WO2014161106A1 - Canal de synchronisation amélioré pour dispositifs sans fil - Google Patents

Canal de synchronisation amélioré pour dispositifs sans fil Download PDF

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Publication number
WO2014161106A1
WO2014161106A1 PCT/CN2013/000380 CN2013000380W WO2014161106A1 WO 2014161106 A1 WO2014161106 A1 WO 2014161106A1 CN 2013000380 W CN2013000380 W CN 2013000380W WO 2014161106 A1 WO2014161106 A1 WO 2014161106A1
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WO
WIPO (PCT)
Prior art keywords
synchronization signal
secondary synchronization
primary synchronization
communication
primary
Prior art date
Application number
PCT/CN2013/000380
Other languages
English (en)
Inventor
Jianke Fan
Chunyan Gao
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/CN2013/000380 priority Critical patent/WO2014161106A1/fr
Publication of WO2014161106A1 publication Critical patent/WO2014161106A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Definitions

  • the exemplary and non-limiting embodiments of this invention relate generally to wireless communication systems, methods, devices and computer programs and, more specifically, relate to an enhanced synchronization channel for use with low-cost MTC UEs.
  • eNB E-UTRAN Node B (evolved Node B)
  • LTE evolved universal terrestrial radio access network
  • E-UTRAN LTE long term evolution of UTRAN
  • UE user equipment e.g., mobile station, mobile node or mobile terminal
  • Rl-125364 does not provide details for any solution, such as how to avoid the impact on legacy UEs if power boosting is applied and how to share the resources with legacy UEs. Thus, no workable solution is disclosed.
  • a method for controlling a wireless radio device to synchronize with a wireless system comprises: receiving at least one communication from the wireless system, where the received at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and synchronizing with the wireless system using the second primary synchronization signal and the second secondary synchronization signal.
  • the apparatus comprises means for receiving at least one communication from the wireless system, where the received at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and means for synchronizing with the wireless system using the second primary synchronization signal and the second secondary synchronization signal.
  • a computer readable memory tangibly storing a set of computer executable instructions for controlling a wireless radio device to synchronize with a wireless system.
  • the set of computer executable instructions comprises: code for receiving at least one communication from the wireless system, where the received at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and code for synchronizing with the wireless system using the second primary synchronization signal and the second secondary synchronization signal.
  • the apparatus comprises a processing system, and the processing system comprises at least one processor and a memory storing a set of computer instructions.
  • the processing system is configured to cause the wireless radio device at least to: receive at least one communication from the wireless system, where the received at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and synchronize with the wireless system using the second primary synchronization signal and the second secondary synchronization signal.
  • a method for controlling a wireless radio device to synchronize with a wireless system comprises: generating at least one communication, where the generated at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and sending the at least one communication from the wireless system to the wireless radio device.
  • the apparatus comprises means for generating at least one communication, where the generated at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and means for sending the at least one communication from the wireless system to the wireless radio device.
  • a computer readable memory tangibly storing a set of computer executable instructions for controlling a wireless radio device to synchronize with a wireless system.
  • the set of computer executable instructions comprises: code for generating at least one communication, where the generated at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and code for sending the at least one communication from the wireless system to the wireless radio device.
  • an apparatus for controlling a wireless radio device to synchronize with a wireless system comprises a processing system, and the processing system comprises at least one processor and a memory storing a set of computer instructions.
  • the processing system is configured to cause the wireless radio device at least to: generate at least one communication, where the generated at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal; and send the at least one communication from the wireless system to the wireless radio device.
  • Figure 1 shows an exemplary frame wherein the ePSS/eSSS use a different sequence from the PSS/SSS.
  • Figure 2 shows an exemplary frame wherein the fixed time relationship between the ePSS and PSS is different from that between the eSSS and SSS.
  • Figure 3 shows an exemplary arrangement wherein the ePSS/eSSS has a different time separation from the PSS/SSS in different subframes.
  • Figure 4 shows an exemplary arrangement wherein the number of symbols for the ePSS/eSSS is subframe-specific (varies among different subframes).
  • Figure 5 shows an exemplary arrangement wherein the number of ePSS symbols is different from the number of eSSS symbols.
  • Figure 6 shows an exemplary arrangement of the ePSS/eSSS in a TDD system.
  • Figure 7 is a logic flow diagram that illustrates a method for operating a wireless radio device, such as, for example, a user equipment/UE or a network access device, and a result of execution by an apparatus of a set of computer program instructions embodied on a computer readable memory for operating such a device, in accordance with certain exemplary embodiments of this invention.
  • Figure 8 is a simplified block diagram of a UE and a wireless radio network represented by an eNodeB (eNB) and a serving gateway, which are exemplary electronic wireless radio devices suitable for use in practicing the exemplary embodiments of the invention.
  • eNB eNodeB
  • serving gateway exemplary electronic wireless radio devices suitable for use in practicing the exemplary embodiments of the invention.
  • more symbols are included in at least subframes 0 and 5 (e.g., in the central 6 PRBs) and are used for synchronization.
  • these may be denoted as ePSS/eSSS (if also used for NCT) or mPSS/mSSS (if only used for low-cost MTC UEs).
  • ePSS/eSSS if also used for NCT
  • mPSS/mSSS if only used for low-cost MTC UEs.
  • the added ePSS/eSSS may use a different sequence from that of the PSS/SSS.
  • the added ePSS/eSSS symbols may have fixed time separation with respect to the original PSS/SSS.
  • the time relationship between ePSS and PSS may be different from that between eSSS and SSS.
  • the added ePSS/eSSS may have a different time separation with respect to the PSS/SSS in different subframes.
  • the added ePSS/eSSS may have a different period from that of the original PSS/SSS.
  • the number of added ePSS symbols may be different from that of the added eSSS symbols. In other exemplary embodiments, for both FDD and TDD system, the number of added ePSS symbols may be the same as that of the added eSSS symbols.
  • the number of added ePSS/eSSS symbols can be sub frame-specific. That is, more ePSS/eSSS symbols may be added in one subframe than in another subframe.
  • At least some of the exemplary embodiments described herein illustrate how to add more symbols to help the synchronization signals coverage and, further, how to avoid impacting legacy UEs. It should be noted that the exemplary techniques may work together with other coverage enhancement solutions, such as power boosting, for example, in order to provide further improvements.
  • Power boosting had been considered as one common solution for each channel.
  • resource orthogonalization for example, using orthogonal sequences
  • the orthogonal sequence may be a MTC-specific sequence used to reduce interference with legacy UEs.
  • the specific sequence may use one or more different ZC sequence generation formulae. This may be a workable solution if low-cost MTC UEs and legacy UEs are specified using different sequence generators but the 3 "root index" numbers could still remain the same. The sequence then is used as a scrambling sequence for SSS signal transmission.
  • the added ePSS/eSSS may be located only in the central 6 PRBs which is the same location as the original PSS/SSS. This is due to the consideration that in subframes 0,5 for FDD or subframes 0,1,5,6 for TDD, the other symbols in the central 6 PRBs are not otherwise occupied and, as such, adding more symbols there will not reduce available resources for legacy UEs.
  • the added ePSS/eSSS symbols may have a fixed time relationship with that of the PSS/SSS.
  • additional technique(s) may be utilized to avoid impacting legacy UEs's SCH detection.
  • the specific examples discussed below e.g., specific numbers of subframes and/or specific separations discussed
  • the exemplary embodiments of the invention, as described herein, may be utilized in any suitable arrangement (e.g., with any suitable subframe and/or with any suitable separation).
  • each subframe has two slots and each slot has seven symbols.
  • Example #2 ( Figure 2): The fixed time relationship between ePSS and PSS is different from that between eSSS and SSS.
  • ePSS is placed in the 8 th symbol (symbol #7), which is one symbol later than the original PSS, while eSSS is placed in the 5 th symbol (symbol #4), which is one symbol earlier than the original SSS.
  • Example #3 ( Figure 3): The newly added ePSS/eSSS may have a different time separation with the PSS/SSS in different subframes. As shown in Figure 3, in subframes 0, 10, the ePSS/eSSS are 4 symbols later than the original PSS/SSS, while in subframes 5, 15, ePSS/eSSS are 2 symbols later than the original PSS/SSS. This arrangement makes the time interval between two consecutive ePSS/eSSS transmissions different by 5ms and, thus, this avoids having legacy UEs synchronize to them.
  • Example #4 ( Figure 4): The number of the newly added symbols of ePSS/eSSS can be subframe-specific. As shown in Figure 4, the number of ePSS/eSSS symbols can be different per subframe. As an example, there may be 1 ePSS/eSSS symbol in subframes 0, 10, while there are 2 ePSS/eSSS symbols in subframes 5, 15. Such patterns are different from that of the original PSS/SSS design and avoid legacy UE synchronization with the new ePSS/eSSS.
  • Example #5 ( Figure 5): The number of newly added ePSS symbols can be different from that of the newly added eSSS symbols. As shown in Figure 5, a different number of symbols can be added for PSS and SSS. In this example, twice as many ePSS symbols are added as eSSS symbols. Since PSS detection is usually done first, this would help speed up the synchronization process.
  • Example #6 ( Figure 6): Add ePSS/eSSS in TDD systems.
  • ePSS/eSSS can be inserted in subframes 0, 1, 5, 6 for TDD systems to make full use of the 6 central PRBs in those subframes.
  • the time relationship between ePSS/PSS is different from that of eSSS/SSS (for example, the two newly added symbols for ePSS/eSSS or mPSS/mSSS can be placed at the 6 th symbol of subframe 0 and the 4 th symbol of a special subframe). This helps avoid synchronization to the wrong symbol by legacy UEs.
  • TS 36.211 3 GPP TS 36.211 VI 1.2.0, "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation (Release 11),” February 2013). More specifically, reference is made to Section 4.2, Figure 4.2-1 and Table 4.2-2 in TS 36.211, wherein it is specified that for all uplink-downlink configurations a special subframe occurs at subframe 1 and for most uplink-downlink configurations (0, 1, 2, 6) a special subframe also occurs at subframe 6.
  • Exemplary embodiments of these teachings provide the technical effect of improving synchronization signal coverage for UEs (e.g., low-cost MTC UEs) without adversely affecting legacy UEs (e.g., UEs operating according to existing specifications). While at least some of the above-described exemplary embodiments utilize a different PSS/SSS (e.g., ePSS/eSSS, mPSS/mSSS) from the conventional PSS/SSS, the synchronization process that is employed otherwise may remain unaffected. That is, a low-cost MTC UE utilizing one or more of the exemplary embodiments still may utilize a conventional process for synchronizing with the wireless network.
  • PSS/SSS e.g., ePSS/eSSS, mPSS/mSSS
  • a different or new synchronization process may be used.
  • Concerning the conventional/legacy synchronization process reference is made to TS 36.304 (3GPP TS 36.304 VI 1.3.0, "3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedures in idle mode (Release 11),” March 2013).
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • UE User Equipment
  • Figure 7 presents a summary of some of the above exemplary teachings for controlling a wireless radio device, such as a UE or a network node (e.g., network access node, eNB, Node B, relay node, RNC) to improve synchronization signal coverage for UEs (e.g., MTC UEs, low-cost MTC UEs).
  • a wireless radio device such as a UE or a network node (e.g., network access node, eNB, Node B, relay node, RNC) to improve synchronization signal coverage for UEs (e.g., MTC UEs, low-cost MTC UEs).
  • UE e.g., MTC UEs, low-cost MTC UEs
  • a UE can be implemented as a mobile phone, mobile terminal, mobile node, cellular handset and the like
  • the network node can be implemented as an eNodeB, a NodeB, a base station, an access point
  • the UE receives at least one communication from the wireless system (e.g., via the network node), where the received at least one communication includes a plurality of different synchronization signals comprising a first primary synchronization signal, a first secondary synchronization signal, a second primary synchronization signal and a second secondary synchronization signal.
  • the UE synchronizes with the wireless system using the second primary synchronization signal and the second secondary synchronization signal.
  • blocks 704-710 may be used.
  • the second primary synchronization signal and the second secondary synchronization signal are located in a central six physical resource blocks of a frame of the at least one communication.
  • the second primary synchronization signal and the second secondary synchronization signal are located in at least subframes 0 and 5 (e.g., FDD) or in at least subframes 0, 1, 5 and 6 (e.g., TDD).
  • the second primary synchronization signal and the second secondary synchronization signal have a different period from the first primary synchronization signal and the first secondary synchronization signal.
  • a number of symbols for at least one of the second primary synchronization signal and the second secondary synchronization signal varies between at least two different subframes.
  • Figure 7 describes the operation of a UE communicating with a wireless system (e.g., via a network node), it should be apparent that the network node may be seen to operate in kind, for example, by generating and transmitting the described signal(s).
  • the logic diagram of Figure 7, and the summary above from the perspective of the wireless radio device may be considered to illustrate the operation of a method, and a result of execution of a computer program stored in a computer readable memory, and a specific manner in which components of an electronic device are configured to cause that electronic device to operate, whether such an electronic device is the UE, the access node/eNB, or one or more components thereof such as a modem, chipset, or the like.
  • the various blocks shown in Figure 7 or described in the text above may also be considered as a plurality of coupled logic circuit elements constructed to carry out the associated function(s), or specific result of strings of computer program code or instructions stored in a memory.
  • Such blocks and the functions they represent are non-limiting examples, and may be practiced in various components such as integrated circuit chips and modules, and that the exemplary embodiments of this invention may be realized in an apparatus that is embodied as an integrated circuit.
  • the integrated circuit, or circuits may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or data processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry that are configurable so as to operate in accordance with the exemplary embodiments of this invention.
  • circuit(s)/circuitry may include any of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) combinations of circuits and software (and/or firmware), such as: (i) a combination of processor(s) or (ii) portions of processor(s)/software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a user equipment/mobile terminal or an access node/eNB, to perform the various functions summarized at Figures 1-7 and above and (c) 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 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.
  • circuitry also covers, for example, a baseband integrated circuit or applications processor integrated circuit for a UE or a similar integrated circuit in a network access node or other network device which operates according to these teachings.
  • an eNB 22 is adapted for communication over a wireless link 21 with an apparatus, such as a mobile terminal or UE 20.
  • the eNB 22 may be any access node (including frequency selective repeaters) of any wireless network, such as LTE, LTE-A, GSM, GERAN, WCDMA, WLAN and the like.
  • the operator network of which the eNB 22 is a part may also include a network control element such as a mobility management entity MME and/or serving gateway SGW 24 or radio network controller RNC which provides connectivity with further networks (e.g., a publicly switched telephone network PSTN and/or a data communications network/Internet).
  • the UE 20 includes processing means such as at least one data processor (DP) 20A, storing means such as at least one computer-readable memory (MEM) 20B storing at least one computer program (PROG) 20C, communicating means such as a transmitter TX 20D and a receiver RX 20E for bidirectional wireless communications with the eNB 22 via one or more antennas 20F (one shown per the above examples).
  • DP data processor
  • MEM computer-readable memory
  • PROG computer program
  • the eNB 22 also includes processing means such as at least one data processor (DP) 22A, storing means such as at least one computer-readable memory (MEM) 22B storing at least one computer program (PROG) 22C, and communicating means such as a transmitter TX 22D and a receiver RX 22E for bidirectional wireless communications with the UE 20 via one or more antennas 22F (four shown).
  • processing means such as at least one data processor (DP) 22A
  • storing means such as at least one computer-readable memory (MEM) 22B storing at least one computer program (PROG) 22C
  • communicating means such as a transmitter TX 22D and a receiver RX 22E for bidirectional wireless communications with the UE 20 via one or more antennas 22F (four shown).
  • At least one of the PROGs 20C in the UE 20 is assumed to include a set of program instructions that, when executed by the associated DP 20A, enable the device to operate in accordance with the exemplary embodiments of this invention, as detailed above of which some are summarized at Figures 1-7.
  • the eNB 22 also has software stored in its MEM 22B to implement certain aspects of these teachings according to the above detailed embodiments.
  • the exemplary embodiments of this invention may be implemented at least in part by computer software stored on the MEM 20B, 22B which is executable by the DP 20A of the UE 20 and/or by the DP 22A of the eNB 22, or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • Electronic devices implementing these aspects of the invention need not be the entire devices as depicted at Figure 8 or may be one or more components of same such as the above described tangibly stored software, hardware, firmware and DP, or a system on a chip SOC or an application specific integrated circuit ASIC.
  • the various exemplary embodiments of the UE 20 can include, but are not limited to personal portable digital devices having wireless communication capabilities, including but not limited to cellular and other types of mobile telephones, mobile terminals, navigation devices, laptop/palmtop/tablet computers, digital cameras and music devices, and Internet appliances.
  • personal portable digital devices having wireless communication capabilities, including but not limited to cellular and other types of mobile telephones, mobile terminals, navigation devices, laptop/palmtop/tablet computers, digital cameras and music devices, and Internet appliances.
  • Various exemplary embodiments of the computer readable MEMs 20B, 22B include any data storage technology type which is suitable to the local technical environment, including but not limited to semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory, removable memory, disc memory, flash memory, DRAM, SRAM, EEPROM and the like.
  • Various exemplary embodiments of the DPs 20A, 22A include but are not limited to general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and multi-core processors.

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

Abstract

Dans un exemple de mode de réalisation de l'invention, un procédé pour commander un dispositif radio sans fil pour qu'il se synchronise sur un système sans fil consiste à : recevoir au moins une communication du système sans fil, ladite au moins une communication reçue contenant une pluralité de différents signaux de synchronisation comprenant un premier signal de synchronisation primaire, un premier signal de synchronisation secondaire, un deuxième signal de synchronisation primaire et un deuxième signal de synchronisation secondaire ; et effectuer la synchronisation avec le système sans fil au moyen du deuxième signal de synchronisation primaire et du deuxième signal de synchronisation secondaire.
PCT/CN2013/000380 2013-04-01 2013-04-01 Canal de synchronisation amélioré pour dispositifs sans fil WO2014161106A1 (fr)

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WO2016203290A1 (fr) * 2015-06-15 2016-12-22 Telefonaktiebolaget Lm Ericsson (Publ) Format de bloc de synchronisation variable
US20180206241A1 (en) * 2015-01-30 2018-07-19 Kyocera Corporation Base station and user terminal
CN108632983A (zh) * 2017-03-24 2018-10-09 华为技术有限公司 传输信号的方法和装置
WO2019022481A1 (fr) * 2017-07-24 2019-01-31 Samsung Electronics Co., Ltd. Procédé et appareil pour signaux de synchronisation et amélioration de bloc pbch
JP2019522910A (ja) * 2016-06-21 2019-08-15 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッドＧｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． 信号を伝送する方法、ネットワーク装置及び端末装置

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US20180206241A1 (en) * 2015-01-30 2018-07-19 Kyocera Corporation Base station and user terminal
CN107736060A (zh) * 2015-06-15 2018-02-23 瑞典爱立信有限公司 可变同步块格式
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JP2019522910A (ja) * 2016-06-21 2019-08-15 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッドＧｕａｎｇｄｏｎｇ Ｏｐｐｏ Ｍｏｂｉｌｅ Ｔｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎｓ Ｃｏｒｐ．， Ｌｔｄ． 信号を伝送する方法、ネットワーク装置及び端末装置
EP3905787A1 (fr) * 2016-06-21 2021-11-03 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Plusieurs signaux de synchronisation dans une seule période de transmission
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WO2019022481A1 (fr) * 2017-07-24 2019-01-31 Samsung Electronics Co., Ltd. Procédé et appareil pour signaux de synchronisation et amélioration de bloc pbch

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