose discrete transmission rates to the transfer channels 209. The MAC protocol layer 203 or the In the case of transmission, the MAC protocol layer 203 in the mobile radiotelephone terminal 118 has the crucial function of selecting a transfer format (TF) adapted for each configured transfer channel, as a function of the rate at which the data is transmitted. then transmitted and the priority (as to the data) logical channels reproduced on the transfer channel 209 in question as well as the transmission power available on the terminal radiotelephone mobile onique 118 (UE). Among other things, it is determined in a transfer format how much of the MAC data packet units, called transfer blocks, are sent, in other words, to the physical layer 201 per transmission time interval TTI (Transmission Time Interval). transfer channel 209. When a communication link is established, the control unit of the mobile telephone network 106, 107 signals to the mobile radio terminal 118 the authorized transfer formats and the combined transfer formats authorized on the different transfer channels 209. In the receiver, the units of the MAC protocol layer 203 again distribute the transfer blocks received on the transfer channels 209 over the logical channels 208.

  The MAC protocol layer or the units of the MAC protocol layer 203 usually have three logical units. The unit called MAC-d (MAC dedicated) processes useful data and control data that is reproduced on specialized DC (Dedicated Channel) transfer channels via dedicated logical channels DTCH (Dedicated Traffic Channel). ) and the corresponding DCCH (Dedicated Control Channel). The MAC-c-sh (MAC Control-shared) unit processes the user data and the control data from the logical channels 208 and reproduced on the common transfer channels 209, such as, for example, the service channel. Random access channel (RACH) common transfer in upstream direction or the forward FACH (forward access channel) common transfer channel. The MAC-b (MAC Broadcast) unit only processes the relevant system information for the mobile telephony cells and is reproduced on the BCH (broadcast channel) via the logical channel BCCH (Broadcast Control Channel) and are transmitted for each broadcast to all mobile radiotelephone terminals 118 in the mobile cell concerned.

  The RLC protocol layer 204 or the units of the RLC protocol layer 204 provide the RRC 207 protocol layer with their services using the signaling radio bearer (SRB) 213 serving as a point of reference. access to the network and to the PDCP protocol layer 205 as well as to the BMC protocol layer 206 using the radio bearer (RB: Radio Bearer) 210 serving as the access point to the network. Signaling radio bearers and radio bearers characterize what the RLC 204 protocol layer must do with data packets. The protocol layer RRC 207 determines, for example, for this purpose the transmission mode for each signaling radio bearer or each radio bearer.

  According to UMTS, the following modes of transmission are provided: transparent mode (TM: transparent mode), - unacknowledged mode (UM) or - acknowledged mode (AM).

  The RLC protocol layer 204 is modeled such that there is a particular RLC entity for each radio bearer or radio signal bearer. In the transmission direction, the RLC protocol layer or its entities 204 also has the function of distributing or gathering in a packet the user data and the signaling data coming from the radio bearers or radio signaling supports. The RLC protocol layer 204 transmits the data packets, obtained by division or collection, to the MAC protocol layer 203 so that it continues to transport or process them.

  The PDCP layer 205 or the PDCP 205 protocol layer units are designed to transmit or receive data from so-called packet switched domains (PS: Packet Switched). The main function of the PDCP 205 protocol layer is to compress or decompress the information of the Internet Protocol (IP) header.

  The BMC protocol layer 206 or its entities are used to transmit or receive so-called cell broadcast messages via the radio interface.

  The RRC protocol layer 207 or the entities of the RRC protocol layer 207 have the role of establishing, deleting or reconfiguring the physical channels, the transfer channels 209, the logical channels 208, the signaling radio bearers 213 and the radio bearers 210 as well as negotiating all the parameters of the protocol layer 1, that is to say the physical layer 201 and the protocol layer 2. To achieve this, the RRC units, that is, to say the units of the RRC protocol layer 207 in the control unit of the mobile telephone network 106, 107 and the mobile radio terminal 118 concerned, exchange corresponding RRC mes-sages via the radio signaling supports 213. Document (3) gives the details of the RRC layer.

  As described above, at the RRC level the mobile radio terminal 118 can communicate to the control unit of the mobile telephone network 106, 107 which is associated with it information concerning the performance of the data traffic on a radio channel. transfer (so-called measurement reporting messages) for the purpose of managing mobile phone resources. The unit intended to control the serving mobile radio network (Serving Radio Network Controller) is then indicated in what proportion the data buffer is occupied in the transfer channel concerned, i.e. it is indicated how many data are momentarily in the RLC buffers of the mobile radio terminal 118.

  This information then enables the unit for controlling the mobile telephone network 106, 107 to configure the mobile radio terminal 118 correspondingly to restrict or increase, for example, the usable transfer formats of a mobile telephone network. mobile radio terminal 118 or to perform a handover to another mobile cell, to reconfigure the specialized physical channels or to change the RRC state from a first state CELL-DCH to a second state CELL FACH.

  The 3-GPP Standardization Committee is currently working to improve packet data transmission via upstream dedicated transfer channels for UMTS FDD mode.

  In this respect, in the exemplary embodiments, the invention provides a specialized transfer channel under the name of extended DCH (Enhanced DCH: E-DCH). The main properties of this new transfer channel are the application of a HARQ (Hybrid Automatic Repeat Request) process which derives from the 1 1-channel standby and standby process and consists of that a UMTS base station performs a controlled scheduling and to provide frame lengths less than or equal to 10 ms. The HARQ transmission security method allows the network to transmit to the mobile radio terminal 118 a confirmation that the data has been received correctly or not. To perform this function, the mobile radio terminal 118 contains different buffers for temporarily storing the data until it has been confirmed that they have been correctly received. It is further planned to distribute the data according to their priority in different buffers, called priority queues; the data are temporarily stored in the buffers according to their importance, that is to say assigned priorities, and they are therefore treated more or less quickly after their temporary storage in each of the buffer with a predetermined priority.

  The two functions are implemented in a new sublayer of the MAC protocol layer 203, ie, the MAC-e 300 (MAC-e: MAC extended upstream) sublayer as shown in FIG. FIG. 3 according to a first embodiment, which is implemented at the same time on the terminal side, that is to say in the terminal 118, and on the network side, that is to say in a station The MAC-e 300 protocol sub-layer obtains its data from the MAC-d protocol sublayer via so-called MAC-d 301 streams. , 302 and it transmits its data back to the physical layer 201 via the E-DCH transfer channel 303.

  One of the main functions that the MACe protocol sublayer performs in the user apparatus 118 is to order the data for the upstream direction (uplink communication link) using a method for selecting a transfer format, that is, to select a transfer format adapted for the transfer channel EDCH at certain predefined times according to the momentarily authorized transmission rates and / or the priority assigned to the data to be transmitted and / or the power of the transmission. available in the E-DCH transfer channel.

  The MAC-e 300 protocol sub-layer or its entities communicate, for example to be able to configure it, with the RRC protocol layer 207 via the MAC control access point 304.

  In the MAC-d protocol sublayer, one or more logical channels are multiplexed on a MAC-d stream 301, 302, a priority being associated with each MAC-d stream 301, 302 in the MAC protocol sub-layer. d; this priority allows the "priority queue distribution" function, implemented in a priority queuing distribution unit 305 in the MAC-e 300 protocol sub-layer, to distribute the data in the buffers 306 whose priorities are different, that is to say to process in a different buffer the data whose priority is different, the data of a certain priority are then temporarily stored in a certain buffer memory .

  As shown in FIG. 3, it is possible to permanently associate the priority queue 306 with a MAC-d stream 301, 302, and for each MAC-d stream a defined number of priority queues 306 is obtained. .

  According to a second embodiment shown in FIG. 4, a defined number of priority queues 306 is defined globally for all MAC-d streams 301, 302 in the MAC-e protocol sub-layer 30. In this case, identical priority data from different MAC-d streams may be stored temporarily in a priority queue 306.

  In the priority queue buffer 306, the data is then temporarily stored until requested by a HARQ unit 307 for transmission.

  According to the HARQ stop and wait method with N channels, the HARQ unit 307 has a number N of processes called HARQ, each of which represents an occurrence of the stop and hold process. At each HARQ process, the HARQ unit 307 takes a number of packet data units (Protocol Data Units, PDUs) in the priority 306 queue queues. of their priority and transmits them via the E-DCH transfer channel to the physical layer 201 where they are then transmitted to the network via specialized physical workflows via the radio interface 117.

  The HARQ unit 307 stores in a corresponding HARQ buffer (not shown) the transmitted packet data units for each HARQ process until the network confirms that the transmission has been successful.

  Positive confirmation occurs by a positive confirmation message (ACK). If it has not been possible to carry out a correct transmission, ie if the data are not received correctly, a negative confirmation message (NACK) is received after which the data is sent again by the user. mobile radiotelephone terminal 118 at the UMTS base station 108, 109, 110, 111.

  The following types of HARQ method 20 are distinguished with respect to the HARQ retransmission type.

  Fully synchronous HARQ method - In this type of HARQ process, the new transmission (retransmission) takes place to the same HARQ process as the first data transmission.

  Partially Asynchronous HARQ Method - As in the fully synchronous variant, in this type of HARQ method the retransmission can take place to the same HARQ process as the first data transmission. This variant however makes it possible not to launch a retransmission. However, it is not possible to transfer data for other HARQ processes.

  Fully asynchronous HARQ method - In this type of HARQ method, the retransmission can be sent to any HARQ process regardless of the HARQ process during the first data transmission.

  A unit for selecting transfer formats 308 and coupled to the HARQ unit 307 is responsible for selecting the transfer format suitable for transmission for each HARQ process.

  A number of different transfer formats are configured for this purpose in the MAC-e 300 protocol sublayer using the RRC protocol layer; among them the unit for selecting transfer formats 308 selects one that is suitable for each transmission time interval (TTI) and for each HARQ process.

  The MAC-e protocol sublayer is set by the control unit of the mobile telephone network 106, 107 using the RRC protocol layer.

  The transfer format used each time is selected according to the momentarily authorized transmission rate, the priority of the data to be transmitted as well as the transmission power available in the mobile radio terminal: 1.18 for the transfer channel E -DCH concerned.

  In this case, the momentarily authorized transmission rate is controlled by the UMTS base station 108, 109, 110, 111. This is why this type of controlled scheduling is also called Node-B. The control is that the UMTS base station 108, 109, 110, 111 temporarily restricts or extends, depending on the momentary situation of the traffic in the mobile telephone cell, the transfer formats used by the mobile radio terminal 118 among the number of transfer formats defined for the E-DCH transfer channel.

  In the following, we explain in detail how to select the transfer formats used as part of the MAC-e protocol sublayer.

  The method is performed by the unit for controlling access to the medium in the "media access control" protocol layer 203.

  As shown in flow chart 600 in Fig. 6, after it has started (step 601), the method begins with a first step (step 602) where the state of the different transfer formats within the Set of Transport Format Set (Transport Format Set) formats configured for the E-DCH transfer channel are checked once for each HARQ process at one or more given times.

  Based on the first status check, one of the following states is assigned to each transfer format 501, ie each transfer format 501 can be in one of the following two states at the beginning of the process (see status graph 500 in Figure 5). a first state 502 "available state" or a second state 503 "restricted state".

  In this regard, it is verified which transfer formats 501 are temporarily restricted because of the Node-B controlled scheduling. In other words, it is checked whether the UMTS base station 108, 109, 110, 111 temporarily restricts the use of the transfer formats 501 or authorizes their use.

  All transfer formats 501 whose use is not temporarily restricted by the UMTS base station 108, 109, 110, 111 are in the first state 502 "available state". All other transfer formats 501, that is, transfer formats 501 whose UNIS base station 108, 109, 110, 111 has temporarily restricted use, are in the second state 503 "restricted state" ".

  As shown in FIG. 6, the state of each of the transfer formats which is in the first state 502 "available state" is then checked in step 603 a second time.

  The second status check consists of a power evaluation based on the momentary transmit power in the E-DCH transfer channel and on the maximum available transmit power in the E-DCH transfer channel.

  A third state 504 "valid state" shown in FIG. 6 by step 604 is associated with all the transfer formats which are in the first state 502 "available state" and require a transmission power lower than the power of the transmitter. maximum emission provided by the mobile radio terminal 118 to the E-DCH transfer channel.

  If the transfer format checked in step 603 is a transfer format of a minimum quantity containing transfer formats that the mobile radio terminal 118 must provide in all cases, then according to UMTS a transfer format included in "the minimum set of transfer masters", the third state 504 "valid state" is associated anyway with this transfer format, regardless of the result of the second state check in step 603 ( verification step 605).

  The reason for this is that according to the invention in these exemplary embodiments, neither the scheduling controlled by the UMTS base station nor the second state checking at step 603 should restrict the manner in which the radiotelephone terminal Mobile 118 uses the transfer formats of the "minimum set of transfer formats".

  For transfer formats that require transmission power greater than the maximum transmit power available in the E-DCH transfer channel, check step 605 is then checked whether this transfer format is part of the minimum quantity, that is to say the minimum set of transfer formats. If it is not, this transfer format remains in the first state 502 "available state" (step 606).

  The process is then completed for this transfer format (step 607).

  If it is established in step 605 that the transfer format is part of the minimum quantity, i.e. the minimum set of transfer format, and that it requires a higher transmission power at the maximum transmission power available for the E-DCH transfer channel, a measurement report message with the indicator "the minimum set of transfer formats is violated" is sent; this message is generated by a message generating unit (not shown) in the unit for controlling access to the medium and is transmitted to the UMTS base station 108, 109, 110, 111 and / or the unit The mobile radio terminal 118 signals in this manner to the control unit of the mobile telephone network 106, 107 that the transmission power of the transfer channel E-DCH is in a position to control the mobile telephone network 106, 107. This signaling does not require the control unit of the mobile telephone network 106, 107 to previously request a measurement report message. This information makes it possible, if necessary, for the control unit of the mobile telephone network 106, 107 to configure the mobile radiotelephone terminal 118 in a suitable manner, for example to reconfigure the quantity of transfer formats that may be authorized or the channels. The mobile radio terminal 118 has its specialized physical characteristics, that is to say, to restrict them if necessary or even to perform an intercell transfer to another mobile telephone cell (step 608).

  After step 604 or step 608 has been executed, another verification step (step 609) is checked whether a transfer format is associated with the third state 504 "valid state" or whether the quantity of the transfer formats in this state is zero.

  In other words, it is checked at this step if there is even one authorized transfer format that can be selected to transmit the data, in particular to reproduce data from at least one logical channel on one or more transfer channels.

  If not, that is, if transfer formats are in the third state 504, the method for selecting transfer formats using the unit to select Transfer formats 308 only takes into account the transfer formats that are in the third state 504 "valid state", as shown in Figure 3 and as explained later in more detail. In other words, in the unit for controlling access to the uplink medium the unit for selecting transfer formats 308 selects from the transfer formats which are in the third state 504 "valid state" a transfer format adapted according to the following criteria: - the filling levels in the HARQ buffers in the HARQ unit 307 and - the priority and the filling levels in the different priority queues (step of 610).

  When the transfer format has been correctly selected in step 610, the selection process ceases (step 611) and the data is transmitted to the physical layer 201 according to the selected transfer format via the transfer channel E-DCH 303.

  If the HARQ buffer of the corresponding HARQ process is full, the retransmission is in principle always executed at a higher priority than the transmission of the data from the priority queues 306. This applies to the synchronous HARQ method or the method partially asynchronous HARQ retransmission In the case of the fully asynchronous HARQ retransmission method, the HARQ buffers of all the HARQ buffers are evaluated and, if at least one of these HARQ buffers is full, its retransmission is preferred over the data from the queues. priority waiting 306.

  Depending on the selected transfer format, the unit for selecting transfer formats 308 takes the equivalent amount of data (MAC-d Protocol Data Units, PDUs) in the queue buffers. in the HARQ buffers and retransmits them through the E-DCH transfer channel to the physical layer 201 from which they are then transmitted to the network through the dedicated physical channels via the radio interface, in particular to the UMTS base station 108, 109, 110, 111 respectively responsible and from there to the desired receiver.

  If it has been established in the verification step 609 that there is no transfer format allowed and therefore no transfer format to select, so that no transfer format of a "minimum set of transfer "is defined within the set of transfer formats and therefore the quantity of the transfer formats that are in the third state 504" valid state "is zero, in step 612 the unit message generator not shown launches a measurement report message with the flag "the set of valid transfer formats is violated" which is transmitted to the UMTS base station 108, 109, 110, 111 and / or the control unit of the mobile telephone network 106, 107, which makes it possible to inform it that there is no authorized transfer format in the mobile radiotelephone terminal 118.

  Then the process ends at a step 613.

  The method described above is then executed again for the following HARQ process during which the procedure of selecting the transfer format starts directly with the second status check, ie the step 602 is no longer executed for the next HARQ process; this results in a substantial economy of calculation.

  If the scheduling controlled by the UMTS base station changes the amount of the restricted transfer formats, the procedure which selects the transfer format according to Fig. 6 is continued again by the first status check at the same time. step 602.

  In a first exemplary embodiment, it will be assumed that the mobile radio terminal 118 sends data in packets via the specialized E-DCH transfer channel to the UTRAN mobile access network and in the latter in particular to the station. Basic UMTS 108, 109, 110, 111 which is responsible for the mobile radiotelephone terminal 118.

  Assume a transmission scenario in which the mobile telephone user and therefore the mobile radio terminal 118 uses at the same time three packet services in the upstream direction of the data transmission, according to this exemplary embodiment a packet service interactive game on the Internet, a packet service for downloading text files and a packet service for broadcasting video data.

  When the communication link is established between the mobile telephone network and the mobile radiotelephone terminal 118, configuration messages are sent to the mobile radio terminal 118 using the RRC protocol layer unit. are implemented both in the mobile telephone terminal 118 and in the control unit of the RNC mobile telephone network 106, 107 and allow the RRC protocol layer in the mobile radio terminal 118 to configure the protocol layers located below for their control parameters.

  It is assumed from FIG. 4 that a MAC-e 300 protocol sub-layer comprises three priority queues 306 in which the MAC-d protocol data of the first MAC-d 301 and the second MAC-d stream 302 are passed from the MAC-d protocol sublayer to the MAC-e 300 protocol sub-layer and are temporarily stored in the MAC-e 300 protocol sub-layer based on their priority in one of the buffers priority queues associated with the priority queues 306.

  An E-DCH transfer channel is further configured using the following amount of transfer formats from which the unit for selecting transfer formats 308 must select a transfer format adapted to each transmission time interval ( TTI) and each HARQ process: TF 0 = 0 * 1,000 bits, TF 1 = 1 * 1,000 bits, TF 2 = 2 * 1,000 bits, TF 3 = 3 * 1,000 bits, TF 4 4 * 1,000 bits, TF 5 6 * 1000 bits, - TF 6 = 8 * 1000 bits and TF 7 = 10 * 1000 bits.

  The amount of the configured transfer formats is stored in unrepresented transfer format memory of the MAC-e 300 protocol sub-layer.

  It is assumed that the scheduling controlled by Node-B temporarily limits the use of the transfer formats TF5, TF6 and TF7, that is to say that they are not authorized in the mobile radiotelephone terminal 119. It is assumed that in addition that in this embodiment the unit for controlling the mobile telephone network 106, 107 has defined a "minimum amount of transfer formats" that must be provided in all cases the mobile radio terminal 118, that is to say a "minimum set of transfer formats" consisting of TFO, TF1 and TF2 transfer formats.

  It is assumed that the HARQ method is a fully synchronous retransmission method and that four HARQ processes each of which has an HARQ buffer are configured in the HARQ unit 307. In the following procedures for selecting transfer formats, it is assumed that the memories HARQ buffer are empty and we start by transmitting the data using the first HARQ process. In this case, the unit for selecting transfer formats 308 performs the following steps in the MAC-e 300 sub-layer 300.

  Initially, the different transfer formats are subjected to a first state check within the set of transfer formats configured for the E-DCH transfer channel (step 602).

  Based on the first status check, the following transfer formats are in the first state 502 "available state": TFO, TF1, TF2, TF3, TF4. The following transfer formats are in the second state 503 "restricted state": TF5, TF6, TF7.

  Then at step 603 as described above, all transfer formats that are in the first state 502 "available state" are subjected to a second state check.

  It is assumed from this embodiment that all transfer formats that are in the first state 502 "available state" require to transmit the data a transmission power less than the maximum transmission power E-DCH available in the mobile radiotelephone terminal 118, so that in step 604 all these transfer formats TFO, TF1, TF2, TF3, TF4 are associated with the third state 504 "valid state".

  Verification step 609 is checked whether the amount of transfer formats that are in the third state 504 "valid state" is zero.

  If it is not the case, as described above, since it is moreover accepted that the HARQ buffer of the first process HARQ is empty, in step 610 the unit intended to select transfer formats 308 then selects a suitable transfer format from the quantity of the transfer formats which are in the third state 504 "valid state", according to the priority and fill level of the three priority queues 306.

  In this embodiment, it is further assumed that only the buffer of the first priority queue A is full and that its quantity corresponds to the transfer format TF4. Therefore, the unit for selecting transfer formats 308 selects the transfer format TF4, it takes in equivalent amount of MAC-d protocol data units in the buffer of the first priority queue A and it routes them via the transfer channel E-DCH 303 to the physical layer 201 from which they are then transmitted to the UMTS base station 108, 109, 110, 111 via the dedicated physical channels. through the radio interface.

  For the following HARQ process, the procedure for selecting transfer formats continues directly by the second state check at step 603.

  As described above, the invention provides in particular the following advantages.

  A method is disclosed for the E-DCH transfer channel for selecting advantageous transfer formats according to which the UMTS base station has a considerably lower computing load when the mobile telephone terminal 118 selects the transfer format. because the process has two stages and the authorized transfer formats are restricted or temporarily extended.

  When the transmission power E-DCH in the mobile telephone terminal 118 is overloaded, it is signaled to the network at the RRC protocol layer, so that the mobile network can effectively manage the resources. in mobile telephony using this information.

  According to the invention in these exemplary embodiments, it is expected that the priority queues have different definitions.

  As shown in FIG. 3, each priority queue 306 is durably associated with a MAC-d stream 301, 302 and there is for each MAC-d stream N priority queues 306 for the different priorities. In this case, N corresponds to the number of priorities that the logic channels 208 multiplexed on the MAC-d stream concerned.

  According to another solution, it is also possible, as shown in FIG. 4, for each priority queue 306 to be able to receive data from all the MAC-d streams 301, 302 and in this case N queues are obtained. 306 priority wait for MAC-d streams globally. In this case, N corresponds to the number of different priorities that logical channels 208 multiplex on the MAC-d stream.

  In the priority queues 306 according to a third different solution, it is expected that there is a priority queue for each traffic class defined. As shown in FIG. 4, there are N priority waitings 306 for all MAC-d streams 301, 302 globally. In this case, N corresponds to the number of traffic classes, for example N = 4 in the case where four classes of talk traffic "," broadcast "," interactivity "and" background "have been defined.

  In this case, the MAC-d protocol sub-layer communicates information concerning the priorities of the logical channels 208 multiplexed on a MAC-d stream at the MAC-e 300 protocol sub-layer; thanks to them, the priority queuing distribution unit 305 in the MAC-e protocol sublayer 300 then distributes the data among the different priority queues 306.

  This document cites the following publications: (1) 3-GPP TS 25 301, Technical Specification, Third Generation Partnership Project, Technical Specification Group Radio Access Network, Radio Interface Protocol Architecture (Technical Specification, Third Generation Partnership Project, Group Technical Specification Radio Access Network, Radio Interface Protocol Architecture) (2) RP-040 0081, Proposed Work Item on FDD Enhanced Uplink, 23rd TSG-RAN Conference, Phoenix (United States), 10-12 March 2004 (3) 3-GPP TS 25 331, Technical Specification, Third Generation Partnership Project, Technical Specification Group Radio Access Network, RCC Protocol Specification (Technical Specification, Third Party Partnership Project) Generation, Technical Specification Group Radio Access Network, RCC Specification) (4) 3-GPP TS 25 321, Technical Specification, Third Generation Partners Technical Specification, Third Generation Partnership Project, Technical Specification Group Radio Access Network, Specification of the MAC Protocol: Access Control support) (5) 3-GPP TS 25,133, Technical Specification, Third Generation Partnership Project, Technical Specification Group Radio Access Network, Requirements for Support of Radio Resource Management (FDD) (Technical Specification, Third Generation Partnership Project, Requirements for acceptance of FDD radio resource management) (6) EP 1 341 318 A2 (7) WO 2001/47146 A1 (8) WO 2002/23 936 A1 (9) WO 99/43178 A1 (10) WO 2004/059 869 A1 (11) US 2003/0 193 913 Al (12) US 2003/0 092 382 Al (13) 2003/0153 313 A1 (14) 2004/0 028 078 A1 (15) WO 03 / 001 681 Al Mobile phone system reference list 101 mo phone network subsystem bile 102 cellular network subsystem 103 interface Iu 104 interface Iu main mobile network 106 unit for controlling the mobile telephone network 107 unit for controlling the mobile telephone network 108 base station UMTS 109 base station UMTS base station UMTS 111 base station UMTS 112 interface Iur 113 interface Iub 114 interface Iub interface Iub 116 interface Iub 117 interface Uu 118 mobile radiotelephone terminal protocol layer 201 physical layer 202 data link layer 203 MAC protocol layer 204 RLC protocol layer 205 PDCP protocol layer 206 BMC protocol layer 207 RRC protocol layer 208 logical channel 209 transfer channel 210 radio bearer 211 level of control 212 user level 213 radio signaling support 300 sub-layer of MAC-e protocol 301 stream MAC-d 302 stream MAC-d 303 transfer channel E-DCH 304 access point to ser MAC control vice 305 unit to allocate priority queues 306 priority queue 307 HARQ unit 308 unit to select transfer formats 500 status graph 501 transfer format 502 first state "available state "503 second state" restricted state "504 third state" valid state "600 flow chart 601 start 602 process step 603 verify step 604 process step 605 verify step 606 process step 607 end 608 process step 609 verify step 610 process step 611 end 612 operation step 613 end 700 status graph 701 first state "enabled state" 702 second state "power state exceeded" 703 third state "state off" 704 state transformation 705 state transformation 706 state transformation 800 message flow chart 801 unit intended to control the mobile phone network 802 message d request for measurement control 803 mobile radiotelephone terminal 804 measurement report message

Claims (19)

  A unit for controlling access to the medium in a mobile telephone installation adapted to reproduce, with the aid of the mobile telephone installation, data to be transmitted from at least one logical channel (208) to at least one transfer channel (209), characterized in that it comprises at least one transfer format memory for storing several transfer formats, a transfer format comprising control parameters according to which the unit intended to controlling access to the medium reproduces data from the at least one logical channel (208) on the at least one transfer channel (209), at least one unit (308) for selecting transfer formats for selecting a transfer format to use from the large number of stored transfer formats, the unit for selecting transfer formats is designed a) to check whether the stored transfer formats that satisfy a selection criterion predefined by a mobile telephone network unit meets a selection criterion specific to the mobile telephony installation and (b) so that the transfer format used to reproduce the data on the least one transfer channel (209) is selected from the transfer formats that satisfy the selection criterion specific to the mobile telephone installation.   2. A unit for controlling access to the medium according to claim 1, characterized in that it comprises a large number of priority queuing buffer memories, at least one priority value being respectively associated with a portion of the priority queue buffers and - the unit for controlling access to the medium is designed such that data temporarily stored in the priority queues are read and transmitted according to the priority values and / or that the priority queues are more or less satisfied.   A unit for controlling access to the medium according to claim 2, characterized in that it comprises a unit for controlling the automatic repetition request to execute one or more automatic repetition request processes for transmitting the data. temporarily stored in the priority queue buffers. 2.0   A media access control unit according to claim 3, characterized in that the unit for controlling the automatic repetition request is adapted to execute one or more automatic repetition request processes for transmitting the stored data. temporarily in priority queue buffers.   A unit for controlling media access according to claim 3, characterized in that the unit for controlling the automatic repetition request is designed to execute exactly one automatic buffer re-petition request process. priority queues.   A media access control unit according to claim 3, characterized in that it is designed to select exactly one transfer format for each automatic repeat request process.   7. Unit for controlling access to the medium according to claim 6, characterized in that it comprises - one or more buffers "automatic request for repetition", each of them being associated with an automatic request process of repetition, the unit for controlling the access to the medium being designed in such a way that the transfer format or formats are selected according to whether the "automatic request for repetition" buffers are more or less fulfilled.   A unit for controlling access to the medium according to claim 1, characterized in that it is designed as a unit for controlling access to the medium in an extended upstream sub-protocol layer for the unit intended to to order access to the support.   11. A unit for controlling access to the medium according to claim 1, characterized in that the selection criterion predefined by the mobile telephone network unit is a quantity of network-authorized transfer formats.   12. Unit for controlling access to the medium according to claim 1, characterized in that the selection criterion predefined by the mobile telephone network unit is a selection criterion predefined by a mobile telephone base station.   11. Unit for controlling the access to the medium according to claim 1, characterized in that the selection criterion specific to the mobile telephony installation is the maximum transmission power available on the mobile telephone installation.   12. Unit for controlling the access to the medium according to claim 11, characterized in that the selection criterion specific to the mobile telephone installation is the maximum transmission power available in the transfer channel on the installation of mobile telephony.   Device for controlling access to the medium according to claim 8, characterized in that the selection criterion specific to the mobile telephone installation is the maximum transmission power available in the extended upstream transfer channel. the mobile phone installation.   14. A unit for controlling access to the medium according to claim 1, characterized in that the unit (308) for selecting the transfer format is designed in such a way that a predefined minimum quantity of transfer formats is associated with the transfer formats among which the unit for selecting the transfer format selected in step b) the transfer format used to transmit the data.   A media access control unit according to claim 14, characterized in that the unit (308) for selecting transfer formats is designed in such a way that it is checked whether the necessary transmission power is required. is greater than that available in the mobile telephone installation for transmitting the data according to a transfer format included in the minimum quantity of transfer formats and including a message generating unit designed to produce a first electronic message to be transmitted. - to the network unit in the event that it is determined that a higher transmission power required than is available in the mobile telephone installation is required to transmit the data according to a transfer format included in the minimum quantity of transfer formats.   A media access control unit according to claim 15, characterized in that the message generating unit is designed such that the first electronic message formed is a measurement report message.   17. A unit for controlling the access to the medium according to claim 1, characterized in that it comprises a message generating unit designed to produce a second electronic message to be transmitted to the network unit in the event that it is established. in step b) no transfer format is available for selection.   18. A unit for controlling access to the medium according to claim 17, characterized in that the message generator unit is adapted to produce the second electronic message as a measurement report message.   Mobile telephone installation characterized in that it comprises a unit for controlling access to the medium according to claim 1.   20. A method for reproducing, with the aid of a mobile telephone installation, data to be transmitted from at least one logical channel to at least one transfer channel in a "bearer access control" protocol layer. mobile telephone installation, characterized in that a) checking whether the stored transfer formats which satisfy a selection criterion predefined by a unit of the mobile telephone network satisfy a selection criterion specific to the mobile telephone installation. , a transfer format being provided with control parameters which make it possible to reproduce the data coming from the at least one logical channel on the at least one transfer channel by the unit intended to control access to the medium and b) the transfer format used to reproduce the data on the at least one transfer format is selected from the transfer formats which satisfy the selection criterion specific to the mobile phone installation.