Title of Invention | "ENCAPSULATION OF DIVERSE PROTOCOLS OVER INTERNAL INTERFACE OF DISTRIBUTED RADIO BASE STATION" |
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Abstract | A radio base station (20) has an internal interface (26) which connects a radio equipment (22) and a radio equipment controller (24). At least one and preferably both of the example radio equipment (22) and radio equipment controller (26) comprises a framer (50, 70) which can be controlled for transmitting samples of different protocols over the internal interlace. The framer (50, 70) facilitates (1) time multiplexing of N number of frames of a first protocol over the internal interface; (2) inserting L number of samples of a second protocol into M number of the frames of the first protocol, and (3) inserting a paddifg sample into each frame of the first protocol which does not include a sample of the second protocol. The first protocol has a frame rate; the second protocol has a sample rate Which is different from the frame rate of the first protocol, and N is greater than L and M. In any of plural example modes, the padding sample can comprise either of uninterpreted information or information related to the second protocol. For example, the padditg sample can comprise a parity value for the L number of samples of the second protocol. In another embodiment and method of operation, in a distributed radio base station a radio equipment controller (24) sums different carriers and transfers a wide band signal over the internal interface. |
Full Text | ENCAPSULATION OF DIVERSE PROTOCOLS OVER INTERNAL INTERFACE OF DISTRIBUTED RADIO BASE STATION [0001] This application claims the benefit and priority of the following United States Provisional Patent Applications, all of which are incorporated herein by reference: (1) U. S. Provisional Application 60/520, 323, entitled"Encapsulation of Diverse Protocols Over Internal Interface of Distributed Radio Base Station" ; (2) U. S. Patent Application 60/520,324, entitled"Encapsulation of Independent Transmissions Over Internal Interface of Distributed Radio Base Station" ; (3) U. S. Patent Application 60/520,364, entitled"Interface, Apparatus, and Method for Cascaded Radio Units In A Main-Remote Radio Base Station" ; and, (4) U. S. Patent Application 60/520,325, entitled"Pre-Start-Up Procedure For Internal Interface of Distributed Radio Base Station". This application is related to the following simultaneously filed United States Patent applications, all of which are incorporated by reference herein in their entirety: (1) U. S. Patent Application 10/909,836, entitled"Encapsulation of Independent Transmissions Over Internal Interface of Distributed Radio Base Station" ; and (2) U. S. Patent Application 10/909,843, entitled"Pre-Start-Up Procedure For Internal Interface of Distributed Radio Base Station". BACKGROUND [0002] FIELD OF THE INVENTION [0003] This application is related to radio access networks involved in wireless telecommunications, and particularly relates to an internal interface (such as the Common Public Radio Interface (CPRI) ) of a radio base station which links a radio equipment portion of the radio base station to a radio equipment control portion of the base station. [0004] RELATED ART AND OTHER CONSIDERATIONS [0005] In a typical cellular radio system, wireless user equipment units (UEs) communicate via a radio access network (RAN) to one or more core networks. The user equipment units (UEs) can be mobile stations such as mobile telephones ("cellular"telephones) and laptops with mobile termination, and thus can be, for example, portable, pocket, hand-held, computer-included, or car-mounted mobile devices which communicate voice and/or data with radio access network. Alternatively, the wireless user equipment units can be fixed wireless devices, e. g., fixed cellular devices/terminals which are part of a wireless local loop or the like. [0006] The radio access network (RAN) covers a geographical area which is divided into cell areas, with each cell area being served by a radio base station. A cell is a geographical area where radio coverage is provided by the radio equipment at a base station site. Each cell is identified by a unique identity, which is broadcast in the cell. The radio base stations communicate over the air interface (e. g. , radio frequencies) with the user equipment units (UE) within range of the base stations. In the radio access network, several base stations are typically connected (e. g. , by landlines or microwave) to a control node known as a base station controller (BSC) or radio network controller (RNC). The control node supervises and coordinates various activities of the plural radio base stations connected thereto. The radio network controllers are typically connected to one or more core networks. [0007] One example of a radio access network is the Universal Mobile Telecommunications (UMTS) Terrestrial Radio Access Network (UTRAN). The UMTS is a third generation system which, at least in some respects, builds upon the radio access technology known as Global System for Mobile communications (GSM) developed in Europe. UTRAN is essentially a radio access network providing wideband code division multiple access (WCDMA) to user equipment units (UEs). [0008] In many radio access networks the radio base station is a concentrated node with essentially most of the components being located at concentrated site. In the future mobile network operators may be afforded more flexibility if the radio base station is configured with a more distributed architecture. For example, a distributed radio base station can take the form of one or more radio equipment portions that are linked to a radio equipment control portion over a radio base station internal interface. [0009] One example of an internal interface of a radio base station which links a radio equipment portion of the radio base station to a radio equipment control portion of the base station is the Common Public Radio Interface (CPRI). The Common Public Radio Interface (CPRI) is described in Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1. 1 (May 10,2004), and which are incorporated by reference herein in their entirety. [00010] The Common Public Radio Interface (CPRI) is time multiplexed with one frame per WCDMA chip period, i. e. a frame rate of 3.84 Mframes/s. Each CPRI frame can carry one or more samples. But other protocols, i. e. , protocols other than WCDMA, have other frame or chip rates. The Common Public Radio Interface (CPRI) therefore does not invite transfer of samples for other protocols. [00011] What is needed therefore, and an object of the present invention, is a technique for rendering an internal interface of a radio base station node compatible with diverse protocols. BRIEF SUMMARY [00012] A radio base station has an internal interface which connects a radio equipment (RE) and a radio equipment controller (REC). At least one and preferably both of the example radio equipment (RE) and radio equipment controller (REC) comprises a framer which can be controlled for transmitting samples of different protocols over the internal interface. The framer facilitates (1) time multiplexing of N number of frames of a first protocol over the internal interface; (2) inserting L number of samples of a second protocol into M number of the frames of the first protocol, and (3) inserting a padding sample into each frame of the first protocol which does not include a sample of the second protocol. The first protocol has a frame rate; the second protocol has a sample rate which is different from the frame rate of the first protocol, and N is greater than L and M. [00013] In illustrated, representative, non-limiting example modes, the internal interface is a Common Public Radio Interface (CPRI) and the frame rate of the first protocol is 3.84 Mframes/second. [00014] In a first such example mode, the sample rate of the second protocol (e. g., CDMA 2000) is 3.6864 Mchips/second, with N being 25 and L and M being 24. [00015] In a second example mode, the sample rate of the second protocol (e. g., CDMA One) is 1.2288 Mchips/second, with N being 25 and L being 8. As one implementation of this second mode, M is 8, and the M number of frames of the first protocol are the first, fourth, seventh, tenth, thirteenth, sixteenth, nineteenth, and twenty second frames. [00016] In a third example mode, the sample rate of the second protocol (e. g., CDMA One) is 1.2288 Mchips/second, and the framer uses the second protocol for K number of carriers whereby samples for each carrier of the second protocol are included in M/K number of frames of the first protocol. As one example implementation of this third mode, K is 3, N is 25, and M is 24. [00017] In a fourth example mode, the sample rate of the second protocol (e. g., CDMA One) is 1.2288 Mchips/second, and each sample of the second protocol has J number of bits. The framer includes the J number of bits of each second protocol sample in F number of frames of the first protocol, J and F being integers. In an example implementation of the fourth mode, N is 25, L is 8; J is 14, and F is 3, and at least some of the M number of frames of the first protocol have J/F bits. [00018] In any of the example modes, the padding sample can comprise either of uninterpreted information or information related to the second protocol. For example, the padding sample can comprise a parity value for the L number of samples of the second protocol. [00019] In another embodiment and method of operation, in a distributed radio base station a radio equipment controller (REC) sums different carriers and transfers a wide band signal over the internal interface. BRIEF DESCRIPTION OF THE DRAWINGS [00020] Fig. 1 is a schematic view of an example embodiment of a distributed radio base station. [00021] Fig. 2 is a diagrammatic view of a protocol overview for an interface between radio equipment controller (REC) 22 and a radio equipment (RE) 24. [00022] Fig. 3A is a diagrammatic view of basic frame structure for one example data rate for use over an internal interface for the distributed base station. [00023] Fig. 3B is a diagrammatic view of a hyperframe structure for one example implementation. [00024] Fig. 3C is an enlargement of a portion of Fig. 3B. [00025] Fig. 4 is a schematic view of selected aspects of an example radio equipment (RE) portion of the distributed radio base station of Fig. 1. [00026] Fig. 5 is a schematic view of selected aspects of a radio equipment controller (REC) portion of the distributed radio base station of Fig. 1. [00027] Fig. 6 is a schematic view of selected aspects of a framer for either a radio equipment controller (REC) or a radio equipment (RE). [00028] Fig. 7 is a diagrammatic view of a first mode of transmitting samples of different protocols over the internal interface. [00029] Fig. 8 is a diagrammatic view of a second mode of transmitting samples of different protocols over the internal interface. [00030] Fig. 9 is a diagrammatic view of a third mode of transmitting samples of different protocols over the internal interface. [00031] Fig. 10 is a diagrammatic view of a fourth mode of transmitting samples of different protocols over the internal interface. [00032] Fig. 11 is a schematic view of a distributed radio base station wherein a radio equipment controller (REC) sums different carriers and transfers a wide band signal over the internal interface. [00033] Fig. 12 is a diagrammatic view showing an example embodiment of a distributed radio base station which has a cascading of radio equipments. [00034] Fig. 13A is a diagrammatic view showing several internal interface physical links connecting a radio equipment controller (REC) and a radio equipment (RE). [00035] Fig. 13B is a diagrammatic view showing several radio equipment entities (RE) being served by one radio equipment controller (REC). DETAILED DESCRIPTION [00036] In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular architectures, interfaces, techniques, etc. in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail. Moreover, individual function blocks are shown in some of the figures. Those skilled in the art will appreciate that the functions may be implemented using individual hardware circuits, using software functioning in conjunction with a suitably programmed digital microprocessor or general purpose computer, using an application specific integrated circuit (ASIC), and/or using one or more digital signal processors (DSPs). [00037] Fig. 1 shows an example embodiment of a distributed radio base station 20. The radio base station 20 comprises both a radio equipment controller (REC) 22 and a radio equipment (RE) 24. The radio equipment controller (REC) 22 and radio equipment (RE) 24 are connected by an internal interface 26. In the example implementation herein described, internal interface 26 is a CPRI link. Details of structure and operation of radio base station 20 and an internal interface 26 which takes the form of a CPRI link are understood from the Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1.1 (May 10,2004), which are incorporated by reference herein in their entirety. As in the specification, the description herein is based on the UMTS (Universal Mobile Telecommunication System) nomenclature. However, the radio base station 20 and the internal interface 26 may operate in accordance with other radio standards. [00038] The radio equipment controller (REC) 22 and radio equipment (RE) 24 may be physically separated (i. e. , the radio equipment (RE) 24 may be close to the antenna, whereas the radio equipment controller (REC) 22 may be located in a conveniently accessible site). Alternatively, both radio equipment controller (REC) 22 and radio equipment (RE) 24 may be co-located as in a conventional radio base station design. [00039] As illustrated in Fig. 1, radio equipment controller (REC) 22 provides an access towards an unillustrated Radio Network Controller via the Iub interface 30 (for the UMTS radio access network). Basically, the radio equipment controller (REC) 22 is concerned with the Iub transport and Iub protocols, the Node B (base station) control and management, as well as the digital baseband processing. For the downlink (i. e., from radio equipment controller (REC) 22 to radio equipment (RE) 24), the radio equipment controller (REC) 22 handles such operations as channel coding, interleaving, spreading, scrambling, adding of physical channels, controlling transmit power of each physical channel, frame and slot signal generation (including clock stabilization). For the uplink (i. e. , from radio equipment (RE) 24 to radio equipment controller (REC) 22), the radio equipment controller (REC) 22 handles such operations as channel de-coding, de-interleaving, de-spreading, de-scrambling, signal distribution to signal processing units, detection of feedback information for transmit power control, and signal to interference ratio measurement. [00040] The radio equipment (RE) 24 serves the air interface 32 to the user equipment (in an UMTS network the air interface is called the Uu interface). The user equipment unit, or mobile station, is not illustrated in Fig. 1. The radio equipment (RE) 24 provides the analogue and radio frequency functions such as filtering, modulation, frequency conversion and amplification. For the downlink, the radio equipment (RE) 24 performs operations such as digital to analogue conversion, up conversion, on/off control of each carrier, carrier multiplexing, power amplification and limiting, antenna supervision, and RF filtering. For the uplink, the radio equipment (RE) 24 performs operations such as analogue to digital conversion, down conversion, automatic gain control, carrier de-multiplexing, low noise amplification, and RF filtering. [00041] Thus, the radio equipment controller (REC) 22 comprises the radio functions of the digital baseband domain, whereas the radio equipment (RE) 24 contains the analogue radio frequency functions. The functional split between both parts is done in such a way that a generic interface based on In-Phase and Quadrature (IQ) data can be defined. [00042] The Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1.1 (May 10,2004) define protocols for the physical layer 34 (layer 1) and the data link layer 36 (layer 2). Layer 1 defines, e. g. , electrical characteristics, optical characteristics, time division multiplexing of the different data flows, and low level signaling. Layer 2 defines the media access control, flow control and data protection of the control and management information flow. [00043] The Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1.1 (May 10,2004) further describe four protocol data planes: control plane, management plane, user plane, and synchronization. These four protocol data planes are illustrated in Fig. 2. [00044] The control plane involves control data flow used for call processing. The management plane carries management information for the operation, administration and maintenance of the CPRI link and the radio equipment (RE) 24. The control and management data is exchanged between control and management entities with the radio equipment controller (REC) 22 and radio equipment (RE) 24, and is given to higher protocol layers. The control and management plane is mapped to a single information flow over the CPRI link. [00045] The user plane concerns data that has to be transferred from the radio base station to the mobile station and vice versa. The user plane data is transported in the form of in-phase and quadrature (IQ) modulation data (digital base band signals), represented by block 40 in Fig. 2. Several IQ data flows will be sent via one physical CPRI link 26. Each IQ data flow reflects the data of one antenna for one carrier, the so- called antenna-carrier (AxC). In general, without regard to specific protocol, one antenna-carrier is the amount of digital baseband (IQ) U-plane data necessary for either reception of transmission of one carrier at one independent antenna element. An AxC container contains the IQ samples of one AxC for one UMTS chip duration. Each flow in the user plane has reserved a certain bit field per frame, denoted as the AxC carrier. When the internal interface 26 is a CPRI interface, the AxC container contains samples of a chip an a UTRA-FDD carrier. [00046] Synchronization pertains to data flow which transfers synchronization and timing information between radio equipment controller (REC) 22 and radio equipment (RE) 24. Synchronization data is used for alignment of the SB/I OB coder as well as the detection of chip, hyperframe, radio frame boundaries, and associated frame numbering. [00047] Inband signaling, depicted by block 42 in Fig. 2, is signaling information that is related to the link and is directly transported by the physical layer. This information is required, e. g. for system startup, layer 1 link maintenance and the transfer of time critical information that has a direct time relationship to layer 1 user data. [00048] Block 44 of Fig. 2 shows vendor specific information, i. e. , an information flow which is reserved for vendor specific information. [00049] There are service access points (SAP) for all protocol data plane layer 2 services which are used as reference points for performance measurements. As illustrated in Fig. 1, for both radio equipment controller (REC) 22 and radio equipment (RE) 24 there are service access points SAPcM, SAPS, and SAPIQ for the control & management planes, the synchronization plane, and the user plane, respectively. [00050] Thus, in addition to the user plane data (IQ data), control and management as well as synchronization signals have to be exchanged between radio equipment controller (REC) 22 and radio equipment (RE) 24. All information streams are multiplexed onto a digital serial communication line using appropriate layer 1 and layer 2 protocols. The different information flows have access to the layer 2 via the appropriate service access points (SAPs). These information streams define the common public radio interface. [00051] The IQ data of different antenna carriers are multiplexed by a time division multiplexing scheme onto an electrical or optical transmission line forming the internal interface 26. The Control and Management data are either sent as inband signalling (for time critical signalling data) or by layer 3 protocols (not defined by Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1.1 (May 10,2004)) that reside on top of appropriate layer 2 protocols. Two different layer 2 protocols-High Data Level Link Control (HDLC) and Ethernet, depicted as 46 and 48, respectively, in Fig. 2-are supported by CPRI. These additional control and management data are time multiplexed with the IQ data. Finally, additional time slots are available for the transfer of any type of vendor specific information (block 42). [00052] Information flow over the internal interface 26 of radio base station 20 is carried in frames. In the example implementation which is compatible with Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1.1 (May 10,2004), the length of a basic frame is 1 Tchip = 1/3.84 MHz = 260.416667ns. As shown in Fig. 3A, for such compatible implementation a basic frame consists of 16 words with index W=0... 15. The word with the index W=0, 1/16 of the basic frame, is used for one control word. The length T of the word depends on the total data rate. The Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1.1 (May 10,2004) define three alternative data rates, each with differing word lengths: 614. 4Mbit/s (length of word T=8); 1228.8Mbit/s (length of word T=16); and 2457.6 Mbit/s (length of word T=32). Fig. 3A illustrates the frame structure for the 614. 4Mbit/s total data rate. [00053] The Common Public Radio Interface Specification Version 1.0 (September 26,2003) and Version 1.1 (May 10,2004) also define a hyperframe structure which is hierarchically embedded between the basic frame and the UMTS radio frame as shown in Fig. 3B. In Fig. 3B, Z in the hyperframe number; X is the basic frame number within a hyperframe; W is the word number within a basic frame; and Y is the byte number within a word. The control word is defined as word with rank W=0. Each bit within a word can be addressed with the index B, where B=0 is the LSB of the BYTE Y=0, B=8 is the LSB of BYTE Y=1, B=16 is the LSB of BYTE Y=2, and B=24 is the LSB of BYTE Y=3. [00054] Fig. 4 shows pertinent basic aspects of an example radio equipment (RE) 24 as comprising a framer 50 which is ultimately connected to internal interface 26, i. e., the CPRI interface. The framer 50 works in conjunction with a CPU or processor 52 of radio equipment (RE) 24. The processor 52 executes control software (SW) 54 which governs operation, e. g. , of framer 50 and terminates the application layer communication towards the radio equipment controller (REC) 22. In addition, radio equipment (RE) 24 comprises plural transmitters (such as transmitter 601 and transmitter 60a), and plural receivers (such as receiver 62, and receiver 62b). The transmitters 60 and receivers 62 can be either single-standard or multistandard. Each transmitter 60 and each receiver 62 is connected to a corresponding antenna 64 (which is distinct from and does not comprise radio equipment (RE) 24). The framer 50 is connected to forward payload information obtained from internal interface 26 to each of the transmitters 60 (as shown by lines terminated with solid arrowheads), and to receive information from each of the receivers 62 to be forwarded from radio equipment (RE) 24 over the internal interface 26 to radio equipment controller (REC) 22 (again as indicated by lines terminated with solid arrowheads, but having a reverse direction toward rather than away from framer 50). The processor 52 is connected to send control information or control signals to each of framer 50, the transmitters 60, and the receivers 62, as shown by lines terminated with non-solid arrowheads). [00055] Fig. 5 shows pertinent basic aspects of an example radio equipment controller (REC) 22 as comprising a framer 70 which is ultimately connected to internal interface 26, i. e. , the CPRI interface. The framer 70 works in conjunction with a CPU or processor 72 of radio equipment controller (REC) 22. The processor 72 executes control software (SW) 74 which governs operation, e. g. , of framer 70. In addition, radio equipment controller (REC) 22 comprises signal processing units collectively indicated as 76 in Fig. 5. The radio equipment controller (REC) 22 of Fig. 5 is shown as handling antenna carriers (AxC) AxC 1 and AxC c on the downlink (DL), and antenna carriers (AxC) AxC 1 and AxC d on the uplink (UL). [00056] As mentioned above, the Common Public Radio Interface (CPRI) is time multiplexed with one frame per WCDMA chip period, i. e. a frame rate of 3.84 Mframes/s, with each CPRI frame carrying one or more samples. But other protocols, i. e. , protocols other than WCDMA, have other frame or chip rates. As now explained, the present invention facilitates the Common Public Radio Interface (CPRI) accommodating transfer of samples for other protocols. [00057] Advantageously, the at least one and preferably both of the example radio equipment controller (REC) 22 and the example radio equipment (RE) 24 comprises framers (e. g. , framer 50 and framer 70, respectively) which can be controlled for transmitting samples of different protocols over the internal interface 26. As a general rule, the framer 50 and framer 70 both facilitate (1) time multiplexing of N number of frames of a first protocol over the internal interface; (2) inserting L number of samples of a second protocol into M number of the frames of the first protocol, and (3) inserting a padding sample into each frame of the first protocol which does not include a sample of the second protocol. The first protocol has a frame rate; the second protocol has a sample rate, and N is greater than L and M, with L, M, and N all being integers. [00058] Hereinafter are described various representative, non-limiting example modes of transmitting samples of different protocols over the internal interface 26, with the internal interface 26 is a Common Public Radio Interface (CPRI) and the frame rate of the first protocol is 3.84 Mframes/second. Thus, the CPRI has a frame rate which happens to be the same as the WCDMA chip rate. It should be understood that the principles of the present invention are not confined to the Common Public Radio Interface (CPRI), but are applicable to any internal interface 26 of a distributed base station. [00059] Fig. 7 illustrates a first example mode of transmitting samples of a different protocol over the internal interface 26. In the first example mode, the second protocol is CDMA 2000, for which the chip rate (i. e. , sample rate) is 3.6864 Mchips/second. In this first mode, N is 25 and L and M are 24. Thus, in this first mode twenty four CDMA 2000 samples 801 are inserted in twenty four CPRI frames, one sample 80, per chip (i. e. per frame), as indicated by the frames of Fig. 7 which have solid internal squares depicting samples 801. The last CPRI frame (chip) does not contain a CDMA 2000 sample 801, but instead is a padding frame which carries a padding sample. That is, in the last CPRI frame the corresponding AxC container contains padding. [00060] Thus, in the first mode, to transfer CDMA 2000 over the CPRI interface 26, extra samples are inserted at a rate of one extra sample per twenty four CDMA 2000 samples. The CDMA 2000 carrier can be transferred over the interface at the same time as WCDMA carriers are transferred, rendering internal interface 26 a multistandard interface. [00061] As in other modes herein described, the padding sample can comprise either of uninterpreted information or information related to the second protocol. For example, the padding sample can comprise a parity value for the L number of samples of the second protocol. [00062] Fig. 8 illustrates a second example mode of transmitting samples 802 of a different protocol over the internal interface 26. In the second example mode, the second protocol is CDMA One (e. g. , IS-95), for which the chip rate (i. e. , sample rate) is 1.2288 Mchips/second. In this second mode, N is 25 and L is 8. Thus, in this second mode, eight CDMA One samples 802 are inserted in eight CPRI frames, one sample 802 per chip (i. e. per frame) of the eight involved CPRI frames, as indicated by the frames of Fig. 8 which have solid internal squares depicting samples 802. As one implementation of this second mode and as shown in Fig. 8, M is 8, with the frames of the first protocol which host the second protocol samples being the first, fourth, seventh, tenth, thirteenth, sixteenth, nineteenth, and twenty second first protocol frames. In the Fig. 8 illustration, the AxC containers for seventeen of the first protocol frames contain padding. [00063] The technique of the second mode (CDMA One (e. g. , IS-95) ) can also be |
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2601-delnp-2006-Claims-(23-01-2013).pdf
2601-delnp-2006-Correspondence Others-(23-01-2013).pdf
2601-delnp-2006-Correspondence Others-(29-11-2013).pdf
2601-delnp-2006-correspondence-other.pdf
2601-delnp-2006-Correspondence-Others-(05-11-2012).pdf
2601-delnp-2006-correspondence-others-1.pdf
2601-delnp-2006-description-(complete).pdf
2601-delnp-2006-Form-3-(29-11-2013).pdf
2601-delnp-2006-GPA-(23-01-2013).pdf
2601-delnp-2006-Petition-137-(23-01-2013).pdf
Patent Number | 260901 | ||||||||||||
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Indian Patent Application Number | 2601/DELNP/2006 | ||||||||||||
PG Journal Number | 22/2014 | ||||||||||||
Publication Date | 30-May-2014 | ||||||||||||
Grant Date | 28-May-2014 | ||||||||||||
Date of Filing | 09-May-2006 | ||||||||||||
Name of Patentee | TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) | ||||||||||||
Applicant Address | S-164 83 STOCKHOLM(SE) | ||||||||||||
Inventors:
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PCT International Classification Number | H04Q 7/30 | ||||||||||||
PCT International Application Number | PCT/SE2004/001675 | ||||||||||||
PCT International Filing date | 2004-11-16 | ||||||||||||
PCT Conventions:
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