WO2014019517A1 - Procédé de transmission de signal de référence, équipement d'utilisateur et dispositif côté réseau - Google Patents

Procédé de transmission de signal de référence, équipement d'utilisateur et dispositif côté réseau Download PDF

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Publication number
WO2014019517A1
WO2014019517A1 PCT/CN2013/080533 CN2013080533W WO2014019517A1 WO 2014019517 A1 WO2014019517 A1 WO 2014019517A1 CN 2013080533 W CN2013080533 W CN 2013080533W WO 2014019517 A1 WO2014019517 A1 WO 2014019517A1
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WIPO (PCT)
Prior art keywords
reference signal
resource
configuration information
signal resource
resource unit
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PCT/CN2013/080533
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English (en)
Chinese (zh)
Inventor
周明宇
马泽瑞瑟·大卫
任晓涛
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华为技术有限公司
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Publication of WO2014019517A1 publication Critical patent/WO2014019517A1/fr

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    • 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
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • the present invention relates to the field of communications, and more particularly to a method of transmitting a reference signal, a user equipment, and a network side device. Background of the invention
  • the network side device sends a reference signal (Reference Signal, RS) for measuring downlink channel state information (CSI) to the user equipment (User Equipment, UE), and the UE obtains the downlink by measuring the RS.
  • CSI downlink channel state information
  • the content that the UE feeds back to the network side device may include, for example, Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Channel Quality Indicator (CQI), and precoding. Precoding Matrix Indicator (PMI), Rank Indicator (RI), and the like.
  • RSRP Reference Signal Received Power
  • RSRQ Reference Signal Received Quality
  • CQI Channel Quality Indicator
  • PMI Precoding Matrix Indicator
  • RI Rank Indicator
  • the network side device can schedule downlink transmission according to the information fed back by the UE, for example, scheduling transmission of a Physical Downlink Shared Channel (PDSCH).
  • PDSCH Physical Downlink Shared Channel
  • the network side device usually sends configuration information of an RS resource to the UE, and can obtain downlink CSI from the UE through the configuration information.
  • the network side device may send configuration information of the RS resource corresponding to the 2 antenna port to the UE, and the UE may receive the RS sent by the network side device from the corresponding 2 antenna port according to the configuration information.
  • the network side device can only configure one RS resource for the UE, it can only obtain the RS.
  • the CSI corresponding to the resource for example, the RS resource configured by the network side device for the UE includes only the RS corresponding to the 2 antenna port, and the network side device can only obtain the CSI corresponding to the 2 antenna port.
  • the actual channel environment is more suitable for transmission of the 4-antenna port.
  • the embodiments of the present invention provide a method for transmitting a reference signal, a user equipment, and a network side device, which can flexibly configure RS resources, so that the RS can be properly transmitted.
  • a method for transmitting a reference signal including: determining at least two reference signal resources, where each of the reference signal resources includes at least one resource unit, and each of the reference signal resources corresponds to a first configuration information, One of the at least two reference signal resources and the at least one second reference signal resource have an overlapping relationship in at least one first time interval; determining the first reference signal in the at least one first time interval First configuration information corresponding to each resource unit in the resource; in the at least one first time interval, according to the first configuration information corresponding to each resource unit in the first reference signal resource, in each of the first reference signal resources A reference signal is sent to the user equipment UE on the resource unit.
  • a method for transmitting a reference signal including: determining at least two reference signal resources, wherein each of the reference signal resources includes at least one resource unit, and each of the reference signal resources corresponds to a first configuration information. And determining, by the first reference signal resource, the at least one second reference signal resource and the at least one second reference signal resource have an overlapping relationship in at least one first time interval; determining the first reference in the at least one first time interval First configuration information corresponding to each resource unit in the signal resource; in the at least one first time interval, according to the first configuration information corresponding to each resource unit in the first reference signal resource, in each of the first reference signal resources The reference signal is received from the network side device on the resource unit.
  • a network side device for transmitting a reference signal including: a determining module, For determining at least two reference signal resources, where each of the reference signal resources includes at least one resource unit, each of the reference signal resources corresponding to a first configuration information, and a first reference of the at least two reference signal resources The signal resource and the at least one second reference signal resource have an overlapping relationship in at least one first time interval, and determine first configuration information corresponding to each of the first reference signal resources in the at least one first time interval And a sending module, configured to send, to the user equipment UE, each resource unit of the first reference signal resource according to the first configuration information corresponding to each resource unit in the first reference signal resource in the at least one first time interval Send a reference signal.
  • a user equipment for transmitting a reference signal including: a determining module, configured to determine at least two reference signal resources, where each of the reference signal resources includes at least one resource unit, and each of the reference signal resources Corresponding to a first configuration information, one of the at least two reference signal resources and the at least one second reference signal resource have an overlapping relationship in at least one first time interval, and are determined to be at least one of the foregoing a first configuration information corresponding to each resource unit in the first reference signal resource in a time interval; a receiving module, configured to: according to the first corresponding to each resource unit in the first reference signal resource, in the at least one first time interval And a configuration information, the reference signal is received from the network side device on each resource unit of the first reference signal resource.
  • the technical solution can send a reference signal to the user equipment on the overlapping resource unit according to the configuration information of the at least two reference signal resources. Since the network side device can provide multiple reference signal resources for the UE, the reference signal can be flexibly configured. Resources so that the reference signal can be transmitted appropriately. In addition, due to the overlap of some resource units, the overhead required to transmit the reference signal (Overhead) is saved. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a schematic flow chart of a method of transmitting a reference signal according to an embodiment of the present invention.
  • 2A through 2F are diagrams showing RS resources according to an embodiment of the present invention.
  • FIG. 3 is a schematic flow chart of a method of transmitting a reference signal according to an embodiment of the present invention.
  • 4 is a schematic diagram of a process of transmitting a reference signal in accordance with one embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a process of transmitting a reference signal according to another embodiment of the present invention.
  • FIG. 6 is a structural schematic diagram of a network side device according to an embodiment of the present invention.
  • Figure ⁇ is a structural schematic diagram of a user equipment in accordance with an embodiment of the present invention.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced Long Term Evolution
  • UMTS Universal Mobile Telecommunication System
  • the embodiment of the present invention will be described by taking an LTE network as an example.
  • Embodiments of the present invention can be used in wireless networks of different standards.
  • a wireless access network may include different network elements in different systems.
  • the network elements of the radio access network in LTE (Long Term Evolution) and LTE-A (Long Term Evolution-Advanced) include eNB (eNodeB, evolved base station), WCDMA (Wideband Code) Division Multiple Access, Wideband Code Division Multiple Access)
  • the network elements of the radio access network include RNC (Radio Network Controller) and NodeB.
  • WiMax Worldwide Interoperability for Microwave Access
  • Other embodiments of the present invention may also use a solution similar to the embodiment of the present invention, but the related modules in the base station system may be different.
  • the embodiments of the present invention are not limited, but for convenience of description, the following embodiments will use network-side devices. Give an example for explanation.
  • the user equipment includes but is not limited to a mobile station (MS, Mobile Station), a mobile terminal (Mobile Terminal), a mobile telephone (Mobile Telephone), a mobile phone (handset). And portable equipment, etc., the user equipment can communicate with one or more core networks via a Radio Access Network (RAN), for example, the user equipment can be a mobile phone (or "cellular") Telephone), a computer with wireless communication function, etc., and the user equipment can also be a portable, pocket-sized, handheld, computer-integrated or in-vehicle mobile device.
  • RAN Radio Access Network
  • a Transmission Time Interval is 1 ms, including 14 symbols.
  • the LTE system bandwidth includes several Physical Resource Blocks (PRBs), and the bandwidth of one PRB includes 12 subcarriers.
  • PRBs Physical Resource Blocks
  • a PRB contains multiple resource elements (Resources, REs).
  • One RE occupies one subcarrier in the frequency domain and occupies one symbol length in the time domain.
  • the network side device may send the RS in each PRB. After receiving the RS, the UE may obtain the downlink CSI information by measuring the received RS, and feed back the obtained downlink CSI information to the network side device.
  • the network side device may send the RE information corresponding to the RS resource to the UE, and the UE may receive the RS from the corresponding RE according to the RE information, where each RS resource may include one or more used to send the RS.
  • RE may be sent signaling to the UE to notify at least one RE (k, t) corresponding to one RS resource in one PRB, where RE (k, t) represents the RE information, and k represents a PRB.
  • the number of the subcarrier in the frequency dimension, t represents the number of the symbol in the time dimension of a TTI.
  • the UE may determine all the REs corresponding to the RS, and receive the RSs on the REs to obtain the downlink CSI, and feed back to the network side device, so that the network side device can learn the downlink CSI for downlink transmission. Dispatch.
  • this method lacks flexibility. That is, the network side device can only configure one RS resource for the UE in one PRB. The network side device can only obtain the CSI corresponding to the RS resource, and cannot obtain more information.
  • a group of RSs may refer to RSs sent on one or more REs corresponding to one RS resource, for example, the same signaling by the base station (for example, the same signaling for transmitting configuration information) And the same signaling used to transmit the RE information) RS indicated to the UE.
  • the set of RSs may be transmitted by the network side device one or more times.
  • the network side device sends a set of signaling to the UE, including configuration information of an RS (hereinafter referred to as an RS) corresponding to an antenna port, and the UE may determine, according to the configuration information, all REs corresponding to the RS sent by the network side device. .
  • FIG. 1 is a method of transmitting an RS according to an embodiment of the present invention.
  • the method of Figure 1 is performed by a network side device.
  • 2A through 2F are schematic diagrams of RS resources in accordance with an embodiment of the present invention.
  • the method of Fig. 1 will be described below with reference to Figs. 2A to 2F.
  • the method of Figure 1 includes the following.
  • each of the reference signal resources includes at least one resource unit, each of the reference signal resources corresponding to a first configuration information, and a first reference of the at least two reference signal resources
  • the signal resource has an overlapping relationship with the at least one second reference signal resource for at least one first time interval.
  • the reference signal is sent to the user equipment UE on each resource unit of the first reference signal resource according to the first configuration information corresponding to each resource unit in the first reference signal resource in the at least one first time interval.
  • the network side device may configure multiple RS resources for the UE, for example, one RS resource is used for 2 antenna port transmission, and another RS resource is used for 4 antenna port transmission, so that the UE can measure these RS resources.
  • the transmitted RS acquires downlink channel information (for example, CSI) in various cases.
  • “first” and “second” refer to any one of at least two reference signal resources, just for distinguishing, and do not represent the number of RS resources, wherein each RS resource may include one or more REs.
  • the network side device may determine, according to the RE information of the at least two RS resources and the second configuration information corresponding to the RS resources, the REs of the at least two reference signal resources.
  • the network side device may send the RE information of the at least two RS resources and the second configuration information corresponding to the RS resources to the UE.
  • the network side device may send the RE information of the first RS resource and the second configuration information thereof to the UE.
  • the first configuration information, and the RE information of the second RS resource and the second configuration information and the first configuration information are sent to the UE.
  • the network side device can follow the first The first configuration information of the RS resource, the RS is sent on the RE corresponding to the RE information and the second configuration information of the first RS resource, and the RE of the second RS resource is used according to the first configuration information of the second RS resource.
  • the RS is transmitted on the RE corresponding to the information and the second configuration information.
  • the embodiment according to the present invention is not limited thereto, for example, in the case where the RE information and the first configuration information are previously set in the UE, it is not necessary to transmit the RE information and the first configuration information to the UE.
  • the at least two reference signal resources have an overlapping relationship in the at least one first time interval, and the at least two RS resources may be in accordance with the first configuration information of one of the at least two RS resources according to the embodiment of the present invention.
  • the presence of overlapping parts of the RE is sent on the RS.
  • the second configuration information may be used to determine the RE of the RS resource in association with the RE information.
  • the second configuration information may be antenna port information.
  • the first configuration information may be a parameter for transmitting the RS.
  • the first configuration information may be at least one of configuration information such as power information, sequence information, and time information.
  • the second configuration information, the first configuration information, and the RE information may be sent by using the dedicated signaling, or may be carried in the existing signaling, which is not limited by the embodiment of the present invention.
  • the above overlap may mean that there is an overlap at the same time-frequency resource location within the same TTI.
  • the at least one first time interval may be a periodic time interval, or may be a preset non-periodic time interval.
  • the network side device can be implemented as a base station (BS), an access point (AP), a remote radio equipment (RRE), a remote radio head (RRH), and a remote end.
  • BS base station
  • AP access point
  • RRE remote radio equipment
  • RRH remote radio head
  • RRU Remote Radio Unit
  • relay node etc.
  • the RS may be sent to the user equipment UE on the RE according to the configuration information of the at least two RS resources. Since the network side device can configure multiple RS resources for the UE, the RS resource can be flexibly configured. The RS is transmitted appropriately. For example, the network side device can flexibly configure multiple RS resources for the UE, and obtain CSI corresponding to, for example, 2 antenna ports and 4 antenna ports by using multiple CSIs reported by the UE, and finally can flexibly select 2 antenna ports or 4 antenna ports. Send a signal to the UE. In addition, since some of the REs overlap, the overhead required to transmit the RS is saved.
  • the network side device may send the second configuration information of the at least two RS resources to the UE.
  • the first configuration information and the RE information may be preset in the UE.
  • the network The side device may send the second configuration information and the first configuration information of the at least two RS resources to the UE.
  • the RE information can be set in advance in the UE.
  • the network side device may send the second configuration information of the at least two RS resources to the UE, and for the at least two RS resources.
  • the different RS resources send different types of first configuration information to the UE.
  • the network side device may only send the antenna port information to the UE, and for the second RS resource, the network side device may send the antenna port information and the sequence information to the UE.
  • the advantage of this is backward compatibility: Since the conventional network side device only configures one RS resource for the UE, usually some configuration information (for example, sequence information) of the RS resource is preset, for example, due to the RS resource.
  • the sequence information sent on the uplink (for example, the initialization value of the sequence) is a cell ID (Cell ID), and therefore, the sequence information does not need to be retransmitted for the RS resource.
  • the sequence information may not be transmitted for the first RS resource according to an embodiment of the present invention, and configuration information such as sequence information may only be transmitted for the newly added RS resource.
  • the first RS resource for the first RS resource, only the second configuration information of the first RS resource is sent to the UE, and the second configuration of the at least one second RS resource is sent to the UE.
  • Information and first configuration information are optionally sent to the UE.
  • the network side device does not send configuration information other than the second configuration information (for example, antenna port information) corresponding to the RS resource.
  • the network side device may send configuration information other than the antenna port to the UE, but the UE does not use configuration information other than the antenna port information.
  • FIG. 2A to FIG. 2C respectively show REs corresponding to three RS resources for transmitting an RS.
  • the network side device may configure three RS resources for the UE, and respectively send the first RS. 2, 3 groups of RSs, which are nested with each other, and a group of RSs are RSs transmitted on one or more REs corresponding to one RS resource, where RS resources corresponding to the first group RS and RSs corresponding to the second group RS
  • the resources use RE (9, 5) and (9, 6), and the RS resources corresponding to the first group RS and the RS resources corresponding to the third group RS use RE (3, 5) and (3, 6).
  • the network side device can transmit the RS on the RE (9, 5) and (9, 6) according to the configuration information (for example, power information) of the RS resource corresponding to the second group RS (for example, using a specific data signal) 6 dB high power transmission), according to the configuration information of the RS resources corresponding to the third group RS, in RE (3, 5) and (3, 6)
  • the RS is transmitted (eg, using a power transmission that is 3 dB higher than the data signal).
  • the UE receives the RS on the RE, and the specific process is not described here.
  • the configuration information other than the antenna port information of the RS resource corresponding to the first group RS does not function, in which case the network side device may not transmit the configuration other than the antenna port information to the UE. information.
  • the network side device may also send the configuration information, but the UE ignores the configuration information, that is, the configuration information is not used after receiving the configuration information.
  • the network side device sends one RE information to the UE for each RS resource, so that the UE receives the corresponding N pieces of RE information and N pieces of configuration information (for example, second configuration information) of the N RS resources, and according to the ith
  • the first RS resource may be configured to use the RE corresponding to the first group RS in Fig. 2A
  • the second RS resource uses the RE corresponding to the second group RS of Fig. 2B.
  • the first RS resource may be configured to use the RE corresponding to the first group RS of FIG. 2A
  • the second RS resource uses the RE corresponding to the third group RS of FIG. 2C.
  • the RE information of the at least two RS resources is the same, where, in 110, determining according to the same RE information and the second configuration information of each of the at least two RS resources.
  • the network side device may send one RE information to the UE for multiple (or all) RS resources.
  • the UE may receive one common RE information of the N RS resources and corresponding N configuration information (for example, second configuration information), and determine the i th RS resource according to the RE information and the i th configuration information.
  • N configuration information for example, second configuration information
  • Table 1 gives an example of all RS resources preset in the network side device and the UE side.
  • the network side device may only transmit the RE information (the RS configuration number, that is, the number of the RS resource) and the antenna port information (for example, the number of the antenna ports) to the UE,
  • the UE may determine the RE corresponding to the RS resource according to the RE information and the antenna port information.
  • (k, t ) shown in Table 1 represents an RE of the RS resource with the largest number of k and the smallest number of t (for example, the RE in the uppermost left corner of FIGS. 2A to 2C), and a value in Table 1 may be
  • an RE with an RS configuration number of 0 and an RS antenna port number of 1 or 2 is as shown in FIG. 2B
  • an RS with an RS configuration number of 0 and an RS antenna port number of 4 is as shown in FIG. 2A.
  • the RE with the RS configuration number of 10 and the number of RS antenna ports is 1 or 2 is shown in Figure 2C.
  • the RE with RS configuration number 0 and RS antenna port number 8 is shown in Figure 2D.
  • the network side device may send the RE information of the two RS resources and the second configuration information of each of the RS resources to the UE, where the RE information of the two RS resources indicates that the RS configuration number is 0;
  • the second configuration information of the resource indicates that the RS resource corresponding to the first group RS includes a 4-antenna port.
  • transmitting the RS by using a power higher than the data signal by 3 dB;
  • the second configuration information of the RS resource corresponding to the second group of RSs indicates that the RS resource corresponding to the second group of RSs includes the 2 antenna ports, and uses a power higher than the data signal by OdB ( That is, the transmission power is the same as the data signal) and the RS is transmitted.
  • the UE determines, according to the foregoing preset, that the REs of the RS resources corresponding to the first group of RSs include (9, 5), (9, 6), (3, 5), and (3, 6), and the second group of RSs corresponds to
  • the RE of the RS resource includes (9, 5) and (9, 6), that is, the RS resource corresponding to the first group of RSs includes the RS resources corresponding to the second group of RSs. Therefore, the non-overlapping REs include (3, 5) and (3, 6), and the overlapping REs include (9, 5) and (9, 6).
  • the network side device can send the non-overlapping two REs according to the first configuration information of the RS resources corresponding to the first group of RSs, that is, using the power higher than the data signal by 3 dB in RE (3, 5) and (3, 6) transmitting the RS; transmitting the two REs according to the first configuration information of the RS resources corresponding to the second group RS, that is, sending the RS on the RE (9, 5) and (9, 6) with the same power as the data signal .
  • the RS is sent to the UE on the RE.
  • different REs for transmitting a group of RSs correspond to different network side devices, or different network side devices transmit RSs on different REs for transmitting a group of RSs, for example, for the first RS resources, different The network side device transmits the RS on the non-overlapping RE and the overlapping RE, respectively.
  • the RS resource corresponding to the first group RS includes the RS resources corresponding to the second group RS, and the overlapping REs of the two groups of RS resources are (9, 5) and (9, 6), and the non-overlapping RE is (3, 5) and (3, 6).
  • the second configuration information includes antenna port information
  • the first configuration information includes at least one of power information, sequence information, and time information.
  • the network side device can control the power of the RS. For example, the transmission power of the RS can be increased, so that the signal quality of the UE receiving the RS is better, and the estimated CSI is more accurate. However, the network side device needs to notify the UE of the power information by signaling, so that the CSI fed back by the UE conforms to the power of the data signal.
  • the second configuration information and the first configuration information of the at least two RS resources may be received from the network side device before receiving the reference signal from the network side device.
  • the second configuration information of the at least two RS resources may be received from the network side device, and different for the at least two RS resources.
  • the RS resource receives different types of first configuration information from the network side device.
  • the RE information of the at least two RS resources is the same
  • the method of FIG. 3 further includes: receiving the same RE information from the network side device, where at 310, Determrating an RE corresponding to second configuration information of each of the at least two RS resources according to the same RE information and the second configuration information of each of the at least two RS resources.
  • the first RS resource comprises all REs of at least one second RS resource
  • the first configuration information of each RE may be determined according to the number of times that each of the overlapping REs is included by the at least two RS resources, including the RE that does not determine the first configuration information.
  • the first configuration information of the least number of RS resources is determined as the first configuration information of the RE of the undetermined first configuration information.
  • the first configuration information of the first reference signal resource may be determined as a resource unit that does not overlap between the first reference signal resource and the at least one second reference signal resource. First configuration information; and determining, by the first configuration information of one of the at least one second reference signal resource, that there is an overlapping resource unit between the first reference signal resource and the at least one second reference signal resource A configuration message.
  • the second configuration information includes antenna port information
  • the first configuration information includes at least one of power information, sequence information, and time information.
  • FIG. 4 is a schematic diagram of a process of transmitting an RS in accordance with one embodiment of the present invention.
  • the RS may be sent to the UE by using the multiple RS resources by the network side device, and the UE obtains various hypotheses by measuring the RS sent on the multiple RS resources (for example, 2 antenna port hypothesis and 4 antennas) The CSI corresponding to the port hypothesis).
  • a plurality of RS resources including 2 antenna port transmission corresponding RS resources and 4 antenna port transmission corresponding RS resources are taken as an example, and are described with reference to FIGS. 2A to 2E.
  • the network side device determines an RE used to send the RS.
  • the RE of the second RS resource (corresponding to the 2 antenna port) includes (9, 5) and (9, 6).
  • the RE (9, 5), (9, 6) of the first RS resource overlaps with the RE (9, 5) and (9, 6) of the second RS resource, as shown in FIG. 2A and FIG. 2B.
  • the method of determining the RE is not limited, and for example, it can be randomly selected from a plurality of sets of available REs.
  • the network side device sends the RE information and the configuration information to the UE.
  • the UE determines an RE for receiving the RS.
  • the network side device and the UE both pre-set a plurality of REs (k, f) and determine other REs by using a certain RE, so that the network side device determines and sends an RE number to the UE, and the UE can learn the network.
  • the (k,f) information of the RE indicated by the side device for example, the number of the RE (9, 5) is set to 0, and the number of the RE (3, 5) is 10, the network side device only needs to number the RE. 0 is sent to the UE, and the UE can learn that one RE of the RE corresponding to the RS indicated by the network side device is RE (9, 5), and then determines the manner of other REs by using a certain RE according to a preset manner, and passes the RE.
  • the network side device instructs the UE to receive the RS on the RE (9, 5) and (9, 6) for acquiring the CSI.
  • the network side device may also follow the configuration information (for example, time information, power information, and sequence information) corresponding to the 2 antenna ports through the antenna ports 0 and 1 on the REs (9, 5) and (9, 6). Sending an RS to the UE, meanwhile, the UE can pass the antenna ports 0 and 1 at the RE (9,
  • RE ( 9, 5 ) and (9, 6) receive RS, where different antenna ports can use different RE and / or orthogonal codes. Since RE ( 9, 5 ) and ( 9, 6 ) are REs whose two RS resources overlap, RE ( 9, 5 ) and (9, 6) can be used for both the first RS resource and the first. 2 RS resources.
  • the UE may obtain the RS transmitted on the first RS resource and the second RS resource. Take the CSI in both cases. For example, the UE may acquire CSI corresponding to antenna ports 0 and 1 by measuring the RS received on the second RS resource. The UE may acquire the CSI corresponding to the antenna ports 0 to 3 by measuring the RS received on the first RS resource.
  • the UE feeds back, to the network side device, a CSI corresponding to the 4 antenna port.
  • the total number of REs required to transmit the RS to the UE is smaller than the sum of the RE numbers corresponding to all the RS resources.
  • the network side device in one PRB, only needs to send 4 REs to the UE, and the UE can measure the CSI corresponding to the 2 antenna ports based on the assumption of the 2 antenna port, and can be based on the 4 antennas.
  • the port hypothesis measures the CSI corresponding to the 4-antenna port without 6 REs, saving the overhead of RS.
  • 440 and 450 of Fig. 4 may be performed by two network side devices, respectively.
  • the first network side device transmits an RS to the UE on the overlapping RE
  • the second network side device transmits the RS to the UE on the non-overlapping RE.
  • Figure 5 is a schematic diagram of a transmission RS procedure in accordance with another embodiment of the present invention.
  • CoMP technology has been proposed. Different from the traditional communication system, one UE is only served by one network side device. In a system to which CoMP technology is applied, one UE can be served by multiple network side devices, for example, the first network side device and the second network side device. Sending a signal to the UE, where the sending work of the two network side devices
  • the rates may be the same or different, that is, corresponding to a homogeneous network and a heterogeneous network (Heterogeneous Network).
  • the system for example, a central controller for controlling multiple network side devices or a certain primary network side device
  • the CSI corresponding to the network side device.
  • a central controller (not shown) or a certain primary network side device (e.g., one of the multiple network side devices) controls a plurality of network side devices to simultaneously transmit downlink signals to the UE.
  • An embodiment of the present invention is described by taking an example in which a plurality of RS resources include an RS resource corresponding to the first network side device and an RS resource corresponding to the second network side device.
  • the RE used by the first network side device to transmit the RS and the RE used by the second network side device to send the RS may overlap at the same time frequency resource position in different frames.
  • the first network side device determines an RE for sending the RS.
  • the central controller of the first network side device or the primary network side device of the CoMP learns the RE for transmitting the RS, and may also select the RE for transmitting the RS according to a preset (or configuration).
  • the method for determining the RS is similar to that of FIG. 4, and details are not described herein again.
  • the second network side device determines an RE for sending the RS. Similar to the method of 410 of FIG. 4, it will not be described here.
  • the first network side device sends, to the UE, RE information and configuration information of the RS resource corresponding to the first network side device. Similar to the method of 420 of FIG. 4, details are not described herein again.
  • the second network side device sends, to the UE, RE information and configuration information of the RS resource corresponding to the second network side device. Similar to the method of 420 of FIG. 4, details are not described herein again.
  • the UE determines an RE for receiving the RS.
  • the UE may determine an RE for receiving the RS based on the RE information and the configuration information.
  • the manner of sending the RE information and the configuration information is not limited.
  • the first network side device may send the RE information and the configuration information of the second network side device to the UE or send the first information to the UE by the central control node.
  • RE information and configuration information of a network side device and a second network side device may be sent to the UE or send the first information to the UE by the central control node.
  • the first network side device sends an RS to the UE.
  • the second network side device sends an RS to the UE.
  • the second network side device may be configured according to configuration information (eg, time information, power information, and sequence information) corresponding to the second network side device.
  • configuration information eg, time information, power information, and sequence information
  • the system controls the second network side device at the RE (3, 5) and (3, 6) send the RS to the UE, and at the same time, the UE can receive the RS on RE (3, 5) and (3, 6).
  • the UE can obtain the CSI in both cases by measuring the RSs transmitted on the first RS resource and the second RS resource. Specifically, the UE can obtain the joint channel information corresponding to the first network side device and the second network side device by measuring the RS on the first RS resource, and then feed back to the network side device; by measuring the second RS resource. The RS can obtain channel information corresponding only to the first network side device, and feed back to the network side device.
  • the network side device can reasonably schedule the first network side device to send a downlink signal to the UE according to the CSI corresponding to the first network side device or the joint CSI corresponding to the first network side device and the second network side device, or The scheduling of the first network side device and the second network side device jointly sends a downlink signal to the UE.
  • the UE sends the CSI to the first network side device.
  • the UE may feed back to the first network side device CSI information such as RSRP, RSRQ, CQL PMI, RI, etc. corresponding to the first network side device.
  • the UE may feed the PMI corresponding to the first network side device to the first network side device, so that the first network side device determines, according to the fed PMI, the PMI used by the first network side device to transmit the downlink signal to the UE.
  • the UE sends the CSI to the second network side device.
  • the UE may feed back to the second network side device CSI information such as RSRP, RSRQ, CQL PMI, RI, etc. corresponding to the second network side device.
  • the UE may feed the PMI corresponding to the second network side device to the second network side device, so that the second network side device determines, according to the fed PMI, the PMI used by the second network side device to transmit the downlink signal to the UE.
  • the UE may feed back all CSIs to one of the first network side device and the second network side device.
  • FIG. 6 is a structural schematic diagram of a network side device according to an embodiment of the present invention.
  • Figure 6 net The network side device corresponds to the method of FIG. 1, and details are not described herein again.
  • the network side device 600 includes a determining module 610 and a sending module 620.
  • the determining module 610 determines at least two reference signal resources, where each of the reference signal resources includes at least one resource unit, each of the reference signal resources corresponding to a first configuration information, and one of the at least two reference signal resources is first.
  • the reference signal resource and the at least one second reference signal resource have an overlapping relationship in at least one first time interval, and determine a first configuration corresponding to each of the first reference signal resources in the at least one first time interval information.
  • the sending module 620 sends a reference signal to the user equipment UE on each resource unit of the first reference signal resource according to the first configuration information corresponding to each resource unit in the first reference signal resource in the at least one first time interval. .
  • the RS may be sent to the user equipment UE on the overlapping RE according to the configuration information of the at least two RS resources, and the network side device can configure multiple RS resources for the UE, and therefore, the RS resource can be flexibly configured. Thereby, the RS can be transmitted appropriately. In addition, since there are overlaps in the partial REs, the overhead required to transmit the RS is saved.
  • the determining module 610 determines, according to the overlapping relationship between the first reference signal resource and the at least one second reference signal resource, each of the first reference signal resources in the at least one first time interval.
  • the determining module 610 for each overlapping resource unit that overlaps with the at least one second reference signal resource in the first reference signal resource, includes the overlapping resource unit and includes the number of resource units.
  • the first configuration information corresponding to the least reference signal resource is determined as the first configuration information of the overlapping resource unit.
  • the determining module 610 includes the overlap in the at least one second reference signal resource if the resource elements of the first reference signal resource and the at least one second reference signal resource are different.
  • the first configuration information corresponding to the reference signal resource of the resource unit is determined as the first configuration information of the overlapping resource unit.
  • the determining module 610 uses the first configuration information corresponding to the first reference signal resource. Or the first configuration information corresponding to one of the at least one second reference signal resource is determined as the first configuration information of the overlapping resource unit; and there is no overlap between the first reference signal resource and the at least one second reference signal resource.
  • the determining module 610 includes the first reference signal resource and the at least one second reference signal resource The first configuration information corresponding to the reference signal resource of the non-overlapping resource unit is determined as the first configuration information of the non-overlapping resource unit.
  • the sending module 620 further sends the second configuration information of the at least two reference signal resources to the UE before sending the reference signal to the UE, or sends the at least two to the UE.
  • the second configuration information of the reference signal resource and the first configuration information; or, the second configuration information of the at least two reference signal resources is sent to the UE, and for different reference signal resources of the at least two reference signal resources, Sending different types of first configuration information to the UE; or, for the first reference signal resource, transmitting only second configuration information of the first reference signal resource to the UE, and sending the at least one second reference signal resource to the UE Second configuration information and first configuration information.
  • the determining module 610 determines, according to the resource unit information and the second configuration information of each of the at least two reference signal resources, each of the at least two reference signal resources.
  • the resource unit information of the at least two reference signal resources is the same, and the determining module 610 is configured according to the same resource unit information and each of the at least two reference signal resources.
  • the second configuration information determines a resource unit corresponding to the second configuration information of each of the at least two reference signal resources, where the sending module 620 further sends the same resource unit information to the UE.
  • the first reference signal resource comprises all resource elements of the at least one second reference signal resource.
  • the determining module 610 determines first configuration information of each resource unit according to how many times each of the overlapping resource units is included by the at least two reference signal resources, wherein The first configuration information of the reference signal resource including the least number of resource units for which the first configuration information is not determined is determined as the first configuration information of the resource unit of the undetermined first configuration information.
  • the determining module 610 determines the first configuration information of the first reference signal resource as the first configuration information that there is no overlapping resource unit between the first reference signal resource and the at least one second reference signal resource. And determining first configuration information of one of the at least one second reference signal resource as the first reference signal resource and the at least one second reference signal resource There is a first configuration information of overlapping resource units between one of them.
  • the sending module 620 may be configured by using different network side devices, according to the first configuration information corresponding to each resource unit in the first reference signal resource, on each resource unit of the first reference signal resource.
  • a reference signal is sent to the UE.
  • different network devices may correspond to different first configuration information, and the sending module 620 may send a reference signal to the UE on the resource unit in the first reference signal resource corresponding to the first configuration information.
  • the network side device 600 may be a central control node, and the reference signals may be sent by different network side devices controlled by the central control node.
  • the sending module 620 does not overlap between the first reference signal resource and the at least one second reference signal resource according to the first configuration information of the different reference signal resources by using different network side devices.
  • the reference signal is sent to the UE on the resource unit and the resource unit that overlaps.
  • the network side device 600 may be a central control node, and the reference signals may be sent by different network side devices controlled by the central control node.
  • the sending module 620 is further configured to perform, according to the transmission time interval in which the resource units of the at least two reference signal resources do not overlap, according to the reference signal transmitted on the overlapping transmission time interval.
  • the first configuration information of the resource, the reference signal is sent to the UE on a resource unit of the reference signal resource transmitted on the transmission time interval that does not overlap.
  • the second configuration information includes antenna port information
  • the first configuration information includes at least one of power information, sequence information, and time information.
  • each unit of the network side device 600 For the operation and function of each unit of the network side device 600, reference may be made to the embodiment of the method of FIG. 1. To avoid repetition, details are not described herein again.
  • User equipment 700 is a structural schematic diagram of a user equipment in accordance with an embodiment of the present invention.
  • the user equipment of FIG. 7 corresponds to the method of FIG. 3, and details are not described herein again.
  • User equipment 700 includes a determination module 710 and a receiving module 720.
  • the determining module 710 determines at least two reference signal resources, where each of the reference signal resources includes at least one resource unit, each of the reference signal resources corresponding to a first configuration information, and one of the at least two reference signal resources is first
  • the reference signal resource and the at least one second reference signal resource have an overlapping relationship in at least one first time interval, and determine a first configuration corresponding to each of the first reference signal resources in the at least one first time interval information.
  • Receiving module 720, according to the first reference signal, in the at least one first time interval The first configuration information corresponding to each resource unit in the resource receives a reference signal from the network side device on each resource unit of the first reference signal resource.
  • the RS may be received from the network side device on the overlapping RE according to the configuration information of the at least two RS resources, and the network side device can configure multiple RS resources for the UE, and therefore, the RS resource can be flexibly configured. Thereby, the RS can be transmitted appropriately. In addition, since some of the REs overlap, the overhead required to transmit the RS is saved.
  • the determining module 710 will include the overlapping resource unit and include the number of resource units
  • the first configuration information corresponding to the least reference signal resource is determined as the first configuration information of the overlapping resource unit.
  • the determining module 710 includes the overlap in the at least one second reference signal resource if the resource elements of the first reference signal resource and the at least one second reference signal resource are different.
  • the first configuration information corresponding to the reference signal resource of the resource unit is determined as the first configuration information of the overlapping resource unit.
  • the determining module 710 uses the first configuration information corresponding to the first reference signal resource. Or the first configuration information corresponding to one of the at least one second reference signal resource is determined as the first configuration information of the overlapping resource unit; and there is no overlap between the first reference signal resource and the at least one second reference signal resource. For each non-overlapping resource unit, the determining module 710 determines, as the non-overlapping resource, the first reference signal resource and the first configuration information corresponding to the reference signal resource of the at least one second reference signal resource that includes the non-overlapping resource unit. The first configuration information of the unit.
  • the receiving module 720 before receiving the reference signal from the network side device, the receiving module 720 further receives the second configuration information of the at least two reference signal resources from the network side device, and preset the first configuration information. Or receiving the second configuration information and the first configuration information of the at least two reference signal resources from the network side device; or receiving the second configuration information of the at least two reference signal resources from the network side device, and Different reference signal resources in the at least two reference signal resources, receiving different types of the first type from the network side device Or a configuration information; or, for the first reference signal resource, receiving only the second configuration information of the first reference signal resource from the network side device or not using the first configuration information received from the network side device, and from the network side
  • the device receives the second configuration information and the first configuration information of the at least one second reference signal resource.
  • the receiving module 720 further receives the resource unit information of each of the at least two reference signal resources from the network side device, where the determining module 610 is specifically configured to use according to the foregoing at least two The resource unit information and the second configuration information of each of the reference signal resources determine a resource unit corresponding to the resource unit information and the second configuration information of each of the at least two reference signal resources .
  • the receiving module 720 further receives the same resource unit information from the network side device if the resource unit information of the at least two reference signal resources is the same, and the determining module 720 is specifically used to Determining, according to the same resource unit information and second configuration information of each of the at least two reference signal resources, corresponding to second configuration information of each of the at least two reference signal resources Resource unit.
  • the first reference signal resource comprises all resource elements of the at least one second reference signal resource.
  • the determining module 710 determines first configuration information of each resource unit according to how many times each of the overlapping resource units is included by the at least two reference signal resources, wherein The first configuration information of the reference signal resource including the least number of resource units for which the first configuration information is not determined is determined as the first configuration information of the resource unit of the undetermined first configuration information.
  • the determining module 710 determines the first configuration information of the first reference signal resource as the first configuration information that there is no overlapping resource unit between the first reference signal resource and the at least one second reference signal resource. And determining, by the first configuration information of one of the at least one second reference signal resource, first configuration information that there is an overlapping resource unit between the first reference signal resource and the at least one second reference signal resource.
  • the receiving module 720 may receive, on each resource unit of the first reference signal resource, a device from a different network side device according to the first configuration information corresponding to each resource unit in the first reference signal resource.
  • Reference signal Specifically, different network devices may correspond to different first configuration information, and the receiving module 720 may be in the first configuration information.
  • a reference signal from a different network side device is received on the resource unit in the first reference signal resource corresponding to the information.
  • the receiving module 720 respectively does not have overlapping resource units and overlaps between the first reference signal resource and the at least one second reference signal resource according to the first configuration information of the different reference signal resources.
  • the reference signal from different network side devices is received on the resource unit.
  • the receiving module 720 is further configured to perform, according to the transmission time interval that the overlapping of the resource elements of the at least two reference signal resources are not overlapped, according to the reference signal that is transmitted on the overlapping transmission time interval.
  • the first configuration information of the resource receives the reference signal from the network side device on a resource unit of the reference signal resource transmitted on the transmission time interval that does not overlap.
  • the second configuration information includes antenna port information
  • the first configuration information includes at least one of power information, sequence information, and time information.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are merely illustrative.
  • the division of the unit is only a logical function division.
  • there may be another division manner for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interface, device or single
  • the indirect coupling or communication connection of the element can be electrical, mechanical or other form.
  • the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium.
  • the technical solution of the present invention which is essential or contributes to the prior art, or a part of the technical solution, may be embodied in the form of a software product, which is stored in a storage medium, including A number of instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and the like, which can store program codes. .

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Abstract

La présente invention concerne un procédé de transmission d'un signal de référence, un équipement d'utilisateur (UE) et un dispositif côté réseau. Le procédé consiste à : déterminer au moins deux ressources de signal de référence, chaque ressource de signal de référence comprenant au moins une unité de ressource et correspondant à un élément de premières informations de configuration, et une première ressource de signal de référence parmi lesdites au moins deux ressources de signal de référence et au moins une deuxième ressource de signal de référence ayant une relation de recouvrement dans au moins un premier intervalle de temps; déterminer des premières informations de configuration correspondant à chaque unité de ressource dans la première ressource de signal de référence dans au moins un premier intervalle de temps; dans ledit au moins un intervalle de temps, selon les premières informations de configuration correspondant à chaque unité de ressource dans la première ressource de signal de référence, envoyer un signal de référence à l'UE sur chaque unité de ressource de la première ressource de signal de référence. Cette solution technique peut configurer de manière flexible des ressources de signal de référence et éviter le surdébit requis pour la transmission du signal de référence.
PCT/CN2013/080533 2012-07-31 2013-07-31 Procédé de transmission de signal de référence, équipement d'utilisateur et dispositif côté réseau WO2014019517A1 (fr)

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