WO2011137847A1 - 发送与接收探测参考信号的方法、基站和用户设备 - Google Patents

发送与接收探测参考信号的方法、基站和用户设备 Download PDF

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Publication number
WO2011137847A1
WO2011137847A1 PCT/CN2011/074928 CN2011074928W WO2011137847A1 WO 2011137847 A1 WO2011137847 A1 WO 2011137847A1 CN 2011074928 W CN2011074928 W CN 2011074928W WO 2011137847 A1 WO2011137847 A1 WO 2011137847A1
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WO
WIPO (PCT)
Prior art keywords
field
reference signal
control signaling
sounding reference
signaling
Prior art date
Application number
PCT/CN2011/074928
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English (en)
French (fr)
Inventor
柯柏安
周明宇
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP11777266.5A priority Critical patent/EP2592803A4/en
Publication of WO2011137847A1 publication Critical patent/WO2011137847A1/zh
Priority to US13/760,621 priority patent/US20130201941A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/0012—Hopping in multicarrier systems
    • 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

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a method for transmitting and receiving a sounding reference signal, a base station, and a user equipment. Background technique
  • the sounding reference signal is an uplink signal sent by the user equipment (UE, User Equipment) to implement uplink frequency domain scheduling.
  • the method for transmitting the sounding reference signal is: the base station configures various parameters of the SRS for the user equipment; the base station sends the parameters of the SRS to the user equipment by using dedicated signaling; after receiving the dedicated signaling, the user equipment follows The corresponding configuration of the SRS parameters sends the SRS to the base station, so that the base station can obtain the uplink channel information through the SRS.
  • Designing dedicated signaling for controlling the transmission of the SRS improves the signaling overhead of the communication system and improves the complexity of the communication system.
  • Embodiments of the present invention provide a method, a base station, and a user equipment for transmitting and receiving sounding reference signals, which can simplify signaling design of a communication system.
  • a method of transmitting a sounding reference signal comprising:
  • the first field of the control signaling is used to indicate transmission of data or a sounding reference signal
  • the second field is used to indicate that the data is transmitted or the sounding reference signal is sent.
  • the third field is used to indicate frequency band information when the data is transmitted or the sounding reference signal is sent;
  • a method of receiving a sounding reference signal comprising:
  • control signaling where a first field in the control signaling is used to indicate transmission of data or a sounding reference signal, and a second field is used to indicate that the data is transmitted or the frequency hopping used by the sounding reference signal is transmitted. a mode, the third field is used to indicate frequency band information when the data is transmitted or when the sounding reference signal is sent;
  • an embodiment of the present invention provides a base station, including: a signaling generation module, configured to generate control signaling, where a first field in the control signaling is used to indicate transmission data or send Detecting a reference signal, the second field is used to indicate the frequency hopping mode used to transmit the data or the sounding reference signal, and the third field is used to indicate the frequency band information when the data is transmitted or the sounding reference signal is sent. ;
  • a signaling sending module configured to send the control signaling to the user equipment
  • a receiving module configured to receive, by the user equipment, the first field that determines the control signaling, after indicating that the sounding reference signal is sent, according to the third field indicated by the control signaling
  • the embodiment of the present invention further provides a user equipment, including: a signaling receiving module, configured to receive control signaling from a base station, where a first field in the control signaling is used to indicate Transmitting data or transmitting a sounding reference signal, the second field is used to indicate the frequency hopping mode used to transmit the data or the sounding reference signal, and the third field is used to indicate that the data is transmitted or the sounding reference is sent.
  • a signaling receiving module configured to receive control signaling from a base station, where a first field in the control signaling is used to indicate Transmitting data or transmitting a sounding reference signal, the second field is used to indicate the frequency hopping mode used to transmit the data or the sounding reference signal, and the third field is used to indicate that the data is transmitted or the sounding reference is sent.
  • a frequency band information of a signal configured to determine, according to the first field in the control signaling, whether the control signaling indicates whether to send the sounding reference signal or to instruct to transmit the data; a sending module, configured to: when the first field of the control signaling indicates that the sounding reference signal is sent, use the control signal according to the frequency band information indicated by the third field in the control signaling And causing the sounding mode indicated by the second field in the middle to send the sounding reference signal.
  • the data transmission is multiplexed.
  • the user equipment performs transmission selection between sending the sounding reference signal and transmitting the data.
  • the base station sends the control signaling to control the transmission of the sounding reference signal or the transmission data.
  • the user equipment uses the indicated hop according to the indicated frequency band information.
  • the frequency mode transmits a sounding reference signal.
  • the signaling of the control data transmission is multiplexed to schedule the transmission of the sounding reference signal, and the user equipment selects and transmits the sounding reference signal and the transmission data, so that no new control signaling is needed for the sounding reference signal, which is reduced.
  • the signaling overhead reduces the complexity of the communication system and ensures compatibility of the communication system backwards. Further, the embodiment of the present invention can also avoid signal interference when data and sounding reference signals are simultaneously transmitted.
  • FIG. 1 is a flowchart of a method for transmitting a sounding reference signal according to an embodiment of the present invention
  • FIG. 2 is a flowchart of sending a user equipment according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a user equipment transmitting an SRS indication from a subframe symbol bit according to an embodiment of the present invention
  • FIG. 4 is a schematic diagram of a user equipment transmitting an SRS indication from a plurality of subframe symbol bits according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of hopping in a SRS sub-frame according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of frequency hopping between transmitting SRS subframes according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a SRS and a transmission data hopping scheme according to an embodiment of the present invention
  • FIG. 8 is a schematic diagram of periodically transmitting SRS and periodically transmitting data according to Embodiment 2 of the present invention
  • 9 is a schematic diagram of a user equipment repeatedly transmitting an SRS according to Embodiment 3 of the present invention
  • FIG. 10 is a schematic diagram of a base station according to Embodiment 5 of the present invention.
  • FIG. 1 is a schematic diagram of a user equipment according to Embodiment 6 of the present invention.
  • FIG. 12 is a schematic diagram of a sending module according to Embodiment 6 of the present invention.
  • FIG. 13 is a schematic diagram of a communication system according to Embodiment 7 of the present invention.
  • FIG. 14 is a schematic diagram of a multi-band transmission SRS according to Embodiment 1 of the present invention.
  • 15 is a schematic diagram of a user equipment transmitting an SRS from a slot symbol bit according to an embodiment of the present invention
  • 16 is a schematic diagram of a user equipment transmitting an SRS indication from a plurality of slot symbol bits according to an embodiment of the present invention
  • FIG. 17 is a flowchart of a method for receiving a sounding reference signal according to an embodiment of the present invention.
  • a first embodiment of the present invention is based on a communication system including a base station and a user equipment.
  • the method for transmitting a sounding reference signal in a communication system according to the first embodiment of the present invention includes the following steps:
  • Step 101 Receive control signaling from a base station, where a first field in the control signaling is used to indicate transmission of data or a sounding reference signal, and a second field is used to indicate that the data is transmitted or the detection is sent.
  • the frequency hopping mode adopted by the reference signal, and the third field is used to indicate the frequency band information when the data is transmitted or the sounding reference signal is transmitted.
  • the signaling sent by the base station to the user equipment includes a plurality of fields.
  • two commonly used frequency hopping modes are frequency hopping and no frequency hopping, and the 0 and 1 states of one bit in the field may respectively represent frequency hopping or no frequency hopping.
  • the first field, the second field, and the third field are used only for distinguishing the fields in the control signaling, and do not represent the field order in the control signaling, and the control signal is The order is not limited to only three fields, and may also include other indicated fourth fields, fifth fields, and the like.
  • the SRS is used to measure the uplink channel, and the base station uses the measured channel information to perform uplink timing detection, power control, uplink frequency domain scheduling, and link adaptation.
  • the SRS can be transmitted from different frequency bands.
  • the uplink data transmission can support the frequency hopping mechanism, and the mechanism for transmitting data can be multiplexed with the mechanism for transmitting the SRS.
  • Step 102 Determine, according to the first field in the control signaling, whether the control signaling indicates whether to send a sounding reference signal or to indicate transmission data.
  • the user equipment reads each field of the control signaling, and sends an SRS or transmits data according to the content of each field in a specified manner.
  • the present invention integrates a field having multiple indication meanings into one signaling, which can save the number of times of signaling, thereby saving signaling overhead and reducing the complexity of the communication system.
  • the embodiment of the present invention multiplexes the signaling indicating the sending of the SRS or the indication of the transmission data into one type of signaling, which saves the communication system to additionally design signaling overhead for transmitting the SRS, and reduces the complexity of the communication system, and can ensure The communication system is backwards compatible.
  • the user equipment performs only one operation between transmitting the SRS and transmitting data according to the received control signaling, thereby avoiding signal interference when simultaneously transmitting the SRS and transmitting data.
  • Step 103 When the first field of the control signaling indicates that the sounding reference signal is sent, use the control signaling according to the frequency band information indicated by the third field in the control signaling.
  • the frequency hopping mode indicated by the second field sends the sounding reference signal.
  • the frequency hopping mode referred to in the embodiment of the present invention includes at least frequency hopping and no frequency hopping. More specifically, sending the sounding reference signal according to the frequency band information in the frequency hopping mode indicated by the control signaling may include the following:
  • the user equipment When the SRS is transmitted in a manner that does not use the frequency hopping, the user equipment sends the SRS in the frequency band indicated by the frequency band information, and when the SRS is sent in the frequency hopping manner, according to the indication indicated by the third field in the control signaling.
  • the frequency band information and the frequency hopping rule obtain a frequency band used at a transmission timing of the sounding reference signal, and the sounding reference signal is transmitted according to a frequency band used for a transmission timing of the sounding reference signal.
  • the frequency band information may include the original frequency band information of the frequency hopping, and the user equipment may determine the time offset according to the current ith transmission time and the original frequency band, and determine according to the set frequency hopping rule.
  • Sending SRS at the time of the ith transmission should be adopted The frequency band, and the SRS is transmitted on the frequency band to be used at the ith transmission time.
  • the base station may notify the user equipment in all the cells to send the hopping rule of the SRS, and may also preset part or all of the content of the hopping rule in the base station and the user equipment;
  • the frequency hopping mode for instructing to send the SRS for example, only one bit of the control signaling is required to notify the user equipment whether to hop the frequency. If the frequency hopping mode is adopted, the user equipment transmits the SRS in the root frequency band.
  • the frequency band that SRS should use, f_start, BW, and ts are variable information, where f_start represents the original frequency band, BW represents the bandwidth of the frequency band, and ts represents the offset information of time.
  • f_start and BW are notified by the third field of the control signaling, and ts may indicate the sequence number of the SRS transmission time (for example, the tsth subframe in one subframe), or may be expressed as the number of times the SRS is transmitted (for example, the next transmission) It is the tsth) and so on. According to the function description, the frequency band that the SRS should adopt at the time of transmission can be obtained.
  • the user equipment may send multiple SRSs on multiple frequency bands according to the indication of the control signaling. For example, in FIG. 14, when the SRS is transmitted for the first time, the user equipment transmits the SRS in the first frequency band and the second frequency band at the same time, and when the SRS is transmitted in the second time, the user equipment transmits the SRS in the fourth frequency band and the fifth frequency band at the same time. , and so on. It should be noted that the SRS in the two frequency bands transmitted may have the same or different frequency hopping rules.
  • the signaling of the transmission data is multiplexed with the signaling of the SRS, and the transmission switching between the SRS and the transmission data of the user equipment in the communication system is formed, and the process is shown in FIG. 2: 101.
  • the SRS is transmitted by using the frequency hopping mode indicated by the control signaling.
  • the process proceeds to step 1032, and the data is transmitted according to the frequency band information in the frequency hopping mode indicated by the control signaling.
  • step 103 of the embodiment of the present invention includes at least one of the following operations: First, when the first field in the control signaling indicates that the sounding reference signal is sent, indicated by the control signaling Transmitting the sounding reference by using the frequency hopping mode indicated by the second field according to the frequency band information indicated by the third field on a subframe time slot The signal, where the control signaling further includes a field indicating a subframe slot.
  • the control instruction indicates that the subframe slot used by the user equipment to send the sounding reference signal is one time slot or multiple time slots.
  • the number of time slots included in a subframe transmitted by the user equipment to the base station is different.
  • the base station may indicate that the user equipment is in different time slots through control signaling.
  • Send SRS For example, for the scenario shown in Figure 4, if the subframe contains two time slots, then the two SRSs transmitted by the user equipment may be located in different time slots, respectively.
  • the first field in the control signaling indicates that the sounding reference signal is sent, according to the frequency band information indicated by the third field, on a symbol bit indicated in the control signaling, And transmitting, by using the frequency hopping mode indicated by the second field, the sounding reference signal, where the control signaling further includes a field indicating a sign bit.
  • the sign bit includes a sub-frame sign bit or a slot sign bit, and the control signal indicates that the sign bit is one or more sign bits.
  • a subframe that is sent by the user equipment to the base station may include a plurality of subframe symbol bits connected by a sequence number, and the control signaling may indicate that the user equipment sends the SRS on one or more subframe symbol bits.
  • the base station may indicate, by using control signaling, that the user equipment sends an SRS from a subframe symbol bit.
  • the user equipment sends the subframe symbol bit of the SRS to be the first symbol bit; or
  • the base station may also indicate, by using control signaling, that the user equipment sends the SRS from multiple subframe symbol bits.
  • the subframe symbol of the SRS sent by the user equipment is the first and eighth symbol bits, because multiple times. Transmitting SRS can obtain diversity gain, so transmitting SRS in multiple subframe symbol bits can further enhance the ability to detect channel information.
  • the sequence number of the subframe symbol bits in one subframe sent by the user equipment to the base station may be disconnected, which is especially applicable to a case where one subframe includes multiple slots, for example, as shown in FIG.
  • the sub-frame symbol bit numbers in each slot are sorted from the same starting sequence number, and the sequence number of the sub-frame symbol bits in one slot is connected.
  • the field of the indicator bit indicates the slot symbol bit, i.e., the sub-frame symbol bit within one slot.
  • the time slot used for transmitting the SRS may be indicated by the above-mentioned field indicating the subframe time slot. As shown in FIG.
  • the control signaling indicates, by using the field indicating the subframe slot, that the user equipment sends an SRS in the first time slot, where the field indicating the slot symbol bit indicates that the user equipment sends the SRS in the first symbol bit. Therefore, the user equipment transmits the SRS in the first symbol bit of the first slot according to the instruction.
  • the control signaling indicates, by using the field indicating the subframe slot, that the user equipment sends an SRS in the first and second time slots, where the field indicating the slot symbol bit indicates that the user equipment is in the first symbol. The bit transmits the SRS, so the user equipment transmits the SRS in the first sign bit of the first and second time slots according to the instruction.
  • the frequency hopping mode indicated by the second field is used. And transmitting, by the orthogonal code generated by the control signaling, a sounding reference signal, where the control signaling further includes a field indicating an orthogonal code.
  • the base station can also allocate different orthogonal codes to the SRSs of different user equipments by using the control signaling, and the user equipment loads the orthogonal codes sent by the base station to ensure orthogonality between different user equipments, thereby avoiding user equipments.
  • Mutual interference
  • the user equipment When transmitting the sounding reference signal, the user equipment may simultaneously include one or more of the above three operations.
  • the base station may use the fourth field in the control signaling to indicate one or more of a subframe slot, a symbol bit, and an orthogonal code used for transmitting the SRS; of course, the base station may also multiplex control signaling.
  • the third field is used to indicate one or more of a subframe slot, a symbol bit, and an orthogonal code for transmitting the SRS; or the base station may notify the user equipment of the resources by additional signaling.
  • the base station may indicate, by using other signaling or other fields of the control signaling, whether the user equipment uses intra-subframe frequency hopping or a subframe when transmitting the SRS. Frequency hopping.
  • the frequency hopping mode in the subframe indicates that the frequency band used by the user equipment to transmit the SRS may be different in the same subframe and between different subframes. For example, as shown in FIG. 5, in the first subframe in which the SRS is transmitted for the first time, the user equipment transmits the SRS in the first frequency band in the first time slot of the first subframe, and then in the first subframe.
  • the second time slot transmits the SRS through the fourth frequency band; in the second subframe of the second transmission SRS, the user equipment transmits the SRS in the second frequency band in the first time slot of the second subframe, and then in the The second slot of the two subframes transmits the SRS through the third frequency band.
  • the frequency hopping mode between subframes indicates that the frequency bands used by the user equipment to transmit the SRS are different in different subframes, and are the same in the same subframe. For example, as shown in FIG. 6, in the first subframe in which the SRS is transmitted for the first time (the SRS is located at the 7th and 14th sign bits), the user equipment transmits the SRS in the first frequency band; the second transmission of the SRS in the second transmission. Within two subframes, the user equipment transmits the SRS in the fourth frequency band. Further, in the case that the frequency hopping mode used for transmitting the SRS is frequency hopping, the embodiment of the present invention further includes the following steps:
  • the user equipment determines, in the frequency hopping rule, the frequency band to be used for transmitting the SRS according to the offset of the current time and the frequency band information indicated by the third field of the control signaling.
  • the hopping mode indicated by the second field sends the sounding reference signal, where, in the control signaling, the first field indicates that the sounding reference signal is sent, and the control signaling is
  • the frequency hopping mode indicated by the second field is frequency hopping, according to the frequency band information indicated by the third field in the control signaling and the frequency hopping rule, a transmission frequency band is obtained, where the transmission frequency band is obtained.
  • the signaling indicating the frequency hopping rule includes the relevant parameters required for determining the transmission frequency band, and the function structure required for determining the transmission frequency band may be delivered by the command or may be preset to the user equipment.
  • the signaling indicating the frequency hopping rule may multiplex the related signaling indicating the transmission data, and when the signaling indicating the transmission data hopping rule is used to indicate that the SRS is sent, then the sending of the SR S may be performed.
  • the frequency band order is the same as the frequency band order of the transmitted data.
  • the first embodiment of the present invention further provides a method for receiving a sounding reference signal, including:
  • Step 111 Generate control signaling, where a first field in the control signaling is used to indicate transmission of data or a sounding reference signal, and a second field is used to indicate that the data is transmitted or the sounding reference signal is sent.
  • the frequency hopping mode, the third field is used to indicate the frequency band information when the data is transmitted or the sounding reference signal is transmitted.
  • Step 112 Send the control signaling to a user equipment.
  • Step 1 13 After receiving the first field that is determined by the user equipment to determine the control signaling, indicating that the sounding reference signal is sent, the frequency band indicated by the third field in the control signaling is received. And the information, using the sounding reference signal sent by the frequency hopping mode indicated by the second field in the control signaling.
  • the method for receiving a sounding reference signal corresponds to the method for transmitting a sounding reference signal, generating control signaling, and receiving an SRS or data sent according to the control signaling.
  • the multiplexing of the signaling of the transmitted data reduces the signaling overhead, reduces the complexity of the communication system, and ensures compatibility of the communication system backwards.
  • the second embodiment of the present invention is based on the first embodiment, and the manner of transmitting the SRS multiple times is illustrated.
  • the method before receiving the control signaling from the base station, the method further includes the following steps:
  • Step 201 Receive semi-static scheduling parameters sent by the base station.
  • the semi-persistent scheduling parameter includes a sending period value of the SRS.
  • the control signal When the first field of the control signaling indicates that the sounding reference signal is sent, the control signal is adopted according to the frequency band information indicated by the third field in the control signaling according to the sending period value.
  • the frequency hopping pattern indicated by the second field in the command periodically transmits the sounding reference signal.
  • the communication system uses a semi-persistent scheduling transmission, and the base station sends semi-persistent scheduling signaling to the user equipment to activate the semi-persistent scheduling transmission. After receiving the semi-static scheduling signaling, the user equipment does not need to receive new signaling multiple times. Signals are sent periodically, which saves signaling for continuously transmitted scenes.
  • the embodiment of the present invention multiplexes a semi-persistent scheduling transmission mechanism, and the base station sends a semi-persistent scheduling parameter to the user equipment in advance, so that the semi-persistent scheduling parameter includes a semi-static transmission SRS period value; then, the base station sends control signaling to the user equipment to activate Semi-static scheduling transmission; user equipment Reading the field in the control signaling after receiving the control signaling, if the control signaling indicates sending
  • the frequency hopping mode indicated by the control signaling is used, and the SRS is sent according to the semi-persistent scheduling transmission period value included in the semi-persistent scheduling signaling on the frequency band obtained according to the frequency band information; if the control signaling indicates the transmission data, the SRS is adopted.
  • the frequency hopping mode indicated by the control signaling transmits the data symbols according to the semi-persistent scheduling transmission period value included in the semi-persistent scheduling signaling on the frequency band obtained according to the frequency band information. For example, referring to FIG.
  • one subframe includes 14 symbols, assuming that the user equipment transmits data on the first 13 symbols, and transmits SRS on the last symbol, and the semi-persistent scheduling parameter indicates that the transmission period is 2 subframes;
  • the user equipment sends the SRS according to the following figure 8 (a); if the control signaling indicates that the user equipment sends the data, the user equipment transmits the data in the manner shown in Figure 8 (b) below.
  • the base station can stop the periodic transmission of the SRS by means of deactivation.
  • the time interval for transmitting the sounding reference signal is equal to the time interval for transmitting the data, where the transmission period value of the SRS and the data transmission period value are equal.
  • the relevant signaling of the data transmission can be multiplexed to stop transmitting the SRS.
  • the embodiment of the present invention multiplexes the semi-persistent scheduling mechanism of the communication system, and sends the SRS period through the semi-persistent scheduling parameter, and transmits the SRS multiple times after the periodic parameters are delivered, thereby further reducing the signaling overhead.
  • Embodiment 3 of the present invention provides another example for the manner of transmitting the sounding reference signal multiple times on the basis of the first embodiment.
  • the number of times the user equipment sends the sounding reference signal may be implemented in any of the following manners. First, in step 101, before receiving the control signaling from the base station, set the number of times the sounding reference signal is sent in the base station and the user equipment.
  • the control signaling is adopted according to the frequency band information indicated by the third field in the control signaling.
  • the hopping mode indicated by the second field is sent by the sounding reference signal, where: when the first field in the control signaling indicates that the sounding reference signal is sent, according to the control signaling
  • the frequency band information indicated by the third field using the frequency hopping mode indicated by the second field in the control signaling, according to the set number of times The quantity is used to transmit the sounding reference signal. In this way, the base station does not need to send signaling to notify the user equipment of the number of times the SRS is sent.
  • the user equipment Before receiving the control signaling from the base station, the user equipment receives the signaling sent by the base station to indicate the number of times the sounding reference signal is sent.
  • the control signaling is adopted according to the frequency band information indicated by the third field in the control signaling.
  • the hopping mode indicated by the second field is sent by the sounding reference signal, where: when the first field in the control signaling indicates that the sounding reference signal is sent, according to the control signaling
  • the frequency band information indicated by the third field, in the frequency hopping mode indicated by the second field in the control signaling is sent according to the number of times indicated by the signaling. This allows for greater flexibility in the design of the communication system.
  • the SRS may be sent multiple times by using the following steps.
  • the step may be separately performed to implement multiple times of transmitting the SRS, or may be implemented together with the method of sending the sounding reference signal times to implement multiple times of sending the SRS. Or combined with the method of periodically sending SRS.
  • step 102 After the step of transmitting the sounding reference signal in the frequency hopping mode indicated by the second field in the control signaling, in step 102, according to the frequency band information indicated by the third field in the control signaling, The base station determines whether the user equipment is still required to send the SRS again, and notifies the user equipment to perform the signaling. And when the received signaling for transmitting the ACK/NACK indicates to continue to send the sounding reference signal, send the sounding reference signal to the base station at a time of sending the next sounding reference signal, and/or when receiving The signaling of the transmission ACK/NACK indicates that the transmission of the sounding reference signal is stopped when the sounding reference signal is stopped.
  • the user equipment first transmits the SRS; in the fifth subframe, the base station sends signaling to the user equipment, notifying the user equipment to send the SRS again; in the ninth subframe, the user equipment The SRS is transmitted again according to the instructions of the base station.
  • the user equipment receives signaling for transmitting an ACK/NACK (positive acknowledgement/negative acknowledgement) sent by the base station when confirming whether the SRS needs to be sent again; wherein, the signaling indication of transmitting the ACK/NACK Whether to continue to send SRS.
  • ACK/NACK signaling is signaling for feedback signals in a hybrid automatic repeat transmission mechanism in a communication system, and is implemented by the present invention.
  • the signaling in the hybrid automatic repeat transmission mechanism is used to feed back whether the SRS needs to be retransmitted, and the base station indicates whether the user equipment continues to send the SRS by sending an acknowledgement or a negative acknowledgement to the user equipment.
  • the PHICH Physical Hybrid Automatic Repeat Indicator Channel
  • LTE Long Term Evolution
  • the PHICH is used to notify the user equipment whether Re-transmission of PUSCH is required to reduce system complexity and provide greater flexibility.
  • the user equipment in the nth subframe, the user equipment first transmits the PUSCH; in the n+4th subframe, the base station sends the ACK/NACK signaling to the user equipment to notify the user equipment whether the PUSCH needs to be retransmitted; if the base station will NACK to the user equipment, it said user equipment needs to re-transmit a physical uplink shared channel (PUSCH, physical uplink shared channel) , PUSCH transmission 1 J shellfish again at the n + 8 th subframe, the user equipment. In this way, multiple transmissions make the decoding of the PUSCH more reliable by the base station. At this time, the interval between the initial transmission and the retransmission is 8 subframes, that is, the round-trip delay is equal to the time of 8 subframes.
  • PUSCH physical uplink shared channel
  • the time interval for sending the SRS in the embodiment of the present invention is equal to the time interval of data transmission. That is, the time interval for transmitting the SRS in the embodiment of the present invention is equal to the time interval for transmitting the PUSCH.
  • the base station can receive the SRS in the same manner as the initial transmission and the retransmission of the received PUSCH, thereby reducing the complexity of the system and facilitating the system.
  • the scheduling of the base station when frequency hopping occurs between multiple transmitted SRSs, the base station receives the SRS to obtain a better diversity gain. For example, the user equipment transmits the SRS four times, and the frequency band of each SRS is different, so that the base station can learn the channel information of the four frequency bands through the four transmissions.
  • the fourth embodiment of the present invention further multiplexes the field of the control signaling in the first embodiment, thereby further reducing the overhead of control signaling.
  • the second field of the mode is the same field in the control signaling.
  • the embodiment of the present invention may use the field to indicate that the frequency hopping method is used to send the
  • the reference signal is detected or transmitted in a non-frequency hopping manner; the sounding reference signal may be transmitted in a non-frequency hopping manner or the data may be transmitted in a frequency hopping manner.
  • the discontinuous frequency band transmission data is usually There is no need to use frequency hopping to obtain additional diversity effects, and the SRS is usually transmitted in a frequency hopping mode, so multiple fields of control signaling can be multiplexed together for joint coding. For example, a first field of control signaling for discontinuous band transmission can be multiplexed with a second field.
  • the first field of the control signaling includes a bit, when the bit is 1, the user equipment is instructed to use the frequency hopping mode 1 to send the SRS; when the bit is 0, the user equipment is instructed to use the frequency hopping mode 2
  • frequency hopping mode 1 indicates frequency hopping
  • frequency hopping mode 2 indicates no frequency hopping.
  • the bit is 1 the user equipment is instructed to use the frequency hopping method to send the SRS, so that the base station can learn the channel information of the multiple frequency bands.
  • the bit is 0, the user equipment is instructed to send data by using no frequency hopping. Since the data is transmitted in a discontinuous frequency band, it has a good diversity effect even without frequency hopping.
  • Embodiments of the present invention are applicable to user equipment having multiple antenna inputs and antenna outputs.
  • the base station that receives the SRS generates control signaling, where the first field and the second field in the control signaling are the same field in the control signaling. .
  • the embodiment of the present invention utilizes the characteristics of transmitting data and transmitting SRS in a communication system, by multiplexing a field in a control signaling, using a field to indicate whether to send an SRS or transmitting data, and the field also indicates that the SRS is sent or
  • the frequency hopping mode of transmitting data further reduces the overhead of control signaling.
  • a fifth embodiment of the present invention provides a base station 1 that can be used to perform the steps of the foregoing method embodiments, including: a signaling generating module 1 1 for generating control signaling, where the control signal
  • the first field is used to indicate the transmission of the data or the sounding reference signal is sent
  • the second field is used to indicate the frequency hopping mode used to transmit the data or the sounding reference signal
  • the third field is used to indicate the transmission of the
  • the data is the frequency band information when the sounding reference signal is sent
  • the signaling sending module 12 is configured to send the control signaling to the user equipment
  • the receiving module 13 is configured to receive, by the user equipment, the control signal.
  • Order The first field is a location indicated by the second field in the control signaling, according to the frequency band information indicated by the third field in the control signaling, after the sending of the sounding reference signal The sounding reference signal transmitted in the frequency hopping mode.
  • the signaling of the transmission data is multiplexed with the signaling of the SRS.
  • the base station sends the S signaling to the user equipment to send the SRS, and the user equipment reads the control signaling according to the The frequency band information and the frequency hopping mode indicated by the instruction send the SRS.
  • the base station sends the control signaling to indicate that the user equipment transmits the data, and the user equipment reads the control signaling, and the user equipment indicates according to the instruction.
  • Band signal, ⁇ and frequency modes transmit data.
  • the uplink data transmission can support the frequency hopping mechanism, so the signaling of the transmitted data and the signaling of the SRS are multiplexed, which can save the overhead of additionally designing signaling for transmitting the SRS, and simplify the signaling design. Reduce the complexity of the communication system and ensure backward compatibility of the communication system.
  • the present invention integrates a field having multiple indication meanings into one signaling, which can save the number of times of signaling, thereby saving signaling overhead and reducing the complexity of the communication system.
  • the signaling generating module 1 1 includes: a field multiplexing submodule 1 1 1 for jointly coding the first field and the second field into the same field.
  • the field included in the control signaling for the discontinuous band transmission for indicating whether to transmit the SRS or the transmission data may be multiplexed with the field for indicating the frequency hopping mode, and one field indicates the transmission of the SRS or the transmission of the data, This field also indicates the frequency hopping mode for transmitting SRS or transmitting data, further reducing the overhead of control signaling.
  • a sixth embodiment of the present invention provides a user equipment 2 corresponding to the base station mentioned in Embodiment 5 in the communication system, which may be used to perform the steps of the foregoing corresponding method embodiments, including:
  • the module 21 is configured to receive control signaling from a base station, where a first field in the control signaling is used to indicate transmission of data or a sounding reference signal, and a second field is used to indicate that the data is transmitted or sent.
  • the frequency hopping mode is used to indicate the sounding reference signal, and the third field is used to indicate the frequency band information when the data is transmitted or the sounding reference signal is sent.
  • the signaling reading module 22 is configured to be used according to the control signaling.
  • the frequency hopping mode referred to in the embodiment of the present invention includes at least two modes of frequency hopping and no frequency hopping.
  • the sending module sends the SRS in the frequency band indicated by the frequency band information.
  • the frequency band information and the frequency hopping rule indicated by the control signaling are obtained.
  • the frequency band used for the transmission timing of the sounding reference signal transmits the lookup 'J reference signal according to the frequency band used for the transmission timing of the sounding reference signal.
  • the frequency band information may be the original frequency band information of the frequency hopping
  • the user equipment may determine, according to the offset of the current ith transmission time and the original frequency band, the frequency band to be used for transmitting the SRS at the ith transmission time in the set hopping rule. And transmitting the SRS on the frequency band to be used at the ith transmission time.
  • the user equipment can transmit multiple SRSs on multiple frequency bands in accordance with the indication of control signaling.
  • the frequency band that SRS should use, f_start, BW, and ts are variable information, where f_start represents the original frequency band, BW represents the bandwidth of the frequency band, and ts represents the offset information of time.
  • f_start and BW are notified by the second field of the control signaling, and ts may indicate the sequence number of the SRS transmission time (for example, the tsth subframe in one subframe), or may be expressed as the number of times the SRS is transmitted (for example, the next transmission) It is the tsth) and so on. According to the function description, the frequency band that the SRS should adopt at the time of transmission can be obtained.
  • the user equipment performs an operation of transmitting the SRS or transmitting the data according to the control signaling sent by the base station, and the user equipment switches between the two states of sending the SRS and transmitting the data according to the control signaling.
  • the user equipment performs only one operation according to the received control signaling between transmitting the SRS and transmitting data, thereby avoiding signal interference when simultaneously transmitting the SRS and transmitting data.
  • the sending module 23 further includes at least one sub-module as follows:
  • a time slot loading sub-module 231 configured to: when the first field in the control signaling indicates that the sounding reference signal is sent, on a subframe time slot indicated by the control signaling, according to the third field indication The frequency band information is sent by using the frequency hopping mode indicated by the second field And sending the sounding reference signal, where the control signaling further includes a field indicating a subframe time slot.
  • a symbol bit loading sub-module 232 configured to: when the first field in the control signaling indicates that the sounding reference signal is sent, on a symbol bit indicated in the control signaling, according to the third field
  • the frequency band information is sent by using the frequency hopping mode indicated by the second field, where the control signaling further includes a field indicating a sign bit.
  • the orthogonal code loading sub-module 234 is configured to: when the first field of the control signaling indicates that the sounding reference signal is sent, use the second field according to the frequency band information indicated by the third field
  • the indicated frequency hopping mode transmits a sounding reference signal generated according to an orthogonal code indicated by the control signaling, wherein the control signaling further includes a field indicating an orthogonal code.
  • a subframe that is sent by the user equipment to the base station includes a different number of time slots, so the control instruction indicates that the subframe time slot used by the user equipment to send the sounding reference signal may be one time slot. Or multiple time slots.
  • the sign bit includes a sub-frame sign bit or a slot sign bit, and the control signal indicates that the sign bit is one or more sign bits.
  • a subframe sent by the user equipment to the base station may include a plurality of subframe symbol bits connected by a sequence number, and the control signaling may instruct the user equipment to send the SRS on one or more subframe symbol bits.
  • the sequence number of the subframe symbol bits in one subframe transmitted by the user equipment to the base station may be disconnected, which is different for one subframe, and is different from the subframe symbol bits that are connected to the multiple sequence numbers in the one subframe.
  • the field of the indicator symbol bit indicates the slot symbol bit, that is, the subframe symbol bit indicating one slot, and the slot used for transmitting the SRS may pass the above indicated subframe.
  • the field of the time slot is indicated.
  • the base station can also allocate different orthogonal codes to the SRSs of different user equipments by using the control signaling, and the user equipment loads the orthogonal codes sent by the base station to ensure orthogonality between different user equipments, thereby avoiding user equipments.
  • Mutual interference
  • one subframe includes multiple time slots and intra-subframe frequency hopping occurs between multiple time slots, if both time slots have SRS transmission, the capability of detecting channel information can be further enhanced.
  • the signaling receiving module 21 is further configured to receive a semi-persistent scheduling parameter sent by the base station, where the semi-persistent scheduling parameter includes the sounding reference signal a sending period value; the signaling reading module 22 is further configured to determine the sending period value of the sounding reference signal indicated in the semi-persistent scheduling parameter; the sending module 23 is further configured to: The first field of the control signaling indicates that, when the sounding reference signal is sent, the control signal is used according to the frequency band information indicated by the third field in the control signaling according to the sending period value. The frequency hopping pattern indicated by the second field periodically transmits the sounding reference signal.
  • the embodiment of the present invention multiplexes a semi-persistent scheduling transmission mechanism, and the base station sends a semi-persistent scheduling parameter to the user equipment in advance, so that the semi-persistent scheduling parameter includes a semi-static transmission SRS period; then, the base station sends control signaling to the user equipment to activate the semi-persistent scheduling. Transmitting; the user equipment reads the field in the control signaling after receiving the control signaling, and if the control signaling indicates that the SRS is sent, the frequency hopping mode indicated by the control signaling is used according to the frequency band information, according to the semi-persistent scheduling signaling.
  • the semi-statically scheduled transmission period value is included to send the SRS.
  • the semi-persistent scheduling mechanism of the multiplex communication system is configured to send the SRS period value by using the semi-static scheduling parameter, and the SRS is transmitted multiple times after the period parameter is delivered, thereby further saving the signaling overhead.
  • the user equipment sends the SRS multiple times.
  • the base station may determine whether the user equipment needs to send the SRS again after the SRS is sent to the base station, and notify the user equipment by signaling. carried out.
  • the signaling receiving module 21 is further configured to receive signaling for transmitting an ACK/NACK from the base station, where the signaling reading module 22 is further configured to determine the ACK/NACK for transmitting The signaling is to indicate whether to continue to send the sounding reference signal or to stop transmitting the sounding reference signal; and the sending module 23 is further configured to: when the signaling of the transmission ACK/NACK indicates to continue to send the sounding reference signal, Sending the sounding reference signal to the base station at a time when the sounding reference signal is transmitted, and/or stopping transmitting the signal when the signaling of the transmitted ACK/NACK is received to stop transmitting the sounding reference signal Probe reference signal.
  • the ACK/NACK signaling is used for the feedback signal in the hybrid automatic retransmission mechanism in the communication system.
  • the signaling in the hybrid automatic retransmission mechanism is used to feedback whether the SRS needs to be retransmitted, and the base station passes the The user equipment sends a positive acknowledgment or a negative acknowledgment to indicate whether the user equipment continues to send the SRS.
  • the PHICH Physical Hybrid Automatic Repeat Indicator Channel
  • LTE Long Term Evolution
  • time interval for the sending module to send the SRS is equal to the time interval for transmitting the data.
  • the time interval is a transmission period value of the SRS or a transmission period value of the data.
  • the relevant signaling of the data transmission can be multiplexed to stop transmitting the SRS.
  • the time interval for transmitting the SRS may be equal to the time interval for transmitting the PUSCH.
  • the interval at which the user equipment sends the SRS multiple times is equal to the round-trip delay of the user equipment performing the HARQ transmission, the base station can receive the SRS in the same manner as the initial transmission and the retransmission of the received PUSCH, thereby reducing the complexity of the system and facilitating the system.
  • the scheduling of the base station is
  • the signaling receiving module 21 is further configured to receive signaling that is sent by the base station to indicate a frequency hopping rule, where the sending module 23 is further configured to be used in the control signaling.
  • a field indicating that the sounding reference signal is sent, and the frequency hopping mode indicated by the second field in the control signaling is frequency hopping, according to the indication indicated by the third field in the control signaling
  • the frequency band information and the frequency hopping rule obtain a frequency band used at a transmission timing of the sounding reference signal, and the sounding reference signal is transmitted according to a frequency band used for a transmission timing of the sounding reference signal.
  • the user equipment determines, in the frequency hopping rule, the frequency band to be used for transmitting the SRS according to the offset of the current time and the frequency band information indicated by the second field of the control signaling.
  • the signaling indicating the hopping rule may multiplex the related signaling indicating the transmission data, and when the signaling indicating the transmission data hopping rule is used to indicate that the SRS is sent, then the frequency band in which the SRS is transmitted may be caused. The order is the same as the frequency band of the transmitted data.
  • the user equipment sends the sounding reference signal according to the frequency hopping rule of the transmitted data.
  • the frequency band order of transmitting the SRS is the same as the frequency band order of the transmission data
  • the signaling of the f mega-frequency target of the Physical Uplink Shared Channel (PUSCH) can be multiplexed, thereby further reducing the signaling overhead.
  • PUSCH Physical Uplink Shared Channel
  • a seventh embodiment of the present invention provides a communication system 3 including the base station 1 and the user equipment 2 of the foregoing embodiment, which may be used to perform the steps of the foregoing method embodiments.
  • the base station 1 is configured to generate control signaling, where a first field in the control signaling is used to indicate transmission of data or a sounding reference signal, and a second field is used to indicate that the data is transmitted or The frequency hopping mode used by the sounding reference signal is used, and the third field is used to indicate the frequency band information when the data is transmitted or the sounding reference signal is sent, and the control signaling is sent to the user equipment 2, and the receiving information is received.
  • the control is adopted.
  • the frequency band information according to the control signaling in the third field indicates, using the frequency hopping pattern in the control signaling indicates the second field of the sounding reference signal transmission.
  • the base station performs signaling multiplexing and integrates multiple indications into one signaling, which can save the overhead of the communication system to additionally design signaling for transmitting the SRS, reduce the complexity of the communication system, and ensure that the communication system has backwards. compatibility.
  • the user equipment performs only one operation between the transmission of the SRS and the transmission data according to the received control signaling, thereby avoiding signal interference when simultaneously transmitting the SRS and transmitting data.
  • modules in the embodiment can be combined into one module, or can be further split into multiple sub-modules.

Description

发送与接收探测参考信号的方法、 基站和用户设备 技术领域
本发明涉及无线通信技术领域， 尤其涉及一种发送与接收探测参 考信号的方法、 基站和用户设备。 背景技术
探测参考信号 ( SRS , Sounding Reference Signal )是用户设备 ( UE, User Equipment ) 发送的上行信号， 用以实现上行的频域调度。
在现有技术中， 发送探测参考信号的方法为， 基站为用户设备配 置 SRS的各种参数； 基站通过专属信令将上述 SRS的参数发送给用户 设备； 用户设备收到专属信令后， 按照 SRS参数的相应配置发送 SRS 给基站， 从而基站可以通过 SRS获得上行的信道信息。
但是本发明人发现上述方法至少存在如下问题： 为控制 SRS 的发 送设计专属信令提高了通信系统的信令开销，同时提高了通信系统的复 杂度。
发明内容
本发明的实施例提供一种发送与接收探测参考信号的方法、 基站 和用户设备， 能够简化通信系统的信令设计。
为达到上述目的， 本发明的实施例采用如下技术方案：
一种发送探测参考信号的方法， 包括：
接收来自基站的控制信令， 其中， 所述控制信令中第一字段用于指 示传输数据或是发送探测参考信号，第二字段用于指示传输所述数据或 是发送所述探测参考信号采用的跳频模式，第三字段用于指示传输所述 数据或是发送所述探测参考信号时的频带信息；
根据所述控制信令中的所述第一字段确定所述控制信令是指示发 送探测参考信号还是指示传输数据；
当所述控制信令中所述第一字段指示发送所述探测参考信号时， 根据所述控制信令中所述第三字段指示的所述频带信息，采用所述控制 信令中所述第二字段指示的所述跳频模式发送所述探测参考信号。 一种接收探测参考信号的方法， 包括：
生成控制信令， 其中， 所述控制信令中第一字段用于指示传输数 据或是发送探测参考信号，第二字段用于指示传输所述数据或是发送所 述探测参考信号采用的跳频模式，第三字段用于指示传输所述数据或是 发送所述探测参考信号时的频带信息；
向用户设备发送所述控制信令；
接收由所述用户设备经过确定所述控制信令的所述第一字段为指 示发送所述探测参考信号后，根据所述控制信令中所述第三字段指示的 所述频带信息，采用所述控制信令中所述第二字段指示的所述跳频模式 发送的所述探测参考信号。
与所述方法相对应地， 本发明实施例提供一种基站， 包括： 信令生成模块， 用于生成控制信令， 其中， 所述控制信令中第一 字段用于指示传输数据或是发送探测参考信号，第二字段用于指示传输 所述数据或是发送所述探测参考信号采用的跳频模式，第三字段用于指 示传输所述数据或是发送所述探测参考信号时的频带信息；
信令发送模块， 用于向用户设备发送所述控制信令；
接收模块， 用于接收由所述用户设备经过确定所述控制信令的所 述第一字段为指示发送所述探测参考信号后，根据所述控制信令中所述 第三字段指示的所述频带信息，采用所述控制信令中所述第二字段指示 的所述跳频模式发送的所述探测参考信号。
与所述方法相对应地， 本发明实施例还提供一种用户设备， 包括： 信令接收模块， 用于接收来自基站的控制信令， 其中， 所述控制 信令中第一字段用于指示传输数据或是发送探测参考信号，第二字段用 于指示传输所述数据或是发送所述探测参考信号采用的跳频模式，第三 字段用于指示传输所述数据或是发送所述探测参考信号时的频带信息； 信令读取模块， 用于根据所述控制信令中的所述第一字段确定所 述控制信令是指示发送所述探测参考信号还是指示传输所述数据； 发送模块， 用于当所述控制信令中所述第一字段指示发送所述探 测参考信号时， 根据所述控制信令中所述第三字段指示的所述频带信 息，采用所述控制信令中所述第二字段指示的所述跳频模式发送所述探 测参考信号。
本发明实施例在发送探测参考信号时复用数据传输， 根据基站下 发的控制信令，用户设备在发送探测参考信号和传输数据间进行传输选 择。通过基站下发控制信令来控制发送探测参考信号或传输数据， 用户 设备读取控制信令后， 当所述控制信令指示发送探测参考信号时， 用户 设备根据指示的频带信息采用指示的跳频模式发送探测参考信号。本发 明实施例复用控制数据传输的信令来调度发送探测参考信号，用户设备 在发送探测参考信号和传输数据间进行传输选择，这样不需要为探测参 考信号设计新的控制信令， 减少了信令开销， 同时降低了通信系统的复 杂度， 并且能够保证通信系统向后具有兼容性。 进一步地， 本发明实施 例还能够避免数据和探测参考信号同时传输时的信号干扰。
附图说明
为了更清楚地说明本发明实施例中的技术方案， 下面将对实施例 中所需要使用的附图作简单地介绍， 显而易见地， 下面描述中的附图仅 仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创 造性劳动的前提下， 还可以根据这些附图获得其他的附图。
图 1为本发明实施例一发送探测参考信号的方法流程图；
图 2为本发明实施例一用户设备进行发送选择流程图；
图 3为本发明实施例一用户设备从一个子帧符号位上发送 SRS示 意图；
图 4为本发明实施例一用户设备从多个子帧符号位上发送 SRS示 意图；
图 5为本发明实施例一发送 SRS子帧内跳频示意图；
图 6为本发明实施例一发送 SRS子帧间跳频示意图；
图 7为本发明实施例一发送 SRS与传输数据跳频方案示意图； 图 8为本发明实施例二周期性发送 SRS和周期性传输数据示意图； 图 9为本发明实施例三中用户设备重复发送 SRS示意图； 图 10为本发明实施例五中基站示意图；
图 1 1为本发明实施例六中用户设备示意图；
图 12为本发明实施例六中发送模块示意图；
图 13为本发明实施例七中通信系统示意图；
图 14为本发明实施例一中多频带发送 SRS示意图；
图 15为本发明实施例一用户设备从一个时隙符号位上发送 SRS示 意图；
图 16为本发明实施例一用户设备从多个时隙符号位上发送 SRS示 意图；
图 17为本发明实施例一接收探测参考信号的方法流程图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案 进行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明一部分实 施例， 而不是全部的实施例。 基于本发明中的实施例， 本领域普通技术 人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本 发明保护的范围。
参见图 1， 本发明实施例一基于包括基站和用户设备的通信系统， 本发明实施例一在通信系统中发送探测参考信号的方法， 包括如下步 骤：
步骤 101、 接收来自基站的控制信令， 其中， 所述控制信令中第一 字段用于指示传输数据或是发送探测参考信号，第二字段用于指示传输 所述数据或是发送所述探测参考信号采用的跳频模式，第三字段用于指 示传输所述数据或是发送所述探测参考信号时的频带信息。
基站向用户设备发送的信令包括多个字段。特别地， 例如两种常用 的跳频模式为跳频与不跳频， 可以通过该字段中一个比特的 0、 1状态分 别代表跳频或不跳频。 其中， 所述第一字段、 所述第二字段与所述第三 字段为仅用于对控制信令中的字段进行用途区分，并不表示控制信令中 的字段顺序， 而且所述控制信令并不限于仅包含三个字段，还可以包含 其他指示的第四字段、 第五字段等等。 SRS用于对上行信道进行测量，基站利用测量得到的信道信息进行 上行定时检测、 功率控制、 上行频域调度、 链路自适应等操作， 为了基 站能够探测到较为全面的信道情况，用户设备则可以从不同的频带上发 送 SRS。 而在通信系统的设计中， 上行数据传输能够支持跳频机制， 可 以将传输数据的机制与发送 SRS的机制复用。
步骤 102、 根据所述控制信令中的所述第一字段确定所述控制信令 是指示发送探测参考信号还是指示传输数据。
本发明实施例中用户设备读取所述控制信令的各个字段，根据各个 字段的内容采用指定方式发送 SRS或是传输数据。 本发明将具有多个指 示意义的字段集成于一条信令中， 可以节省发送信令的次数，从而节省 信令开销使通信系统的复杂度降低。 本发明实施例将指示发送 SRS或指 示传输数据的信令， 复用为一种信令， 节省通信系统为发送 SRS而额外 设计信令的开销， 同时降低了通信系统的复杂度， 并且能够保证通信系 统向后具有兼容性。用户设备在发送 SRS和传输数据之间根据接收到的 控制信令只执行一个操作，避免了同时发送 SRS和传输数据时的信号干 扰。
步骤 103、 当所述控制信令中所述第一字段指示发送所述探测参考 信号时，根据所述控制信令中所述第三字段指示的所述频带信息， 采用 所述控制信令中所述第二字段指示的所述跳频模式发送所述探测参考 信号。
本发明实施例所指的跳频模式至少包括跳频与不跳频。 更为具体 的，根据所述频带信息采用所述控制信令指示的所述跳频模式发送所述 探测参考信号， 可以包括如下情况：
当采用不跳频的方式发送 SRS 时， 用户设备采用该频带信息内所 指频带发送 SRS， 当采用跳频的方式发送 SRS时， 根据所述控制信令 中所述第三字段指示的所述频带信息和跳频规则得到在所述探测参考 信号的发送时刻所使用的频带，按照所述探测参考信号的发送时刻所使 用的频带发送所述探测参考信号。
例如， 当采用跳频的方式发送 SRS 时， 该频带信息可以包括跳频 的原始频带信息，用户设备可以根据当前第 i发送时刻的时间偏移量和 原始频带， 并根据设置的跳频规则确定第 i发送时刻发送 SRS应采用 的频带， 并在第 i发送时刻在所述应采用的频带上发送 SRS。 例如， 基 站可以通过信令通知所有小区内的用户设备发送 SRS 的跳频规则， 也 可以将跳频规则的部分或全部内容预设于基站和用户设备中；基站通过 下发的所述控制信令指示发送 SRS 的跳频模式， 例如只需要控制信令 的 1个比特通知用户设备是否跳频， 若采用跳频的方式，用户设备就根 个频带发送 SRS。
其中， 所述跳频规则可以通过数学函数描述， 包括函数构造本身 与函数相关联的参数， 例如 F = f(f_start,BW,ts,...)， 根据该函数得到的 F表示下一次发送 SRS应该使用的频带， f_start、 BW、 ts为变量信息， 其中， f_start表示原始频带， BW表示频带带宽， ts表示时间的偏移信 息。 其中， f_start和 BW通过控制信令的第三字段通知， ts 可以表示 SRS发送时间的序号 （例如在一个子帧中的第 ts个子帧） ， 也可以表 示为发送 SRS的次数 （例如下一次发送是第 ts次） 等等。 根据该函数 描述可以得到 SRS在发送时刻应该采用的频带。
可选的，用户设备可以根据控制信令的指示在多个频带上发送多个 SRS。 例如图 14， 第一次发送 SRS时， 用户设备在同一时刻分别在第 1 频带和第 2频带发送 SRS， 第二次发送 SRS时， 用户设备在同一时刻在第 4频带和第 5频带发送 SRS， 以此类推。 需要说明的是， 发送的两个频带 内的 SRS， 其跳频规则可以相同也可以不同。
本发明实施例将传输数据的信令与发送 SRS的信令复用， 形成了在 通信系统中用户设备发送 SRS和传输数据之间的传送切换， 流程如图 2 所示： 101、 接收来自基站的控制信令； 1021、 读取控制信令中的字段； 1022、 判断所述控制信令是指示发送 SRS还是数据； 经判断， 当控制信 令指示发送 SRS时， 进入步骤 1031、 根据频带信息采用控制信令所指的 跳频模式发送 SRS ; 经判断， 当控制信令指示传输数据时， 进入步骤 1032、 根据频带信息采用控制信令所指的跳频模式传输数据。
更为具体地， 本发明实施例步骤 103至少包括如下一种操作： 其一、 当所述控制信令中所述第一字段指示发送所述探测参考信 号时，在所述控制信令指示的子帧时隙上，根据所述第三字段指示的所 述频带信息，采用所述第二字段指示的所述跳频模式发送所述探测参考 信号， 其中， 所述控制信令还包括一个指示子帧时隙的字段。
其中， 所述控制指令指示用户设备发送所述探测参考信号所使用 的子帧时隙为一个时隙或是多个时隙。
在不同的通信系统中，用户设备向基站发送的一个子帧包含的时隙 数量有所不同， 当一个子帧包含两个时隙时，基站可以通过控制信令指 示用户设备在不同的时隙发送 SRS。 例如， 对于图 4中所示的情形， 若 子帧包含两个时隙，那么用户设备发送的两个 SRS可以分别位于不同的 时隙。
其二、 当所述控制信令中所述第一字段指示发送所述探测参考信 号时，在所述控制信令中指示的符号位上，根据所述第三字段指示的所 述频带信息，采用所述第二字段指示的所述跳频模式发送所述探测参考 信号， 其中， 所述控制信令还包括一个指示符号位的字段。
所述符号位包括子帧符号位或时隙符号位， 所述控制信令指示的 符号位为一个或多个符号位。
具体地，用户设备向基站发送的一个子帧中可以包括多个序号相连 的子帧符号位，所述控制信令可以指示用户设备在一个或是多个子帧符 号位上发送 SRS。 如图 3所示， 基站可以通过控制信令指示用户设备从 一个子帧符号位上发送 SRS，在图 3中用户设备发送 SRS的所述子帧符号 位为第 1个符号位； 或者如图 4所示，基站也可以通过控制信令指示用户 设备从多个子帧符号位上发送 SRS，在图 4中用户设备发送 SRS的所述子 帧符号为第 1、 8个符号位， 因为多次发送 SRS能够获得分集增益， 故在 多个子帧符号位发送 SRS能够进一步增强探测信道信息的能力。
具体地，用户设备向基站发送的一个子帧中子帧符号位的排序序号 可以是不相连的， 这尤其适用于一个子帧包含多个时隙的情况， 例如， 如图 15所示，每个时隙内的子帧符号位序号均从同样的起始序号开始排 序， 一个时隙内子帧符号位的排序序号相连。 对于此种情况， 所述指示 符号位的字段指示时隙符号位， 即指示一个时隙内部的子帧符号位。 而 发送 SRS采用的时隙可以通过上述指示子帧时隙的字段来指示。如图 15 所示， 控制信令通过所述指示子帧时隙的字段指示用户设备在第 1时隙 发送 SRS， 所述指示时隙符号位的字段指示用户设备在第 1个符号位发 送 SRS， 故用户设备根据指示在第 1时隙的第 1个符号位发送 SRS。 再或 如图 16所示，控制信令通过所述指示子帧时隙的字段指示用户设备在第 1和第 2时隙发送 SRS， 所述指示时隙符号位的字段指示用户设备在第 1 个符号位发送 SRS， 故用户设备根据指示在第 1和第 2时隙的第 1个符号 位发送 SRS。
其三、 当所述控制信令中所述第一字段指示发送所述探测参考信 号时，根据所述第三字段指示的所述频带信息， 采用所述第二字段指示 的所述跳频模式发送根据所述控制信令指示的所述正交码生成的探测 参考信号， 其中， 所述控制信令还包括一个指示正交码的字段。
基站还可以通过控制信令为不同用户设备的 SRS分配不同的正交 码， 用户设备加载基站下发的所述正交码，保证不同用户设备之间的正 交性， 从而避免用户设备之间的相互干扰。
用户设备在发送探测参考信号时，可以同时包括上述三种操作的一 种或多种。基站可以利用所述控制信令中的第四字段指示发送 SRS所使 用的子帧时隙、 符号位和正交码中的一种或多种； 当然， 所述基站也可 以复用控制信令中所述第三字段来指示发送 SRS的子帧时隙、符号位和 正交码中的一种或多种；再或者基站可以通过另外的信令通知用户设备 所使用的这些资源。
更进一步，基于上述具有多个时隙的子帧结构， 所述基站可以通过 其他信令或所述控制信令的其他字段来指示用户设备在发送 SRS时是 采用子帧内跳频还是子帧间跳频。
子帧内的跳频方式表示用户设备发送 SRS时所使用的频带在同一 子帧内以及不同子帧之间都可以不同。 例如如图 5所示， 在第 1次发送 SRS的第一子帧内， 用户设备在所述第一子帧的第一时隙经第 1频带发 送 SRS， 然后在所述第一子帧的第二时隙经第 4频带发送 SRS ; 在第 2次 发送 SRS的第二子帧内， 用户设备在所述第二子帧的第一时隙经第 2频 带发送 SRS， 然后在所述第二子帧的第二时隙经第 3频带发送 SRS。
子帧间的跳频方式表示用户设备发送 SRS所使用的频带在不同子 帧中是不同的， 在同一子帧内是相同的。 例如如图 6所示， 在第 1次发送 SRS的第一子帧内 （SRS位于第 7个和第 14个符号位） ， 用户设备在第 1 频带发送 SRS ; 在第 2次发送 SRS的第二子帧内， 用户设备在第 4频带发 送 SRS。 进一步地， 对于发送 SRS采用的跳频模式为跳频的情况， 本发明 实施例还包括如下步骤：
接收所述基站下发的用于指示跳频规则的信令。
用户设备根据当前时间的偏移量和所述控制信令的第三字段指示 的频带信息在跳频规则中确定此时发送 SRS应采用的频带。
所述当所述控制信令中所述第一字段指示发送所述探测参考信号 时，根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述 控制信令中所述第二字段指示的所述跳频模式发送所述探测参考信号， 具体为， 当所述控制信令中所述第一字段指示发送所述探测参考信号， 且所述控制信令中所述第二字段指示的所述跳频模式为跳频时，根据所 述控制信令中所述第三字段指示的所述频带信息和所述跳频规则，得到 发送频带， 在所述发送频带上发送所述探测参考信号。 其中， 所述指示 跳频规则的信令包含确定发送频带所需的相关参数，而所述确定发送频 带所需的函数构造本身可由该命令一同下发也可预设于用户设备。
进一步地，所述指示跳频规则的信令可以复用指示传输数据的相关 信令， 当指示传输数据跳频规则的信令用于指示发送 SRS时， 那么， 可 以使发送所述 SR S的频带顺序与传输数据的频带顺序相同。 当用户设备上行传输数据时， 如图 7 ( a )所示， 在第 1、 2、 3、 4次发送 中， 用户设备分别从第 1、 4、 2、 3频带发送数据符号； 当用户设备发送 SRS时， 如图 7 ( b ) 所示， 在第 1、 2、 3、 4次发送中， 同样地， 用户设 备分别从第 1、 4、 2、 3频带发送 SRS。 这样可以复用物理上行共享信道 ( PUSCH, Physical Uplink Shared Channel )的f兆频 目关的信令， 从而进 一步的减少信令开销。
参见图 17， 与上述发送探测参考信号相对应的， 本发明实施例一 还提供了一种接收探测参考信号的方法， 包括：
步骤 111、 生成控制信令， 其中， 所述控制信令中第一字段用于指 示传输数据或是发送探测参考信号，第二字段用于指示传输所述数据或 是发送所述探测参考信号采用的跳频模式，第三字段用于指示传输所述 数据或是发送所述探测参考信号时的频带信息。
步骤 112、 向用户设备发送所述控制信令。 步骤 1 13、接收由所述用户设备经过确定所述控制信令的所述第一 字段为指示发送所述探测参考信号后，根据所述控制信令中所述第三字 段指示的所述频带信息，采用所述控制信令中所述第二字段指示的所述 跳频模式发送的所述探测参考信号。
所述接收探测参考信号的方法与所述发送探测参考信号的方法相 对应， 生成控制信令， 接收根据控制信令发送的 SRS或是数据。 复用 传输数据的信令， 减少了信令开销， 同时降低了通信系统的复杂度， 并 且能够保证通信系统向后具有兼容性。
本发明实施例二在实施例一基础上，对多次发送 SRS的方式做了举 例说明。
本发明实施例所述的发送 SRS的方法， 在步骤 101、 接收来自基站 的控制信令之前， 该方法还包括如下步骤：
步骤 201、 接收由所述基站发送的半静态调度参数。
其中， 所述半静态调度参数包括所述 SRS的发送周期值。
所述当所述控制信令中所述第一字段指示发送所述探测参考信号 时，根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述 控制信令中所述第二字段指示的所述跳频模式发送所述探测参考信号， 具体为：
当所述控制信令中所述第一字段指示发送探测参考信号时， 按照 所述发送周期值，根据所述控制信令中所述第三字段指示的所述频带信 息，采用所述控制信令中所述第二字段指示的所述跳频模式周期性地发 送所述探测参考信号。
通信系统采用半静态调度传输表示，基站向用户设备发送半静态调 度信令来激活半静态调度传输， 用户设备收到所述半静态调度信令后， 不需多次接收新的信令即可周期性地发送信号，这种方式能够为连续传 输的场景节约信令。
本发明实施例复用半静态调度传输机制，基站提前向用户设备发送 半静态调度参数， 让所述半静态调度参数包括半静态发送 SRS周期值； 继而，基站向用户设备发送控制信令来激活半静态调度传输； 用户设备 收到控制信令之后读取所述控制信令中的字段，如果控制信令指示发送
SRS , 则采用控制信令指示的跳频模式， 根据频带信息得到的频带上， 按照半静态调度信令中包含的半静态调度发送周期值来发送 SRS ; 如果 控制信令指示传输数据， 则采用控制信令指示的跳频模式，根据频带信 息得到的频带上，按照半静态调度信令中包含的半静态调度发送周期值 来传输数据符号。 例如， 参见图 8， 一个子帧包括 14个符号， 假设用户 设备在前面 13个符号上传输数据， 在最后一个符号上发送 SRS， 半静态 调度参数指示发送周期为 2个子帧； 则如果控制信令指示用户设备发送 SRS , 则用户设备按照下图 8 ( a ) 的方式发送 SRS ; 如果控制信令指示 用户设备发送数据， 则用户设备按照下图 8 ( b )的方式传输数据。 当基 站不需要用户设备发送 SRS时，基站可以通过去激活手段停止周期性的 发送 SRS。
进一步地，发送所述探测参考信号的时间间隔等于传输所述数据的 时间间隔， 在这里， 即 SRS的发送周期值和数据的传输周期值相等。
当 SRS 的发送周期值等于数据的传输周期值时， 可以复用数据传 输的相关信令来停止发送 SRS。
本发明实施例复用通信系统的半静态调度机制，通过半静态调度参 数下发发送 SRS的周期， 一次下发周期参数后多次传输 SRS， 进一步节 约了信令开销。
本发明实施例三在实施例一基础上，对多次发送探测参考信号的方 式做了另一举例说明。
用户设备发送探测参考信号的次数可以通过如下任一种方式实现： 其一、 在步骤 101、 接收来自基站的控制信令之前， 在基站和用户 设备中设置发送所述探测参考信号的次数。
其中，所述当所述控制信令中所述第一字段指示发送所述探测参考 信号时，根据所述控制信令中所述第三字段指示的所述频带信息， 采用 所述控制信令中所述第二字段指示的所述跳频模式发送所述探测参考 信号， 具体为： 当所述控制信令中所述第一字段指示发送探测参考信号 时，根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述 控制信令中所述第二字段指示的所述跳频模式，按照设置的所述次数数 量来发送所述探测参考信号。 这样，基站不需要发送信令来通知用户设 备发送 SRS的次数。
其二、 在步骤 101、 接收来自基站的控制信令之前， 用户设备接收 由所述基站下发的指示发送所述探测参考信号次数的信令。
其中，所述当所述控制信令中所述第一字段指示发送所述探测参考 信号时，根据所述控制信令中所述第三字段指示的所述频带信息， 采用 所述控制信令中所述第二字段指示的所述跳频模式发送所述探测参考 信号， 具体为： 当所述控制信令中所述第一字段指示发送探测参考信号 时，根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述 控制信令中所述第二字段指示的所述跳频模式，按照所述信令指示的所 述次数数量来发送所述探测参考信号。这样能够为通信系统设计获得更 好的灵活度。
进一步地， 本发明实施例还可以通过如下步骤来实现多次发送 SRS , 该步骤可以单独执行来实现多次发送 SRS， 也可与上述发送探测 参考信号的次数方法共同来实现多次发送 SRS，或者与周期性发送 SRS 的方法相结合。
在步骤 102、根据所述控制信令中所述第三字段指示的所述频带信 息，采用所述控制信令中所述第二字段指示的所述跳频模式发送所述探 测参考信号之后，基站决定是否还需用户设备再次发送 SRS， 并通过信 令通知用户设备执行。 当接收到的用于传输 ACK/NACK的信令指示继 续发送所述探测参考信号时， 在下一个所述探测参考信号发送时刻， 向 所述基站发送所述探测参考信号， 和 /或当接收到的所述传输 ACK/NACK的信令指示停止发送所述探测参考信号时， 停止发送所述 探测参考信号。
例如， 如图 9所示， 在第 1子帧， 用户设备初次发送 SRS ; 在第 5子 帧， 基站发送信令给用户设备， 通知用户设备再一次发送 SRS ; 在第 9 子帧， 用户设备按照基站的指示再次发送 SRS。
特别地， 用户设备在确认是否需要再次发送 SRS时， 接收由所述基 站发送的用于传输 ACK/NACK (肯定应答 /否定应答） 的信令； 其中， 所述传输 ACK/NACK的信令指示是否继续发送 SRS。 而 ACK/NACK信 令是通信系统中混合自动重传机制中用于反馈信号的信令，本发明实施 例复用混合自动重传机制中的该信令来反馈是否需要重传 SRS，基站通 过向用户设备发送肯定应答或是否定应答来指示用户设备是否继续发 送 SRS。 例如可以通过 LTE (长期演进系统， Long Term Evolution ) 系 统中的 PHICH (物理混合自动重传指示符信道）， 这样能够进一步复用 PUSCH传输的机制（在 LTE系统中， PHICH用于通知用户设备是否需要 重传 PUSCH ) ， 降低系统复杂度并且带来较大灵活性。
下面对通信系统中的混合自动重传 （ HARQ， Hybrid Automatic Repeat Request )机制做解释说明。 在 HARQ技术中， 在第 n个子帧， 用 户设备初次发送 PUSCH; 在第 n+4个子帧， 基站将 ACK/NACK信令发送 给用户设备以通知用户设备是否需要重新发送 PUSCH ; 如果基站将 NACK发送给用户设备，则表示用户设备需要重新发送物理上行共享信 道（PUSCH, Physical Uplink Shared Channel ) ， 贝1 J在第 n+8个子帧， 用 户设备再一次发送 PUSCH。 这样， 多次传输使基站对 PUSCH的解码更 加可靠， 此时初传和重传的间隔为 8个子帧， 即往返时延等于 8个子帧的 时间。
进一步地， 本发明实施例中发送所述 SRS的时间间隔等于数据传输 的时间间隔。即对于本发明实施例发送 SRS的时间间隔等于发送 PUSCH 的时间间隔。
当用户设备多次发送 SRS的间隔等于用户设备进行 HARQ传输的 往返时延时， 基站就能够按照接收 PUSCH的初传和重传的相同方式来 接收 SRS， 从而降低系统的复杂度， 同时有利于基站的调度， 当多次传 输的 SRS之间发生跳频时， 基站接收 SRS就能获得较好的分集增益。 例 如， 用户设备发送 4次 SRS， 并且每次发送 SRS的频带不同， 从而基站可 以通过这 4次发送获知 4个频带的信道信息。
本发明实施例四是对实施例一中所述控制信令的字段做进一步复 用， 从而进一步降低控制信令的开销。
进一步地，本发明实施例所述控制信令中用于指示传输数据或是发 送探测参考信号的所述第一字段和用于指示传输所述数据或是发送所 述探测参考信号采用的跳频模式的所述第二字段为所述控制信令中的 同一个字段。本发明实施例可以用该字段指示采用跳频的方式发送所述 探测参考信号或采用不跳频的方式传输所述数据；也可以指示采用不跳 频的方式发送所述探测参考信号或采用跳频的方式传输所述数据。
在非连续频带传输（即在同一时刻用户设备在不连续的频带上传输 信号）应用中， 由于从多个非连续的频带上传输的信号具有较好的分集 效果，因此非连续频带传输数据通常不需采用跳频的方式来获得额外的 分集效果， 而发送 SRS通常采用跳频的模式， 因此控制信令的多个字段 可以复用在一起进行联合编码。例如， 用于非连续频带传输的控制信令 的第一字段可以与第二字段复用在一起。 具体地， 所述控制信令的第一 字段包括一个比特， 当该比特为 1时， 指示用户设备使用跳频模式 1来发 送 SRS ; 当该比特为 0时， 指示用户设备使用跳频模式 2来发送数据， 其 中， 例如跳频模式 1表示跳频， 跳频模式 2表示不跳频。 当该比特为 1时， 指示用户设备使用跳频的方式来发送 SRS，便于基站获知多个频带的信 道信息； 当该比特为 0时，指示用户设备使用不跳频的方式来发送数据， 此时由于数据采用了非连续频带传输，即使不跳频也具有良好的分集效 果。 本发明实施例可以适用于具有多天线输入与所天线输出的用户设 备。
与本发明实施例发送 SRS相对应的， 所述接收 SRS的基站生成控 制信令，所述控制信令中所述第一字段和所述第二字段为所述控制信令 中的同一个字段。
本发明实施例利用通信系统中传输数据和发送 SRS的特性， 通过将 一个控制信令中的字段进行复用， 用一个字段指示发送 SRS或是传输数 据， 同时该字段也指示了发送 SRS或是传输数据的跳频模式， 进一步降 低了控制信令的开销。
参见图 10， 本发明实施例五提供了一种基站 1， 可以用来执行上 述相应方法实施例的步骤， 包括： 信令生成模块 1 1， 用于生成控制信 令， 其中， 所述控制信令中第一字段用于指示传输数据或是发送探测参 考信号，第二字段用于指示传输所述数据或是发送所述探测参考信号采 用的跳频模式，第三字段用于指示传输所述数据或是发送所述探测参考 信号时的频带信息； 信令发送模块 12， 用于向用户设备发送所述控制 信令； 接收模块 13， 用于接收由所述用户设备经过确定所述控制信令 的所述第一字段为指示发送所述探测参考信号后，根据所述控制信令中 所述第三字段指示的所述频带信息，采用所述控制信令中所述第二字段 指示的所述跳频模式发送的所述探测参考信号。
本发明实施例将传输数据的信令与发送 SRS的信令复用， 当需要用 户设备发送 SRS时， 基站通过发送控制信令指示用户设备发送 SRS， 用 户设备读取所述控制信令，根据该指令指示的频带信息和跳频模式发送 SRS ; 当需要用户设备传输数据时， 基站通过发送控制信令指示用户设 备传输数据， 用户设备读取所述控制信令，用户设备根据该指令指示的 频带信, ί和 频模式传输数据。
在通信系统的设计中， 上行数据传输能够支持跳频机制，故将传输 数据的信令与发送 SRS的信令复用， 能够节省为发送 SRS而额外设计信 令的开销， 简化信令设计， 降低通信系统的复杂度， 并且能够保证通信 系统的向后兼容性。本发明将具有多个指示意义的字段集成于一条信令 中， 可以节省发送信令的次数，从而节省信令开销使通信系统的复杂度 降低。
进一步地， 参见图 10， 所述信令生成模块 1 1 包括： 字段复用子模 块 1 1 1， 用于将所述第一字段和所述第二字段进行联合编码成为同一个 字段。
用于非连续频带传输的控制信令所包括的用于指示发送 SRS还是 传输数据的字段可以与用于指示跳频模式的字段复用在一起，用一个字 段指示发送 SRS或是传输数据， 同时该字段也指示了发送 SRS或是传输 数据的跳频模式， 进一步降低了控制信令的开销。
参见图 1 1， 本发明实施例六提供了一种在通信系统中与实施例五 提到的基站相对应的用户设备 2， 可以用来执行上述相应方法实施例的 步骤， 包括： 信令接收模块 21， 用于接收来自基站的控制信令， 其中， 所述控制信令中第一字段用于指示传输数据或是发送探测参考信号，第 二字段用于指示传输所述数据或是发送所述探测参考信号采用的跳频 模式，第三字段用于指示传输所述数据或是发送所述探测参考信号时的 频带信息； 信令读取模块 22， 用于根据所述控制信令中的所述第一字 段确定所述控制信令是指示发送所述探测参考信号还是指示传输所述 数据； 发送模块 23， 用于当所述控制信令中所述第一字段指示发送所 述探测参考信号时，根据所述控制信令中所述第三字段指示的所述频带 信息，采用所述控制信令中所述第二字段指示的所述跳频模式发送所述 探测参考信号。
本发明实施例所指的跳频模式至少包括跳频与不跳频两种方式。 当采用不跳频的方式发送 SRS 时， 发送模块采用该频带信息内所指频 带发送 SRS， 当采用跳频的方式发送 SRS时， 根据所述控制信令指示 的频带信息和跳频规则得到在所述探测参考信号的发送时刻所使用的 频带，按照所述探测参考信号的发送时刻所使用的频带发送所述探观 'J参 考信号。 例如， 该频带信息可以为跳频的原始频带信息， 用户设备可以 根据当前第 i 发送时刻的时间的偏移量和原始频带在设置的跳频规则 中确定第 i发送时刻发送 SRS应采用的频带，并在第 i发送时刻在所述 应采用的频带上发送 SRS。再更进一步地， 用户设备可以根据控制信令 的指示在多个频带上发送多个 SRS。
其中， 所述跳频规则可以通过数学函数描述， 包括函数构造本身 与函数相关联的参数， 例如 F = f(f_start,BW,ts,...)， 根据该函数得到的 F表示下一次发送 SRS应该使用的频带， f_start、 BW、 ts为变量信息， 其中， f_start表示原始频带， BW表示频带带宽， ts表示时间的偏移信 息。 其中， f_start和 BW通过控制信令的第二字段通知， ts 可以表示 SRS发送时间的序号 （例如在一个子帧中的第 ts个子帧） ， 也可以表 示为发送 SRS的次数 （例如下一次发送是第 ts次） 等等。 根据该函数 描述可以得到 SRS在发送时刻应该采用的频带。
用户设备根据基站发送的控制信令进行发送 SRS或是传输数据的 操作， 用户设备根据控制信令在发送 SRS和传输数据两个状态间进行 切换。 用户设备在发送 SRS和传输数据之间根据接收到的控制信令只 执行一个操作， 避免了同时发送 SRS和传输数据时的信号干扰。
参见图 12， 更进一步地， 所述发送模块 23还包括如下至少一种子 模块：
时隙加载子模块 231，用于当所述控制信令中所述第一字段指示发 送所述探测参考信号时在所述控制信令指示的子帧时隙上，根据所述第 三字段指示的所述频带信息，采用所述第二字段指示的所述跳频模式发 送所述探测参考信号， 其中， 所述控制信令还包括一个指示子帧时隙的 字段。
符号位加载子模块 232，用于当所述控制信令中所述第一字段指示 发送所述探测参考信号时在所述控制信令中指示的符号位上，根据所述 第三字段指示的所述频带信息采用所述第二字段指示的所述跳频模式 发送所述探测参考信号， 其中， 所述控制信令还包括一个指示符号位的 字段。
正交码加载子模块 234，用于当所述控制信令中所述第一字段指示 发送所述探测参考信号时，根据所述第三字段指示的所述频带信息， 采 用所述第二字段指示的所述跳频模式发送根据所述控制信令指示的正 交码生成的探测参考信号， 其中， 所述控制信令还包括一个指示正交码 的字段。
不同的通信系统中， 用户设备向基站发送的一个子帧包含的时隙 数量有所不同，故所述控制指令指示用户设备发送所述探测参考信号所 使用的子帧时隙可以为一个时隙或是多个时隙。
所述符号位包括子帧符号位或时隙符号位， 所述控制信令指示的 符号位为一个或多个符号位。 具体地， 用户设备向基站发送的一个子帧 中可以包括多个序号相连的子帧符号位，所述控制信令可以指示用户设 备在一个或是多个子帧符号位上发送 SRS。与上述一个子帧中包含多个 序号相连的子帧符号位不同的，用户设备向基站发送的一个子帧中子帧 符号位的排序序号可以是不相连的，这尤其适用于一个子帧包含多个时 隙的情况， 对于此种情况， 所述指示符号位的字段指示时隙符号位， 即 指示一个时隙内部的子帧符号位， 而发送 SRS采用的时隙可以通过上 述指示子帧时隙的字段来指示。
基站还可以通过控制信令为不同用户设备的 SRS分配不同的正交 码， 用户设备加载基站下发的所述正交码，保证不同用户设备之间的正 交性， 从而避免用户设备之间的相互干扰。
进一步地， 当一个子帧包括多个时隙， 多个时隙间发生子帧内跳频 时， 若两个时隙均有 SRS发送， 则能进一步增强探测信道信息的能力。
进一步地， 所述信令接收模块 21， 还用于接收由所述基站发送的 半静态调度参数， 其中， 所述半静态调度参数包括所述探测参考信号的 发送周期值； 所述信令读取模块 22， 还用于确定所述半静态调度参数 中指示的所述探测参考信号的所述发送周期值； 所述发送模块 23， 还 用于当所述控制信令中所述第一字段指示发送探测参考信号时，按照所 述发送周期值， 根据所述控制信令中所述第三字段指示的所述频带信 息，采用所述控制信令中所述第二字段指示的所述跳频模式周期性地发 送所述探测参考信号。
本发明实施例复用半静态调度传输机制，基站提前向用户设备发送 半静态调度参数， 使半静态调度参数包括半静态发送 SRS周期； 继而， 基站向用户设备发送控制信令来激活半静态调度传输；用户设备收到控 制信令之后读取所述控制信令中的字段， 如果控制信令指示发送 SRS， 则根据频带信息采用控制信令指示的跳频模式，按照半静态调度信令中 包含的半静态调度发送周期值来发送 SRS。本发明实施例复用通信系统 的半静态调度机制， 通过半静态调度参数下发发送 SRS的周期值， 一次 下发周期参数后多次传输 SRS， 进一步节约了信令开销。
用户设备多次发送 SRS 除利用半静态调度参数下发发送周期值 外， 还可以在用户设备每次发送 SRS给基站之后， 基站决定是否还需 用户设备再次发送 SRS， 并通过信令通知用户设备执行。
进一步地， 所述信令接收模块 21， 还用于接收来自所述基站的用 于传输 ACK/NACK的信令； 所述信令读取模块 22， 还用于确定所述传 输 ACK/NACK的信令是指示继续发送所述探测参考信号还是停止发送 所述探测参考信号； 所述发送模块 23， 还用于当所述传输 ACK/NACK 的信令指示继续发送所述探测参考信号时，在下一个所述探测参考信号 发送时刻， 向所述基站发送所述探测参考信号， 和 /或当接收到的所述 传输 ACK/NACK的信令指示停止发送所述探测参考信号时， 停止发送 所述探测参考信号。
ACK/NACK信令是通信系统中混合自动重传机制中用于反馈信号 的信令，本发明实施例复用混合自动重传机制中的该信令来反馈是否需 要重传 SRS，基站通过向用户设备发送肯定应答或是否定应答来指示用 户设备是否继续发送 SRS。 例如可以通过 LTE (长期演进系统， Long Term Evolution ) 系统中的 PHICH (物理混合自动重传指示符信道）， 这 样能够进一步复用 PUSCH传输的机制（在 LTE系统中， PHICH用于通知 用户设备是否需要重传 PUSCH ) ， 降低系统复杂度并且带来较大灵活 性。
进一步地， 所述发送模块发送所述 SRS 的时间间隔等于传输所述 数据的时间间隔。
对于周期性的发送 SRS或是传输数据， 所述时间间隔为 SRS的发 送周期值或数据的传输周期值。 当 SRS 的发送周期值等于数据的传输 周期值时， 可以复用数据传输的相关信令来停止发送 SRS。
对于按照次数或是等待基站指示发送 SRS的情况， 发送 SRS的时间 间隔可以等于发送 PUSCH的时间间隔。当用户设备多次发送 SRS的间隔 等于用户设备进行 HARQ传输的往返时延时， 基站就能够按照接收 PUSCH的初传和重传的相同方式来接收 SRS， 从而降低系统的复杂度， 同时有利于基站的调度。
进一步地， 所述信令接收模块 21， 还用于接收所述基站下发的用 于指示跳频规则的信令； 所述发送模块 23， 还用于当所述控制信令中 所述第一字段指示发送所述探测参考信号，且所述控制信令中所述第二 字段指示的所述跳频模式为跳频时，根据所述控制信令中所述第三字段 指示的所述频带信息和所述跳频规则得到在所述探测参考信号的发送 时刻所使用的频带，按照所述探测参考信号的发送时刻所使用的频带发 送所述探测参考信号。
用户设备根据当前时间的偏移量和所述控制信令的第二字段指示 的频带信息在跳频规则中确定此时发送 SRS应采用的频带。
进一步地，所述指示跳频规则的信令可以复用指示传输数据的相关 信令， 当指示传输数据跳频规则的信令用于指示发送 SRS时， 那么， 可 以使发送所述 SRS的频带顺序与传输数据的频带顺序相同。在多次发送 SRS的过程中， 用户设备按照传输数据的跳频规则发送所述探测参考信 号。 当发送 SRS的频带顺序与传输数据的频带顺序相同时， 可以复用物 理上行共享信道 ( PUSCH, Physical Uplink Shared Channel ) 的f兆频 目 关的信令， 从而进一步的减少信令开销。
参见图 13， 本发明实施例七提供了一种包括上述实施例基站 1和 用户设备 2的通信系统 3， 可以用来执行上述相应方法实施例的步骤， 所述基站 1， 用于生成控制信令， 其中， 所述控制信令中第一字段用于 指示传输数据或是发送探测参考信号，第二字段用于指示传输所述数据 或是发送所述探测参考信号采用的跳频模式，第三字段用于指示传输所 述数据或是发送所述探测参考信号时的频带信息，将所述控制信令向所 述用户设备 2发送，并接收由所述用户设备 2经过确定所述控制信令的 所述第一字段为指示发送所述探测参考信号后，根据所述控制信令中所 述第三字段指示的所述频带信息，采用所述控制信令中所述第二字段指 示的所述跳频模式发送的所述探测参考信号； 所述用户设备 2， 用于接 收来自所述基站 1的所述控制信令，根据所述控制信令中的所述第一字 段确定所述控制信令是指示发送所述探测参考信号还是指示传输所述 数据， 当所述控制信令中所述第一字段指示发送所述探测参考信号时， 根据所述控制信令中所述第三字段指示的所述频带信息，采用所述控制 信令中所述第二字段指示的所述跳频模式发送所述探测参考信号。
基站进行信令复用，将多个指示集成于一条信令中， 能够节省通信 系统为发送 S R S而额外设计信令的开销， 同时降低了通信系统的复杂 度， 并且能够保证通信系统向后具有兼容性。 用户设备在发送 SRS和传 输数据之间根据接收到的控制信令只执行一个操作， 避免了同时发送 SRS和传输数据时的信号干扰。
本领域技术人员可以理解附图只是一个优选实施例的示意图， 附 图中的模块或流程并不一定是实施本发明所必须的。
本领域技术人员可以理解实施例中的模块可以合并为一个模块， 也可以进一步拆分成多个子模块。
上述本发明实施例序号仅仅为了描述， 不代表实施例的优劣。 限于此，任何本领域的技术人员能思之的变化都应落入本发明的保护范 围。

Claims

权利要求 书
1、 一种发送探测参考信号的方法， 其特征在于， 包括：
接收来自基站的控制信令， 其中， 所述控制信令中第一字段用于指 示传输数据或是发送探测参考信号， 第二字段用于指示传输所述数据或 是发送所述探测参考信号采用的跳频模式， 第三字段用于指示传输所述 数据或是发送所述探测参考信号时的频带信息；
根据所述控制信令中的所述第一字段确定所述控制信令是指示发送 所述探测参考信号还是指示传输所述数据；
当所述控制信令中所述第一字段指示发送所述探测参考信号时， 根 据所述控制信令中所述第三字段指示的所述频带信息， 采用所述控制信 令中所述第二字段指示的所述跳频模式发送所述探测参考信号。
2、 按照权利要求 1所述的发送探测参考信号的方法， 其特征在于， 所述当所述控制信令中所述第一字段指示发送所述探测参考信号时， 根 据所述控制信令中所述第三字段指示的所述频带信息， 采用所述控制信 令中所述第二字段指示的所述跳频模式发送所述探测参考信号， 至少包 括如下一种操作：
当所述控制信令中所述第一字段指示发送所述探测参考信号时， 在 所述控制信令指示的子帧时隙上， 根据所述第三字段指示的所述频带信 息， 采用所述第二字段指示的所述跳频模式发送所述探测参考信号， 其 中， 所述控制信令还包括一个指示所述子帧时隙的字段；
当所述控制信令中所述第一字段指示发送所述探测参考信号时， 在 所述控制信令中指示的符号位上， 根据所述第三字段指示的所述频带信 息， 采用所述控制信令第二字段指示的所述跳频模式发送所述探测参考 信号， 其中， 所述控制信令还包括一个指示所述符号位的字段；
当所述控制信令中所述第一字段指示发送所述探测参考信号时， 根 据所述第三字段指示的所述频带信息， 采用所述第二字段指示的所述跳 频模式发送根据所述控制信令指示的正交码生成的探测参考信号， 其中， 所述控制信令还包括一个指示所述正交码的字段。
3、 按照权利要求 1或 2所述的发送探测参考信号的方法， 其特征在 于： 所述第一字段和所述第二字段为所述控制信令中的同一个字段。
4、 按照权利要求 1或 2所述的发送探测参考信号的方法， 其特征在 于， 在所述接收来自基站的控制信令之前， 该方法包括：
接收由所述基站发送的半静态调度参数， 其中， 所述半静态调度参 数包括所述探测参考信号的发送周期值；
所述当所述控制信令中所述第一字段指示发送所述探测参考信号 时， 根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述 控制信令中所述第二字段指示的所述跳频模式发送所述探测参考信号， 具体为：
当所述控制信令中所述第一字段指示发送所述探测参考信号时， 按 照所述发送周期值， 根据所述控制信令中所述第三字段指示的所述频带 信息， 采用所述控制信令中所述第二字段指示的所述跳频模式周期性地 发送所述探测参考信号。
5、 按照权利要求 1或 2所述的发送探测参考信号的方法， 其特征在 于， 在所述接收来自基站的控制信令之前， 该方法还包括：
设置发送所述探测参考信号的次数； 其中， 所述当所述控制信令中 所述第一字段指示发送所述探测参考信号时， 根据所述控制信令中所述 第三字段指示的所述频带信息， 采用所述控制信令中所述第二字段指示 的所述跳频模式发送所述探测参考信号， 具体为： 当所述控制信令中所 述第一字段指示发送所述探测参考信号时， 根据所述控制信令中所述第 三字段指示的所述频带信息， 采用所述控制信令中所述第二字段指示的 所述跳频模式， 按照设置的所述次数数量来发送所述探测参考信号； 或 接收由所述基站下发的指示发送所述探测参考信号次数的信令； 其 中， 所述当所述控制信令中所述第一字段指示发送所述探测参考信号时， 根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述控制 信令中所述第二字段指示的所述跳频模式发送所述探测参考信号， 具体 为： 当所述控制信令中所述第一字段指示发送所述探测参考信号时， 根 据所述控制信令中所述第三字段指示的所述频带信息， 采用所述控制信 令中所述第二字段指示的所述跳频模式， 按照所述信令指示的所述次数 数量来发送所述探测参考信号。
6、 按照权利要求 1、 4或 5所述的发送探测参考信号的方法， 其特 征在于：
在根据所述控制信令中所述第三字段指示的所述频带信息， 采用所 述控制信令中所述第二字段指示的所述跳频模式发送所述探测参考信号 之后， 还包括： 当接收到的用于传输 ACK/NACK的信令指示继续发送所 述探测参考信号时， 在下一个所述探测参考信号发送时刻， 向所述基站 发送所述探测参考信号，和 /或当接收到的所述传输 ACK/NACK的信令指 示停止发送所述探测参考信号时， 停止发送所述探测参考信号。
7、 按照权利要求 4至 6任一项所述的发送探测参考信号的方法， 其 特征在于：
发送所述探测参考信号的时间间隔等于传输所述数据的时间间隔。
8、 按照权利要求 1至 7任一项所述的发送探测参考信号的方法， 其 特征在于， 该方法还包括：
接收所述基站下发的用于指示跳频规则的信令；
所述当所述控制信令中所述第一字段指示发送所述探测参考信号 时， 根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述 控制信令中所述第二字段指示的所述跳频模式发送所述探测参考信号， 具体为，
当所述控制信令中所述第一字段指示发送所述探测参考信号， 且所 述控制信令中所述第二字段指示的所述跳频模式为跳频时， 根据所述控 制信令中所述第三字段指示的所述频带信息和所述跳频规则得到在所述 探测参考信号的发送时刻所使用的频带， 按照所述探测参考信号的发送 时刻所使用的频带发送所述探测参考信号。
9、 一种接收探测参考信号的方法， 其特征在于， 包括：
生成控制信令， 其中， 所述控制信令中第一字段用于指示传输数据 或是发送探测参考信号， 第二字段用于指示传输所述数据或是发送所述 探测参考信号采用的跳频模式， 第三字段用于指示传输所述数据或是发 送所述探测参考信号时的频带信息；
向用户设备发送所述控制信令；
接收由所述用户设备经过确定所述控制信令的所述第一字段为指示 发送所述探测参考信号后， 根据所述控制信令中所述第三字段指示的所 述频带信息， 采用所述控制信令中所述第二字段指示的所述跳频模式发 送的所述探测参考信号。
10、 按照权利要求 9所述的接收探测参考信号的方法， 其特征在于： 生成的所述控制信令中所述第一字段和所述第二字段为所述控制信令中 的同一个字段。
1 1、 一种基站， 其特征在于， 包括：
信令生成模块， 用于生成控制信令， 其中， 所述控制信令中第一字 段用于指示传输数据或是发送探测参考信号， 第二字段用于指示传输所 述数据或是发送所述探测参考信号采用的跳频模式， 第三字段用于指示 传输所述数据或是发送所述探测参考信号时的频带信息；
信令发送模块， 用于向用户设备发送所述控制信令；
接收模块， 用于接收由所述用户设备经过确定所述控制信令的所述 第一字段为指示发送所述探测参考信号后， 根据所述控制信令中所述第 三字段指示的所述频带信息， 采用所述控制信令中所述第二字段指示的 所述跳频模式发送的所述探测参考信号。
12、 按照权利要求 1 1所述的基站， 其特征在于， 所述信令生成模块 包括： 字段复用子模块， 用于将所述第一字段和所述第二字段进行联合 编码成为同一个字段。
13、 一种用户设备， 其特征在于， 包括：
信令接收模块， 用于接收来自基站的控制信令， 其中， 所述控制信 令中第一字段用于指示传输数据或是发送探测参考信号， 第二字段用于 指示传输所述数据或是发送所述探测参考信号采用的跳频模式， 第三字 段用于指示传输所述数据或是发送所述探测参考信号时的频带信息；
信令读取模块， 用于根据所述控制信令中的所述第一字段确定所述 控制信令是指示发送所述探测参考信号还是指示传输所述数据；
发送模块， 用于当所述控制信令中所述第一字段指示发送所述探测 参考信号时， 根据所述控制信令中所述第三字段指示的所述频带信息， 采用所述控制信令中所述第二字段指示的所述跳频模式发送所述探测参 考信号。
14、 按照权利要求 12所述的用户设备， 其特征在于， 所述发送模块 还包括如下至少一种子模块：
时隙加载子模块， 用于当所述控制信令中所述第一字段指示发送所 述探测参考信号时， 在所述控制信令指示的子帧时隙上， 根据所述第三 字段指示的所述频带信息， 采用所述第二字段指示的所述跳频模式发送 所述探测参考信号， 其中， 所述控制信令还包括一个指示所述子帧时隙 的字段；
符号位加载子模块， 用于当所述控制信令中所述第一字段指示发送 所述探测参考信号时， 在所述控制信令中指示的符号位上， 根据所述第 三字段指示的所述频带信息， 采用所述第二字段指示的所述跳频模式发 送所述探测参考信号， 其中， 所述控制信令还包括一个指示所述符号位 的字段；
正交码加载子模块， 用于当所述控制信令中所述第一字段指示发送 所述探测参考信号时， 根据所述第三字段指示的所述频带信息， 采用所 述第二字段指示的所述跳频模式发送根据所述控制信令指示的正交码生 成的探测参考信号， 其中， 所述控制信令还包括一个指示所述正交码的 字段。
15、 按照权利要求 13所述的用户设备， 其特征在于：
所述信令接收模块， 还用于接收由所述基站发送的半静态调度参数， 其中， 所述半静态调度参数包括所述探测参考信号的发送周期值；
所述信令读取模块， 还用于确定所述半静态调度参数中指示的所述 探测参考信号的所述发送周期值；
所述发送模块， 还用于当所述控制信令中所述第一字段指示发送所 述探测参考信号时， 按照所述发送周期值， 根据所述控制信令中所述第 三字段指示的所述频带信息， 采用所述控制信令中所述第二字段指示的 所述跳频模式周期性地发送所述探测参考信号。
16、 按照权利要求 11所述的用户设备， 其特征在于：
所述信令接收模块， 还用于接收来自 所述基站的用于传输 ACK/NACK的信令；
所述信令读取模块， 还用于确定所述传输 ACK/NACK的信令是指示 继续发送所述探测参考信号还是指示停止发送所述探测参考信号； 所述发送模块， 还用于当所述传输 ACK/NACK的信令指示继续发送 所述探测参考信号时， 在下一个所述探测参考信号发送时刻， 向所述基 站发送所述探测参考信号，和 /或当接收到的所述传输 ACK/NACK的信令 指示停止发送所述探测参考信号时， 停止发送所述探测参考信号。
17、 按照权利要求 13所述的用户设备， 其特征在于：
所述信令接收模块， 还用于接收所述基站下发的用于指示跳频规则 的信令；
所述发送模块， 还用于当所述控制信令中所述第一字段指示发送所述 探测参考信号， 且所述控制信令中所述第二字段指示的所述跳频模式为跳 频时， 根据所述控制信令中所述第三字段指示的所述频带信息和所述跳频 规则得到在所述探测参考信号的发送时刻所使用的频带， 按照所述探测参 考信号的发送时刻所使用的频带发送所述探测参考信号。
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