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WO2013139248A1 - Système, dispositif et procédé de démodulation de données - Google Patents

Système, dispositif et procédé de démodulation de données Download PDF

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Publication number
WO2013139248A1
WO2013139248A1 PCT/CN2013/072833 CN2013072833W WO2013139248A1 WO 2013139248 A1 WO2013139248 A1 WO 2013139248A1 CN 2013072833 W CN2013072833 W CN 2013072833W WO 2013139248 A1 WO2013139248 A1 WO 2013139248A1
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WO
WIPO (PCT)
Prior art keywords
hopping
sequence
group
information
network side
Prior art date
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Ceased
Application number
PCT/CN2013/072833
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English (en)
Chinese (zh)
Inventor
马瑞泽•大卫
周明宇
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
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Publication of WO2013139248A1 publication Critical patent/WO2013139248A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0074—Code shifting or hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/261—Details of reference signals
    • H04L27/2613—Structure of the reference signals
    • H04L27/26136—Pilot sequence conveying additional information

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, apparatus, and system for implementing data demodulation.
  • the UE User Equipment
  • the network side device uses the RS (Reference).
  • Signal, reference signal is used to estimate the wireless channel fading, thereby causing the network side device to demodulate the data transmitted by the UE by using the estimated channel fading.
  • the performance of the network side device demodulating the data largely depends on the accuracy of the wireless channel fading estimation, and the accuracy of the wireless channel fading estimation depends on
  • the RS sent by the UE that is, the RS that the UE sends the data at the same time, directly affects the performance of the data demodulation; however, since the UE is interfered by the RS sent by other UEs in the process of transmitting the RS to the network side device, To improve the accuracy of wireless channel fading estimation and improve the performance of data demodulation, it is necessary to reduce the interference received by the UE in transmitting RS.
  • the most effective way to reduce the interference of the UE to transmit the RS is to make the RSs sent by all the UEs orthogonal to each other, that is, to implement orthogonalization of the RS.
  • one UE is usually only served by one cell. Since the network-side device corresponding to one cell cannot know the RS allocated by other cells to its UE, it is not possible to achieve true RS orthogonalization.
  • interference randomization technology is commonly used in the prior art, that is, through the group.
  • the hopping, sequence hopping, or CS (Cyc ic Shift) hopping causes the interference between RSs sent by different UEs to be randomized.
  • CoMP Coordinatd Mul tip le Point transmi ssion/reception
  • the embodiments of the present invention provide a method, an apparatus, and a system for implementing data demodulation, which can enable UEs of different cells to transmit orthogonal RSs, thereby improving data demodulation performance.
  • the present invention provides a method for implementing data demodulation, including: [09] transmitting the same CS hopping information to a UE, where the CS hopping information is used to indicate that the UE turns off group hopping and/or a sequence, and instructing the UE to generate a CS hopping scheme used by the RS;
  • the present invention provides a method for implementing data demodulation, including: [12] receiving CS hopping information sent by a network side device, where the CS hopping information is used to indicate that the UE turns off group hopping and And/or a sequence, and instructing the UE to generate a CS hopping scheme used by the reference signal RS;
  • the present invention provides a network side device for implementing data demodulation, including a transmitting unit and a demodulating unit;
  • the sending unit is configured to send the same CS hopping information to the UE, where the CS hopping information is used to indicate that the UE turns off the group hopping and/or the sequence hopping, and instructs the UE to generate the CS hop used by the RS.
  • the demodulation unit is configured to receive an RS sent by the UE, and estimate a radio channel fading according to the RS, and then demodulate the data information according to the radio channel fading estimation value.
  • the present invention provides an apparatus for implementing data demodulation, including: a receiving unit and a reporting unit; The receiving unit is configured to receive the CS hopping information sent by the network side device, where the CS hopping information is used to indicate that the UE turns off the group hopping and/or the sequence hopping, and instructs the UE to generate the reference signal RS.
  • CS hopping scheme
  • the reporting unit is configured to disable group hopping and/or sequence hopping according to the CS hopping information, and send the RS to the network side device by using the CS hopping scheme.
  • an embodiment of the present invention provides a system for implementing data demodulation, which includes: a network side device and a user equipment UE;
  • the network side device is configured to send the same CS hopping information to the UE, where the CS hopping information is used to indicate that the UE turns off the group hopping and/or sequence hopping, and instructs the UE to generate the CS used by the RS.
  • a hopping scheme acquiring the RS sent by the UE, estimating a radio channel fading according to the RS, and demodulating the data information according to the radio channel fading information;
  • the UE is configured to receive CS hopping information sent by the network side device, where the CS hopping information is used to indicate that the UE turns off the group hopping and/or sequence, and instructs the UE to generate the CS hop used by the reference signal RS. And changing a group hopping and/or sequence hopping according to the CS hopping information and using the CS hopping scheme to generate an RS and then sending the signal to the network side device.
  • the CS hopping information is sent to the UE by using the network side device, so that different UEs use the same CS hopping scheme to generate the RS and turn off the group hopping and/or Or sequence hopping, so that the uplink RSs sent by different UEs are orthogonal to each other, improving data demodulation performance; at the same time, different UEs can still obtain interference randomization technology when there is no need to transmit orthogonal RSs.
  • the benefits enable CoMP technology to be applied to the system to improve performance while still maintaining the benefits of interference with randomization techniques.
  • FIG. 1 is a schematic flow chart of a method for implementing data demodulation according to an embodiment of the present invention
  • 2 is a schematic structural diagram of a network side device for implementing data demodulation according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of an apparatus for implementing data demodulation according to an embodiment of the present invention.
  • An embodiment of the present invention provides a method for implementing data demodulation.
  • the method includes: [30] Step 110: A network side device sends the same CS hopping information to a UE, where The CS hopping information is used to instruct the UE to turn off the group hopping and/or the sequence of the sequence, and instructs the UE to generate the CS hopping scheme used by the RS; wherein, it is noted that the network side device in the embodiment is required according to system requirements.
  • the same CS hopping information may be sent to multiple UEs, so that multiple UEs use the same CS hopping scheme to generate the RS, which is not repeatedly described herein.
  • the network side device involved in this embodiment may be a base station (BS), an access point (AP), a remote radio equipment (RRE), and a remote device.
  • BS base station
  • AP access point
  • RRE remote radio equipment
  • RRH remote radio head
  • RRU remote radio unit
  • relay node and the like are not specifically limited in this embodiment.
  • the network side device indicates that the UE closes the group hopping and/or sequence hopping, and the following manners are included, but are not limited thereto:
  • a shutdown group hopping and/or a sequence hopping indication is included to indicate that the UE turns off a group hopping and/or a sequence hopping;
  • the preset CS hopping information has a binding relationship with the closed group hopping and/or sequence hopping operation, and when the UE receives the CS hopping information, the group hopping is disabled. And / or sequence jumps.
  • the network side device may send CS hopping information to the UE in the following manner, but is not limited thereto: [36] 1), the network side device sends the CS hopping information to the UE by using scheduling information, where the scheduling information may also be used to indicate a TTI for turning off group hopping and/or sequence hopping ( Transmi ssion Time Interval, the TTI identifier is used to indicate that the UE turns off group hopping and/or sequence hopping in the TTI; [37] For example, if the network side device wants UE1 and UE2 to be in the fourth The uplink RSs sent on the TTI are orthogonal, and the CS hopping information is respectively sent to the UE1 and the UE2 through the scheduling
  • the network side device transmits to the UE at the nth TTI
  • the scheduling information is used to instruct the UE to send an uplink signal to the UE in the n+4th TTI.
  • Each transmission of the UE requires the network side device to send the scheduling information to the UE once, so that the network side device can use the resource according to the usage situation.
  • the CS hopping scheme used, for example, in order to enable UE1 and UE2 to transmit orthogonal uplink RSs on the 4th TTI, so they send scheduling information to them on the 0th TTI to indicate that they use the same CS hopping scheme; On other TTIs, no orthogonality is required, and scheduling information is sent to them on the corresponding TTIs other than the 0th TTI, indicating that they use different CS hopping schemes, or do not send CS hopping information, on the network side.
  • the UE uses the cell-specific CS hopping scheme by default (the network side device broadcasts the parameters related to the cell-specific CS hopping scheme to all UEs in the cell in advance).
  • the CS hopping information sent by the network side device to the UE can indicate that the UE turns off the group hopping and/or sequence hopping, and generates the RS by using the UE-specific CS hopping scheme, thereby enabling the use.
  • the RSs generated by the same CS hopping scheme can be orthogonal, and when the uplink RSs that the network side device does not want the UE to transmit are orthogonal to other UEs, the CS hopping information can no longer be sent to the UE, and the UE continues to enable group hopping. And/or sequence hopping, which allows the UE to obtain the benefits of interference randomization caused by group hopping and/or sequence hopping.
  • the following embodiments may widely use the indication method of the TTI identifier, which is similar to the following, and will not be further described herein.
  • the information that is sent by the network side device to the UE in the form of unicast is UE-specific information, that is, the parameter set for the UE; and the network side device is in the cell.
  • the information sent by all the UEs in the form of a broadcast is the information specific to the cell, that is, the common parameters set for all the UEs in the cell; the following is similar, and details are not described herein again.
  • the network side device sends a set of parameters of the CS hopping scheme to the UE by semi-static signaling in a unicast manner, and uses dynamic signaling to indicate whether the UE uses the CS hopping The parameters of the scheme to generate the RS and whether to turn off the group hopping and/or sequence hopping; or, the network side device unicasts through the semi-static letter And transmitting, by using the dynamic signaling, a number of a CS hopping scheme of the parameters of the multiple sets of CS hopping schemes to trigger the UE to use, by using dynamic signaling to transmit, to the UE, a parameter of a group of CS hopping schemes.
  • the parameters of the set of CS hopping schemes to generate RSs and turn off group hopping and/or sequences;
  • the network side device may send the UE-specific sequence initialization value to the UE through several bits, so that the UE can simultaneously learn the cell-specific sequence initialization value and the UE-specific sequence initialization value, and then the network side device.
  • the UE can be dynamically instructed by dynamic signaling to select one of the two sequence initialization values to generate the RS, thereby dynamically indicating that the UE of the different cell transmits the orthogonal RS while maximally saving the dynamic signaling.
  • the cell-specific sequence initialization value may be determined by the network-side device sending other information to the UE, or may be calculated by the UE according to the cell ID and according to a preset calculation method, which is not specifically limited herein.
  • the network side device may send three sets of sequence initialization values unique to the UE to the UE by using a plurality of bits, so that the UE can simultaneously learn the cell-specific sequence initialization value and the UE-specific three-group sequence initialization value. Then, the network side device can dynamically instruct the UE to select one of the four sequence initialization values to generate the RS through dynamic signaling, thereby dynamically indicating that the UE of different cells is sent while maximally saving dynamic signaling. Orthogonal RS.
  • the network side device may send parameters of at least one group of CS hopping schemes to the UE through semi-static signaling, and may also indicate, for each group of the CS hopping scheme, whether to turn off group hopping and/or Sequence jumps.
  • the network side device may send three sets of sequence initialization values unique to the UE to the UE through several bits, and indicate, for each group of the CS hopping scheme, whether to turn off group hopping and/or sequence, for example, before the three groups The two groups need to be closed, and the last group does not need to turn off the group hopping and/or sequence hopping; then the network side device can dynamically instruct the UE to select one of the four sequence initialization values to generate the RS through dynamic signaling.
  • the UE If the first group is selected, the UE generates the RS by using the parameters of the CS hopping scheme corresponding to the first group, and turns off the group hopping and/or sequence hopping; if the third group is selected, the UE uses the third group.
  • the parameters of the corresponding CS hopping scheme are used to generate the RS, and no additional processing is performed on the group hopping and/or sequence hopping.
  • the parameters of the CS hopping scheme sent by the network side device to the UE include the following, but Not limited to this:
  • the CS hopping information sent by the network side device to the UE includes a CS hopping sequence initialization value that is generated by the UE to generate an RS;
  • the CS hopping value CS3 (n_s) corresponding to the UE generating the RS is performed by one
  • the UE may determine the sequence according to the initialization value c_init of the sequence, thereby determining the CS hopping value of different time slots; therefore, when the network side device sets the same sequence for the UEs of different cells
  • the initialization value enables them to use the same CS hopping scheme; therefore, the network side device directly sends the CS hopping sequence initialization value to the UE, and the UE can directly initialize the CS hop according to the value.
  • the initialization value is c Y : • 2 5 + ,
  • L* represents the rounding down operation
  • Cell_ID represents the cell ID
  • the value range is (T503
  • / ss represents the offset value of the CS hopping sequence initialization
  • its value range is (29.
  • the parameter of the CS hopping scheme sent by the network side device to the UE includes an CS hopping sequence initialization offset value of the RS generated by the UE;
  • the UE may also be sent to the UE.
  • the offset value of the CS hopping sequence is initialized; since the offset value has a small value range, transmitting the offset value can effectively reduce the signaling overhead, for example, only 5 bits can be used to transmit all the offset values; When neighboring cells correspond
  • the network side device sets the same sequence for the UEs of different cells.
  • the offset value of the column initialization value f ss can also enable the UEs of different cells to finally calculate the same CS sequence initialization value, thereby ensuring that different UEs use the same CS hopping scheme.
  • the network side device may further send different 0CC (Orthogonal Cover Code) to the UE, so that the UE is loaded into the same one by using the 0CC.
  • the two RSs in the TTI can further ensure the orthogonality of the RSs sent by the UE.
  • the network side device allocates a partially overlapping PRB (Physical Resource Block) for different UEs in the same cell, For example, in the LTE-A system, one PRB includes 12 subcarriers on the frequency), and the same CS hopping scheme is used and the group is closed as long as the different UEs are loaded into two RSs on the same TTI using different 0CCs.
  • PRB Physical Resource Block
  • the RSs that are sent are orthogonal, that is, there is no interference between them; for example, if the network side device allocates PRB wide 3 for UE1 and PRB wide 5 for UE2, Although the signals transmitted by the two UEs occupy the PRB wide 3, only need to allocate 0CC [+1 +1] for UE1 and 0CC [+1 -1] for UE2, that is, the two UEs are allocated. Different 0CCs, so that the RSs sent by the two UEs are orthogonal to each other.
  • the network side device can distinguish the RSs sent by the two UEs when receiving the signals sent by the two UEs, so that the more accurate channel information corresponding to the two UEs can be separately obtained, and the data of the two UEs are respectively solved. Tune. [50] It should be noted that the same CS hopping scheme indicates that the change values of CS used by different RSs in one TTI are the same.
  • the change value of CS is the change value of the CS value used by the second RS and the CS value used by the first RS; for example, for the same TTI, if UE1 is in 2 RSs
  • the CS values used on the two are respectively 3 and 9, and the CS values used by UE2 on the two RSs are 4 and 10, respectively, and the changes in CS used by the two UEs on the two RSs in the UI are 6, so they use the same CS hopping scheme.
  • Step 120 The UE receives the CS hopping information sent by the network side device, where the CS hopping information is used to indicate that the UE turns off the group hopping and/or the sequence hopping, and instructs the UE to generate the reference signal RS.
  • a CS hopping scheme used; turning off group hopping and/or sequence hopping according to the CS hopping information, and generating an RS using the CS hopping scheme indicated by the CS hopping information, and transmitting the RS to the network Side equipment
  • the UE turns off group hopping and/or sequence hopping in the following manner, but is not limited thereto:
  • [53] 1) after the UE receives the CS hopping information sent by the network side device, setting the value of the group hopping and/or the sequence hopping to a preset fixed value in the corresponding ;; for example, Take group hop as an example: [54]
  • the value of u is the same for all RSs, that is, the RSs of different time slots use the same base sequence group; for sequence hopping, if the UE receives the CS hopping information from the network side device, it is in the corresponding TTI.
  • Step 130 The network side device acquires the RS sent by the UE, estimates the wireless channel fading according to the RS, and demodulates the data information according to the wireless channel fading estimation value.
  • the RSs sent by the multiple UEs received by the network side device are mutually orthogonal, that is, there is no interference between RSs transmitted by different UEs, thereby improving the accuracy of the estimation of the wireless channel fading, thereby improving the data solution.
  • the network side device receives the RS sent by different UEs, the default is the RS that is sent after the UE turns off the group hopping and/or sequence hopping.
  • the UE when generating the RS, the UE first needs to determine the base sequence; wherein, when the group hopping or the sequence hopping is enabled, the RSs of different time slots use different base sequence groups or base sequence subgroups. The same base sequence group or base sequence subgroup is used when the group hopping or sequence hopping is closed; then the UE determines the same TTI from the base sequence group or the base sequence subgroup according to the bandwidth allocated by the network side device to the UE. The base sequence used by the RSs of the two slots.
  • the network side device sends signaling to the UE to indicate that the UE turns off the group hopping and/or sequence hopping, (the group hop becomes an example, the sequence hopping is similar, and details are not described below), and the UE is preset according to the preset
  • the UEs of different cells use different base sequence groups. Therefore, when the group hopping or sequence hopping is closed, the UEs of different cells use the same CS hopping scheme to generate the RS. Therefore, the uplink RSs sent by the different UEs may be orthogonal to each other without interference between each other.
  • the CS hopping information is sent to the UE by using the network side device, so that different UEs use the same CS hopping scheme to generate the RS and turn off the group hopping and/or sequence hopping.
  • the uplink RSs sent by different UEs are orthogonal to each other to improve data demodulation performance.
  • different UEs can still obtain the benefits of interference randomization technology when there is no need to transmit orthogonal RSs.
  • Enable CoMP technology to be applied to the system to improve performance while still maintaining the benefits of interference with randomization technology.
  • another embodiment of the present invention further provides a network side device for implementing data demodulation.
  • the network side device 200 includes a sending unit 210 and a demodulating unit 220.
  • the sending unit 210 is configured to send the same CS hopping information to the UE, where the CS hopping information is used to indicate that the UE turns off the group hopping and/or sequence hopping, and instructs the UE to generate the CS used by the RS. Hopping scheme
  • the demodulation unit 220 is configured to receive the RS sent by the UE, and estimate a radio channel fading according to the RS, and then demodulate the data information according to the radio channel fading estimation value.
  • the sending unit indicates that the UE turns off the group hopping and/or sequence by: the CS hopping information sent by the sending unit 210 includes a group hopping and/or sequence hopping indication, Instructed by The UE closes the group hopping and/or the sequence hopping; or, the preset CS hopping information has a binding relationship with the closed group hopping and/or sequence hopping operation, and the sending unit 210 The UE sends CS hopping information to instruct the UE to turn off group hopping and/or sequence hopping.
  • the sending unit 210 may further include (not shown in the figure): a bearer module and an identity module, where the bearer module is configured to carry the CS hopping information in scheduling information;
  • the identifier module is configured to add a TTI identifier for indicating off group hopping and/or sequence hopping in the scheduling information, so that the UE turns off group hopping and/or sequence hopping in the TTI.
  • the sending unit 210 may further include (not shown): a first signaling module and a second signaling module; wherein the first signaling module is used to pass a semi-static Transmitting, to the UE, at least one set of CS hopping scheme parameters; the second signaling module, configured to send, by using dynamic signaling, to the UE whether to use one of the multiple sets of CS hopping scheme parameters to generate An indication of the RS and an indication of whether to turn off group hopping and/or sequence hopping.
  • the CS hopping scheme parameter included in the CS hopping information sent by the sending unit 210 further includes a CS hopping sequence initialization value or a CS hopping sequence initialization offset value indicating that the UE generates an RS.
  • the sending unit 210 may further include (not shown): send a processing module of different 0CC to the UE.
  • the apparatus 300 includes: a receiving unit 310 and a reporting unit 320;
  • the receiving unit 310 is configured to receive the CS hopping information sent by the network side device, where the CS hopping information is used to indicate that the UE turns off the group hopping and/or the sequence hopping, and instructs the UE to generate the reference signal RS.
  • the reporting unit 320 is configured to disable group hopping and/or sequence hopping according to the CS hopping information, and generate the RS by using the CS hopping scheme, and then send the packet to the network side device.
  • the receiving unit 310 may further include: (not shown in the figure): a first receiving module and a first extracting module; wherein, the first receiving module is configured to receive scheduling information sent by the network side; The first extracting module is configured to acquire the CS hopping information and the TTI identifier of the group hopping and/or sequence hopping according to the scheduling information, and close the group hopping in the TTI according to the TTI identifier. / or sequence jumps.
  • the reporting unit 320 may further include (not shown): the first setting module and the second setting
  • the first setting module is configured to: when the receiving unit 310 receives the CS hopping information sent by the network side device, set the value of the group hopping and/or the sequence hopping in the corresponding TTI to a preset fixed value
  • the second setting module is configured to: when the receiving unit 310 receives the CS hopping information sent by the network side device, perform group hopping and/or sequence hopping of all RSs in the corresponding TTI.
  • the changed value is set to the group hopping or sequence hopping value used by any of the RSs when the group hopping and/or sequence hopping is turned on.
  • the receiving unit 310 is further configured to receive semi-static signaling and dynamic signaling that are sent by the network side device by using a unicast device.
  • the reporting unit 320 may further include (not shown): a second extraction module and a generation module; wherein the second extraction module is configured to extract the CS hopping scheme from the semi-static signaling received by the receiving unit;
  • the indication of the command determines whether the group hopping and/or sequence hopping is turned off, or generates an RS according to the CS hopping scheme number included in the dynamic signaling and turns off the group hopping and/or sequence hopping.
  • the apparatus 300 may further include (not shown): a loading unit for receiving the 0CC transmitted by the network side and loading the 0CC to different RSs in the same TTI.

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

Abstract

Selon un mode de réalisation, la présente invention concerne un dispositif, un système et un procédé de démodulation de données. Le procédé comprend les étapes consistant à : transmettre les mêmes informations de saut de décalage cyclique (CS) à un équipement d'utilisateur (UE), les informations de saut CS servant à ordonner à l'UE de fermer un saut de groupe et/ou un saut de séquence et à donner l'instruction à l'UE de générer une solution de saut CS utilisée par un signal de référence (RS); recevoir le RS transmis par l'UE, estimer l'évanouissement de canal sans fil conformément au RS, et démoduler des informations de données selon la valeur estimée de l'évanouissement de canal sans fil. Le procédé, le dispositif et le système dans le mode de réalisation de la présente invention permettent aux RS de liaison montante transmis par différents UE d'être orthogonaux les par rapport aux autres, et peuvent en outre améliorer les performances de démodulation de données.
PCT/CN2013/072833 2012-03-19 2013-03-19 Système, dispositif et procédé de démodulation de données Ceased WO2013139248A1 (fr)

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