WO2016107549A1 - 一种参考信号的配置方法及装置、基站和用户设备 - Google Patents

一种参考信号的配置方法及装置、基站和用户设备 Download PDF

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Publication number
WO2016107549A1
WO2016107549A1 PCT/CN2015/099439 CN2015099439W WO2016107549A1 WO 2016107549 A1 WO2016107549 A1 WO 2016107549A1 CN 2015099439 W CN2015099439 W CN 2015099439W WO 2016107549 A1 WO2016107549 A1 WO 2016107549A1
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Prior art keywords
reference signal
uplink
user equipment
downlink
uplink reference
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English (en)
French (fr)
Inventor
陈亚迷
李刚
张兴
张佳鑫
李荣鹏
王文博
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China Mobile Communications Group Co Ltd
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China Mobile Communications Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present disclosure relates to signal measurement technologies in the field of communications, and in particular, to a method and apparatus for configuring reference signals, a base station, and a user equipment.
  • the reference signal can be used for network site/cell/carrier search, discovery, selection, reselection, access and handover, as well as user uplink and downlink control and traffic channel estimation and quality measurement.
  • users can be based on the main LTE system based on the primary synchronization signal/auxiliary synchronization signal, cell-specific reference signal (Cell- Specific reference signal (CRS) and other downlink symbols and reference signals are used for small base station discovery.
  • Cell- Specific reference signal Cell- Specific reference signal
  • the small base station can be implemented by monitoring the user's uplink sounding reference signal (SRS).
  • SRS uplink sounding reference signal
  • the small base station in the future can also realize the discovery of the small base station by monitoring the uplink SRS of the user through the small base station, so as to solve the broadcast burden and interference problem of a large number of downlink reference signals caused by the dense small stations in the future.
  • the relationship between the small cell corresponding to the small cell and the user will be more equal, mainly reflected in the fact that the small base station and the user are more similar in related configurations, such as antenna and power.
  • the uplink and downlink channel reciprocity will be more sufficient.
  • the uplink reference signal and the downlink reference signal are used to replace the downlink reference signal, and the uplink reference signal and the downlink reference signal are more interchangeable in channel measurement, and the uplink measurement is used instead of the downlink. Measurements are also more feasible.
  • the uplink reference signal sent by the user equipment poses a challenge to the uplink resources of the network and the uplink transmit power of the user.
  • the uplink signal should At the same time, so the allocation of uplink signals is not independent of each small station, but it is possible that multiple stations share the signal resource pool. That is to say, the control of the uplink reference signal is more of a virtual cell control effect, which reduces the multiplexing degree of the uplink resources and reduces the number of available uplink resources. Therefore, it may lead to the shortage of uplink resources.
  • the power of the user itself is also limited. Upstream reference signal measurements are not always efficient.
  • the embodiments of the present disclosure provide a method and an apparatus for configuring a reference signal, a base station, and a user equipment.
  • the embodiment of the present disclosure provides a method for configuring a reference signal, the method comprising:
  • the network device When the network side determines that the uplink air interface resource is insufficient, the network device sends a downlink reference signal to the user equipment, and notifies the corresponding user equipment to perform measurement according to the downlink reference signal, and notifies the corresponding user equipment to cancel or reduce the transmission of the uplink reference signal.
  • the network side determines that the uplink air interface resources are insufficient, including:
  • the network side determines that the uplink reference signal is denser than the preset threshold, or determines that the power headroom of the user equipment is lower than the preset threshold.
  • the method further includes:
  • the network side determines that the density of the uplink reference signal is lower than the preset threshold, and the power headroom of the user equipment is higher than the preset threshold, the user equipment is notified to send the uplink reference signal.
  • the network side notifies the user equipment to send an uplink reference signal, including:
  • the network side configures the user equipment to send an uplink reference signal, and allocates resources required for transmitting the uplink reference signal.
  • the method for determining the density of the uplink reference signal is any one of the following:
  • the upper and lower weights are determined by calculating the value of the uplink resource that needs to be configured when the uplink weight is measured based on the uplink reference signal, or the downlink resource that needs to be configured when the downlink weight is measured based on the downlink reference signal. It is related to uplink and downlink transmission power, or the uplink and downlink weights are related to uplink and downlink load ratios, or the uplink and downlink weights are related to network settings.
  • the method for determining a power headroom of the user equipment includes:
  • the network side detects the power headroom of each user equipment based on the power headroom report reported by each user equipment.
  • the range of determining the density of the uplink reference signal is any one of the following:
  • the uplink reference signal and the downlink reference signal are used for channel measurement, channel estimation, site discovery, and/or user discovery.
  • the corresponding user equipment includes: a user equipment to discover a site, or a user equipment that is already receiving a site service.
  • the user equipment that wants to discover the station cancels the uplink reference signal transmission, and reduces the uplink reference signal transmission for the user equipment that has already received the site service. Among them, all user equipments cancel the uplink reference signal transmission.
  • the notification corresponding to the user equipment includes triggering the user equipment to change the existing reference signal behavior by means of broadcast, multicast, or unicast.
  • the macro reference station pre-schedules the uplink reference signal when the uplink reference signal and the downlink reference signal are used for station discovery.
  • the network side switches the downlink reference signal mode to the uplink reference signal mode.
  • the embodiment of the present disclosure further provides a method for configuring a reference signal, the method comprising:
  • the user equipment receives the downlink reference signal sent by the network side when determining that the uplink air interface resource is insufficient, and after receiving the notification sent by the network side, performs measurement according to the downlink reference signal, and cancels or reduces transmission of the uplink reference signal.
  • the uplink air interface resources are insufficient, including:
  • the uplink reference signal is denser than the preset threshold, or the power headroom of the user equipment is lower than the preset threshold.
  • the method further includes:
  • the user equipment After receiving the notification sent by the network side, the user equipment sends an uplink reference signal;
  • the notification is sent when the network side determines that the density of the uplink reference signal is lower than a preset threshold and the power headroom of all user equipments is higher than a preset threshold.
  • the embodiment of the present disclosure further provides a configuration device for a reference signal, the device comprising: a determining module and a processing module; wherein
  • the determining module is configured to trigger the processing module when the uplink air interface resource is insufficient;
  • the processing module is configured to send a downlink reference signal to all user equipments, and notify all the user equipments to perform measurement according to the downlink reference signal, and notify all user equipments to cancel or reduce transmission of the uplink reference signal.
  • the determining module determines that the uplink air interface resource is insufficient, and includes:
  • the strength of the uplink reference signal is determined to be higher than a preset threshold, or the power headroom of the user equipment is determined to be lower than a preset threshold.
  • the determining module is further configured to: when the strength of the uplink reference signal is lower than a preset threshold, and the power headroom of all user equipments is higher than a preset threshold, triggering the processing module;
  • the processing module is further configured to notify all user equipments to send an uplink reference signal.
  • the determining module determines the density of the uplink reference signal to include any one of the following methods:
  • the determining module determines, by counting, the number of uplink resources that need to be configured when performing measurement based on the uplink reference signal;
  • the determining module determines by counting the number of user equipments that send uplink reference signals
  • the determining module determines, by using, the value of the uplink resource that needs to be configured when the uplink weight is measured based on the uplink reference signal, or the downlink resource that needs to be configured when the downlink reference signal is used for measurement.
  • the downlink weight is related to the uplink and downlink transmission power, or the uplink and downlink weights are related to the uplink and downlink load ratios, or the uplink and downlink weights are related to the network setting.
  • Embodiments of the present disclosure also provide a base station that includes the apparatus described above.
  • the embodiment of the present disclosure further provides a user equipment, where the user equipment includes: a receiving module and a processing module;
  • the receiving module is configured to receive a downlink reference signal that is sent by the network side when determining that the uplink air interface resource is insufficient, and triggers the processing module after receiving the notification sent by the network side;
  • the processing module is configured to perform measurement according to the downlink reference signal, and cancel or reduce transmission of an uplink reference signal.
  • the uplink air interface resources are insufficient, including:
  • the uplink reference signal is denser than the preset threshold, or the power headroom of the user equipment is lower than the preset threshold.
  • the user equipment further includes: a sending module, configured to send an uplink reference signal after the receiving module receives the notification sent by the network side;
  • the notification is sent when the network side determines that the density of the uplink reference signal is lower than a preset threshold and the power headroom of all user equipments is higher than a preset threshold.
  • the network side When the network side determines that the uplink air interface resource is insufficient, the network side sends a downlink reference signal to the user equipment, and notifies the corresponding user equipment to perform measurement according to the downlink reference signal, and the method for configuring the reference signal is provided by the embodiment of the present disclosure. Notifying the corresponding user equipment to cancel or reduce the transmission of the uplink reference signal.
  • the embodiment of the present disclosure fully utilizes the reciprocity of the uplink and downlink channels.
  • the downlink reference signal is used instead of the uplink reference signal for measurement, and the uplink reference signal is used to improve the pollution state of the downlink reference signal, thereby solving the uplink reference signal for uplink.
  • Resources and the pressure caused by the transmission power of user equipment can also improve the interference environment of the network, improve the channel measurement quality, Reduce the reference signal transmission overhead.
  • FIG. 1 is a flowchart of implementing a method for configuring a reference signal according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of implementing a method for configuring a reference signal according to another embodiment of the present disclosure
  • FIG. 3 is a schematic structural diagram of a device for configuring a reference signal according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of a user equipment according to an embodiment of the present disclosure.
  • the network device when the network side determines that the uplink air interface resource is insufficient, the network device sends a downlink reference signal to the user equipment, and notifies the corresponding user equipment to perform measurement according to the downlink reference signal, and notifies the corresponding user equipment to cancel or reduce the sending of the uplink reference signal.
  • the density of the uplink reference signal is: the density of the uplink reference signal that needs to be configured when the measurement is performed based on the uplink reference signal; the corresponding user equipment is: all user equipments that need to upload the uplink reference signal.
  • the corresponding user equipment is: a user equipment that needs to complete a “user discovery, measurement, or channel estimation” behavior by using a reference signal; and for a partial still, it is not required to perform the foregoing “user discovery,
  • the user equipment of the measurement or channel estimation behavior is not included in the scope of the corresponding user equipment described in the embodiments of the present disclosure.
  • the corresponding user equipment may include: a user equipment to discover a site, or a user equipment that is already receiving a site service.
  • the invention is not limited thereto.
  • the uplink reference signal transmission can be cancelled for the user equipment that needs to discover the station; on the other hand, the uplink reference signal transmission can be reduced for the user equipment that is already receiving the site service. Or, all user equipments cancel the uplink reference signal transmission.
  • FIG. 1 is a flowchart of a method for configuring a reference signal according to an embodiment of the present disclosure. As shown in FIG. 1, the method includes:
  • Step 101 The network side determines that the uplink air interface resource is insufficient.
  • the network side may be an eNodeB or the like in an LTE system.
  • Step 102 The network side sends a downlink reference signal to the user equipment, and notifies the corresponding user equipment to perform measurement according to the downlink reference signal, and notifies the corresponding user equipment to cancel or reduce the transmission of the uplink reference signal.
  • the uplink reference signal and the downlink reference signal are used for channel measurement, channel estimation, site discovery, and/or user discovery.
  • the notification method has the following specifications: for example, the specific notification method may trigger the user equipment to change the existing reference signal behavior by broadcasting, multicast, and unicast.
  • a broadcast indicator bit can be designed to tell all user equipments that the current network starts to send downlink reference signals, and the uplink resources are reclaimed.
  • the broadcast method has a problem of timeliness, so it is also possible to pass a multicast or unicast policy.
  • Unicast is mainly suitable for users who are connected or at another service layer, such as a macro station, and the greatest benefit of unicast is that it ensures the timeliness of information transmission.
  • the network side can also switch the downlink reference signal mode to the uplink reference signal mode.
  • the network side determines that the uplink air interface resources are insufficient, including:
  • the network side determines that the uplink reference signal is denser than the preset threshold, or determines that the power headroom of the user equipment is lower than the preset threshold.
  • the method further includes: when the network side determines that the density of the uplink reference signal is lower than a preset threshold, and the power headroom of the user equipment is higher than the preset threshold, notifying the user equipment to send the uplink reference signal.
  • the network side notifies the user equipment to send an uplink reference signal, including:
  • the network side configures the user equipment to send an uplink reference signal, and allocates resources required for transmitting the uplink reference signal.
  • the embodiment of the present disclosure fully utilizes the reciprocity of the uplink and downlink channels.
  • the downlink reference signal is used instead of the uplink reference signal for measurement, and the uplink reference signal is used to improve the pollution state of the downlink reference signal, thereby solving the uplink reference signal for uplink.
  • the resources and the pressure caused by the transmit power of the user equipment can also improve the interference environment of the network, improve the channel measurement quality, and reduce the reference signal transmission overhead.
  • the method for determining the density of the uplink reference signal is any one of the following:
  • the uplink resource may be: an occupied radio block (RB), that is, a basic time-frequency unit of LTE radio transmission.
  • RB occupied radio block
  • the uplink resource and the downlink resource to be configured may be measured by the number of occupied RBs; the uplink and downlink weights are related to uplink and downlink transmission power, and the power is larger, the weight is larger; the uplink and downlink weights are It is also related to the uplink and downlink load ratios. The larger the load is, the larger the weight is.
  • the uplink and downlink weights are also related to the network settings. For example, in order to consider the terminal energy saving, the downlink weight can be increased.
  • the preset threshold of the density of the uplink reference signal may be any one of the following:
  • the number of all available uplink resources in the system is * threshold.
  • the number of uplink resources can be represented by RB, and the threshold can be as 30%.
  • the number of user devices is, for example, 2.
  • Uplink weight Uplink resource to be configured based on the uplink reference signal
  • downlink weight * Downlink resource to be configured based on the downlink reference signal The value is 1.
  • the preset threshold of the density of the uplink reference signal may be set to other values.
  • the determination of the density of the uplink reference signal may be within a macro station range, or within a group of neighboring small base stations, or within a small base station range.
  • the method for determining the power headroom of the user equipment includes:
  • the network side detects the power headroom of each user equipment based on the Power Headroom Report (PHR) reported by each user equipment.
  • PHR Power Headroom Report
  • the method for determining that a power headroom of a user equipment is lower than a preset threshold includes:
  • the power headroom of the user equipment is compared with the preset threshold. If the user equipment in the user equipment has a power headroom lower than the preset threshold, the power headroom of the user equipment is considered to be lower than the preset threshold.
  • the embodiment of the present disclosure further provides a method for configuring a reference signal, the method comprising:
  • the user equipment receives the downlink reference signal sent by the network side when determining that the uplink air interface resource is insufficient. And after receiving the notification sent by the network side, performing measurement according to the downlink reference signal, and canceling or reducing transmission of the uplink reference signal.
  • the uplink air interface resources are insufficient, including:
  • the uplink reference signal is denser than the preset threshold, or the power headroom of the user equipment is lower than the preset threshold.
  • the method for determining the density of the uplink reference signal is any one of the following:
  • the uplink resource may be: a radio block (RB) that is occupied, that is, a basic time-frequency unit of LTE radio transmission.
  • RB radio block
  • the value of the downlink resource to be configured is determined by the value of the downlink resource (the uplink resource to be configured when the uplink reference signal is used for measurement) or the downlink resource to be configured based on the downlink reference signal.
  • the resources and the downlink resources may be measured by the number of occupied RBs; the uplink and downlink weights are related to the uplink and downlink transmission powers, and the greater the power, the greater the weight; the uplink and downlink weights are also related to the uplink and downlink load ratios.
  • the preset threshold of the density of the uplink reference signal may be any one of the following:
  • the number of all available uplink resources in the system is * threshold.
  • the number of uplink resources can be represented by RB, and the threshold can be as 30%.
  • the number of user devices is, for example, 2.
  • Uplink weight Uplink resource to be configured based on the uplink reference signal
  • downlink weight * Downlink resource to be configured based on the downlink reference signal The value is 1.
  • the preset threshold of the density of the uplink reference signal may be set to other values.
  • the determination of the density of the uplink reference signal may be within a macro station range, or within a group of neighboring small base stations, or within a small base station range.
  • the method further includes:
  • the user equipment After receiving the notification sent by the network side, the user equipment sends an uplink reference signal;
  • the notification is sent when the network side determines that the density of the uplink reference signal is lower than a preset threshold and the power headroom of the user equipment is higher than a preset threshold.
  • the embodiment of the present disclosure fully utilizes the reciprocity of the uplink and downlink channels.
  • the downlink reference signal is used instead of the uplink reference signal for channel measurement, and the uplink reference signal is used to improve the pollution state of the downlink reference signal, and the uplink reference signal is solved.
  • the uplink resources and the pressure caused by the transmit power of the user equipment can also improve the interference environment of the network, improve the channel measurement quality, and reduce the reference signal transmission overhead.
  • FIG. 2 is a flowchart of a method for configuring a reference signal according to another embodiment of the present disclosure. As shown in FIG. 2, the method includes:
  • Step 201 The network side collects the density of the uplink reference signal that needs to be sent by the user equipment before sending the reference signal configuration message.
  • the network side may send the reference signal configuration message through a physical downlink control channel (PDCCH) in LTE.
  • the uplink reference signal may be an SRS in LTE.
  • Step 202 The network side determines whether the density of the uplink reference signal is higher than a preset threshold. If yes, step 203 is performed; otherwise, step 204 is performed.
  • Step 203 The network side sends a downlink reference signal to the user equipment, and sends a downlink control message to notify the user equipment to perform channel measurement according to the corresponding downlink reference signal, and notify the user equipment to cancel or reduce the transmission of the uplink reference signal, and then execute Step 207.
  • Step 204 The network side detects the power headroom of the user equipment based on the PHR reported by the user equipment.
  • Step 205 The network side determines whether the power headroom of the user equipment is lower than the preset threshold. If yes, step 203 is performed; otherwise, step 206 is performed.
  • UE power headroom reporting in the physical uplink shared channel (PUSCH) power control of the LTE system which is the difference between the maximum transmit power of the UE and the required transmit power according to the formula, and the value range is -23 ⁇ 40db. It can be understood that when the power headroom (PH) of the user equipment is less than 0 (the preset threshold of the power headroom), the transmission power of the user equipment is insufficient to a certain extent.
  • PUSCH physical uplink shared channel
  • Step 206 The network side sends a downlink control message to notify the user equipment to send an uplink reference signal.
  • Step 207 The configuration flow of the reference signal ends.
  • the embodiment of the present disclosure further provides a configuration device for a reference signal.
  • the device includes: a determining module 301 and a processing module 302;
  • the determining module 301 is configured to trigger the processing module 302 when the uplink air interface resource is insufficient;
  • the processing module 302 is configured to send a downlink reference signal to the user equipment, and notify the user equipment to perform measurement according to the downlink reference signal, and notify the user equipment to cancel or reduce transmission of the uplink reference signal.
  • the determining module determines that the uplink air interface resource is insufficient, and includes:
  • the strength of the uplink reference signal is determined to be higher than a preset threshold, or the power headroom of the user equipment is determined to be lower than a preset threshold.
  • the determining module 301 is further configured to: when the strength of the uplink reference signal is lower than a preset threshold, and the power headroom of the user equipment is higher than a preset threshold, triggering the processing module 302;
  • processing module 302 is further configured to notify the user equipment to send an uplink reference signal.
  • the embodiment of the present disclosure fully utilizes the reciprocity of the uplink and downlink channels.
  • the downlink reference signal is used instead of the uplink reference signal for channel measurement, and the uplink reference signal is used to improve the pollution state of the downlink reference signal, and the uplink reference signal is solved.
  • the uplink resources and the pressure caused by the transmit power of the user equipment can also improve the interference environment of the network, improve the channel measurement quality, and reduce the reference signal transmission overhead.
  • the determining module 301 determines that the density of the uplink reference signal includes any one of the following methods:
  • the upper and lower weights are determined by calculating the value of the uplink resource that needs to be configured when the uplink weight is measured based on the uplink reference signal, or the downlink resource that needs to be configured when the downlink weight is measured based on the downlink reference signal. It is related to uplink and downlink transmission power, or the uplink and downlink weights are related to uplink and downlink load ratios, or the uplink and downlink weights are related to network settings.
  • the preset threshold of the density of the uplink reference signal may be any one of the following:
  • the number of all available uplink resources in the system is * threshold.
  • the number of uplink resources can be represented by RB, and the threshold can be as 30%.
  • the number of user devices is, for example, 2.
  • Uplink weight Uplink resource to be configured based on the uplink reference signal
  • downlink weight * Downlink resource to be configured based on the downlink reference signal The value is 1.
  • the preset threshold of the density of the uplink reference signal may be set to other values.
  • the determining module 301 determines the density of the uplink reference signal, it may be within the macro station range, or within a group of adjacent small base stations, or in a small base station range.
  • UE power headroom reporting in the physical uplink shared channel (PUSCH) power control of the LTE system which is the difference between the maximum transmit power of the UE and the required transmit power according to the formula, and the value range is -23 ⁇ 40dB. It can be understood that when the power headroom (PH) of the user equipment is less than 0 (the preset threshold of the power headroom), the transmission power of the user equipment is insufficient to a certain extent.
  • PUSCH physical uplink shared channel
  • the embodiment of the present disclosure further provides a base station including the configuration apparatus of the reference signal described above, and the base station may be an eNodeB or the like in an LTE system.
  • the embodiment of the present disclosure further provides a user equipment, as shown in FIG. 4, the user equipment includes: a receiving module 41 and a processing module 42;
  • the receiving module 41 is configured to receive a downlink reference signal that is sent by the network side when determining that the uplink air interface resource is insufficient, and trigger the processing module after receiving the notification sent by the network side;
  • the processing module 42 is configured to perform measurement according to the downlink reference signal, and cancel or reduce transmission of the uplink reference signal.
  • the embodiment of the present disclosure fully utilizes the reciprocity of the uplink and downlink channels.
  • the downlink reference signal is used instead of the uplink reference signal for measurement, and the uplink reference signal is used to improve the pollution state of the downlink reference signal, thereby solving the uplink reference signal for uplink.
  • the resources and the pressure caused by the transmit power of the user equipment can also improve the interference environment of the network, improve the measurement quality, and reduce the reference signal transmission overhead.
  • the uplink air interface resources are insufficient, including:
  • the uplink reference signal is denser than the preset threshold, or the power headroom of the user equipment is lower than the preset threshold.
  • the method for determining the density of the uplink reference signal is as follows One:
  • the uplink resource may be: a radio block (RB) that is occupied, that is, a basic time-frequency unit of LTE radio transmission.
  • RB radio block
  • the value of the downlink resource to be configured is determined by the value of the downlink resource (the uplink resource to be configured when the uplink reference signal is used for measurement) or the downlink resource to be configured based on the downlink reference signal.
  • the resources and the downlink resources may be measured by the number of occupied RBs; the uplink and downlink weights are related to the uplink and downlink transmission powers, and the greater the power, the greater the weight; the uplink and downlink weights are also related to the uplink and downlink load ratios.
  • the preset threshold of the density of the uplink reference signal may be any one of the following:
  • the number of all available uplink resources in the system is * threshold.
  • the number of uplink resources can be represented by RB, and the threshold can be as 30%.
  • the number of user devices is, for example, 2.
  • Uplink weight Uplink resource to be configured based on the uplink reference signal
  • downlink weight * Downlink resource to be configured based on the downlink reference signal The value is 1.
  • the preset threshold of the density of the uplink reference signal may be set to other values.
  • the determination of the density of the uplink reference signal may be within a macro station range, or within a group of neighboring small base stations, or within a small base station range.
  • the user equipment further includes: a sending module 43, configured to send an uplink reference signal after the receiving module 41 receives the notification sent by the network side;
  • the notification is sent when the network side determines that the density of the uplink reference signal is lower than a preset threshold and the power headroom of the user equipment is higher than a preset threshold.
  • the embodiments of the present disclosure comprehensively consider the overhead of the uplink reference signal configuration and the power constraint of the user equipment, and flexibly configure the uplink reference signal or the downlink reference signal to implement channel measurement, so as to reduce the reference signal transmission overhead and the impact on the network performance.
  • the uplink reference signal can be sent by the user equipment. Otherwise, if the number of access points (base stations) is smaller than the number of user equipments, the downlink reference signal is sent by the access point for multiple The user equipment performs channel measurement.
  • the technical solutions provided by the embodiments of the present disclosure may also be used for HetNet+UDN+ site discovery.
  • Traditional mechanisms for site discovery by downlink signals can cause storms and interference of reference signals; of course, this can be optimized to reduce the downlink signal density, but at the same time increase the station discovery delay.
  • a scheme based on uplink signal discovery is also proposed in the small cell enhancement. Since the uplink signal should be recognized by multiple stations at the same time, the allocation of the uplink signal is not independently performed by each small station, but may be performed by the macro station.
  • a pool of upstream signal resources to coordinate That is to say, it is more of a virtual cell at the control level, which reduces the reuse of uplink resources and reduces the number of available uplink resources.
  • how the user uplink discovery signal is scheduled can be pre-scheduled by the macro station.
  • the uplink discovery signal allows a certain degree of non-synchronization, and at the same time, the macro user synchronizes through macro-micro synchronization.
  • the embodiments of the present disclosure are applicable not only to conventional reference signals, but also to reference signals having similar functions in future networks. Moreover, the embodiments of the present disclosure are applicable not only to the configuration of the measurement reference signal but also to the configuration of the small base station discovery reference signal.
  • embodiments of the present disclosure may be provided as a method, system, or computer program product. Accordingly, the present disclosure may take the form of a hardware embodiment, a software embodiment, or a combination of software and hardware aspects. Moreover, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本公开文本公开了一种参考信号的配置方法，该方法包括：网络侧确定上行空口资源不足时，向用户设备发送下行参考信号，并通知所述用户设备依据下行参考信号进行测量，且通知用户设备取消或者减少上行参考信号的发送。本公开文本还同时公开了一种实现所述方法的装置和基站。

Description

一种参考信号的配置方法及装置、基站和用户设备
相关申请的交叉参考
本申请主张在2015年1月4日在中国提交的中国专利申请号No.201510004026.8的优先权，其全部内容通过引用包含于此。
技术领域
本公开文本涉及通信领域中的信号测量技术，尤其涉及一种参考信号的配置方法及装置、基站和用户设备。参考信号可以用于网络站点/小区/载波的搜索、发现、选择、重选、接入和切换，以及用户上下行控制和业务信道的估计和质量测量。
背景技术
目前，在网络站点/小区/载波的搜索、发现、选择、重选、接入和切换方面，一方面，用户可以像传统LTE系统基于主要同步信号/辅助同步信号、小区特定参考信号(Cell-specific Reference Signal，CRS)等下行的符号以及参考信号进行小基站的发现，另一方面，小基站可以通过监听用户上行探测参考信号(Sounding Reference Signal，SRS)来实现。3GPP R12Small Cell Enhancement项目有相关讨论。其中指出未来的小基站还可以通过小基站监听用户的上行的SRS实现小基站的发现，以解决未来密集小站引发的大量下行参考信号的广播负担以及干扰问题。
进一步地，考虑小蜂窝对应的小基站和用户之间的关系将更为对等，主要体现在小基站和用户在相关配置，比如：天线、功率等方面更加相近似。在这种情况下，上下行信道互易性将更加充分。除了小基站/小蜂窝的发现、选择、重选以及切换考虑采用上行参考信号替代下行参考信号，上行参考信号和下行参考信号在信道测量方面具有更强的可相互替代性，使用上行测量取代下行测量也具备更大的可行性。
但是，从另一个角度来看，依赖于用户设备发送的上行参考信号对网络的上行资源以及用户的上行发射功率造成挑战。首先地，由于上行信号应该 同时被多个站点能够识别，所以上行信号的分配不是各个小站能够独立进行的，而是可能多个站点共享信号资源池。也就是在上行参考信号控制上更多是一个虚拟小区控制的效果，也就减少了上行资源的复用度，减少了可用的上行资源数目。所以可能引发上行资源的不足。其次，用户本身的功率也是受限的。上行的参考信号测量并不总是高效的。
如何在波动的活跃用户站点数量比例，波动的上下行资源比例时，灵活高效的使用上行或者下行参考信号，进行上下行参考信号的自适应功能配置，实现参考信号的功能，包括“站点/小区/载波的搜索、发现、选择、重选、接入和切换，以及用户上下行控制和业务信道的估计和质量测量”相关功能，是本提案重点要解决的问题。将本提案方法用于“站点/小区/载波的搜索、发现、选择、重选、接入和切换”或者“信道估计”“信道测量”都在本提案的保护范围之内。
将本提案用于跟参考信号有类似信号特征的通信信号，也属于本提案的保护范围。
另外，将本提案用于大规模天线系统，也属于本提案的保护范围。
发明内容
(一)要解决的技术问题
为解决现有存在的技术问题，本公开文本实施例提供一种参考信号的配置方法及装置、基站和用户设备。
(二)技术方案
为了实现上述目的，本公开文本提供如下技术方案：
本公开文本实施例提供了一种参考信号的配置方法，该方法包括：
网络侧确定上行空口资源不足时，向用户设备发送下行参考信号，并通知对应用户设备依据所述下行参考信号进行测量，且通知对应用户设备取消或者减少上行参考信号的发送。
其中，所述网络侧确定上行空口资源不足，包括：
网络侧确定上行参考信号的密集度高于预设门限、或者确定有用户设备的功率余量低于预设门限。
在一个实施例中，该方法还包括：
当网络侧确定上行参考信号的密集度低于预设门限、并且用户设备的功率余量高于预设门限时，通知用户设备发送上行参考信号。
其中，所述网络侧通知用户设备发送上行参考信号，包括：
网络侧配置用户设备发送上行参考信号，且分配发送所述上行参考信号时所需的资源。
其中，所述上行参考信号的密集度的确定方法为以下任一种：
通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
通过统计发送上行参考信号的用户设备的数量来确定；
通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定，其中，所述上、下行权重与上、下行发送功率相关，或者所述上、下行权重与上、下行负载比例相关，或者所述上、下行权重与网络设置相关。
其中，所述用户设备的功率余量的确定方法，包括：
网络侧基于每个用户设备上报的功率余量报告，检测每个用户设备的功率余量。
其中，所述确定上行参考信号的密集度的范围为以下任一种：
在宏站范围内、或在一组相邻小基站范围内、或在一个小基站范围内。
在一个实施例中，所述上行参考信号和所述下行参考信号用于信道测量、信道估计、站点发现和/或用户发现。
在一个实施例中，所述对应用户设备包括：要发现站点的用户设备、或者已经在接受站点服务的用户设备。其中，对于要发现站点的用户设备取消上行参考信号发送，而对于已经在接受站点服务的用户设备减少上行参考信号发送。其中，所有用户设备都取消上行参考信号发送。
在一个实施例中，所述通知对应用户设备包括通过广播、多播、或者单播方式来触发用户设备去改变既有的参考信号行为。
在一个实施例中，当所述上行参考信号和所述下行参考信号用于站点发现时，使用宏站预调度所述上行参考信号。
在一个实施例中，当满足一定条件的时候，网络侧将下行的参考信号方式切换到上行的参考信号方式。
本公开文本实施例还提供了一种参考信号的配置方法，该方法包括：
用户设备接收网络侧在确定上行空口资源不足时发送的下行参考信号，并在收到所述网络侧发送的通知后，依据所述下行参考信号进行测量、且取消或者减少上行参考信号的发送。
其中，所述上行空口资源不足，包括：
上行参考信号的密集度高于预设门限、或者有用户设备的功率余量低于预设门限。
在一个实施例中，该方法还包括：
所述用户设备在收到所述网络侧发出的通知后，发送上行参考信号；
所述通知是当网络侧确定上行参考信号的密集度低于预设门限、并且所有用户设备的功率余量高于预设门限时发出的。
本公开文本实施例还提供了一种参考信号的配置装置，该装置包括：判断模块和处理模块；其中，
所述判断模块，用于确定上行空口资源不足时，触发所述处理模块；
所述处理模块，用于向所有用户设备发送下行参考信号，并通知所述所有用户设备依据所述下行参考信号进行测量，且通知所有用户设备取消或者减少上行参考信号的发送。
其中，所述判断模块确定上行空口资源不足，包括：
确定上行参考信号的密集度高于预设门限、或者确定有用户设备的功率余量低于预设门限。
在一个实施例中，所述判断模块，还用于确定上行参考信号的密集度低于预设门限、且所有用户设备的功率余量高于预设门限时，触发所述处理模块；以及
所述处理模块，还用于通知所有用户设备发送上行参考信号。
其中，所述判断模块确定上行参考信号的密集度包括以下任一种方法：
判断模块通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
判断模块通过统计发送上行参考信号的用户设备的数量来确定；
判断模块通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定，其中，所述上、下行权重与上、下行发送功率相关，或者所述上、下行权重与上、下行负载比例相关，或者所述上、下行权重与网络设置相关。
本公开文本实施例还提供了一种基站，该基站包括上文所述的装置。
本公开文本实施例还提供了一种用户设备，所述用户设备包括：接收模块和处理模块；其中，
所述接收模块，用于接收网络侧在确定上行空口资源不足时发送的下行参考信号，并在收到所述网络侧发送的通知后，触发所述处理模块；
所述处理模块，用于依据所述下行参考信号进行测量、且取消或者减少上行参考信号的发送。
其中，所述上行空口资源不足，包括：
上行参考信号的密集度高于预设门限、或者有用户设备的功率余量低于预设门限。
在一个实施例中，所述用户设备还包括：发送模块，用于在所述接收模块收到所述网络侧发出的通知后，发送上行参考信号；
所述通知是当网络侧确定上行参考信号的密集度低于预设门限、并且所有用户设备的功率余量高于预设门限时发出的。
(三)有益效果
本公开文本实施例至少具有如下有益效果：
本公开文本实施例提供的参考信号的配置方法、装置、基站和用户设备，网络侧确定上行空口资源不足时，向用户设备发送下行参考信号，并通知对应用户设备依据下行参考信号进行测量，且通知对应用户设备取消或者减少上行参考信号的发送。本公开文本实施例充分利用上下行信道的互易性，在满足一定条件时用下行参考信号取代上行参考信号进行测量，利用上行参考信号改善下行参考信号的污染状态，解决了上行参考信号给上行资源以及用户设备发射功率造成的压力，还可改善网络的干扰环境、提升信道测量质量、 降低参考信号传输开销。
附图说明
为了更清楚地说明本公开文本实施例或现有技术中的技术方案，下面将对实施例或现有技术描述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公开文本的一些实施例，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。在附图(其不一定是按比例绘制的)中，相似的附图标记可在不同的视图中描述相似的部件。具有不同字母后缀的相似附图标记可表示相似部件的不同示例。附图以示例而非限制的方式大体示出了本文中所讨论的各个实施例。
图1为本公开文本实施例所述参考信号的配置方法实现流程图；
图2为本公开文本另一实施例所述参考信号的配置方法实现流程图；
图3为本公开文本实施例所述参考信号的配置装置结构示意图；以及
图4为本公开文本实施例所述用户设备的结构示意图。
具体实施方式
下面结合附图和实施例，对本公开文本的具体实施方式做进一步描述。以下实施例仅用于说明本公开文本，但不用来限制本公开文本的范围。
为使本公开文本实施例的目的、技术方案和优点更加清楚，下面将结合本公开文本实施例的附图，对本公开文本实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本公开文本的一部分实施例，而不是全部的实施例。基于所描述的本公开文本的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开文本保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开文本所属领域内具有一般技能的人士所理解的通常意义。本公开文本专利申请说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不表示数量限制，而是表示存在至少一个。“连接”或 者“相连”等类似的词语并非限定于物理的或者机械的连接，而是可以包括电性的连接，不管是直接的还是间接的。“上”、“下”、“左”、“右”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也相应地改变。
以下结合附图对本公开文本实施例的原理和特征进行描述，所举实例只用于解释本公开文本实施例，并非用于限定本公开文本实施例的范围。
本公开文本的实施例中，网络侧确定上行空口资源不足时，向用户设备发送下行参考信号，并通知对应用户设备依据下行参考信号进行测量，且通知对应用户设备取消或者减少上行参考信号的发送。
其中，所述上行参考信号的密集度为：基于上行参考信号进行测量时所需要配置的上行参考信号的密集度；所述对应用户设备为：需要上传所述上行参考信号的所有用户设备。
本公开文本实施例中，所述的对应用户设备为：需要通过参考信号完成“用户的发现、测量或者信道估计”行为的用户设备；而对于部分静止的，不需要执行上述“用户的发现、测量或者信道估计”行为的用户设备，不包括在本公开文本实施例所述的对应用户设备范围内。具体的，所述对应用户设备可包括：要发现站点的用户设备、或者已经在接受站点服务的用户设备。然而，本发明并不以此为限制条件。
相应的，一方面，对于要发现站点的用户设备可以取消上行参考信号发送；另一方面，对于已经在接受站点服务的用户设备可以减少上行参考信号发送。或者，所有用户设备都取消上行参考信号发送。
下面结合附图及具体实施例对本公开文本作进一步详细说明。
图1为本公开文本实施例所述参考信号的配置方法实现流程图，如图1所示，该方法包括：
步骤101：网络侧确定上行空口资源不足。
本公开文本实施例中，所述网络侧可为LTE系统中的eNodeB等。
步骤102：网络侧向用户设备发送下行参考信号，并通知对应用户设备依据下行参考信号进行测量，且通知对应用户设备取消或者减少上行参考信号的发送。
这里，所述上行参考信号和所述下行参考信号用于信道测量、信道估计、站点发现和/或用户发现。
这里，关于通知方法有如下规范：例如，具体通知方法可以通过广播、多播、单播方式来触发用户设备去改变既有的参考信号行为。例如，广播方式中可以设计一个广播指示位，用于告诉所有用户设备当前网络开始发送下行参考信号，上行资源被收回。但是，广播方式具有时效性的问题，因此也可以通过组播或者单播策略。单播主要适用于已连接用户或者在另一个服务层，比如宏站被服务的用户，并且单播的最大好处是，能够保证信息传达的及时性。
另外，当满足一定条件的时候，网络侧还可以将下行的参考信号方式切换到上行的参考信号方式。
其中，所述网络侧确定上行空口资源不足，包括：
网络侧确定上行参考信号的密集度高于预设门限、或者确定有用户设备的功率余量低于预设门限。
在一个实施例中，该方法还包括：网络侧确定上行参考信号的密集度低于预设门限、并且用户设备的功率余量高于预设门限时，通知用户设备发送上行参考信号。
这里，所述网络侧通知用户设备发送上行参考信号，包括：
当网络侧配置用户设备发送上行参考信号，且分配发送所述上行参考信号时所需的资源。
本公开文本实施例充分利用上下行信道的互易性，在满足一定条件时用下行参考信号取代上行参考信号进行测量，利用上行参考信号改善下行参考信号的污染状态，解决了上行参考信号给上行资源以及用户设备发射功率造成的压力，还可改善网络的干扰环境、提升信道测量质量、降低参考信号传输开销。
本公开文本实施例中，所述上行参考信号的密集度的确定方法为以下任一种：
通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
其中，所述上行资源可以是：占用的无线传输块(radio block，RB)，即：LTE无线传输的基本时频单元。
通过统计发送上行参考信号的用户设备的数量来确定；
通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定。其中，所述需要配置的上行资源和下行资源可以通过占用的RB的数量来衡量；所述上、下行权重与上、下行发送功率相关，功率越大，权重越大；所述上、下行权重还与上、下行负载比例相关，负载越大，权重越大；另外，所述上、下行权重还与网络设置相关，比如：为了考虑终端节能，可以把下行权重调大。
相应的，所述上行参考信号的密集度的预设门限可以为下述任一种：
系统中全部可用的上行资源的数量*阈值，所述上行资源的数量可用RB表征，阈值可如30％。
用户设备的数量比如是2。
(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)取值为1。
当然，所述上行参考信号的密集度的预设门限可以设置为其它值。
在本公开文本实施例中，所述上行参考信号的密集度的确定可以在宏站范围内、或在一组相邻小基站范围内、或在一个小基站范围。
在本公开文本实施例中，所述用户设备的功率余量的确定方法包括：
网络侧基于每个用户设备上报的功率余量报告(Power Headroom Report，PHR)检测每个用户设备的功率余量。
在本公开文本实施例中，所述确定有用户设备的功率余量低于预设门限的方法包括：
分别将用户设备的功率余量与预设门限进行比较，如果用户设备中存在功率余量低于预设门限的用户设备，则认为有用户设备的功率余量低于预设门限。
本公开文本实施例还提供了一种参考信号的配置方法，该方法包括：
用户设备接收网络侧在确定上行空口资源不足时发送的下行参考信号， 并在收到所述网络侧发送的通知后，依据所述下行参考信号进行测量、且取消或者减少上行参考信号的发送。
其中，所述上行空口资源不足，包括：
上行参考信号的密集度高于预设门限、或者有用户设备的功率余量低于预设门限。
本公开文本实施例中，所述上行参考信号的密集度的确定方法为以下任一种：
通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
其中，所述上行资源，可为：占用的无线传输块(radio block，RB)，即：LTE无线传输的基本时频单元。
通过统计发送上行参考信号的用户设备的数量来确定；
通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定；其中，所述需要配置的上行资源和下行资源可以通过占用的RB的数量来衡量；所述上、下行权重与上、下行发送功率相关，功率越大，权重越大；所述上、下行权重还与上、下行负载比例相关，负载越大，权重越大；另外，所述上、下行权重还与网络设置相关，比如：为了考虑终端节能，可以把下行权重调大。
相应的，所述上行参考信号的密集度的预设门限可以为下述任一种：
系统中全部可用的上行资源的数量*阈值，所述上行资源的数量可用RB表征，阈值可如30％。
用户设备的数量比如是2。
(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)取值为1。
当然，所述上行参考信号的密集度的预设门限可以设置为其它值。
在本公开文本实施例中，所述上行参考信号的密集度的确定可以在宏站范围内、或在一组相邻小基站范围内、或在一个小基站范围。
在一个实施例中，该方法还包括：
所述用户设备在收到所述网络侧发出的通知后，发送上行参考信号；
所述通知是当网络侧确定上行参考信号的密集度低于预设门限、并且用户设备的功率余量高于预设门限时发出的。
本公开文本实施例充分利用上下行信道的互易性，在满足一定条件时用下行参考信号取代上行参考信号进行信道测量，利用上行参考信号改善下行参考信号的污染状态，解决了上行参考信号给上行资源以及用户设备发射功率造成的压力，还可改善网络的干扰环境、提升信道测量质量、降低参考信号传输开销。
图2为本公开文本另一实施例所述参考信号的配置方法实现流程图，如图2所示，该方法包括：
步骤201：网络侧在发送参考信号配置消息之前，统计需要用户设备发送的上行参考信号的密集度。
这里，所述网络侧可以通过LTE中的物理下行控制信道(PDCCH)发送所述参考信号配置消息。所述上行参考信号可为LTE中的SRS。
步骤202：网络侧判断所述上行参考信号的密集度是否高于预设门限，如果是，则执行步骤203；否则，执行步骤204。
步骤203：网络侧向所述用户设备发送下行参考信号，并通过发送下行控制消息通知用户设备依据对应的下行参考信号进行信道的测量，同时通知用户设备取消或者减少上行参考信号的发送，之后执行步骤207。
步骤204：网络侧基于用户设备上报的PHR检测用户设备的功率余量。
步骤205：网络侧判断是否有用户设备的功率余量低于预设门限，如果是，则执行步骤203；否则，执行步骤206。
需要说明的是，LTE系统物理上行共享信道(PUSCH)功率控制中有一个UE功率余量上报，是UE最大发射功率与根据公式计算需要的发射功率的差值，其取值范围为-23～40db。可以理解，当用户设备的功率余量(PH)＜0(功率余量的预设门限)时，在一定程度就说明用户设备的发射功率不足。
步骤206：网络侧通过发送下行控制消息通知用户设备发送上行参考信号。
步骤207：参考信号的配置流程结束。
本公开文本实施例还提供了一种参考信号的配置装置，如图3所示，该装置包括：判断模块301和处理模块302；其中，
所述判断模块301，用于确定上行空口资源不足时，触发所述处理模块302；
所述处理模块302，用于向用户设备发送下行参考信号，并通知所述用户设备依据所述下行参考信号进行测量，且通知用户设备取消或者减少上行参考信号的发送。
在本公开文本实施例中，所述判断模块确定上行空口资源不足，包括：
确定上行参考信号的密集度高于预设门限、或者确定有用户设备的功率余量低于预设门限。
在本公开文本一个实施例中，所述判断模块301，还用于确定上行参考信号的密集度低于预设门限、且用户设备的功率余量高于预设门限时，触发所述处理模块302；
相应的，所述处理模块302，还用于通知用户设备发送上行参考信号。
本公开文本实施例充分利用上下行信道的互易性，在满足一定条件时用下行参考信号取代上行参考信号进行信道测量，利用上行参考信号改善下行参考信号的污染状态，解决了上行参考信号给上行资源以及用户设备发射功率造成的压力，还可改善网络的干扰环境、提升信道测量质量、降低参考信号传输开销。
本公开文本实施例中，所述判断模块301确定上行参考信号的密集度包括以下任一种方法：
通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
通过统计发送上行参考信号的用户设备的数量来确定；
通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定，其中，所述上、下行权重与上、下行发送功率相关，或者所述上、下行权重与上、下行负载比例相关，或者所述上、下行权重与网络设置相关。
相应的，所述上行参考信号的密集度的预设门限可以为下述任一种：
系统中全部可用的上行资源的数量*阈值，所述上行资源的数量可用RB表征，阈值可如30％。
用户设备的数量比如是2。
(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)取值为1。
当然，所述上行参考信号的密集度的预设门限可以设置为其它值。
在本公开文本实施例中，所述判断模块301确定上行参考信号的密集度时，可以在宏站范围内、或在一组相邻小基站范围内、或在一个小基站范围。
需要说明的是，LTE系统物理上行共享信道(PUSCH)功率控制中有一个UE功率余量上报，是UE最大发射功率与根据公式计算需要的发射功率的差值，其取值范围为-23～40dB。可以理解，当用户设备的功率余量(PH)＜0(功率余量的预设门限)时，在一定程度就说明用户设备的发射功率不足。
本公开文本实施例还提供了一种基站，该基站包括上文所述的参考信号的配置装置，所述基站可为LTE系统中的eNodeB等。
本公开文本实施例还提供了一种用户设备，如图4所示，所述用户设备包括：接收模块41和处理模块42；其中，
所述接收模块41，用于接收网络侧在确定上行空口资源不足时发送的下行参考信号，并在收到所述网络侧发送的通知后，触发所述处理模块；
所述处理模块42，用于依据所述下行参考信号进行测量、且取消或者减少上行参考信号的发送。
本公开文本实施例充分利用上下行信道的互易性，在满足一定条件时用下行参考信号取代上行参考信号进行测量，利用上行参考信号改善下行参考信号的污染状态，解决了上行参考信号给上行资源以及用户设备发射功率造成的压力，还可改善网络的干扰环境、提升测量质量、降低参考信号传输开销。
其中，所述上行空口资源不足，包括：
上行参考信号的密集度高于预设门限、或者有用户设备的功率余量低于预设门限。
本公开文本实施例中，所述上行参考信号的密集度的确定方法为以下任 一种：
通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
其中，所述上行资源，可为：占用的无线传输块(radio block，RB)，即：LTE无线传输的基本时频单元。
通过统计发送上行参考信号的用户设备的数量来确定；
通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定；其中，所述需要配置的上行资源和下行资源可以通过占用的RB的数量来衡量；所述上、下行权重与上、下行发送功率相关，功率越大，权重越大；所述上、下行权重还与上、下行负载比例相关，负载越大，权重越大；另外，所述上、下行权重还与网络设置相关，比如：为了考虑终端节能，可以把下行权重调大。
相应的，所述上行参考信号的密集度的预设门限可以为下述任一种：
系统中全部可用的上行资源的数量*阈值，所述上行资源的数量可用RB表征，阈值可如30％。
用户设备的数量比如是2。
(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)取值为1。
当然，所述上行参考信号的密集度的预设门限可以设置为其它值。
在本公开文本实施例中，所述上行参考信号的密集度的确定可以在宏站范围内、或在一组相邻小基站范围内、或在一个小基站范围。
在一个实施例中，所述用户设备还包括：发送模块43，用于在所述接收模块41收到所述网络侧发出的通知后，发送上行参考信号；
所述通知是当网络侧确定上行参考信号的密集度低于预设门限、并且用户设备的功率余量高于预设门限时发出的。
本公开文本实施例综合考虑上行参考信号配置的开销和用户设备的功率制约，灵活配置上行参考信号或者下行参考信号实现信道的测量，以降低参考信号传输开销以及对网络性能的影响。在实际应用时，例如：当接入点(基 站)数量同用户设备数量类同，可以由用户设备发送上行参考信号；否则，像传统网络，接入点(基站)数量小于用户设备数量，则由接入点发送下行参考信号，供多个用户设备进行信道的测量。
此外，本公开文本实施例提供的技术方案还可用于HetNet+UDN+站点发现。传统由下行信号进行站点发现的机制，会导致参考信号的风暴、干扰；当然，这个是可以优化的，可以减少下行信号密度，但是同时也增大了站点发现时延。另外，在small cell enhancement中也提出了基于上行信号发现的方案，由于上行信号应该同时被多个站点能够识别，所以上行信号的分配不是各个小站能够独立进行的，而是可能由宏站来协调的一个上行信号资源池。也就是在控制(control)层面上更多是一个虚拟小区(virtual cell)的效果，也就减少了上行资源的复用度，减少了可用的上行资源数目。所以可能引发上行资源的不足。这里，用户上行发现信号如何调度，可用由宏站预调度。对于用户上行发现信号不同步，上行发现信号允许一定的不同步，同时通过宏微同步，使得宏用户同步。
另一方面，用户设备本身的功率也是受限的。上行的参考信号测量并不总是高效的。
综上，为了充分利用上下行参考信号红利，在用户站点比较波动，上下行资源占用波动时，能够有一个机制来实现上下行发现参考信号的自适应切换。
此外，本公开文本实施例不仅适用传统的参考信号，更适用于未来网络中具有类似功能的参考信号。而且，本公开文本实施例不仅适用于测量参考信号的配置，也可以适用于小基站发现参考信号的配置。
本领域内的技术人员应明白，本公开文本的实施例可提供为方法、系统、或计算机程序产品。因此，本公开文本可采用硬件实施例、软件实施例、或结合软件和硬件方面的实施例的形式。而且，本公开文本可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器和光学存储器等)上实施的计算机程序产品的形式。
本公开文本是参照根据本公开文本实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现 流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
以上所述，仅为本公开文本的较佳实施例而已，并非用于限定本公开文本的保护范围。

Claims (28)

  1. 一种参考信号的配置方法，包括：
    网络侧确定上行空口资源不足时，向用户设备发送下行参考信号，并通知对应用户设备依据所述下行参考信号进行测量，且通知对应用户设备取消或者减少上行参考信号的发送。
  2. 根据权利要求1所述的方法，其中，所述网络侧确定上行空口资源不足，包括：
    网络侧确定上行参考信号的密集度高于预设门限、或者确定有用户设备的功率余量低于预设门限。
  3. 根据权利要求2所述的方法，还包括：
    当网络侧确定上行参考信号的密集度低于预设门限、并且用户设备的功率余量高于预设门限时，通知用户设备发送上行参考信号。
  4. 根据权利要求3所述的方法，其中，所述网络侧通知用户设备发送上行参考信号，包括：
    网络侧配置用户设备发送上行参考信号，且分配发送所述上行参考信号时所需的资源。
  5. 根据权利要求2或3所述的方法，其中，所述上行参考信号的密集度的确定方法为以下任一种：
    通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
    通过统计发送上行参考信号的用户设备的数量来确定；
    通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定，其中，所述上、下行权重与上、下行发送功率相关，或者所述上、下行权重与上、下行负载比例相关，或者所述上、下行权重与网络设置相关。
  6. 根据权利要求2或3所述的方法，其中，所述用户设备的功率余量的确定方法，包括：
    网络侧基于每个用户设备上报的功率余量报告，检测每个用户设备的功 率余量。
  7. 根据权利要求2或3所述的方法，其中，所述确定上行参考信号的密集度的范围为以下任一种：
    在宏站范围内、或在一组相邻小基站范围内、或在一个小基站范围内。
  8. 根据权利要求1所述的方法，其中，所述上行参考信号和所述下行参考信号用于信道测量、信道估计、站点发现和/或用户发现。
  9. 根据权利要求1所述的方法，其中，所述对应用户设备包括：要发现站点的用户设备、或者已经在接受站点服务的用户设备。
  10. 根据权利要求9所述的方法，其中，对于要发现站点的用户设备取消上行参考信号发送，而对于已经在接受站点服务的用户设备减少上行参考信号发送。
  11. 根据权利要求9所述的方法，其中，所有用户设备都取消上行参考信号发送。
  12. 根据权利要求1所述的方法，其中，所述通知对应用户设备包括通过广播、多播、或者单播方式来触发用户设备去改变既有的参考信号行为。
  13. 根据权利要求1所述的方法，其中，当所述上行参考信号和所述下行参考信号用于站点发现时，使用宏站预调度所述上行参考信号。
  14. 根据权利要求1所述的方法，其中，当满足一定条件的时候，网络侧将下行的参考信号方式切换到上行的参考信号方式。
  15. 一种参考信号的配置方法，包括：
    用户设备接收网络侧在确定上行空口资源不足时发送的下行参考信号，并在收到所述网络侧发送的通知后，依据所述下行参考信号进行测量、且取消或者减少上行参考信号的发送。
  16. 根据权利要求15所述的方法，其中，所述上行空口资源不足，包括：
    上行参考信号的密集度高于预设门限、或者有用户设备的功率余量低于预设门限。
  17. 根据权利要求16所述的方法，还包括：
    所述用户设备在收到所述网络侧发出的通知后，发送上行参考信号；
    所述通知是当网络侧确定上行参考信号的密集度低于预设门限、并且用 户设备的功率余量高于预设门限时发出的。
  18. 根据权利要求15所述的方法，其中，所述上行参考信号和所述下行参考信号用于信道测量、信道估计、站点发现和/或用户发现。
  19. 根据权利要求15所述的方法，其中，所述用户设备包括：要发现站点的用户设备、或者已经在接受站点服务的用户设备。
  20. 根据权利要求19所述的方法，其中，对于要发现站点的用户设备取消上行参考信号发送，而对于已经在接受站点服务的用户设备减少上行参考信号发送。
  21. 一种参考信号的配置装置，包括：判断模块和处理模块；其中，
    所述判断模块，用于确定上行空口资源不足时，触发所述处理模块；
    所述处理模块，用于向用户设备发送下行参考信号，并通知对应用户设备依据所述下行参考信号进行测量，且通知对应用户设备取消或者减少上行参考信号的发送。
  22. 根据权利要求21所述的装置，其中，所述判断模块确定上行空口资源不足，包括：
    确定上行参考信号的密集度高于预设门限、或者确定有用户设备的功率余量低于预设门限。
  23. 根据权利要求22所述的装置，其中，所述判断模块，还用于确定上行参考信号的密集度低于预设门限、且用户设备的功率余量高于预设门限时，触发所述处理模块；以及
    所述处理模块，还用于通知用户设备发送上行参考信号。
  24. 根据权利要求22或23所述的装置，其中，所述判断模块确定上行参考信号的密集度包括以下任一种方法：
    判断模块通过统计基于上行参考信号进行测量时需要配置的上行资源的数量来确定；
    判断模块通过统计发送上行参考信号的用户设备的数量来确定；
    判断模块通过计算(上行权重*基于上行参考信号进行测量时需要配置的上行资源)/(下行权重*基于下行参考信号进行测量时需要配置的下行资源)的值来确定，其中，所述上、下行权重与上、下行发送功率相关，或者所述 上、下行权重与上、下行负载比例相关，或者所述上、下行权重与网络设置相关。
  25. 一种基站，包括权利要求21-24中任一项所述的装置。
  26. 一种用户设备，包括：接收模块和处理模块；其中，
    所述接收模块，用于接收网络侧在确定上行空口资源不足时发送的下行参考信号，并在收到所述网络侧发送的通知后，触发所述处理模块；
    所述处理模块，用于依据所述下行参考信号进行测量、且取消或者减少上行参考信号的发送。
  27. 根据权利要求26所述的用户设备，其中，所述上行空口资源不足，包括：
    上行参考信号的密集度高于预设门限、或者有用户设备的功率余量低于预设门限。
  28. 根据权利要求27所述的用户设备，其中，所述用户设备还包括：发送模块，用于在所述接收模块收到所述网络侧发出的通知后，发送上行参考信号；
    所述通知是当网络侧确定上行参考信号的密集度低于预设门限、并且用户设备的功率余量高于预设门限时发出的。
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