US20120113908A1 - Method of Enhancing Uplink Transmission and Related Communication Device - Google Patents

Method of Enhancing Uplink Transmission and Related Communication Device Download PDF

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Publication number
US20120113908A1
US20120113908A1 US13/102,069 US201113102069A US2012113908A1 US 20120113908 A1 US20120113908 A1 US 20120113908A1 US 201113102069 A US201113102069 A US 201113102069A US 2012113908 A1 US2012113908 A1 US 2012113908A1
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Prior art keywords
signaling
hopping
sequence
transmission
time shift
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Abandoned
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US13/102,069
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English (en)
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Yu-Chih Jen
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HTC Corp
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HTC Corp
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Publication date
Application filed by HTC Corp filed Critical HTC Corp
Priority to CN2011101172336A priority Critical patent/CN102238551A/zh
Priority to TW100116094A priority patent/TWI436612B/zh
Priority to US13/102,069 priority patent/US20120113908A1/en
Assigned to HTC CORPORATION reassignment HTC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JEN, YU-CHIH
Publication of US20120113908A1 publication Critical patent/US20120113908A1/en
Abandoned legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/365—Power headroom reporting
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading

Definitions

  • the application relates to a method and a related communication device used in a wireless communication system and related communication device, and more particularly, to a method of enhancing uplink transmission and a related communication device in a wireless communication system.
  • an evolved universal terrestrial radio access network includes a plurality of evolved Node-Bs (eNBs) and communicates with a plurality of mobile stations, also referred as to user equipments (UEs).
  • eNBs evolved Node-Bs
  • UEs user equipments
  • LTE-A long term evolution-advanced
  • a relay can be deployed at the cell edge where the eNB is unable to provide required radio quality/throughput for the UEs or at certain location where radio signals of the eNB cannot cover.
  • the LTE-A system can support a wider bandwidth up to 100 MHz to satisfy requirement for peak data rate.
  • Coordinated multi-point (CoMP) transmission/reception is considered for the LTE-A as a tool to improve the coverage of high data rates, the cell-edge throughput and/or to increase system throughput.
  • CoMP Coordinated multi-point
  • the main idea of the CoMP transmission/reception is as follows: when a UE is in the cell-edge region, it may be able to receive signals from multiple cell sites and the transmission of the UE may be received at multiple cell sites regardless of the system load. Given that, if the signaling transmitted from the multiple cell sites is coordinated, the DL performance can be increased significantly. This coordination can be simple as in the techniques that focus on interference avoidance or more complex as in the case where the same data is transmitted from multiple cell sites. For the UL, since the signal can be received by multiple cell sites, if the scheduling is coordinated from the different cell sites, the system can take advantage of this multiple reception to significantly improve the link performance.
  • reference signals can be embedded into transmitted signals.
  • the reference signals are multiplexed with the data symbols (which are unknown at the receiver) either in frequency, time or code domain.
  • the uplink reference signals in LTE are mostly based on Zadoff-Chu (ZC) sequences. Theses sequences satisfy the desirable properties for reference signals, exhibiting 0 dB, ideal cyclic autocorrelation, and optimal cross-correlation.
  • ZC Zadoff-Chu
  • RS base reference signal
  • Sequence hopping and/or sequence group hopping of reference signal sequence(s) may not be sufficient in HetNet deployment to mitigate intra-cell/inter-cell interference. For, there might be more than 30 cells having the same hopping pattern while their base sequence and cyclic time shift are not under control of Macro cell (s) or network planning.
  • the sequence hopping/shift patterns are decided every radio frame and/or by cell ID and/or broadcast signaling of sequence offset for RS on PUSCH.
  • uplink reference signals include enabling channel estimation to aid coherent demodulation, channel quality estimation for uplink scheduling, power control, timing estimation an direction-of-arrival estimation to support downlink beamforming.
  • Two types of reference signal are supported on uplink: demodulation reference signal (DM RS) and sounding reference signal (SRS).
  • DM RS demodulation reference signal
  • SRS sounding reference signal
  • the SRS are primarily used for channel quality estimation to enable frequency-selective scheduling on the uplink.
  • IFDMA Interleaved FDMA
  • RPF RePetition Factor
  • a method of enhancing uplink transmission in a wireless communication system is provided.
  • a method of enhancing uplink transmission or signaling for a mobile in a wireless communication system comprises receiving a signaling or configuration message of at least one spectrum technology utilized for corresponding uplink transmission or signaling; and applying each of the at least one spectrum technology for each corresponding uplink transmission or signaling according to the signaling or the configuration message.
  • a method of enhancing uplink transmission for a network in a wireless communication system comprises sending a signaling or a configuration message to a mobile device to dynamically or semi-statically change a configuration of the mobile device for uplink transmission or signaling by the mobile device.
  • a method of enhancing uplink transmission for a network in a wireless communication system comprises dynamically changing at least one of a repetition factor (RPF), length of a sounding reference signal (SRS) sequence, dynamic SRS transmission duration, the number of the SRS sequence, the number of cyclic time shift, and transmission comb for dynamic SRS transmission.
  • RPF repetition factor
  • SRS sounding reference signal
  • a communication device of enhancing uplink transmission or signaling for a mobile in a wireless communication system comprises means for receiving a signaling or configuration message of at least one spectrum technology utilized for corresponding uplink transmission or signaling; and means for applying each of the at least one spectrum technology for each corresponding uplink transmission or signaling according to the signaling or the configuration message.
  • a communication device of enhancing uplink transmission for a network in a wireless communication system comprises means for sending a signaling or a configuration message to a mobile device to dynamically or semi-statically change a configuration of the mobile device for uplink transmission or signaling by the mobile device.
  • a communication device of enhancing uplink transmission for a network in a wireless communication system comprises means for dynamically changing at least one of a repetition factor (RPF), length of a sounding reference signal (SRS) sequence, dynamic SRS transmission duration, the number of the SRS sequence, the number of cyclic time shift, and transmission comb for dynamic SRS transmission.
  • RPF repetition factor
  • SRS sounding reference signal
  • FIG. 1 is a schematic diagram of an exemplary wireless communication system.
  • FIG. 2 is a schematic diagram of an exemplary communication device.
  • FIG. 3 illustrates the program code in FIG. 2 .
  • FIG. 4 is a flow chart of an exemplary process.
  • FIG. 5 is a flow chart of an exemplary process.
  • FIG. 6 is a flow chart of an exemplary process.
  • FIG. 1 is a schematic diagram of an exemplary wireless communication system 10 .
  • the wireless communication system 10 can be an LTE-Advanced system, or other mobile communication systems (e.g. LTE, WCDMA, HSPA, GSM, EDGE, etc.).
  • the wireless communication system 10 is briefly composed of a network and a plurality of user equipments (UEs), as the structure illustrated in FIG. 1 .
  • the network is referred as an evolved universal terrestrial radio access network (E-UTRAN) comprising a plurality of evolved base stations (eNBs).
  • E-UTRAN evolved universal terrestrial radio access network
  • eNBs evolved base stations
  • the UEs can be devices such as mobile phones, computer systems, etc.
  • the network and the UE can be seen as a transmitter or receiver according to transmission direction, e.g., for uplink (UL), the UE is the transmitter and the network is the receiver, and for downlink (DL), the network is the transmitter and the UE is the receiver.
  • UL uplink
  • DL downlink
  • FIG. 2 is a schematic diagram of an exemplary communication device 20 .
  • the communication device 20 can be the UE or the network shown in FIG. 1 and may include a processing means 200 such as a microprocessor or ASIC, a memory unit 210 , and a communication interfacing unit 220 .
  • the memory unit 210 may be any data storage device that can store program code 214 for access by the processing means 200 . Examples of the memory unit 210 include but are not limited to a subscriber identity module (SIM), read-only memory (ROM), random-access memory (RAM), CD-ROMs, magnetic tapes, floppy disks, and optical data storage devices.
  • SIM subscriber identity module
  • ROM read-only memory
  • RAM random-access memory
  • CD-ROMs compact discs
  • magnetic tapes magnetic tapes
  • floppy disks floppy disks
  • optical data storage devices optical data storage devices.
  • the communication interfacing unit 220 is preferably a radio transceiver for wirelessly communicating with the network according to processing results of
  • the program code 214 includes program code of multiple communications protocol layers, which from top to bottom are a radio resource control (RRC) layer 300 , a packet data convergence protocol (PDCP) layer 310 , a radio link control (RLC) layer 320 , a medium access control (MAC) layer 330 and a physical (PHY) layer 340 .
  • the PHY layer 340 includes physical channels, such as Physical Random Access Channel (PRACH), Physical Uplink Control Channel (PUCCH), Physical Uplink Shared Channel (PUCCH), Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDCCH).
  • PRACH Physical Random Access Channel
  • PUCCH Physical Uplink Control Channel
  • PUCCH Physical Uplink Shared Channel
  • PDCCH Physical Downlink Control Channel
  • PDCCH Physical Downlink Shared Channel
  • FIG. 4 is a flow chart of an exemplary process 40 .
  • the process 40 is used for enhancing uplink transmission for a UE in a wireless communication system.
  • the wireless communication system could be the wireless communication system 10 .
  • the process 40 can be compiled into the program code 214 and includes the following steps:
  • Step 400 Start.
  • Step 402 Receive a signaling or configuration message of at least one spectrum technology utilized for corresponding uplink transmission or signaling.
  • Step 404 Apply each of the at least one spectrum technology for each corresponding uplink transmission or signaling according to the signaling or the configuration message.
  • Step 406 End.
  • the UE receives the signaling or configuration message of at least one spectrum technology utilized for corresponding uplink transmission or signaling from a network.
  • the signaling may be referred as to a cell broadcast signaling and/or a UE dedicated signaling.
  • the UE applies each of the at least one spectrum technology for each corresponding uplink transmission or signaling according to the signaling or the configuration message.
  • the one or more spread spectrum technologies may be referred as to at least one of a sequence hopping, sequence group hopping/shifting, cyclic time shift hopping/remapping and orthogonal cover code.
  • the UE can be configured with sequence hopping, sequence group hopping/shifting, cyclic time shift hopping/remapping and/or orthogonal cover code by cell broadcasting signaling and/or UE dedicated signaling (e.g. assume cell ID is known) for the uplink transmission.
  • the hopping/shifting patterns corresponding to sequence group hopping is preferably generated by a pseudo random sequence generator and used by the UE.
  • the number of the hopping/shifting patterns is greater than seventeen. Compared to the prior art, more hopping/shift patterns are available.
  • the uplink transmission may be referred as to PUSCH transmission, PUCCH transmission or reference signal transmission.
  • FIG. 5 is a flow chart of an exemplary process 50 .
  • the process 50 is used for enhancing downlink transmission for a network in a wireless communication system.
  • the wireless communication system could be the wireless communication system 10 .
  • the process 50 can be compiled into the program code 214 and includes the following steps:
  • Step 500 Start.
  • Step 502 Send a signaling or a configuration message to a UE to dynamically or semi-statically change a configuration of the mobile device for uplink transmission or signaling by the UE.
  • Step 504 End.
  • the network sends a signaling or a configuration message to the UE to dynamically or semi-statically change a configuration of the UE for uplink transmission or signaling by the UE.
  • the signaling may be referred as to a RRC signaling or PDCCH signaling.
  • the configuration may includes configurations on the sequence hopping and/or sequence group hopping/shifting and/or cyclic time shift hopping/remapping and/or orthogonal cover code.
  • the configuration on sequence hopping, sequence group hopping/shifting, cyclic time shift hopping/remapping and/or orthogonal cover code can be dynamically changed by network (e.g. through configuration by RRC signaling or PDCCH signaling).
  • the PDCCH signaling dynamically changes at least one of sequence shift offset, hopping pattern, PUCCH resource index and cyclic time shift offset.
  • FIG. 6 is a flow chart of an exemplary process 60 .
  • the process 60 is used for enhancing downlink transmission for a network in a wireless communication system.
  • the wireless communication system could be the wireless communication system 10 .
  • the process 60 can be compiled into the program code 214 and includes the following steps:
  • Step 600 Start.
  • Step 602 Dynamically change at least one of a repetition factor (RPF), length of a sounding reference signal (SRS) sequence, dynamic SRS transmission duration, the number of the SRS sequence, the number of cyclic time shift, and transmission comb for dynamic SRS transmission.
  • RPF repetition factor
  • SRS sounding reference signal
  • Step 604 End.
  • the network dynamically changes at least one of a repetition factor (RPF), length of a sounding reference signal (SRS) sequence, dynamic SRS transmission duration, the number of the SRS sequence, the number of cyclic time shift, and transmission comb for dynamic SRS transmission.
  • RPF repetition factor
  • SRS sounding reference signal
  • the transmission comb provides another means to multiplex UE reference signals in addition to the cyclic time shift.
  • the dynamic SRS transmission may be aperiodic and scheduled for the UE.
  • the network can dynamically and easily adjust UE load on transmitting SRS. Therefore, the length of SRS sequence and number of available SRS sequence in a subframe becomes less restricted (more comb and higher RPF). With higher RPF (e.g. odd number such as 3), SRS RBs could be odd number so as to affect the SRS sequence length.
  • the abovementioned steps including suggested steps can be realized by means that could be hardware, firmware known as a combination of a hardware device and computer instructions and data that reside as read-only software on the hardware device, or an electronic system.
  • hardware can include analog, digital and mixed circuits known as microcircuit, microchip, or silicon chip.
  • the electronic system can include system on chip (SOC), system in package (Sip), computer on module (COM), and the communication device 20 in which the processing means 200 processes the program code 214 related to the abovementioned processes and the processed results can enhance uplink transmission in the wireless communications system 10 .
  • the UE applies more hopping/shifting patterns to a spread spectrum technology for the uplink transmission.
  • the network dynamic change configuration on sequence hopping, sequence hopping/shifting, cyclic time shift hopping/remapping and/or orthogonal cover code.
  • the network uses a larger RFR to provide more flexibility for bandwidth allocation between UEs.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
US13/102,069 2010-05-06 2011-05-06 Method of Enhancing Uplink Transmission and Related Communication Device Abandoned US20120113908A1 (en)

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Application Number Priority Date Filing Date Title
CN2011101172336A CN102238551A (zh) 2010-05-06 2011-05-06 改善上链路传输或信令的方法及其相关通讯装置
TW100116094A TWI436612B (zh) 2010-05-06 2011-05-06 改善上鏈路傳輸或信令之方法及其相關通訊裝置
US13/102,069 US20120113908A1 (en) 2010-05-06 2011-05-06 Method of Enhancing Uplink Transmission and Related Communication Device

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US33218410P 2010-05-06 2010-05-06
US13/102,069 US20120113908A1 (en) 2010-05-06 2011-05-06 Method of Enhancing Uplink Transmission and Related Communication Device

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US20160037567A1 (en) * 2014-07-31 2016-02-04 Microsoft Corporation Cellular feedback transmission for user equipments enabling device-to-device communications
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WO2019098712A1 (ko) * 2017-11-16 2019-05-23 엘지전자 주식회사 Srs를 전송 및 수신하는 방법과 이를 위한 통신 장치
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US20130279620A1 (en) * 2011-01-06 2013-10-24 Alcatel Lucent Methods of transmitting coordinate multiple point data based on ortogonal covering codes
US20140192729A1 (en) * 2011-04-25 2014-07-10 Lg Electronics Inc. Method for transceiving reference signal in wireless access system and terminal therefor
US9479304B2 (en) * 2011-04-25 2016-10-25 Lg Electronics Inc. Method for transceiving reference signal in wireless access system and terminal therefor
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US20180103433A1 (en) * 2016-10-07 2018-04-12 Asustek Computer Inc. Method and apparatus for deriving transmit power of ul (uplink) rs (reference signal) in a wireless communication system
US11737030B2 (en) * 2016-10-07 2023-08-22 Asustek Computer Inc. Method and apparatus for deriving transmit power of UL (uplink) RS (reference signal) in a wireless communication system
WO2019098712A1 (ko) * 2017-11-16 2019-05-23 엘지전자 주식회사 Srs를 전송 및 수신하는 방법과 이를 위한 통신 장치
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US11245564B2 (en) * 2017-11-17 2022-02-08 Xi'an Zhongxing New Software Co., Ltd. Method and device for determining sequence group and cyclic shift
WO2020191702A1 (en) * 2019-03-28 2020-10-01 Panasonic Intellectual Property Corporation Of America Mobile station, base station, reception method, and transmission method

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TWI426800B (zh) 2014-02-11
TW201212681A (en) 2012-03-16
CN102238715B (zh) 2015-04-08
EP2385731B1 (en) 2015-11-11
CN102238715A (zh) 2011-11-09
TWI436612B (zh) 2014-05-01
EP2996414B1 (en) 2017-03-08
EP2385731A3 (en) 2012-03-21
CN102238551A (zh) 2011-11-09
US20120113833A1 (en) 2012-05-10
EP2385652B1 (en) 2014-01-22
EP2385731A2 (en) 2011-11-09
US8526344B2 (en) 2013-09-03
TW201210228A (en) 2012-03-01
EP2385652A1 (en) 2011-11-09
EP2996414A1 (en) 2016-03-16

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