CN101784075A - Method for allocating measurement gap, base station and terminal - Google Patents
Method for allocating measurement gap, base station and terminal Download PDFInfo
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Abstract
The invention provides a method for allocating a measurement gap, a base station and a terminal. The base station selects one member carrier wave to allocate a measurement gap of a pilot-frequency or a different-system cell among aggregation carrier waves of a reinforced long-term-evolution (LTE-A) system, and the allocation information of the measurement gap is informed to a terminal, i.e. the base station allocates the measurement gap for a single member carrier wave, so the terminal is only required to stop the data or the signaling transmission in the measurement gap on the member carrier wave which is allocated with the measure gap, and other member carrier waves are free from being influenced, so the terminal can carry out the data and the signaling transmission on other member carrier waves so as to improve the data transmission quality and the system capacity.
Description
Technical Field
The present invention relates to mobile communication technologies, and in particular, to a method, a base station, and a terminal for configuring a measurement gap (measurementgap).
Background
In a Long Term Evolution (LTE) system and its previous wireless communication systems, one cell can only correspond to one carrier, and the maximum bandwidth of the carrier is usually 20 MHz. In a subsequently proposed enhanced long term evolution (LTE-a) system, the peak rate requirement of the system is greatly improved compared with that of the LTE system, and the system is required to reach 1Gbps downlink and 500Mbps uplink. The requirement cannot be met on 20MHz of one Carrier, so Carrier Aggregation (CA) technology is introduced in the LTE-a system, that is, a plurality of continuous or discontinuous carriers are aggregated together in one cell to serve a terminal, and the aggregated carriers are usually used as component carriers, where each component Carrier usually does not exceed 20 MHz. As shown in fig. 1, multiple (4 in the figure) component carriers may be aggregated in one LTE-a cell, and a base station and a terminal may perform data transmission on the aggregated multiple component carriers to improve system throughput.
The terminal may need to implement cell handover between inter-frequency or inter-system cells, and the system needs to configure the terminal to measure information such as channel quality of the inter-frequency cell or inter-system cell in a certain time period, which is called as a measurement gap, for example, 6ms in a cycle of every 40ms or 80ms may be configured as a measurement gap in which the terminal stops transmitting and receiving any information of an operating frequency band in the LTE system. At present, no appropriate measurement gap configuration method is provided for an LTE-a system, and if the configuration method of the LTE system is used, the terminal needs to stop data transmission work in a cell on all component carriers in the cell in the measurement gap, which has a certain influence on data transmission quality and system capacity.
Disclosure of Invention
In view of the above, the present invention provides a method, a base station and a terminal for configuring a measurement gap, so as to improve data transmission quality and system capacity.
A method of configuring a measurement gap, the method comprising:
and the base station selects one member carrier according to the carrier selection strategy in the aggregated carriers to configure the measurement gap of one different-frequency or different-system cell, and notifies the configuration information of the measurement gap to the terminal so that the terminal stops data or signaling transmission in the measurement gap on the selected member carrier.
A base station for configuring a measurement gap, the base station comprising: the device comprises a carrier selection unit, a measurement gap configuration unit and an information notification unit;
the carrier selection unit is used for selecting one member carrier for the terminal according to a carrier selection strategy in the aggregated carriers;
the measurement gap configuration unit is configured to configure a measurement gap of a different frequency or different system cell on the member carrier selected by the carrier selection unit;
the information notification unit is configured to notify the terminal of configuration information of the measurement gap.
A terminal, the terminal comprising: the device comprises an information receiving unit, a carrier determining unit and a measurement processing unit;
the information receiving unit is used for receiving configuration information of the measurement gap sent by the base station;
the carrier determining unit is configured to determine, in the aggregated carrier, a member carrier in which the base station configures a measurement gap of a different frequency or a different system cell;
the measurement processing unit is configured to stop data or signaling transmission in the measurement gap on the component carrier determined by the carrier determining unit according to the configuration information of the measurement gap received by the information receiving unit, and perform measurement on the inter-frequency or inter-system cell.
It can be seen from the above technical solutions that, in an aggregated carrier, a base station selects one of the component carriers according to a carrier selection policy to configure a measurement gap of an inter-frequency or inter-system cell, and notifies a terminal of configuration information of the measurement gap, that is, the base station configures the measurement gap for a single component carrier, so that the terminal only needs to stop data or signaling transmission in the measurement gap on the component carrier configured with the measurement gap, and does not affect other component carriers, and the terminal can also perform data and signaling transmission on other component carriers, thereby improving data transmission quality and system capacity.
Drawings
Fig. 1 is a schematic diagram of aggregated carriers in an LTE-a system;
FIG. 2 is a flow chart of configuring a measurement gap according to an embodiment of the present invention;
FIG. 3 is a flowchart of configuring a measurement gap according to a second embodiment of the present invention;
fig. 4a is a schematic diagram of a first case where a carrier frequency of an inter-frequency or inter-system cell is not within an operating frequency of an aggregated carrier of an LTE-a system according to an embodiment of the present invention;
fig. 4b is a schematic diagram of a second case where the carrier frequency of the inter-frequency or inter-system cell is not within the operating frequency of the aggregated carrier of the LTE-a system according to the embodiment of the present invention;
fig. 5 is a structural diagram of a base station according to an embodiment of the present invention;
fig. 6 is a diagram of a terminal structure according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The method provided by the invention mainly comprises the following steps: the base station selects one member carrier from the aggregated carriers to configure a measurement gap of an inter-frequency or inter-system cell, and notifies the configuration information of the measurement gap to the terminal, so that the terminal stops data or signaling transmission in the measurement gap on the selected member carrier.
The method is mainly applied to an LTE-A system and can also be applied to other systems adopting a carrier aggregation technology.
When the terminal has a plurality of different-frequency or different-system cells which need to be measured, the terminal can respectively select member carriers to configure measurement gap according to the plurality of different-frequency or different-system cells which need to be measured, the selected member carriers can be one or more, namely, the plurality of different-frequency or different-system cells can commonly use one member carrier, and the plurality of different-frequency or different-system cells can respectively use different member carriers. Usually, the measurement gaps corresponding to a plurality of inter-frequency or inter-system cells are staggered in time as much as possible, so as to ensure that the number of component carriers in which the measurement gaps occur at the same time is minimum.
The base station may notify the terminal of the selected component carrier information and the configuration information of the measurement gap on the component carrier; or only the configuration information of the measurement gap may be notified to the terminal, and the terminal and the base station select the component carrier where the measurement gap is located by using the same selection policy.
Under an aggregation carrier mechanism of an LTE-A system, a plurality of receivers are used for a discontinuous member carrier terminal, and each receiver corresponds to one member carrier and works independently; for contiguous component carriers, only one wideband receiver may be used, whose reception bandwidth covers the frequency bands of all component carriers. The above method is described in detail below with respect to different receiver types, respectively, in a few embodiments.
Embodiment one, in an aggregated carrier of an LTE-a system, a terminal has an independent receiver for each component carrier.
Fig. 2 is a flowchart of configuring a measurement gap according to an embodiment of the present invention, as shown in fig. 2, which may include the following steps:
step 201: the base station determines the carrier frequency of the pilot frequency or the inter-system cell to be measured, and selects the member carrier corresponding to the receiver with the receiving bandwidth covering the carrier frequency.
Step 202: and judging whether the selected member carrier is one, if not, executing the step 203, and if so, executing the step 204.
Step 203: and selecting a component carrier with the minimum data transmission quantity.
The flow from step 201 to step 203 is a process for selecting a measurement gap for the base station, that is, the selection strategy adopted by the base station when selecting the member carrier may be: and according to the measured carrier frequency of the pilot frequency or the inter-system cell, selecting a member carrier corresponding to a receiver with a receiving bandwidth covering the carrier frequency to configure the measurement gap of the pilot frequency or the inter-system cell. If a plurality of receivers with receiving bandwidths covering the carrier frequency exist, one of the receivers can be selected, or the lowest numbered one of the component carriers is selected, or the lowest frequency of the component carriers is selected, or the lowest bandwidth of the component carriers is selected, or the lowest data transmission quantity of the component carriers is selected, and the like.
Step 204: and the base station configures the measurement gap on the selected component carrier.
Step 205: and judging whether other pilot frequency or inter-system cells needing to be measured exist, if not, executing step 206, and if so, executing step 201.
If the terminal only has one inter-frequency or inter-system cell to be measured, the base station configures the measurement gap on the member carrier after selecting the member carrier, and notifies the configuration information of the measurement gap to the terminal.
When there are multiple pilot frequencies or different system cells to be measured, the base station may select component carriers for each pilot frequency or different system cell one by one according to the selection policy, configure measurement gap for different pilot frequencies or different system cells on each selected component carrier, and notify the terminal of the configuration information of the measurement gap of each pilot frequency or different system cell. In the process, the measurement gap on a plurality of component carriers is staggered in time as much as possible, and the minimum number of component carriers with the measurement gap appearing at the same time is ensured.
Step 206: the base station informs the terminal of configuration information of the measurement gap through RRC signaling.
In this step, the base station may notify the terminal of the configuration information of the measurement gap in an RRC signaling manner.
Further, the base station may notify all terminals of the carrier selection policy for configuring the measurement gap in a broadcast manner and in an RRC signaling manner before notifying the terminals of the configuration information of the measurement gap. Or the base station and the terminal adopt a uniform carrier selection strategy according to a preset protocol, the base station and the terminal respectively determine the member carrier for configuring the measurement gap through the carrier selection strategy, and the base station only informs the terminal of the configuration information of the measurement gap.
If only the configuration information of the measurement gap is notified to the terminal, the terminal selects the component carrier where the measurement gap is located according to the same selection strategy as the base station. In addition, if the base station and the terminal do not unify the carrier selection policy in advance, the base station may also notify the terminal of the selected component carrier information together with the configuration information of the measurement gap on the component carrier. The configuration information of the measurement gap may include: the length, period, time of gap and the targeted inter-frequency or inter-system cell identity are measured.
The terminal may stop data and signaling transmission only in the measurement gap of the selected component carrier, measure the inter-frequency cell or the system cell according to the configuration of the measurement gap on the component carrier, and continue data and signaling transmission in other component carriers. That is, the measurement gap affects only the data and signaling transmission of the component carrier in which it is located. That is, the receiver corresponding to the selected component carrier stops data and signaling transmission in the measurement gap, and the receivers corresponding to other component carriers can transmit data and signaling all the time.
In the second embodiment, in the aggregated carrier of the LTE-a system, the terminal uses the same wideband receiver for all the component carriers, and the carrier frequency of the inter-frequency or inter-system cell to be measured is within the operating frequency of the aggregated carrier of the LTE-a system.
Fig. 3 is a flowchart of configuring a measurement gap according to a second embodiment of the present invention, as shown in fig. 3, which may include the following steps:
step 301: the base station selects a member carrier with the minimum data transmission quantity from the aggregation carriers of the LTE-A system.
In this embodiment, since the terminal has only one wideband receiver, the strategy for selecting the component carrier by the base station is different from the embodiment, and in addition to selecting one component carrier with the smallest data transmission amount from the aggregated carriers, the component carrier with the smallest bandwidth, or the component carrier with the worst channel quality for the terminal, or one component carrier may be selected arbitrarily.
Step 302: and the base station configures the measurement gap of the different frequency or different system cell to be measured on the selected component carrier.
Step 303: and judging whether other pilot frequency or inter-system cells needing to be measured exist, if not, executing step 304, and if so, executing step 301.
Similarly, if the terminal has only one inter-frequency or inter-system cell to be measured, the base station performs configuration of the measurement gap on the component carrier after selecting the component carrier, and notifies the terminal of the configuration information of the measurement gap.
When there are multiple pilot frequencies or inter-system cells to be measured, the base station may select component carriers for each pilot frequency or inter-system cell one by one according to the selection policy, configure measurement gap for different pilot frequencies or inter-system cells on each selected component carrier, and notify the terminal of the configuration information of the measurement gap of each pilot frequency or inter-system cell. In the process, the measurement gap on a plurality of component carriers is staggered in time as much as possible, and the minimum number of component carriers with the measurement gap appearing at the same time is ensured.
Step 304: the base station informs the terminal of configuration information of the measurement gap by RRC signaling.
In this step, the base station may notify the terminal of the configuration information of the measurement gap in an RRC signaling manner.
Further, the base station may notify all terminals of the carrier selection policy for configuring the measurement gap in a broadcast manner and in an RRC signaling manner before notifying the terminals of the configuration information of the measurement gap. Or the base station and the terminal adopt a uniform carrier selection strategy according to a preset protocol, the base station and the terminal respectively determine the member carrier for configuring the measurement gap through the carrier selection strategy, and the base station only informs the configuration information of the measurement gap to the terminal.
If only the configuration information of the measurement gap is notified to the terminal, the terminal selects the component carrier where the measurement gap is located according to the same selection strategy as the base station. In addition, if the base station and the terminal do not unify the carrier selection policy in advance, the base station may also notify the terminal of the selected component carrier information together with the configuration information of the measurement gap on the component carrier. The configuration information of the measurement gap may include: the length, period, time of gap and the targeted inter-frequency or inter-system cell identity are measured.
The terminal may stop data and signaling transmission only in the measurement gap of the selected component carrier, measure the inter-frequency cell or the system cell according to the configuration of the measurement gap on the component carrier, and continue data and signaling transmission in other component carriers. That is, the measurement gap affects only the data and signaling transmission of the component carrier in which it is located.
In the third embodiment, in the aggregated carrier of the LTE-a system, the terminal uses the same wideband receiver for all the component carriers, and the carrier frequency of the inter-frequency or inter-system cell to be measured is not within the operating frequency of the aggregated carrier of the LTE-a system.
The following two cases still exist in this example:
in the first case: the carrier frequency of the inter-frequency or inter-system cell to be measured and all component carriers of the LTE-a system cannot be within the reception bandwidth of the broadband receiver at the same time. As shown in fig. 4a, assuming that the receiving bandwidth of the receiver is 100MHz, two component carriers exist in the LTE-a system: the component carrier 1 with the center frequency of f1 and the component carrier 2 with the center frequency of f1+80MHz, and the carrier frequency of the different-frequency or different-system cell is f1-100 MHz. At this time, after configuring the measurement gap for the terminal, the terminal cannot operate within the operating frequency of the local cell of the LET-a system as long as the measurement gap is entered, which is the same as the case of the LTE system.
In the second case: after the center frequency of the broadband receiver is adjusted, the carrier frequency of the pilot frequency or the inter-system cell to be measured and part of the component carriers can be simultaneously in the receiving bandwidth of the broadband receiver. As shown in fig. 4b, assuming that the receiving bandwidth of the receiver is 100MHz, two component carriers exist in the LTE-a system: the component carrier 1 with the center frequency of f1 and the component carrier 2 with the center frequency of f1+80MHz, and the carrier frequency of the different-frequency or different-system cell is f1+100 MHz.
If the center frequency of the broadband receiver is not allowed to be adjusted, after the terminal is configured with the measurement gap, the terminal cannot transmit the data of the cell of the LTE-a system as long as the measurement gap is entered, which is the same as the case of the LTE system.
If the adjustment of the center frequency of the broadband receiver is allowed, a component carrier within the reception bandwidth of the broadband receiver after the adjustment of the center frequency, which cannot be simultaneously with the carrier frequency of the inter-frequency or inter-system cell to be measured, may be selected, a measurement gap may be configured on the selected component carrier, and if there are a plurality of selected component carriers, one of the selected component carriers may be optionally configured with the measurement gap. That is, a component carrier that cannot be within the reception bandwidth of the bandwidth receiver at the same time as the pilot frequency or the carrier frequency of the inter-system cell to be measured even if the center frequency of the receiver is adjusted is selected, and the measurement gap is configured on the component carrier.
Similarly, if the terminal has only one inter-frequency or inter-system cell to be measured, the base station performs configuration of the measurement gap on the component carrier after selecting the component carrier, and notifies the terminal of the configuration information of the measurement gap.
When there are multiple pilot frequencies or inter-system cells to be measured, the base station may select component carriers for each pilot frequency or inter-system cell one by one according to the selection policy, configure measurement gap for different pilot frequencies or inter-system cells on each selected component carrier, and notify the terminal of the configuration information of the measurement gap of each pilot frequency or inter-system cell. In the process, the measurement gap on a plurality of component carriers is staggered in time as much as possible, and the minimum number of component carriers with the measurement gap appearing at the same time is ensured.
The base station may notify the terminal of configuration information of the measurement gap in an RRC signaling manner.
Further, the base station may notify all terminals of the carrier selection policy for configuring the measurement gap in a broadcast manner and in an RRC signaling manner before notifying the terminals of the configuration information of the measurement gap. Or the base station and the terminal adopt a uniform carrier selection strategy according to a preset protocol, the base station and the terminal respectively determine the member carrier for configuring the measurement gap through the carrier selection strategy, and the base station only informs the configuration information of the measurement gap to the terminal.
And if the terminal is only informed of the configuration information of the measurement gap, the terminal selects the member carrier where the measurement gap is located according to the same carrier selection strategy as the base station. In addition, if the base station and the terminal do not unify the carrier selection policy in advance, the base station may also notify the terminal of the selected component carrier information together with the configuration information of the measurement gap on the component carrier. The configuration information of the measurement gap may include: the length, period, time of gap and the targeted inter-frequency or inter-system cell identity are measured.
The terminal may stop data and signaling transmission only in the measurement gap of the selected component carrier, measure the inter-frequency cell or the system cell according to the configuration of the measurement gap on the component carrier, and continue data and signaling transmission in other component carriers. That is, the measurement gap affects only the data and signaling transmission of the component carrier in which it is located.
The above is a detailed description of the method provided by the present invention, and the following is a detailed description of the base station and the terminal provided by the present invention.
Fig. 5 is a structural diagram of a base station according to an embodiment of the present invention, and as shown in fig. 5, the base station may include: carrier selection section 501, measurement gap configuration section 502, and information notification section 503.
A carrier selecting unit 501, configured to select one of the component carriers for the terminal according to a carrier selection policy in an aggregated carrier of an LTE-a system.
A measurement gap configuration unit 502, configured to configure a measurement gap of an inter-frequency or inter-system cell on the component carrier selected by the carrier selection unit 501.
An information notifying unit 503, configured to notify the terminal of the configuration information of the measurement gap.
If the terminal has an independent receiver for each component carrier in the aggregated carrier of the LTE-a system, the carrier selection unit 501 may select one component carrier of the component carriers corresponding to the receiver whose reception bandwidth covers the carrier frequency according to the carrier frequency of the inter-frequency or inter-system cell to be measured.
If the terminal uses the same receiver for all component carriers in the aggregated carrier of the LTE-a system and the carrier frequency of the inter-frequency or inter-system cell to be measured is within the reception bandwidth of the receiver, the carrier selection unit 501 may select a component carrier arbitrarily from the aggregated carrier, or select a component carrier with the minimum data transmission amount, or select a component carrier with the minimum bandwidth, or select a component carrier with the worst channel quality for the terminal.
If the terminal uses the same receiver for all the component carriers in the aggregated carrier of the LTE-a system and the carrier frequency of the inter-frequency or inter-system cell to be measured is not within the reception bandwidth of the receiver, the carrier selection unit 501 may select the component carrier that cannot be simultaneously within the reception bandwidth of the broadband receiver with the carrier frequency of the inter-frequency or inter-system cell to be measured after adjusting the center frequency of the broadband receiver, and configure the measurement gap on the component carrier.
When there are a plurality of inter-frequency or inter-system cells to be measured, the base station may further include: a determining unit 504, configured to determine whether there are other inter-frequency or inter-system cells to be measured after the measurement gap configuring unit 502 performs the configuration operation, and if so, notify the carrier selecting unit 501 to continue to select the component carrier for the other inter-frequency or inter-system cells to be measured; if not, the configuration information of the measurement gap is supplied to the information notifying unit 503.
In this case, if there are a plurality of inter-frequency or inter-system cells to be measured, measurement gap configuration section 502 may be further configured to shift the time for measuring gap on each component carrier so as to minimize the number of component carriers on which measurement gap occurs simultaneously when the measurement gap is configured on the component carrier selected for each inter-frequency or inter-system cell.
In addition, the information notification unit 503 may also be configured to notify the terminal of the selected component carrier information while notifying the terminal of the configuration information of the measurement gap.
The manner for the information notification unit 503 to notify the terminal of the configuration information of the measurement gap may be: the notification to the terminal is by RRC signaling.
In addition, the information notifying unit 503 may also notify all terminals of the carrier selection policy used for configuring the measurement gap in a broadcast manner or in an RRC signaling manner before notifying the terminals of the configuration information of the measurement gap. Or the base station and the terminal adopt a uniform carrier selection strategy according to a preset protocol.
Fig. 6 is a structure diagram of a terminal according to an embodiment of the present invention, and as shown in fig. 6, the terminal may include: information receiving section 601, carrier determining section 602, and measurement processing section 603.
An information receiving unit 601, configured to receive configuration information of the measurement gap sent by the base station.
A carrier determining unit 602, configured to determine, in an aggregated carrier of an LTE-a system, a component carrier in which a base station configures a measurement gap of an inter-frequency or inter-system cell.
A measurement processing unit 603, configured to stop data or signaling transmission in the measurement gap on the component carrier determined by the carrier determining unit 602 according to the configuration information of the measurement gap received by the information receiving unit 601, and perform measurement of the inter-frequency or inter-system cell.
The carrier determining unit 602 may determine, according to the carrier selection policy, a component carrier of a measurement gap configured by the base station for one inter-frequency or inter-system cell.
Alternatively, the information receiving unit 601 may be further configured to receive component carrier information selected for an inter-frequency or inter-system cell; at this time, the carrier determining unit 602 may determine, according to the component carrier information received by the information receiving unit, a component carrier of the base station configured with a measurement gap of an inter-frequency or inter-system cell.
Specifically, if the terminal has an independent receiver for each component carrier in the aggregated carrier of the LTE-a system, the carrier determining unit 602 may select one of the component carriers corresponding to the receiver whose reception bandwidth covers the carrier frequency according to the carrier frequency of the inter-frequency or inter-system cell to be measured. In this case, the receiver corresponding to the component carrier stops data or signaling transmission in the measurement gap, performs measurement of the inter-frequency or inter-system cell, and is affected by other receivers.
If the terminal uses the same receiver for all component carriers in the aggregated carrier of the LTE-a system and the carrier frequency of the inter-frequency or inter-system cell to be measured is within the reception bandwidth of the receiver, the carrier determining unit 602 may select a component carrier from the aggregated carrier at will, or select a component carrier with the minimum data transmission amount, or select a component carrier with the minimum bandwidth, or select a component carrier with the worst channel quality for the terminal.
If the terminal uses the same receiver for all the component carriers in the aggregated carrier of the LTE-a system and the carrier frequency of the inter-frequency or inter-system cell to be measured is not within the receiving bandwidth of the receiver, the carrier determining unit 602 may select the component carrier that cannot be simultaneously within the receiving bandwidth of the broadband receiver with the carrier frequency of the inter-frequency or inter-system cell to be measured after adjusting the center frequency of the broadband receiver, and configure the measurement gap on the component carrier.
As can be seen from the above description, in an aggregated carrier of an LTE-a system, a base station selects one of component carriers according to a carrier selection policy to configure a measurement gap of an inter-frequency or inter-system cell, and notifies a terminal of configuration information of the measurement gap, that is, the base station configures the measurement gap for a single component carrier, so that the terminal only needs to stop data or signaling transmission in the measurement gap on the component carrier configured with the measurement gap, and does not affect other component carriers, and the terminal can also perform data and signaling transmission on other component carriers, thereby improving data transmission quality and system capacity.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (20)
1. A method of configuring a measurement gap (gap), the method comprising:
and the base station selects one member carrier according to the carrier selection strategy in the aggregated carriers to configure the measurement gap of one different-frequency or different-system cell, and notifies the configuration information of the measurement gap to the terminal so that the terminal stops data or signaling transmission in the measurement gap on the selected member carrier.
2. The method according to claim 1, wherein if the terminal has an independent receiver for each component carrier in the aggregated carriers of the LTE-a system, the carrier selection policy specifically comprises: and the base station selects one member carrier from member carriers corresponding to a receiver with the receiving bandwidth covering the carrier frequency according to the carrier frequency of the different frequency or different system cells to be measured.
3. The method according to claim 2, wherein when there are multiple component carriers corresponding to the receiver whose selected receiving bandwidth covers the carrier frequency, one of the component carriers is arbitrarily selected to configure the measurement gap, or the component carrier with the smallest number is selected to configure the measurement gap, or the component carrier with the lowest frequency is selected to configure the measurement gap, or the component carrier with the smallest data transmission amount is selected to configure the measurement gap.
4. The method according to claim 1, wherein if the terminal uses the same receiver for all component carriers in the aggregated carrier of the LTE-a system and the carrier frequency of the inter-frequency or inter-system cell to be measured is within the reception bandwidth of the receiver, the carrier selection policy specifically comprises: and the base station randomly selects a member carrier from the aggregation carriers, or selects a member carrier with the minimum data transmission quantity, or selects a member carrier with the minimum bandwidth, or selects a member carrier with the worst channel quality for the terminal.
5. The method according to claim 1, wherein if the terminal uses the same receiver for all component carriers in the aggregated carrier of the LTE-a system and the carrier frequency of the inter-frequency or inter-system cell to be measured is not within the reception bandwidth of the receiver, the carrier selection policy specifically comprises: and selecting a component carrier which cannot be simultaneously within the receiving bandwidth of the broadband receiver with the carrier frequency of the pilot frequency or the inter-system cell to be measured even if the receiver center frequency is adjusted, and configuring the measurement gap on the component carrier.
6. The method according to any of claims 1 to 5, wherein if there are multiple measured inter-frequency or inter-system cells, the base station performs the step of selecting one of the component carriers to configure the measurement gap of one inter-frequency or inter-system cell for each inter-frequency or inter-system cell to be measured, respectively.
7. The method of claim 6, wherein if there are multiple inter-frequency or inter-system cells to measure, the number of component carriers where measurement gap occurs simultaneously is minimized when the measurement gap is configured on the component carrier selected for each inter-frequency or inter-system cell.
8. The method according to any one of claims 1 to 5, wherein the terminal selects a component carrier according to the carrier selection policy after receiving the configuration information of the measurement gap, stops transmission of data and signaling in the measurement gap on the selected component carrier according to the received configuration information of the measurement gap, and measures an inter-frequency or inter-system cell specified by the configuration information of the measurement gap; or,
and the base station notifies the terminal of the configuration information of the measurement gap and notifies the terminal of the selected member carrier information, and the terminal stops the transmission of data and signaling in the measurement gap on the selected member carrier according to the received configuration information of the measurement gap and the selected member carrier information and measures the different-frequency or different-system cell appointed by the configuration information of the measurement gap.
9. The method of claim 1, wherein the notifying the terminal of the configuration information of the measurement gap is performed by: and informing the terminal through Radio Resource Control (RRC) signaling.
10. The method of claim 1 or 9, further comprising: the base station informs the terminal of the carrier selection strategy information in a broadcasting or RRC signaling mode; or,
and the base station and the terminal adopt a uniform carrier selection strategy according to a preset protocol.
11. A base station for configuring a measurement gap, the base station comprising: the device comprises a carrier selection unit, a measurement gap configuration unit and an information notification unit;
the carrier selection unit is used for selecting one member carrier for the terminal according to a carrier selection strategy in the aggregated carriers;
the measurement gap configuration unit is configured to configure a measurement gap of a different frequency or different system cell on the member carrier selected by the carrier selection unit;
the information notification unit is configured to notify the terminal of configuration information of the measurement gap.
12. The base station of claim 11, wherein if the terminal has an independent receiver for each component carrier in the aggregated carriers of the LTE-a system, the carrier selection unit selects one component carrier of the component carriers corresponding to the receiver whose reception bandwidth covers the carrier frequency according to the carrier frequency of the inter-frequency or inter-system cell to be measured; or,
if the terminal uses the same receiver for all member carriers in the aggregated carrier of the LTE-a system and the carrier frequency of the inter-frequency or inter-system cell to be measured is within the reception bandwidth of the receiver, the carrier selection unit selects a member carrier arbitrarily from the aggregated carrier, or selects a member carrier with the minimum data transmission amount, or selects a member carrier with the minimum bandwidth, or selects a member carrier with the worst channel quality for the terminal; or,
if the terminal uses the same receiver for all member carriers in the aggregated carrier of the LTE-A system and the carrier frequency of the pilot frequency or the inter-system cell to be measured is not within the receiving bandwidth of the receiver, the carrier selection unit selects the member carrier which cannot be simultaneously within the receiving bandwidth of the broadband receiver with the carrier frequency of the pilot frequency or the inter-system cell to be measured even if the center frequency of the receiver is adjusted, and configures the measurement gap on the member carrier.
13. A base station according to claim 11 or 12, characterized in that the base station further comprises: a determining unit, configured to determine whether there are other inter-frequency or inter-system cells to be measured after the measurement gap configuration unit performs the configuration operation, and if so, notify the carrier selecting unit to continue to select a component carrier for the other inter-frequency or inter-system cells to be measured; if not, the configuration information of the measurement gap is provided to the information notification unit.
14. The base station of claim 13, wherein the measurement gap configuration unit is further configured to minimize the number of component carriers in which measurement gaps occur simultaneously when configuring measurement gaps on the component carriers selected for each inter-frequency or inter-system cell if there are multiple inter-frequency or inter-system cells for measurement.
15. The base station according to claim 11 or 12, wherein the information notifying unit is configured to notify the terminal of the configuration information of the measurement gap and to notify the terminal of the selected component carrier information.
16. The base station according to claim 11 or 12, wherein the information notifying unit broadcasts the carrier selection policy information configuring the measurement gap to all terminals or notifies the terminals through RRC signaling.
17. The base station according to claim 11 or 12, wherein the information notifying unit notifies the terminal of configuration information of the measurement gap by RRC signaling.
18. A terminal, characterized in that the terminal comprises: the device comprises an information receiving unit, a carrier determining unit and a measurement processing unit;
the information receiving unit is used for receiving configuration information of the measurement gap sent by the base station;
the carrier determining unit is configured to determine, in the aggregated carrier, a member carrier in which the base station configures a measurement gap of a different frequency or a different system cell;
the measurement processing unit is configured to stop data or signaling transmission in the measurement gap on the component carrier determined by the carrier determining unit according to the configuration information of the measurement gap received by the information receiving unit, and perform measurement on the inter-frequency or inter-system cell.
19. The terminal of claim 18, wherein the carrier determining unit determines component carriers of measurement gap for which the base station configures an inter-frequency or inter-system cell according to a carrier selection policy; or,
the information receiving unit is further configured to receive member carrier information selected for the inter-frequency or inter-system cell; and the carrier determining unit determines the member carrier of the base station configured with the measurement gap of the different frequency or different system cell according to the member carrier information received by the information receiving unit.
20. The terminal of claim 19, wherein if the terminal has an independent receiver for each component carrier in the aggregated carriers of the LTE-a system, the carrier determining unit selects one component carrier of the component carriers corresponding to the receiver whose reception bandwidth covers the carrier frequency according to the carrier frequency of the inter-frequency or inter-system cell to be measured; or,
if the terminal uses the same receiver for all member carriers in an aggregated carrier of an LTE-A system and the carrier frequency of an inter-frequency or inter-system cell to be measured is within the receiving bandwidth of the receiver, the carrier determining unit selects a member carrier from the aggregated carrier at will, or selects a member carrier with the minimum data transmission quantity, or selects a member carrier with the minimum bandwidth, or selects a member carrier with the worst channel quality for the terminal; or,
if the terminal uses the same receiver for all member carriers in the aggregated carrier of the LTE-A system and the carrier frequency of the pilot frequency or the inter-system cell to be measured is not within the receiving bandwidth of the receiver, the carrier determining unit selects the member carrier which cannot be simultaneously within the receiving bandwidth of the broadband receiver with the carrier frequency of the pilot frequency or the inter-system cell to be measured even if the center frequency of the receiver is adjusted, and configures the measurement gap on the member carrier.
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