WO1997038546A1 - Kanalwechselsteuerung eines in einem isdn-system eingebundenen dect-spezifischen rll/wll-teilsystem - Google Patents
Kanalwechselsteuerung eines in einem isdn-system eingebundenen dect-spezifischen rll/wll-teilsystem Download PDFInfo
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- WO1997038546A1 WO1997038546A1 PCT/DE1997/000689 DE9700689W WO9738546A1 WO 1997038546 A1 WO1997038546 A1 WO 1997038546A1 DE 9700689 W DE9700689 W DE 9700689W WO 9738546 A1 WO9738546 A1 WO 9738546A1
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- request
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
- H04Q11/0435—Details
- H04Q11/0457—Connection protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/098—Mobile subscriber
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/298—Loop or ring system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
- H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
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- 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]
- H04W84/10—Small scale networks; Flat hierarchical networks
- H04W84/14—WLL [Wireless Local Loop]; RLL [Radio Local Loop]
Definitions
- transmitting and receiving devices are used for message processing and transmission, in which
- message processing and message transmission can take place in a preferred transmission direction (simplex operation) or in both transmission directions (duplex operation),
- FDMA Frequency Division Multiple Access
- TDMA Time Division Multiple Access
- CDMA Code Division Multiple Access
- Message is a superordinate term that stands for both the meaning (information) and the physical representation (signal). Despite the same meaning of a message - ie the same information - different signal forms can occur. So z. B. a message relating to an object (1) in the form of an image,
- the type of transmission according to (1) ... (3) is usually characterized by continuous (analog) signals, while the type of transmission according to (4) usually produces discontinuous signals (e.g. impulses, digital signals).
- the invention relates to a method for controlling the change of telecommunication channels of a telecommunication subsystem integrated in a telecommunication system as a local message transmission loop - in particular a DECT-specific RLL / WLL subsystem integrated in an ISDN system (Radio Local Loop / Wireless Local Loop) - according to the preamble of claim 1.
- FIGURE 1 shows, starting from the publications "Nachzinyer Elektronik, Berlin 45 (1995) Issue 1, Pages 21 to 23 and Issue 3 Pages 29 and 30" and IEE Colloquium 1993, 113; (1993), Pages 29/1 - 29 / 1; W.Hing, F. Halsall: "Cordless access to the ISDN basic rate service” based on a DECT / ISDN intermediate system DIIS according to the ETSI publication prETS 300xxx, version 1.10, September 1996 a " ISDN ⁇ DECT-specific RLL / WLL "telecommunications system IDRW-TS (Integrated Services Digital Network ⁇ -» Radio in the Local Loop / Wireless in the Local Loop) with an ISDN telecommunications subsystem I-TTS ⁇ cf.
- the DECT / ISDN Intermediate System DIIS or the RLL / WLL telecommunications subsystem RW-TTS is preferably based on a DECT / GAP system DGS [Digital Enhanced (formerly: European) Cordless Telecommunication; see. (1): stunten ⁇ technik electronics 42 (1992) Jan./Feb. No. 1, Berlin, DE; U. Pilger "Structure of the DECT standard", pages 23 to 29 in connection with the ETSI publication ETS 300175-1 ... 9, October 1992; (2): Telcom Report 16 (1993), No.
- the RW-TTS telecommunications subsystem can also be based on a GSM system (Groupe Speciale Mobile or Global System for Mobile Communication; see Informatik Spektrum 14 (1991) June, No. 3, Berlin, DE; A.Mann: "Der GSM- Standard - Basis for digital European mobile radio networks ", pages
- the ISDN telecommunications subsystem I-TTS may be designed as a GSM system.
- radio channels e.g. DECT channels
- ISDN line-based telecommunication systems
- the wireless connection technology RLL / WLL (Radio in the
- ISDN services are made available to the ISDN subscriber at standard ISDN interfaces (cf. FIG. 1).
- the "ISDN ⁇ DECT-specific RLL / WLL" telecommunications system IDRW-TS there is a telecommunications subscriber (user) TCU (Tele-Communication User) with its terminal TE (terminal endpoint; terminal equipment) ) for example via a standardized S-interface (S-BUS), the DECT / ISDN Intermediate System DIIS (first telecommunications subsystem), which is designed as a local message transmission loop and is preferably DECT-specific and is contained in the RLL / WLL telecommunications subsystem RW-TTS ), a further standardized S interface (S-BUS), a network termination NT (Network Termination) and a standardized U interface of the ISDN telecommunication subsystem I-TTS (second telecommunication subsystem) into the ISDN world with the therein available services.
- S-BUS the DECT / ISDN Intermediate System DIIS (first telecommunications subsystem)
- the first telecommunication subsystem DIIS essentially consists of two telecommunication interfaces, one first telecommunication interface DIFS (DECT Intermediate Fixed System) and a second telecommunication interface DIPS (DECT Intermediate Portable System), which are wirelessly connected to each other, for example via a DECT air interface. Because of the quasi-location-bound first telecommunication interface DIFS, the first telecommunication subsystem DIIS forms the local night-time transmission loop defined above in this context.
- the first telecommunications interface DIFS contains a radio fixed part RFP (Radio Fixed Part), an adapter unit IWU1 (InterWorkmg Dnit) and an interface circuit INC1 (INterface Circuitry) to the S interface.
- the second telecommunications interface DIPS contains a radio mobile part RPP (Radio Portable Part) and a matching unit IWU2 (InterWorkmg Unit) and an interface circuit INC2
- the RFP fixed part and the RPP radio handset form the well-known DECT / GAP system DGS.
- the TE-specific signaling channels to the network are separated by TE-individual addresses TEI (Terminal Endpoint Identifier).
- the access mechanism to the D channel ensures the order of the messages individually for each TE.
- Throughput rate 16 kbp ⁇
- FIGURE 2 shows, based on the printing, “Nachzin- technik Elektronik 42 (1992) Jan./Feb., No. 1, Berlin, DE; U. Pilger: "Structure of the DECT standard", pages 23 to 29 in connection with ETS 300 175-1 ... 9, October 1992 "the TDMA structure of the DECT / GAP system TKS.
- the DECT / GAP system is a hybrid system with regard to the multiple access methods, in which radio messages according to the FDMA principle on ten frequencies in the frequency band between 1.88 and 1.90 GHz are based on the TDMA principle according to FIG. 2 in a predetermined time sequence from the base station RFP to The RPP handset and the RPP handset can be sent to the base station RFP (duplex operation)
- Multi-time frame MZR which occurs every 160 ms and which has 16 time frames ZR, each with a duration of 10 ms.
- information relating to a C, M, N, P, Q channel defined in the DECT standard is transmitted separately after the base station RFP and handset RPP.
- Each of the 16 time frames ZR of the multiple time frame MZR is in turn divided into 24 time slots ZS each having a time duration of 417 microseconds ⁇ , 12 of which Zeit ⁇ chlitze ZS (time slots 0 ...
- time slots ZS time slots 12 ... 23
- information with a bit length of 480 bits is transmitted according to the DECT standard.
- 32 bits become transmitted as synchronization information in a SYNC field and 388 bits as user information in a D field.
- the remaining 60 bits are transmitted as additional information in a Z field and as protection information in a "guard time” field.
- the 388 bits of the D field which are transmitted as useful information are in turn divided into a 64 bit long A field, a 320 bit long B field and a 4 bit long "X-CRC" word.
- the 64 bit long A field is set is composed of an 8-bit data header, a 40-bit data record with data for the C, Q, M, N, P channels and a 16-bit "A-CRC" word.
- the C £ channel occupies a time slot.
- FIG. 3 shows on the basis of the OSI / ISO layer model [cf. (1): confirmssure - Deut ⁇ cheInstitut Jg. 48, 2/1995, pages 102 to 111; (2): ETSI publication ETS 300175-1.9, October 1992; (3): ETSI publication ETS 300102, February 1992; (4): ETSI publication ETS 300125, September 1991; (5): ETSI publication ETS 300012, April 1992] em model of the C- Level of the "ISDN ⁇ DECT-specific RLL / WLL" telecommunication system IDRW-TS according to FIG. 1.
- FIG. 4 shows on the basis of the OSI / ISO layer model [cf. (1): Lesson sheets - Irish WegInstitut Jg. 48,
- the C ⁇ channel structure offers an optimal bandwidth economy for a standard speech connection, since according to FIG. 5 starting from FIGS. 3 and 4 and taking into account the ETSI publications (ETS 300175-1, 10/1992, chap. 7; ETS 300175-3, 10/1992, chapter 4.1; ETS 300175-4, 10/1992, chapter 4) only one transmission path (bearer) - e.g. MBC with the LCNy, LCN1 according to FIGURE 5 - or a connection or a time slot is required.
- the use of the Cf channel is based on FIGS. 3 and 4 and taking into account the ETSI publications (ETS 300175-1, 10/1992, chapter 7; ETS 300175-3, 10/1992, chapter 4.1; ETS 300175-4, 10/1992, chap. 4) to a lower bandwidth economy, since the U-plane (U-plane) itself requires a further transmission path (bearer) or an additional connection or a further time slot; ie two transmission paths (bearers) - for example MBC with the LCN2, LCNz and MBC with the LCNy, LCNl according to FIG. 5 - or two connections or two time slots are necessary for a simple voice connection.
- ETSI publications ETS 300175-1, 10/1992, chapter 7; ETS 300175-3, 10/1992, chapter 4.1; ETS 300175-4, 10/1992, chap. 4
- the U-plane itself requires a further transmission path (bearer) or an additional connection or a further time slot; i
- the object on which the invention is based is to transmit system information in a telecommunications subsystem which is integrated in a telecommunications system as a local night transmission loop, in particular a DECT-specific RLL / WLL subsystem integrated in an ISDN system
- a local night transmission loop switching from one telecommunication channel to another telecommunication channel is easy to control without any influence on the subsystem information usually transmitted to the telecommunication subsystem.
- This task is based on the m defined in the preamble of claim 1 by the method in the Characteristic of claim 1 specified features ge solved.
- the idea on which the invention is based consists in changing the channel in a telecommunication subsystem, which is integrated in a telecommunication system as a local message transmission loop - in particular a DECT-specific RLL / WLL subsystem integrated in an ISDN system - of the inputs mentioned and outlined Type to control by two commands, a first command designed as a switch command and a second command designed as a switch response.
- FIGS. 6 to 10 show different incentive state diagrams, the possible sequences when changing telecommunication channels of a telecommunication subsystem integrated in a telecommunication system as a local night transmission loop, in particular an RLL / WLL subsystem RW- integrated in an ISDN system.
- TTS-DIIS represent.
- FIGURE 6 shows, based on FIGURES 1 to 5, a first incentive state diagram, which represents the basic control sequence for a change of subsystem channel.
- the first telecommunication interface DIFS is connected on a first transmission path with a first transmission path number LCNx (Logical Connection Number; identifier) through a first subsystem channel C x to the second telecommunication interface DIPS.
- LCNx Logical Connection Number
- identifier Identifier
- there can be between the first telecommunication interface DIFS and the second one Telecommunication interface DIPS can be set up on a second transmission path with a second transmission path number LCNy through a second subsystem channel C y an additional telecommunication connection.
- the relationship LCNx ⁇ LCNy applies to the transmission path numbers LCNx, LCNy.
- the first subsystem channel C x can be as DECT-specific C f channel or C ⁇ channel can be formed. Because of the channel constellations that occur in the DECT-specific telecommunications subsystem RW-TTS, DIIS, the second subsystem channel C y is consequently em C ⁇ channel or em Cf channel or C 3 channel. According to FIG. 6, the first subsystem channel C x is used for information transmissions on the C plane (C plane).
- a DECT-specific first B-field message "BEARER_REQUEST” (cf. ETSI publication ETS 300175-3, October 1992, chap. 7.3.3.2) as a command (COMMAND) and a DECT specific second B-field message "BEARER_CONFIRM” (cf. ETSI publication ETS 300175-3, October 1992, chap. 7.3.3.3) was sent as a response (RESPONSE) (cf. ETSI publication ETS 300175-3, October 1992, chap. 10.5.1.1 to 10.5.1.3).
- the sending of the first B-field message "BEARTER_REQUEST” is preferably initiated by the second telecommunication interface DIPS (cf. FIGURES 9 and 10 and ETSI publication ETS 300175-3, October 1992, chap. 10.5.1.2 and 10.5.1.3).
- the first telecommunication interface DIFS recognizes the need to change the channel (change from the first subsystem channel C x to the second subsystem channel C y ) bring about.
- the result of the analysis forms the stimulus for the channel change.
- a possible first result of this analysis can be, for example, that on the first subsystem channel C x, preferably for a predetermined period of time, no messages between the first telecommunication interface DIFS and the second telecommunication interface DIPS are transmitted.
- a possible second result of this analysis can be, for example, that two transmission paths, each with a C level and a U level, are set up and the transmission path on which the C level is used is to be reduced; consequently a change from the previously active C 3 channel to be dismantled to the previously inactive C 3 channel is necessary.
- the first telecommunications interface DIFS always has the option of selecting a DECT channel structure corresponding to the ISDN service (C level and / or U level).
- the second telecommunication interface DIPS instead of the first telecommunication interface DIFS, it is also possible to provide the second telecommunication interface DIPS for this. However, this is only possible if it has direct access to the ISDN "layer 3". Alone from the ISDN "layer 2" function, the second telecommunications interface DIPS cannot uniquely map a TE-individual connection with the C level and U level to a corresponding DECT channel structure in all situations.
- the MASTER-SLAVE configuration described above is used as a basis.
- a DECT-specific first DLC message "RECEIVE_READY” sent as an answer (RESPONSE) (cf. ETSI publication ETS 300175-4, October 1992, chap. 7.11.2)
- the first telecommunications interface DIFS is preferred - after having used it Has recognized the need for a channel change - all unacknowledged (unanswered) information transmitted and completely received on the first subsystem channel C x according to the HDLC protocol (High level Data Link Control), the so-called I-frames (information package) , confirm (answer) if no further I-frame is sent.
- HDLC protocol High level Data Link Control
- the HDLC protocol it is e.g. possible to transmit the information (I-frame) in transmission sequences (windows) and to acknowledge each transmission sequence (each window) separately.
- the window size k 3 means with respect to the above-mentioned I frames that after every third I frame an acknowledgment of the previously transmitted three frames takes place.
- the following relationship generally applies to window size k:
- SWITCHING_REQUEST which can, for example, either be defined in the DECT standard (cf. MAC message “ATTRIBUTES_T._REQUEST” in FIGURES 7 to 10 according to ETSI publication ETS 300175-3, October 1992, chapter 7.2 .5.3.8) or still to be defined in this, the request of the first telecommunication interface DIFS to transfer the transmission of the system information from the first subsystem channel C x to the second subsystem channel C y is transmitted to the second telecommunication interface DIPS. As mentioned above, the request may have arisen through stimulation or without any impetus.
- the first telecommunication interface DIFS can either - preferably - interrupt its own information transmission on the C level or continue with the transmission of the information on the C level. Interruption here means that the first telecommunication interface DIFS will no longer send any further information for a predetermined period of time. The interruption can take place, for example, before, with or after the transmission of the message.
- the message can be sent at the I-frame boundaries and within an I-frame.
- the second telecommunication interface DIPS with or after receipt of the message "SWITCHING_REQUEST", will preferably delete all incompletely received I frames and, with or after receipt of the message "SWITCHING_REQUEST", it can transmit its own information at the C level, like the first telecommunication interface DIFS , either pause or continue.
- the second telecommunications interface DIPS in the event that the own transmitter is free, with the DECT-specific first DLC message "RECEIVE_READY" sent as a response (RESPONSE) (cf. ETSI publication ETS 300175-4, October 1992, Chapter 7.11.2) confirm (answer) all unconfirmed (unanswered) information transmitted and completely received on the first subsystem channel C x according to the HDLC protocol (High level Data Link Control), the so-called I-frame.
- the HDLC protocol High level Data Link Control
- the second telecommunications interface DIPS may complete the transmission of an I-frame before the interruption.
- the interruption of the information transmission or the continuation of the information transmission on the first subsystem channel C x by the second telecommunication interface DIPS preferably takes place between the receipt of the first message and before the transmission of a second message "SWITCHING_CONFIRM", which is again, for example, either in the DECT Defined as standard can be (cf. MAC message "ATTRIBUTES_T._CONFIRM" in FIGURES 7 to 10 in accordance with ETSI publication ETS 300175-3, October 1992, chap. 7.2.5.3.8) or m still to be defined.
- the second message "SWITCHING_CONFIRM” corresponds, for example, to the wish of the first telecommunications interface DIFS for a change in the subsystem channel, by confirming it (answered positively).
- the second telecommunication interface DIPS consciously or unconsciously (e.g. by not receiving the first message due to a fault on the radio transmission link) does not correspond to the request.
- the first message "SWITCHING_REQUEST" is either immediate or indirect, e.g. by specifying a predefined one
- Time period for the confirmation of the first message is exceeded, rejected by the second telecommunication interface DIPS (answered negatively).
- the first message "SWITCHING_REQUEST" is communicable, e.g. by exceeding a predetermined time for the confirmation of the first message (answered negatively).
- either the first message "SWITCHING_REQUEST" from the first telecommunication interface DIFS is repeated for a predetermined number transmitted or the channel change aborted for an indefinite time.
- the information transmission is continued on the second subsystem channel C y .
- the continuation can preferably take place with or after the transmission of the message.
- the first telecommunication interface DIFS will preferably also delete the unconfirmed information transmitted and incompletely received on the first subsystem channel C x .
- subsystem-specific parameters such as the retransmission counter or timer specific to the DLC layer (see ETSI -Publication ETS 300175-4, October 1992, section 9.2.5.7) and the C ⁇ package number (see ETSI publication ETS 300175-3, October 1992, section 7.1.2) have been reset.
- test message which must be confirmed can be transmitted on the second subsystem channel C y before the information deleted by the first telecommunication interface DIFS and the second telecommunication interface DIPS is transmitted again.
- the test message is preferably the first DLC message "RECEIVE_READY” sent as a command (COMMAND) (cf. ETSI publication ETS 300175-4, October 1992, chap. 7.11.2) while the confirmation of the Test message is preferably the first DLC message "RECEIVE_READY” sent as a response (RESPONSE) (cf. ETSI publication ETS 300175-4, October 1992, chap. 7.11.2).
- FIGURE 7 is based on FIG 6, a second supply incentive ⁇ tand ⁇ diagram da ⁇ the control sequence for the change from a first subsystem channel C £ to a second channel Operasystem ⁇ E represents C.
- the first subsystem channel Cf is used for information transmission at the C level.
- the second subsystem channel C ⁇ is not used for information transmission at the C level. However, the U level is used.
- the first subsystem channel C f has a greater transmission capacity than the second subsystem channel C s .
- the first telecommunications interface DIFS recognizes that the first subsystem channel Cf is no longer necessary and sends a first MAC message "ATTRIBUTES_T._REQUEST" (cf. ETSI publication ETS 300175-3, October 1992, chapter 7.2.5.3.8) second telecommunications interface DIPS.
- the second telecommunications interface DIPS confirms the first MAC message "ATTRIBUTES_T._REQUEST” by sending a second MAC message "ATTRIBUTES_T._CONFIRM” to the first telecommunications interface DIFS. Thereafter, the second subsystem channel C s is used for information transmission at the C level and the first subsystem channel Cf by transmitting a third MAC message "RELEASE” (cf. ETSI publication ETS 300175-3, October 1992, chapter 7.2. 5.3.13) resolved.
- FIGURE 8 shows, starting from FIGURE 6, a third incentive state diagram which represents the control sequence for the change from the second subsystem channel C s to a third subsystem channel C s .
- the second subsystem channel C s is used for information transmission at the C level.
- the U level is also used.
- the third subsystem channel C ⁇ is not used for information transmission at the C level. However, the U level is used.
- the second subsystem channel C £ has the same transmission capacity as the third subsystem channel C s .
- the first telecommunications switching point DIFS recognizes that the second subsystem channel C s is no longer necessary and sends the first MAC message “ATTRIBUTES_T._REQUE ⁇ T” (cf. ETSI publication ETS 300175-3, October 1992, chap. 7.2.5.3.8) to the second telecommunications interface DIPS.
- the second telecommunication point DIPS confirms the first MAC message "ATTRIBUTES_T._REQUEST” by sending the second MAC message "ATTRIBUTES_T._CONFIRM" to the first telecommunication point DIFS. Thereafter, the third subsystem channel C s is used for information transmission at the C level and the second subsystem channel C ⁇ by transmitting the third MAC message "RELEASE” (cf. ETSI publication ETS 300175-3, October 1992, chapter 7.2 .5.3.13) resolved.
- FIGURE 9 shows, starting from FIGURE 6, a fourth incentive-state diagram that represents the control sequence for the change from the second subsystem channel C E to the first subsystem channel C f , the preparation of the change being initiated by the first telecommunication interface DIFS becomes.
- the second subsystem channel C s is used for information transmission on the C level.
- the U- Level used.
- a transmission path with a transmission path number LCN (identifier) for using the first subsystem channel C ⁇ has not yet been set up.
- the second subsystem channel C ⁇ has a smaller transmission capacity than the first subsystem channel C f .
- the first telecommunication interface DIFS recognizes that the first subsystem channel Cf is necessary. However, since there is still no transmission path with the identifier LCN for the first subsystem channel Cf, the first telecommunications
- Interface DIFS of the second telecommunications interface DIPS the first MAC message "ATTRIBUTES_T._REQUEST" (cf. ETSI publication ETS 300175-3, October 1992, chap. 7.2.5.3.8). With this message, it shares the second telecommunications Interface DIPS with the fact that a transmission path with the identifier LCN, for example the identifier LCNO, is required for the first subsystem channel C £ .
- the choice of the identifier LCN - in the present case the LCNO - as the identifier for the transmission path to be set up is not made arbitrarily, but specifically according to a predetermined selection criterion.
- this criterion consists in that the identifier LCN is the identifier of the possible identifiers LCNO, LCN1, LCN2 which is not yet used for another transmission path, that is to say is free.
- the selection criterion mentioned above it is also possible to use special characteristics of the selection criterion for the assignment of the identifier. For example, As in the present case, the smallest free identifier of the identifiers LCNO, LCN1, LCN2 or the largest free identifier of the identifiers LCNO, LCN1, LCN2 are always used.
- the second telecommunication interface DIPS which according to the explanations in the description of FIG. 6 is preferably responsible for the establishment of a transmission path (cf. ETSI publication ETS 300175-3, October 1992, chap. 10.5.1.2 and 10.5.1.3), sends the DECT-specific first B-field message "BEARER_REQUEST" (cf. ETSI publication ETS 300175-3, October 1992, chapter 7.3.3.2) as a command (COMMAND) to the First telecommunications interface DIFS
- the first telecommunications interface DIFS then sends the DECT-specific second B-field message "BEARER_CONFIRM" after receiving the first B-field message (cf. ETSI publication ETS 300175-3, October 1992, chapter 7.3.
- the first telecommunications interface DIFS then sends the first MAC message "ATTRIBUTES_T._REQUEST" (cf. ETSI publication ETS 300175-3, October 1992, chapter 7.2.5.3.8) to the second telecommunications interface DIPS.
- the second telecommunications interface DIPS confirms the first MAC message "ATTRIBUTES_T._REQUEST” by sending the second MAC message "ATTRIBUTES_T._CONFIRM" to the first telecommunications interface DIFS.
- the first subsystem channel Cf is then used for information transmission at the C level.
- FIGURE 10 shows, starting from FIGURE 6, a fifth incentive-state diagram that shows the control sequence for the change from the second subsystem channel C s to the first subsystem channel
- Cf represents, wherein the preparation of the switch is initiated by the second telecommunication interface DIPS.
- the second subsystem channel C s is used for information transmission at the C level.
- the U level is also used.
- a transmission route with a transmission route number LCN (identifier) for using the first subsystem nal Cf has not yet been set up.
- the second subsystem channel C s has a smaller transmission capacity than the first subsystem channel C f .
- the second telecommunication interface DIFS recognizes that the first subsystem channel Cf is necessary. However, since there is still no transmission path with the identifier LCN, for example the identifier LCNO, for the first subsystem channel C f , this is set up by it.
- the choice of the identifier LCN - in the present case the LCNO - as an identifier for the transmission path to be set up is not made arbitrarily, but again specifically according to a predetermined selection criterion.
- This criterion is generally formulated in that the identifier LCN is the identifier of the possible identifiers LCNO, LCN1, LCN2 which is not yet used for another transmission path,
- the selection criterion mentioned above it is also possible to use special characteristics of the selection criterion for the assignment of the identifier. For example, As in the present case, the smallest free identifier of the identifiers LCNO, LCN1, LCN2 or the largest free identifier of the identifiers LCNO, LCN1, LCN2 are always used.
- the second telecommunication interface DIPS sends the structure of the transmission path, which, according to the explanations given in the description of FIG. 6, is preferably responsible for the structure of a transmission path (cf. ETSI publication ETS 300175-3, October 1992, chapter 10.5 .1.2 and 10.5.1.3), the first telecommunications interface DIFS the DECT-specific first B-field message "BEARER_REQUEST" (cf. ETSI publication ETS 300175-3, October 1992, chap. 7.3.3.2) as a command (COMMAND) .
- the first telecommunication interface DIFS then sends the DECT-specific second B-field message "BEARER_CONFIRM" after receiving the first B-field message (cf. ETSI publication ETS 300175-3, October 1992, chap. 7.3.3.3) as a response (RESPONSE) to the second telecommunication interface
- the second telecommunications interface DIPS confirms the first MAC message "ATTRIBUTES_T._REQUEST” by sending the second MAC message "ATTRIBUTES_T._CONFIRM" to the first telecommunications interface DIFS.
- the first subsystem channel C f is then used for the information transmission at the C level.
- FIG. 11 shows, based on FIGS. 1 to 5, the basic structure of a transmitting part and receiving part for the first telecommunication interface DIFS and the second telecommunication interface DIPS, which is used for the analysis of the ISDN "layer 2" / "layer 3” messages or the amount of messages transmitted via this (cf. publication “Nachrich ⁇ tentechnik Elektronik, Berlin 41, T2: (1991) Issue 4, pages 138 to 143;”) on the transmission line "ISDN network ⁇ —> ISDN subscriber (terminal endpoint TE) "of importance.
- the first telecommunication interface DIFS and / or the second telecommunication interface DIPS knows the need to bring about a channel change (change from one subsystem channel to another subsystem channel).
- the result of the analysis forms the stimulus for the channel change.
- the structure of the transmitting part and receiving part shown in FIG. 11 can also be used for the first exemplary embodiment of the invention in connection with the stimulation of the channel change.
- the NWK layer In the transmission part of the first telecommunication interface DIFS or the second telecommunication interface DIPS, the NWK layer (NetWorKlayer) transfers ISDN "layer 2" / "layer 3" information and DECT control information via a first embodiment formed as a memory in a known manner - Te ⁇ chlange WSD to the DLC layer (Data Link Control).
- a MAC / DLC control device STE of the transmitting part measures the full degree in the queue WSD and stimulates the MAC layer (Medium Access Control) and DLC layer therefrom. As long as the full degree remains below a threshold SD, the DLC layer stores the information (message) to be transmitted in a second queue WSS, likewise formed as a memory, from which it transmits the MAC layer on the C 3 channel to the receiving point.
- the DLC layer When the threshold SD is exceeded, the DLC layer stores the information in a third queue WSF, which is in turn formed as memory, from which it transmits the MAC layer to the receiving part on a C f channel that is set up for this purpose .
- the C 3 channel is used again when the first queue WSD and the third queue WSF are empty.
- the C f channel can of course also be used for transmissions in the opposite direction, provided it is already existent.
- the DLC layer uses the DECT-A-field format (DECT standard) to feed the second queue WSS.
- DECT standard DECT standard
- the third queue WSF is fed in the DECT B field format. The switchover for transmission from the third queue WSF takes place after the establishment of the Cf channel, if the second queue WSS is empty or the C £ channel is ready.
- the switchover then always takes place at DLC frame boundaries.
- DLC-PDU data overhang data overhead; protocol data
- the maxiamle DLC frame length is not used, - bridging the setup time for the C f channel.
- DLC procedures Data Link Control
- C ⁇ channel ⁇ --> C f channel DLC procedures
- the initiating telecommunication interface DIFS, DIPS (eg the second telecommunication interface DIPS) sends a command "SUSPEND" on the C ⁇ channel. If the If the remote station (the first telecommunication interface DIFS) itself has to send I-frames from the first queue WSS, it ends the earliest at the next frame boundary (remaining frames are transferred to the third queue WSF), the last acknowledgment awaits on the C ⁇ - Channel and then accepts the command "SUSPEND" (suspension) on the C ⁇ channel.
- DIPS eg the second telecommunication interface DIPS
- the second telecommunications interface DIPS then initiates the resumption of the connection (data link) by means of a “RESUME” command on the C £ channel.
- the first telecommunications interface DIFS acknowledges this on the C f channel.
- both telecommunications interfaces set DIFS, DIPS the transmission continues on the Cf channel.
- the downshift takes place when the first queue WSD and the third queue WSF are empty on both sides and the last I frame is acknowledged.
- the condition is first met at the telecommunications interface that caused the switchover (the second telecommunications interface DIPS).
- the second telecommunication interface DIPS sends the command "SUSPEND" on the C £ channel.
- the first telecommunication interface DIFS rejects the "SUSPEND” command on the C f channel and continues to send information on the C f channel, the first telecommunication interface DIFS consequently also takes the initiative to switch to the C ⁇ - Channel and in turn initiates the "Suspension / Resumption" when the Cf channel is no longer required.
- the second telecommunication interface DIPS could spontaneously use the C f channel again if required.
- the answering telecommunication interface DIFS, DIPS accepts the "suspension" on the C f channel.
- the suspending telecommunication interface DIFS, DIPS then initiates the "resumption” on the C E channel.
- the DLC layer in the transmitting part specifies a frame length L, but must expect that it is necessary to switch to the third queue WSF within the frame and that the frame there must be closed in B-field format . In this case, it stores L and all that have already been transferred to the second queue WSS. NEN data and can form the frame conclusion (full octets, checksum) according to B-field rules.
- An extension of the more standardized functions of the MAC layer can be used to control the switchover for the DLC layer without gaps. This extension affects the A field as follows ( ⁇ . ETS 300 175-3, 7.2.5, in particular 7.2.5.3 ff.).
- the rest of the A field essentially contains the following information under this command: - Reference of the MAC connections between which the C 3 -channel / C £ -channel switchover is to take place (the already defined ECN; Exchanged Connection Number is used) . Specific switching command C ⁇ channel -> C £ channel / Cf channel -> C ⁇ channel. - Acknowledgment: switchover accepted / not accepted, confirmation of correct receipt of the command "acknowledgment". Blank field (use the waiting function if it cannot be acknowledged immediately).
- the B field of the time slots with these MAC control information either carries user information (U level) if the C ⁇ channel is used or the signaling information itself or no information when the C 3 channel is used.
- the initiating telecommunications interface DIFS, DIPS sends on the C 3 channel after the MAC connection has been established the Cf channel instead of an I-frame segment, the switchover command C ⁇ channel -> C £ channel.
- the opposite side acknowledges acceptance on the C ⁇ channel (there is no reason for rejection in this case).
- both telecommunication interfaces DIFS, DIPS continue the transmission on the C £ channel.
- the telecommunication interface DIFS, DIPS initiating the C f channel no longer needs this channel, it sends the switching command Cf channel -> C ⁇ channel on the C ⁇ channel. If the other side no longer needs this channel at this time (WSD, WSF empty), it acknowledges the acceptance of the downshift. Otherwise, it rejects the downshift and in turn takes over the initiative to restart the downshift when it no longer needs the C £ channel. As long as the C f channel is active, it can also be used by the opposite side.
- the method can of course also be used at I-frame boundaries.
- the C f channel can be set up according to DECT rules if required by both telecommunication interfaces DIFS, DIPS. Collisions should lead to a common channel.
- dismantling In the event of a collision between assembly and dismantling, dismantling has priority.
- the use of the C f channel can also be stimulated by other criteria.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU27625/97A AU2762597A (en) | 1996-04-04 | 1997-04-03 | Control of the change of telecommunications channels in a dect-specific rll/wll partial system bound to an isdn-system |
JP09535745A JP3099968B2 (ja) | 1996-04-04 | 1997-04-03 | ローカル情報送信ループとして、電気通信システムに接続している電気通信サブシステムの電気通信チャンネルの変化、特にisdnシステムに接続している、dect専用rll/wllサブシステムの電気通信チャンネルの変化を制御する方法 |
BR9708531A BR9708531A (pt) | 1996-04-04 | 1997-04-03 | Processo para comando de troca de canais de telecommunicação de um sistema parcial de telecomunicação de um sistema parcial de telecomunicações local em um sistema de telecomunicação particulamente um sistema parcial de rll/wll especifico de dect incorporado em um sistema de isdn |
PL97329638A PL183294B1 (pl) | 1996-04-04 | 1997-04-03 | Sposób sterowania przełączaniem kanałów telekomunikacyjnych w podsystemie telekomunikacyjnym włączonym w postaci pętli transmisji informacji do systemu telekomunikacyjnego, zwłaszcza włączonym do systemu ISDN podsystemie RLL/WLL zgodnego ze standardem DECT |
EP97921602A EP0891681A1 (de) | 1996-04-04 | 1997-04-03 | Kanalwechselsteuerung eines in einem isdn-system eingebundenen dect-spezifischen rll/wll-teilsystem |
US09/155,379 US6584114B1 (en) | 1996-04-04 | 1997-04-03 | Control of the change of telecommunications channels in a DECT-specific RLL/WLL partial system bound to an ISDN-system |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19613636 | 1996-04-04 | ||
DE19613636.9 | 1996-04-04 | ||
DE19625141.9 | 1996-06-24 | ||
DE19625141A DE19625141C2 (de) | 1996-04-04 | 1996-06-24 | Verfahren zur Steuerung des Wechsels von Telekommunikationskanälen eines in einem Telekommunikationssystem als lokale Nachrichtenübertragungsschleife eingebundenen Telekommunikationsteilsystems, insbesondere eines in einem ISDN-System eingebundenen DECT-spezifischen RLL/WLL-Teilsystems |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997038546A1 true WO1997038546A1 (de) | 1997-10-16 |
Family
ID=26024516
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1997/000689 WO1997038546A1 (de) | 1996-04-04 | 1997-04-03 | Kanalwechselsteuerung eines in einem isdn-system eingebundenen dect-spezifischen rll/wll-teilsystem |
Country Status (10)
Country | Link |
---|---|
US (1) | US6584114B1 (de) |
EP (1) | EP0891681A1 (de) |
JP (1) | JP3099968B2 (de) |
CN (1) | CN1215538A (de) |
AU (1) | AU2762597A (de) |
BR (1) | BR9708531A (de) |
CA (1) | CA2250838A1 (de) |
ID (1) | ID16514A (de) |
PL (1) | PL183294B1 (de) |
WO (1) | WO1997038546A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6075792A (en) | 1997-06-16 | 2000-06-13 | Interdigital Technology Corporation | CDMA communication system which selectively allocates bandwidth upon demand |
US6791969B1 (en) * | 1999-09-15 | 2004-09-14 | Lucent Technologies Inc. | Multiple input/output switch |
US6765870B2 (en) * | 2000-12-21 | 2004-07-20 | At&T Wireless Services, Inc. | Medium access dynamic congestion control mechanism for wireless data |
US20080026192A1 (en) * | 2006-07-25 | 2008-01-31 | Halliday Brian L | Composite thermal transfer, method of making same and label webs |
US8605650B2 (en) * | 2008-06-10 | 2013-12-10 | Motorola Solutions, Inc. | System and method for interrupting a transmitting device in a communication system |
US8619786B2 (en) * | 2010-10-20 | 2013-12-31 | Qualcomm Incorporated | Facilitating distributed channel access for transmissions in a wireless communication environment |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993021719A1 (de) * | 1992-04-09 | 1993-10-28 | Siemens Aktiengesellschaft | Verfahren zur strukturierung eines b-feld formates im dect-standard |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2696509B2 (ja) * | 1987-05-13 | 1998-01-14 | 株式会社リコー | データ端末装置の制御方式 |
JPH0388534A (ja) * | 1989-08-31 | 1991-04-12 | Hitachi Ltd | パケット交換方式 |
GB2236454A (en) * | 1989-09-01 | 1991-04-03 | Philips Electronic Associated | Communications system for radio telephones |
SE9401879L (sv) * | 1994-05-31 | 1995-12-01 | Ericsson Telefon Ab L M | Anordning vid telekommunikationssystem |
DE19508081A1 (de) * | 1995-03-08 | 1996-09-12 | Sel Alcatel Ag | Verfahren zum Steuern eines Zugangsnetzes sowie Vermittlungsstelle und Zugangsnetz damit |
ZA965340B (en) * | 1995-06-30 | 1997-01-27 | Interdigital Tech Corp | Code division multiple access (cdma) communication system |
-
1997
- 1997-04-03 WO PCT/DE1997/000689 patent/WO1997038546A1/de not_active Application Discontinuation
- 1997-04-03 EP EP97921602A patent/EP0891681A1/de not_active Ceased
- 1997-04-03 PL PL97329638A patent/PL183294B1/pl not_active IP Right Cessation
- 1997-04-03 AU AU27625/97A patent/AU2762597A/en not_active Abandoned
- 1997-04-03 CN CN97193617A patent/CN1215538A/zh active Pending
- 1997-04-03 CA CA002250838A patent/CA2250838A1/en not_active Abandoned
- 1997-04-03 US US09/155,379 patent/US6584114B1/en not_active Expired - Lifetime
- 1997-04-03 BR BR9708531A patent/BR9708531A/pt unknown
- 1997-04-03 JP JP09535745A patent/JP3099968B2/ja not_active Expired - Fee Related
- 1997-04-04 ID IDP971142A patent/ID16514A/id unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1993021719A1 (de) * | 1992-04-09 | 1993-10-28 | Siemens Aktiengesellschaft | Verfahren zur strukturierung eines b-feld formates im dect-standard |
Non-Patent Citations (1)
Title |
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PILGER U: "STRUKTUR DES DECT-STANDARDS", NACHRICHTENTECHNIK ELEKTRONIK, vol. 42, no. 1, 1 January 1992 (1992-01-01), pages 23 - 29, XP000279214 * |
Also Published As
Publication number | Publication date |
---|---|
US6584114B1 (en) | 2003-06-24 |
CA2250838A1 (en) | 1997-10-16 |
AU2762597A (en) | 1997-10-29 |
CN1215538A (zh) | 1999-04-28 |
PL183294B1 (pl) | 2002-06-28 |
EP0891681A1 (de) | 1999-01-20 |
JP2000505634A (ja) | 2000-05-09 |
JP3099968B2 (ja) | 2000-10-16 |
BR9708531A (pt) | 1999-08-03 |
ID16514A (id) | 1997-10-09 |
PL329638A1 (en) | 1999-04-12 |
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