WO2010005395A1 - Procédé de communication sans fil - Google Patents

Procédé de communication sans fil Download PDF

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Publication number
WO2010005395A1
WO2010005395A1 PCT/SG2009/000191 SG2009000191W WO2010005395A1 WO 2010005395 A1 WO2010005395 A1 WO 2010005395A1 SG 2009000191 W SG2009000191 W SG 2009000191W WO 2010005395 A1 WO2010005395 A1 WO 2010005395A1
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WO
WIPO (PCT)
Prior art keywords
lte
sch
frequency
camping
ues
Prior art date
Application number
PCT/SG2009/000191
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English (en)
Inventor
Sai Ho Wong
Francois Po Shin Chin
Zhongding Lei
Quee Seng Tony Quek
Yong Huat Chew
Original Assignee
Agency For Science, Technology And Research (A*Star)
Priority date (The priority date 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 date listed.)
Filing date
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Publication of WO2010005395A1 publication Critical patent/WO2010005395A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0069—Cell search, i.e. determining cell identity [cell-ID]
    • H04J11/0086—Search parameters, e.g. search strategy, accumulation length, range of search, thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities

Definitions

  • This invention relates to a method of wireless communication, a wireless communication network and a wireless communication device, and relates particularly though not solely to downlink synchronisation in a wireless mobile communication network.
  • E-UTRA Evolved UMTS (Universal Mobile Telecommunications
  • the BWUE is defined as 20MHz, in order to maintain the single carrier property in the uplink.
  • the LTE downlink synchronisation is achieved with the help of the SCH.
  • the SCH consists of 73 subcarriers, including guard subcarriers and the DC subcarrier. In order to realise the bandwidth agnostic approach, the SCH is located at the centre of the system bandwidth.
  • the DC subcarrier also resides on the 100kHz raster frequency so that an initial cell search is possible.
  • the SCH is transmitted every 5ms, consisting of the primary and secondary synchronisation channels, each occupying 1 OFDM symbol. This is to allow inter-RAT measurement while maintaining low overheads and time-symmetric SCH within a 10ms radio frame.
  • the LTE UE can perform handover cell search without switching frequency, otherwise known as intra-frequency measurement. This is advantageous for battery saving and quick handover as a measurement gap for inter-frequency measurement is not necessary. Hence the same cell search procedure for initial and handover cell search can be reused, with no additional overheads.
  • the data rate requirement for LTE-Advanced for nomadic downlink access is in excess of 1 Gbps.
  • the BW S Y S is expected to be much greater than 20MHz 1 for example around 100MHz.
  • backward compatibility of legacy LTE devices operating in the new LTE-Advanced systems is to be ensured, as the adoption of LTE- Advanced UEs would be gradual.
  • an LTE-Advanced system would be expected to operate with a majority of LTE UEs working seamlessly with a few LTE-Advanced UEs.
  • the present invention relates to providing ASCH and camping positions for UE at positions predetermined according to both BW S ⁇ s and BWUE, where BW S Y S > 2 x BWU E -
  • BW S Y S > 2 x BWU E - This may have the advantage that the BWSY S is used efficiently eg: any unused BW S ⁇ s is less than BWUE, and/or the overhead required is not excessive.
  • This may also have the advantage(s) that:
  • one or more of the ASCH locations can be switched off, depending on deployment ratio between LTE and LTE-Advanced UEs;
  • Figure 1 is a block diagram of a wireless mobile communication network according to a first example embodiment
  • Figure 2 is a table of a subcarrier numbering system
  • Figure 3 is a table of properties for a plurality of nominal system bandwidths applicable to a LTE system
  • Figure 4 is a graph centralised SCH channel occupation in the frequency domain with a plurality of nominal system bandwidths applicable to the LTE system in Figure 3;
  • Figure 5 is a graph of Time-Frequency allocation of the PSCH, the SSCH and the PBCH applicable to a LTE system with normal CP length;
  • Figure 6 is a graph of Time-Frequency allocation of PSCH, SSCH and the PBCH applicable to a LTE system with extended CP length;
  • Figure 7 is a graph of the SCH structure in:
  • Figure 9 is graph of the possible camping positions for LTE devices in LTE-Advanced
  • Figure 10 is a graph of the possible camping positions for LTE devices in LTE- Advanced BWSY S 1800 (30MHz);
  • Figure 11 is a graph of the possible camping positions for LTE devices in LTE- Advanced BW SYS 2400 (40MHz):
  • Figure 14 is a graph of the possible camping positions for legacy LTE devices in an
  • a first example embodiment of a wireless mobile communication network 100 is shown in Figure 1.
  • a plurality of NBs 110 are geographically distributed across the network 100.
  • Each NB 110 may be an eNB, a BS, an access point, a femto cell or a relay.
  • the overall coverage of each NB 110 may be split into multiple cells 112, where the term "cell" refers to its smallest coverage area of a NB and/or sectors of the same NB.
  • UEs 120 are dispersed throughout the network, and can be stationary or have various degrees of mobility up to 350km/h for a system compliant to the LTE standard.
  • a solid line with double arrows 114 denotes active communication between the NB 110 and the UE 120.
  • a broken line with a single arrow 116 indicates that a UE is also receiving a downlink signal from a nearby NB 110.
  • the NB 110 may periodically transmit synchronisation signals on the SCH to allow the UE 120 to obtain information such as timing, frequency offset, cell ID etc.
  • Initial cell search is used when a UE 120 is first powered on, or when it has lost synchronisation due to factors such as its mobility.
  • the SCH for initial cell search has to be centred around the frequency raster of 100kHz, as the UE 120 has no a-priori information about its location in frequency.
  • the frequency location of PBCH is also centralised around the DC in the whole system bandwidth.
  • the signal from the serving NB 110 may be come weak and control has to be handed to another NB nearby, and the decision is based on measurements for handover cell search, which may not need to lie on the frequency raster of 100KHz.
  • the same procedure is used for both initial and handover cell search, which is made possible by a BWU E of
  • FIG. 2 illustrates the subcarrier numbering system used in the first example embodiment.
  • Each subcarrier 201 has an inter-carrier frequency of 15KHz.
  • the BW S ⁇ s 202 is an even number of subcarriers, excluding the DC subcarrier.
  • 72 ⁇ BW SYS ⁇ 1320 and for LTE-Advanced, BW SYS of up to 6000 may support a downlink data peak rate of 1Gbps.
  • IFFT-based transmission concepts such as OFDMA which is employed in an LTE downlink, a DC offset may interfere with the central sub-carrier after demodulation with a zero-IF receiver.
  • the central sub-carrier of the transmitted signal is usually designed so as to not carry any information, i.e., it is a null DC sub-carrier.
  • the numbering of subcarriers starts from the DC location 203, denoted as subcarrier 0, so that the subcarriers in the lower half of the BW S ⁇ s 204 are numbered from 1 to BWs ⁇ s/2, and the subcarriers in the upper half of the BW SYS 205 are numbered from -1 to -BWs ⁇ s/2.
  • Figure 3 shows properties for a LTE system.
  • the six nominal bandwidths are 1.4, 3.0, 5.0, 10.0, 15.0, 20.0 MHz occupying 72, 180, 300, 600, 900 and 1200 subcarriers respectively.
  • the DC location for each nominal bandwidth is at subcarrier location 0.
  • a LTE system is typically designed according to a bandwidth agnostic approach, and any system bandwidths between 72 ⁇ BW S ⁇ s ⁇ 1320 are supported.
  • FIG 4 shows a conceptual representation of the centralised SCH channel occupation in frequency domain for the LTE system.
  • Blocks 401-406 represent the 6 nominal bandwidths shown in Figure 3.
  • Each RB 407 consists of 12 subcarriers.
  • the SCH 408 occupies a bandwidth equivalent to 72 subcarriers, centred around the DC subcarrier 409. Therefore SCH 408 takes up the centre 73 subcarriers regardless of the system bandwidth.
  • the DC subcarrier 409 resides on the raster frequency of 100kHz so that the UE can perform initial search for the SCH blindly upon power-on.
  • a SCH consists of the PSCH and SSCH.
  • FIG. 5 shows the Time-Frequency allocation of PSCH 501 , SSCH 502 and the PBCH 503 applicable to LTE with normal CP length.
  • Each subframe 504 contains 2 slots 505 of duration 0.5ms, and each slot 505 contains 7 OFDM symbols.
  • PSCH 501 and SSCH 502 occupy the last and second last OFDM symbol of the first slot 505 respectively.
  • PBCH 503 occupies the first 4 OFDM symbols in the second slot.
  • the structure of units 501-503 are repeated in subframes #0 and #5.
  • units 501-503 occupy the centre 73 subcarriers 506.
  • the PDCCH 507 may occupy the first to the third OFDM symbols of each subframe.
  • An SCH consists of the PSCH 501 and the SSCH 502.
  • Figure 6 shows the Time-Frequency allocation of PSCH 601 , SSCH 602 and PBCH 603 applicable to the LTE system with extended CP length.
  • Each subframe 604 contains 2 slots 605 of duration 0.5ms, and each slot 605 contains 6 OFDM symbols.
  • PSCH 601 and SSCH 602 occupy the last and second last OFDM symbol of the first slot 605 respectively.
  • PBCH 603 occupies the first 4 OFDM symbols in the second slot.
  • each radio frame of 10ms the structure of units 601-603 are repeated in subframes #0 and #5. In the frequency domain, units 601-603 occupy the centre 73 subcarriers 606.
  • the PDCCH 607 occupies the first to the third OFDM symbols of each subframe.
  • the first example embodiment employs a method of communication 1900 as shown in Figure 19.
  • a SCH is transmitted in at the centre of BW S ⁇ s.
  • auxiliary DCs are determined and inserted according to Equations (1) & (2), and ASCHs are placed with PBCHs centred around the auxiliary DCs.
  • a plurality of camping positions are provided centred about the SCH or one of the ASCHs so that the total amount of the BW SYS unused by the plurality of camping positions is less than the BW UE .
  • the UEs first perform initial cell search for the SCH & PBCH centred around the actual DC subcarrier at frequency location 0. If the bandwidth receiving capability of the UEs is smaller than the bandwidth of the system, different camping positions within that system bandwidth are provided. For LTE UEs in a LTE-Advanced network, the possible camping positions are centred around the DC and the auxiliary DCs.
  • Figure 7(a) shows an LTE-Advanced SCH structure where BW SYS > BW UE and BW S ⁇ s 700 has 6000 subcarriers (100MHz).
  • the LTE BW U E has 1200 subcarriers (20MHz).
  • Initial cell search is still performed at the SCH 711, whose DC subcarrier resides on the raster frequency of 100kHz.
  • the 5 possible camping positions 701-705 for the legacy LTE UEs after initial cell search are centred around the SCH 711 and the 4 ASCHs 712-715.
  • LTE-Advanced BW SY s 720 has 4800 subcarriers (80MHz) and the LTE
  • BWUE has 1200 subcarriers (20MHz) as disclosed in 3GPP contribution REV-080026.
  • Initial cell search is still performed at the centralised SCH/PBCH 731 , whose DC subcarrier also resides on the raster frequency of 100KHz.
  • the three possible camping positions 721-723 for the LTE UEs after the initial cell search are centred around three SCHs/PBCHs positions 731-733.
  • a centralised SCH/PBCH is placed around the DC subcarrier, which in turn resides on the raster frequency to enable a bandwidth agnostic initial cell search.
  • the location of the DC subcarrier is denoted by subcarrier number 0. 5
  • frequency locations A(N) of auxiliary DC subcarriers over the lower half of the system bandwidth are computed according to Equation (1):
  • a ⁇ N BW SYS ⁇ BW m
  • Equation (2) 5
  • FIG. 8 shows the ASCH locations for a plurality of BW SYS applicable to LTE- Advanced between 20-100MHz. The values of K and f(N) were determined according to Equations (1) & (2).
  • the centralised SCH/PBCH is placed at 903 around the DC at 902. Since BW S Y S ⁇ 2XBWUE > there is only 1 camping position for LTE UEs.
  • the resulting overhead due to SCH/PBCH is 0.5% and 0.6% for normal and extended CP respectively.
  • the SCH/PBCH 1002 allows only one camping position 1003 for LTE UEs, since BW S ⁇ s ⁇ 2xBW UE -
  • the resulting overhead due to SCH/PBCH is 0.3% and 0.4% for normal and extended CP respectively.
  • a centralised SCH/PBCH centred around DC 1102 is placed so that there is one camping position 1103 for LTE UEs.
  • the resulting overhead due to SCH/PBCH is 0.3% for both normal and extended CP.
  • ASCH/PBCH frequency locations are determined according to Equations (1) & (2).
  • a SCH/PBCH 1102 facilitates initial cell search and allows for one camping position 1103, which is identical to that shown in Figure 11 (a).
  • ASCHs are placed at frequency locations centred around auxiliary DCs 1111 & 1112, allowing for LTE UEs to camp at frequency locations 1113 & 1114 respectively.
  • the PBCHs are placed also at the same subcarriers as the ASCHs but on different OFDM symbols as shown in Figure 5 & 6.
  • the bandedge subcarriers 1104 and 1105 are now utilised to bring about a 300% increase in the possible camping positions for LTE UEs multiplexing when compared to Figure 11 (a).
  • a SCH/PBCH 1202 allows one camping position 1203 for legacy LTE UEs.
  • the resulting overhead due to SCH/PBCH is 0.2% for both normal and extended CP.
  • ASCH/PBCH frequency locations are determined according to Equations (1) & (2).
  • a SCH/PBCH 1202 facilitates initial cell search and allow for one camping position 1203, which is identical to that shown in Figure 12(a).
  • ASCHs are placed at frequency locations centred around auxiliary DCs 1211 & 1212, allowing for LTE UEs to camp at frequency locations 1213 & 1214 respectively.
  • the PBCHs are placed also at the same subcarriers as the ASCHs but on different OFDM symbols as shown in Figure 5 & 6.
  • the bandedge subcarriers 1204 &1205 are now utilised to bring about a 300% increase in the possible camping positions for legacy LTE UEs multiplexing when compared to Figure 12(a).
  • the resulting overhead due to ASCH/PBCH is 0.4% and 0.5% for normal and extended CP respectively.
  • a SCH/PBCH 1302 allows one camping position 1303 for LTE UEs.
  • Two additional ASCHs can be placed so that their DC positions 1304 & 1305 are BWUE away from 1302, creating two camping positions 1306 & 1307 respectively for LTE UEs.
  • the resulting overhead due to ASCH/PBCH is 0.3% and 0.4% for normal and extended CP respectively.
  • the ASCH/PBCH frequency locations are determined according to Equations (1 ) & (2).
  • a SCH/PBCH 1302 facilitates initial cell search and allow for one camping position 1303, which is identical to that shown in Figure 13(a).
  • ASCHs are placed at frequency locations centred around auxiliary DC subcarriers 1311 & 1312, allowing for LTE UEs to camp at frequency locations 1313 & 1314 respectively.
  • the PBCHs are placed also at the same subcarriers as the ASCHs but on different OFDM symbols as shown in Figure 5 & 6. Although the generation steps are different, the resulting ASCH/PBCH positions in Figure 13(a) & (b) are identical.
  • a SCH/PBCH 1402 allows for one camping position 1403 for LTE UEs.
  • Two additional ASCHs can be placed so that their DC subcarrier positions 1404 & 1405 are BW U E away from the SCH 1402, creating two camping positions 1406 & 1407 respectively for LTE L)Es.
  • the resulting overhead due to ASCH/PBCH is 0.3% for both normal and extended CP.
  • ASCH/PBCH frequency locations are determined according to Equations (1) & (2).
  • a SCH/PBCH 1402 facilitates initial cell search and allow for one camping position 1403, which is identical to that shown in Figure 14(a).
  • ASCHs are placed at frequency locations centred around auxiliary DC sucarriers 1411 & 1412, allowing for legacy LTE UEs camping positions 1413 & 1414.
  • the PBCHs are placed also at the same subcarriers as the ASCHs but on different OFDM symbols as shown in Figure 5 & 6. Although there are also unused two blocks of subcarriers 1415 & 1416 their frequency locations are different from the unused two blocks of subcarriers 1408 & 1409 in Figure 14(a).
  • Figure 15(a) is similar to Figure 7(b) where, a SCH/PBCH 1502 allowing for one camping position 1503 for LTE UEs.
  • Two additional ASCHs can be placed so that their DC positions 1504 & 1505 are BW U E away from 1502, creating two camping positions 1506 & 1507 for LTE UEs.
  • the resulting overhead due to ASCH/PBCH is 0.3% for both normal and extended CP.
  • Figure 15(b) shows the DC subcarrier 1501 , and the additional DC subcarriers 1511- 1516 placed BWUE/2 away from each other in frequency.
  • the ASCHs are placed, centred around each DC subcarrier to create camping positions 1521-1526.
  • This embodiment has the highest multiplexing flexibility, so that there is a 230% increase in the number of possible camping positions for the multiplexing of LTE UEs when compared to Figure 15(a) or 7(b), or 3GPP contribution REV-080026. However, there is also a corresponding 200% increase in overhead.
  • the ASCH/PBCH frequency locations are determined according to Equations (1) & (2).
  • a SCH/PBCH 1502 facilitates initial cell search and allows for one camping position 1503, which is identical to that shown in Figure 15(a).
  • ASCHs are placed at frequency locations centred around auxiliary DCs 1531 , 1532, 1533 & 1534, allowing for legacy LTE UEs to camp at frequency locations 1535, 1536, 1537 & 1538.
  • the PBCHs are placed also at the same subcarriers as the ASCHs but on different OFDM symbols as shown in Figure 5 & 6.
  • Figure 15(a) are now utilised to multiplex more LTE UEs, without excessive overheads as shown in Figure 15(b).
  • a centralised SCH/PBCH centred around DC 1602 is placed so that there is one camping position 1603 for LTE UEs.
  • Two ASCHs can be placed so that their DC positions 1604 & 1605 are BW UE away from 1602, creating two camping positions 1606 & 1607 respectively for LTE UEs.
  • the resulting overhead due to ASCH/PBCH is 0.2% and 0.3% for normal and extended CP respectively.
  • ASCH/PBCH frequency locations are determined according to Equations (1) & (2).
  • a SCH/PBCH 1602 facilitates initial cell search and allows for one camping position 1603, which is identical to that shown in Figure 15(a).
  • ASCHs are placed at frequency locations centred around auxiliary DCs 1611-1614, allowing for LTE UEs camping position 1615-1618.
  • the PBCHs are placed also at the same subcarriers as the ASCHs but on different OFDM symbols as shown in Figure 5 & 6.
  • the bandedge subcarriers otherwise unused for camping in 1608 &1609 are now utilised to bring about a 167% increase in the possible camping positions for LTE UEs multiplexing.
  • the resulting overhead due to ASCH/PBCH is 0.3% and 0.4% for normal and extended CP respectively.
  • a SCH/PBCH 1702 allows for one camping position 1703 for LTE UEs.
  • Two ASCHs can be placed so that their DC positions 1704 & 1705 are BWU E away from 1702, creating two camping positions 1714 & 1715 for LTE UEs.
  • Another two ASCHs can be placed at 1706 & 1707, i.e. BW UE away from 1704 & 1705 respectively, creating another two camping positions 1716 & 1717.
  • the resulting overhead due to SCH/PBCH is 0.3% and 0.4% for normal and extended CP respectively.
  • the ASCH/PBCH frequency locations are determined according to Equations (1) & (2).
  • a SCH/PBCH 1702 facilitates initial cell search and allows for one camping position 1703, which is identical to that shown in Figure 17(a).
  • ASCHs are placed at frequency locations centred around auxiliary DC subcarriers 1721-1724, allowing for LTE UEs to camp at frequency locations 1725-1728 respectively.
  • the PBCHs are placed also at the same subcarriers as the ASCHs but on different OFDM symbols as shown in Figure 5 & 6. Note that though the generation steps are different, the resulting SCH/PBCH positions in Figure 17(a) & (b) are identical.
  • the resulting overhead due to SCH/PBCH is 0.3% and 0.4% for normal and extended CP respectively.
  • the ASCH frequency positions across different bandwidths may not always be identical.
  • measurement gaps for inter-frequency measurement may be necessary. This may cause delays in handover and power drain in the UE.
  • Figure 18 shows the different scenarios where inter- frequency measurements are required, in which scenarios D & E might be applicable to a further embodiment. However, it is unlikely to happen in practice as cells belonging to the same mobile operator typically have the same system bandwidth. This is also assumed in various 3GPP contributions, such as R1 -082054.
  • a further embodiment may not require inter-frequency measurements as the SCH/PBCH & ASCH locations are identical for neighbour cells of the same system bandwidth.
  • LTE-Advanced UEs will not require SCH/PBCH to be centralised for handover cell search, allowing flexibility in the camping positions.
  • the presence of the ASCH also helps in the handover cell search for LTE-Advanced UE with capability greater than 1200 subcarriers, as the ASCH positions are defined by formulae according to the system bandwidth and can be easily calculated relative to the camping positions.
  • Another advantage of the first example embodiment may be its flexibility in deployment. If desired by the operator, some ASCHs may be turned off if not many legacy LTE devices need to be supported after a sufficiently long implementation of the LTE- Advanced system. In Figure 15(c), camping positions 1537 & 1538 may be switched off if few LTE UE need to be supported. This switching off operation is blind to the LTE UEs 1 as the higher layers would not instruct the LTE UEs to camp at those positions without SCH/ASCH. In contrast, Figure 15(a) does not allow such flexibility. On the other hand, LTE-Advanced UEs need to be informed of this switching on/off of certain ASCH locations through higher-layer signalling, as it is possible for these devices to span over multiple SCH/ASCHs.
  • Another method that does not need extra control signalling is for the LTE-Advanced UEs to perform a one-time blind-detection of the ASCH positions that may be switched off.
  • the LTE-Advanced UEs may simply consider the possible positions that ASCH could be absent, to be always off.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé de communication sans fil entre un équipement utilisateur (UE) ayant une capacité de bande passante BWUE et un nœud B (NB) ayant une bande passante de système (BWSYS). Ledit procédé consiste à : fournir un canal de synchronisation (SCH) centré autour de (BWSYS) ; fournir des canaux de synchronisation auxiliaires (ASCH) à une pluralité d'emplacements déterminés selon (BWSYS) et BWUE ; fournir une pluralité de positions de campement, chaque position de campement étant centrée autour de SCH ou de l'un des ASCH, la quantité totale de BWSYS non utilisée par la pluralité de positions de campement étant inférieure à BWUE. L'invention porte également sur un réseau de communication sans fil et sur un dispositif de communication sans fil.
PCT/SG2009/000191 2008-07-07 2009-05-29 Procédé de communication sans fil WO2010005395A1 (fr)

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US61/078,646 2008-07-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011000327B4 (de) * 2010-02-01 2018-05-17 Intel Deutschland Gmbh Funkbasisstationen, Funkkommunikationsvorrichtung, Verfahren zum Steuern einer Funkbasisstation und Verfahren zum Steuern einer Funkkommunikationsvorrichtung

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1819069A2 (fr) * 2006-02-11 2007-08-15 Samsung Electronics Co., Ltd. Procédé et appareil de transmission/réception de canaux de diffusion dans des systèmes de communication cellulaires supportant une bande passante extensible
US20070190967A1 (en) * 2006-01-19 2007-08-16 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving common channel in a cellular wireless communication system supporting scalable bandwidth
US20080080476A1 (en) * 2006-10-02 2008-04-03 Samsung Electronics Co., Ltd Method and apparatus for transmitting/receiving downlink synchronization channels in a cellular communication system supporting scalable bandwidth

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070190967A1 (en) * 2006-01-19 2007-08-16 Samsung Electronics Co., Ltd. Method and apparatus for transmitting and receiving common channel in a cellular wireless communication system supporting scalable bandwidth
EP1819069A2 (fr) * 2006-02-11 2007-08-15 Samsung Electronics Co., Ltd. Procédé et appareil de transmission/réception de canaux de diffusion dans des systèmes de communication cellulaires supportant une bande passante extensible
US20080080476A1 (en) * 2006-10-02 2008-04-03 Samsung Electronics Co., Ltd Method and apparatus for transmitting/receiving downlink synchronization channels in a cellular communication system supporting scalable bandwidth

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011000327B4 (de) * 2010-02-01 2018-05-17 Intel Deutschland Gmbh Funkbasisstationen, Funkkommunikationsvorrichtung, Verfahren zum Steuern einer Funkbasisstation und Verfahren zum Steuern einer Funkkommunikationsvorrichtung

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