CN110536336B - Common-frequency cell measuring method and device in CPC state - Google Patents

Common-frequency cell measuring method and device in CPC state Download PDF

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CN110536336B
CN110536336B CN201910831742.1A CN201910831742A CN110536336B CN 110536336 B CN110536336 B CN 110536336B CN 201910831742 A CN201910831742 A CN 201910831742A CN 110536336 B CN110536336 B CN 110536336B
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time
period
measurement
frequency cell
judgment
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CN110536336A (en
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马荃
胡昊
彭春杰
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Spreadtrum Communications Shanghai Co Ltd
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Spreadtrum Communications Shanghai Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • 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
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

A method and a device for measuring co-channel cells in a CPC state are provided, the method comprises the following steps: determining a reference time after the ith co-frequency cell measurement is started, wherein the reference time and the starting time of the ith co-frequency cell measurement are separated by a measurement period, i is a positive integer greater than or equal to 1, determining a judgment time based on the reference time, and taking the judgment time as the starting time of the (i + 1) th co-frequency cell measurement when the judgment time is in a downlink data receiving time period or an uplink data sending time period. The scheme can reduce the power consumption of the mobile terminal.

Description

Common-frequency cell measuring method and device in CPC state
The application has an application date of 2016, 03 and 25, and has the application numbers as follows: 201610178445.8, entitled: a method and device for measuring common-frequency cells in a CPC state are applied by divisional cases.
Technical Field
The invention relates to the technical field of communication, in particular to a method and a device for measuring a common-frequency cell in a CPC (cognitive pilot channel) state.
Background
In a mobile communication system, after a mobile terminal is powered on, the mobile terminal resides in a suitable serving cell through cell initial search and gradually establishes wireless communication. Meanwhile, the mobile terminal also needs to detect a cell (referred to as a "neighboring cell") adjacent to the serving cell, and perform continuous tracking measurement on the communication quality of the detected neighboring cell to prepare for cell reselection and handover. The process of detecting the neighboring cell and performing tracking measurement by the mobile terminal is called cell measurement.
For a mobile terminal residing in, for example, a WCDMA network, WCDMA intra-frequency cell measurement is required in a Continuous Packet Connectivity (CPC) state, however, when The current mobile terminal performs cell measurement according to The third Generation Partnership project (3 gpp), power consumption is high, resulting in poor user experience.
Disclosure of Invention
The invention aims to provide a method and a device for measuring a common-frequency cell in a CPC state, and reduce the power consumption of a mobile phone.
In order to solve the above technical problem, an embodiment of the present invention provides a method for measuring a common-frequency cell in a CPC state, where the method includes:
determining a reference time after the ith co-frequency cell measurement is started, wherein the reference time is separated from the starting time of the ith co-frequency cell measurement by one measurement period, and i is a positive integer greater than or equal to 1;
determining a judgment time based on the reference time;
and when the judgment time is positioned in the downlink data receiving time period or the uplink data sending time period, taking the judgment time as the starting time of the (i + 1) th co-frequency cell measurement.
Optionally, the method for measuring co-channel cells in the CPC state further includes:
and when the judgment time is positioned outside the downlink data receiving time period and outside the uplink data sending time period, after the judgment time, determining the starting time closest to the judgment time in the starting times of the downlink data receiving time period and the uplink data sending time period, and taking the determined starting time as the starting time of the (i + 1) th measurement co-frequency cell.
Optionally, the determining the judgment time based on the reference time comprises:
and taking the reference time as the judgment time.
Optionally, the determining the judgment time based on the reference time comprises: and taking the time which is a preset time period before the reference time as the judgment time.
Optionally, the value range of the preset time period is 20ms to 100ms.
The embodiment of the present invention further provides a device for measuring a common-frequency cell in a CPC state, including:
the reference time determining unit is suitable for determining a reference time after the ith co-frequency cell measurement is started, wherein the reference time and the starting time of the ith co-frequency cell measurement are separated by a measurement period, and i is a positive integer greater than or equal to 1;
a determination time determination unit adapted to determine a determination time based on the reference time;
and the starting time determining unit is suitable for taking the judging time as the starting time of the (i + 1) th co-frequency cell measurement when the judging time is positioned in the downlink data receiving time interval or the uplink data sending time interval.
Optionally, the onset time determination unit is further adapted to:
and when the judgment time is positioned outside the downlink data receiving time period and outside the uplink data sending time period, after the judgment time, determining the starting time closest to the judgment time in the starting times of the downlink data receiving time period and the uplink data sending time period, and taking the determined starting time as the starting time of the (i + 1) th measurement co-frequency cell.
Optionally, the determination time determination unit includes a first determination time determination subunit adapted to take the reference time as the determination time.
Optionally, the determination time determining unit includes a second determination time determining subunit adapted to take a time earlier than the reference time by a preset time period as the determination time.
Optionally, the preset time period is 20-100ms.
Compared with the prior art, the technical scheme of the embodiment of the invention has the following beneficial effects:
the embodiment of the invention determines the reference time after the ith co-frequency cell measurement is started, wherein the reference time and the starting time of the ith co-frequency cell measurement are separated by a measurement period, determines the judgment time based on the reference time, and takes the judgment time as the starting time of the (i + 1) th co-frequency cell measurement when the judgment time is positioned in the downlink data receiving time period or the uplink data sending time period, thereby utilizing the time for opening the antenna to send and receive data by using the mobile terminal.
Furthermore, the embodiment of the invention takes the time which is a preset time period ahead of the reference time as the judgment time, so that the time for opening the antenna to send data or receive data can be more fully utilized, and the power consumption of the mobile phone is saved.
Drawings
Fig. 1 is a flowchart of a co-channel cell measurement method in a CPC state in an embodiment of the present invention;
fig. 2 is a schematic time domain distribution diagram of a DRX cycle and a DTX cycle in the embodiment of the present invention;
FIG. 3 is a schematic time domain distribution diagram of a co-frequency measurement in an embodiment of the present invention;
fig. 4 is a flowchart of another intra-frequency cell measurement method in the CPC state in the embodiment of the present invention;
fig. 5 is a schematic structural diagram of a co-channel cell measurement apparatus in a CPC state in an embodiment of the present invention.
Detailed Description
As described above, for a mobile terminal residing in, for example, a WCDA network, WCDMA intra-frequency cell measurement is required in a Continuous Packet Connectivity (CPC) state, however, current mobile terminals consume more power when performing cell measurement according to The third Generation Partnership project (3 gpp) specification, resulting in a poor user experience.
The 3GPP only specifies the common-frequency cell measurement period in the CPC state, and no specification is provided for how to arrange the common-frequency cell measurement in the state, the embodiment of the invention determines the reference time after the ith common-frequency cell measurement is started, wherein the reference time and the initial time of the ith common-frequency cell measurement are separated by one measurement period, determines the judgment time based on the reference time, and takes the judgment time as the initial time of the (i + 1) th common-frequency cell measurement when the judgment time is positioned in the downlink data receiving period or the uplink data sending period, so that the time for opening an antenna by a mobile terminal to send and receive data can be utilized, and compared with the time for carrying out the common-frequency cell measurement in other time in the prior art, the power consumption of a mobile phone is saved.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flowchart of a co-channel cell measurement method in CPC state in an embodiment of the present invention. The method for measuring the co-channel cell in the CPC state is described below with reference to fig. 1 to 3.
Step S101: and after the ith-time co-frequency cell measurement is started, determining a reference time, wherein the reference time is separated from the starting time of the ith-time co-frequency cell measurement by one measurement period, and i is a positive integer greater than or equal to 1.
In specific implementation, the mobile terminal refers to a computer device capable of communicating in a mobile process, and includes, but is not limited to, a mobile phone, a notebook, a tablet computer, a vehicle-mounted computer, and other devices. The mobile terminal may support only one communication mode, or may support more than two communication modes. No limitation of the present invention is intended to be implied by the number of communication modes that may be supported by the mobile terminal.
For example, the mobile terminal may support a communication mode of at least one of: wireless Local Area Network (WLAN), global System For Mobile (GSM), time Division-Synchronous Code Division Multiple Access (TD-SCDMA), wideband Code Division Multiple Access (WCDMA), code Division Multiple Access (Code Division Multiple Access, CDMA), and the like. In the embodiment of the present invention, the communication mode supported by the mobile terminal is described as WCDMA.
When the mobile terminal resides in a WCDMA cell, in the CPC state, it may obtain related information of a Discontinuous Reception (DRX) cycle by receiving a system message sent by a base station, and receive data in each DRX cycle, respectively. The relevant information of the DRX period comprises information such as the length of the DRX period, the length used for receiving data in the DRX period and the like. In each DRX cycle, the mobile terminal needs to turn on an antenna to receive data.
Likewise, in the CPC state, information about Discontinuous Transmission (DTX) periods may be obtained by receiving a system message transmitted by the base station, and data may be received in each DTX period, respectively. The relevant information of the DTX cycle comprises information such as the length of the DRX cycle and the length used for receiving data in the DRX cycle. In each DTX period, the mobile terminal needs to open an antenna to transmit data.
On the other hand, the frequency point information of the cell to be measured can be obtained through the measurement message sent by the base station, and the obtained frequency point is measured, so that cell reselection or cell handover and the like can be performed subsequently.
For example, as shown in fig. 2, the number of DRX cycles of the mobile terminal in the current CPC state is N, where the length of the 1 st DRX cycle is DRX 1 The length of the 2 nd DRX period is DRX 2 … …, the length of the nth DRX cycle is DRX n … …, the length of the Nth DRX cycle is DRX N . Length DRX of nth DRX cycle n In the time period from t1 to t2, the time length of receiving the downlink data in the time period from t1 to t2 is B rn I.e., t3-t4, for a time period of B rn Also referred to herein as a downlink data reception period;
the number of DTX periods is M, wherein the 1 st DTX period is DTX 1 The length of the 2 nd DTX period is DTX 2 … …, the length of the mth DTX period is DTX m … …, the length of the Mth DRX cycle is DRX M . Length DRX of mth DRX period m Is from t a -t d Time period of (1), the time length of receiving downlink data is B tm I.e., t3-t4, for a time period of B tm Is also referred to herein as uplink data transmissionA sending time period.
As shown in fig. 3, the mobile terminal performs P measurements in the current state, wherein the time length of the first co-frequency measurement is C 1 The time length of the second same-frequency measurement is C 2 … …, the time length of the ith co-frequency measurement is C i … …, the length of time of the P-th co-frequency measurement is C P . Wherein N, P are positive integers, i is more than or equal to 1 and less than or equal to P, and N is more than or equal to 1 and less than or equal to N.
Length DRX of nth DRX cycle according to 3GPP Specification i Or DRX m Can be 4 frames, 8 frames, 16 frames or 32 frames, and correspondingly, the time length of the ith same-frequency measurement is C i And may be 1 frame, 2 frames, 4 frames, 8 frames or 12 frames. Where 1 frame equals 10ms. Specific DRX i 、DRX m And C i Is not limited as long as C i ≤DRX i And C is i ≤DTX m And (4) finishing.
In specific implementation, after the ith measurement is started, the starting time of the ith measurement can be determined, so that the reference time can be determined, wherein the reference time is separated from the starting time of the ith intra-frequency cell measurement by one measurement period.
For example, referring to fig. 3, when the starting time of the ith measurement is t5 after the ith measurement is started, the reference time is tc of one measurement period at an interval of t 5.
Step S102: determining a determination time based on the reference time.
In a specific implementation, a determination time may be determined based on the reference time, and the determination time is used to further determine a starting time of a next measurement.
In an embodiment of the present invention, the reference time may be the determination time.
Step S103: and when the judgment time is positioned in the downlink data receiving time period or the uplink data sending time period, taking the judgment time as the starting time of the (i + 1) th co-frequency cell measurement.
In a specific implementation, the downlink data receiving period is a period (DRX _ burst) during which an antenna is turned on to receive data, the uplink data transmitting period is a period (UE _ DPCCH _ burst _1 or UE _ DPCCH _ burst _ 2) during which the antenna is turned on to transmit data, and a specific type of the period may be different due to different configurations of the base station, and the type is different and is not limited by the determination here.
In an embodiment of the present invention, in the step S102, the determining a determination time based on the reference time is specifically to use the reference time as the determination time. The implementation of step S103 is described below in conjunction with fig. 3;
supposing that the ith same-frequency measurement is carried out at the time t5, specifically, taking the reference time tc of one measurement period at the time t5 as the judgment time, and when t is t c Within a downlink data reception period (DRX _ burst) t3-t4 or within an uplink data transmission period t b -t c And tc is taken as the starting time of the i +1 th measurement.
In specific implementation, the method for measuring a co-channel cell in the CPC state may further include:
and when the judgment time is positioned outside the downlink data receiving time interval and outside the uplink data sending time interval, after the judgment time, determining the starting time closest to the judgment time in the starting times of the downlink data receiving time interval and the uplink data sending time interval, and taking the determined starting time as the starting time of the (i + 1) th measurement co-frequency cell.
For example, with continued reference to FIGS. 2 and 3, when t is reached c Is not positioned in a downlink data receiving period (DRX _ burst) t3-t4 or an uplink data transmitting period t b -t c Internal time, compare t3 and t b Time of day, determining the distance t between the two c At a closer time, let t3 be, then t3 is taken as the starting time of the i +1 th measurement.
It can be understood that, when the (i + 1) th measurement is performed, the next reference time can be obtained by overlapping a measurement cycle, and the starting time of the (i + 2) th measurement can be obtained by the same method, i.e., performing step S401 to step S402 again.
It should be noted that, in the specific implementation, when the length of the DRX cycle is less than 10 subframes, the measurement cycle of the intra-frequency cell is 800ms, and when the length of the DRX cycle is greater than or equal to 10 subframes, the measurement cycle of the intra-frequency cell is 1.5s.
The embodiment of the invention determines the reference time after the ith co-frequency cell measurement is started, wherein the reference time and the starting time of the ith co-frequency cell measurement are separated by a measurement period, determines the judgment time based on the reference time, and takes the judgment time as the starting time of the (i + 1) th co-frequency cell measurement when the judgment time is positioned in the downlink data receiving time period or the uplink data sending time period, thereby simultaneously utilizing the time of opening an antenna by a mobile terminal to send data and receive data for measurement.
Fig. 4 is a flowchart of another intra-frequency cell measurement method in the CPC state in the embodiment of the present invention. The method for measuring the co-channel cell in the CPC state may include the following steps:
step S401: determining a reference time after the ith co-frequency cell measurement is started, wherein the reference time is separated from the starting time of the ith co-frequency cell measurement by one measurement period, and i is a positive integer greater than or equal to 1;
step S402: taking the moment which is advanced by the reference moment by a preset time period as the judgment moment;
step S403: when the judgment time is positioned in a downlink data receiving time period or an uplink data sending time period, taking the judgment time as the starting time of the (i + 1) th co-frequency cell measurement;
step S404: and when the judgment time is positioned outside the downlink data receiving time period and outside the uplink data sending time period, after the judgment time, determining the starting time closest to the judgment time in the starting times of the downlink data receiving time period and the uplink data sending time period, and taking the determined starting time as the starting time of the (i + 1) th measurement co-frequency cell.
Next, steps S401 to S404 will be described with reference to fig. 2 and 3.
Assuming that the ith measurement is currently performed and the starting time is t5, step S401 is performed to determine the reference time as t c If step S402 is executed, the reference time t is advanced c At a time t of a predetermined time period s c -s as the decision moment. When t is c S is located within a downlink data reception period (DRX _ burst) t3-t4 or within an uplink data transmission period t b -t c When internal, will t c S is taken as the starting moment of the i +1 th measurement. When t is c S is neither located within the downlink data reception period (DRX _ burst) t3-t4 nor located within the uplink data transmission period t b -t c Internal time, compare t3 and t b Time of day, determining the distance t between the two c At a closer time, let t3 be, then t3 is taken as the starting time of the i +1 th measurement.
An analysis of the present embodiment is carried out in conjunction with the description of fig. 2, assuming the reference time t c At a position f within the downlink data receiving period t3-t4 and closer to the time t4, when the reference time t is to be advanced c At a time t of a predetermined time period s c S (at position g) as the starting time of the i +1 th measurement, more time for opening the antenna to receive data can be utilized, and more power consumption can be saved.
In specific implementation, the value of the preset time period s ranges from 20ms to 100ms, including 20m and 100ms.
It can be understood that, when the (i + 1) th measurement is performed, the next reference time can be obtained by overlapping one measurement cycle, and the start time of the (i + 2) th measurement can be obtained by the same method, i.e., performing step S401 to step S402 again.
It should be noted that, in a specific implementation, when the length of the DRX cycle is less than 10 subframes, the measurement cycle of the intra-frequency cell is 800ms, and when the length of the DRX cycle is greater than or equal to 10 subframes, the measurement cycle of the intra-frequency cell is 1.5s.
The embodiment of the invention determines the reference time after the ith co-frequency cell measurement is started, wherein the reference time and the starting time of the ith co-frequency cell measurement are separated by a measurement period, determines the judgment time based on the reference time, and takes the judgment time as the starting time of the (i + 1) th co-frequency cell measurement when the judgment time is positioned in the downlink data receiving time period or the uplink data sending time period, thereby simultaneously utilizing the time of opening an antenna by a mobile terminal to send data and receive data for measurement.
Furthermore, the embodiment of the invention takes the time which is preset time period ahead of the reference time as the judgment time, so that the time for opening the antenna to send data or receive data can be more fully utilized, and the power consumption of the mobile phone is saved.
Fig. 5 is a schematic structural diagram of a co-channel cell measurement apparatus in a CPC state in an embodiment of the present invention. As shown in fig. 5, the intra-frequency cell measurement apparatus 50 may include: a reference time determination unit 501, a judgment time determination unit 502, and an initiation time determination unit 503. Wherein:
the reference time determining unit 501 is adapted to determine a reference time after the ith intra-frequency cell measurement is started, where the reference time is separated from the start time of the ith intra-frequency cell measurement by a measurement period, and i is a positive integer greater than or equal to 1;
the determination time determination unit 502 adapted to determine a determination time based on the reference time;
the start time determining unit 503 is adapted to use the determination time as the start time of the (i + 1) th co-channel cell measurement when the determination time is located in the downlink data receiving time period or the uplink data sending time period.
In an embodiment of the present invention, the determination time determining unit 502 may comprise a first determination time determining subunit adapted to: and taking the reference time as the judgment time.
In another embodiment of the present invention, the determination time determining unit 502 may include a second determination time determining subunit adapted to take a time earlier than the reference time by a preset time period as the determination time.
In specific implementation, the value range of the preset time period is 20ms-100ms.
In a specific implementation, the onset time determination unit 503 is further adapted to: and when the judgment time is positioned outside the downlink data receiving time period and outside the uplink data sending time period, after the judgment time, determining the starting time closest to the judgment time in the starting times of the downlink data receiving time period and the uplink data sending time period, and taking the determined starting time as the starting time of the (i + 1) th measurement co-frequency cell.
The embodiment of the invention determines the reference time after the ith co-frequency cell measurement is started, wherein the reference time and the starting time of the ith co-frequency cell measurement are separated by a measurement period, determines the judgment time based on the reference time, and takes the judgment time as the starting time of the (i + 1) th co-frequency cell measurement when the judgment time is positioned in the downlink data receiving time period or the uplink data sending time period, thereby simultaneously utilizing the time of opening an antenna by a mobile terminal to send data and receive data for measurement.
Those skilled in the art will appreciate that all or part of the steps in the methods of the above embodiments may be implemented by associated hardware instructed by a program, which may be stored in a computer-readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, and the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (2)

1. A method for measuring a common-frequency cell in a CPC state is characterized by comprising the following steps:
determining a reference time after the ith co-frequency cell measurement is started, wherein the reference time is separated from the starting time of the ith co-frequency cell measurement by one measurement period, and i is a positive integer greater than or equal to 1;
determining a judgment time based on the reference time;
when the judgment time is positioned in a downlink data receiving time period or an uplink data sending time period, taking the judgment time as the starting time of the (i + 1) th co-frequency cell measurement;
and when the judgment time is positioned outside the downlink data receiving time period and outside the uplink data sending time period, after the judgment time, determining the starting time closest to the judgment time in the starting times of the downlink data receiving time period and the uplink data sending time period, and taking the determined starting time as the starting time of the (i + 1) th measurement co-frequency cell.
2. A common-frequency cell measuring device in a CPC state is characterized by comprising:
the reference time determining unit is suitable for determining a reference time after the ith co-frequency cell measurement is started, wherein the reference time and the starting time of the ith co-frequency cell measurement are separated by a measurement period, and i is a positive integer greater than or equal to 1;
a determination time determination unit adapted to determine a determination time based on the reference time;
a starting time determining unit, adapted to use the judging time as the starting time of the (i + 1) th co-frequency cell measurement when the judging time is located in the downlink data receiving time period or the uplink data sending time period; and when the judgment time is positioned outside the downlink data receiving time period and outside the uplink data sending time period, after the judgment time, determining the starting time closest to the judgment time in the starting times of the downlink data receiving time period and the uplink data sending time period, and taking the determined starting time as the starting time of the (i + 1) th measurement co-frequency cell.
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