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CN102938903B - A kind of method avoiding measurement to conflict with data transmission opportunity opportunity and device - Google Patents

A kind of method avoiding measurement to conflict with data transmission opportunity opportunity and device Download PDF

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CN102938903B
CN102938903B CN201210419733.XA CN201210419733A CN102938903B CN 102938903 B CN102938903 B CN 102938903B CN 201210419733 A CN201210419733 A CN 201210419733A CN 102938903 B CN102938903 B CN 102938903B
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data transmission
conflict
measurement
dmo
tti
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CN102938903A (en
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苏岚
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2013/078621 priority patent/WO2013167017A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0088—Scheduling hand-off measurements

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Information Transfer Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Small-Scale Networks (AREA)

Abstract

本发明公开了一种避免测量时机与数据传输时机冲突的方法，包括：在每个数据传输的传输时间间隔(TTI)的边界进行冲突仲裁，并输出仲裁结果；根据仲裁结果给出冲突解决方式：测量退让或者数据传输退让。本发明同时还公开了一种避免测量时机与数据传输时机冲突的装置，采用本发明所述方法及装置，当测量时机与数据传输时机产生冲突时能够确保长期演进(LTE)制式的无线接入技术(RAT)测量与当前制式的数据传输都能够正常进行。

The invention discloses a method for avoiding the conflict between measurement timing and data transmission timing, which includes: performing conflict arbitration at the boundary of each transmission time interval (TTI) of data transmission, and outputting the arbitration result; providing a conflict resolution method according to the arbitration result : Measurement backoff or data transmission backoff. The present invention also discloses a device for avoiding conflicts between measurement timing and data transmission timing. By adopting the method and device of the present invention, when the measurement timing and data transmission timing conflict, the wireless access of the long-term evolution (LTE) standard can be ensured Technology (RAT) measurements and data transfers for the current format can be performed normally.

Description

Method and device for avoiding conflict between measurement opportunity and data transmission opportunity
Technical Field
The present invention relates to the field of wireless communication management technologies, and in particular, to a method and an apparatus for avoiding a collision between a measurement opportunity and a data transmission opportunity.
Background
The Universal Mobile Telecommunications System (UMTS) is one of the third generation mobile communication systems (3G), and its network structure is composed of a Core Network (CN), a Universal Terrestrial Radio Access Network (UTRAN) and User Equipment (UE), and the UTRAN and the UE communicate with each other through an air interface (Uu interface). The Long Term Evolution (LTE) communication system is an evolution of 3G, also known as 3.9G, with 100Mbps data download capability, LTE improving and enhancing the over-the-air access technology of 3G.
In order to support Radio Access Technology (RAT) measurement of an LTE system, a configuration is added in Radio Resource Control (RRC) signaling measurement control information between a network and a terminal, and the configuration is a dedicated dynamic measurement scenario (DMO) configuration and is used for providing RAT measurement opportunity. The DMO configuration provides a time series pattern of one or more measurement occasions consisting of a repetition period, an offset, a length, and a slot bitmap; in the time sequence taking the system frame as the unit, the parameter uniquely determines which time slots of which system frames are configured to be used for the RAT measurement for the LTE standard.
Data transmission of the UMTS terminal is performed according to parameters such as Transmission Time Interval (TTI) and time slot configured by RRC, and in the case of data transmission, in a time sequence using a system frame as a unit, there may be data transmission in the time slot configured in each time unit.
Thus, the measurement occasion configured by the DMO may possibly collide with the data transmission occasion, and as a result of the collision, the RAT measurement of the LTE system may be affected or the data transmission of the current system may be affected. The degree of influence depends on the probability of collision, the greater the degree of influence. In a multi-mode network environment, if the probability of a conflict between a measurement opportunity configured by a DMO and an opportunity of data transmission is high, serious consequences such as interruption of data transmission, failure of RAT handover, and the like may be caused.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a method and an apparatus for avoiding a measurement opportunity and a data transmission opportunity from colliding, which can ensure that RAT measurement of an LTE system and data transmission of a current system are both performed normally.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a method for avoiding conflict between measurement opportunity and data transmission opportunity, which comprises the following steps:
performing conflict arbitration on the boundary of the transmission time interval TTI of each data transmission, and outputting an arbitration result;
and giving a conflict resolution mode according to an arbitration result: measurement deferral or data transmission deferral.
In the above scheme, the performing collision blanking is: and judging whether the DMO configuration time of the special measurement scene conflicts with the data transmission time, and generating an arbitration result by acquiring DMO configuration information, TTI (transmission time interval) and time slot configuration information related to data transmission and data cache information.
In the above scheme, the determining whether the special measurement scenario DMO configuration time conflicts with the data transmission time is as follows:
if the time slot configured by the DMO is completely different from the time slot configured by the data transmission, judging that no conflict exists;
and if the time slot configured by the DMO is partially or completely the same as the time slot configured by the data transmission, further judging according to the existence of the data to be transmitted.
In the above scheme, the further determination according to the existence of the data to be transmitted is as follows:
if the cached data is to be transmitted in the TTI of the data transmission and the overlapped part exists between the TTI and the DMO measurement occasion, judging that a conflict exists;
if the cached data are ready to be transmitted in the TTI of the data transmission and the overlapped part does not exist between the TTI and the DMO measurement time, judging that no conflict exists;
and if no buffered data is ready to be transmitted in the TTI of the data transmission, judging that no conflict exists.
In the above scheme, the measurement yielding is as follows: only data transmission is performed without measurement; the data transmission back-off is as follows: only measurements are made and no data transmission is performed.
The invention also provides a device for avoiding the conflict between the measurement opportunity and the data transmission opportunity, which comprises a conflict arbitration module and a conflict resolution module; wherein,
the conflict arbitration module is used for carrying out conflict arbitration on the boundary of each data transmission TTI and outputting an arbitration result to the conflict resolution module;
the conflict resolution module is used for giving a conflict resolution mode according to the arbitration result output by the conflict arbitration module: measurement deferral or data transmission deferral.
In the above scheme, the conflict arbitration module performs conflict blanking as follows: the conflict arbitration module judges whether the DMO configuration time conflicts with the data transmission time, generates an arbitration result by acquiring DMO configuration information, TTI (transmission time interval) and time slot configuration information related to data transmission and data cache information, and outputs the arbitration result to the conflict resolution module.
In the above scheme, the determining, by the conflict arbitration module, whether a conflict exists between the DMO configuration time and the data transmission time is as follows:
if the time slot configured by the DMO is completely different from the time slot configured by the data transmission, the conflict arbitration module judges that no conflict exists;
if the time slot configured by the DMO is partially or completely the same as the time slot configured by the data transmission, the conflict arbitration module further judges whether the data to be transmitted exists or not.
In the above scheme, the conflict arbitration module further determines whether there is data to be transmitted:
if the cached data is ready to be transmitted in the TTI of the data transmission and the overlapped part exists between the TTI and the DMO measurement time, the conflict arbitration module judges that a conflict exists;
if the cached data is ready to be transmitted in the TTI of the data transmission and the overlapped part does not exist between the TTI and the DMO measurement time, the conflict arbitration module judges that no conflict exists;
and if no cached data is ready to be transmitted in the TTI of the data transmission, the conflict arbitration module judges that no conflict exists.
According to the method and the device for avoiding the conflict between the measurement opportunity and the data transmission opportunity, the conflict arbitration module carries out conflict arbitration at the boundary of each data transmission TTI and outputs an arbitration result to the conflict resolution module; for the case of no conflict, the conflict resolution module does not need to perform additional intervention; for the case of conflict, the conflict resolution module will give the conflict resolution: measurement deferral or data transmission deferral. Therefore, the invention solves the problem of how to ensure normal RAT measurement and data transmission when the measurement time configured by the DMO conflicts with the data transmission time.
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FIG. 1 is a schematic diagram of a device for avoiding a collision between a measurement opportunity and a data transmission opportunity according to the present invention;
FIG. 2 is a flow chart illustrating an implementation of the method for avoiding a conflict between a measurement opportunity and a data transmission opportunity according to the present invention;
FIG. 3 is a flow chart of the functional implementation of the conflict arbitration module according to the embodiment of the present invention;
fig. 4 is a flowchart of a functional implementation of a conflict resolution module according to an embodiment of the present invention.
Detailed Description
The basic idea of the invention is as follows: performing conflict arbitration at the boundary of each data transmission TTI, and for the case of no conflict, not needing to perform additional conflict resolution intervention; determining measurement back-off or data transmission back-off for the case of collision; therefore, when the measurement time configured by the DMO conflicts with the time of data transmission, the RAT measurement of the LTE system and the data transmission of the current system can be ensured to be normally carried out.
Fig. 1 is a schematic diagram of a structure of an apparatus for avoiding a collision between a measurement opportunity and a data transmission opportunity according to the present invention, as shown in fig. 1, the apparatus includes: a conflict arbitration module 11 and a conflict resolution module 12; wherein,
a conflict arbitration module 11, configured to perform conflict arbitration at the boundary of each data transmission TTI, and output an arbitration result to the conflict resolution module 12;
specifically, the conflict arbitration is as follows: judging whether the DMO configuration time conflicts with the data transmission time, generating an arbitration result by acquiring DMO configuration information, TTI (transmission time interval) and time slot configuration information related to data transmission and data cache information, and outputting the arbitration result to a conflict solution module 12;
and the conflict resolution module 12 is used for giving a conflict resolution mode according to the arbitration result: measuring a back-off or a data transmission back-off;
that is, the conflict resolution module 12 coordinates RAT measurement operation and data transmission operation of the LTE system according to the arbitration result; the measurement yielding refers to that the measurement yielding is in data transmission, and only the data transmission is carried out without measurement; data transmission yielding refers to data transmission yielding in measurement, and only measurement is carried out without data transmission.
At the boundary of each data transmission TTI, the conflict arbitration module 11 performs conflict arbitration and outputs the arbitration result to the conflict resolution module 12. For the case of no conflict, the conflict resolution module 12 does not need to perform additional conflict resolution intervention. For the case of conflict, the conflict resolution module 12 gives a conflict resolution mode according to the arbitration result: measurement deferral or data transmission deferral.
Fig. 2 is a schematic flow chart illustrating an implementation of the method for avoiding a collision between a measurement opportunity and a data transmission opportunity according to the present invention, as shown in fig. 2, the method includes:
step 201: performing conflict arbitration at the boundary of each data transmission TTI, and outputting an arbitration result;
here, the collision blanking is: and judging whether the DMO configuration time conflicts with the data transmission time by a conflict arbitration module, generating an arbitration result by acquiring DMO configuration information, TTI (transmission time interval) and time slot configuration information related to data transmission and data cache information, and outputting the arbitration result to a conflict resolution module.
Specifically, the criterion for determining whether the DMO configuration time conflicts with the data transmission configuration time is:
(1) if the time slot configured by the DMO is completely different from the time slot configured by the data transmission, no conflict is considered;
(2) if the time slot of the DMO configuration is partially or completely the same as the time slot of the data transmission configuration:
(2.1) if buffered data is ready to be transmitted in the next data transmission TTI and a part of the TTI is overlapped with the DMO measurement occasion, determining that a conflict exists;
(2.2) if there is buffered data to be transmitted in the next data transmission TTI and there is no overlapping part of the TTI and the DMO measurement occasion, then there is no conflict;
(2.3) if no buffered data is pending for transmission in the next data transmission TTI, then no collision is considered.
Step 202: and giving a conflict resolution mode according to an arbitration result: measurement deferral or data transmission deferral.
Specifically, the conflict resolution module gives a conflict resolution mode according to the arbitration result as follows:
firstly, a conflict resolution module generates a random number P, and the value range is [0,1 ]; comparing the random number P with a preset threshold value P _ thres;
here, the value range of P _ thres is also [0,1], for example, P _ thres may be 0.1; if P is less than P _ thres, adopting a data transmission deferral mode, otherwise adopting a measurement deferral mode; the value of P _ thres can be determined according to the quality of service (QoS) of data transmission, and the higher the QoS of data transmission, the smaller the P _ thres.
In addition, in order to prevent the measurement back-off or the data transmission back-off from occurring continuously for a long time and affecting the measurement function or the data transmission function, two counters Cm and Cd can be further arranged and used for recording the continuous occurrence frequency of the measurement back-off and the continuous occurrence frequency of the data transmission back-off respectively, and the initial values of Cm and Cd are both set to be 0. When one measurement yield occurs, adding 1 to Cm; then, adding 1 to Cm every time measurement yielding continuously occurs; when data transmission yielding occurs, Cm is reset to 0; when the value of Cm is greater than or equal to the predetermined continuous back-off threshold Cm _ thres, the next back-off must be the data transmission back-off, and the value of Cm is reset to 0. Similarly, when data transmission yielding occurs once, adding 1 to Cd; then, adding 1 to Cd every time data transmission yielding continuously occurs; when one measurement back-off occurs, Cd is reset to 0; when the value of Cd is greater than or equal to the predetermined continuous back-off threshold Cd _ thres, the next back-off must be the measured back-off, and the value of Cd is reset to 0.
Fig. 3 is a schematic flow chart of a functional implementation of a conflict arbitration module according to an embodiment of the present invention, and as shown in fig. 3, the functional implementation of the conflict arbitration module in the embodiment includes the following steps:
step 301: and collecting DMO configuration information, data transmission configuration information and data buffering information at the data transmission TTI boundary.
Step 302: judging whether the time slot information of the DMO configuration is completely different from the time slot information of the data transmission configuration, if so, executing a step 305; otherwise, step 303 is performed.
Step 303: judging whether data to be transmitted does not exist, if not, executing step 305; otherwise, step 304 is performed.
Step 304: judging whether the TTI of the data transmission and the time sequence pattern in the DMO configuration have an overlapped part, if not, executing step 305; otherwise, step 306 is performed.
Step 305: the arbitration result is set to conflict free, and step 307 is executed.
Step 306: the arbitration result is set to conflict, and step 307 is executed.
Step 307: and outputting an arbitration result.
Fig. 4 is a schematic flow chart of the functional implementation of the conflict resolution module according to the embodiment of the present invention, and as shown in fig. 4, the functional implementation of the conflict resolution module in the embodiment includes the following steps:
step 401-402: obtaining the arbitration result of conflict, if the arbitration result is not conflict, executing step 413; otherwise, step 403 is performed.
Step 403-404: generating a random number P of [0,1], judging whether P is smaller than a preset threshold value P _ thres, if so, executing step 405; otherwise, step 408 is performed.
Step 405: the continuous measurement back-off count value Cm is set to 0, and the continuous data transmission back-off count value Cd is incremented by 1, and step 406 is executed.
Step 406: judging whether Cd is greater than or equal to the maximum continuous data transmission deferral time Cd _ thres, if so, executing step 407; otherwise, step 412 is performed.
Step 407: the continuous data transmission back-off count value Cd is set to 0, the continuous measurement back-off count value Cm is incremented by 1, and step 411 is executed.
Step 408: the continuous data transmission back-off count value Cd is set to 0, the continuous measurement back-off count value Cm is incremented by 1, and step 409 is executed.
Step 409: judging whether Cm is more than or equal to the maximum continuous measurement yielding times Cm _ thres, if so, executing step 410; otherwise, step 411 is executed.
Step 410: the continuous measurement back-off count value Cm is set to 0, and the continuous data transmission back-off count value Cd is incremented by 1, and step 412 is executed.
Step 411: perform measurement back-off, suspend measurement, start data transmission, perform step 413.
Step 412: perform a data transfer back-off, suspend data transfer, initiate measurement, go to step 413.
Step 413: and (6) ending.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (8)

1.一种避免测量时机与数据传输时机冲突的方法，其特征在于，所述方法包括： 1. A method for avoiding conflicts between measurement opportunities and data transmission opportunities, characterized in that the method comprises: 在每个数据传输的传输时间间隔TTI的边界进行冲突仲裁，并输出仲裁结果； Collision arbitration is performed at the boundary of the transmission time interval TTI of each data transmission, and the arbitration result is output; 根据仲裁结果给出冲突解决方式：测量退让或者数据传输退让；其中， According to the arbitration result, the conflict resolution method is given: measurement concession or data transmission concession; among them, 如果所述仲裁结果冲突，生成一个属于[0,1]的随机小数P，如果所述P大于或者等于预设的门限值，执行所述测量退让；其中，当连续测量退让次数大于或者等于预先设定的第一连续退让门限值时，下次退让为所述数据传输退让；如果所述P小于所述门限值，执行所述数据传输退让；其中，当连续数据传输退让次数大于或者等于预先设定的第二连续退让门限值时，所述下次退让为所述测量退让； If the arbitration result conflicts, generate a random decimal P belonging to [0,1], if the P is greater than or equal to the preset threshold value, perform the measurement concession; wherein, when the number of consecutive measurement concessions is greater than or equal to When the first continuous backoff threshold is preset, the next backoff is the data transmission backoff; if the P is less than the threshold value, perform the data transmission backoff; wherein, when the number of consecutive data transmission backoffs is greater than or when it is equal to the preset second continuous backoff threshold, the next backoff is the measurement backoff; 所述进行冲突冲裁为：判断专用态测量场景DMO配置时机与数据传输时机是否存在冲突，通过获取DMO配置信息、数据传输相关的TTI和时隙配置信息、以及数据缓存信息来产生仲裁结果。 The conflict resolution is: judging whether there is a conflict between the DMO configuration timing and the data transmission timing in the dedicated state measurement scenario, and generating an arbitration result by obtaining DMO configuration information, TTI and time slot configuration information related to data transmission, and data buffer information. 2.根据权利要求1所述的方法，其特征在于，所述判断专用态测量场景DMO配置时机与数据传输时机是否存在冲突为： 2. The method according to claim 1, wherein the judging whether there is a conflict between the DMO configuration timing and the data transmission timing of the dedicated state measurement scene is: 如果DMO配置的时隙与数据传输配置的时隙完全不同，则判断没有冲突； If the time slot configured by DMO is completely different from the time slot configured for data transmission, it is judged that there is no conflict; 如果DMO配置的时隙与数据传输配置的时隙有部分或者完全相同，则根据有无待传输数据做进一步判断。 If the time slot configured for DMO is partially or completely identical to the time slot configured for data transmission, further judgment is made based on whether there is data to be transmitted. 3.根据权利要求2所述的方法，其特征在于，所述根据有无待传输数据做进一步判断为： 3. The method according to claim 2, wherein the further judgment is made according to whether there is data to be transmitted: 如果在数据传输的TTI内，有缓存的数据待传输，并且所述TTI与DMO测量时机存在重合的部分，则判断有冲突； If within the TTI of data transmission, there is buffered data to be transmitted, and the TTI and the DMO measurement timing overlap, then it is determined that there is a conflict; 如果在数据传输的TTI内，有缓存的数据待传输，并且所述TTI与DMO测量时机不存在重合的部分，则判断没有冲突； If there is buffered data to be transmitted within the TTI of data transmission, and there is no overlapping part between the TTI and the DMO measurement timing, then it is judged that there is no conflict; 如果在数据传输的TTI内，没有缓存的数据待传输，则判断没有冲突。 If there is no buffered data to be transmitted within the TTI of data transmission, it is determined that there is no conflict. 4.根据权利要求1、2或3所述的方法，其特征在于，所述测量退让为：只进行数据传输而不进行测量； 4. The method according to claim 1, 2 or 3, wherein the measurement compromise is: only data transmission is performed without measurement; 所述数据传输退让为：只进行测量而不进行数据传输。 The data transmission concession is: only perform measurement without data transmission. 5.一种避免测量时机与数据传输时机冲突的装置，其特征在于，所述装置包括冲突仲裁模块和冲突解决模块；其中， 5. A device for avoiding conflicts between measurement opportunities and data transmission opportunities, characterized in that the device includes a conflict arbitration module and a conflict resolution module; wherein, 冲突仲裁模块，用于在每个数据传输TTI的边界进行冲突仲裁，并将仲裁结果输出给冲突解决模块； A conflict arbitration module, configured to perform conflict arbitration at the boundary of each data transmission TTI, and output the arbitration result to the conflict resolution module; 冲突解决模块，用于根据冲突仲裁模块输出的仲裁结果给出冲突解决方式：测量退让或者数据传输退让；其中， The conflict resolution module is used to provide a conflict resolution method according to the arbitration result output by the conflict arbitration module: measurement concession or data transmission concession; wherein, 如果所述仲裁结果冲突，生成一个属于[0,1]的随机小数P，如果所述P大于或者等于预设的门限值，执行所述测量退让；其中，当连续测量退让次数大于或者等于预先设定的第一连续退让门限值时，下次退让为所述数据传输退让；如果所述P小于所述门限值，执行所述数据传输退让；其中，当连续数据传输退让次数大于或者等于预先设定的第二连续退让门限值时，所述下次退让为所述测量退让； If the arbitration result conflicts, generate a random decimal P belonging to [0,1], if the P is greater than or equal to the preset threshold value, perform the measurement concession; wherein, when the number of consecutive measurement concessions is greater than or equal to When the first continuous backoff threshold is preset, the next backoff is the data transmission backoff; if the P is less than the threshold value, perform the data transmission backoff; wherein, when the number of consecutive data transmission backoffs is greater than or when it is equal to the preset second continuous backoff threshold, the next backoff is the measurement backoff; 所述冲突仲裁模块进行冲突冲裁为：冲突仲裁模块判断DMO配置时机与数据传输时机是否存在冲突，通过获取DMO配置信息、数据传输相关的TTI和时隙配置信息、以及数据缓存信息来产生仲裁结果，并将仲裁结果输出冲突解决模块。 The conflict arbitration module performs conflict resolution as follows: the conflict arbitration module judges whether there is a conflict between the DMO configuration timing and the data transmission timing, and generates arbitration by obtaining DMO configuration information, TTI and time slot configuration information related to data transmission, and data cache information result, and output the arbitration result to the conflict resolution module. 6.根据权利要求5所述的装置，其特征在于，所述冲突仲裁模块判断DMO配置时机与数据传输时机是否存在冲突为： 6. The device according to claim 5, wherein the conflict arbitration module determines whether there is a conflict between the DMO configuration timing and the data transmission timing as: 如果DMO配置的时隙与数据传输配置的时隙完全不同，则冲突仲裁模块判断没有冲突； If the time slot configured by DMO is completely different from the time slot configured for data transmission, the conflict arbitration module judges that there is no conflict; 如果DMO配置的时隙与数据传输配置的时隙有部分或者完全相同，则冲突仲裁模块根据有无待传输数据做进一步判断。 If the time slot configured by DMO is partially or completely identical to the time slot configured for data transmission, the conflict arbitration module makes a further judgment according to whether there is data to be transmitted. 7.根据权利要求6所述的装置，其特征在于，所述冲突仲裁模块根据有无待传输数据做进一步判断为： 7. The device according to claim 6, wherein the conflict arbitration module makes a further judgment according to whether there is data to be transmitted: 如果在数据传输的TTI内，有缓存的数据待传输，并且所述TTI与DMO测量时机存在重合的部分，则冲突仲裁模块判断有冲突； If there is buffered data to be transmitted within the TTI of data transmission, and the TTI and the DMO measurement timing overlap, the conflict arbitration module judges that there is a conflict; 如果在数据传输的TTI内，有缓存的数据待传输，并且所述TTI与DMO测量时机不存在重合的部分，则冲突仲裁模块判断没有冲突； If there is buffered data to be transmitted within the TTI of data transmission, and there is no overlapping part between the TTI and the DMO measurement timing, the conflict arbitration module judges that there is no conflict; 如果在数据传输的TTI内，没有缓存的数据待传输，则冲突仲裁模块判断没有冲突。 If there is no cached data to be transmitted within the TTI of data transmission, the conflict arbitration module determines that there is no conflict. 8.根据权利要求5、6或7所述的装置，其特征在于，所述测量退让为：只进行数据传输而不进行测量； 8. The device according to claim 5, 6 or 7, wherein the measurement compromise is: only data transmission is performed without measurement; 所述数据传输退让为：只进行测量而不进行数据传输。 The data transmission concession is: only perform measurement without data transmission.
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