EP1386517A1 - Verfahren zur dynamischen kanalzuordnung - Google Patents
Verfahren zur dynamischen kanalzuordnungInfo
- Publication number
- EP1386517A1 EP1386517A1 EP02740278A EP02740278A EP1386517A1 EP 1386517 A1 EP1386517 A1 EP 1386517A1 EP 02740278 A EP02740278 A EP 02740278A EP 02740278 A EP02740278 A EP 02740278A EP 1386517 A1 EP1386517 A1 EP 1386517A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame
- channel
- channel assignment
- termination
- telephony
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5614—User Network Interface
- H04L2012/5615—Network termination, e.g. NT1, NT2, PBX
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/54—Store-and-forward switching systems
- H04L12/56—Packet switching systems
- H04L12/5601—Transfer mode dependent, e.g. ATM
- H04L2012/5638—Services, e.g. multimedia, GOS, QOS
- H04L2012/5663—Support of N-ISDN
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13039—Asymmetrical two-way transmission, e.g. ADSL, HDSL
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13097—Numbering, addressing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13109—Initializing, personal profile
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13162—Fault indication and localisation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13174—Data transmission, file transfer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13176—Common channel signaling, CCS7
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13201—Change-over of service during connection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13202—Network termination [NT]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13203—Exchange termination [ET]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13204—Protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13209—ISDN
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13215—Code checking, CRC
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13216—Code signals, frame structure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1329—Asynchronous transfer mode, ATM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13292—Time division multiplexing, TDM
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13332—Broadband, CATV, dynamic bandwidth allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13348—Channel/line reservation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13361—Synchronous systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13389—LAN, internet
Definitions
- ISDN ISDN - Integrated Services Digital Network
- DSL Digial Subscriber Line
- telephony connections and / or ISDN connections can be operated simultaneously with data connections on the subscriber line and can be set up and terminated individually and independently of one another.
- the assignment or withdrawal of the additional channel no data loss in the ATM channel arise.
- This principle of intensive use of transmission channels is called dynamic channel allocation or dynamic rate repartitioning (DRR).
- the object of the invention is to provide a method for this.
- This method has the advantage of increasing the data transmission capacity of the ATM channel without loss of data.
- This method has the advantage that the existing telephony and ISDN connections are not affected.
- This method has the further advantage that if the channels additionally occupied by ATM are withdrawn, this withdrawal takes place without impairing a renewed connection set-up in ISDN and telephony.
- FIG. 1 shows a division of an SDSL frame
- FIG. 2 shows three examples for the allocation of time slots in an SDSL frame
- FIG. 3 shows two examples of a time slot switchover
- FIG. 4 shows an example of a channel assignment and switching procedure
- FIG. 5 shows an example of a command structure for channel assignment
- FIG. 6 shows an example of a switching procedure
- FIG. 7 shows an example of a frame control unit
- FIG. 8 shows an example of a disturbed procedure
- FIG. 9 shows another example of a disturbed procedure
- FIG. 10 shows another example of a disturbed procedure
- Figure 11 shows a division of an ADSL frame.
- data transport is first considered using an SDSL frame and then using an ADSL frame.
- useful information bits, signaling bits and operational bits are transmitted at defined bit positions.
- FIG. 1 shows the division of an SDSL standard frame in accordance with the European Telecommunications Standardization Institute ETSI and the International Telecommunications Unit ITU.
- the frame is divided into four useful information blocks PL1, PL2, PL3 and PL4, which are referred to as payload blocks.
- Each payload block PL1, PL2, PL3, PL4 is in turn divided into 12 payload sub-blocks P01 to P12, P13 to P24 , P25 to P36 and P37 to P48.
- Each sub-block can be divided into up to 7 Z-channels with 8 kbit / s each and up to 36 B-channels with 64 kbit / s each.
- Each Z time slot contains 1 bit position and each B time slot contains 8 bit positions.
- Signaling bits and operational bits for telephony and ISDN connections can be transmitted in a number of Z time slots and / or adjacent B time slots which is defined as required when the SDSL connection is configured.
- the information bits of the Bl and B2 channels of an ISDN connection are transmitted in two successive B time slots of an SDSL frame.
- the digitized signals of the telephony connections are also in B-
- Transmit time slots with exactly one B time slot being assigned to each telephony connection.
- the required number of telephony B time slots and ISDN B time slot pairs is also specified when configuring the SDSL connection.
- the data of the ATM connection are combined in a further configured number of 64 kbit / s time slots.
- the total number of B time slots is determined by the transmission speed of the current SDSL system and, as specified in FIG. 1, lies between 3 and 36 as standard.
- Overhead data (data about the useful information), which contain individual bit positions for operational information and, with about 3.3 kbit / s transport capacity, the eoc channel.
- the frame contains a 14-bit wide frame word (sync word) for synchronization and finally two bits at the end of the frame to adjust the frame length.
- predetermined numbers of time slots for signaling connections, including operational information, for the telephony connections are used for the ISDN connections and reserved for a broadband connection, in particular an ATM connection.
- FIG. 2 shows further examples of such time slot assignments.
- the first example shows 2 time slots with 1 bit each (Z time slots) for signaling, 5 further time slots with 8 bits each (B time slots) for time-division-based telephony applications and the remaining time slots for an ATM-based connection.
- the next example shows a channel division into the areas signaling, then
- ISDN instead of telephony, and still ATM, while the last example shows the simultaneous use of telephony, ISDN and ATM services.
- time slots can temporarily be allocated to an ATM-based service. For example, if a telephony subscriber hangs up on the SDSL connection after a call and goes on-hook, the 64 kbit / s time slot that is temporarily no longer required is released for the digitized voice with the command to disconnect the telephony connection , According to the invention, this time slot is functionally assigned directly to the ATM time slot area. This is illustrated in the first example in FIG.
- the enlarged ATM area does not form a closed time slot block since there is, for example, another active telephony time slot between the preset area and the activated time slot.
- the B-channel time slot pair of an ISDN connection after it has been released by the command to disconnect the connection, is connected to the ATM area without further routing.
- the ATM cells are to be fed into separate time slot areas of the frame. It is an advantageous embodiment of the invention that the telephony time slots temporarily connected to the ATM channel and also ISDN time slot pairs are not routed, so that interference with existing telephony and ISDN connections is excluded are.
- the time slots or time slot pairs temporarily disconnected from the telephony and ISDN area remain assigned to the ATM area until they are required again in their preset area as a result of a connection request for telephony and ISDN.
- Commands of the EN 300 324-1 standard can be used to initiate the channel assignment procedures for the ATM connection or back into the telephony or ISDN area. These are “Disconnect” for the assignment of a telephony time slot to the ATM connection, “Deactivate” for the assignment of an ISDN time slot pair to the ATM connection, “Establish” for the withdrawal of a telephony time slot in the telephony area and “Activate” for the withdrawal of an ISDN time slot pair into the ISDN area.
- This definition has the advantage that the assignment and switchover procedures can be seamlessly linked to existing signaling procedures for the establishment and termination of connections.
- the assignment and switching procedure initiated by the commands according to EN 300 324-1 is shown in an example in FIG. It is controlled on the network side by the SDSL-LT (LT - Line Termination), whereby the subscriber-side NT (NT - Network Termination) has the slave function.
- the master (LT) first reports to the slave (NT) with the command "B Channel Allocate” in a list of the telephony and ISDN time slots the time slot or slots to be switched. NT confirms the new assignment with the response "B Channel Allocate Ack".
- FIG. 5 shows an example of the design of the assignment commands B Channel Allocate and B Channel Allocate Ack. Both messages are preferably transmitted in the eoc channel. They are marked by a message identifier - message ID that contains the message name mentioned above.
- the message content is accommodated in one byte, each of the 8 bits identifying a B-channel time slot in the telephony or ISDN area. Therefore, with the 1-byte content, connection lines with a maximum of 8 telephony connections or 4 ISDN connections or suitable combinations of both connections can be operated. In further refinements, lines with correspondingly more telephony and / or ISDN connections can also be operated with 2 or more bytes.
- the order of the bits in the byte or bytes continuously corresponds to the order of the B-channel time slots in the SDSL frame.
- B channels temporarily assigned to the ATM area and to be re-assigned are identified by 1, whereas channels in the basic setting for telephony or ISDN or channels to be switched back are identified by 0.
- the list is reflected by NT.
- the switchover procedure following the assignment procedure is bit-controlled, so that the conventional duration of the telephony and ISDN connection establishment is not perceptibly extended by the switchover and is frame-synchronous, so that no data loss occurs in the existing ATM connection.
- the sequence of the switchover procedure is illustrated in an example in FIGS. 6, 8, 9 and 10.
- the communication between LT and NT takes place via 2 cyclic redundancy checks (error detection with cyclic code) - CRC-secured bits in the area OH of the SDSL frame, preferably bit no. 24 and no. 36, the bit meanings in the upstream and downstream Frames are independent of each other.
- cyclic redundancy checks error detection with cyclic code
- the ETSI and ITU standard have so far not used both bit positions.
- Bit24 / Bit36 1/0, "Sync Response" - synchronization response.
- the starting point for the later determination of the sending or receiving time of the first upstream frame with a new channel structure in NT or LT is now also fixed in NT or LT.
- LT counts the SDSL frames starting with the first frame sent with Sync Demand up to and including the last frame before sending Sync Confirmation and thus knows for LT the reference time T Re f that is decisive for sending and receiving the first frame with the new channel assignment.
- NT also determines the reference time T Re f by counting the frames starting with the first arriving frame with Sync Demand up to and including the last frame before the arrival of Sync Confirmation.
- the reference time is defined as the time between the transmission of the frame with the LT message Sync Demand and the transmission of the frame with the LT message Sync Confirmation.
- T Re f thus initially contains the loop runtime between LT and NT, the time for CRC evaluation and transmission frame formation without a new channel assignment in the NT, and the time for CRC evaluation and transmission frame formation without new channel assignment. in the LT - cf.
- Figure 7 with the example of a frame control unit.
- T Re f The main purpose of T Re f is to define the switching times for the frames with the new channel structure at the end of the procedure.
- the frame formation is extended by additional circuit steps to convert to the changed channel structure in LT and NT. This is taken into account in T Re f by inserting additional time intervals.
- additional intervals can be different in size depending on the respective, also manufacturer-specific, HW / SW implementation in the LT and in the NT. To ensure interoperability, both additional intervals can be configured separately according to the invention.
- LT and NT send or receive the first new frames according to the invention at a time interval 2 T Ref according to the previously defined reference points.
- the times for frame switching in the upstream direction and downstream direction are defined in LT and NT by sending and receiving the same frame in each case, so they ensure a frame-synchronous switching.
- T R ⁇ f Another advantage of the extension of T R ⁇ f according to the invention by the time components for switching over to changed channel assignment is that the message exchange has ended by a time advantage up to the predetermined switchover time 2 T R ⁇ f until the execution confirmation described below.
- This time advantage forms a buffer when the procedure is delayed due to transmission interference.
- the phase described so far represents the synchronization phase of the switchover procedure, at the end of which the switchover times to the frames with the new channel assignment for both LT and NT are fixed on both sides.
- the synchronization phase is followed by the execution phase with the actual frame switching, cf. Figure 6.
- LT or NT no longer abort the switchover procedure in the case of a CRC alarm.
- the LT thus confirms that NT is to be switched to the new frames at the predetermined transmission and reception times, and determines that NT will withdraw the confirmation of execution with this switch.
- the new frame is formed and transmitted immediately after the end of the CRC alarm and detection of Exec Ack.
- the predetermined switching times are retained in the NT.
- the NT receives frames with the old instead of the expected new channel structure in the time between its own predetermined switching time and the switchover time delayed in the LT by the disturbed line.
- This downstream frame interference caused by the line interference does not affect the existing telephony and ISDN connections, since their channel assignment - downstream and upstream - is not changed. It also ended with the arrival of the new structure in the NT at the end of the transmission disturbance "self-healing".
- LT switches over to receiving new frames with a delay as soon as at least one valid frame with Exec Ack, or - due to the frame change in NT - received with Exec Ack New during a fault-free break in the transmission interference. In this way, the upstream frame disturbance caused by the line fault is self-healing in the LT as well.
- LT acknowledges the recognition of Exec Ack New in the same way as the recognition of Exec Ack with the transmission of Exec Complete and ends the procedure with the transmission of Done after the frame switchover and return to idle status. After receiving Complete or Done from CRC, NT sends the Done message to LT and returns to idle status.
- the likelihood of a frame disturbance can be further reduced to any extent.
- a transmission disturbance has no effect on the frame switchover if Exec Ack delays but before the switchover time defined by T Ref point in the LT is recognized.
- T Re f is therefore extended in a further embodiment by a configurable buffer time and thus the likelihood of frame disturbances is arbitrarily reduced.
- the probability of interference is reduced by the fact that the buffer time is extended by integer configurable multiples of T Re f by shifting the switchover time to new frames.
- the duration of the undisturbed procedure is approximately 2.5 T Re f. With 4 frame lengths per T Re f with complete implementation in HW and the SDSL frame length of 6 ms, this results in a time period of 60 ms for the bit-controlled procedure without loop runtime, that is to say on short connecting lines. This is briefly related to the normal telephony or ISDN connection establishment in the multi-second range.
- a solution for dynamic channel allocation in ADSL transport is specified.
- the time-division-based services are preferred because of their channel orientation as "Channelized Voice over DSL" - CVoDSL.
- the standardization of CVoDSL is currently carried out with the emerging ITU standard G.Voice. This is mainly because CVoDSL avoids the time and effort involved in ATM-based voice communication, VoDSL (Voice over DSL).
- the ADSL framework can be divided into nested (technically: “interleaved") and non-nested ("non-interleaved") parts.
- the non-nested part is - in principle, as with SDSL - divided into areas for CVoDSL and ATM, whereby the individual CVoDSL channels for telephony and ISDN are defined by their position in the ADSL frame. are marked and are preset when configuring an ADSL connection.
- a CVoDSL channel which - as with SDSL - is characterized by a message for establishing or ending a connection, is connected to the ATM area or switched back to the CVoDSL area.
- Commands of the EN 300 324-1 standard are used according to the invention for triggering the procedures for channel connection to the ATM connection and for channel switching back to the telephony or ISDN area, as with SDSL.
- these are "Disconnect”, “Deactivate”, “Establish” and “Activate”.
- This definition has the advantage that the same connection signaling can be used for CVoDSL and VoDSL transport, since the signaling for VoDSL is already standardized according to EN 300 324-1.
- an HDLC channel in the overhead area of the ADSL frame was already proposed for ITV for ITU. See ITU document IC-045, 2001. This channel is used for the transmission of the channel assignment commands according to the invention.
- the procedure described in FIG. 6 is based on the frame length 17 ms for ADSL compared to 6 ms for SDSL. It therefore takes around three times as long as with SDSL, i.e. around 180 ms, under otherwise identical conditions. This value is also briefly over connection establishment times of several seconds.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Time-Division Multiplex Systems (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10122419 | 2001-05-09 | ||
| DE10122419A DE10122419B4 (de) | 2001-05-09 | 2001-05-09 | Verfahren zur dynammischen Kanalzuordnung |
| PCT/DE2002/001473 WO2002091791A1 (de) | 2001-05-09 | 2002-04-22 | Verfahren zur dynamischen kanalzuordnung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1386517A1 true EP1386517A1 (de) | 2004-02-04 |
Family
ID=7684088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02740278A Withdrawn EP1386517A1 (de) | 2001-05-09 | 2002-04-22 | Verfahren zur dynamischen kanalzuordnung |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20050101266A1 (de) |
| EP (1) | EP1386517A1 (de) |
| CN (1) | CN1524396A (de) |
| DE (1) | DE10122419B4 (de) |
| WO (1) | WO2002091791A1 (de) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6990110B2 (en) | 2001-04-12 | 2006-01-24 | Adc Dsl Systems, Inc. | Automatic permanent virtual circuit connection activation for connection oriented networks |
| US6810041B2 (en) * | 2001-07-13 | 2004-10-26 | Adc Dsl Systems, Inc. | Integrated access device |
| US7170894B2 (en) | 2001-12-22 | 2007-01-30 | Adc Dsl Systems, Inc. | Establishment of an end to end virtual connection |
| DE102004010991B4 (de) * | 2004-03-03 | 2007-05-10 | Detewe Systems Gmbh | Telekommunikationseinrichtung |
| EP1814278B1 (de) * | 2006-01-27 | 2009-04-08 | Siemens Aktiengesellschaft | Verfahren zur Zuordnung von zumindest einer Nutzdatenverbindung zu zumindest einer Multiplexverbindung |
| CN101192849B (zh) * | 2006-11-20 | 2010-10-27 | 华为技术有限公司 | 一种信道矩阵的管理方法及其装置 |
| CN101848404A (zh) * | 2009-03-27 | 2010-09-29 | 华为技术有限公司 | Dsl系统中同步信息传输的方法、dsl系统和设备 |
| WO2016166532A1 (en) | 2015-04-13 | 2016-10-20 | Richard Clucas | Encoding a plurality of signals with data rate target of a signal depending on complexity information |
| WO2018064838A1 (zh) | 2016-10-09 | 2018-04-12 | 武汉芯泰科技有限公司 | 一种混合时分复用机制 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1076551C (zh) * | 1993-04-06 | 2001-12-19 | 开创集成系统公司 | 用于在单条内部双绞线上操作的家庭及小公司电话系统 |
| US6885652B1 (en) * | 1995-06-30 | 2005-04-26 | Interdigital Technology Corporation | Code division multiple access (CDMA) communication system |
| JP3382806B2 (ja) * | 1997-02-13 | 2003-03-04 | 日本電気株式会社 | 子無線局 |
| CA2286803A1 (en) * | 1997-04-18 | 1998-10-29 | Siemens Aktiengesellschaft | Method for subscriber information transfer in a local line distribution network |
| DE19730621A1 (de) * | 1997-07-17 | 1999-01-21 | Alsthom Cge Alcatel | Verfahren zum Übertragen von Daten auf einer ISDN-Anschlußleitung, sowie Leitungsabschlußeinheit, Vermittlungsstelle, Netzabschlußeinheit und Datenendgerät dafür |
| US6009106A (en) * | 1997-11-19 | 1999-12-28 | Digi International, Inc. | Dynamic bandwidth allocation within a communications channel |
| US20060062250A1 (en) * | 1998-06-26 | 2006-03-23 | Payne William A Iii | Method for wireless access system supporting multiple frame types |
| EP1081981B1 (de) * | 1999-03-16 | 2010-12-29 | Mitsubishi Denki Kabushiki Kaisha | Dynamische Veränderung der Datenrate |
| US20040028071A1 (en) * | 1999-09-10 | 2004-02-12 | Interval Research Corporation, A Washington Corporation | Apparatus and method for managing variable-sized data slots with timestamp counters within a TDMA frame |
| JP3796233B2 (ja) * | 2003-05-23 | 2006-07-12 | 三洋電機株式会社 | 伝送速度変更方法およびそれを利用した基地局装置 |
-
2001
- 2001-05-09 DE DE10122419A patent/DE10122419B4/de not_active Expired - Fee Related
-
2002
- 2002-04-22 US US10/477,290 patent/US20050101266A1/en not_active Abandoned
- 2002-04-22 WO PCT/DE2002/001473 patent/WO2002091791A1/de not_active Ceased
- 2002-04-22 EP EP02740278A patent/EP1386517A1/de not_active Withdrawn
- 2002-04-22 CN CNA028136241A patent/CN1524396A/zh active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO02091791A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10122419B4 (de) | 2007-11-08 |
| US20050101266A1 (en) | 2005-05-12 |
| WO2002091791A1 (de) | 2002-11-14 |
| DE10122419A1 (de) | 2002-11-21 |
| CN1524396A (zh) | 2004-08-25 |
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