WO2012092721A1 - 探测参考信号的发送方法、基站和用户设备 - Google Patents

探测参考信号的发送方法、基站和用户设备 Download PDF

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Publication number
WO2012092721A1
WO2012092721A1 PCT/CN2011/070093 CN2011070093W WO2012092721A1 WO 2012092721 A1 WO2012092721 A1 WO 2012092721A1 CN 2011070093 W CN2011070093 W CN 2011070093W WO 2012092721 A1 WO2012092721 A1 WO 2012092721A1
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WIPO (PCT)
Prior art keywords
reference signal
sounding reference
resource
user equipment
information
Prior art date
Application number
PCT/CN2011/070093
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English (en)
French (fr)
Inventor
王轶
周华
吴建明
Original Assignee
富士通株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/CN2011/070093 priority Critical patent/WO2012092721A1/zh
Priority to CN2011800604966A priority patent/CN103262627A/zh
Publication of WO2012092721A1 publication Critical patent/WO2012092721A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signaling for the administration of the divided path
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/23Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method for transmitting a sounding reference signal, a base station, and a user equipment. Background technique
  • the Sounding Reference Symbol is a signal sent by the User Equipment (UE) to the base station, and is used for channel quality detection, power control, timing estimation, and direction of arrival estimation for downlink beamforming. Reference signal.
  • a user equipment UE In a Long-term Evolution System (LTE), a user equipment UE according to resources indicated by a base station (e-NodeB, eNB), such as a transmission bandwidth, a frequency domain start position, a cyclic shift (Cyclic Shift, CS), and a child
  • the parameters such as the frame shift periodically transmit the sounding reference signal SRS and are transmitted in the last Orthogonal Frequency Division Multiplexing (OFDM) symbol of each subframe.
  • the base station eNB determines the channel state information (CSI) of the uplink of the user equipment UE according to the received sounding reference signal SRS, and performs frequency domain selection scheduling and the like according to the obtained wireless signal information CSI.
  • the resource indicated by the base station eNB is configured by a higher layer, that is, a Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • the transmission of the aperiodic sounding reference signal SRS is added.
  • the downlink control signaling (DCI) for the uplink transmission sent by the base station is triggered, that is, the DCI format 0 and the DCI format 4 are used to notify the user equipment whether to send the aperiodic sounding reference signal SRS, and The resource used in the case of the aperiodic sounding reference signal SRS.
  • DCI downlink control signaling
  • the inventors have found that the following problems exist in the prior art:
  • an opportunity to transmit the sounding reference signal SRS aperiodically is added, and the downlink physical downlink shared channel is The Physical Downlink Shared Channel (PDSCH) transmits the channel information that provides assistance, and is expected to indicate the downlink of the downlink PDSCH reception.
  • the triggering function of the aperiodic sounding reference signal SRS is added to the control signaling DCI, and at the same time, the resource information of the aperiodic sounding reference signal SRS is transmitted.
  • PDSCH Physical Downlink Shared Channel
  • An embodiment of the present invention provides a method for transmitting a sounding reference signal, a base station, and a user equipment.
  • the base station sends the indication information by using downlink control information, such as padding bits, in the DCI format 1A, which is received by the downlink PDSCH.
  • the user equipment UE performs the transmission of the aperiodic sounding reference signal SRS according to the indication information, so that the padding bits in the DCI format 1A can be effectively utilized, and the number of blind detections of the user equipment can be reduced.
  • a method for transmitting a sounding reference signal comprising:
  • the base station generates downlink control information indicating downlink reception, where the downlink control information includes indication information indicating whether the user equipment sends an aperiodic sounding reference signal, and a resource used when transmitting the aperiodic sounding reference signal; And using the padding bits of the downlink control information to carry the indication information;
  • a method for transmitting a sounding reference signal comprising:
  • the user equipment receives the downlink control information that is sent by the base station and indicates that the downlink control information is received by the base station, where the downlink control information includes an indication indicating whether the user equipment sends the aperiodic sounding reference signal and the resource used when sending the aperiodic sounding reference signal. Information; and the base station uses the padding bits of the downlink control information to carry the indication information;
  • a base station includes: an information generating unit, configured to generate downlink control information indicating downlink reception, where the downlink control information includes indicating whether the user equipment sends a non-period a sounding reference signal, and indication information of a resource used when transmitting the aperiodic sounding reference signal; and using the padding bit of the downlink control information to carry the indication information;
  • the information sending unit is configured to send the downlink control information to the user equipment, so that the user equipment performs the sending of the aperiodic sounding reference signal according to the indication information included in the downlink control information.
  • a user equipment is provided, where the user equipment includes:
  • an information receiving unit configured to receive, by the base station, downlink control information that is received by the base station, where the downlink control information includes: indicating whether the user equipment sends the aperiodic sounding reference signal, and transmitting the aperiodic sounding reference signal And indicating information of the used resource; and the base station uses the padding bit of the downlink control information to carry the indication information;
  • an information processing unit configured to perform transmission of the aperiodic sounding reference signal according to the indication information received by the information receiving unit.
  • a computer readable program wherein when the program is executed in a base station, the program causes a computer to execute the transmission method of the sounding reference signal in the base station.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform a method of transmitting the sounding reference signal in a base station.
  • a computer readable program wherein when the program is executed in a user equipment, the program causes the computer to execute the transmission method of the sounding reference signal in the user equipment.
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the above-described method of transmitting a sounding reference signal in a user equipment.
  • the benefit of the embodiment of the present invention is that the base station sends the indication information by using the downlink control information indicating the downlink PDSCH, such as the padding bit in the DCI format 1A, so that the user equipment UE performs the transmission of the aperiodic sounding reference signal SRS, thereby
  • the user equipment can timely transmit the aperiodic sounding reference signal, which can effectively utilize the padding bits in the DCI format 1A, and can reduce the number of blind detections of the user equipment, and avoid the increase of the complexity of the user equipment and the increase of the false alarm probability.
  • FIG. 1 is a flowchart of a method for transmitting a non-periodic sounding reference signal according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a method for transmitting a non-periodic sounding reference signal according to Embodiment 2 of the present invention
  • FIG. 4 is a flowchart of a method for transmitting a non-periodic sounding reference signal on a user equipment side according to Embodiment 3 of the present invention
  • Figure 5 is a schematic structural diagram of a base station according to Embodiment 4 of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station according to Embodiment 5 of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station according to Embodiment 6 of the present invention.
  • FIG. 8 is a schematic structural diagram of a user equipment according to Embodiment 7 of the present invention.
  • FIG. 9 is a block diagram showing the structure of an information processing unit according to Embodiment 7 of the present invention.
  • Figure 10 is a block diagram showing the configuration of an information processing unit according to a seventh embodiment of the present invention. detailed description
  • LTE-A Long Term Evaluation Advanced
  • FDD Frequency Division Duplexing
  • FIG. 1 is a flow chart of a method for transmitting a sounding reference signal in Embodiment 1 of the present invention. As shown in Figure 1, the method includes:
  • Step 101 The base station generates downlink control information DCI indicating downlink reception, where the downlink control information includes: indicating whether the user equipment UE sends an aperiodic sounding reference signal, and the resource used when transmitting the aperiodic sounding reference signal Indicating information; and using the padding bits of the downlink control information DCI to carry the indication information;
  • Step 102 The base station sends the downlink control information DCI to the user equipment UE, so that the user equipment UE performs the transmission of the aperiodic detection reference signal SRS according to the indication information included in the downlink control information DIC.
  • the downlink control signaling (DCI) sent by the uplink PUSCH such as DCI format 0 and DCI format 4, may be indicated.
  • the user equipment UE performs the transmission of the aperiodic sounding reference signal SRS, and indicates the resource information used for transmitting the aperiodic sounding reference signal SRS when the user equipment UE is instructed to transmit the aperiodic sounding reference signal SRS.
  • the trigger function of the aperiodic sounding reference signal SRS may be added to the DCI indicating the downlink PDSCH reception.
  • the resource information indicating the transmission of the aperiodic sounding reference signal SRS is indicated.
  • the downlink control information may be downlink control information in the format of 1A, but is not limited to the downlink control information, and may be other downlink control information indicating downlink PDSCH reception.
  • Table 1 shows the bearer information and length of DCI format 0 in the LTE FDD system in a 10 MHz wideband configuration; wherein the 3 bit carrier indication is configurable in the user-specific search space, and the lbit aperiodic SRS request is configurable in the user-specific search space.
  • the 2bit aperiodic CQI request is configurable in the user-specific search space, and is only configured as lbit in the common search space or single carrier.
  • Table 2 shows the bearer of DCI format 1A in the LTE FDD system in a 10MHz wideband configuration. Information and length.
  • the downstream control information DCI format 1A and DCI format 0 indicating that the downlink PDSCH is received, which is relatively close to the payload, is the same length by adding padding bits.
  • DCI format 1A and DCI format 0 need to be the same length.
  • DCI format 1A needs to be increased by at least 2 bits to achieve the same length as DCI format 0, so that the added bits are padding bits, which are not utilized in the prior art.
  • the downlink control information indicating the downlink PDSCH reception such as the newly added padding bit in the DCI format 1A, carries a trigger for indicating the aperiodic sounding reference signal SRS, and a sounding reference signal indicating that the aperiodic is sent.
  • the indication information of the resource information of the SRS is effectively utilized, and the user equipment can timely send the aperiodic sounding reference signal SRS, which reduces the number of blind detections of the downlink control signal PDCCH by the user equipment, and avoids the increase of user equipment complexity and false alarm. The increase in probability.
  • Table 3 shows the bearer information and length of DCI format 1A in the LTE-A FDD system according to the embodiment of the present invention in a 10 MHz wideband configuration.
  • the following uses the 10MHz broadband configuration in the LTE-A FDD system as shown in Table 3.
  • the padded 2-bit in the DCI format 1A of the downlink PDSCH reception triggers the transmission of the aperiodic sounding reference signal and indicates the resource used for transmitting the aperiodic sounding reference signal as an example to the aperiodic sounding reference signal of the embodiment of the present invention.
  • the sending method is explained. It should be noted that the use of the padding bits in the DCI format 1A to trigger the transmission of the aperiodic SRS is only an embodiment of the present invention.
  • the downlink control information of other formats indicating the downlink PDSCH reception may also be used to trigger the transmission of the aperiodic SRS.
  • the base station may generate corresponding downlink control information DCI according to the transmission mode and the system requirement, which is similar to the prior art and will not be further described herein; wherein, the padding bit in the DCI format 1A is utilized.
  • the transmission of the aperiodic sounding reference signal SRS is triggered, that is, whether to transmit the aperiodic sounding reference signal SRS, and the resource information indicating the transmission of the aperiodic sounding reference signal SRS.
  • the above representation is only an embodiment of the present invention, and other ways may be used to indicate the above situation.
  • the base station may pre-configure a plurality of groups of resources, each of the plurality of groups of resources includes resource information used to send the aperiodic sounding reference signal; and then configuring the plurality of groups of resources and And indicating, by the user equipment, that the resource used by the user equipment is one of a plurality of pre-configured resources; wherein the multi-group of resources is used by the user equipment to send the non-period sounding reference signal. It is configured entirely through high-level signaling, such as RRC.
  • the base station configures three sets of resources for the user equipment UE by using RRC, and each set of resources includes resource information used for transmitting the aperiodic sounding reference signal; and the three groups are The resource information is stored in association with the 2bit indication information. And the corresponding relationship is also stored on the user equipment UE side.
  • the value of the configured resource may be determined according to the actual situation, and is only indicated by a symbol.
  • the sending, by the user equipment UE, the aperiodic SRS in the predetermined time may include: if the user equipment UE receives the DCI including the trigger information in the nth subframe, the first satisfaction period of the user after at least 4 subframes and The subframe of the offset condition transmits the aperiodic SRS; in addition, the configured resource information may be the same as or different from the corresponding resource information in the DCI format 0/DCI format 4. Similar to the resource information corresponding to the periodic SRS, it may also be a subset of the resource information of the periodic SRS.
  • the resource information may include: SRS period, SRS offset, SRS bandwidth (SRS Bandwidth), frequency domain position (Frequency Domain Position), and frequency hopping bandwidth (SRS Hopping Bandwidth) (if frequency hopping is supported) Transmission Comb, Cyclic Shift, antenna information, such as Number of Antenna Ports, or carrier information, such as Number of CC Index.
  • the base station notifies the user equipment of the configured mapping relationship as shown in Table 4A and stores it on the user equipment UE side.
  • the base station may according to the indication information, And a mapping relationship between the pre-stored indication information and the used resource (as shown in Table 4A) to determine whether to send the aperiodic sounding reference signal SRS, and in the case of transmitting the aperiodic sounding reference signal SRS, determine the resource used.
  • the base station configures to send the aperiodic sounding reference signal SRS.
  • the resource information used may include all resource information required to transmit the aperiodic sounding reference signal SRS.
  • some resource information is shared by the sounding reference signal SRS and the aperiodic sounding reference signal SRS.
  • the base station generally configures all the resource information used by the periodically transmitted SRS through the high layer signaling. Therefore, when the base station uses the high layer signaling configuration to send the resource information used by the aperiodic sounding reference signal SRS, the shared resources may not be configured.
  • the resource information used by each of the plurality of groups of resources configured by the base station to send the aperiodic sounding reference signal SRS is a periodic transmission sounding reference signal SRS configured by the base station through high layer signaling. A subset of the resource information used. In this way, the user equipment UE can send the aperiodic SRS according to the resources used by the base station to send the aperiodic SRS through the high-level configuration, and the pre-stored shared resources.
  • Table 4B is a table of relationship between 2 bit indication information and corresponding resource mapping in the embodiment of the present invention.
  • the resource used by the base station to transmit the aperiodic SRS is a subset of the resources used by the SRS of the transmission period.
  • the table 4B includes a part of resources of all resources required for transmitting the aperiodic SRS, that is, does not include the shared resources, such as the SRS period and the SRS offset, if it is determined that the non-periodic SRS is sent.
  • the indication information, the mapping relationship between the pre-stored indication information and the used resource (such as Table 4B) determine the resource used to send the aperiodic SRS, and then the user equipment UE uses the determined resource and the pre-stored shared resource to send the aperiodic SRS.
  • the used resource for transmitting the aperiodic sounding reference signal SRS may also be configured as follows.
  • the base station configures a part of resource information in the resource information used to send the aperiodic sounding reference signal SRS, and the part of the resource information may be configured by the base station by using high layer signaling, such as RRC; and then configuring the part of the resource information.
  • RRC high layer signaling
  • the part of the resource information may be part of the resource information required for the user equipment UE to send the aperiodic sounding reference signal SRS, that is, a subset of the resource information required for transmitting the aperiodic sounding reference signal SRS; And configuring, according to the part of the resource information, a resource required for sending the aperiodic sounding reference signal; wherein the resource includes one or more of resources other than the partial resource information configured by the high layer signaling, as the case may be And the base station stores the resources other than the part of the resource information configured by the high-level signaling corresponding to the corresponding indication information, and stores the corresponding relationship on the user equipment UE side. And, when the user equipment is instructed to send the aperiodic sounding reference signal, the resource indicated by the user equipment in the indication information is a resource required to send the aperiodic sounding reference signal except the part of the resource.
  • the information used by the user equipment UE to send the aperiodic sounding reference signal SRS can be partially configured through high layer signaling, and partially passed the indication information, such as the 2 bit shown in Table 3.
  • the dynamically configured resource information may include one or a few of the antenna information, the carrier information, and the cyclic shift, but is not limited thereto, and the dynamically configured resources may be determined according to actual conditions.
  • Table 5 is a mapping table between the number of antenna ports and the indication information in the embodiment of the present invention.
  • Table 6 is a component carrier index in the embodiment of the present invention.
  • Table 7 is a table showing the mapping relationship between the cyclic shift and the indication information in the embodiment of the present invention.
  • the base station in the case of dynamically indicating resources, notifies the user equipment UE and the user in the configured mapping relationship shown in Table 5 or Table 6 or Table 7 and a group of partial resource information configured through the upper layer.
  • the UE is stored on the UE side, so that when the user equipment UE receives the downlink control information DCI, it may determine whether to send the aperiodic sounding reference signal SRS according to the indication information therein, and if the aperiodic sounding reference signal SRS is transmitted.
  • the non-periodic sounding reference signal SRS is transmitted by part of the resource information configured by the high layer signaling.
  • the part of the resource information includes resources shared by the sounding reference signal SRS and the aperiodic sounding reference signal SRS.
  • the shared resource may not be included, and the shared resource is previously notified to the user equipment by the base station, and is stored on the base station side and the user equipment side for use by the user equipment UE, and the foregoing resources.
  • the configuration is similar.
  • the shared resource may be pre-configured by the base station and notified to the user equipment and on the user equipment side.
  • the mapping information between the indication information and the pre-stored indication information and the used resource may be used according to the table (eg, 5 or Table 6 or Table 7) to determine the resources used, and then use the determined resources, a pre-configured set of partial resource information (excluding shared resources), and pre-stored shared resources to send aperiodic sounding reference signals SRS.
  • the base station sends the indication information by using the padding bits in the DCI format 1A that is received by the downlink PDSCH, so that the user equipment UE performs the transmission of the aperiodic sounding reference signal SRS, so that the user equipment can send the non-sense in time.
  • the periodic sounding reference signal effectively utilizes the padding bits in the DCI format 1A; in addition, the number of blind detections of the user equipment can be reduced, the complexity of the user equipment is increased, and the probability of false alarms is increased; in addition, by sharing the SRS of the transmission period
  • the resources used or dynamically configured resources can reduce the high-level signaling overhead, and more flexibly transmit the aperiodic sounding reference signal SRS to reduce the collision probability between user equipment UEs.
  • FIG. 2 is a flow chart showing a method of transmitting a sounding reference signal according to Embodiment 2 of the present invention. As shown in Figure 2, the method includes:
  • Step 201 The user equipment UE receives the downlink control information DCI indicating that the downlink is received by the base station, where the downlink control information DCI includes indicating whether the user equipment UE sends the aperiodic sounding reference signal, and sends the aperiodic sounding reference signal. And indicating information of the used resource; and the base station uses the padding bit of the downlink control information to carry the finger information;
  • Step 202 The user equipment UE performs transmission of the aperiodic sounding reference signal SRS according to the indication information.
  • the format of the downlink control information that is received by the downlink may be 1 ⁇ , but is not limited to the downlink control information, and may be other downlink control information indicating downlink PDSCH reception.
  • the base station sends the indication information by using the padding bits in the DCI format 1A that is received by the downlink PDSCH, so that the user equipment UE performs the aperiodic period.
  • the detection of the reference signal SRS is transmitted, so that the user equipment can timely transmit the aperiodic sounding reference signal, and effectively utilize the padding bits in the DCI format 1A; in addition, the number of blind detections of the user equipment can be reduced, and the complexity of the user equipment can be avoided. And the increase in the probability of false alarms.
  • the base station configures the resource information used by the non-periodic sounding reference signal SRS through the high layer signaling, and notifies the user equipment UE and pre-stores the resource information configured by the base station through the high layer on the user equipment UE side.
  • the user equipment UE performs the sending of the aperiodic sounding reference signal according to the indication information, which may include: if the user equipment determines that the indication information is to send the aperiodic sounding reference signal Instructing, the user equipment determines, according to the indication information, and the first mapping relationship between the pre-stored indication information and the resource, the resource used to send the aperiodic sounding reference signal; the user equipment sends the non-determined resource by using the determined resource Periodic sounding reference signal.
  • the first resource mapping relationship is a correspondence between the multiple groups of resources configured by the base station and the indication information (as shown in Table 4A), where each of the multiple groups of resources includes sending the aperiodic The resource information used to probe the reference signal.
  • the resource configured by the base station may not include the shared resource
  • the first mapping relationship may be a mapping relationship as shown in Table 4B, so that the user equipment according to the indication information, And a pre-stored mapping relationship as shown in Table 4B to determine a resource used to transmit the aperiodic sounding reference signal; the user equipment transmits the aperiodic sounding reference signal using the determined resource and the pre-configured shared resource.
  • the resources may be dynamically configured.
  • the specific configuration manner is as shown in Embodiment 1, and details are not described herein again.
  • the user equipment UE side pre-stores part of the resource information of the non-periodic sounding reference signal SRS that is configured by the base station through the high layer, and also stores a mapping relationship between the resources and the indication information other than the part of the resource information, such as Table 5 to Table 7 are shown.
  • the part of the resource information is a subset of the resource information used to send the aperiodic sounding reference signal SRS.
  • the user equipment UE performs the sending of the aperiodic detection reference signal according to the indication information, which may specifically include:
  • the user equipment UE determines that the indication information is the indication information for sending the aperiodic sounding reference signal, the user equipment determines to send the aperiodic sounding reference according to the indication information and the pre-stored indication information and the second mapping relationship of the resources.
  • the second mapping relationship is a correspondence between the resources required to send the aperiodic sounding reference signal and the indication information except for part of the resource information used by the base station to transmit the aperiodic sounding reference signal ( Table 5 or Table 6 or Table 7).
  • the user equipment UE can know that the aperiodic sounding reference signal SRS is not transmitted, and the component carrier CC is not used;
  • the aperiodic sounding reference signal SRS, where " ⁇ " can be configured by higher layer signaling RRC. In this way, the user equipment UE can utilize some resources of the high-level configuration and resources indicated by the indication information “ ⁇ ”.
  • the user equipment UE can use the partial resources configured by the upper layer and the resources indicated by the indication information ' ⁇ ' to transmit
  • Tables 5 to 7 are only the case of the embodiment of the present invention, but are not limited thereto, and other information may be dynamically configured, which may be determined according to actual conditions. In this way, by adopting dynamic configuration resources, the high-level signaling overhead can be reduced, and the aperiodic sounding reference signal SRS can be more flexibly transmitted, and the collision probability between user equipment UEs can be reduced.
  • the above embodiment is described by taking as an example a case where a part of the resources configured by the base station includes the sounding reference signal SRS and the non-period sounding reference signal SRS.
  • the part of the resources configured by the base station may not include the shared resources, and the shared resources are stored in advance on the base station side and the user equipment side for use by the user equipment UE.
  • the user equipment UE performs the sending of the aperiodic sounding reference signal according to the indication information, which may specifically include:
  • the user equipment UE determines that the indication information is the indication information for sending the aperiodic sounding reference signal, the user equipment determines, according to the indication information, the pre-stored indication information, and the second mapping relationship of the resources, the used to send the aperiodic SRS. Part of the resource; the user equipment transmits the aperiodic sounding reference signal SRS by using the determined resource, the pre-stored partial resource configured by the base station, and the pre-stored shared resource.
  • the downlink control information indicating downlink reception such as the padded 2-bit in the DCI format 1A, triggers the transmission of the aperiodic sounding reference signal and indicates
  • the method for transmitting the aperiodic sounding reference signal is used as an example to send the aperiodic sounding reference signal in the embodiment of the present invention. Line description.
  • FIG. 3 is a flowchart of a method for transmitting a base station side sounding reference signal according to Embodiment 3 of the present invention. As shown in Figure 3, the method includes:
  • Step 301 The base station constructs corresponding DCI source bits according to different functions
  • the corresponding DCI source bit may be generated according to the transmission mode and the system requirement.
  • the process of generating the DCI source bit is similar to the prior art, and is not described here.
  • the DCI indicating the downlink receiving is generated, and the format of the DCI is 1A, and the information of the 2 bit bearer in the DCI format 1A is used, and the indication information is as described in Embodiments 1 and 2, and details are not described herein again.
  • Step 302 The base station adds a cyclic redundancy check code to the generated DCI source bit (Cyclic)
  • Step 303 Perform modulation coding and rate matching on the CRC-added DCI source bits.
  • Step 304 forming a physical control channel (Physical Downlink Control Channel,
  • PDCCH Physical Downlink Control Channel
  • the UE sends.
  • FIG. 4 is a flow chart showing a method for transmitting a user equipment side sounding reference signal according to Embodiment 3 of the present invention. As shown in Figure 4, the method includes:
  • the user equipment UE detects a possible DCI according to the transmission mode, and then determines whether to send the aperiodic SRS according to the detected DCI, which specifically includes:
  • Step 401 A user receives a PDCCH on a corresponding time-frequency resource.
  • Step 402 Perform rate de-matching, demodulation and decoding.
  • Step 403 Determine whether the CRC check is correct or incorrect; if the judgment result is correct, execute step 404, otherwise perform step 407.
  • Step 404 in step 403, the result of the determination is that the CRC check is correct, and then further determines whether to send a non-periodic SRS; if the result of the determination is sent, then step 405 is performed, otherwise step 409 is performed;
  • sending the aperiodic SRS at the predetermined time may specifically include: If the user equipment UE receives the DCI including the trigger information in the nth subframe, the user transmits the aperiodic SRS in the first subframe that satisfies the period and the offset condition after at least four subframes.
  • Step 405 In step 404, if the result of the determination is that the aperiodic SRS is sent, the user equipment UE may determine the used resource according to the 2 bit indication information.
  • the user equipment UE may find the resource corresponding to the indication information according to the 2 bit indication information lookup table; as described in Embodiments 1 and 2, I will not repeat them here;
  • the user equipment UE may look up Table 5 or Table 6 or Table 7 according to the indication information of the 2 bits, and find some resources corresponding to the indication information;
  • the resource for sending the aperiodic SRS is a part of resources that the pre-stored base station configures through the upper layer (such as Table 4B), and some resources found according to the indication information table (Table 5 or Table 6 or Table 7);
  • Step 406 The user equipment UE sends the aperiodic time at a predetermined time by using the determined resource.
  • the corresponding PDSCH can also be received.
  • Step 407 In step 403, if the CRC check is incorrect, it is determined whether the maximum number of blind detections is exceeded. If the determination result is yes, then step 408 is performed; otherwise, return to step 401.
  • Step 408 In step 407, if the determination result is yes, the PDCCH is discarded, and the process ends.
  • Step 409 in step 404, if the result of the determination is that the aperiodic SRS is not sent, the user equipment UE does not send the aperiodic SRS;
  • the base station sends the indication information by using the padding bits in the DCI format 1A that is received by the downlink PDSCH, so that the user equipment UE performs the transmission of the aperiodic sounding reference signal SRS, so that the user equipment can send the non-sense in time.
  • Periodic detection The reference signal effectively utilizes the padding bits in the DCI format 1A; in addition, the number of blind detections of the user equipment can be reduced, and the complexity of the user equipment and the probability of false alarms are avoided.
  • the high-level signaling overhead can be reduced, and the aperiodic sounding reference signal SRS can be transmitted more flexibly, and the collision probability between user equipments UE can be reduced.
  • the embodiment of the invention further provides a base station and a user equipment, as described in the following embodiments.
  • the method for solving the problem is similar to the method for transmitting the non-period sounding reference signal based on the base station and the user equipment. Therefore, the implementation of the base station and the user equipment can refer to the implementation of the method, and the repeated description is omitted.
  • FIG. 5 is a block diagram showing the structure of a base station according to Embodiment 4 of the present invention.
  • the base station includes: an information generating unit 501 and an information sending unit 502;
  • the information generating unit 501 is configured to generate downlink control information indicating downlink reception, where the downlink control information includes an indication indicating whether the user equipment sends an aperiodic sounding reference signal, and a resource used when transmitting the aperiodic sounding reference signal Information; and using the padding bits of the downlink control information to carry the indication information;
  • the information sending unit 502 is configured to send downlink control information to the user equipment, so that the user equipment performs the sending of the aperiodic sounding reference signal according to the indication information included in the downlink control information.
  • the information generating unit 501 can adopt the method shown in FIG. 3, and details are not described herein again.
  • the format of the downlink control information may be 1A, but is not limited to the downlink control information, and may be other downlink control information indicating downlink PDSCH reception.
  • the base station sends the indication information by using the padding bits in the DCI format 1A that is received by the downlink PDSCH, so that the user equipment UE performs the transmission of the aperiodic sounding reference signal SRS, so that the user equipment can send the non-sense in time.
  • the periodic sounding reference signal effectively utilizes the padding bits in the DCI format 1A; in addition, the number of blind detections of the user equipment can be reduced, and the complexity of the user equipment and the probability of false alarms are avoided.
  • the base station includes: an information generating unit 601 and an information sending unit 602, which are similar to the embodiment 4, and are not described herein again.
  • the base station may further include a first resource configuration unit 603 and a first mapping relationship storage unit 604;
  • a first resource configuration unit 603, configured to configure multiple groups of resources, each of the plurality of groups of resources includes resource information used to send the aperiodic sounding reference signal;
  • the first mapping relationship storage unit 604 is configured to store the configured plurality of groups of resources corresponding to the corresponding indication information
  • the resource indicated by the user equipment in the indication information is one of a plurality of pre-configured resources.
  • the base station can transmit the resource information used by the aperiodic sounding reference signal through high layer signaling, such as RRC configuration, and store the resource in association with the indication information, as shown in Table 4A.
  • high layer signaling such as RRC configuration
  • the resource information used by the aperiodic sounding reference signal included in each of the plurality of groups of resources configured by the first resource configuration unit 603 may be a sounding reference configured by the base station. All resource information of the signal (as in Table 4A) may also be a subset of the total resource information (see Table 4B). As described in Embodiments 1-3, it will not be described here.
  • FIG. 7 is a block diagram showing the structure of a base station according to Embodiment 6 of the present invention.
  • the base station includes: an information generating unit 701 and an information sending unit 702, which are similar to the embodiment 4, and are not described herein again.
  • the base station further includes: a second resource configuration unit 703, a storage unit 704, and a third resource configuration unit 705;
  • a second resource configuration unit 703, configured to configure a part of resource information in a resource used for sending the aperiodic sounding reference signal
  • the storage unit 704 is configured to store part of the resource information configured by the second resource configuration unit.
  • the third resource configuration unit 705 is configured to configure multiple groups of resources required to send the aperiodic sounding reference signal except part of the resource information.
  • a second mapping relationship storage unit 706, configured to configure a plurality of groups of partial resource information
  • the resource required for sending the aperiodic sounding reference signal is stored corresponding to the corresponding indication information; and when the user equipment is instructed to send the aperiodic sounding reference signal, the resource indicated by the user equipment in the indication information is part of the resource information. Resources other than the need to send aperiodic sounding reference signals.
  • the partial resources configured by the second resource configuration unit 703 are a subset of the resource information used to transmit the non-periodic sounding reference signals. Specifically, as described in Embodiments 1 to 3, details are not described herein again.
  • the base station may further include an information notification unit (not shown) for using the resources configured by the first resource configuration unit 603, the second resource configuration unit 703, or the third resource configuration unit 705. The information is notified to the user device.
  • an information notification unit (not shown) for using the resources configured by the first resource configuration unit 603, the second resource configuration unit 703, or the third resource configuration unit 705. The information is notified to the user device.
  • the base station does not allocate resources shared with the SRS of the transmission period (such as Table 4B), or allocates part of the resource information of the non-periodic sounding reference signal only through the high-layer signaling configuration.
  • the resource information is dynamically allocated by the indication information, and can be determined from the resources shown in Tables 5 to 7 according to the indication information.
  • the base station sends the indication information by using the padding bits in the DCI format 1A that is received by the downlink PDSCH, so that the user equipment UE performs the transmission of the aperiodic sounding reference signal SRS, so that the user equipment can send the non-sense in time.
  • the periodic sounding reference signal effectively utilizes the padding bits in the DCI format 1A; in addition, the number of blind detections of the user equipment can be reduced, and the complexity of the user equipment and the probability of false alarms are avoided.
  • the high-level signaling overhead is reduced by not configuring resources shared with the SRS of the sending period; or the resource is dynamically indicated by the indication information, which can reduce the high-level signaling overhead and flexibly send the aperiodic SRS, and the smaller user equipment.
  • FIG. 8 is a schematic structural diagram of a user equipment according to Embodiment 7 of the present invention.
  • the user equipment UE includes: an information receiving unit 801 and an information processing unit 802;
  • the information receiving unit 801 is configured to receive, by the base station, downlink control information that is sent to indicate downlink reception, where the downlink control information includes: indicating whether the user equipment sends the aperiodic sounding reference signal, and when the aperiodic sounding reference signal is sent, The indication information of the resource; and the base station uses the padding bits of the downlink control information to carry the indication information;
  • the information processing unit 802 is configured to perform transmission of the aperiodic sounding reference signal according to the indication information received by the information receiving unit 801.
  • the format of the downlink control information may be 1A, but is not limited to the downlink control information, and may be other downlink control information indicating downlink PDSCH reception.
  • the user equipment receives the indication information that is sent by the base station by using the padding bits in the DCI format 1A that is received by the downlink PDSCH, and sends the aperiodic sounding reference signal SRS according to the indication information, so that the user equipment can send the information in time.
  • the aperiodic sounding reference signal effectively utilizes the padding bits in the DCI format 1A; in addition, the number of blind detections of the user equipment can be reduced, and the complexity of the user equipment and the probability of false alarms are avoided.
  • FIG. 9 is a block diagram showing the configuration of an information processing unit in Embodiment 7 of the present invention.
  • the information processing unit 802 includes:
  • the first determining unit 901 is configured to determine whether the indication information is indication information for transmitting the aperiodic sounding reference signal
  • the first resource determining unit 902 is configured to determine, according to the indication information, and the pre-stored indication information and the first mapping relationship of the resources, the resource used for sending the aperiodic sounding reference signal, when the determination result of the first determining unit is YES. ;
  • the first signal sending unit 903 is configured to send the aperiodic sounding reference signal by using the resource determined by the first resource determining unit 902, or send the aperiodic sounding reference by using the resource determined by the first resource determining unit 902 and the pre-stored resource.
  • the signal is as described in Embodiment 1-3, and details are not described herein again.
  • the information processing unit 802 can further include a first storage unit 904 for storing a first mapping relationship between the indication information and the resource, as shown in Table 4A.
  • the first signal sending unit 903 is configured to send the aperiodic sounding reference signal by using the resource determined by the first resource determining unit 902, if the base station is configured with all the resource information used for sending the aperiodic SRS. If the base station configures a subset of all the resource information used to transmit the aperiodic SRS, that is, does not configure the shared resource, as shown in Table 4B, the first signal sending unit 903 uses the resources determined by the first resource determining unit 902. The pre-stored resources are used to send the aperiodic sounding reference signal, as described in Embodiments 1-3, and details are not described herein.
  • FIG. 10 is a block diagram showing the structure of an information processing unit in Embodiment 7 of the present invention. As shown in FIG. 10, the information processing unit 802 includes:
  • a second determining unit 1001 configured to determine whether the indication information is indication information for transmitting a non-periodic sounding reference signal
  • the second resource determining unit 1002 is configured to, when the determination result of the second determining unit 1001 is YES, determine, according to the indication information, and the pre-stored indication information and the second mapping relationship of the resources, the resource used for sending the aperiodic sounding reference signal. ;
  • the second signal sending unit 1003 is configured to send the aperiodic sounding reference signal by using the pre-stored resource and the resource determined by the second resource determining unit 1002.
  • the information processing unit 802 may further include a second storage unit 1004, configured to store a second mapping relationship between the indication information and the resource, as shown in Table 5 to Table 7; and further include a third storage unit 1005, configured to store Part of the resources that the base station configures through high layer signaling.
  • the second signal sending unit 1003. The method is configured to send an aperiodic sounding reference signal by using a pre-stored resource (a group of resources pre-configured by the base station) and a resource determined by the second resource determining unit 1002.
  • the second signal sending unit 1003 is configured to use the pre-stored resource.
  • the pre-storing base station configuration of the set of resources and the pre-stored shared resources, and the resources determined by the second resource determining unit 1002 to send the aperiodic sounding reference signals are as described in the embodiment 1-3, and details are not described herein. .
  • the user equipment may further include a resource information receiving unit (not shown), configured to receive pre-configured resource information sent by the base station, and store the received resource information, for example, to the first storage.
  • a resource information receiving unit (not shown), configured to receive pre-configured resource information sent by the base station, and store the received resource information, for example, to the first storage.
  • Unit 904 second storage unit 1004 or third storage unit 1005.
  • the user equipment receives the indication information that is sent by the base station by using the padding bits in the DCI format 1A, and sends the aperiodic sounding reference signal SRS according to the indication information, so that the user equipment can timely send the aperiodic detection.
  • the reference signal can also reduce the number of blind detections of user equipment, avoiding the increase of user equipment complexity and the increase of false alarm probability.
  • the resource shared by the SRS of the transmission period is not configured to reduce the high-level signaling overhead; the resource is dynamically indicated by the indication information, and the non-periodic SRS can be flexibly transmitted, and the non-periodic SRS can be flexibly transmitted. The probability of collision between.
  • Also provided in the embodiment is a computer readable program, wherein when the program is executed in the base station, the program causes the computer to execute the sounding reference signal as described in Embodiment 1 or 3 in the base station The method of sending the number.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the method of transmitting the sounding reference signal as described in Embodiment 1 or 3 in the base station.
  • a computer readable program is further provided in the embodiment, wherein when the program is executed in the user equipment, the program causes the computer to perform transmission of the sounding reference signal as described in Embodiment 2 or 3 in the user equipment method.
  • Also provided in the embodiment is a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the transmission method of the sounding reference signal as described in Embodiment 2 or 3 in the user equipment.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or a step.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.

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Description

探测参考信号的发送方法、 基站和用户设备 技术领域
本发明涉及一种无线通信领域, 特别涉及一种探测参考信号的发送 方法、 基站和用户设备。 背景技术
探测参考信号(Sounding Reference Symbol, SRS )是用户设备(User Equipment, UE)发送给基站的信号, 是用于基站上行调度的信道质量探 测、 功率控制、 定时估计以及支持下行波束成形的到达方向估计等的参 考信号。
在长期演进系统 (Long-term Evolution System, LTE) 中, 用户设备 UE 按照基站 (e-NodeB, eNB ) 指示的资源, 如发送带宽、 频域起始位 置、 周期位移 (Cyclic Shift, CS ) 和子帧位移等参数, 周期性地发送探测 参考信号 SRS , 且在每个子帧的最后一个正交频分复用 (Orthogonal Frequency Division Multiplexing, OFDM)符号中传送。 该基站 eNB根据 接收到的探测参考信号 SRS 判断该用户设备 UE 上行的无线信号信息 (Channel State Information, CSI) , 并根据获得的无线信号信息 CSI进行 频域选择调度等操作。 其中, 该基站 eNB指示的资源通过高层, 即无线 资源控制协议 (Radio Resource Control, RRC ) 进行配置。
在增强的长期演进系统 ( Advanced Long-term Evolution System, LTE-Advanced) 中, 增加了非周期探测参考信号 SRS的发送。 目前, 通 过基站发送的用于上行传输的下行控制信令 (Downlink Control Information, DCI)进行触发, 即通过 DCI format 0和 DCI format 4通知用 户设备是否发送非周期的探测参考信号 SRS , 以及在发送非周期的探测 参考信号 SRS的情况下所使用的资源。
但是在实现本发明的过程中发明人发现现有技术中存在如下问题: 在 LTE-A系统中,为进一歩增加非周期地发送探测参考信号 SRS的机会, 并为下行的物理下行共享信道 (Physical Downlink Shared Channel , PDSCH)发送提供辅助的信道信息,希望在指示下行 PDSCH接收的下行 控制信令 DCI中增加非周期探测参考信号 SRS的触发功能, 同时, 指示 发送非周期的探测参考信号 SRS的资源信息。但是目前在 LTE-A系统中 还没有简单有效地解决上述问题的方法。 发明内容
本发明实施例的目的在于提供一种探测参考信号的发送方法、 基站 和用户设备, 基站通过利用指示下行 PDSCH接收的下行控制信息, 如 DCI format 1A中的填充比特 ( padding bits ) 来发送指示信息, 以使用户 设备 UE根据该指示信息进行非周期探测参考信号 SRS的发送, 从而既 可有效地利用 DCI format 1A中的填充比特,又可减少用户设备盲检测次数。
根据本发明实施例的一个方面提供了一种探测参考信号的发送方 法, 该方法包括:
基站生成指示下行接收的下行控制信息, 所述下行控制信息包括指 示用户设备是否发送非周期的探测参考信号、 以及在发送所述非周期的 探测参考信号时, 所使用的资源的指示信息; 并且利用所述下行控制信 息的填充比特来承载所述指示信息;
向用户设备发送所述下行控制信息, 以使所述用户设备根据所述下 行控制信息中包含的指示信息进行非周期的探测参考信号的发送。
根据本发明实施例的另一个方面提供了一种探测参考信号的发送方 法, 该方法包括:
用户设备接收基站发送的指示下行接收的下行控制信息; 其中, 该 下行控制信息包括指示用户设备是否发送非周期的探测参考信号、 以及 在发送非周期的探测参考信号时, 所使用的资源的指示信息; 并且该基 站利用所述下行控制信息的填充比特来承载所述指示信息;
该用户设备根据该指示信息进行非周期的探测参考信号的发送。 根据本发明实施例的另一个方面提供了一种基站, 该基站包括: 信息生成单元, 该信息生成单元用于生成指示下行接收的下行控制 信息, 该下行控制信息包括指示用户设备是否发送非周期的探测参考信 号、 以及在发送该非周期的探测参考信号时, 所使用的资源的指示信息; 并且利用该下行控制信息的填充比特来承载该指示信息; 信息发送单元, 该信息发送单元用于向用户设备发送该下行控制信 息, 以使该用户设备根据该下行控制信息中包含的指示信息进行非周期 的探测参考信号的发送。
根据本发明实施例的另一个方面提供了一种用户设备, 该用户设备 包括:
信息接收单元, 该信息接收单元用于接收基站发送的指示下行接收 的下行控制信息; 其中, 该下行控制信息包括指示用户设备是否发送非 周期的探测参考信号、 以及在发送非周期的探测参考信号时, 所使用的 资源的指示信息; 并且该基站利用该下行控制信息的填充比特来承载该 指示信息;
信息处理单元, 该信息处理单元用于根据该信息接收单元接收的该 指示信息进行非周期的探测参考信号的发送。
根据本发明实施例的另一个方面提供了一种计算机可读程序, 其中 当在基站中执行该程序时, 该程序使得计算机在该基站中执行上述探测 参考信号的发送方法。
根据本发明实施例的另一个方面提供了一种存储有计算机可读程序 的存储介质, 其中该计算机可读程序使得计算机在基站中执行上述探测 参考信号的发送方法。
根据本发明实施例的另一个方面提供了一种计算机可读程序, 其中 当在用户设备中执行该程序时, 该程序使得计算机在该用户设备中执行 上述探测参考信号的发送方法。
根据本发明实施例的另一个方面提供了一种存储有计算机可读程序 的存储介质, 其中该计算机可读程序使得计算机在用户设备中执行上述 探测参考信号的发送方法。
本发明实施例的有益效果在于:基站通过利用指示下行 PDSCH接收 的下行控制信息, 如 DCI format 1A中的填充比特来发送指示信息, 以使 用户设备 UE进行非周期探测参考信号 SRS的发送, 从而可使用户设备 及时发送该非周期的探测参考信号, 既可有效地利用 DCI format 1A中的 填充比特, 又可减少用户设备盲检测次数, 避免用户设备复杂度的增加 和误警概率的增加。 参照后文的说明和附图, 详细公开了本发明的特定实施方式, 指明 了本发明的原理可以被采用的方式。 应该理解, 本发明的实施方式在范 围上并不因而受到限制。 在所附权利要求的精神和条款的范围内, 本发 明的实施方式包括许多改变、 修改和等同。
针对一种实施方式描述和 /或示出的特征可以以相同或类似的方式在 一个或更多个其它实施方式中使用, 与其它实施方式中的特征相组合, 或替代其它实施方式中的特征。
应该强调, 术语 "包括 /包含"在本文使用时指特征、 整件、 歩骤或 组件的存在, 但并不排除一个或更多个其它特征、 整件、 歩骤或组件的 存在或附加。 附图说明
从以下结合附图的详细描述中, 本发明实施例的上述以及其他目的、 特征和优点将变得更加显而易见, 在附图中:
图 1是本发明实施例 1的非周期的探测参考信号的发送方法流程图; 图 2是本发明实施例 2的非周期的探测参考信号的发送方法流程图; 图 3是本发明实施例 3 的基站侧非周期的探测参考信号的发送方法 流程图;
图 4是本发明实施例 3的用户设备侧非周期的探测参考信号的发送 方法流程图;
图 5是本发明实施例 4的基站的结构示意图;
图 6是本发明实施例 5的基站的结构示意图;
图 7是本发明实施例 6的基站的结构示意图;
图 8是本发明实施例 7的用户设备的结构示意图;
图 9是本发明实施例 7的信息处理单元的构成示意图;
图 10是本发明实施例 7的信息处理单元的构成示意图。 具体实施方式
下面结合附图对本发明的各种实施方式进行说明。 这些实施方式只 是示例性的, 不是对本发明的限制。 为了使本领域的技术人员能够容易 地理解本发明的原理和实施方式, 本发明的实施方式以在 10MHz宽带下 增强的长期演进 (Long Term Evaluation Advanced, LTE-A)、 频分双工 (Frequency Division Duplexing, FDD)系统为例进行说明, 但可以理解, 本发明并不限于上述带宽和上述系统, 对于涉及非周期的 SRS发送的其 他带宽的系统均适用。
图 1是本发明实施例 1 中探测参考信号的发送方法流程图。 如图 1 所示, 该方法包括:
歩骤 101, 基站生成指示下行接收的下行控制信息 DCI , 该下行控制 信息包括指示用户设备 UE是否发送非周期的探测参考信号、 以及在发送 该非周期的探测参考信号时, 所使用的资源的指示信息; 并且利用该下 行控制信息 DCI的填充比特来承载该指示信息;
歩骤 102, 该基站向用户设备 UE发送该下行控制信息 DCI , 以使该 用户设备 UE根据该下行控制信息 DIC中包含的指示信息进行非周期的探 测参考信号 SRS的发送。
在 LTE-A系统中, 如背景技术所述, 为提高上行信道信息的及时性 及准确性, 可以通过调度上行 PUSCH发送的下行控制信令 (DCI), 如 DCI format 0和 DCI format 4来指示用户设备 UE进行非周期的探测参考 信号 SRS的发送, 并在指示该用户设备 UE发送非周期的探测参考信号 SRS时, 指示发送该非周期的探测参考信号 SRS所使用的资源信息。
此外,为了进一歩增加用户设备 UE发送非周期的探测参考信号 SRS 机会,并为下行 PDSCH发送提供辅助的信道信息,可在指示下行 PDSCH 接收的 DCI中增加非周期探测参考信号 SRS的触发功能, 同时, 指示发 送非周期的探测参考信号 SRS的资源信息。
在本发明实施例中, 该下行控制信息可采用格式为 1A的下行控制信 息, 但不限于上述下行控制信息, 还可以为其他的指示下行 PDSCH接收 的下行控制信息。 以下以格式为 1A的下行控制信息为例进行说明。
表 1示出了 10MHz宽带配置下, LTE FDD系统中 DCI format 0的承 载信息及长度; 其中, 3bit载波指示在用户专用搜索空间中可配置, lbit 非周期 SRS请求在用户专用搜索空间中可配置, 2bit非周期 CQI请求在用 户专用搜索空间中可配置, 在公共搜索空间中或单载波时仅配置为 lbit。 表 2示出了 10MHz宽带配置下, LTE FDD系统中 DCI format 1A的承载 信息及长度。
Figure imgf000008_0001
在 LTE系统中, 规定负载 (payload) 较为接近的指示下行 PDSCH 接收的下行控制信息 DCI format 1A与 DCI format 0通过增加填充比特的 方式, 达到相同的长度。
在 LTE-A系统中,为避免增加盲检次数, DCI format 1A与 DCI format 0需保持相同的长度。 这样, 在 LTE-Advanced系统中, DCI format 1A需 至少增加 2 比特以实现与 DCI format 0相同长度, 这样, 新增的比特为 填充比特, 在现有技术中该填充的比特没有被利用。
在本发明实施例中,利用指示下行 PDSCH接收的下行控制信息,如 DCI format 1A 中新增的填充比特来承载用于指示非周期探测参考信号 SRS的触发、 以及指示发送非周期的探测参考信号 SRS的资源信息的指 示信息。 这样, 既有效利用了填充比特, 又可使用户设备能够及时发送 非周期的探测参考信号 SRS,减少了用户设备对下行控制信号 PDCCH的 盲检测次数, 避免了用户设备复杂度的增加和误警概率的增加。
表 3示出了 10MHz宽带配置下, 本发明实施例的 LTE-A FDD系统 中 DCI format 1A的承载信息及长度。 表 3
Figure imgf000009_0001
以下以表 3所示的在 10MHz宽带配置下, LTE-A FDD系统中利用指 示下行 PDSCH接收的 DCI format 1A中的填充的 2比特触发非周期探测 参考信号的发送并指示发送该非周期探测参考信号所使用的资源为例来 对本发明实施例的非周期的探测参考信号的发送方法进行说明。 需要说 明的是利用 DCI format 1A中的填充比特触发非周期的 SRS的发送仅为本 发明实施例,还可利用指示下行 PDSCH接收的其他格式的下行控制信息 触发非周期的 SRS的发送。
在本实施例中, 在歩骤 101 中, 该基站可根据传输模式和系统要求 生成相应的下行控制信息 DCI , 与现有技术类似此处不再赘述; 其中, 利 用 DCI format 1A中的填充比特来触发非周期的探测参考信号 SRS的发 送, 即指示是否发送非周期的探测参考信号 SRS、 以及指示发送非周期的 探测参考信号 SRS的资源信息。
如表 4A所示, 在 DCI format 1A中, 利用填充的 2bit 'ΧΥ' 来承载 该指示信息; 例如, 当 'ΧΥ' = '00' 时, 表示用户设备无需发送非周 期的探测参考信号 SRS; 当 'ΧΥ' = '01 ' 10' 1 时, 表示用户 设备在预定时间发送非周期的探测参考信号 SRS, 并指示发送该非周期 的探测参考信号 SRS所使用的资源。但上述表示方式仅为本发明实施例, 还可采用其他方式来表示上述情况。
在本实施例中, 该基站可预先配置多组资源, 该多组资源中的每一 组资源均包括发送该非周期的探测参考信号所使用的资源信息; 然后将 配置的该多组资源与该 2bit的指示信息对应储存; 并且在指示用户设备 发送非周期的探测参考信号时, 该指示信息中指示用户设备使用的资源 为预先配置的多组资源中的一组; 其中, 该多组资源完全通过高层信令, 如 RRC进行配置。
例如, 在表 4A所示的情况下, 该基站通过 RRC为用户设备 UE配 置三组资源, 每一组资源中均包括发送该非周期的探测参考信号所使用 的资源信息; 并且将该三组资源信息与 2bit指示信息对应储存。 并且在 用户设备 UE侧也储存该对应关系。
表 4A是本发明实施例中 2bit指示信息与对应的资源映射关系表。如 表 4A所示, 当 'ΧΥ' = '00' 时, 表示用户设备无需发送非周期的探测 参考信号 SRS, 无需配置资源; 当 'ΧΥ' = ΌΙ ' 10' 1 时, 相 应地基站为用户设备 UE配置三组资源, 每一种状态对应一组资源。
其中,所配置的资源的数值可根据实际情况来定,此处仅用符号示意。
表 4A
Figure imgf000011_0001
由表 4A可知, 当 'ΧΥ ' = ' 01 ' I, 10 ' I, 1 , 表示用户设备 UE 在预定时间发送非周期的探测参考信号 SRS , 并且还指示使用第几组资 源。 其中, 该用户设备 UE在预定时间发送非周期的 SRS可具体包括: 若用户设备 UE在第 η个子帧接收到包含触发信息的 DCI,则用户在至少 4个子帧后的第一个满足周期及偏移条件的子帧发送非周期 SRS ; 此外, 配置的资源信息可与 DCI format 0/DCI format 4中对应的资源信息相同、 也可以不同。 与周期性的 SRS对应的资源信息相同, 也可以是周期性的 SRS的资源信息的子集。
如表 4A所示, 该资源信息可包括: SRS周期、 SRS偏移、 SRS带 宽 (SRS Bandwidth )、 频域位置(Frequency Domain Position )、 跳频带宽 ( SRS Hopping Bandwidth ) (若支持跳频功能)、 传输梳 (Transmission Comb ) , 循环位移 (Cyclic Shift )、 天线信息, 如天线端口数量 (Number of Antenna Ports )、或者还包括载波信息,如分量载波索引的数量(Number of CC Index ) 等。
在本实施例中,基站将配置的如表 4A所示的映射关系通知用户设备 并在用户设备 UE侧储存, 这样, 当用户设备 UE接收到下行控制信息 DCI 时, 可根据其中的指示信息、 以及预存的指示信息与所使用资源的映射 关系 (如表 4A) 来确定是否发送非周期的探测参考信号 SRS、 以及在发 送非周期的探测参考信号 SRS的情况下, 确定所使用的资源。
在上述实施例中, 该基站配置的发送非周期的探测参考信号 SRS所 使用的资源信息可包括发送该非周期的探测参考信号 SRS所需要的全部 资源信息。
此外, 为了进一歩减小信令开销, 考虑到在基站通过高层信令配置 的资源信息中, 有些资源信息是发送周期的探测参考信号 SRS和非周期 的探测参考信号 SRS时所共享的, 而基站一般通过高层信令配置了周期 性发送的 SRS所使用的全部资源信息, 因此, 在基站通过高层信令配置 发送非周期的探测参考信号 SRS所使用的资源信息时, 可不配置这些共 享资源, 这样, 该基站配置的多组资源中的每一组资源中所包括的发送 该非周期的探测参考信号 SRS所使用的资源信息为基站通过高层信令配 置的周期性的发送探测参考信号 SRS所使用的资源信息的一个子集。 这 样, 用户设备 UE可根据基站通过高层配置的发送非周期的 SRS所使用的 资源、 预存的共享资源来发送非周期的 SRS。
表 4B是本发明实施例中 2bit指示信息与对应的资源映射关系表。其 中, 基站所配置的发送非周期的 SRS所使用的资源为发送周期的 SRS所 使用资源的子集。
表 4B
Figure imgf000012_0001
例如, 若该表 4B中包括发送非周期的 SRS所需要的全部资源的一部 分资源, 即不包括共享资源, 如 SRS周期、 SRS偏移, 则在确定发送非 周期的 SRS 的情况下, 可根据该指示信息、 预存的指示信息与所使用资 源的映射关系 (如表 4B) 来确定发送非周期的 SRS所使用的资源, 然后 该用户设备 UE利用确定的资源和预存的共享资源来发送非周期的 SRS。
此外, 除了上述通过高层信令配置发送非周期的探测参考信号 SRS 所使用的资源信息外, 在本发明实施例中, 还可采用如下方式配置发送 非周期的探测参考信号 SRS的所使用的资源。 该基站配置一组发送该非周期的探测参考信号 SRS所使用的资源信 息中的部分资源信息, 该部分资源信息可由基站通过高层信令, 如 RRC 进行配置; 然后将配置的该部分资源信息进行储存, 并且也在用户设备 UE侧进行储存;
其中, 该部分资源信息可为用户设备 UE发送非周期的探测参考信号 SRS所需要的资源信息中的一部分, 即是发送非周期的探测参考信号 SRS 所需要的资源信息的子集; 此外, 基站还配置除了该部分资源信息以外 的发送该非周期的探测参考信号所需要的资源; 其中, 该资源包括除了 高层信令配置的部分资源信息以外的资源的其中之一或之几, 视情况而 定; 并且基站将该高层信令配置的部分资源信息以外的资源与相应的指 示信息对应储存, 并且在用户设备 UE侧也储存该对应关系。 并且, 在指 示用户设备发送非周期的探测参考信号时, 该指示信息中指示用户设备 使用的资源为除了该部分资源以外的发送该非周期的探测参考信号所需 要的资源。
由上述可知,用户设备 UE发送非周期的探测参考信号 SRS所使用的 信息可部分通过高层信令配置, 部分通过指示信息, 如表 3所示的 2bit
'ΧΥ' 来动态配置。 这样, 可减小高层信令的开销, 更加灵活地发送非 周期的探测参考信号 SRS, 减小用户设备 UE之间的碰撞概率。其中, 动 态配置的资源信息可以包括天线信息, 载波信息, 循环位移其中之一或 之几, 但不限于此, 可根据实际情况来确定动态配置的资源。
表 5是本发明实施例中动态配置天线端口数量 (Number of antenna ports) 与指示信息的映射关系表。 表 6 是本发明实施例中分量载波索引
(Index of component carriers) 与指示信息的映射关系表。 表 7是本发明 实施例中循环位移 (Cyclic shift) 与指示信息的映射关系表。 表 5
Figure imgf000013_0001
表 6
Figure imgf000014_0001
上述实施例是以动态指示一种资源信息为例进行了说明, 此外, 还 可动态指示上述资源中的一种或几种, 此处不再赘述。
在本实施例中,在动态指示资源的情况下,基站将配置的表 5或表 6 或表 7所示的映射关系、 以及通过高层配置的一组部分资源信息均通知 用户设备 UE并在用户设备 UE侧储存, 这样, 当用户设备 UE接收到下行 控制信息 DCI 时, 可根据其中的指示信息来确定是否发送非周期的探测 参考信号 SRS、 以及在发送非周期的探测参考信号 SRS的情况下, 根据该 指示信息、 以及预存的指示信息与所使用资源的映射关系(如表 5或表 6 或表 7 ) 确定动态分配的资源信息, 并且该用户设备 UE利用动态分配的 资源信息与预测的由高层信令配置的部分资源信息发送非周期的探测参 考信号 SRS。
在上述实施例中, 该部分资源信息中包括发送周期的探测参考信号 SRS和非周期的探测参考信号 SRS时所共享的资源。
此外, 为了进一歩减小信令开销, 也可不包括上述共享的资源, 而 将该共享资源由基站预先并通知用户设备, 储存在基站侧和用户设备侧, 供用户设备 UE使用, 与上述资源配置情况类似。 例如, 在该部分资源信息中不包括发送周期的探测参考信号 SRS和 非周期的探测参考信号 SRS时所共享的资源的情况下, 该共享资源可由 基站预先配置并通知用户设备且在用户设备侧储存, 这样, 当用户设备 UE接收到下行控制信息 DCI时, 在确定发送非周期的探测参考信号的情 况下, 可根据其中的指示信息、 预存的指示信息与所使用资源的映射关 系 (如表 5或表 6或表 7 ) 来确定所使用的资源, 然后利用确定的资源、 预先配置的一组部分资源信息 (不包含共享资源)、 以及预存的该共享资 源来发送非周期的探测参考信号 SRS。
由上述实施例可知, 基站通过利用指示下行 PDSCH 接收的 DCI format 1A中的填充比特来发送指示信息, 以使用户设备 UE进行非周期 探测参考信号 SRS的发送, 从而可使用户设备及时发送该非周期的探测 参考信号, 有效地利用 DCI format 1A中的填充比特; 此外还可减少用户 设备盲检测次数, 避免用户设备复杂度的增加和误警概率的增加; 另外, 通过共享发送周期的 SRS所使用的资源、 或者采用动态配置资源, 可减 少高层信令开销, 更加灵活地发送非周期的探测参考信号 SRS , 减小用 户设备 UE之间的碰撞概率。
图 2是本发明实施例 2的探测参考信号的发送方法流程图。 如图 2 所示, 该方法包括:
歩骤 201, 用户设备 UE接收基站发送指示下行接收的的下行控制信 息 DCI ; 其中, 该下行控制信息 DCI包括指示用户设备 UE是否发送非周 期的探测参考信号、 以及在发送非周期的探测参考信号时, 所使用的资 源的指示信息; 并且该基站利用该下行控制信息的填充比特来承载该指 信息;
歩骤 202, 该用户设备 UE根据该指示信息进行非周期的探测参考信 号 SRS的发送。
在本发明实施例中,该指示下行接收的下行控制信息的格式可为 1Α, 但不限于上述下行控制信息, 还可以为其他的指示下行 PDSCH接收的下 行控制信息。 以下以格式为 1A的下行控制信息为例进行说明。
由上述实施例可知, 基站通过利用指示下行 PDSCH 接收的 DCI format 1A中的填充比特来发送指示信息, 以使用户设备 UE进行非周期 探测参考信号 SRS的发送, 从而可使用户设备及时发送该非周期的探测 参考信号, 有效地利用 DCI format 1A中的填充比特; 此外还可减少用户 设备盲检测次数, 避免用户设备复杂度的增加和误警概率的增加。
在本实施例中, 基站通过高层信令配置发送非周期的探测参考信号 SRS所使用的资源信息,并通知用户设备 UE且在用户设备 UE侧预先储存 基站通过高层配置的资源信息。
在这种情况下, 在歩骤 202中, 用户设备 UE根据该指示信息进行非 周期的探测参考信号的发送, 可具体包括: 若该用户设备确定该指示信 息为发送非周期的探测参考信号的指示信息, 则该用户设备根据该指示 信息、 以及预存的指示信息和资源的第一映射关系来确定发送该非周期 的探测参考信号所使用的资源; 该用户设备利用确定的该资源发送该非 周期的探测参考信号。 其中, 该第一资源映射关系为该基站配置的多组 资源与指示信息的对应关系 (如表 4A所示); 其中, 该多组资源中的每 一组资源均包括发送所述非周期的探测参考信号所使用的资源信息。
例如, 如表 4A所示, 当用户设备 UE接收到的指示信息为 'ΧΥ ' = ' 00 ' 时, 用户设备 UE通过表 4Α可知, 不发送非周期的探测参考信号 SRS , 不需资源; 当用户设备 UE接收到 'ΧΥ ' = ' 01 ' I, 10 ' 1 时, 可确定需要在预定时间发送非周期的探测参考信号 SRS , 并根据预 先储存的第一映射关系表, 如表 4Α查找相应的资源, 其中, 每一种状态 对应一组资源。这样, 该用户设备 UE可利用预先配置的资源发送非周期 的探测参考信号 SRS。
以上是以基站通过高层配置发送非周期的探测参考信号 SRS所使用 的全部资源为例进行了说明。 为了进一歩减小信令开销, 由基站配置的 该资源中也可不包括上述共享的资源, 该第一映射关系可采用如表 4B所 示的映射关系, 这样, 该用户设备根据该指示信息、 以及预存的如表 4B 所示的映射关系来确定发送该非周期的探测参考信号所使用的资源; 该 用户设备利用确定的该资源、 以及预先配置的共享资源发送该非周期的 探测参考信号。
此外, 在本实施例中, 为了进一歩减小高层信令开销, 还可动态配 置资源, 具体的配置方式如实施例 1所示, 此处不再赘述。 在这种情况下, 在用户设备 UE侧预先储存基站通过高层配置的发 送非周期的探测参考信号 SRS的部分资源信息, 并且还储存该部分资源 信息以外的资源与指示信息的映射关系表, 如表 5〜表 7所示。 其中, 该 部分资源信息为发送非周期的探测参考信号 SRS所使用的资源信息的子集。
这样, 在歩骤 202中, 用户设备 UE根据该指示信息进行非周期的探 测参考信号的发送, 可具体包括:
若该用户设备 UE确定该指示信息为发送非周期的探测参考信号的指 示信息, 则该用户设备根据该指示信息、 以及预存的指示信息和资源的 第二映射关系确定发送该非周期的探测参考信号所使用的资源; 用户设 备 UE利用预先配置的资源、 以及确定的资源来发送该非周期的探测参考 信号。 其中, 该第二映射关系为除了基站配置的发送该非周期的探测参 考信号所使用的资源中的部分资源信息以外的发送该非周期的探测参考 信号所需要的资源与指示信息的对应关系 (表 5或表 6或表 7)。
例如, 如表 5所示, 当用户设备接收到的指示信息为 'ΧΥ' = '00' 时, 用户设备 UE通过表 5可知, 不发送非周期的探测参考信号 SRS, 不 需天线; 当用户设备接收到 'ΧΥ' = OV 10' 1 时, 根据表 5 查找相应的天线信息, 其中, 'ΧΥ' = O 时, 利用 1根天线发送非周 期的探测参考信号 SRS; 当 'ΧΥ' = ' 10' 时, 利用 2根天线发送非周 期的探测参考信号 SRS; 当 'ΧΥ' = ' I V 时, 利用 4根天线发送非周 期的探测参考信号 SRS。这样, 该用户设备 UE可利用高层配置的部分资 源以及由该指示信息 'ΧΥ' 指示的资源来发送非周期的探测参考信号 SRS。
例如, 如表 6所示, 当用户设备接收到的指示信息为 'ΧΥ' = '00' 时, 用户设备 UE通过表 6可知, 不发送非周期的探测参考信号 SRS, 不 使用分量载波 CC; 当用户设备接收到 'ΧΥ' = OV 时, 表示在 DCI 1A 所指示的下行 CC对应的上行 CC上发送非周期的探测参考信号 SRS; 当 'ΧΥ' = ' 10' 时, 表示在索引号为 "Μ" 的上行 CC上发送非周期的 探测参考信号 SRS , 其中 " Μ"可由高层信令 RRC进行配置; 当 'ΧΥ' = ' I V 时, 表示在索引号为 "Ν"的上行 CC上发送非周期的探测参考 信号 SRS , 其中 "Ν"可由高层信令 RRC进行配置。 这样, 该用户设备 UE 可利用高层配置的部分资源以及由该指示信息 'ΧΥ' 指示的资源来 发送非周期的探测参考信号 SRS。
例如, 如表 7所示, 当用户设备接收到的指示信息为 'ΧΥ' = '00' 时, 用户设备 UE通过表 7可知, 不发送非周期的探测参考信号 SRS, 不 进行循环位移 CS; 当用户设备接收到 'ΧΥ' = '01 ' 时, 表示用索引号 为 "L"的循环位移 CS发送非周期的探测参考信号 SRS; 当 'ΧΥ' = ' 10' 时,表示用索引号为" Μ"的循环位移 CS发送非周期的探测参考信号 SRS; 当 'ΧΥ' = ' \ \ ' 时, 表示在索引号为 "Ν"的循环位移 CS发送非周期 的探测参考信号 SRS , 其中 "L、 M、 N"可由高层信令 RRC进行配置。 这样, 该用户设备 UE 可利用高层配置的部分资源以及由该指示信息 'ΧΥ' 指示的资源来发送非周期的探测参考信号 SRS。
以上表 5〜表 7所示的仅为本发明实施例的情况, 但不限于此, 还可 动态配置其他信息, 可根据实际情况来确定。 这样, 通过采用动态配置 资源,可减少高层信令开销,更加灵活地发送非周期的探测参考信号 SRS , 减小用户设备 UE之间的碰撞概率。
以上实施例是以基站配置的部分资源中包括发送周期的探测参考信 号 SRS和非周期的探测参考信号 SRS时所共享的资源的情况为例进行的 说明。
此外, 为了进一歩减小信令开销, 由基站配置的该部分资源中也可 不包括上述共享的资源, 而将该共享资源预先储存在基站侧和用户设备 侧, 供用户设备 UE使用。 这样, 在歩骤 202中, 用户设备 UE根据该指 示信息进行非周期的探测参考信号的发送, 可具体包括:
若该用户设备 UE确定该指示信息为发送非周期的探测参考信号的指 示信息, 则该用户设备根据该指示信息、 预存的指示信息和资源的第二 映射关系确定发送非周期的 SRS所使用的部分资源; 该用户设备利用确 定的资源、 预存的由基站配置的部分资源、 以及预存的共享资源来发送 该非周期的探测参考信号 SRS。
以下参照附图 3和图 4以在 10MHz宽带配置下, LTE-A FDD系统中 利用指示下行接收的下行控制信息, 如 DCI format 1A中的填充的 2比特 触发非周期探测参考信号的发送并指示发送该非周期探测参考信号所使 用的资源为例来对本发明实施例的非周期的探测参考信号的发送方法进 行说明。
图 3是本发明实施例 3的基站侧探测参考信号的发送方法流程图。 如图 3所示, 该方法包括:
歩骤 301, 基站根据功能的不同构建相应的 DCI源比特;
其中, 可根据传输模式及系统需求, 生成相应的 DCI源比特, 其中, 生成 DCI源比特的过程与现有技术类似, 此处不再赘述;
其中, 生成指示下行接收的 DCI, 该 DCI的格式为 1A, 使用该 DCI format 1A中填充的 2bit承载指示信息,该指示信息如实施例 1和 2所述, 此处不再赘述。
歩骤 302,该基站对生成的该 DCI源比特添加循环冗余校验码 ( Cyclic
Redundancy Check, CRC)。
歩骤 303, 对添加 CRC的 DCI源比特进行调制编码和速率匹配。 歩骤 304, 形成物理控制信道 (Physical Downlink Control Channel,
PDCCH) , 映射到相应的物理时频资源上, 并通过 PDCCH 向用户设备
UE发送。
图 4是本发明实施例 3的用户设备侧探测参考信号的发送方法流程 图。 如图 4所示, 该方法包括:
首先用户设备 UE, 根据传输模式检测可能的 DCI, 然后根据检测到 的 DCI确定是否发送非周期的 SRS, 具体包括:
歩骤 401, 用户在相应的时频资源上接收 PDCCH。
歩骤 402, 进行解速率匹配, 解调译码。
歩骤 403, 判断 CRC校验是正确还是错误; 若判断结果为正确, 则 执行歩骤 404, 否则执行歩骤 407。
歩骤 404, 在歩骤 403中判断结果为 CRC校验正确, 则进一歩判断 是否发送非周期的 SRS; 若判断结果为发送, 则执行歩骤 405, 否则执行 歩骤 409;
其中, 可通过判断 2 比特的指示信息的状态判断是否发送非周期的 SRS; 例如, 若 2bit 'ΧΥ' = '00', 则可确定不发送非周期的 SRS; 若 2bit 'ΧΥ' 不等于 '00', 则可确定在预定时间发送非周期的 SRS; 其中, 在预定时间发送非周期的 SRS可具体包括: 若用户设备 UE在第 n个子帧接收到包含触发信息的 DCI, 则用户 在至少 4个子帧后的第一个满足周期及偏移条件的子帧发送非周期 SRS。
歩骤 405, 在歩骤 404中, 若判断结果为发送非周期的 SRS, 则该用 户设备 UE可根据 2bit的指示信息来确定使用的资源;
其中, 若基站通过高层配置了发送非周期的 SRS的全部资源, 则该 用户设备 UE可根据该 2bit的指示信息查找表 4A, 找到该指示信息对应 的资源; 如实施例 1和 2所述, 此处不再赘述;
此外, 若基站通过高层配置了发送非周期的 SRS的部分资源, 则该 用户设备 UE可根据该 2bit 的指示信息查找表 5或表 6或表 7,找到该指 示信息对应的部分资源; 然后确定发送非周期的 SRS的资源为预存的基 站通过高层配置的部分资源(如表 4B)、 以及根据该指示信息查表(表 5 或表 6或表 7) 找到的部分资源;
另外,对于基站配置的资源中不包括共享资源的情况如实施例 1和 2 所述, 此处不再赘述。
歩骤 406, 用户设备 UE利用确定的资源在预定时间发送该非周期的
SRS;
此外, 还可接收相应的 PDSCH。
歩骤 407, 在歩骤 403中, 若 CRC校验错误, 则进一歩确定是否超 过最大盲检次数, 若确定结果为是, 则执行歩骤 408; 否则回到歩骤 401。
歩骤 408, 在歩骤 407中, 若判断结果为是, 则丢弃该 PDCCH, 过 程结束。
歩骤 409, 在歩骤 404中, 若判断结果为不发送非周期的 SRS, 则该 用户设备 UE不发送非周期的 SRS;
其中, 可根据通过判断 2 比特的指示信息的状态判断是否发送非周 期的 SRS; 例如, 若 2bit 'ΧΥ' = '00', 则可确定不发送非周期的 SRS; 在确定不发送非周期的 SRS的情况下, 该用户设备还可接收相应的 PDSCH。
由上述实施例可知, 基站通过利用指示下行 PDSCH 接收的 DCI format 1A中的填充比特来发送指示信息, 以使用户设备 UE进行非周期 探测参考信号 SRS的发送, 从而可使用户设备及时发送该非周期的探测 参考信号, 有效地利用 DCI format 1A中的填充比特; 此外还可减少用户 设备盲检测次数, 避免用户设备复杂度的增加和误警概率的增加。 通过 采用动态配置资源, 可减少高层信令开销, 更加灵活地发送非周期的探 测参考信号 SRS , 减小用户设备 UE之间的碰撞概率。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分 歩骤是可以通过程序来指令相关的硬件完成, 所述的程序可以存储于一 计算机可读取存储介质中, 该程序在执行时, 可以包括上述实施例方法 中的全部或部分歩骤, 所述的存储介质可以包括: ROM、 RAM, 磁盘、 光盘等。
本发明实施例还提供了一种基站和用户设备, 如下面的实施例所述。 由于该基站和用户设备解决问题的原理与上述基于基站和用户设备的非 周期的探测参考信号的发送方法相似, 因此该基站和用户设备的实施可 以参见方法的实施, 重复之处不再赘述。
图 5是本发明实施例 4的基站的结构示意图。 如图 5所示, 该基站 包括: 信息生成单元 501和信息发送单元 502; 其中,
信息生成单元 501,用于生成指示下行接收的下行控制信息,该下行 控制信息包括指示用户设备是否发送非周期的探测参考信号、 以及在发 送非周期的探测参考信号时, 所使用的资源的指示信息; 并且利用下行 控制信息的填充比特来承载指示信息;
信息发送单元 502,用于向用户设备发送下行控制信息, 以使用户设 备根据下行控制信息中包含的指示信息进行非周期的探测参考信号的发送。
在上述实施例中, 信息生成单元 501可采用图 3所示的方法, 此处 不再赘述。
在本发明实施例中, 该下行控制信息的格式可为 1A, 但不限于上述 下行控制信息, 还可以为其他的指示下行 PDSCH接收的下行控制信息。 由上述实施例可知,基站通过利用指示下行 PDSCH接收的 DCI format 1A 中的填充比特来发送指示信息,以使用户设备 UE进行非周期探测参考信 号 SRS的发送, 从而可使用户设备及时发送该非周期的探测参考信号, 有效地利用 DCI format 1A中的填充比特; 此外还可减少用户设备盲检测 次数, 避免用户设备复杂度的增加和误警概率的增加。 图 6是本发明实施例 5的基站的结构示意图。 如图 6所示, 该基站 包括: 信息生成单元 601和信息发送单元 602, 其作用与实施例 4类似, 此处不再赘述。
此外, 该基站还可包括第一资源配置单元 603和第一映射关系存储 单元 604; 其中,
第一资源配置单元 603,用于配置多组资源, 多组资源中的每一组资 源包括发送非周期的探测参考信号所使用的资源信息;
第一映射关系存储单元 604,用于将配置的多组资源与相应的指示信 息对应储存;
并且在指示用户设备发送非周期的探测参考信号时, 指示信息中指 示用户设备使用的资源为预先配置的多组资源中的一组。
由上述可知, 基站可通过高层信令, 如 RRC配置发送非周期的探测 参考信号所使用的资源信息, 并将该资源与指示信息对应储存, 如表 4A 所示。
在上述实施例中, 第一资源配置单元 603配置的多组资源中的每一 组资源中所包括的发送非周期的探测参考信号所使用的资源信息可以为 是基站配置的发送周期的探测参考信号的全部资源信息(如表 4A ) , 也可 以是该全部资源信息的子集(如表 4B)。 如实施例 1-3所述, 此处不再赘 述。
图 7是本发明实施例 6的基站的结构示意图。 如图 7所示, 该基站 包括: 信息生成单元 701和信息发送单元 702, 其作用与实施例 4类似, 此处不再赘述。
此外, 基站还包括: 第二资源配置单元 703、存储单元 704和第三资 源配置单元 705 ; 其中,
第二资源配置单元 703,用于配置一组发送非周期的探测参考信号所 使用的资源中的部分资源信息;
存储单元 704, 用于储存第二资源配置单元配置的部分资源信息; 第三资源配置单元 705,用于配置多组除了部分资源信息以外的发送 非周期的探测参考信号所需要的资源;
第二映射关系存储单元 706,用于将配置的多组除了部分资源信息以 外的发送非周期的探测参考信号所需要的资源与相应的指示信息对应储存; 并且, 在指示用户设备发送非周期的探测参考信号时, 指示信息中 指示用户设备使用的资源为除了部分资源信息以外的发送非周期的探测 参考信号所需要的资源。
在上述实施例中, 第二资源配置单元 703配置的部分资源为发送非 周期的探测参考信号所使用的资源信息的子集。 具体如实施例 1至 3所 述, 此处不再赘述。
在本实施例中, 该基站还可包括信息通知单元(未示出), 该信息通 知单元用于将第一资源配置单元 603、第二资源配置单元 703或第三资源 配置单元 705配置的资源信息通知该用户设备。
由上述可知, 为了减少高层信令的开销, 基站不配置与发送周期的 SRS共享的资源 (如表 4B)、 或者仅通过高层信令配置发送非周期的探测 参考信号的部分资源信息, 其他的资源信息由指示信息动态分配, 即可 根据指示信息从表 5〜表 7所示的资源中确定。
由上述实施例可知, 基站通过利用指示下行 PDSCH 接收的 DCI format 1A中的填充比特来发送指示信息, 以使用户设备 UE进行非周期 探测参考信号 SRS的发送, 从而可使用户设备及时发送该非周期的探测 参考信号, 有效地利用 DCI format 1A中的填充比特; 此外还可减少用户 设备盲检测次数, 避免用户设备复杂度的增加和误警概率的增加。 此外, 通过不配置与发送周期的 SRS共享的资源减少高层信令开销; 或者通过 指示信息动态指示资源, 既可较少高层信令开销, 又可灵活的发送非周 期的 SRS , 较小用户设备 UE之间的碰撞概率。
图 8是本发明实施例 7的用户设备的结构示意图。 如图 8所示, 该 用户设备 UE包括: 信息接收单元 801和信息处理单元 802 ; 其中,
信息接收单元 801, 用于接收基站发送指示下行接收的下行控制信 息; 其中, 下行控制信息包括指示用户设备是否发送非周期的探测参考 信号、 以及在发送非周期的探测参考信号时, 所使用的资源的指示信息; 并且基站利用下行控制信息的填充比特来承载指示信息;
信息处理单元 802,用于根据信息接收单元 801接收的指示信息进行 非周期的探测参考信号的发送。 在本发明实施例中, 该下行控制信息的格式可为 1A, 但不限于上述 下行控制信息, 还可以为其他的指示下行 PDSCH接收的下行控制信息。
由上述实施例可知, 用户设备接收基站通过指示下行 PDSCH接收的 DCI format 1A中的填充比特来发送的指示信息, 根据该指示信息进行非 周期探测参考信号 SRS的发送, 从而可使用户设备及时发送该非周期的 探测参考信号, 有效地利用 DCI format 1A中的填充比特; 此外还可减少 用户设备盲检测次数, 避免用户设备复杂度的增加和误警概率的增加。
图 9是本发明实施例 7中信息处理单元的构成示意图。如图 9所示, 该信息处理单元 802包括:
第一判断单元 901,用于判断指示信息是否为发送非周期的探测参考 信号的指示信息;
第一资源确定单元 902,用于在第一判断单元的判断结果为是时,根 据指示信息、 以及预存的指示信息和资源的第一映射关系来确定发送非 周期的探测参考信号所使用的资源;
第一信号发送单元 903,用于利用第一资源确定单元 902确定的资源 发送非周期的探测参考信号; 或者利用第一资源确定单元 902 确定的资 源和预存的资源来发送该非周期的探测参考信号,具体情况如实施例 1-3 所述, 此处不再赘述。
此外,该信息处理单元 802还可包括第一存储单元 904,用于储存指 示信息和资源的第一映射关系, 如表 4A所示。 其中, 若基站配置了发送 该非周期的 SRS所使用的全部资源信息, 则第一信号发送单元 903, 用于 利用第一资源确定单元 902 确定的资源发送非周期的探测参考信号。 若 基站配置了发送该非周期的 SRS所使用的全部资源信息的子集, 即不配 置共享资源, 如表 4B所示, 则第一信号发送单元 903利用第一资源确定 单元 902 确定的资源和预存的资源来发送该非周期的探测参考信号, 具 体情况如实施例 1-3所述, 此处不再赘述。
图 10是本发明实施例 7中信息处理单元的构成示意图。 如图 10所 示, 该信息处理单元 802包括:
第二判断单元 1001, 用于判断指示信息是否为发送非周期的探测参 考信号的指示信息; 第二资源确定单元 1002,用于在第二判断单元 1001的判断结果为是 时, 根据指示信息、 以及预存的指示信息和资源的第二映射关系确定发 送非周期的探测参考信号所使用的资源;
第二信号发送单元 1003, 用于利用预存的资源、 以及第二资源确定 单元 1002确定的资源来发送非周期的探测参考信号。
此外, 该信息处理单元 802还可包括第二存储单元 1004, 用于储存 指示信息和资源的第二映射关系, 如表 5〜表 7所示; 还可包括第三存储 单元 1005, 用于储存基站通过高层信令配置的部分资源。 其中, 若基站 预先配置了一组发送该非周期的 SRS所使用的资源信息中的部分资源信 息, 且该部分资源信息中包括与发送周期的 SRS所共享的资源时, 则第 二信号发送单元 1003,用于利用预存的资源(基站预先配置的一组资源)、 以及第二资源确定单元 1002确定的资源来发送非周期的探测参考信号。
若基站配置了一组发送该非周期的 SRS所使用的资源信息中的部分 资源信息, 且该部分资源信息中不包括上述共享资源时, 则第二信号发 送单元 1003, 用于利用预存的资源 (预存的基站配置的一组资源和预存 的共享资源)、 以及第二资源确定单元 1002确定的资源来发送非周期的 探测参考信号具体情况如实施例 1-3所述, 此处不再赘述。
在上述实施例中,该用户设备还可包括资源信息接收单元(未示出), 用于接收基站发送的预先配置的资源信息, 并将接收到的资源信息进行 储存, 如储存到第一存储单元 904、 第二存储单元 1004或第三存储单元 1005。
由上述实施例可知,用户设备接收基站利用 DCI format 1A中的填充 比特来发送的指示信息, 根据该指示信息进行非周期探测参考信号 SRS 的发送, 从而可使用户设备及时发送该非周期的探测参考信号; 此外还 可减少用户设备盲检测次数, 避免用户设备复杂度的增加和误警概率的 增加。 此外, 不配置与发送周期的 SRS共享的资源减少高层信令开销; 通过指示信息动态指示资源, 既可较少高层信令开销, 又可灵活的发送 非周期的 SRS , 较小用户设备 UE之间的碰撞概率。
在本实施例中还提供一种计算机可读程序, 其中当在基站中执行程 序时, 程序使得计算机在基站中执行如实施例 1或 3所述的探测参考信 号的发送方法。
本发明实施例还提供一种存储有计算机可读程序的存储介质, 其中 计算机可读程序使得计算机在基站中执行如实施例 1或 3所述的探测参 考信号的发送方法。
在本实施例中还提供一种计算机可读程序, 其中当在用户设备中执 行所述程序时, 该程序使得计算机在该用户设备中执行如实施例 2 或 3 所述的探测参考信号的发送方法。
在本实施例中还提供一种存储有计算机可读程序的存储介质, 其中 该计算机可读程序使得计算机在用户设备中执行如实施例 2或 3所述的 探测参考信号的发送方法。
本发明以上的装置和方法可以由硬件实现, 也可以由硬件结合软件 实现。 本发明涉及这样的计算机可读程序, 当该程序被逻辑部件所执行 时, 能够使该逻辑部件实现上文所述的装置或构成部件, 或使该逻辑部 件实现上文所述的各种方法或歩骤。 本发明还涉及用于存储以上程序的 存储介质, 如硬盘、 磁盘、 光盘、 DVD、 flash存储器等。
以上结合具体的实施方式对本发明进行了描述, 但本领域技术人员 应该清楚, 这些描述都是示例性的, 并不是对本发明保护范围的限制。 本领域技术人员可以根据本发明的精神和原理对本发明做出各种变型和 修改, 这些变型和修改也在本发明的范围内。

Claims

1、 一种探测参考信号的发送方法, 所述方法包括: 基站生成用于指示下行接收的下行控制信息, 所述下行控制信息包 括指示用户设备是否发送非周期的探测参考信号、 以及在发送所述非周 期的探测参考信号时, 所使用的资源的指示信息; 并且利用所述下行控 制信息的填充比特来承载所述指示信息;
向用户设备发送所述下行控制信息, 以使所述用户设备根据所述下 行控制信息中包含的指示信息进行非周期的探测参考信号的发送。
2、 根据权利要求 1所述的方法, 其中, 所述方法还包括: 所述基站配置多组资源, 所述多组资源中的每一组资源均包括发送 所述非周期的探测参考信号所使用的资源信息;
将配置的所述多组资源与相应的指示信息对应储存;
并且在指示用户设备发送非周期的探测参考信号时, 所述指示信息 中指示用户设备使用的资源为预先配置的多组资源中的一组。
3、 根据权利要求 1所述的方法, 其中, 所述方法还包括: 所述基站配置一组发送所述非周期的探测参考信号所使用的资源信 息中的部分资源信息, 并进行储存;
所述基站配置多组除了所述部分资源信息以外的发送所述非周期的 探测参考信号所需要的资源;
将配置的除了所述部分资源信息以外的发送所述非周期的探测参考 信号所需要的资源与相应的指示信息对应储存;
并且, 在指示用户设备发送非周期的探测参考信号时, 所述指示信 息中指示用户设备使用的资源为除了所述部分资源以外的发送所述非周 期的探测参考信号所需要的资源。
4、 根据权利要求 2或 3所述的方法, 其中, 发送所述非周期的探测 参考信号所使用的资源信息是基站配置的发送周期的探测参考信号的资 源信息的子集。
5、 根据权利要求 1所述的方法, 其中, 所述下行控制信息的格式为
1A。
6、 一种探测参考信号的发送方法, 所述方法包括: 用户设备接收基站发送的指示下行接收的下行控制信息; 其中, 所 述下行控制信息包括指示用户设备是否发送非周期的探测参考信号、 以 及在发送非周期的探测参考信号时, 所使用的资源的指示信息; 并且所 述基站利用所述下行控制信息的填充比特来承载所述指示信息;
所述用户设备根据所述指示信息进行非周期的探测参考信号的发送。
7、 根据权利要求 6所述的方法, 其中, 所述用户设备根据所述指示 信息进行非周期的探测参考信号的发送, 包括:
若所述用户设备确定所述指示信息为发送非周期的探测参考信号的 指示信息, 则所述用户设备根据所述指示信息、 以及预存的指示信息和 资源的第一映射关系来确定发送所述非周期的探测参考信号所使用的资源; 所述用户设备利用确定的所述资源发送所述非周期的探测参考信号、 或者所述用户设备利用确定的所述资源和预存的资源来发送所述非周期 的探测参考信号。
8、 根据权利要求 6所述的方法, 其中, 所述用户设备根据所述指示 信息进行非周期的探测参考信号的发送, 包括:
若所述用户设备确定所述指示信息为发送非周期的探测参考信号的 指示信息, 则所述用户设备根据所述指示信息、 以及预存的指示信息和 资源的第二映射关系确定发送所述非周期的探测参考信号所使用的资源; 所述用户设备利用预存的资源、 以及确定的所述资源来发送所述非 周期的探测参考信号。
9、 根据权利要求 6所述的方法, 其中, 所述下行控制信息的格式为
1A。
10、 一种基站, 所述基站包括:
信息生成单元, 所述信息生成单元用于生成指示下行接收的下行控 制信息, 所述下行控制信息包括指示用户设备是否发送非周期的探测参 考信号、 以及在发送所述非周期的探测参考信号时, 所使用的资源的指 示信息; 并且利用所述下行控制信息的填充比特来承载所述指示信息; 信息发送单元, 所述信息发送单元用于向用户设备发送所述下行控 制信息, 以使所述用户设备根据所述下行控制信息中包含的指示信息进 行非周期的探测参考信号的发送。
11、 根据权利要求 10所述的基站, 其中, 所述基站还包括: 第一资源配置单元, 所述第一资源配置单元用于配置多组资源, 所 述多组资源中的每一组资源包括发送所述非周期的探测参考信号所使用 的资源信息;
第一映射关系存储单元, 所述第一映射关系存储单元用于将配置的 多组资源与相应的指示信息对应储存;
并且在指示用户设备发送非周期的探测参考信号时, 所述指示信息 中指示用户设备使用的资源为预先配置的多组资源中的一组。
12、 根据权利要求 10所述的基站, 其中, 所述基站还包括: 第二资源配置单元, 所述第二资源配置单元用于配置一组发送所述 非周期的探测参考信号所使用的资源信息中的部分资源信息;
存储单元, 所述存储单元用于储存所述第二资源配置单元配置的部 分资源信息;
第三配置单元, 所述第三配置单元用于配置多组除了所述部分资源 信息以外的发送所述非周期的探测参考信号所需要的资源;
第二映射关系存储单元, 所述第二映射关系存储单元用于将配置的 多组除了所述部分资源信息以外的发送所述非周期的探测参考信号所需 要的资源与相应的指示信息对应储存;
并且, 在指示用户设备发送非周期的探测参考信号时, 所述指示信 息中指示用户设备使用的资源为除了所述部分资源信息以外的发送所述 非周期的探测参考信号所需要的资源。
13、 一种用户设备, 所述用户设备包括:
信息接收单元, 所述信息接收单元用于接收基站发送指示下行接收 的下行控制信息; 其中, 所述下行控制信息包括指示用户设备是否发送 非周期的探测参考信号、 以及在发送非周期的探测参考信号时, 所使用 的资源的指示信息; 并且所述基站利用所述下行控制信息的填充比特来 承载所述指示信息;
信息处理单元, 所述信息处理单元用于根据所述信息接收单元接收 的所述指示信息进行非周期的探测参考信号的发送。
14、根据权利要求 13所述的用户设备,其中,所述信息处理单元包括: 第一判断单元, 所述第一判断单元用于判断所述指示信息是否为发 送非周期的探测参考信号的指示信息;
第一资源确定单元, 所述第一资源确定单元用于在所述指示信息是 发送非周期的探测参考信号的指示信息时, 根据所述指示信息、 以及预 存的指示信息和资源的第一映射关系来确定发送所述非周期的探测参考 信号所使用的资源;
第一信号发送单元, 所述第一信号发送单元用于利用所述第一资源 确定单元确定的所述资源发送所述非周期的探测参考信号; 或者利用所 述第一资源确定单元确定的资源和预存的资源来发送所述非周期的探测 参考信号。
15、根据权利要求 13所述的用户设备,其中,所述信息处理单元包括: 第二判断单元, 所述第二判断单元用于判断所述指示信息是否为发 送非周期的探测参考信号的指示信息;
第二资源确定单元, 所述第二资源确定单元用于在所述指示信息是 发送非周期的探测参考信号的指示信息时, 根据所述指示信息、 以及预 存的指示信息和资源的第二映射关系确定发送所述非周期的探测参考信 号所使用的资源;
第二信号发送单元, 所述第二信号发送单元用于利用预先配置的资 源、 以及所述第二资源确定单元确定的所述资源来发送所述非周期的探 测参考信号。
16、 一种计算机可读程序, 其中当在基站中执行所述程序时, 所述 程序使得计算机在所述基站中执行如权利要求 1至 5的任一项权利要求 所述的探测参考信号的发送方法。
17、 一种存储有计算机可读程序的存储介质, 其中所述计算机可读 程序使得计算机在基站中执行如权利要求 1至 5的任一项权利要求所述 的探测参考信号的发送方法。
18、 一种计算机可读程序, 其中当在用户设备中执行所述程序时, 所述程序使得计算机在所述用户设备中执行如权利要求 6至 9的任一项 权利要求所述的探测参考信号的发送方法。
19、 一种存储有计算机可读程序的存储介质, 其中所述计算机可读 程序使得计算机在用户设备中执行如权利要求 6至 9的任一项权利要求 所述的探测参考信号的发送方法。
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