Source: http://www.google.com/patents/USRE40777?dq=%22Meaning-based+advertising+and+document+relevance+determination%22
Timestamp: 2016-05-25 02:21:57
Document Index: 587250524

Matched Legal Cases: ['art 1', 'art 2', 'art 3', 'art 4', 'art 5', 'art 6', 'art 7', 'art 8', 'art 9']

Patent USRE40777 - Air interface for telecommunications systems with cordless ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsIn order to improve the performance of physical channels in telecommunications systems using wire-free telecommunication between mobile and/or stationary transmitting/receiving appliances as a function of; the channel data transmission rate, the system environment, the system utilization and the distance...http://www.google.com/patents/USRE40777?utm_source=gb-gplus-sharePatent USRE40777 - Air interface for telecommunications systems with cordless telecommunications between mobile and/or stationary transmitting receiving devicesAdvanced Patent SearchPublication numberUSRE40777 E1Publication typeGrantApplication numberUS 11/150,605PCT numberPCT/DE1999/001909Publication dateJun 23, 2009Filing dateJun 30, 1999Priority dateJun 30, 1998Fee statusPaidAlso published asCA2336275A1, CA2336275C, CN1308799A, CN1829135A, CN1829135B, DE59909478D1, DE59911509D1, EP1092296A2, EP1092296B1, EP1422860A1, EP1422860B1, US6816507, WO2000002401A2, WO2000002401A3Publication number11150605, 150605, PCT/1999/1909, PCT/DE/1999/001909, PCT/DE/1999/01909, PCT/DE/99/001909, PCT/DE/99/01909, PCT/DE1999/001909, PCT/DE1999/01909, PCT/DE1999001909, PCT/DE199901909, PCT/DE99/001909, PCT/DE99/01909, PCT/DE99001909, PCT/DE9901909, US RE40777 E1, US RE40777E1, US-E1-RE40777, USRE40777 E1, USRE40777E1InventorsLutz Jarbot, Holger Landenberger, Albrecht Kunz, Markus NasshanOriginal AssigneeNokia Siemens Networks Gmbh & Co. KgExport CitationBiBTeX, EndNote, RefManPatent Citations (11), Non-Patent Citations (18), Referenced by (4), Classifications (22), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetAir interface for telecommunications systems with cordless telecommunications between mobile and/or stationary transmitting receiving devices
US RE40777 E1Abstract
In order to improve the performance of physical channels in telecommunications systems using wire-free telecommunication between mobile and/or stationary transmitting/receiving appliances as a function of; the channel data transmission rate, the system environment, the system utilization and the distance between the transmitting/receiving appliances, such that no circuitry changes are required to the transmitters and/or receivers in the transmitting/receiving appliances, an air interface is proposed, in which the number of NPILOT bits, NTPC bits and NTFC1 bits are each variable, and in which, in particular during an active or passive telecommunications link between the mobile and/or stationary transmitting/receiving appliances in the telecommunications system, the number of NPILOT bits, NTPC bits and NTFC1 bits can each be varied and/or optimized adaptively by control means, such as by suitable “layer 2” or “layer 3” signaling (“layer 2/3” signaling) which takes place, for example, via the DPDCH channel.
1. An air interface for telecommunications systems utilizing wireless telecommunication between at least one of stationary transmitting/receiving units and mobile transmitting/receiving units, comprising:
9. An air interface for wireless telecommunications systems between devices comprising:
a first layer including at least one first physical channel and at least one second physical channel, wherein at least one time slot of a time frame structure of the telecommunications system is allocated to the first layer for each telecommunications link, and wherein the second channel includes a user data field with user data; a first data field, contained within a channel field for channel estimation using channel estimation data; a second data field for power control using power control data; a third data field for traffic format channel indication using traffic format channel indication data; a second layer which is responsible for data security and/or a third layer which is responsible for switching of the air interface, each second and/or third layer containing control means that access the physical channels in such a way that a distribution of the data in the data fields during the telecommunications link can be varied adaptively in the uplink and/or downlink telecommunications directions. 10. The air interface as claimed in claim 9, wherein the control means accesses the physical channels in such a way that the distribution of the data is changed adaptively while the amount of data in the user data field remains the same and the total amount of data in each time slot remains the same.
11. The air interface as claimed in claim 10, wherein the control means accesses the physical channels in such a way that the distribution of the data is changed adaptively by adaptation to characteristics of the telecommunications link.
12. The air interface as claimed in claim 9, wherein the control means accesses the physical channels in such a way that the distribution of the data is changed adaptively by increasing the total amount of data in each time slot.
13. The air interface as claimed in claim 9, wherein the control means accesses the physical channels in such a way that the distribution of the data is changed adaptively with the total amount of data in each time slot remaining the same in that data in the data fields is allocated to the second channel, or data in the user data field is allocated to the first channel.
14. The air interface as claimed in claim 11, wherein the control means accesses the physical channels in such a way that a number of data items in the first data field is reduced in favor of the number of data items in the second data field and/or the third data field if, as a first characteristic of the telecommunications link, a mobile transmitting/receiving appliance is moving at a low speed of less than 5 km/h.
15. The air interface as claimed in claim 11, wherein the control means accesses the physical channels in such a way that a number of data items in the second data field is reduced in favor of the number of data items in the first data field and/or the third data field if, as a second characteristic of the telecommunications link, a mobile transmitting/receiving appliance is moving at a high speed of more than 100 km/h.
16. The air interface as claimed in claim 12, wherein the total amount of data per time slot in a telecommunications system based on code division multiplex can be increased by reducing a spread factor among time slots.
17. The air interface as claimed in claim 9, wherein the telecommunications system can be operated in the FDD and/or TDD mode.
18. The air interface as claimed in claims 9, wherein the telecommunications system can be operated in a broadband mode.
19. The air interface as claimed in claim 9, wherein the control means accesses the physical channels in such a way that the distribution of the data is varied by increasing the total amount of data per time slot.
20. The air interface as claimed in claim 9, wherein the control means accesses the physical channels in such a way that the distribution of the data is varied, with the total amount of data per time slot remaining constant, in that data in the data fields are allocated to the second channel, or data in the user data field are allocated to the first channel.
1) the message processing and message transmission can take place in a preferred transmission direction (simplex mode) or in both transmission directions (duplex mode), 2) the message processing is preferably digital, 3) the message transmission takes place over the long-distance transmission path without wires on the basis of various message transmission methods for multiple use of the message transmission path FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access) and/or CDMA (Code Division Multiple Access)—for example in accordance with radio standards such as DECT [Digital Enhanced (previously: European) Cordless Telecommunication; see Nachrichtentechnik Elektronik 42 (1992) [Information Technology Electronics 42 (1992)] Jan./Feb. No. 1, Berlin, DE; U. Pilger “Struktur des DECT-Standards” [Structure of the DECT Standard], pages 23 to 29 in conjunction with the ESTI publication ETS 300175-1 . . . 9; Oct. 1992 and the DECT publication from the DECT Forum, February 1997, pages 1 to 16], GSM [Groupe Sp�ciale Mobile or Global System for Mobile Communication; see Informatik Spektrum 14 [Information Spectrum 14] (1991) June, No. 3, Berlin, DE; A. Mann: “Der GSM-Standard—Grundlage f�r digitale europ�ische Mobilfunknetze” [The GSM Standard—basis for digital European mobile radio networks], pages 137 to 152 in conjunction with the publication telekom praxis [Telecom Practice] 4/1993, P. Smolka “GSM-Funkschnittstellel—Elemente und Funktionen” [GSM air interface—elements and functions], pages 17 to 24], UMTS [Universal Mobile Telecommunication System; see (1): Nachrichtentechnik Elektronik [Information Technology Electronics], Berlin 45, 1995, Issue 1, pages 10 to 14 and Issue 2, pages 24 to 27; P. Jung, B. Steiner: “Konzept eines CDMA-Mobilfunksystems mit gemeinsamer Detektion f�r die dritte Mobilfunkgeneration” [Concept of a CDMA mobile radio system with joint detection for the third mobile radio generation]; (2): Nachrichtentechnik Elektronik [Information Technology Electronics], Berlin 41, 1991, Issue 6, pages 223 to 227 and page 234; P. W. Baier, P. Jung, A. Klein: “CDMA—ein g�nstiges Vielfachzugriffsverfahren f�r frequenzselektive und zeitvariante Mobilfunkkan�le” [CDMA—a useful multiple access method for frequency-selective and time-variant mobile radio channels]; (3) IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, Vol. E79-A, No. 12, December 1996, pages 1930 to 1937; P. W. Baier, P. Jung: “CDMA Myths and Realities Revisited”; (4): IEEE Personal Communications, February 1995, pages 38 to 47; A. Urie, M. Streeton, C. Mourot: “An Advanced TDMA Mobile Access System for UMTS”; (5): telekom praxis [Telecom Practice], 5/1995, pages 9 to 14; P. W. Baier: “Spread-Spectrum-Technik und CDMA—eine urspr�nglich milit�rische Technik erobert den zivilen Bereich” [Spread-spectrum technology and CDMA—an originally military technology conquers the civil area]; (6): IEEE Personal Communications, February 1995, pages 48 to 53; P. G. Andermo, L. M. Ewerbring: “A CDMA-Based Radio Access Design for UMTS”; (7): ITG Fachberichte 124 [ITG Specialist Reports] (1993), Berlin, Offenbach: VDE Verlag ISBN 3-8007-1965-7, pages 67 to 75; Dr. T. Zimmermann, Siemens A G: “Anwendung von CDMA in der Mobilkommunikation” [Use of CDMA in mobile communication]; (8); telcom report 16, (1993), Issue 1, pages 38 to 41; Dr. T. Ketseoglou, Siemens A G and Dr. T. Zimmermann, Siemens A G: “Effizienter Teilnehmerzugriff f�r die 3. Generation der Mobilkommunikation—Vielfachzugriffsverfahren CDMA macht Luftschnittstelle flexibler” [Efficient subscriber access for the 3rd generation of mobile communication—the CDMA multiple access method makes the air interface more flexible]; (9): Funkschau [Radio Show] 6/98: R. Sietmann “Ringen um die UMTS-Schnittstelle” [Ring around the UMTS interface], pages 76 to 81] WACS or PACS, IS-54, IS-95, PHS, PDC, etc. [see IEEE Communications Magazine, January 1995, pages 50 to 57; D. D. Falconer et al.: “Time Division Multiple Access Methods for Wireless Personal Communications”]. “Message” is a generic term, which covers both the information and the physical representation (signal). Despite a message having the same information, different signal forms may occur. Thus, for example, a message relating to a subject may be transmitted
For WCDMA/FDD operation of the universal mobile telecommunications system, the air interface of the telecommunications system in each case contains a number of physical channels in the uplink and downlink telecommunications directions in accordance with the document ETSI STC SMG2 UMTS-L1, Tdoc SMG2 UMTS-L1 163/98: “UTRA Physical Layer Description FDD Parts” Vers. 0.3, May 29, 1998 of which a first physical channel, the so-called Dedicated Physical Control CHannel DPCCH and a second physical channel, the so-called Dedicated Physical Data CHannel DPDCH, [lacuna] with respect to a “three-layer structure” composed of 720 ms long (TMZR=720 ms) super frames MZR, 10 ms long (TFZR=10 ms) time frames (radio frames) ZR and 0.625 ms long (TZS=0.625 ms) time slots ZS, which are illustrated in FIGS. 1 and 2. Each super frame MZR contains, for example, 72 time frames ZR, while each time frame ZR in turn has, for example, 16 time slots ZS1 . . . ZS16. As a burst structure for the first physical channel DPCCH, the individual time slot ZS, ZS1 . . . ZS16 (burst) has a pilot sequence PS with a number NPILOT of bits (NPILOT bits) for channel estimation, a TPC sequence TPCS with a number NTPC of bits (NTPC bits), in particular for rapid power control (Traffic Power Control), and a TFCI sequence TFCIS with a number NTFC1 of bits (NTFC1 bits) for traffic format channel indication, which indicate the bit rate, the type of service, the type of error protection coding, etc., and, for the second physical channel DPDCH, has a user data sequence NDS with a number NDATA of user data bits (NDATA bits). Table 1, below, contains the bit values specified in table 3.2.2-4 by the ARIB in the ARIB publication “Specifications of Air-Interface for a 3G Mobile System”, Volume 3, June 1998 for the DPDCH channel and the DPCCH channel with the bit subdivisions NPILOT, NTPC, NTFC1 for channel bit rates of 64 and 128 kbit/s, respectively.
NTFC1 NTPC NPILOT 64
In the “downlink” (downward telecommunications direction; radio link from the base transceiver station to the mobile station) in the WCDMA/FDD system from ESTI and ARIB—FIG. 1—the first physical channel [“Dedicated Physical Control Channel (DPCCH)] and the second physical channel [“Dedicated Physical Data Channel (DPDCH)] are time-division multiplexed while, in the “uplink” (upward telecommunications direction; radio link from the mobile station to the base transceiver station)—FIG. 2—I/Q multiplexing is used, in which the second physical channel DPDCH is transmitted in the I channel, and the first physical channel DPCCH is transmitted in the Q channel.
For TDCDMA/TDD operation of the universal mobile telecommunications system, the air interface of the telecommunications system in the uplink and downlink telecommunications directions is once again based, in accordance with the document TSG RAN WG1 (S1.21): “3rd Generation Partnership Project (3GPP)” Vers. 0.0.1, 1999-01, on the “three-layer structure” consisting of the super frames MZR, the time frames ZR and the time slots ZS, for all the physical channels, which is illustrated in FIG. 3. Each super frame MZR in turn contains, for example, 72 time frames, while each time frame ZR in turn has, for example, the 16 time slots ZS1 . . . ZS16. The individual time slot ZS, ZS1 . . . ZS16 (burst) has either, in accordance with the ARIB proposal, a first time slot structure (burst structure) ZSS1 in the sequence comprising a first user data sequence NDS1 with NDATA1 bits, the pilot sequence PS with NPILOT bits for channel estimation, the TPC sequence TPCS with NTPC bits for power control, the TFCI sequence TFCIS with NTFC1 bits for traffic format channel indication, a second user data sequence NDS2 with NDATA2 bits and a guard period SZZ with NGUARD bits or, in accordance with the ETSI proposal, a second time slot structure (burst structure) ZSS2 in the sequence comprising the first user data sequence NDS1, a first TFCI sequence TFCIS1, a midamble sequence MIS for channel estimation, a second TFCI sequence TFCIS2, the second user data sequence NDS2 and the guard period SZZ.
The received bit sequence is decoded channel-by-channel in a channel codec KC. Depending on the channel, the bit information is assigned to the monitoring and signaling time slot or to a voice time slot and—in the case of the base transceiver station (FIG. 5)—the monitoring and signaling data and the voice data for transmission to the base transceiver station controller BSC are jointly transferred to an interface SS which is responsible for signaling and voice coding/decoding (voice codec), while—in the case of the mobile station (FIG. 6)—the monitoring and signaling data are transferred to a control and signaling unit STSE, which is preferably in the form of a microprocessor μP and is responsible for all the mobile station signaling and control, and the voice data are transferred to a voice codec SPC which is designed for voice inputting and outputting. The microprocessor μP contains a program module PGM which is designed on the basis of the ISO layer model [see: Unterrichtsblatter [Training sheets]—Deutsche Telekom, Year 48, 2/1995, pages 102 to 111] and in which the air interface protocol for the UMTS scenario is handled. Of the layers defined in the layer model, only the first four layers, which are essential for the mobile station, are shown; a first layer S1, a second layer S2, a third layer S3 and a fourth layer S4, with the first layer S1 containing, inter alia, the DPCCH channel and the DPDCH channel.
The base transceiver station BTS1, BTS2 is controlled entirely in a control unit STE, which is preferably in the form of a microprocessor μP. The microprocessor μP once again contains the program module PGM which is designed on the basis of the ISO layer model [see: Unterrichtsbl atter—Deutsche Telekom, Year 48, 2/1995, pages 102 to 111] and in which the air interface protocol for the UMTS scenario is handled. Of the layers defined in the layer model, once again only the first four layers, which are essential for the base transceiver station, are shown; the first layer S1, the second layer S2, the third layer S3 and the fourth layer S4, with the first layer S1 containing, inter alia, the DPCCH channel and the DPDCH channel.
In the downlink direction (transmission path), the base transceiver station BTS1, BTS2 transmits (via the transmitting antenna SAN), for example, at least one radio message FN with a frequency/time/code component to at least one of the mobile station MS1 through MS5, while, in the uplink direction (transmission path), the mobile station MS1 through MS5 transmits (via the common antenna ANT), for example, at least one radio message FN with a frequency/time/code component to at least one base transceiver station BTS1, BTS2.
The bit sequence obtained in the base transceiver on BTS1, BTS2 and in the mobile station MS1 through MS5 is converted into data symbols in in each case one data-to-symbol converter DSW. Subsequently, the data symbols are in each case spread in a spreading device SPE using a respectively subscriber-specific code. After this, in the burst generator BG which comprises a burst compiler BZS and a multiplexer MUX, a training information sequence in the form of a midamble is added to each of the spread data symbols in the burst compiler BZS, for channel estimation, and the burst information obtained in this way is placed in the correct time slot in the multiplexer MUX. Finally, the burst that has been obtained is in each case radio-frequency-modulated modulated in a modulator MOD and is digital/analog converted before the signal obtained in this way is transmitted as a radio message FN via a radio transmitting device FSE (transmitter) to the transmitting antenna SAN or to the joint antenna ANT.
One TDD telecommunications system which has such a transmission time frame is, for example, the known DECT system (Digital Enhanced (previously: European) Cordless [Information Technology Electronics] 42 (1992) Jan./Feb. No. 1, Berlin, DE; U. Pilger “Struktur des DECT-Standards” [Structure of the DECT Standard], pages 23 to 29 in conjunction with the ESTI publication ETS 300175-1 . . . 9, October 1992 and the DECT publication from the DECT Forum, February 1997, pages 1 to 16]. The DECT system has a DECT transmission time frame with a time duration of 10 ms, consisting of 12 downlink time slots and 12 uplink time slots. For any given bidirectional telecommunications link at a given frequency in the downlink transmission direction DL and in the uplink transmission direction UL, a free time slot pair with a downlink time slot and an uplink time slot is chosen, in accordance with the DECT Standard, in which the separation between the downlink time slot and the uplink time slot, likewise in accordance with the DECT Standard, is half the length (5 ms) of the DECT transmission time frame.
FDD telecommunications system (Frequency Division Duplex) are telecommunications systems in which the time frame, comprising a number of time slots, for the downlink transmission direction is transmitted in a first frequency band, and that for the uplink transmission direction is transmitted in a second frequency band.
One FDD telecommunications system which transmits the time frame in this way is, for example, the known GSM system [Groupe Sp�ciale Mobile or Global System for Mobile Communications; see Informatik Spektrum [Information Spectrum] 14 (1991) June, No. 3, Berlin, DE; A. Mann: “Der GSM-Standard—Grundlage f�r digitale europ�ische Mobilfunknetze” [The GSM Standard—basis for digital European mobile radio networks], pages 137 to 152 in conjunction with the publication telekom praxis [Telecom Practice] 4/1993, P. Smolka “GSM-Funkschnittstelle—Elemente und Funktionen” [GSM radio interface—elements and functions], pages 17 to 24].
The air interface for the GSM system knows a large number of logical channels, which are referred to as bearer services, for example an AGCH channel (Access Grant CHannel), a BCCH channel (BroadCast CHannel), an FACCH channel (Fast Associated Control CHannel), a PCH channel (Paging CHannel), an RACH channel (Random Access CHannel) and a TCH channel (Traffic CHannel), whose respective function in the air interface is described, for example, in the document Informatik Spektrum [Information Spectrum] 14 (1991) June, No. 3, Berlin DE; A. Mann: “Der GSM-Standard—Grundlage f�r digitale europ�ische Mobilfunknetze” [The GSM Standard—basis for digital European mobile radio networks], pages 137 to 152 in conjunction with the publication telekom praxis [Telecom Practice] 4/1993, P. Smolka “GSM-Funkschnittstelle—Elemente und Funktionen” [GSM radio interface—elements and functions], pages 17 to 24.
The quality of channel estimation, the functionality of rapid power control and the detection of the format bits are dependent on the numbers NPILOT, NTPC and NTFC1 and the energy in the respectively available bits.
The performance in the downlink and uplink directions may therefore be less than optimum for a chosen value triple NPILOT, NTPC and NTFC1.
If, for example, the number of NPILOT bits is too low, then too little energy is available for channel estimation. This causes “poor” channel estimation and/or a worse (higher) bit error rate in the receiver, that is to say the performance in the downlink and uplink directions is worse. A similar situation applies to NTPC bits for rapid power control and the NTFC1 bits for traffic format channel indication.
Normally, the value triple NPILOT, NTPC and NTFC1 is fixed for a specific channel bit rate and cannot be varied during a link or during the handover to a different area.
This object is in each case achieved by an air interface having a physical first layer (S1) of the air interface (PGM) that contains a first physical channel (DPCCH) and a second physical channel (DPDCH) in at least one time slot (ZS) of a time frame structure (ZR, MZR) of the telecommunications system for each telecommunications link which is allocated to the first layer (S1). The first channel (DPCCH) contains a first data field for channel estimation (PS)—using channel estimation data (NPILOT)—, a second data field for power control (TPCS)—using power control data (NTPC)—and a third data field for traffic format channel indication (TFCIS)—using traffic format channel indication data (NTFC1). Furthermore, the second channel (DPDCH) contains a user data field (NDS) with user data (NDATA, NDATA1, NDATA2) A second layer (S2) which is responsible for data security and/or a third layer (S3) which is responsible for switching, of the air interface (PGM) each contain control means (STM) which are designed to access the physical channels (DPCCH, DPDCH) such that the distribution of the data (NPILOT, NTPC/NTFC1) in the data fields (PS, TPCS, TFCIS) during the telecommunications link can be varied in the uplink and/or downlink telecommunications directions, by adaptation to characteristics of the telecommunications link. This is done while the amount of data in the user data field (NDS) and the total amount of data per time slot (ZS) remain constant.
The present invention proposes an air interface in which the number of NPILOT bits, NTPC bits and NTFC1 bits is in each case variable and in which, particularly while there is an active or passive telecommunications link between mobile and/or stationary transmitting/receiving appliances in the telecommunications system, the number of NPILOT bits, NTPC bits and NTFC1 bits can in each case be varied and optimized adaptively by control means, for example by suitable “layer 2” or “layer 3” signaling (“layer 2/3” signaling) which takes place, for example, via the DPDCH channel.
The distribution of the data, of the NPILOT bits, NTPC bits and NTFC1 bits, in the DPCCH channel can be varied by adaptation to characteristics of the telecommunications link, during the telecommunications link in the uplink and/or downlink telecommunications directions, with the amount of data in the DPDCH channel remaining constant and the amount of data per time slot remaining constant. The variation can in this case also be carried out to such an extent that at least one bit type of said bits temporarily (for example for the duration of the corresponding telecommunications link) does not occur in the DPCCH channel, that is to say the number of corresponding bits in the DPCCH channel is equal to zero. In another embodiment of the present invention, the distribution of the data, of the NPILOT bits, NTPC bits and NTFC1 bits, in the DPCCH channel can be varied during the telecommunications link in the uplink and/or downlink telecommunications directions by increasing the total amount of data per time slot.
Furthermore, in another embodiment of the present invention, the distribution of the data, of the NPILOT bits, NTPC bits and NTFC1 bits, in the DPCCH channel can be varied during the telecommunications link in the downlink telecommunications direction with the total amount of data per time slot remaining constant, in that some of the NPILOT bits, NTPC bits and NTFC1 bits in the DPCCH channel are allocated to the DPDCH channel, or some of the user bits (user data) in the DPDCH channel are allocated to the DPCCH channel.
Accordingly it is possible to increase or to decrease the number of NPILOT bits, NTPC bits and NTFC1 bits by omitting or adding user bits or user data in the DPDCH channel.
The present invention offers the advantage that—when a mobile transmitting/receiving appliance (a mobile station) is moving very slowly at a speed of less than 3 km/h (for example a data terminal with remote e-mail access) and when the channel estimation can be considerably improved on the basis of the above general basic considerations—the number of NPilot bits can be reduced without noticeably adversely affecting the quality of channel estimation. In this case, the number of NTFC1 bits for traffic format channel indication and/or the number of NTPC bits for rapid power control can be increased. Overall, this improves the performance of the telecommunications system both in the downlink direction and in the uplink direction.
This offers the advantage that—when, taking account of the above general basic considerations, a mobile transmitting/receiving appliance (a mobile station) is moving very fast at a speed of more than 150 km/h and when the rapid power control can no longer compensate for the Rayleigh fading (rapid fading, essentially caused by the movement of the mobile station) and, in consequence, only the log normal fading can still be controlled (slow fading, essentially caused by shadowing effects), in which case the log normal fading can be controlled using a considerably lower bit rate than that for rapid power control—the NTPC bits, for example, for rapid power control are now transmitted only in every tenth time slot. The NTPC bits for rapid power control are omitted in the other time slots. Additional NPILOT bits for channel estimation and/or NTFC1 bits for traffic format channel indication are then transmitted for this purpose.
Furthermore, the present invention offers the additional advantage that when a mobile transmitting/receiving appliance (a mobile station) is initially moving very slowly, the number of NPILOT bits, of NTFC1 bits and of NTPC bits used in this development is in each case used initially and that when—the mobile transmitting/receiving appliance (the mobile station) starts to move faster and faster, the number of NPilot bits, of NTFC1 bits and of NTPC bits used in this development is in each case used once a predetermined speed, for example 100 km/h, has been exceeded.
1. the distribution of the NPILOT bits in the pilot sequence PS, of the NTPC bits in the TPC sequence TPCS and of the NTFC1 bits in the TFCI sequence TFCIS during the telecommunications link in the uplink and/or downlink telecommunications directions can be varied by adaptation to characteristics of the telecommunications link, with the amount of data in the user data sequence NDS remaining constant, and with the total amount of data per time slot ZS remaining constant, and/or 2. the distribution of the NPILOT bits in the pilot sequence PS, of the NTPC bits in the TPC sequence TPCS and of the NTFC1 bits in the TFCI sequence TFCIS during the telecommunications link in the uplink and/or downlink telecommunications directions can be varied by increasing the total amount of data per time slot ZS, and/or 3. the distribution of the NPILOT bits in the pilot sequence PS, of the NTPC bits in the TPC sequence TPCS and of the NTFC1 bits in the TFCI sequence TFCIS during the telecommunications link in the uplink and/or downlink telecommunications directions can be varied, with the total amount of data per time slot ZS remaining constant, in that some of the NPILOT bits in the pilot sequence PS, of the NTPC bits in the TPC sequence TPCS and of the NTFC1 bits in the TFCI sequence TFCIS are allocated to the DPDCH channel, or some of the NDATA bits, of the NDATA1 bits and of the NDATA2 bits in the user sequence NDS are allocated to the DPCCH channel. Furthermore, it is possible for the control means STM to be designed in such a way and to access the physical channels DPCCH, DPDCH in layer 1 in such a way that
4. the number of NPILOT bits in the pilot sequence PS is reduced in favor of the number of NTPC bits in the TPC sequence TPCS and/or the number of NTFC1 bits in the TFCI sequence TFCIS when, as a first characteristic of the telecommunications link, the mobile transmitting/receiving appliance MS1 through MS5 is moving at a slow speed of significantly less than 5 km/h, and/or 5. the number of NTPC bits in the TPC sequence TPCS is reduced in favor of the number of NPILOT bits in the pilot sequence PS and/or the number of NTFC1 bits in the TFCI sequence TFCIS when, as a second characteristic of the telecommunications link, the mobile transmitting/receiving appliance MS1 . . . MS5 is moving at a high speed of significantly more than 100 km/h. Although various minor changes and modifications might be proposed by those skilled in the art, it will be understood that our wish is to include within the claims of the patent warranted hereon all such changes and modifications as reasonably come within our contribution to the art.
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