WO2012040912A1 - 一种载波测量方法和系统 - Google Patents

一种载波测量方法和系统 Download PDF

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Publication number
WO2012040912A1
WO2012040912A1 PCT/CN2010/077422 CN2010077422W WO2012040912A1 WO 2012040912 A1 WO2012040912 A1 WO 2012040912A1 CN 2010077422 W CN2010077422 W CN 2010077422W WO 2012040912 A1 WO2012040912 A1 WO 2012040912A1
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Prior art keywords
measurement
carrier
requirement
frequency
component carrier
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PCT/CN2010/077422
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English (en)
French (fr)
Inventor
张健
陈中明
黄亚达
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中兴通讯股份有限公司
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Priority to PCT/CN2010/077422 priority Critical patent/WO2012040912A1/zh
Publication of WO2012040912A1 publication Critical patent/WO2012040912A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements

Definitions

  • the present invention relates to carrier measurement techniques in the LTE-A (Long-Term Evolution Advanced) system, and more particularly to a carrier measurement method and system. Background technique
  • LTE-A system version 10 (Rel-10) carrier aggregation (CA, Carrier Aggregation) supports up to five component carriers (CC, Component Carriers) in the downlink and/or uplink to support a maximum transmission bandwidth of 100 MHz, respectively.
  • the total number of CC configurations is less than or equal to the total configuration of DL CCs.
  • the terminal configures one downlink primary carrier (DL PCC, Downlink Primary CC) and one uplink primary carrier (UL PCC, Uplink Primary CC), and can configure 0 ⁇ 4 downlink secondary carriers (DL SCC, Downlink Secondary).
  • CC downlink secondary carriers
  • UE SCC, Uplink Secondary CC uplink secondary CCs
  • UE initial access or handover access cell is called primary cell (PCell, Primary Cell), by DL PCC and
  • the UL PCC component, DL PCC and UL PCC are associated by the information indicated in System Information Broadcast 2 (SIB2).
  • SIB2 System Information Broadcast 2
  • the eNB Due to the increase in UE traffic or the base station (eNB) based Radio Resource Management (RRM) requirements, the eNB A new cell configuration may be added to the UE by using RRC (Radio Resource Control) signaling, and the newly added cell is called a secondary cell (SCell, Secondary Cell), and is composed of a DL SCC and a UL SCC associated with the SIB2, or Include only DL SCC.
  • the eNB may delete by RRC signaling because the UE traffic is reduced, or the cell signal quality currently configured for the UE is degraded, or based on the RRM management of the eNB.
  • the configuration information of the uplink and downlink carriers of the deleted cell is specifically included in the cell that has been configured to the UE. The above process of adding and deleting cell configurations can occur at the same time.
  • the eNB can activate/deactivate a certain DL SCC through a Medium Access Control Control Element (MAC CE), and the DL PCC cannot be activated/deactivated.
  • the UE does not monitor the Physical Downlink Control Channel (PDCCH) on the DL SCC in the deactivated state, does not receive the Physical Downlink Shared Channel (PDSCH), and does not perform channel quality indicator (CQI, Channel Quality Indicator).
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • CQI Channel Quality Indicator
  • UL SCC can simultaneously activate/deactivate or independently activate/deactivate with its associated DL SCC.
  • the UE does not send data on its Physical Uplink Shared Channel (PUSCH), and does not send Up Reference Signals (SRS).
  • PUSCH Physical Uplink Shared Channel
  • SRS Up Reference Signals
  • FIG. 1 is a schematic diagram of carrier aggregation in the prior art.
  • Each component carrier performing carrier aggregation may be continuous or discontinuous in the frequency domain.
  • the radio structure of the UE needs to meet the corresponding requirements. For example, in the frequency division duplex mode (FDD, Frequency Division Duplex), the UE supports downlink carrier aggregation. If two or more frequency carriers are not consecutive, the UE needs to have two or more radio receiving devices.
  • FDD Frequency Division Duplex
  • Rx, Receiver can receive data on multiple discontinuous component carriers at the same time; if receiving two or more frequency domain consecutive component carriers, compared to a radio receiver with a maximum bandwidth of 20 MHz in a single carrier system, The UE needs to have a radio receiving device with a maximum bandwidth exceeding 20 MHz to receive data on multiple consecutive component carriers at the same time, or if the UE has multiple radio receiving devices, the UE can use the multiple radio receiving devices simultaneously in the multiple consecutive Receive data on a component carrier. Similarly, the UE supports uplink for FDD. Carrier aggregation, if the UE transmits data on two or more discontinuous component carriers at the same time,
  • the UE needs to have two or more radio transmitting devices (Tx, Transmitter); if the UE transmits data on two or more consecutive component carriers at the same time, the UE needs to have a radio transmitting device with a maximum bandwidth exceeding 20 MHz, or Two or more radio transmitting devices.
  • TDD Time Division Duplex
  • the UE supports the carrier aggregation principle as in the above FDD.
  • the above Receiver and Transmitter may be attributed to the same device when implemented on the UE, that is, a unified transceiver (transceiver), or radio frequency unit.
  • the frequency within the system is divided into two measurement requirements, namely, intra-frequency measurement requirements and inter-frequency measurement requirements.
  • Measurement requirements include: identification time of the cell, measurement time of the cell, measurement accuracy, and the like.
  • the measurement is mainly used to support the handover decision. The occurrence of the same-frequency handover is more frequent than the inter-frequency handover.
  • the inter-frequency measurement requires the UE to adjust the radio unit.
  • the measurement GAP needs to be configured.
  • the frequency of the measurement is more complicated, so the measurement requirements of the same frequency are higher than the requirements of the inter-frequency measurement.
  • the measurement period of the intra-frequency cell in LTE is 200 ms; the measurement period of the inter-frequency cell and the configuration of the measurement GAP and the frequency to be measured (including all inter-frequency and iso-system frequencies measured using GAP) The number is related.
  • the measurement period is 480N fre q .
  • the measurement period is 240N freq , and N freq is the number of frequencies.
  • DRX discontinuous reception
  • Discontinuous Reception the requirements for co-frequency and inter-frequency measurement are further relaxed with the DRX cycle in consideration of power saving requirements.
  • the same frequency measurement period is the same as the unconfigured DRX same frequency measurement period, which is 200ms.
  • the same frequency measurement period is 5s.
  • the inter-frequency measurement period is related to the GAP pattern.
  • the measurement period is the same as the unconfigured DRX same-frequency measurement period; when the DRX period is 256ms, the measurement period is 5.12N freq ; when the DRX period is 320ms, the measurement is performed.
  • the period is 6.4N freq .
  • the UE of the LTE-A may have three types of component carriers in the connected state (RRC_CON ECTED ): a component carrier configured and activated, a component carrier configured and deactivated, and an unconfigured component carrier.
  • RRC_CON ECTED the same frequency measurement requirement of LTE is used; for the unconfigured component carrier, the inter-frequency measurement requirement is used.
  • the component carrier that is configured and deactivated which measurement requirement is used is not yet determined.
  • the component carrier can be quickly activated according to the change of the service; therefore, if the measurement demand is relaxed, for example, according to the inter-frequency measurement requirement, the measurement will result in The reflection of the deactivated component carrier radio quality variation becomes slower; and if the deactivated component carrier and the activated component carrier use the same measurement requirement, the UE will be compared to consume power.
  • the main object of the present invention is to provide a carrier measurement method and system for realizing measurement of a component carrier that is configured and deactivated, and achieving both measurement accuracy and power saving.
  • the invention provides a carrier measurement method, the method comprising:
  • the base station (eNB) sends measurement control signaling to the terminal (UE), instructing the UE to measure the configured and deactivated component carrier according to the specified measurement requirement;
  • the UE receives the measurement control instruction, performs measurement on the configured and deactivated component carrier according to the specified measurement requirement according to the indication in the measurement control instruction, and reports the measurement result to the eNB.
  • the specified measurement requirements include: low measurement requirements and high measurement requirements;
  • the UE When the UE performs measurement according to low measurement requirements, it needs to tune the frequency of its own radio frequency unit to the frequency of the component to be measured and deactivated;
  • the frequency point is to the frequency band containing the activated component carrier and the frequency band of the configured and deactivated component carrier.
  • the method further includes: the terminal measuring the configured and deactivated component carrier according to a default measurement requirement before receiving the measurement control signaling; the default measurement requirement is a low measurement requirement or a high measurement requirement.
  • the measurement control command is a Radio Resource Control (RRC) signaling or a Medium Access Control Layer Control Element (MAC CE).
  • RRC Radio Resource Control
  • MAC CE Medium Access Control Layer Control Element
  • the measurement control instruction includes at least one of the following information: frequency point information of the component carrier to be measured, carrier index information, and an identification (ID) of the measurement object.
  • the base station sends the measurement control signaling according to a scheduling policy, where the scheduling decision is: determining whether to activate the configured and deactivated component carrier according to a change in a UE traffic, a change in a primary cell load, or a change in a wireless condition.
  • the UE traffic is the downlink traffic, or the uplink traffic determined by the eNB according to the buffer status report (BSR) reported by the UE.
  • BSR buffer status report
  • the wireless condition change is: a change in a wireless condition of a primary cell, or a change in a wireless condition of the component carrier that is configured and deactivated, or a change in a wireless condition of an activated component carrier that is co-frequency with the configured and deactivated component carrier .
  • the measurement requirements include the following parameters: measurement capability requirements of the UE, number of frequency measurements and time requirements, number of cell detections and time requirements, number of cell measurements, and time requirements.
  • the present invention also provides a carrier measurement system, the system includes: an eNB and a UE, where the eNB is configured to send measurement control signaling to the UE, indicating that the UE is configured and deactivated according to a specified measurement requirement.
  • Component carrier to measure
  • the UE is configured to receive the measurement control instruction, perform measurement on the configured and deactivated component carrier according to the specified measurement requirement according to the indication in the measurement control instruction, and report the measurement result to the eNB.
  • the specified measurement requirements include: low measurement requirements and high measurement requirements;
  • the UE When the UE performs measurement according to low measurement requirements, it needs to tune the frequency of its own radio frequency unit to the frequency of the component to be measured and deactivated;
  • the UE When the UE performs measurements in accordance with high measurement requirements, it needs to tune the frequency of its own radio frequency unit to the frequency band containing the activated component carrier and the frequency band of the configured and deactivated component carrier.
  • the terminal is further configured to: before receiving the measurement control signaling, perform measurement on the configured and deactivated component carrier according to a default measurement requirement; the default measurement requirement is a low measurement requirement or a high measurement requirement.
  • the measurement control instruction is RRC signaling or MAC CE.
  • the measurement control instruction includes at least one of the following information: frequency point information of the component carrier to be measured, carrier index information, and ID of the measurement object.
  • the base station is further configured to: send the measurement control signaling according to a scheduling policy, where the scheduling decision is: determining whether the configuration needs to be activated and deactivated according to a change in a UE traffic volume, a change in a primary cell load, or a change in a wireless condition.
  • a scheduling policy where the scheduling decision is: determining whether the configuration needs to be activated and deactivated according to a change in a UE traffic volume, a change in a primary cell load, or a change in a wireless condition.
  • the UE traffic is the downlink traffic, or the uplink traffic determined by the eNB according to the BSR reported by the UE.
  • the wireless condition change is: a change in a wireless condition of a primary cell, or a change in a wireless condition of the component carrier that is configured and deactivated, or a change in a wireless condition of an activated component carrier that is co-frequency with the configured and deactivated component carrier .
  • the measurement requirements include the following parameters: measurement capability requirements of the UE, number of frequency measurements and time requirements, number of cell detections and time requirements, number of cell measurements, and time requirements.
  • the eNB sends measurement control signaling to the UE according to the scheduling policy, and instructs the UE to perform measurement on the configured and deactivated component carrier according to the specified measurement requirement; the UE receives the measurement control Command, according to the instructions in the measurement control command, press
  • the configured and deactivated component carriers are measured according to the specified measurement requirements, and the measurement results are reported to the eNB.
  • the measurement of the component carrier configured and deactivated is realized, and the accuracy and power saving effect of measuring the deactivated component carrier are taken into consideration.
  • FIG. 1 is a schematic diagram of carrier aggregation in the prior art
  • FIG. 2 is a flow chart of a carrier measurement method according to the present invention. detailed description
  • the carrier measurement method provided by the present invention is intended to be configured by the UE according to the indication of the measurement control signaling, in order to achieve measurement of the component carrier that is configured and deactivated by the UE to achieve measurement accuracy and power saving.
  • Deactivating the component carrier to perform measurement the measurement control signaling instructing the UE to perform measurement on the configured and deactivated component carrier according to a specified measurement requirement (high measurement requirement or low measurement requirement); the measurement control signaling may be Radio resource control (RRC) signaling or MAC CE; the measurement control signaling includes at least one of the following information: frequency point information of the component carrier to be measured, carrier index information, and identifier of the measurement object (ID).
  • RRC Radio resource control
  • the UE performs measurement according to the default measurement requirement without receiving the measurement control signaling, and the default measurement requirement may be according to a low measurement requirement or a high measurement requirement.
  • the UE When the UE performs measurement according to low measurement requirements, it needs to tune the frequency of its own radio frequency unit to the frequency of the required measurement configuration and deactivated component carrier. At this time, other activated component carriers on the same radio frequency unit cannot be Scheduling and transceiving data, because the radio frequency unit operates in a narrow frequency range, tuning from the frequency of the active component carrier to the frequency of the deactivated component carrier; when not measuring, the frequency of the radio frequency unit needs to be tuned The frequency to the active component carrier. Since the radio frequency unit where the deactivated component carrier is located can work The narrower frequency band range, therefore, the power saving effect is better, but due to the lower measurement demand, the accuracy of the measurement report is affected to some extent within a certain time range. Furthermore, the low measurement requirement, in extreme cases, can also be a complete off measurement, ie no measurement of the deactivated component carrier.
  • the UE When the UE performs measurement according to high measurement requirements, it needs to tune the frequency of its own radio frequency unit to the frequency band containing the activated component carrier and the frequency band of the configured and deactivated component carrier; the radio frequency unit operates in a wide frequency range
  • the activated component carriers located on the same radio frequency unit as the deactivated component carriers can be scheduled and transceived simultaneously. Since the radio frequency unit in which the deactivated component carrier is located needs to operate in a wide frequency band, the power saving effect is relatively poor, but due to the high measurement demand, the accuracy of the measurement report is good within a certain time range.
  • the eNB determines, according to the scheduling policy, that the UE uses the high measurement requirement or the low measurement requirement, and the scheduling policy determines whether the component carrier needs to be activated and deactivated according to the change of the UE traffic volume, the change of the primary cell load, or the change of the wireless condition.
  • the UE traffic may be a downlink traffic, or an uplink traffic determined by the eNB according to a buffer status report (BSR, Buffer Status Report) reported by the UE;
  • the wireless condition change may be a primary cell wireless condition change, or The wireless condition of the component carrier that is configured and deactivated changes, or the wireless condition of the activated component carrier that is co-frequency with the configured and deactivated component carrier.
  • the eNB determines that the configured and deactivated cell needs to be activated, so that the measurement control signaling is sent to notify the UE to measure the configured and deactivated cell according to a high measurement requirement.
  • the eNB may determine whether to activate the cell according to the measurement result after acquiring the measurement report. Therefore, when the eNB needs to activate the cell, the eNB generally sends the measurement control signaling in advance.
  • the low measurement requirement is relative to the high measurement requirement.
  • the inter-frequency measurement requirement in LTE is lower than the same-frequency measurement requirement, so the above-mentioned low measurement requirement may be an inter-frequency measurement requirement in LTE, that is, configuration.
  • the measurement requirement of the deactivated component carrier is consistent with the inter-frequency cell measurement requirement, or is consistent with the measurement requirement of the activated component carrier configured DRX;
  • the high measurement requirement may be relative to the low inter-frequency measurement requirement, for example: the same frequency measurement requirement in LTE, that is, the measurement requirement of the component carrier configured and deactivated and the measurement of the same frequency cell or other activated serving cell
  • the requirements are consistent or consistent with the measurement requirements of the DRX configured for the active component carrier.
  • the measurement requirements for the DRX configuration here are higher than the DRX configuration for the low measurement requirements described above.
  • the measurement requirements include a measurement capability requirement of the UE, a frequency measurement number and time requirement, a number of cell detection times and time requirements, a number of cell measurement numbers, and a time requirement. Among them, the more the number of measurements, the shorter the measurement time, which means the higher the measurement demand. It should be noted that the present invention does not limit specific measurement requirement parameters. In the following description, the measurement requirements defined in the prior art are taken as an example, but the present invention is not limited to the above-mentioned defined measurement requirements. The same new measurement requirements may be applied in the future.
  • the carrier measurement method of the present invention is further elaborated in the following with the carrier measurement flowchart shown in FIG. 2, as shown in FIG. 2, which mainly includes the following steps:
  • Step 201 The UE performs measurement on a component carrier that is configured and deactivated according to a default measurement requirement.
  • the default measurement requirement is generally according to a low measurement requirement, and of course, may also be in accordance with a high measurement requirement.
  • Step 202 The eNB prepares to activate a component carrier that is configured and deactivated according to the scheduling policy, and sends measurement control signaling to notify the UE to perform measurement according to high measurement requirements.
  • Step 203 The UE performs measurement on the configured and deactivated component carrier according to high measurement requirements, for example: performing measurement according to the same frequency measurement requirement.
  • Step 204 When the periodic measurement report or the event-triggered measurement report condition is met, the UE reports the measurement result to the base station.
  • the periodic or event triggered measurement report is based on prior art.
  • the low measurement requirement is the same frequency measurement requirement
  • the high measurement requirement is the inter-frequency measurement requirement; or the low measurement requirement or the high measurement requirement that may be added in the future; the present invention does not limit the specific measurement requirement parameter.
  • the base station configures two carriers for the UE to perform carrier aggregation, which is a primary cell (Pcell) and a secondary cell (Scell), respectively. Both the Pcell and the Scell have both uplink and downlink carriers, and the downlink carrier of the Pcell belongs to the 2 GHz band, and the downlink carrier of the Scell belongs to the 800 MHz band.
  • the UE uses a multi-receiver technology for carrier aggregation of carriers that are isolated from such a frequency band, that is, a carrier of one frequency band is received by a set of independent RF receiving circuits.
  • the Pcell is activated by default, and the Scell is inactive by default. When the service traffic of the UE increases, the Scell is activated for data transmission.
  • the eNB may notify the UE to deactivate the Scell, or the UE may use the deactivation timer, when there is no data transmission for a period of time. Scell can enter the deactivated state by itself.
  • the eNB also configures corresponding measurements for the UE, and the eNB configures the UE to measure the frequency F1 where the Pcell is located, the frequency F2 where the Scell is located, and another frequency F3, and configure the Measurement GAP to be pattern 0.
  • the UE measures the frequency of the cell on the frequency at which the Pcell is located according to the same frequency measurement requirement of the non-DRX configuration, that is, the cell at the frequency of the Pcell is measured in a period of 200 ms, and the cell at the frequency of the F3 is in accordance with regulations.
  • the measurement period is 480N freq .
  • the measurement is performed according to the measurement requirement of the inter-frequency cell, so the UE measures other phases on the Scell and F2/F3. Like the neighboring cell, it is measured at each GAP, and the measurement requirement is 480N fre q according to the inter-frequency measurement. That is, Scell is measured in the GAP every 960 ms.
  • the UE When the UE receives the dedicated measurement control signaling of the eNB to indicate that the measurement is enabled according to the high measurement requirement (the same frequency measurement requirement in this embodiment), the UE performs measurement according to the same frequency measurement requirement, that is, the deactivated Scell is measured every 200 ms. Times; in order to meet the measurement requirements, for this In the embodiment, the UE may enable the independent radio frequency receiving circuit to measure the cell on the frequency where the Scell is located. If the Pcell and the Scell belong to the same frequency band, the PTU and the Scell belong to the 2G frequency band.
  • the receiver receives the Pcell and the Scell simultaneously, and measures, the Pcell and the Scell use the same measurement requirement; in the process of the UE performing the measurement according to the same frequency measurement requirement, if the dedicated measurement control signaling indication of the eNB is received, the measurement is performed according to the high measurement.
  • the dedicated measurement control signaling indication of the eNB is received, the measurement is performed according to the high measurement.
  • the demand measurement is off, the measurement is repeated according to the inter-frequency measurement requirement, and then the receiver is tuned to receive only the Pcell.
  • the Scell uses the inter-frequency measurement requirement, and when the GAP is used, the measurement is performed.
  • the low-measurement requirement can achieve the purpose of power saving.
  • it can also be configured in a manner similar to the DRX cycle.
  • the measurement cycle with DRX greater than 40ms is used every 5s. The measurement is performed once. The latter is more suitable for the Pcell to configure the DRX scenario.
  • the DRX cycle is configured to be 0.256s, the inter-frequency cell measurement period will be extended to 5.12N fre qS.
  • the present invention further provides a carrier measurement system, including: an eNB and a UE.
  • the eNB is configured to send measurement control signaling to the UE according to the scheduling policy, and instruct the UE to perform measurement on the configured and deactivated component carrier according to the specified measurement requirement;
  • the UE is configured to receive the measurement control instruction according to the indication in the measurement control instruction.
  • the component carrier that is configured and deactivated is measured according to the specified measurement requirements, and the measurement result is reported to the eNB.
  • the specified measurement requirements include: low measurement demand and high measurement demand; when the UE performs measurement according to low measurement requirements, it needs to tune the frequency of its own radio frequency unit to the desired measurement configuration and deactivate the frequency of the component carrier. When the UE performs measurement according to high measurement requirements, it needs to tune the frequency of its own radio frequency unit to the frequency band containing the activated component carrier and the frequency band of the component carrier that is configured and deactivated.
  • the functions implemented by the eNB and the UE and the carrier measurement method implemented by the eNB and the UE are the same as those described above, and are not described here.

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Description

一种载波测量方法和系统 技术领域
本发明涉及高级长期演进（ LTE-A , Long-Term Evolution Advanced )系 统中的载波测量技术， 尤其涉及一种载波测量方法和系统。 背景技术
第三代伙伴组织计划 （ 3GPP, Third Generation Partnership Projects )的 长期演进（LTE, Long Term Evolution ) 系统中， 下行（DL, Downlink ), 上行（ UL, Uplink )最大传输带宽分别为 20MHz。 LTE-A系统版本 10( Rel-10 ) 的载波聚合（ C A , Carrier Aggregation )在下行和 /或上行分别支持最多五个 分量载波（CC, Component Carrier )聚合起来以分别支持最大 100MHz传 输带宽， UL CC的总数配置小于或等于 DL CC的总数配置。
终端 （UE, User Equipment ) 分别配置一个下行主载波（ DL PCC , Downlink Primary CC )和一个上行主载波 ( UL PCC, Uplink Primary CC ), 可以配置 0~4个下行辅载波（ DL SCC, Downlink Secondary CC )和 /或 0~4 个上行辅载波（UL SCC, Uplink Secondary CC )„ UE初始接入或切换接入 的小区（Cell )称为主服务小区（PCell, Primary Cell ),由 DL PCC和 UL PCC 组成， DL PCC和 UL PCC通过系统信息广播 2 ( SIB2 ) 中所指示的信息相 关联。 因 UE业务流量增加或者基于基站（eNB ) 的无线资源管理（RRM, Radio Resource Management ) 需求， eNB可以通过无线资源控制 （RRC, Radio Resource Control )信令为 UE增加新的小区配置， 新增的小区称为辅 服务小区 （ SCell, Secondary Cell ), 由 SIB2关联的 DL SCC和 UL SCC组 成， 或者仅包括 DL SCC。 因 UE业务流量减少， 或者当前配置给 UE的小 区信号质量变差， 或者基于 eNB的 RRM管理， eNB可以通过 RRC信令删 除已经配置给 UE的小区，具体的包括所删除小区的上、下行载波的配置信 息。 以上增加、 删除小区配置的过程可以同时发生。
从 UE省电和 CC管理的角度出发， eNB可以通过媒体接入控制层控制 元 ( MAC CE, Medium Access Control Control Element )激活 /去激活某 DL SCC, DL PCC不能够被激活 /去激活。 UE在去激活状态的 DL SCC上不监 听物理下行控制信道（PDCCH, Physical Downlink Control Channel ), 不接 收物理下行共享信道 ( PDSCH, Physical Downlink Shared Channel ), 不进 行信道质量指示 （CQI, Channel Quality Indicator )相关的测量、 不接收系 统信息、 支持移动性相关的测量、 可以关闭相应的无线电射频单元。 3GPP 目前也在讨论是否需要支持 UL SCC激活 /去激活， 如果支持， UL SCC可 以和其关联的 DL SCC同时激活 /去激活或者独立激活 /去激活。 对于去激活 的 UL SCC, UE不在其物理上行共享信道（ PUSCH, Physical Uplink Shared Channel ) 发送数据， 不发送上行参考信号 （ SRS , Sounding Reference Symbols )。
图 1 是现有技术中载波聚合的示意图， 进行载波聚合的各个分量载波 在频域上可以是连续的， 也可以是不连续的。 要支持载波聚合， 以使 UE 可以同时工作在多个载波上， UE的射频结构需要满足相应的要求。 以频分 双工模式（FDD , Frequency Division Duplex ) 下 UE支持下行载波聚合为 例， 若接收两个或两个以上频域不连续的分量载波， UE需要有两个或两个 以上无线电接收设备（Rx, Receiver )才能同时在多个不连续的分量载波上 的接收数据； 若接收两个或两个以上频域连续的分量载波， 相对于单载波 系统中最大带宽为 20MHz的无线电接收设备， UE需要有一个最大带宽超 过 20MHz的无线电接收设备才能同时在多个连续的分量载波上接收数据， 或者如果 UE有多个无线电接收设备， UE可以使用该多个无线电接收设备 同时在该多个连续分量载波上接收数据。 同样， 对于 FDD下 UE支持上行 载波聚合， 若 UE 同时在两个或两个以上不连续的分量载波上发送数据，
UE需要有两个或两个以上无线电发送设备 ( Tx, Transmitter ); 若 UE同时 在两个或两个以上连续的分量载波上发送数据， UE需要有一个最大带宽超 过 20MHz的无线电发送设备， 或者两个或两个以上的无线电发送设备。 时 分双工模式（ TDD , Time Division Duplex )下 UE支持载波聚合原理与上述 FDD中相同。 以上 Receiver和 Transmitter在 UE上实现时可能归结为同一 个设备， 即统一的无线电收发设备（transceiver ), 或称无线电射频单元。
在 LTE系统内， 为了兼顾省电和测量需求， 对于系统内的频率分为两 种测量需求，分别是同频（ Intra-frequency )测量需求和异频（ Inter-frequency ) 测量需求。 测量需求包括： 小区的识别 （identify )时间、 小区的测量时间、 测量精度等。 在 LTE中测量主要用于支持切换判决， 同频切换的发生比异 频切换更频繁； 异频测量需要 UE 调整射频单元， 需要配置测量间隙 ( measurement GAP ),相对于同频测量只需在服务频点（ serving frequency ) 做测量更复杂， 所以同频的测量需求较异频测量需求更高。 以测量时间为 例， 在 LTE 中同频小区的测量周期时 200ms; 异频小区的测量周期和 measurement GAP的配置以及需要测量的频率（包括所有使用 GAP进行测 量的异频频率和异系统频率）个数相关， 当使用 GAP pattemO时， 测量周 期为 480Nfreq , 当使用 GAP patternl时， 测量周期为 240Nfreq, Nfreq为频率 个数。 在配置有不连续接收（DRX, Discontinuous Reception ) 的情况下， 考虑到省电的要求，同频和异频测量需求随着 DRX周期进一步进行了放宽。 当 DRX周期小于 40ms时，同频测量周期和未配置 DRX同频测量周期相同， 为 200ms; 当 DRX周期大于 40ms时， 同频测量周期为 5s。 异频测量周期 和 GAP pattern相关， 当 DRX周期小于 160ms时， 测量周期和未配置 DRX 同频测量周期相同； 当 DRX周期为 256ms时， 测量周期为 5.12Nfreq; 当 DRX周期为 320ms时， 测量周期为 6.4Nfreq。 根据现有技术， LTE-A的 UE在连接态 （ RRC_CON ECTED ) 时可能 存在 3种类型的分量载波： 配置并激活的分量载波、 配置并去激活的分量 载波、 未配置的分量载波。 对于配置并激活的分量载波， 沿用了 LTE的同 频测量需求； 对于未配置的分量载波， 釆用了异频测量要求。 而对于配置 并去激活的分量载波， 釆用哪种测量要求还没有确定。 由于去激活的分量 载波的测量更多的服务于载波管理部分， 即可以根据业务的变化， 快速的 激活去激活分量载波； 因此， 如果测量需求放松， 例如按照异频测量要求 进行测量， 将导致对去激活的分量载波无线质量变化的反映变慢； 而如果 去激活的分量载波和激活的分量载波使用相同的测量需求，将导致 UE比较 耗电。 发明内容
有鉴于此， 本发明的主要目的在于提供一种载波测量方法和系统， 以 实现对配置并去激活的分量载波的测量， 并达到兼顾测量准确度和省电的 目的。
为达到上述目的， 本发明的技术方案是这样实现的：
本发明提供了一种载波测量方法， 该方法包括：
基站（eNB ) 向终端 （UE )发送测量控制信令， 指示所述 UE按照指 定的测量需求对配置并去激活的分量载波进行测量；
所述 UE接收所述测量控制指令，根据所述测量控制指令中的指示，按 照指定的测量需求对配置并去激活的分量载波进行测量， 并向所述 eNB报 告测量结果。
所述指定的测量需求包括： 低测量需求和高测量需求；
所述 UE按照低测量需求进行测量时，需要调谐自身的无线电射频单元 的频点到所需测量的配置并去激活的分量载波的频点；
所述 UE按照高测量需求进行测量时，需要调谐自身的无线电射频单元 的频点至包含激活的分量载波的频带和所述配置并去激活的分量载波的频 带。
该方法进一步包括： 所述终端在接收到所述测量控制信令之前， 对配 置并去激活的分量载波按照缺省测量需求进行测量； 所述缺省测量需求为 低测量需求或高测量需求。
所述测量控制指令为无线资源控制 （RRC )信令或媒体接入控制层控 制元（MAC CE )。
所述测量控制指令中包括以下信息的至少一种： 所需测量的分量载波 的频点信息、 载波索引信息、 测量对象的标识（ID )。
所述基站基于调度策略发送所述测量控制信令， 所述调度决策为： 根 据 UE业务量变化、主小区负荷变化或无线条件变化情况决定是否需要激活 所述配置并去激活的分量载波。
所述 UE业务量为下行业务量、 或 eNB根据 UE上报的緩冲区状态报 告（BSR ) 所判断的上行业务量。
所述无线条件变化为： 主小区无线条件变化、 或所述配置并去激活的 分量载波的无线条件变化、 或与所述配置并去激活的分量载波同频的激活 的分量载波的无线条件变化。
所述测量需求包括以下参数： UE的测量能力要求、 频率测量个数和时 间要求、 小区检测个数和时间要求、 小区测量个数和时间要求。
本发明还提供了一种载波测量系统， 该系统包括： eNB和 UE, 其中， 所述 eNB, 用于向 UE发送测量控制信令， 指示所述 UE按照指定的测 量需求对配置并去激活的分量载波进行测量；
所述 UE, 用于接收所述测量控制指令， 根据所述测量控制指令中的指 示， 按照指定的测量需求对配置并去激活的分量载波进行测量， 并向所述 eNB报告测量结果。 所述指定的测量需求包括： 低测量需求和高测量需求；
所述 UE按照低测量需求进行测量时，需要调谐自身的无线电射频单元 的频点到所需测量的配置并去激活的分量载波的频点；
所述 UE按照高测量需求进行测量时，需要调谐自身的无线电射频单元 的频点至包含激活的分量载波的频带和所述配置并去激活的分量载波的频 带。
所述终端进一步用于， 在接收到所述测量控制信令之前， 对配置并去 激活的分量载波按照缺省测量需求进行测量； 所述缺省测量需求为低测量 需求或高测量需求。
所述测量控制指令为 RRC信令或 MAC CE。
所述测量控制指令中包括以下信息的至少一种： 所需测量的分量载波 的频点信息、 载波索引信息、 测量对象的 ID。
所述基站进一步用于， 基于调度策略发送所述测量控制信令， 所述调 度决策为：根据 UE业务量变化、主小区负荷变化或无线条件变化情况决定 是否需要激活所述配置并去激活的分量载波。
所述 UE业务量为下行业务量、 或 eNB根据 UE上报的 BSR所判断的 上行业务量。
所述无线条件变化为： 主小区无线条件变化、 或所述配置并去激活的 分量载波的无线条件变化、 或与所述配置并去激活的分量载波同频的激活 的分量载波的无线条件变化。
所述测量需求包括以下参数： UE的测量能力要求、 频率测量个数和时 间要求、 小区检测个数和时间要求、 小区测量个数和时间要求。
本发明所提供的一种载波测量方法和系统， eNB根据调度策略， 向 UE 发送测量控制信令，指示该 UE按照指定的测量需求对配置并去激活的分量 载波进行测量； UE接收该测量控制指令， 根据测量控制指令中的指示， 按 照指定的测量需求对配置并去激活的分量载波进行测量， 并向 eNB报告测 量结果。 通过本发明， 实现了对配置并去激活的分量载波的测量， 并兼顾 了测量去激活的分量载波的准确度和省电效果。 附图说明
图 1为现有技术中载波聚合的示意图；
图 2为本发明一种载波测量方法的流程图。 具体实施方式
下面结合附图和具体实施例对本发明的技术方案进一步详细阐述。 为实现 UE对配置并去激活的分量载波的测量，以达到兼顾测量准确度 和省电的目的，本发明所提供的一种载波测量方法， 旨在由 UE根据测量控 制信令的指示对配置并去激活的分量载波进行测量； 所述测量控制信令指 示 UE对配置并去激活的分量载波按照指定的测量需求（高测量需求或者低 测量需求）进行测量； 所述测量控制信令可以为无线资源控制（RRC, Radio Resources Control )信令或 MAC CE; 所述测量控制信令中包含以下信息的 至少一种： 所需测量的分量载波的频点信息、 载波索引信息、 测量对象的 标识（ID )。
UE在没有接收到所述测量控制信令的情况下，根据缺省测量需求进行 测量， 缺省测量需求可以按照低测量需求或者高测量需求。
UE按照低测量需求进行测量时， 需要调谐自身的无线电射频单元的频 点到所需测量的配置并去激活的分量载波的频点， 此时同一无线电射频单 元上的其它激活的分量载波无法被调度和收发数据， 因为无线电射频单元 工作在较窄的频率范围， 从激活的分量载波的频点调谐到去激活的分量载 波的频点； 在未进行测量时， 需要调谐无线电射频单元的频点到激活的分 量载波的频点。 由于去激活的分量载波所在的无线电射频单元可以工作在 较窄的频带范围， 因此， 省电效果较好， 但是由于测量需求较低， 在一定 时间范围内测量报告的准确度受到一定的影响。 此外， 所述低测量需求， 在极端情况下也可以为完全关闭测量， 即不对所述去激活的分量载波进行 测量。
UE按照高测量需求进行测量时， 需要调谐自身的无线电射频单元的频 点至包含激活的分量载波的频带和所述配置并去激活的分量载波的频带； 无线电射频单元工作在较宽的频率范围， 与去激活的分量载波位于同一无 线电射频单元上的激活的分量载波可以同时被调度和收发数据。 由于去激 活的分量载波所在的无线电射频单元需要工作在较宽的频带范围， 因此， 省电效果相对较差， 但是由于测量需求较高， 在一定时间范围内测量报告 的准确度较好。
eNB根据调度策略决定 UE使用高测量需求或者低测量需求进行测量， 所述调度策略为根据 UE业务量变化、主小区负荷变化或无线条件变化等情 况决定是否需要激活配置并去激活的分量载波。所述 UE业务量可以为下行 业务量、或 eNB根据 UE上报的緩冲区状态报告（ BSR, Buffer Status Report ) 所判断的上行业务量； 所述无线条件变化可以为主小区无线条件变化、 或 所述配置并去激活的分量载波的无线条件变化、 或与配置并去激活的分量 载波同频的激活的分量载波的无线条件变化。 例如： 当 UE业务量增加、 或 者主小区负荷增加、 或者主小区无线条件变差、 或者配置并去激活的分量 载波的无线条件变好、 或者与配置并去激活的小区同频的激活的小区的无 线条件变好时， eNB 决定需要激活所述配置并去激活的小区， 从而发送测 量控制信令通知 UE按照高的测量需求对所述配置并去激活的小区进行测 量。 eNB 可以在获取测量报告后根据测量结果决定是否激活所述小区， 因 此， eNB 在需要激活所述小区时一般会提前一定的时间发送所述测量控制 信令。 所述的低测量需求是相对于高测量需求而言的， 例如： LTE 中异频测 量需求要低于同频测量需求， 所以上述的低测量需求可以是 LTE中的异频 测量需求， 即配置并去激活的分量载波的测量需求和异频小区测量需求一 致， 或者与激活的分量载波配置的 DRX的测量需求一致；
所述的高测量需求可以是相对于低异频测量需求而言， 例如： LTE 中 同频测量需求， 即配置并去激活的分量载波的测量需求与同频小区或者其 它激活的服务小区的测量需求一致，或者与激活的分量载波配置的 DRX的 测量需求一致，此处的 DRX配置的测量需求要高于上述低测量需求的 DRX 配置。
所述的测量需求包括 UE的测量能力要求、 频率测量个数和时间要求、 小区检测个数和时间要求、 小区测量个数和时间要求。 其中， 测量个数越 多， 测量时间越短， 则意味着测量需求越高。 需要说明的是， 本发明并不 限定具体的测量需求参数， 后续描述中， 以现有技术中已定义的测量需求 为例， 但本发明并不限制只适用于上述已定义的测量需求， 对未来可能新 增的测量需求同样适用。
下面再结合图 2 所示的载波测量流程图， 对本发明的载波测量方法进 一步详细阐述， 如图 2所示， 主要包括以下步骤：
步骤 201 , UE对于某配置并去激活的分量载波按照缺省测量需求进行 测量， 缺省测量需求一般按照低测量需求， 当然， 也可以按照高测量需求。
步骤 202, eNB根据调度策略， 准备激活某配置并去激活的分量载波， 并发送测量控制信令， 通知 UE按高测量需求进行测量。
步骤 203 , UE按照高测量需求对配置并去激活的分量载波进行测量， 例如： 按照同频测量需求进行测量。
步骤 204, 周期性测量报告或事件触发的测量报告条件满足时， UE向 基站报告测量结果。 所述周期性或事件触发测量报告基于现有技术。 前述测量步骤中， 低测量需求为同频测量需求， 高测量需求为异频测 量需求； 或者也为未来可能新增的低测量需求或高测量需求； 本发明不限 定具体的测量需求参数。
下面举例对图 2所示的载波测量方法继续进行阐述。
基站为 UE配置了两个载波进行载波聚合， 分别为主小区（Pcell )和辅 小区（Scell )。 Pcell和 Scell同时都有上下行载波， 并且 Pcell的下行载波属 于 2GHz频段， Scell的下行载波属于 800MHz频段。 一般情况下， UE对于 这种频段隔离较远的载波进行载波聚合时釆用多接收机技术， 即一个频段 的载波釆用一组独立的射频接收电路进行接收。 Pcell默认处于激活状态， Scell默认处于非激活状态。 当 UE的业务流量增加时， Scell被激活用于数 据传输， 当业务流量减少时， eNB可以通知 UE将 Scell去激活， 或者 UE 会根据去激活定时器， 当一段时间内没有任何数据传输时， Scell可以自行 进入去激活状态。 此外 , eNB还给 UE配置了相应的测量 , eNB配置 UE 对 Pcell所在的频率 Fl , Scell所在的频率 F2 , 以及另一个频率 F3进行测 量， 同时配置 Measurement GAP为 pattern 0。 按照 LTE的测量要求， UE对 Pcell所在的频率上小区测量按照非 DRX配置的同频测量要求，即以 200ms 为周期对 Pcell所在频率的小区进行测量， 对 F3所在频率上的小区， 按照 规定， 测量周期为 480Nfreq。
按照本发明， 对于去激活的分量载波 Scell的测量， 当 UE没有接收到 eNB的专用测量控制信令时， 按照异频小区的测量需求进行测量， 所以 UE 测量 Scell和 F2/F3上的其它相邻小区一样，在每个 GAP时，对其进行测量， 按异频测量要求测量要求为 480Nfreq, 此时
Figure imgf000012_0001
即每 960ms在 GAP内 测量 Scell—次。 当 UE接收到 eNB的专用测量控制信令指示按照高测量需 求（本实施例中为同频测量需求）测量为开启时， UE按照同频测量需求进 行测量， 即每 200ms测量去激活的 Scell—次； 为了满足测量要求， 对于本 实施例由于 UE有多余的未使用的射频接收电路时， UE可以启用该独立的 射频接收电路， 对 Scell所在的频率上小区进行测量； 如果 Pcell和 Scell属 于同一频段， 如同属于 2G频段， 则调谐其接收机， 对 Pcell和 Scell同时进 行接收， 并测量， Pcell和 Scell使用相同测量要求； 在 UE按照同频测量需 求进行测量的过程中， 如果接收到 eNB的专用测量控制信令指示按照高测 量需求测量为关闭时， 则重新按照异频测量需求进行测量， 再调谐其接收 机， 只接收 Pcell, 对 Scell釆用异频测量需求， 在 GAP时， 进行测量。
对于去激活的 Scell釆用低测量需求， 可以达到省电的目的， 除了前面 描述的异频测量需求， 还可以是配置类似 DRX 周期的方式进行， 如釆用 DRX大于 40ms的测量周期， 每 5s测量一次， 后者较适合用于 Pcell配置 了 DRX场景， 如 DRX周期配置为 0.256s, 此时异频小区测量周期将延长 到 5.12NfreqS。
对应上述载波测量方法， 本发明还提供了一种载波测量系统， 包括： eNB和 UE。 其中， eNB用于根据调度策略， 向 UE发送测量控制信令， 指 示 UE按照指定的测量需求对配置并去激活的分量载波进行测量； UE用于 接收测量控制指令， 根据测量控制指令中的指示， 按照指定的测量需求对 配置并去激活的分量载波进行测量， 并向 eNB 告测量结果。
所述指定的测量需求包括： 低测量需求和高测量需求； UE按照低测量 需求进行测量时， 需要调谐自身的无线电射频单元的频点到所需测量的配 置并去激活的分量载波的频点； UE按照高测量需求进行测量时， 需要调谐 自身的无线电射频单元的频点至包含激活的分量载波的频带和配置并去激 活的分量载波的频带。 eNB和 UE各自所实现的功能， 以及 eNB和 UE进 行交互所实现的载波测量方法与前述相同， 此处不再赘述。
以上所述， 仅为本发明的较佳实施例而已， 并非用于限定本发明的保 护范围。

Claims

权利要求书
1、 一种载波测量方法， 其特征在于， 该方法包括：
基站（eNB ) 向终端 （UE )发送测量控制信令， 指示所述 UE按照指 定的测量需求对配置并去激活的分量载波进行测量；
所述 UE接收所述测量控制指令，根据所述测量控制指令中的指示，按 照指定的测量需求对配置并去激活的分量载波进行测量， 并向所述 eNB报 告测量结果。
2、 根据权利要求 1所述载波测量方法， 其特征在于， 所述指定的测量 需求包括： 低测量需求和高测量需求；
所述 UE按照低测量需求进行测量时，需要调谐自身的无线电射频单元 的频点到所需测量的配置并去激活的分量载波的频点；
所述 UE按照高测量需求进行测量时，需要调谐自身的无线电射频单元 的频点至包含激活的分量载波的频带和所述配置并去激活的分量载波的频 带。
3、 根据权利要求 1或 2所述载波测量方法， 其特征在于， 该方法进一 步包括： 所述终端在接收到所述测量控制信令之前， 对配置并去激活的分 量载波按照缺省测量需求进行测量； 所述缺省测量需求为低测量需求或高 测量需求。
4、 根据权利要求 1或 2所述载波测量方法， 其特征在于， 所述测量控 制指令为无线资源控制 ( RRC )信令或媒体接入控制层控制元 ( MAC CE )。
5、 根据权利要求 1或 2所述载波测量方法， 其特征在于， 所述测量控 制指令中包括以下信息的至少一种： 所需测量的分量载波的频点信息、 载 波索引信息、 测量对象的标识 （ID )。
6、 根据权利要求 1或 2所述载波测量方法， 其特征在于， 所述基站基 于调度策略发送所述测量控制信令，所述调度决策为：根据 UE业务量变化、 主小区负荷变化或无线条件变化情况决定是否需要激活所述配置并去激活 的分量载波。
7、 根据权利要求 6所述载波测量方法， 其特征在于， 所述 UE业务量 为下行业务量、 或 eNB根据 UE上报的緩冲区状态报告 ( BSR )所判断的 上行业务量。
8、 根据权利要求 6所述载波测量方法， 其特征在于， 所述无线条件变 化为： 主小区无线条件变化、 或所述配置并去激活的分量载波的无线条件 变化、 或与所述配置并去激活的分量载波同频的激活的分量载波的无线条 件变化。
9、 根据权利要求 1或 2所述载波测量方法， 其特征在于， 所述测量需 求包括以下参数： UE的测量能力要求、 频率测量个数和时间要求、 小区检 测个数和时间要求、 小区测量个数和时间要求。
10、 一种载波测量系统， 其特征在于， 该系统包括： eNB和 UE, 其中， 所述 eNB, 用于向 UE发送测量控制信令， 指示所述 UE按照指定的测 量需求对配置并去激活的分量载波进行测量；
所述 UE, 用于接收所述测量控制指令， 根据所述测量控制指令中的指 示， 按照指定的测量需求对配置并去激活的分量载波进行测量， 并向所述 eNB报告测量结果。
11、 根据权利要求 10所述载波测量系统， 其特征在于， 所述指定的测 量需求包括： 低测量需求和高测量需求；
所述 UE按照低测量需求进行测量时，需要调谐自身的无线电射频单元 的频点到所需测量的配置并去激活的分量载波的频点；
所述 UE按照高测量需求进行测量时，需要调谐自身的无线电射频单元 的频点至包含激活的分量载波的频带和所述配置并去激活的分量载波的频 带。
12、 根据权利要求 10或 11所述载波测量方法， 其特征在于， 所述终 端进一步用于， 在接收到所述测量控制信令之前， 对配置并去激活的分量 载波按照缺省测量需求进行测量； 所述缺省测量需求为低测量需求或高测 量需求。
13、 根据权利要求 10或 11所述载波测量系统， 其特征在于， 所述测 量控制指令为 RRC信令或 MAC CE。
14、 根据权利要求 10或 11所述载波测量系统， 其特征在于， 所述测 量控制指令中包括以下信息的至少一种： 所需测量的分量载波的频点信息、 载波索引信息、 测量对象的 ID。
15、 根据权利要求 10或 11所述载波测量系统， 其特征在于， 所述基 站进一步用于， 基于调度策略发送所述测量控制信令， 所述调度决策为： 根据 UE业务量变化、主小区负荷变化或无线条件变化情况决定是否需要激 活所述配置并去激活的分量载波。
16、 根据权利要求 15所述载波测量系统， 其特征在于， 所述 UE业务 量为下行业务量、 或 eNB根据 UE上报的 BSR所判断的上行业务量。
17、 根据权利要求 15所述载波测量系统， 其特征在于， 所述无线条件 变化为： 主小区无线条件变化、 或所述配置并去激活的分量载波的无线条 件变化、 或与所述配置并去激活的分量载波同频的激活的分量载波的无线 条件变化。
18、 根据权利要求 10或 11所述载波测量系统， 其特征在于， 所述测 量需求包括以下参数： UE的测量能力要求、 频率测量个数和时间要求、 小 区检测个数和时间要求、 小区测量个数和时间要求。
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