WO2010012238A1 - 上行探测参考信号的带宽确定方法、系统和装置 - Google Patents

上行探测参考信号的带宽确定方法、系统和装置 Download PDF

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Publication number
WO2010012238A1
WO2010012238A1 PCT/CN2009/073007 CN2009073007W WO2010012238A1 WO 2010012238 A1 WO2010012238 A1 WO 2010012238A1 CN 2009073007 W CN2009073007 W CN 2009073007W WO 2010012238 A1 WO2010012238 A1 WO 2010012238A1
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WIPO (PCT)
Prior art keywords
srs
bandwidth
terminal
uplink
signaling
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PCT/CN2009/073007
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English (en)
French (fr)
Inventor
潘学明
肖国军
索士强
丁昱
Original Assignee
大唐移动通信设备有限公司
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.)
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Application filed by 大唐移动通信设备有限公司 filed Critical 大唐移动通信设备有限公司
Priority to MX2011001042A priority Critical patent/MX2011001042A/es
Priority to US13/056,911 priority patent/US9125205B2/en
Priority to EP09802431.8A priority patent/EP2315482B1/en
Priority to KR1020117004826A priority patent/KR101218138B1/ko
Priority to JP2011520311A priority patent/JP6082184B2/ja
Publication of WO2010012238A1 publication Critical patent/WO2010012238A1/zh
Priority to US14/805,195 priority patent/US9763236B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453Resources in frequency domain, e.g. a carrier in FDMA
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/20Control channels or signalling for resource management
    • H04W72/21Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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
    • H04L5/0092Indication of how the channel is divided
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a bandwidth determining method, system and apparatus for an uplink sounding reference signal. Background technique
  • the 3rd Generation Partnership Project (3GPP) is in the Long Term Evolution (LTE) program, especially for the Time Division Duplex (TDD), due to the symmetry of the uplink and downlink channels. Therefore, the Sounding Reference Signal (SRS) is used to obtain the Channel State Information (CSI) of the corresponding frequency band for channel quality detection, and supports downlink feedback-free beamforming. Wait for the operation. Moreover, the SRS can transmit within a large bandwidth, and the system can measure the channel information in the bandwidth of the downlink channel.
  • LTE Long Term Evolution
  • TDD Time Division Duplex
  • CSI Channel State Information
  • the SRS is transmitted with the maximum bandwidth as much as possible to support measuring the channel information in the maximum bandwidth of the downlink channel.
  • SRS can generally be located in the following two locations:
  • Uplink Pilot Time Slot in the special subframe.
  • Figure 1 shows the frame structure of LTE TDD.
  • one radio frame includes two fields, and each field includes 5 subframes, that is, one radio frame includes 10 subframes, as shown in the subframe 0 to subframe 9.
  • the sub-frame 1 and the sub-frame 6 are special sub-frames, and the remaining sub-frames are regular sub-frames, and the conventional sub-frames include regular uplink sub-frames.
  • the special subframe includes a Downlink Pilot Time Slot (DwPTS), a guard interval (GP), and an Uplink Pilot Time Slot (UpPTS).
  • DwPTS Downlink Pilot Time Slot
  • GP guard interval
  • UpPTS Uplink Pilot Time Slot
  • the UE sends the SRS with the maximum bandwidth level notified by the system. As shown in Figure 2, the UE sends the SRS with the maximum bandwidth notified by the system.
  • the maximum bandwidth notified by the system is BWO-Normal.
  • the UpPTS may need to carry a Physical Random Access Channel (PRACH).
  • PRACH Physical Random Access Channel
  • the UpPTS carries the PRACH, because in the UpPTS slot, the SRS and the PRACH must be completely separated in the frequency domain, that is, In the frequency division multiplexing mode, the interference between the two is avoided.
  • the UE uses the bandwidth of the uplink system bandwidth to remove the PRACH occupied bandwidth in the UpPTS to transmit the SRS. Simply, the uplink system bandwidth is subtracted from the UpPTS.
  • the UE uses the entire uplink system bandwidth to send the SRS.
  • the UE uses the entire uplink.
  • the system bandwidth is sent by the SRS, for example, the bandwidth is BWO-upPTS in the figure.
  • the UE uses the bandwidth of the uplink system bandwidth to remove the PRACH occupied bandwidth in the UpPTS, for example, the bandwidth is BWO-offPRACH in the figure. (BWO-UpPTS minus BWO-PRACH) It can be seen that BWO-UpPTS will be much larger than BWO-Normal.
  • BWO-Normal is the largest system notification as mentioned above. Wide, the bandwidth is limited by the power generation does not cause problems UE.
  • the UE uses the maximum available bandwidth to transmit the SRS in the prior art, that is, the transmission bandwidth of the SRS is expanded.
  • the maximum transmit power of the UE in a unit time is fixed.
  • the wider the transmission bandwidth per unit time the lower the power per unit bandwidth.
  • the UE with poor channel environment may have a power limitation problem at present. This problem directly determines that the signal to noise detection on these bandwidths is relatively low, and the UEs have low channel information with low signal to noise. The poorer the detection capability, the inability to accurately detect channel information. Summary of the invention
  • An object of the embodiments of the present invention is to provide a method, system, and apparatus for determining a bandwidth of an uplink sounding reference signal to implement accurate detection of channel information.
  • an embodiment of the present invention provides a bandwidth determining method, system, and apparatus for an uplink sounding reference signal. This is achieved like this:
  • a method for determining a bandwidth of an uplink sounding reference signal includes: If the SRS is transmitted with the maximum bandwidth level, it is determined whether the SRS is transmitted by using the uplink pilot time slot; when it is determined that the SRS is transmitted by the uplink pilot time slot, and the terminal reaches the power limitation, the SRS is transmitted with the unexpanded SRS bandwidth.
  • a method for determining a bandwidth of an uplink sounding reference signal includes:
  • the terminal If the terminal is notified to send the SRS with the maximum bandwidth level, it is detected whether the terminal has reached the power limit;
  • the terminal When the terminal reaches power limitation, the terminal is notified to send the SRS with the unexpanded SRS bandwidth.
  • a bandwidth determining system for an uplink sounding reference signal comprising: a base station and a terminal, and a towel thereof:
  • the base station includes:
  • a detecting unit configured to detect whether the terminal reaches power limitation when the terminal is notified to send the SRS by using the maximum bandwidth level
  • a notification unit when the detecting unit detects that the terminal reaches power limitation, notifying the terminal to send the SRS by using the unexpanded SRS bandwidth;
  • the terminal includes:
  • the uplink pilot time slot transmission determining unit is configured to determine whether the SRS is sent by using the uplink pilot time slot, and the SRS sending unit is configured to: when the uplink pilot time slot transmission determining unit determines that the SRS is used by the uplink pilot time slot, and The terminal is power limited, and the SRS is transmitted using the unexpanded SRS bandwidth.
  • a bandwidth determining apparatus for an uplink sounding reference signal includes:
  • the uplink pilot time slot transmission determining unit is configured to determine whether the SRS is sent by using the uplink pilot time slot, and the SRS sending unit is configured to: when the uplink pilot time slot transmission determining unit determines that the SRS is used by the uplink pilot time slot, and The terminal is power limited, and the SRS is transmitted with an unexpanded SRS bandwidth level.
  • a bandwidth determining apparatus for an uplink sounding reference signal includes:
  • a detecting unit configured to detect whether the terminal reaches power limitation when the terminal is notified to send the SRS by using the maximum bandwidth level
  • the notification unit when the detecting unit detects that the terminal reaches the power limitation, notifies the terminal to send the SRS by using the unexpanded SRS bandwidth.
  • the technical solution provided by the foregoing embodiment of the present invention can be used to determine whether the SRS is transmitted by using an uplink pilot time slot, and when determining that the SRS is transmitted by using an uplink pilot time slot, and the terminal reaches power limitation,
  • the SRS bandwidth level notified by the system sends the SRS.
  • the SRS transmission bandwidth is not extended to the entire uplink system bandwidth, but is used instead.
  • the SRS bandwidth level notified by the system transmits the SRS, so that the signal-to-noise ratio detected on such a bandwidth can be guaranteed, so that the terminal can accurately detect the channel information.
  • 1 is a frame structure diagram of an LTE TDD in the prior art
  • FIG. 2 is a schematic diagram of a transmission bandwidth of an SRS in the prior art
  • FIG. 3 is a flow chart of an embodiment of a method according to the present invention.
  • FIG. 4 is a flow chart of an embodiment of a method according to the present invention.
  • Figure 5 is a block diagram of an embodiment of a system of the present invention.
  • Figure 6 is a block diagram of an embodiment of an apparatus of the present invention.
  • FIG. 7 is a block diagram of an embodiment of an apparatus of the present invention. detailed description
  • Embodiments of the present invention provide a method, system, and apparatus for determining a bandwidth of an uplink sounding reference signal.
  • the embodiments of the present invention are further described in detail below with reference to the accompanying drawings and embodiments.
  • FIG. 3 shows an embodiment of the method for determining the bandwidth of the uplink sounding reference signal of the present invention.
  • FIG. 3 shows the flow of the embodiment. The embodiment is described from the UE side. As shown in FIG. 3, the method embodiment includes:
  • S301 If the SRS is sent by using the SRS maximum bandwidth level, it is determined whether the SRS is sent by using UpPTS.
  • the SRS can be transmitted using UpPTS or in a regular uplink subframe.
  • the transmission mode in the subsequent steps needs to be taken. Here, it is first necessary to determine whether the SRS is transmitted using UpPTS.
  • the determining, using the SRS maximum bandwidth level to send the SRS may be an indication that the UE receives the SRS bandwidth level from the network side before using the UpPTS to send the SRS.
  • An indication of the stored maximum SRS bandwidth level is an indication of the maximum SRS bandwidth level received from the network side for the first time.
  • S302 When it is determined that the SRS is sent by the UpPTS, and the UE reaches the power limitation, the SRS is sent by using the unexpanded SRS bandwidth.
  • the UE achieves power limitation, which is a necessary step of the embodiment of the present invention, and can be implemented by using various methods. As long as the determination can be implemented, the present invention does not do this. limit.
  • the base station needs to indicate whether the SRS transmission performs frequency hopping for each UE, and indicates whether the signaling indication corresponding to the frequency hopping is valid only for the foregoing bandwidth level when b>0.
  • the mentioned signaling indication can be implemented by multiplexing this frequency hopping switch, but is not limited to the frequency hopping switch.
  • the preset signaling may indicate the corresponding SRS bandwidth level, so that the UE may indicate whether the UE expands the SRS bandwidth according to the signaling indicating the corresponding SRS bandwidth level.
  • the UE is limited in power and can be obtained by receiving the sent signaling indication that the SRS bandwidth is not extended.
  • the lbit signaling indication has two states, such as 0 and 1, and then one of 0 or 1 may be used to indicate that the SRS bandwidth is not extended.
  • the signaling indication of the 2 bits has four states, such as 00, 01, 10, 11. Then, one of the states can be used to indicate that the SRS bandwidth is not extended.
  • the non-expanded SRS bandwidth used may be various, as long as the bandwidth is not an extension of the bandwidth of the SRS.
  • RB Resource Block
  • the value of the SRS bandwidth configuration column determines the m SRS of the corresponding row in the table, b , which determines the specific SRS bandwidth, and its unit is RB.
  • the eight different SRS bandwidth configurations are cell-level SRS bandwidth configurations, and the UE can obtain the pre-broadcast notification from the cell.
  • the SRS is transmitted using the unexpanded SRS bandwidth as shown in Tables 1 to 4 above. For example, for the case of 6 ⁇ A ⁇ 40 , look up Table 1, if the cell-level SRS bandwidth configuration is 0, then in the corresponding row in Table 1! ⁇ is 36, that is, the SRS is transmitted in the UpPTS with a bandwidth of 36 RB.
  • the SRS is not used to extend the SRS bandwidth to the entire uplink system bandwidth, but the SRS bandwidth is not used to transmit the SRS. In this way, the signal-to-noise ratio detected on such a bandwidth can be guaranteed, so that the UE can accurately detect the channel information.
  • the embodiment of the present invention further includes:
  • S303 Send an SRS on the UpPTS according to the preset SRS bandwidth of the preset signaling indication.
  • the signaling indication is 1 bit
  • the lbit signaling indication has two states, such as 0 and 1, and then one of 0 or 1 can be used to indicate that the SRS bandwidth is not extended.
  • another state in 0 or 1 can also be used to indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink.
  • the state indicating that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink indicates that the UE does not reach the power limitation.
  • the signaling indication of the 2 bits is Four states, such as 00, 01, 10, 11.
  • One of the states can be used to indicate that the SRS bandwidth is not extended.
  • one of the other three states can also be used to indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink.
  • the state indicating that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink may indicate that the UE does not reach the power limitation.
  • the signaling indication is 2 bits
  • other idle states indicated by the 2bits signaling may be used to indicate that the SRS bandwidth is expanded to other preset bandwidths. If 11 and 00 are used to indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system and the two states are not extended, the idle 01 and 10 respectively can be used to indicate other preset bandwidths that the SRS bandwidth can be expanded to. Similarly, it indicates that the SRS bandwidth is extended to other preset bandwidths, and it can also indicate that the UE does not reach the power limit.
  • the frequency hopping indication switch is set to notify the UE to send the SRS bandwidth to be extended in the UpPTS.
  • the specific expansion method is similar to that in the prior art, and is not described here.
  • the signaling indicates the preset mode, which is listed below:
  • the SRS bandwidth extension can be indicated by the lbit signaling indication.
  • the information bit can be set to 1 (or set to 0) to indicate SRS bandwidth expansion.
  • the SRS bandwidth extension can be indicated by a 2 bit signaling indication.
  • the information can be set to 11 (or set to 00, or 01, or 10) to indicate SRS bandwidth extension.
  • FIG. 4 shows the flow of the embodiment. As shown in FIG. 4, the method includes:
  • S402 When the terminal reaches power limitation, notify the terminal to send the SRS by using the unexpanded SRS bandwidth. It should be noted that, in this step, the UE achieves power limitation, which is a necessary step of the embodiment of the present invention, and can be implemented by using various methods. As long as the determination can be implemented, the present invention does not do this. limit.
  • the notification terminal sends the SRS by using the SRS bandwidth that is not extended. Specifically, the signaling terminal may notify the terminal to send the SRS by using the SRS bandwidth that is not extended.
  • the base station needs to indicate whether the SRS transmission performs frequency hopping for each UE, and indicates whether the signaling indication corresponding to the frequency hopping is valid only for the foregoing bandwidth level when b>0.
  • the preset signaling can be used to indicate the corresponding SRS bandwidth level, so that the base station can indicate to the UE whether to extend the SRS bandwidth by signaling the corresponding SRS bandwidth level.
  • the UE is power limited, and can be notified to the UE by sending a signaling indication that the SRS bandwidth is not extended.
  • the lbit signaling indication has two states, such as 0 and 1, and then one of 0 or 1 may be used to indicate that the SRS bandwidth is not extended.
  • the signaling indication of the 2 bits has four states, such as 00, 01, 10, 11. Then, one of the states can be used to indicate that the SRS bandwidth is not extended.
  • the non-expanded SRS bandwidth used may be various, as long as the bandwidth is not the bandwidth extension of the SRS. Specifically, the contents of Tables 1 to 4 above may be omitted, and details are not described herein again.
  • the method embodiment may further include:
  • S403 Instruct the terminal to send the corresponding bandwidth on the UpPTS according to the preset signaling indication.
  • the lbit signaling indication has two states, such as 0 and 1, and then one of 0 or 1 can be used to indicate that the SRS bandwidth is not extended.
  • another state in 0 or 1 can also be used to indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink.
  • the state indicating that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink indicates that the UE does not reach the power limitation.
  • the signaling indication of the 2 bits has four states, such as 00, 01, 10, 11.
  • One of the states can be used to indicate that the SRS bandwidth is not extended.
  • one of the other three states can also be used to indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink. It indicates that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink. The UE does not reach power limitation.
  • the signaling indication is 2 bits
  • other idle states indicated by the 2bits signaling may be used to indicate that the SRS bandwidth is expanded to other preset bandwidths. If 11 and 00 are used to indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system and the two states are not extended, the idle 01 and 10 respectively can be used to indicate other preset bandwidths that the SRS bandwidth can be expanded to. Similarly, it indicates that the SRS bandwidth is extended to other preset bandwidths, and it can also indicate that the UE does not reach the power limit.
  • the signaling indication the signaling indication
  • the two states indicated by the lbit signaling indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink or not extended;
  • the two states indicated by the signaling of the 2 bits indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink or not.
  • the method may further include:
  • the idle state indicated by 2bits signaling indicates that the SRS bandwidth is expanded to other preset bandwidths.
  • the two states indicated by the signaling of the 2 bits indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system or not, and the idle state indicated by the 2bits signaling indicates that the SRS bandwidth is extended.
  • the idle state indicated by the 2bits signaling indicates that the SRS bandwidth is extended.
  • FIG. 5 shows a block diagram of the embodiment. As shown in FIG. 5, the system embodiment includes a base station 51 and a terminal 52, where:
  • the base station 51 includes:
  • the detecting unit 511 is configured to detect, when the terminal is configured to use the maximum bandwidth level to send the SRS, whether the terminal is power limited;
  • the notification unit 512 when the detecting unit 511 detects that the terminal reaches the power limitation, notifies the terminal to send the SRS by using the unexpanded SRS bandwidth;
  • the terminal 52 includes:
  • the UpPTS sending determining unit 521 is configured to determine whether the SRS is sent by using the UpPTS;
  • the SRS sending unit 522 is configured to: when the UpPTS transmission determining unit determines that the SRS is sent by using the UpPTS Send, and the UE reaches the power limit, and send the SRS with the unexpanded SRS bandwidth.
  • the notification unit 512 instructs the terminal to send the SRS by using the unsynchronized SRS bandwidth by signaling.
  • the base station when the detecting unit 511 detects that the terminal does not reach the power limitation, the base station further includes:
  • the indicating unit 513 is configured to instruct the terminal to send the SRS on the UpPTS by using the corresponding bandwidth according to the preset signaling indication.
  • the signaling indication preset in the indication unit 513 of the base station indicates that if the signaling indication is 1 bit, the two states indicated by the lbit signaling indicate that the SRS bandwidth is expanded to be uplink of the system. Maximum bandwidth or not expanding two states; or,
  • the two states indicated by the 2bits signaling indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink or not.
  • the idle state indicated by the 2bits signaling indicates that the SRS bandwidth is expanded to other preset bandwidths.
  • the two states indicated by the signaling of the 2bits indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink or not, and the idle state indicated by the 2bits signaling indicates the SRS bandwidth extension.
  • the two states indicated by the signaling of the 2bits indicate that the SRS bandwidth is extended to the maximum bandwidth that can be extended by the system uplink or not
  • the idle state indicated by the 2bits signaling indicates the SRS bandwidth extension.
  • any of the foregoing Tables 5 to 10 is included.
  • the bandwidth used is determined by any one of the foregoing Tables 1 to 4.
  • the terminal 52 when the detecting unit 511 detects that the terminal is power limited, the terminal 52 further includes:
  • the indication receiving unit 523 is configured to receive the sent signaling indication
  • the indication determining unit 524 is configured to determine the SRS bandwidth corresponding to the signaling indication sent by the indication receiving unit.
  • the method for determining the bandwidth of the uplink sounding reference signal by using the bandwidth determining system of the uplink sounding reference signal is similar to the foregoing method, and details are not described herein again.
  • FIG. 6 is a block diagram of the embodiment. As shown in FIG. 6, the apparatus embodiment includes: An UpPTS transmission determining unit 521, configured to determine whether the SRS is sent by using an UpPTS;
  • the SRS sending unit 522 is configured to: when the UpPTS transmission determining unit 521 determines that the SRS is transmitted by the UpPTS, and the UE reaches the power limitation, and sends the SRS by using the unexpanded SRS bandwidth level.
  • the device may further include:
  • the indication receiving unit 523 is configured to receive the sent signaling indication; the received signaling indication is that the base station detects that the terminal where the device is located does not reach the power indication, and the signaling indication is sent;
  • the indication determining unit 524 is configured to determine the SRS bandwidth corresponding to the signaling indication sent by the indication receiving unit.
  • the device is located in the terminal.
  • FIG. 7 is a block diagram of the embodiment. As shown in FIG. 7, the apparatus embodiment includes:
  • the detecting unit 511 is configured to detect, when the terminal is configured to use the maximum bandwidth level to send the SRS, whether the terminal is power limited;
  • the notification unit 512 when the detecting unit detects that the terminal reaches the power limitation, notifies the terminal to send the SRS by using the unsynchronized SRS bandwidth;
  • the notification unit 512 instructs the terminal to send the SRS by using the unsynchronized SRS bandwidth by signaling.
  • the device when the detecting unit 511 detects that the terminal does not reach the power limitation, the device further includes:
  • the indicating unit 513 is configured to instruct the terminal to send the SRS on the UpPTS by using the corresponding bandwidth according to the preset signaling indication.
  • the device is located in a base station.
  • the method for determining the bandwidth of the uplink sounding reference signal by using the bandwidth determining apparatus of the uplink sounding reference signal is similar to the foregoing method, and details are not described herein again.
  • the SRS is sent by using the SRS maximum bandwidth level, it is determined whether the SRS is transmitted by the UpPTS, and when it is determined that the SRS is transmitted by the UpPTS, and the UE reaches the power limitation, the SRS is transmitted with the unexpanded SRS bandwidth, so that For a UE with a poor channel environment, when the SRS is sent in the UpPTS, the SRS is not used to extend the SRS transmission bandwidth to the entire uplink system bandwidth, but the SRS bandwidth level notified by the system is used to transmit the SRS. The signal-to-noise ratio detected on such a bandwidth, so that the UE can accurately detect channel information.
  • the UE can adjust the bandwidth of the SRS transmitted in the UpPTS, thereby avoiding possible power limitation problems, thereby optimizing the performance of the TDD system.
  • each functional unit in each embodiment of the present invention may be integrated into one processing module, or each unit may exist physically separately, or two or more units may be integrated into one module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules.
  • the integrated modules, if implemented in the form of software functional modules and sold or used as separate products, may also be stored in a computer readable storage medium.
  • the above-mentioned storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

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  • Computer Networks & Wireless Communication (AREA)
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Description

上行探测参考信号的带宽确定方法、 系统和装置 技术领域
本发明涉及无线通信技术领域,特别涉及一种上行探测参考信号的带宽确 定方法、 系统和装置。 背景技术
第三代合作伙伴项目 ( The 3rd Generation Partnership Project, 3 GPP )在长 期演进( Long Term Evolution, LTE )计划中, 特别是针对时分双工系统( Time Division Duplex, TDD ), 由于上下行信道具有对称性的特点, 因此釆用上行 探测参考信号(Sounding Reference Signal, SRS )来获得相应频带的下行信道 信息(Channel State Information, CSI ), 以进行信道质量探测, 并支持下行的 无反馈的波束赋形等操作。 并且, SRS能够在多大带宽内发送, 系统就能够测 量下行信道多大带宽内的信道信息。
基于此, 现有技术中在可能的情况下尽量将 SRS釆用最大带宽发送, 以 支持测量下行信道最大带宽内的信道信息。
现有技术规定, LTE TDD中, SRS—般可以位于以下两个位置:
1、 常规上行子帧的最后一个符号上;
2、 特殊子帧中的上行导频时隙 (Uplink Pilot Time Slot, UpPTS )上。 图 1示出了 LTE TDD的帧结构。如图 1所示,一个无线帧包括两个半帧, 每个半帧包括 5个子帧, 也就是一个无线帧包括 10个子帧, 如图中的子帧 0 至子帧 9。 其中, 子帧 1和子帧 6为特殊子帧, 其余子帧为常规子帧, 这些常 规子帧中包括常规上行子帧。 特殊子帧中包括下行导频时隙 ( Downlink Pilot Time Slot, DwPTS )、保护间隔( GP )和上行导频时隙( Uplink Pilot Time Slot, UpPTS )。
系统如果通知釆用最大带宽等级发送 SRS, 而 SRS位于常规上行子帧时, UE釆用系统通知的最大带宽等级发送 SRS。 如图 2中所示, UE釆用系统通 知的最大带宽发送 SRS, 例如系统通知的最大带宽为 BWO— Normal。
系统如果通知釆用最大带宽等级发送 SRS, 而 SRS位于 UpPTS上时, 用 户终端(User Equipment, UE )将对最大等级的带宽进行拓展后发送 SRS。 具 体的, UpPTS 中可能需要承载物理随机接入信道 ( Physical Random Access Channel, PRACH )„ 如果 UpPTS中承载有 PRACH的情况, 因为在 UpPTS时 隙中, SRS和 PRACH在频域上必须完全分开, 即为频分复用的方式, 避免两 者的干扰。 这样, UE釆用上行系统带宽中除去 UpPTS中 PRACH占用带宽后 的带宽来发送 SRS, 简单的说,是釆用上行系统带宽减去该 UpPTS内 PRACH 占用带宽后所得到的带宽来发送 SRS。 如果 UpPTS中不承载 PRACH, UE釆 用整个上行系统带宽发送 SRS。 如图 2中所示, 当 UpPTS中不承载 PRACH 时, UE釆用整个上行系统带宽发送 SRS, 例如带宽为图中的 BWO— UpPTS; 当 UpPTS中承载 PRACH时, UE釆用上行系统带宽中除去 UpPTS中 PRACH 占用带宽后的带宽发送 SRS , 例如带宽为图中的 BWO— offPRACH ( BWO— UpPTS减去 BWO— PRACH )。 可见, BWO— UpPTS将比 BWO— Normal 还大的多。 而 BWO— Normal如前所述为系统通知的最大带宽, 该带宽不会导 致 UE产生功率受限问题。
在对现有技术的研究和实践过程中, 发明人发现现有技术中存在以下问 题:
SRS位于 UpPTS时隙时,现有技术中 UE釆用最大可利用的带宽发送 SRS , 也就是对 SRS的发送带宽进行了拓展。 而 UE—般在单位时间内的最大发射 功率是一定的, 在单位时间内发射带宽越宽, 那么单位带宽上的功率就越低。 该情况下, 部分信道环境较差的 UE这时可能出现功率受限的问题, 该问题直 接决定了这些带宽上检测的信噪比较低,则这些 UE对这些信噪比较低的信道 信息的检测能力也就越差, 导致无法对信道信息进行准确检测。 发明内容
本发明实施例的目的是提供一种上行探测参考信号的带宽确定方法、系统 和装置, 以实现对信道信息的准确检测。
为解决上述技术问题,本发明实施例提供一种上行探测参考信号的带宽确 定方法、 系统和装置。 是这样实现的:
一种上行探测参考信号的带宽确定方法, 包括: 如果釆用最大带宽等级发送 SRS ,判断 SRS是否釆用上行导频时隙发送; 当确定 SRS釆用上行导频时隙发送, 且终端达到功率受限, 釆用不拓展 的 SRS带宽发送 SRS。
一种上行探测参考信号的带宽确定方法, 包括:
如果通知了终端釆用最大带宽等级发送 SRS , 检测终端是否达到功率受 限;
当终端达到功率受限, 通知终端釆用不拓展的 SRS带宽发送 SRS。
一种上行探测参考信号的带宽确定系统, 其特征在于, 包括基站和终端, 其巾:
所述基站包括:
检测单元, 用于在通知了终端釆用最大带宽等级发送 SRS 的情况下, 检 测终端是否达到功率受限;
通知单元, 当检测单元检测到终端达到功率受限,通知终端釆用不拓展的 SRS带宽发送 SRS;
所述终端包括:
上行导频时隙发送判断单元, 用于判断 SRS是否釆用上行导频时隙发送; SRS发送单元, 用于当上行导频时隙发送判断单元确定 SRS釆用上行导 频时隙发送, 且终端达到功率受限, 釆用不拓展的 SRS带宽发送 SRS。
一种上行探测参考信号的带宽确定装置, 包括:
上行导频时隙发送判断单元, 用于判断 SRS是否釆用上行导频时隙发送; SRS发送单元, 用于当上行导频时隙发送判断单元确定 SRS釆用上行导 频时隙发送, 且终端达到功率受限, 釆用不拓展的 SRS带宽等级发送 SRS。
一种上行探测参考信号的带宽确定装置, 包括:
检测单元, 用于在通知了终端釆用最大带宽等级发送 SRS 的情况下, 检 测终端是否达到功率受限;
通知单元, 当检测单元检测到终端达到功率受限,通知终端釆用不拓展的 SRS带宽发送 SRS。
由以上本发明实施例提供的技术方案可见, 判断 SRS是否釆用上行导频 时隙发送, 当确定 SRS釆用上行导频时隙发送, 且终端达到功率受限, 釆用 系统通知的 SRS带宽等级发送 SRS, 这样, 对于部分信道环境较差的终端, 在上行导频时隙中发送的 SRS时, 由于不是将 SRS的发送带宽拓展为整个上 行系统带宽, 而是釆用系统通知的 SRS带宽等级发送 SRS, 这样, 可以保证 在这样的带宽上检测的信噪比, 因此所述终端可以对信道信息进行准确检测。 附图说明
图 1为现有技术中 LTE TDD的帧结构图;
图 2为现有技术中 SRS的发送带宽示意图;
图 3为本发明方法一实施例的流程图;
图 4为本发明方法一实施例的流程图;
图 5为本发明系统实施例的框图;
图 6为本发明一装置实施例的框图;
图 7为本发明一装置实施例的框图。 具体实施方式
本发明实施例提供一种上行探测参考信号的带宽确定方法、 系统和装置。 为了使本技术领域的人员更好地理解本发明方案,下面结合附图和实施方 式对本发明实施例作进一步的详细说明。
图 3 示出了本发明上行探测参考信号带宽确定方法的一个实施例, 图 3 示出了该实施例的流程, 该实施例从 UE侧描述, 如图 3所示, 该方法实施例 包括:
S301 : 如果釆用 SRS最大带宽等级发送 SRS, 判断 SRS是否釆用 UpPTS 发送。
如前所述, SRS可以釆用 UpPTS发送, 也可以在常规上行子帧中发送。 为了避免信道环境较差的 UE在 UpPTS中釆用拓展的最大带宽等级发送 SRS 时引起的功率受限问题, 需要釆取后续步骤中的发送方式。 这里, 首先需要判 断 SRS是否釆用 UpPTS发送。
所述判断的釆用 SRS最大带宽等级发送 SRS, —般可以是标记为 b=0级 别的带宽等级。 还存在 b>0的情况, 即其它 SRS带宽等级, 这些情况在本篇 中不涉及, 因此这里不加以介绍。
所述判断的釆用 SRS 最大带宽等级发送 SRS , 可以是 UE在每次釆用 UpPTS发送 SRS之前, 从网络侧接收到的最大 SRS带宽等级的指示;
或,
存储的最大 SRS带宽等级的指示; 所述存储的最大 SRS带宽等级的指示 为首次从网络侧接收到的最大 SRS带宽等级的指示。
S302: 当确定 SRS釆用 UpPTS发送, 且 UE达到功率受限, 釆用不拓展 的 SRS带宽发送 SRS。
需要说明的是, 该步骤中, UE达到功率受限, 这一点作为本发明实施例 的一个必要步骤, 可以釆用多种方法实现, 只要能够实现这一判断即可, 本发 明这里并不做限制。
现有技术中, 基站需要为每个 UE指示 SRS发送是否进行跳频, 而指示 是否跳频对应的信令指示只对前述 b>0时的带宽等级有效。 对于 b=0的最大 SRS带宽, 只有一个对应的频域位置, 即 b=0时 SRS带宽中心为上行系统带 宽中心位置, 是固定的。 因此, b=0时信令指示无效。 在本发明中, 所提及的 信令指示可以通过复用此跳频开关实现, 但不仅限于跳频开关。
基于此, 可以预置信令指示对应的 SRS带宽等级, 这样, UE可以根据信 令指示对应的 SRS带宽等级得知 UE是否对 SRS带宽进行拓展。
这样, 所述 UE 达到功率受限, 可以通过接收发来的信令指示指示 SRS 带宽不拓展的信息得到。 例如:
对于信令指示为 1比特, 则该 lbit的信令指示具有两种状态, 如 0和 1 , 则, 可以用 0或 1中的一个表示 SRS带宽不拓展。
对于信令指示为 2比特, 则该 2bits的信令指示具有四种状态,如 00, 01 , 10, 11。 则, 可以用其中的一种状态表示 SRS带宽不拓展。
所述釆用的不拓展的 SRS带宽, 可以有多种, 只要所述带宽不是对 SRS 的带宽拓展即可。 这里, 提供几种具体的不拓展的 SRS带宽, 可以由下述表 1 至表 4决定。 表 1. 6≤A ≤40条件下的 SRS带宽 (b=0的情况)
Figure imgf000008_0001
表 2. 40<Λ^≤60条件下的 SRS带宽 (b=0的情况)
Figure imgf000008_0002
表 3. 60 < ^^≤80条件下的 81^带宽 (b=0的情况)
Figure imgf000009_0001
表 4. 80 < A ≤ 110条件下的 SRS带宽 (b=0的情况)
Figure imgf000009_0002
上述 4个表为对于不同的系统带宽定义的不同 SRS带宽。
其中, 为以资源块( Resource Block , RB )表示的整个上行带宽。 RB 是资源分配在频域上的最小单位, 1个 RB频带宽度在现有的规定中为 180kHz。
这里的 4个表格都是 b=0的情况, b=0表示最大带宽等级。 SRS带宽配置这一列的值决定表中对应行的 mSRS,b,即决定具体的 SRS带 宽, 其单位为 RB。 这 8种不同的 SRS带宽配置属小区级的 SRS带宽配置, UE可以从小区预先的广播通知中获得。
举例说明按照上述表 1至表 4中所示釆用不拓展的 SRS带宽发送 SRS。 例如,对于 6≤A40的情况, 查询表 1 ,如果小区级 SRS带宽配置为 0, 则在表 1中对应行中!^^^为 36, 即在 UpPTS中釆用 36RB的带宽发送 SRS。
例如, 对于 40 < A60的情况, 查询表 2, 如果小区级 SRS带宽配置为
1 , 则在表 2中对应行中 mSRS,b为 48, 即在 UpPTS中釆用 48RB的带宽发送 SRS„
例如, 对于 80 < A ≤110的情况, 查询表 3 , 如果小区级 SRS带宽配置为
2, 则在表 3 中对应行中 mSRS,b为 60, 即在 UpPTS中釆用 60RB的带宽发送 SRS„
例如,对于 60 < Λ^≤80的情况,查询表 4,如果小区级 SRS带宽配置为 3 , 则在表 4中对应行中 mSRS,b为 64, 即在 UpPTS中釆用 64RB的带宽发送 SRS。
其它根据表 1至表 4确定 SRS的发送带宽并进行发送的情况与此类似, 不一一举例。
按照本发明上述实施例,对于部分信道环境较差的 UE,在 UpPTS中发送 的 SRS时, 由于不是将 SRS的发送带宽拓展为整个上行系统带宽, 而是釆用 不拓展的 SRS带宽发送 SRS, 这样, 可以保证在这样的带宽上检测的信噪比, 因此所述 UE可以对信道信息进行准确检测。
当确定 SRS釆用 UpPTS发送, 而 UE未达到功率受限, 则本发明实施例 还包括:
S303: 根据预置的信令指示所对应的 SRS带宽在 UpPTS上发送 SRS。 如前所述, 对于信令指示为 1比特, 则该 lbit的信令指示具有两种状态, 如 0和 1 , 则, 可以用 0或 1中的一个表示 SRS带宽不拓展。 这里, 还可以用 0或 1中的另一个状态表示 SRS带宽拓展为系统上行可拓展的最大带宽。表示 SRS带宽拓展为系统上行可拓展的最大带宽的状态可以说明 UE未达到功率受 限。
类似的, 如前所述, 对于信令指示为 2比特, 则该 2bits的信令指示具有 四种状态, 如 00, 01 , 10, 11。 可以用其中的一种状态表示 SRS带宽不拓展。 这里, 还可以用另外三种状态中的一个表示 SRS带宽拓展为系统上行可拓展 的最大带宽。 表示 SRS带宽拓展为系统上行可拓展的最大带宽的状态可以说 明 UE未达到功率受限。
特别的, 对于信令指示为 2比特的情况, 还可以利用 2bits信令指示的其 它的空闲状态表示 SRS带宽拓展为其它预设的带宽。 如前面利用了 11和 00 分别表示 SRS带宽拓展为系统上行可拓展的最大带宽和不拓展两种状态, 则 可以用空闲的 01和 10分别表示 SRS带宽可以拓展为的其它预设的带宽。 类 似的, 表示 SRS带宽拓展为其它预设的带宽, 也可以说明 UE未达到功率受 限。
若未达到功率受限, 则通过将跳频指示开关进行置位, 通知 UE发送 SRS 的带宽在 UpPTS内进行拓展, 具体的拓展方法与现有技术中类似, 在此不再 赘述。
其中信令指示预置的方式, 以下列出几种:
方式 1 : 若信令指示为 lbit信息, 可以通过 lbit的信令指示表示 SRS带 宽扩展。 例如可将该信息位置位 1 (或置为 0 )表示 SRS带宽拓展。
方式 2: 若信令指示为 2bits信息, 可以通过 2bits的信令指示表示 SRS带 宽扩展。 例如可将该信息为置位 11 (或置为 00, 或 01 , 或 10 )表示 SRS带 宽拓展。
方式 3: 当信令指示为 2bits信息, 在方式 2的基础上, 可以将进一步对 最大的带宽等级进行更精细的控制, 如利用 2bits信令指示的空闲状态表示其 它 SRS带宽, 例如下表 5表 10所示。
以下通过表 5至表 10给出几种通过信令指示对 SRS带宽等级进行更精细 控制的方式。
表 5. 上行系统带宽 A = 6RB时, 信令指示与 SRS发送带宽的对应关系 信令指示值 SRS带宽 b=0
Figure imgf000012_0001
该表中,由于 1个 PRACH占用 6个 RB,所以 NRA个 PRACH共占用 6*NRA 个 RB , 这样, 整个上行系统带宽 Ν^减去 NRA个 PRACH占用的 6*NRA个 RB 后, 即为 SRS在 UpPTS中的发送带宽。 特别的, 当
Figure imgf000012_0002
的情况, 则 ^L-6NRA? 也就是釆用整个上行系统带宽。 下面的表与此类似。 表 6. 宽的对应关系
Figure imgf000012_0003
Figure imgf000012_0006
表 7. 上行系统带宽
Figure imgf000012_0004
时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000012_0007
表 8. 宽的对应关系
Figure imgf000012_0005
表 9. 上行系统带宽 A = 75RB时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000013_0001
表 10.上行系统带宽 NR U B L = 100RB时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000013_0002
需要说明的是, 上述仅列出信令指示的设置的几种形式, 而本领域技术人 员应当知道, 这样的列举并非限定, 还存在其它多种变化。
通过 S303 , 利用 b=0状态下信令指示的未使用状态来指示带宽等级, UE 可以调整在 UpPTS内发送 SRS的带宽, 从而避免了可能的功率受限问题, 进 而可以优化 TDD系统性能。
以下从基站的角度描述本发明上行探测参考信号的带宽确定方法实施例, 图 4示出了该实施例的流程, 如图 4所示, 包括:
S401 :如果通知了终端釆用最大带宽等级发送 SRS ,检测终端是否达到功 率受限。
所述判断的釆用 SRS最大带宽等级发送 SRS, —般可以是标记为 b=0级 别的带宽等级。 还存在 b>0的情况, 即其它 SRS带宽等级。
S402: 当终端达到功率受限, 通知终端釆用不拓展的 SRS带宽发送 SRS。 需要说明的是, 该步骤中, UE达到功率受限, 这一点作为本发明实施例 的一个必要步骤, 可以釆用多种方法实现, 只要能够实现这一判断即可, 本发 明这里并不做限制。 所述通知终端釆用不拓展的 SRS带宽发送 SRS , 具体的, 可以通过信令 指示通知终端釆用不拓展的 SRS带宽发送 SRS。
现有技术中, 基站需要为每个 UE指示 SRS发送是否进行跳频, 而指示 是否跳频对应的信令指示只对前述 b>0时的带宽等级有效。 对于 b=0的最大 SRS带宽, 只有一个对应的频域位置, 即 b=0时 SRS带宽中心为上行系统带 宽中心位置, 是固定的。 因此, b=0时信令指示无效。
基于此, 可以预置信令指示对应的 SRS带宽等级, 这样, 基站可以通过 信令指示对应的 SRS带宽等级通知 UE是否对 SRS带宽进行拓展。
这样, 所述 UE达到功率受限, 可以通过发送信令指示指示 SRS带宽不 拓展的信息通知给 UE得到。 例如:
对于信令指示为 1比特, 则该 lbit的信令指示具有两种状态, 如 0和 1 , 则, 可以用 0或 1中的一个表示 SRS带宽不拓展。
对于信令指示为 2比特, 则该 2bits的信令指示具有四种状态,如 00, 01 , 10, 11。 则, 可以用其中的一种状态表示 SRS带宽不拓展。
所述釆用的不拓展的 SRS带宽, 可以有多种, 只要所述带宽不是对 SRS 的带宽拓展即可。 具体可以如前面的表 1至表 4的内容, 这里不再赘述。
特别的, 当检测到所述终端未达到功率受限, 该方法实施例之后还可以包 括:
S403 : 根据预置的信令指示指示终端釆用对应的带宽在 UpPTS 上发送
SRS„
如前所述, 对于信令指示为 1比特, 则该 lbit的信令指示具有两种状态, 如 0和 1 , 则, 可以用 0或 1中的一个表示 SRS带宽不拓展。 这里, 还可以用 0或 1中的另一个状态表示 SRS带宽拓展为系统上行可拓展的最大带宽。表示 SRS带宽拓展为系统上行可拓展的最大带宽的状态可以说明 UE未达到功率受 限。
类似的, 如前所述, 对于信令指示为 2比特, 则该 2bits的信令指示具有 四种状态, 如 00, 01 , 10, 11。 可以用其中的一种状态表示 SRS带宽不拓展。 这里, 还可以用另外三种状态中的一个表示 SRS带宽拓展为系统上行可拓展 的最大带宽。 表示 SRS带宽拓展为系统上行可拓展的最大带宽的状态可以说 明 UE未达到功率受限。
特别的, 对于信令指示为 2比特的情况, 还可以利用 2bits信令指示的其 它的空闲状态表示 SRS带宽拓展为其它预设的带宽。 如前面利用了 11和 00 分别表示 SRS带宽拓展为系统上行可拓展的最大带宽和不拓展两种状态, 则 可以用空闲的 01和 10分别表示 SRS带宽可以拓展为的其它预设的带宽。 类 似的, 表示 SRS带宽拓展为其它预设的带宽, 也可以说明 UE未达到功率受 限。
这样, 该方法实施例中, 所述信令指示,
若信令指示为 1比特, 通过该 lbit的信令指示的两种状态表示 SRS带宽 拓展为系统上行可拓展的最大带宽或不拓展两种状态; 或,
若信令指示为 2比特, 通过该 2bits的信令指示的两种状态表示 SRS带宽 拓展为系统上行可拓展的最大带宽或不拓展两种状态。
该方法实施例中, 若信令指示为 2比特信息, 还可以包括:
利用 2bits信令指示的空闲状态表示 SRS带宽拓展为其它预设的带宽。 该方法实施例中, 所述通过 2bits的信令指示的两种状态表示 SRS带宽扩 展为系统上行可拓展的最大带宽或不拓展两种状态, 并利用 2bits信令指示的 空闲状态表示 SRS带宽拓展为其它预设的带宽, 具体与前述表 5至表 10中的 内容类似, 也可以由表 5至表 10中任一方式确定。 在此不再赘述。 以下介绍本发明上行探测参考信号的发送系统实施例,图 5示出了该实施 例的框图, 如图 5中, 所述系统实施例包括基站 51和终端 52, 其中:
所述基站 51包括:
检测单元 511 , 用于在通知了终端釆用最大带宽等级发送 SRS的情况下, 检测终端是否达到功率受限;
通知单元 512, 当检测单元 511检测到终端达到功率受限, 通知终端釆用 不拓展的 SRS带宽发送 SRS;
所述终端 52包括:
UpPTS发送判断单元 521 , 用于判断 SRS是否釆用 UpPTS发送;
SRS发送单元 522,用于当 UpPTS发送判断单元确定 SRS釆用 UpPTS发 送, 且 UE达到功率受限, 釆用不拓展的 SRS带宽发送 SRS。
优选地, 所述系统中, 所述通知单元 512通过信令指示通知终端釆用不拓 展的 SRS带宽发送 SRS。
优选地, 所述系统中, 当检测单元 511检测到终端未达到功率受限, 所述 基站还包括:
指示单元 513 , 用于根据预置的信令指示指示终端釆用对应的带宽在 UpPTS上发送 SRS。
优选地, 所述系统中, 所述基站的指示单元 513中预置的信令指示, 若信令指示为 1比特, 该 lbit的信令指示的两种状态表示 SRS带宽拓展 为系统上行可拓展的最大带宽或不拓展两种状态; 或,
若信令指示为 2比特, 该 2bits的信令指示的两种状态表示 SRS带宽拓展 为系统上行可拓展的最大带宽或不拓展两种状态。
优选地,所述系统中,如果所述指示单元 513中预置的信令指示为 2比特, 所述 2bits信令指示的空闲状态表示 SRS带宽拓展为其它预设的带宽。
优选地, 所述系统中, 所述 2bits的信令指示的两种状态表示 SRS带宽扩 展为系统上行可拓展的最大带宽或不拓展两种状态, 且 2bits信令指示的空闲 状态表示 SRS带宽拓展为其它预设的带宽, 包括前述表 5至表 10中的任一方 式。
优选地,所述系统中, 当所述终端釆用的不拓展的 SRS带宽发送 SRS时, 釆用的带宽由前述表 1至表 4中的任一决定。
优选地, 所述系统中, 当检测单元 511检测到终端达到功率受限, 所述终 端 52还包括:
指示接收单元 523 , 用于接收发来的信令指示;
指示确定单元 524, 用于确定所述指示接收单元发来的信令指示所对应的 SRS带宽。
利用上述上行探测参考信号的带宽确定系统实施例实现上行探测参考信 号的带宽确定方法与前述方法类似, 在此不再赘述。
以下介绍本发明上行探测参考信号的带宽确定装置实施例,图 6示出了该 实施例的框图, 如图 6所示, 所述装置实施例包括: UpPTS发送判断单元 521 , 用于判断 SRS是否釆用 UpPTS发送;
SRS发送单元 522,用于当 UpPTS发送判断单元 521确定 SRS釆用 UpPTS 发送, 且 UE达到功率受限, 釆用不拓展的 SRS带宽等级发送 SRS。
优选地, 所述装置中, 还可以包括:
指示接收单元 523 , 用于接收发来的信令指示; 所述接收的信令指示为基 站检测所述装置所在的终端未达到功率受限的情况下发来的信令指示;
指示确定单元 524, 用于确定所述指示接收单元发来的信令指示所对应的 SRS带宽。 优选地, 所述装置位于终端中。
以下介绍本发明上行探测参考信号的带宽确定装置实施例,图 7示出了该 实施例的框图, 如图 7所示, 所述装置实施例包括:
检测单元 511 , 用于在通知了终端釆用最大带宽等级发送 SRS的情况下, 检测终端是否达到功率受限;
通知单元 512, 当检测单元检测到终端达到功率受限, 通知终端釆用不拓 展的 SRS带宽发送 SRS;
优选地, 所述装置中, 所述通知单元 512通过信令指示通知终端釆用不拓 展的 SRS带宽发送 SRS。
优选地, 所述装置中, 当检测单元 511检测到终端未达到功率受限, 所述 装置还包括:
指示单元 513 , 用于根据预置的信令指示指示终端釆用对应的带宽在 UpPTS上发送 SRS。
优选地, 所述装置位于基站中。
利用上述上行探测参考信号的带宽确定装置实施例实现上行探测参考信 号的带宽确定方法与前述方法类似, 在此不再赘述。
由以上实施例可见, 如果釆用 SRS最大带宽等级发送 SRS , 判断 SRS是 否釆用 UpPTS发送, 当确定 SRS釆用 UpPTS发送, 且 UE达到功率受限, 釆 用不拓展的 SRS带宽发送 SRS ,这样,对于部分信道环境较差的 UE,在 UpPTS 中发送的 SRS时, 由于不是将 SRS的发送带宽拓展为整个上行系统带宽, 而 是釆用系统通知的 SRS带宽等级发送 SRS , 这样, 可以保证在这样的带宽上 检测的信噪比, 因此所述 UE可以对信道信息进行准确检测。 另外, 若未达到功率受限, 则通过将跳频指示开关进行置位, 通知 UE发 送 SRS的带宽在 UpPTS内进行拓展, 并利用 b=0状态下信令指示的未使用状 态来指示带宽等级, UE可以调整在 UpPTS内发送 SRS的带宽, 从而避免了 可能的功率受限问题, 进而可以优化 TDD系统性能。
本技术领域的普通技术人员可以理解实现上述实施例方法携带的全部或 部分步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种 计算机可读存储介质中, 该程序在执行时, 包括方法实施例的步骤之一或其组 合。
此外, 在本发明各个实施例中的各功能单元可以集成在一个处理模块中, 也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个模块 中。 上述集成的模块既可以釆用硬件的形式实现,也可以釆用软件功能模块的 形式实现。所述集成的模块如果以软件功能模块的形式实现并作为独立的产品 销售或使用时, 也可以存储在一个计算机可读取存储介质中。
上述提到的存储介质可以是只读存储器, 磁盘或光盘等。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通 技术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干改进和润饰, 这些改进和润饰也应视为本发明的保护范围。

Claims

权利要求书
1、 一种上行探测参考信号的带宽确定方法, 其特征在于, 包括: 如果釆用最大带宽等级发送 SRS ,判断 SRS是否釆用上行导频时隙发送; 当确定 SRS釆用上行导频时隙发送, 且终端达到功率受限, 釆用不拓展 的 SRS带宽发送 SRS。
2、 如权利要求 1所述的方法, 其特征在于, 所述釆用最大带宽等级, 包 括:
在每次釆用上行导频时隙发送 SRS之前, 从网络侧接收到的最大 SRS带 宽等级的指示;
或,
存储的最大 SRS带宽等级的指示; 所述存储的最大 SRS带宽等级的指示 为从网络侧接收到的最大 SRS带宽等级的指示。
3、 如权利要求 1或 2所述的方法, 其特征在于, 所述釆用不拓展的 SRS 带宽, 由下述表 1至表 4中的任一决定:
表^ 6≤Λ^≤40条件下的 SRS带宽
Figure imgf000019_0001
表 2. 40 < A ≤ 60条件下的 SRS带宽
Figure imgf000020_0001
表 3. 60 < A ≤ 80条件下的 SRS带宽
Figure imgf000020_0002
10 表 4. 80 < A ≤110条件下的 SRS带宽
Figure imgf000021_0001
其中, nRB为以资源块表示的整个上行带宽, b=0表示最大带宽等级, mSRS,b 表示 SRS釆用的带宽, SRS带宽配置包括小区级的 SRS带宽配置。
4、 如权利要求 1所述的方法, 其特征在于, 所述终端达到功率受限, 通 过接收基站发来的信令指示 SRS发送釆用不拓展的带宽进行。
5、 如权利要求 1所述的方法, 其特征在于, 所述方法还包括:
当确定 SRS釆用上行导频时隙发送, 而终端未达到功率受限, 根据预置 的信令指示所对应的 SRS带宽在上行导频时隙上发送 SRS。
6、 如权利要求 4或 5所述的方法, 其特征在于, 所述信令指示, 若信令指示釆用 1比特信息表示, 通过该 1比特的两种状态表示 SRS带 宽拓展为系统上行可拓展的最大带宽和不拓展两种状态; 或,
若信令指示釆用 2比特信息表示, 通过该 2比特的两种状态表示 SRS带 宽拓展为系统上行可拓展的最大带宽或不拓展两种状态。
7、 如权利要求 6所述的方法, 其特征在于, 若信令指示为 2比特信息, 所述方法还包括:
利用 2比特信令指示的空闲状态表示 SRS带宽拓展为其它预设的带宽。
8、 如权利要求 7所述的方法, 其特征在于, 所述通过该 2比特的信令指 示表示 SRS带宽扩展为系统上行可拓展的最大带宽或不拓展, 并利用 2比特 信令指示的空闲状态表示 SRS带宽拓展为其它带宽, 包括下述表 5至表 10中 的任一方式:
表 5. 的对应关系
Figure imgf000022_0003
表 6. 的对应关系
Figure imgf000022_0001
Figure imgf000022_0004
表 7. 的对应关系
Figure imgf000022_0005
表 8. 的对应关系
Figure imgf000022_0002
表 9. 上行系统带宽 A = 75RB时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000023_0001
表 10.上行系统带宽 A = 100RB时,信令指示与 SRS发送带宽的对应关系
Figure imgf000023_0002
9、 一种上行探测参考信号的带宽确定方法, 其特征在于, 包括: 如果通知了终端釆用最大带宽等级发送 SRS , 检测终端是否达到功率受 当终端达到功率受限, 通知终端釆用不拓展的 SRS带宽发送 SRS。
10、 如权利要求 9所述的方法, 其特征在于, 所述通知终端釆用不拓展的 SRS带宽发送 SRS包括:
通过信令指示通知终端釆用不拓展的 SRS带宽发送 SRS。
11、 如权利要求 9所述的方法, 其特征在于, 当检测到所述终端未达到功 率受限, 所述方法还包括:
根据预置的信令指示指示终端釆用对应的带宽在上行导频时隙上发送 SRS„
12、 如权利要求 10或 11所述的方法, 其特征在于, 所述信令指示, 若信令指示为 1比特, 通过该 1比特的信令指示的两种状态表示 SRS带 宽拓展为系统上行可拓展的最大带宽或不拓展两种状态; 或, 若信令指示为 2比特, 通过该 2比特的信令指示的两种状态表示 SRS带 宽拓展为系统上行可拓展的最大带宽或不拓展两种状态。
13、 如权利要求 12所述的方法, 其特征在于, 若信令指示为 2比特信息, 所述方法还包括:
利用 2比特信令指示的空闲状态表示 SRS带宽拓展为其它预设的带宽。
14、 如权利要求 13所述的方法, 其特征在于, 所述通过 2比特的信令指 示的两种状态表示 SRS带宽扩展为系统上行可拓展的最大带宽或不拓展两种 状态, 并利用 2比特信令指示的空闲状态表示 SRS带宽拓展为其它预设的带 宽, 包括下述表 5至表 10中的任一方式:
表 5. 上行系统带宽^^ = 6^时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000024_0002
表 6. 上行系统带宽 A = 15RB时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000024_0003
表 7. 上行系统带宽 A = 25RB时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000024_0001
表 8. 宽的对应关系
Figure imgf000025_0002
表 9. 宽的对应关系
Figure imgf000025_0001
Figure imgf000025_0003
表 10.上行系统带宽 A = 100RB时,信令指示与 SRS发送带宽的对应关系
Figure imgf000025_0004
15、 一种上行探测参考信号的带宽确定系统, 其特征在于, 包括基站和终 端, 其中:
所述基站包括:
检测单元, 用于在通知了终端釆用最大带宽等级发送 SRS 的情况下, 检 测终端是否达到功率受限;
通知单元, 当检测单元检测到终端达到功率受限,通知终端釆用不拓展的 SRS带宽发送 SRS;
所述终端包括:
上行导频时隙发送判断单元, 用于判断 SRS是否釆用上行导频时隙发送; SRS发送单元, 用于当上行导频时隙发送判断单元确定 SRS釆用上行导 频时隙发送, 且终端达到功率受限, 釆用不拓展的 SRS带宽发送 SRS。
16、 如权利要求 15所述的系统, 其特征在于, 所述通知单元通过信令指 示通知终端釆用不拓展的 SRS带宽发送 SRS。
17、 如权利要求 15所述的系统, 其特征在于, 当检测单元检测到终端未 达到功率受限, 所述基站还包括:
指示单元,用于根据预置的信令指示指示终端釆用对应的带宽在上行导频 时隙上发送 SRS。
18、 如权利要求 17所述的系统, 其特征在于, 所述基站的指示单元中预 置的信令指示,
若信令指示为 1比特, 该 1比特的信令指示的两种状态表示 SRS带宽拓 展为系统上行可拓展的最大带宽或不拓展两种状态; 或,
若信令指示为 2比特, 该 2比特的信令指示的两种状态表示 SRS带宽拓 展为系统上行可拓展的最大带宽或不拓展两种状态。
19、 如权利要求 18所述的系统, 其特征在于, 如果所述指示单元中预置 的信令指示为 2比特, 所述 2比特信令指示的空闲状态表示 SRS带宽拓展为 其它预设的带宽。
20、 如权利要求 19所述的系统, 其特征在于, 所述 2比特的信令指示的 两种状态表示 SRS带宽扩展为系统上行可拓展的最大带宽或不拓展两种状态, 且 2比特信令指示的空闲状态表示 SRS带宽拓展为其它预设的带宽, 包括下 述表 5至表 10中的任一方式:
表 5. 上行系统带宽 A = 6RB时, 信令指示与 SRS发送带宽的对应关系
Figure imgf000026_0001
表 6. 宽的对应关系
Figure imgf000027_0002
表 7. 宽的对应关系
Figure imgf000027_0003
表 8. 宽的对应关系
Figure imgf000027_0004
表 9. 宽的对应关系
Figure imgf000027_0001
Figure imgf000027_0005
表 10.上行系统带宽 A = 100RB时,信令指示与 SRS发送带宽的对应关系
Figure imgf000028_0001
21、 如权利要求 15所述的系统, 其特征在于, 当所述终端釆用的不拓展 的 SRS带宽发送 SRS时, 釆用的带宽由下述表 1至表 4中的任一决定:
表 1. 6≤Λ^≤40条件下的 SRS带宽
Figure imgf000028_0002
表 2. 40 < A ≤ 60条件下的 SRS带宽
Figure imgf000029_0001
表 3. 60 < A ≤ 80条件下的 SRS带宽
Figure imgf000029_0002
10 表 4. 80 < A ≤110条件下的 SRS带宽
Figure imgf000030_0001
其中, nRB为以资源块表示的整个上行带宽, b=0表示最大带宽等级, mSRS,b 表示 SRS釆用的带宽, SRS带宽配置包括小区级的 SRS带宽配置。
22、 如权利要求 17、 18或 19所述的系统, 其特征在于, 当检测单元检测 到终端达到功率受限, 所述终端还包括:
指示接收单元, 用于接收发来的信令指示;
指示确定单元,用于确定所述指示接收单元发来的信令指示所对应的 SRS 带宽。
23、 一种上行探测参考信号的带宽确定装置, 其特征在于, 包括: 上行导频时隙发送判断单元, 用于判断 SRS是否釆用上行导频时隙发送; SRS发送单元, 用于当上行导频时隙发送判断单元确定 SRS釆用上行导 频时隙发送, 且终端达到功率受限, 釆用不拓展的 SRS带宽等级发送 SRS。
24、 如权利要求 23所述的装置, 其特征在于, 还包括:
指示接收单元, 用于接收发来的信令指示; 所述接收的信令指示为基站检 测所述装置所在的终端未达到功率受限的情况下发来的信令指示;
指示确定单元,用于确定所述指示接收单元发来的信令指示所对应的 SRS 带宽。
25、如权利要求 23或 24所述的装置,其特征在于,所述装置位于终端中。
26、 一种上行探测参考信号的带宽确定装置, 其特征在于, 包括: 检测单元, 用于在通知了终端釆用最大带宽等级发送 SRS 的情况下, 检 测终端是否达到功率受限;
通知单元, 当检测单元检测到终端达到功率受限,通知终端釆用不拓展的 SRS带宽发送 SRS。
27、 如权利要求 26所述的装置, 其特征在于, 所述通知单元通过信令指 示通知终端釆用不拓展的 SRS带宽发送 SRS。
28、 如权利要求 26所述的装置, 其特征在于, 当检测单元检测到终端未 达到功率受限, 所述装置还包括:
指示单元,用于根据预置的信令指示指示终端釆用对应的带宽在上行导频 时隙上发送 SRS。
29、 如权利要求 26、 27或 28所述的装置, 其特征在于, 所述装置位于基 站中。
PCT/CN2009/073007 2008-07-31 2009-07-30 上行探测参考信号的带宽确定方法、系统和装置 WO2010012238A1 (zh)

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MX2011001042A MX2011001042A (es) 2008-07-31 2009-07-30 Metodo, sistema y dispositivo para determinar la anchura de banda de la señal de referencia de sonido de enlace ascendente.
US13/056,911 US9125205B2 (en) 2008-07-31 2009-07-30 Method, system and device for determining bandwidth of uplink sounding reference signal
EP09802431.8A EP2315482B1 (en) 2008-07-31 2009-07-30 Method, system and device for determining the transmission bandwidth of an uplink sounding reference signal
KR1020117004826A KR101218138B1 (ko) 2008-07-31 2009-07-30 업링크 사운딩 기준 신호의 대역폭의 결정 방법, 시스템 및 장치
JP2011520311A JP6082184B2 (ja) 2008-07-31 2009-07-30 アップリンクサウンディングリファレンス信号の帯域幅確定方法、システムおよび装置
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US9763236B2 (en) 2017-09-12
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