WO2014059591A1 - Accès initial pour type de porteuse autonome - Google Patents

Accès initial pour type de porteuse autonome Download PDF

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Publication number
WO2014059591A1
WO2014059591A1 PCT/CN2012/083009 CN2012083009W WO2014059591A1 WO 2014059591 A1 WO2014059591 A1 WO 2014059591A1 CN 2012083009 W CN2012083009 W CN 2012083009W WO 2014059591 A1 WO2014059591 A1 WO 2014059591A1
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WO
WIPO (PCT)
Prior art keywords
cell
frequency
information block
synchronization signals
determined
Prior art date
Application number
PCT/CN2012/083009
Other languages
English (en)
Inventor
Na WEI
Chunyan Gao
Wei Bai
Pengfei Sun
Erlin Zeng
Haiming Wang
Wei Hong
Lili Zhang
Original Assignee
Broadcom Corporation
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
Publication date
Application filed by Broadcom Corporation filed Critical Broadcom Corporation
Priority to PCT/CN2012/083009 priority Critical patent/WO2014059591A1/fr
Publication of WO2014059591A1 publication Critical patent/WO2014059591A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0012—Hopping in multicarrier systems
    • 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

Definitions

  • the present invention relates to providing initial access for a standalone carrier type of a cell of a mobile communication system.
  • eNB enhanced NodeB (name for NodeB in LTE)
  • 3GPP Release 11 brings changes to a number of features by means of a non- standalone new carrier type (Rll NCT).
  • the features comprise an enhanced control channel (ePDCCH) replacing PDCCH, and the control channels are no longer fixed to certain time-frequency resources, but can be more flexibly allocated, and CRS can be significantly reduced, if not completely removed.
  • ePDCCH enhanced control channel
  • the system operation on the NCT is mostly based on CSI-RS and DM-RS instead of CRS.
  • FIG. 1 illustrates a stand-alone local access of a UE to a local access node AN which may or may not reside in an area of a base station BS and does not connect to a macro BS and thus can work standalone (see also references [1] and [2]).
  • initial access techniques used for non-standaione carriers cannot simply be reused to provide initial access for standalone carriers.
  • the present invention aims at overcoming the above drawbacks.
  • the invention aims at providing methods and apparatuses for enabling an initial access for a standalone carrier type of a cell of a mobile communication system.
  • the invention may also be implemented by a computer program product. According to an embodiment of the invention, in order to provide initial access for an SA-NCT, methods are proposed for MIB indication in the SA-NCT.
  • the proposed methods offer higher spectrum efficiency and better inter-cell interference reduction/mitigation. Besides, CRS can be removed in the SA-NCT.
  • Fig. 1 shows a diagram illustrating an example standalone new carrier type scenario.
  • FIGs. 2A and 2B show flowcharts illustrating processes of providing initial access for a standalone carrier type of a cell of a mobile communication system according to embodiments of the invention.
  • Fig. 3 shows a diagram for explaining determination of MIB frequency and time resources according to a first implementation example of the invention.
  • Fig. 4 shows a diagram for explaining determination of MIB frequency and time resources according to a second implementation example of the invention.
  • Fig. 5 shows a schematic block diagram illustrating a configuration of control units in which examples of embodiments of the invention are implementable.
  • SA-NCT non-backward compatible new carrier type
  • the Pcell informs the UE about the location of PSS/SSS explicitly by RRC signaling relating to the time and frequency location.
  • the UE can work out the location of PSS/SSS from the detected Cell ID based on an equation.
  • PSS/SSS is considered.
  • MIB resource indication in SA-NCT for example.
  • this application proposes that MIB frequency and time resources are determined by each cell independently.
  • the same frequency resources as used for synchronization signals, used to synchronize a user equipment (UE) with a cell of a mobile communication system in time and frequency, e.g. PSS/SSS, and a fixed time offset to the synchronization signals are used for an information block, which includes parameters necessary for the user equipment to access the cell, e.g. an MIB.
  • Fig. 2A shows a flowchart illustrating a process 1 for providing initial access for a standalone carrier type, e.g. an SA-NCT, of a cell of a mobile communication system.
  • the process 1 may be carried out by an entity of the mobile
  • step S10 frequency and time resources of the information block (e.g. MIB) are determined with respect to the
  • the information block is included in resource blocks to be broadcasted in the cell, according to the determined frequency and time resources.
  • the frequency resources of the information block are determined to be the same as frequency resources of the synchronization signals, and the time resources of the information block are determined to have a fixed offset relative to time resources of the synchronization signals.
  • the frequency and time resources of the information block are determined to have offsets relative to frequency and time resources of the synchronization signals.
  • the offsets may be determined to be linked to an identification of the cell or a physical cell identification. Alternatively, the offsets may be determined to be obtainable by the user equipment via blind detections among several possible offsets.
  • a hopping position of the information block may be indicated in a sequence based on the synchronization signals or a new sequence.
  • the frequency and time resources of the information block are determined by using a downlink control channel (e.g. an ePDCCH) in a common search space linked to the synchronization signals.
  • a downlink control channel e.g. an ePDCCH
  • the frequency and time resources of the information block may be determined aperiodically directly after detection of the synchronization signals, or the resource blocks in which the information block is included may have a format of downlink control information of the downlink control channel.
  • an ePDCCH in the common search space is used to schedule the resources of MIB aperiodically directly after PSS/SSS detection, or to carry MIB directly by a predefined ePDCCH DCI format.
  • the common search space location may be linked implicitly to PSS/SSS.
  • this application further proposes determining the center frequency in case the information block is not in the center frequency. Once information block resources are determined, the user equipment will determine an offset between the information block frequency resources and the center frequency via implicit linkage to cell ID or PCI, or via an explicit configuration in the information block.
  • Fig. 2B shows a flowchart illustrating a process 2 of providing initial access for a standalone carrier type of a cell of a mobile communication system.
  • the process 2 may be carried out by an entity of the user equipment.
  • the user equipment synchronizes with the cell in time and frequency based on
  • step S21 the user equipment searches, in resource blocks broadcasted in the cell which are within a predetermined detection range from frequency and/or time resources of the synchronization signals, e.g. 6RB around the location of
  • step S22 the user equipment accesses the cell with the parameters included in the information block detected as a result of the searching.
  • the user equipment may determine an offset between frequency resources of the information block and a center frequency for fast Fourier transformation from an identification of the cell or a physical cell identification, and/or configuration information contained in the information block.
  • the user equipment may search for the information block based on information in the downlink control channel in the common search space linked to the synchronization signals.
  • the information in the downlink control channel may be acquired directly after detection of the synchronization signals, or the user equipment may search for the information block in resource blocks having a format of downlink control information of the downlink control channel as mentioned above.
  • Fig. 3 illustrates a first implementation example of the invention. As shown in Fig. 3, neighbor cells Celll, Cell2, Cell3 have frequency offsets for transmitting
  • PSS/SSS and MIB PSS/SSS and MIB.
  • the ceil IDs of Celll, Cell2, Cell3 can be used to implicitly find the offset from the center frequency, or the offset can be indicated in MIB. With this implementation example, better inter-cell interference handling for initial access can be enabled.
  • the UE synchronizes first with a non-center frequency, called virtual center frequency Fc_v. That is, frequency location of PSS/SSS/MIB is on Fc_v, which is different from the actual center frequency Fc.
  • the channel raster is 100 kHz for all bands, which means that the carrier centre frequency must be an integer multiple of 100 kHz. Further, the difference "Fc_v - Fc" should be larger than 6RB, and should be a multiple of 100kHz. For example, Fc_v may be Fc-1.8MHz or Fc+ 1.8MHz.
  • the UE detects SSS/PSS in Fc_v, assuming Fc_v as center frequency for FFT, and detects 6RB around Fc_ to detect MIB.
  • the UE is informed on the actual center frequency Fc by implicit linkage to cell ID or explicit configuration in MIB message as described above. If Fc_v is not Fc, the UE retunes the carrier frequency and performs a new FFT procedure e.g. according to a DL bandwidth as indicated in MIB. Alternatively, the UE may implicitly know the offset between Fc and Fc_v from PCI.
  • a PRB number of higher part and lower part of the MIB may be used.
  • a predefined granularity with a few bits may be used to reduce the signaling overhead, e.g., 2 or 4 fixed possible locations and restricted to 1 or 2 bits.
  • the time/frequency offset can be directly reused by the cell for MIB.
  • the UE needs one retuning gap to tune to the actual center frequency.
  • the UE In a second step, if the offset is linked to cell ID (or PCI), the UE knows the MIB frequency offset after PSS/SSS detection, and detects the MIB at a frequency "Fc+offset". Otherwise, the UE may search for the MIB in 6RB at a few possible resources, for example at Fc (Fc-3RB to FC+3RB), Fc+6RB (Fc+3RB, Fc+9RB), Fc-6RB (Fc-3RB, Fc-9RB), as an example of three possible predefined locations, and blind detect the MIB.
  • Fc Fc-3RB to FC+3RB
  • Fc+6RB Fc+3RB, Fc+9RB
  • Fc-6RB Fc-3RB, Fc-9RB
  • the PSS/SSS frequency position hops randomly. This may be useful for a femto type of deployment (no cell planning). This is up to eNB implementation and is covered by cases 1 and 2 with explicit offset indication in MIB.
  • MIB always hops together with PSS/SSS. This is covered by case 1 with explicit offset indication in MIB. Alternatively, MIB further hops on its own.
  • PSS/SSS sequence (which is used to indicate first 5ms, second 5ms in R8) can be used to indicate the MIB hopping position. Two predefined hopping positions are possible in this case.
  • a sequence other than the PSS/SSS sequence may be transmitted with a predefined relative position to PSS/SSS, which is used to indicate the hopping position for MIB if more hopping positions are needed. The number of hopping positions depends on the sequence number selected.
  • Fig. 4 illustrates a second implementation example of the invention.
  • the UE In a first step, the UE detects PSS/SSS. In a second step, the UE switches directly to PCI linked eCSS region for ePDCCH detection. In Fig. 4, since the UE tries to access cell 1, the UE switches to "ePDCCH eCSS Celll". Cells with different PCI have orthogonal eCSS resources.
  • the UE detects an ePDCCH using a dedicated reserved MIB-RNTI.
  • the UE may detect the ePDCCH using an SI-RNTI.
  • the UE performs measurements only in certain SFs when no other SIBs are transmitted, or leaves a possible collision of normal SIB and PBCH to be handled by eNB implementation.
  • the UE detects a certain valid DCI format X2, and the content in this DCI format itself represents MIB information bits.
  • the MIB information bits are included in a PBCH resource as allocated in a granted access, and the size can be rather flexible.
  • the MIB can be defined to use DMRS or truncated CRS in the 6RBs containing MIB.
  • the UE can detect the MIB after detecting PSS/SSS.
  • Both implementation examples offer improved spectrum efficiency and reduce inter-cell interference for SA-NCT.
  • Fig. 5 shows a control unit 10 which may be used by or be part of an entity of a mobile communication system, e.g. an elMB.
  • the control unit 10 includes processing resources (processing circuitry) 11, memory resources (memory circuitry) 12, which may comprise a program, and interfaces (interfacing circuitry) 13 which are connected by a link 14.
  • the control unit 10 may be connected to a control unit 20 through a link 30 via the interfaces 13.
  • the control unit 20 which may be used by or be part of an entity of a user equipment includes processing resources (processing circuitry) 21, memory resources (memory circuitry) 22, which may comprise a program, and interfaces (interfacing circuitry) 23 which are connected by a link 24.
  • the control unit 20 may be connected to the control unit 10 through the link 30 via the interfaces 23.
  • connection means any connection or coupling, either direct or indirect, between two or more elements, and may encompass the presence of one or more intermediate elements between two elements that are “connected” or “coupled” together.
  • the coupling or connection between the elements can be physical, logical, or a combination thereof.
  • two elements may be considered to be “connected” or “coupled” together by the use of one or more wires, cables and printed electrical
  • At least one of the programs stored in the memory resources 12, 22 is assumed to include program instructions that, when executed by the associated
  • processing resources 11, 21, enable the electronic device to operate in
  • Inherent in the processing resources 11, 21 is a clock to enable synchronism among the various apparatus for transmissions and receptions within the appropriate time intervals and slots required, as the scheduling grants and the granted resources/subframes are time dependent.
  • the interfaces 13, 23 include transceivers which include both transmitter and receiver, and inherent in each is a modulator/demodulator commonly known as a modem.
  • the exemplary embodiments of this invention may be implemented by computer software stored in the memory resources 12, 22 and executable by the processing resources 11, 21, or by hardware, or by a combination of software and/or firmware and hardware in any or all of the devices shown.
  • the various embodiments of the UE described above can include, but are not limited to, mobile stations, cellular telephones, personal digital assistants (PDAs) having wireless communication capabilities, portable computers having wireless communication capabilities, image capture devices such as digital cameras having wireless communication capabilities, gaming devices having wireless communication capabilities, music storage and playback appliances having wireless communication capabilities, Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • PDAs personal digital assistants
  • portable computers having wireless communication capabilities
  • image capture devices such as digital cameras having wireless communication capabilities
  • gaming devices having wireless communication capabilities
  • music storage and playback appliances having wireless communication capabilities
  • Internet appliances permitting wireless Internet access and browsing, as well as portable units or terminals that incorporate combinations of such functions.
  • the memory resources 12, 22 may be of any type suitable to the local technical environment and may be implemented using any suitable data storage
  • the processing resources 11, 21 may be of any type suitable to the local technical environment, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on a multi-core processor architecture, as non-limiting examples.
  • circuitry refers to all of the following:
  • processor(s) software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) to circuits, such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry' applies to all uses of this term in this application, including in any claims.
  • the term 'circuitry' would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
  • the term 'circuitry' would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or applications processor integrated circuit for a mobile phone or a similar integrated circuit in server, a cellular network device, or other network device.
  • an apparatus providing initial access for a standalone carrier type of a cell of a mobile communication system which may contain or use the control unit 10
  • the means for determining may determine the frequency resources of the information block to be the same as frequency resources of the synchronization signals, and determine the time resources of the information block to have a fixed offset relative to time resources of the synchronization signals.
  • the means for determining may determine the frequency and time resources of the information block to have offsets relative to frequency and time resources of the synchronization signals.
  • the means for determining may determine the offsets to be linked to an identification of the cell or a physical cell identification.
  • the means for determining may determine the offsets to be obtainable by the user equipment via blind detections among several possible offsets.
  • the means for determining may indicate a hopping position of the information block in a sequence based on the synchronization signals or a new sequence.
  • the means for determining may determine the frequency and time resources of the information block by using a downlink control channel in a common search space linked to the synchronization signals.
  • the means for determining may determine the frequency and time resources of the information block aperiodically directly after detection of the synchronization signals, or the means for including may include the information block in resource blocks of a format of downlink control information of the downlink control channel.
  • the means for determining and including may implemented by the processing resources 11, the memory resources 12 and the interfaces 13.
  • an apparatus for providing initial access for a standalone carrier type of a cell of a mobile communication system which may contain or use the control unit 20, comprising means for synchronizing with the cell in time and frequency based on synchronization signals broadcasted in the cell, means for searching, in resource blocks broadcasted in the cell which are within a predetermined detection range from frequency and/or time resources of the synchronization signals, for an information block which includes parameters necessary for a user equipment to access the cell, and means for accessing the cell with the parameters included in the information block detected as a result of the searching.
  • the apparatus may comprise means for determining an offset between frequency resources of the information block and a center frequency for fast Fourier transformation from an identification of the cell or a physical cell identification, and/or configuration information contained in the information block.
  • the means for searching may search for the information block based on information in a downlink control channel in a common search space linked to the synchronization signals.
  • the information in the downlink control channel may be acquired by the means for searching directly after detection of the
  • the means for searching may search for the information block in resource blocks having a format of downlink control information of the downlink control channel.
  • the means for synchronizing, searching, accessing and determining may be implemented by the processing resources 21, memory resources 22 and interfaces 23.
  • frequency and time resources of an information block which includes parameters necessary for a user equipment to access the cell are determined with respect to
  • the information block is included in resource blocks to be broadcasted in the cell, according to the determined frequency and time resources.
  • a use equipment synchronizes with the cell in time and frequency based on the synchronization signals broadcasted in the cell, and searches, in resource blocks broadcasted in the cell which are within a predetermined detection range from frequency and/or time resources of the synchronization signals, for the information block.
  • the user equipment accesses the cell with the parameters included in the information block detected as a result of the searching.

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

Abstract

Selon la présente invention, en vue de fournir un accès initial pour un type de porteuse autonome d'une cellule d'un système de communication mobile, les ressources de fréquence et de temps d'un bloc d'informations qui comprend des paramètres nécessaires pour un équipement d'utilisateur afin d'accéder à la cellule sont déterminées (S10) par rapport à des signaux de synchronisation utilisés pour synchroniser en temps et en fréquence l'équipement d'utilisateur à la cellule. Le bloc d'informations est inclus (S11) dans des blocs de ressources destinés à être diffusés dans la cellule en fonction des ressources déterminées en temps et en fréquence. Un équipement d'utilisateur se synchronise en temps et en fréquence avec la cellule en fonction des signaux de synchronisation diffusés dans la cellule, et recherche, dans les blocs de ressources diffusés dans la cellule qui se trouvent à l'intérieur d'une plage de détection préterminée par rapport aux ressources en fréquence et/ou en temps des signaux de synchronisation, le bloc d'informations. En résultat à cette recherche, l'équipement d'utilisateur accède à la cellule à l'aide des paramètres inclus dans le bloc d'informations détecté.
PCT/CN2012/083009 2012-10-16 2012-10-16 Accès initial pour type de porteuse autonome WO2014059591A1 (fr)

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PCT/CN2012/083009 WO2014059591A1 (fr) 2012-10-16 2012-10-16 Accès initial pour type de porteuse autonome

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Application Number Priority Date Filing Date Title
PCT/CN2012/083009 WO2014059591A1 (fr) 2012-10-16 2012-10-16 Accès initial pour type de porteuse autonome

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Cited By (7)

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WO2018071156A1 (fr) * 2016-10-14 2018-04-19 Qualcomm Incorporated Transmission de bloc d'informations de système
JP2019525672A (ja) * 2016-08-26 2019-09-05 クアルコム，インコーポレイテッド 制御チャネル帯域幅の決定
CN111052625A (zh) * 2016-04-20 2020-04-21 康维达无线有限责任公司 下行链路同步
CN111499625A (zh) * 2015-08-14 2020-08-07 上海海雁医药科技有限公司 食欲素受体拮抗剂受体化合物的制备方法及其中间体和晶型
US11770821B2 (en) 2016-06-15 2023-09-26 Interdigital Patent Holdings, Inc. Grant-less uplink transmission for new radio
US11871451B2 (en) 2018-09-27 2024-01-09 Interdigital Patent Holdings, Inc. Sub-band operations in unlicensed spectrums of new radio
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CN102461270A (zh) * 2009-06-26 2012-05-16 诺基亚公司 便于切换至封闭订户组小区的系统、方法和装置
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Cited By (16)

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Publication number Priority date Publication date Assignee Title
CN111499625B (zh) * 2015-08-14 2022-09-02 上海海雁医药科技有限公司 食欲素受体拮抗剂受体化合物的制备方法及其中间体和晶型
CN111499625A (zh) * 2015-08-14 2020-08-07 上海海雁医药科技有限公司 食欲素受体拮抗剂受体化合物的制备方法及其中间体和晶型
CN111052625A (zh) * 2016-04-20 2020-04-21 康维达无线有限责任公司 下行链路同步
US11770821B2 (en) 2016-06-15 2023-09-26 Interdigital Patent Holdings, Inc. Grant-less uplink transmission for new radio
JP2019525672A (ja) * 2016-08-26 2019-09-05 クアルコム，インコーポレイテッド 制御チャネル帯域幅の決定
JP7022740B2 (ja) 2016-08-26 2022-02-18 クアルコム，インコーポレイテッド 制御チャネル帯域幅の決定
US10462731B2 (en) 2016-10-14 2019-10-29 Qualcomm Incorporated System information block transmission
WO2018071156A1 (fr) * 2016-10-14 2018-04-19 Qualcomm Incorporated Transmission de bloc d'informations de système
EP3526926A1 (fr) * 2016-10-14 2019-08-21 QUALCOMM Incorporated Transmission de bloc d'informations de système
CN109804593B (zh) * 2016-10-14 2021-12-07 高通股份有限公司 系统信息块传输的方法和装置
CN113949498A (zh) * 2016-10-14 2022-01-18 高通股份有限公司 系统信息块传输的方法和装置
CN109804593A (zh) * 2016-10-14 2019-05-24 高通股份有限公司 系统信息块传输
US10028203B2 (en) 2016-10-14 2018-07-17 Qualcomm Incorporated System information block transmission
CN113949498B (zh) * 2016-10-14 2024-03-15 高通股份有限公司 系统信息块传输的方法和装置
US11877308B2 (en) 2016-11-03 2024-01-16 Interdigital Patent Holdings, Inc. Frame structure in NR
US11871451B2 (en) 2018-09-27 2024-01-09 Interdigital Patent Holdings, Inc. Sub-band operations in unlicensed spectrums of new radio

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