CN102387525A

CN102387525A - Carrier wave configuring method, device and system

Info

Publication number: CN102387525A
Application number: CN2010102665567A
Authority: CN
Inventors: 雷蕾; 王军; 高有军; 胡臻平
Original assignee: China Mobile Communications Group Co Ltd
Current assignee: China Mobile Communications Group Co Ltd
Priority date: 2010-08-27
Filing date: 2010-08-27
Publication date: 2012-03-21
Anticipated expiration: 2030-08-27
Also published as: CN102387525B

Abstract

The invention discloses a carrier wave configuring method, a device and a system. The carrier wave configuring method comprises the following steps: determining whether a carrier wave can be used or not by a first base station according to the measuring result of the quality of a channel on the carrier wave needing to be configured at a local first terminal; when the carrier wave can be used, transmitting a resource using request to an adjacent base station which is already configured with the carrier wave; configuring a local second terminal of the adjacent base station by the adjacent base station according to the resource using request, measuring the quality of the channel if the first base station is configured with the carrier wave, determining whether the condition that the carrier wave is used by the first base station is accepted or not according to the measuring result reported by the second terminal and also transmitting corresponding feedback information to the first base station; and determining whether the carrier wave is used or not by the first base station according to the received feedback information of the adjacent base station. According to the carrier wave configuring method, the device and the system, which are disclosed by the invention, the influence to a terminal in an adjacent subdistrict is kept within a certain threshold by adding a new carrier wave, and the terminal in the adjacent subdistrict can be in normal working under the condition of keeping a certain quality of the channel.

Description

Carrier configuration method, device and system

Technical Field

The present invention relates to wireless technologies, and in particular, to a method, an apparatus, and a system for configuring a carrier.

Background

Femtocell is called Femtocell (also called Femtocell), is a small-sized and low-power cellular base station, is mainly used in indoor places such as home and office, and is also called home base station. It is used as a supplement to the indoor coverage of cellular networks to provide voice and data services to users. The problem of interference between femtocells is one of the key issues that its actual deployment must address.

The demand for high data rates for wireless communication systems continues to grow. In 3GPP, LTE-a systems as an LTE evolution release will support a larger bandwidth (100 MHz maximum) than LTE Rel-8. The carrier aggregation is used by aggregating a plurality of existing LTE carriers together, so that the requirement of an LTE-A system for larger bandwidth is met.

In a carrier aggregation system, interference coordination may be performed by having Femto cells that interfere with each other use different carriers. For each Femto cell, all available carriers are divided into two categories: configured carriers and unconfigured carriers. A Femto base station may transmit data and control information on its configured carrier and may not transmit any information on an unconfigured carrier. Therefore, each Femto cell should try to avoid using the configured carrier of the neighbor Femto cell as the configured carrier of the cell, thereby avoiding unnecessary interference.

The unconfigured carrier may be changed into the configured carrier through the RRC _ reconfiguration procedure. The configuration carriers are further divided into a master carrier and a slave carrier. There is one and only one master carrier, and there may be zero, one or more slave carriers. When a Femto base station is started, a carrier is selected as a main carrier, and then which carriers are configured as slave carriers are determined. As for the current 3GPP discussion, the base station determines whether to configure an unconfigured carrier as a secondary carrier, and may consider the following events for triggering the UE to perform measurement reporting in addition to the service requirement of the cell:

event A3: when the UE measures that the RSRP or the RSRQ is greater than or equal to the configured carrier on a certain unconfigured carrier, the UE reports the corresponding RSRP or the RSRQ to the base station.

Event A4: when the UE measures that the RSRP or the RSRQ is greater than or equal to a threshold value on a certain unconfigured carrier, the UE reports the corresponding RSRP or the RSRQ to the base station.

According to the measurement reporting event, whether an unconfigured carrier is configured as a slave carrier is determined, and although the carrier can be ensured to have acceptable channel quality in the cell, the carrier may generate large interference on the carrier by a neighbor cell, so that the neighbor cell cannot normally use the carrier.

As shown in fig. 1, assuming that carrier 2 has been configured as the primary carrier by Femto cell 2, and if Femto cell 1 configures carrier 2 as its secondary carrier, the Signal to Interference plus Noise Ratio (SINR) on carrier 2 of user terminal HUE1 of Femto cell 1 is:

and the signal-to-interference ratio (SINR) of user terminal HUE2 of Femto cell 2 on carrier 2 is:

it can be seen that the signal-to-interference ratios on carrier 2 for HUE1 and HUE2 are not the same, but depend on their respective distances to the serving and interfering base stations. If Femto cell 1 only considers the channel quality of the user terminal HUE1 of this cell on carrier 2 when deciding whether to configure carrier 2 as its slave carrier, it may cause the channel quality of HUE2 on carrier 2 to become unacceptable, thereby affecting the normal operation of Femto cell 2.

Disclosure of Invention

The invention aims to provide a carrier configuration method, a carrier configuration device and a carrier configuration system, so that a terminal of an adjacent cell can normally work after a new carrier is added.

To achieve the above object, according to an aspect of the present invention, there is provided a carrier configuration method, including:

A. the first base station determines whether the carrier can be used according to the measurement result of the channel quality of the local first terminal on the carrier to be configured, and when the carrier can be used, the first base station sends a resource use request to a neighbor base station configured with the carrier;

B. the neighbor base station configures a local second terminal thereof according to the resource use request to measure the channel quality after the carrier is configured by the first base station, determines whether the first base station agrees to use the carrier according to a measurement result reported by the second terminal, and sends corresponding feedback information to the first base station;

C. and the first base station determines whether to use the carrier wave according to the received feedback information of the neighbor base station.

In step a, the operation of the first base station determining whether the carrier can be used according to the measurement result of the channel quality of the local first terminal on the carrier to be configured includes:

a01, the first base station configures all or part of local first terminals to measure a first SINR value on a carrier to be configured;

a02, when a first SINR value measured by the first terminal is greater than or equal to a preset first threshold, the first terminal reporting the first trigger information to a first base station to which the first terminal belongs;

a03, the first base station determines whether the carrier can be used according to all or part of the received first trigger information.

The step a01 specifically includes:

the first terminal measures the RSRP of the local base station and the neighbor base station on the carrier wave;

the first terminal measures the RSRP of the local base station and the neighbor base station on the carrier, calculates a first SINR value of the first terminal on the carrier according to the following formula,

wherein,

for the RSRP of the first terminal to the first base station,

as the first terminal to neighbor base station RSRP, Ψ_iIs the set of neighbor base stations of the first base station, and N is the noise power.

Wherein the first trigger information includes the first SINR value and/or RSRP.

The step B specifically comprises the following steps:

after receiving the resource use request, the neighbor base station configures all or part of second terminals in the neighbor base station to measure a second SINR value after the first base station configures the carrier;

when the second SINR value is larger than or equal to a preset second threshold value, the second terminal reports the second trigger information to the neighbor base station to which the second trigger information belongs;

and when the neighbor base station receives all or part of the second trigger information, determining whether the first base station agrees to use the carrier.

In step a, the first base station sends a resource use request including a number of a carrier requesting configuration to the neighbor base station configured with the carrier.

In step a, the first base station receives first trigger information including the first SINR value reported by the first terminal, and calculates a first utility value U of the first base station on the carrier to be configured according to the following formula_i，k，

Wherein r is_i，kIf the first base station uses the carrier k to be configured, the throughput is increased, that is, the data rate of the first base station on the carrier k

Wherein

The SINR value of the carrier k to be configured is the first base station; r_iIs the total throughput when the first base station is not using carrier k; n is the number of other base stations which are currently using the carrier k and have interference relation with the first base station;

the first base station sends a resource use request containing the first utility value to a neighbor base station configured with the carrier.

The step B further comprises the following steps: the second terminal reports second trigger information containing a second SINR value to the neighbor base station to which the second terminal belongs;

the neighbor base station further calculates a second utility value U of the neighbor base station on the carrier wave according to the following formula_j，k，

U_{j, k} = \frac{r_{j, k}}{R_{j}},

Wherein r is_j，kAllowing the first base station to use the reduced throughput after carrier k for the neighbor base stations,

wherein

For the SINR value of the neighbor base station at carrier k when the first base station is not using carrier k,

if the first base station uses a carrier k, the SINR value of the neighbor base station on the carrier k; r_jTotal throughput when the first base station is not allowed to use carrier k for the neighbor base stations;

when the second utility value U is_j，kGreater than or equal to a first utility value U in the resource use request sent by the first base station_i，kIf yes, the neighbor base station agrees that the first base station uses the carrier k, otherwise, the first base station is refused to use the carrier k;

and the neighbor base station generates corresponding feedback information and sends the feedback information to the first base station.

To achieve the above object, according to another aspect of the present invention, there is provided a terminal including: a first configuration module, configured to configure all or part of local terminals to measure a first channel quality on a carrier to be configured; a resource use request generation module, configured to generate a resource use request according to a measurement result of the first channel quality reported by the terminal, and send the resource use request to a neighbor base station configured with the carrier; and the first confirmation module is used for determining whether to use the carrier wave according to the received feedback information which is sent by the neighbor base station and whether to approve to use the carrier wave.

To achieve the above object, according to another aspect of the present invention, there is provided a base station comprising: a first configuration module, configured to configure all or part of local terminals to measure a first channel quality on a carrier to be configured; a resource use request generation module, configured to generate a resource use request according to a measurement result of the first channel quality reported by the terminal, and send the resource use request to a neighbor base station configured with the carrier; and the first confirmation module is used for determining whether to use the carrier wave according to the received feedback information which is sent by the neighbor base station and whether to approve to use the carrier wave.

In order to achieve the above object, according to another aspect of the present invention, there is provided a base station, including a second configuration module, further configured to configure all or part of local terminals according to a resource usage request sent by a neighbor base station to measure a second channel quality if the neighbor base station configures the carrier; and the second confirmation module is used for determining whether the neighbor base station agrees to use the carrier according to the measurement result of the second channel quality reported by the local terminal and sending corresponding feedback information to the neighbor base station.

To achieve the above object, according to another aspect of the present invention, there is provided a carrier configuration system including: a carrier configuration system, comprising: a first base station and its neighbour base stations, and a first terminal and a second terminal belonging to the first base station and the neighbour base stations, respectively,

the first terminal is configured to measure the channel quality on the carrier to be configured, and report the measurement result to the first base station when the measurement result is greater than or equal to a preset first threshold;

the first base station determines whether the carrier can be used according to the measurement result, and when the carrier can be used, the first base station sends a resource use request to a neighbor base station configured with the carrier; determining whether to use the carrier wave according to the received feedback information of the neighbor base station;

the neighbor base station configures a local second terminal thereof according to the resource use request to measure the channel quality after the carrier is configured by the first base station, determines whether the first base station agrees to use the carrier according to a measurement result reported by the second terminal, and sends corresponding feedback information to the first base station;

the second terminal is configured to measure the channel quality after the carrier is configured by the first base station; and when the measurement result is greater than or equal to a preset second threshold value, reporting the measurement result to the neighbor base station to which the measurement result belongs.

In order to achieve the above object, according to another aspect of the present invention, there is provided a method for triggering a terminal to report an event, including: the terminal measures the SINR value on the carrier wave; and when the SINR value is greater than or equal to a preset threshold value, the terminal generates trigger information containing the SINR value and reports the trigger information to a base station to which the terminal belongs.

The operation of the terminal measuring the SINR value on the carrier specifically includes: measuring RSRP of the local base station and the neighbor base station on the carrier wave; and calculating the SINR value of the terminal on the carrier according to the RSRP.

The trigger information is an Event reported by Event A1.

According to the carrier configuration method, the device and the system, after the carrier is used in the cell, SINR calculation is carried out on the terminal in the cell and the terminal in the adjacent cell, and the base station in the cell is allowed to use the carrier when the signal quality of the terminal in the adjacent cell is reduced and normal work is not influenced, so that new carriers are added, the influence on the terminal in the adjacent cell is kept within a certain threshold, and the terminal in the adjacent cell can keep certain channel quality to normally work.

In addition, in the invention, the terminal adds the SINR value in the Event A1 trigger mechanism and the reported trigger information, and the SINR value can more accurately reflect the channel quality after the loading, so that the base station can accurately judge the influence of the loading wave on the channel quality in the cell, and further judge whether the carrier needs to be added. The terminal calculates the SINR value and reports the SINR value to the base station, so that great signaling overhead is not increased, but the base station does not need to calculate the SINR value again, and the SINR value calculated by the terminal can be directly used, thereby further improving the working efficiency of the system.

Drawings

Figure 1 is a schematic diagram of a prior art inter-Femto cell interference scenario;

fig. 2 is a flowchart of an embodiment of a carrier configuration method of the present invention;

fig. 3 is a block diagram of an embodiment of the terminal of the present invention;

FIG. 4 is a block diagram of a base station embodiment of the present invention;

fig. 5 is a block diagram of another embodiment of a base station of the present invention.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

Method embodiment one

As shown in fig. 2, the embodiment of the carrier configuration method of the present invention includes the following steps: step 202, the first base station HeNB i increases the number of configured carriers according to the service requirement, the HeNB i sends pilot on the carrier k desired to be configured, and configures all or part of the first terminals hue to measure the channel quality of the base station and the neighbor base station on the carrier k to be configured, such as Reference Signal Receiving Power (RSRP) or SINR;

step 204, HUE i measures the RSRP of the local base station and the neighbor base station on the carrier k, and calculates the first time of HUE i on the carrier k according to the following formulaSINR value

<math> <mrow> <msubsup> <mi>SINR</mi> <mi>k</mi> <mi>i</mi> </msubsup> <mo>=</mo> <mfrac> <msubsup> <mi>RSRP</mi> <mi>i</mi> <mi>i</mi> </msubsup> <mrow> <mi>N</mi> <mo>+</mo> <munder> <mi>Σ</mi> <mrow> <mi>j</mi> <mo>&Element;</mo> <msub> <mi>Ψ</mi> <mi>i</mi> </msub> </mrow> </munder> <msubsup> <mi>RSRP</mi> <mi>i</mi> <mi>j</mi> </msubsup> </mrow> </mfrac> <mo>,</mo> </mrow> </math>

Wherein,

the RSRP for the HUE i to HeNB i,

RSRP, Ψ for HUE i to HeNB j_iThe neighbor base station is a set of HeNB i, and N is noise power;

HUE i judgment in step 206

Whether or not greater than threshold SINR_thres1If yes, triggering a measurement report Event A1 (service times counter which threshold) to the HeNBI; otherwise, not reporting;

in the current 3GPP protocol, the value reported by triggering is RSRP or Reference Signal Receiving Quality (RSRQ for short); in this embodiment, the reporting Event a1 may include RSRP of each cell on the carrier k and/or the calculated first SINR value, that is, in the existing Event a1, a mechanism based on SINR triggering is added, or a triggering Event is newly added and triggered based on SINR value;

in this embodiment, the information reported to the HeNB i by the HUE i is first trigger information, which includes a first SINR value;

step 208, after receiving the first trigger information, the HeNB i determines whether the carrier k can be used according to the first trigger information, and if so, generates a resource use request requesting a carrier number configured, and sends the resource use request to a neighbor base station HeNB j configured with the carrier k;

in practice, the HeNB i may include a plurality of HUE i, and in this embodiment, the HeNB i may select all HUE i or randomly select the first trigger information reported by a part of HUE i;

in a plurality of HUE i contained in the HeNB i, part of the HUE i may not report the first trigger information, the HeNB i can weight all the HUE i or a plurality of randomly selected HUE i reported measurement results, and whether a resource use request is generated or not is determined according to the weighted result;

for example, reporting the first trigger information sets the value corresponding to the HUE i to +1, and if the first trigger information is not reported, sets the value corresponding to the HUE i to-1; performing weighted calculation on all the obtained values, and judging that the finally obtained result is a positive value or a negative value; if the value is positive, generating a resource use request; if the value is a negative value, no resource use request is generated, namely, the channel quality on the local terminal is reduced after the carrier k is configured;

the weighting method is not limited to the above method, and may also directly weight the SINR values reported by each terminal, or set different corresponding values, such as +1 and +2, for the size of the reported SINR values, and then weight the corresponding values, and determine whether the carrier can be used according to the weighting result; step 210, after receiving the resource use request, the HeNB j configures the HUE j to measure the channel quality, such as RSRP, of the HeNBj and other neighbor base stations on the carrier k;

step 212, the neighbor base station HeNB j configures the local second terminal HUE j according to the resource use request to measure the channel quality after the HeNB i configures the carrier k, HUE j measures the RSRP of the HeNBj and other neighbor base stations on the carrier k, and calculates the second SINR value according to the following formula:

<math> <mrow> <msubsup> <mi>SINR</mi> <mi>k</mi> <mi>j</mi> </msubsup> <mo>=</mo> <mfrac> <msubsup> <mi>RSRP</mi> <mi>j</mi> <mi>j</mi> </msubsup> <mrow> <mi>N</mi> <mo>+</mo> <munder> <mi>Σ</mi> <mrow> <mi>l</mi> <mo>&Element;</mo> <msub> <mi>Ψ</mi> <mi>j</mi> </msub> </mrow> </munder> <msubsup> <mi>RSRP</mi> <mi>j</mi> <mi>l</mi> </msubsup> </mrow> </mfrac> <mo>,</mo> </mrow> </math>

wherein,

RSRP for HUE j to HeNB j,

RSRP, Ψ of other base stations neighboring HUE j to the HeNB j_jThe base station is a neighbor other base station set of the HeNB j, and N is noise power;

step 214, HUE j judgment

Whether or not greater than threshold SINR_thres2Triggering a measurement reporting Event A1 to the HeNB j; otherwise, not reporting; the information reported by HUE j to HeNB j is the second trigger information, similar to step 206,the second trigger information may include RSRP values of cells on the carrier k and/or the calculated second SINR value;

step 216, the HeNB j determines whether the HeNB i agrees to use the carrier k according to the received second trigger information reported by the HUE j, generates corresponding feedback information and sends the feedback information to the HeNBi;

similar to the step 208, in a plurality of HUE i included in the HeNB j, there may be a portion of HUE j without the second trigger information reported, and after the HeNB j performs weighting calculation on all HUE j or a plurality of randomly selected HUE j, the HeNB j determines whether to agree with the HeNB i to use the carrier k according to a result of the weighting calculation;

in step 208 and step 216 of this embodiment, the method for the base station to determine whether to generate the resource use request or to grant the neighbor base station to use the carrier according to the received terminal trigger information is not limited to the above method, and other methods may be used to determine;

in step 218, the HeNB i determines whether to use the carrier according to the received feedback information of all the neighbor base stations.

The local base station may have a plurality of neighbor base stations, and the local base station may weight the determination result of the neighbor base station according to the feedback information of the neighbor base station, for example: the base station agreeing to use the carrier sets the corresponding value to be +1, the corresponding value which is not agreed to be-1, all the obtained values are subjected to weighted calculation, and the final obtained result is a positive value or a negative value; if the carrier wave k is positive, the overall channel quality of the network is improved after the carrier wave k is used, and the carrier wave k can be used; if the value is negative, it indicates that the channel quality of the network as a whole is degraded after using the carrier k, and the carrier should not be used. Of course, the method for the local base station to determine whether to use the carrier according to the feedback information of the neighbor base station is not limited to the above method, and other methods may be selected according to actual needs.

In the carrier configuration method of this embodiment, before configuring a carrier in a current cell, a negotiation is performed between the current cell and a base station of an adjacent cell, SINR calculation is performed on terminals in the current cell and the adjacent cell, and the base station of the current cell is allowed to use the carrier when the signal quality of the terminal in the adjacent cell is reduced and normal operation is not affected, so that new carriers are added, the effect on the terminals in the adjacent cell is kept within a certain threshold, and the terminals in the adjacent cell can keep a certain channel quality to perform normal operation.

In addition, the terminal adds the SINR value in the Event a1 trigger mechanism and the reported trigger information, and because the SINR value can more accurately reflect the channel quality after loading, the base station can accurately judge the influence of loading on the channel quality in the cell, and further judge whether to add the carrier. The terminal calculates the SINR value and reports the SINR value to the base station, so that great signaling overhead is not increased, but the base station does not need to calculate the SINR value again, and the SINR value calculated by the terminal can be directly used, thereby further improving the working efficiency of the system.

Preferably, step 206 is followed by: step 207, the HeNB i receives the message containing the HeNB i

And the following formula calculates the utility value U of the HeNB i on the carrier k_i，k，

Wherein r is_i，kIncreasing the carrier k to be configured for HeNB i if the HeNB i uses the carrier k to be configuredAdded throughput, i.e. data rate of the HeNBI at the carrier k

Wherein

The SINR value of the carrier k to be configured is set for the HeNB i; r_iThe total throughput when the HeNB i does not use the carrier k; n is the number of other base stations which are currently using the carrier k and have interference relation with the HeNB i;

in step 208, the resource use request generated by the HeNB i includes utility value U_i，k；

Step 214 is followed by step 215, in which the HeNB j receives the packet

And calculating the utility value U of the HeNB j in the carrier k by the following formula_j，k，

U_{j, k} = \frac{r_{j, k}}{R_{j}},

Wherein r is_j，kA reduced throughput after allowing HeNB i to use the carrier k for HeNB j,

wherein

SINR value of HeNBj in carrier k when carrier k is not used by HeNB i，

If the HeNB i uses the carrier k, the SINR value of the HeNB j on the carrier k is obtained; r_jTotal throughput when HeNB i is not allowed to use carrier k for HeNB j;

in step 216, when U is detected_j，kGreater than or equal to U in resource use request_i，kAnd if not, rejecting the HeNB i to use the carrier k.

Preferably, the feedback information may include the second utility value of each neighboring base station, or include SINR measured by each terminal at each base station. If the feedback information reported by the HeNBj contains the utility value U_j，kThen the HeNB i weights the utility values of all the neighbor base stations according to the received information of all the neighbor base stations, and judges whether the weighted utility value is larger than or equal to the utility value U of the HeNBI on the carrier k_i，kIf yes, the carrier k is used, and if not, the throughput of the whole system is reduced after the carrier k is increased, so that the carrier k cannot be increased.

In the above preferred embodiment, the HeNB i and the HeNB j further evaluate the throughput of the entire system after increasing the carrier k by calculating the utility value, that is, compare the relationship between the throughput increased by the local base station and the throughput decreased by the neighbor base station. The impact of adding carrier k on the overall system is more accurately judged and it is determined whether or not to agree to add the carrier.

The first terminal or the second terminal referred to in the present invention does not refer to only one terminal, but refers to a set of all terminals under each base station.

Apparatus embodiment one

As shown in fig. 3, the terminal embodiment of the present invention includes:

a measuring module 32, configured to measure the channel quality of the terminal on a carrier according to a configured carrier of a local base station;

a comparison module 34 for comparing the measurement result with a preset threshold;

and a trigger information generating module 36, configured to generate trigger information and report the trigger information to the base station to which the terminal belongs when the sum of the measurement results is greater than or equal to a preset threshold.

In this embodiment, the signal quality measured by the terminal is RSRP or SINR.

A measuring module 32, for measuring the RSRP of the local base station and the neighbor base station on the carrier according to the configuration of the local base station, calculating the SINR value of the terminal on the carrier according to the following formula,

wherein,

for the RSRP of the first terminal to the first base station,

The trigger information generating module 36 generates trigger information including the SINR value, and reports the trigger information to the base station to which the terminal belongs.

In this embodiment, the terminal calculates the SINR after the load increase, so that the base station determines the change of the terminal signal quality in the local cell and the neighboring cell after the load increase, and further determines whether to agree to increase the carrier.

In addition, the SINR value is added to the Event a1 trigger mechanism and the reported trigger information, and since the SINR value can more accurately reflect the channel quality after loading, the base station can accurately judge the influence of loading on the channel quality in the cell, and further judge whether to add the carrier. The terminal calculates the SINR value and reports the SINR value to the base station, so that great signaling overhead is not increased, but the base station does not need to calculate the SINR value again, and the SINR value calculated by the terminal can be directly used, thereby further improving the working efficiency of the system.

Device embodiment II

As shown in fig. 4, the base station of the embodiment of the present invention includes:

a first configuration module 42, configured to configure all or part of local terminals to measure a first channel quality on a carrier to be configured;

a resource usage request generating module 44, configured to generate a resource usage request according to a measurement result of the first channel quality reported by the terminal, and send the resource usage request to a neighbor base station configured with the carrier;

a first confirming module 46, configured to determine whether to use the carrier according to the received feedback information of whether to approve the use of the carrier sent by the neighbor base station.

In this embodiment, for a plurality of terminals under the base station, the resource usage request generating module 44 receives first trigger information reported by the terminal according to the measurement result of the first channel quality, determines whether the carrier can be used according to all or part of the first trigger information, and generates a resource usage request when the carrier can be used.

The first trigger information includes a first SINR value measured by the local terminal on the carrier to be configured.

The base station of this embodiment negotiates between the local cell and the base station of the neighboring cell before configuring the carrier in the local cell, and allows the base station of the local cell to use the carrier when the reduction of the signal quality of the terminal in the neighboring cell does not affect the normal operation, so that the influence on the terminal in the neighboring cell is kept within a certain threshold when a new carrier is added, and the terminal in the neighboring cell can keep a certain channel quality to perform the normal operation.

Preferably, this embodiment further includes: a first calculating module 48, configured to calculate a first utility value U of the base station on the carrier to be configured according to the first SINR value reported by the terminal_i，k，

Wherein r is_i，kIncreased throughput for the base station after using the carrier k, i.e. the data rate at the carrier kWherein

The SINR value of the base station on the carrier k is obtained; r_iIs the total throughput when the base station is not using carrier k; n is the number of other base stations which are currently using a carrier k and have interference relation with the base station;

and a resource usage request generating module 44, configured to generate a resource configuration request including the first utility value, and send the resource configuration request to the neighbor base station configured with the carrier.

Device embodiment III

As shown in fig. 5, another embodiment of the base station of the present invention includes:

a second configuration module 52, configured to configure all or part of local terminals according to the resource usage request sent by the neighbor base station to measure a second channel quality after the neighbor base station configures the carrier;

a second determining module 54, configured to determine whether the neighbor base station agrees to use the carrier according to the measurement result of the second channel quality reported by the local terminal, and send corresponding feedback information to the neighbor base station.

And a second confirmation module 54, configured to determine whether the neighbor base station agrees to use the carrier according to all or part of the second trigger information, based on the second trigger information reported by the receiving terminal according to the measurement result.

And the second trigger information includes a second SINR value measured by the local terminal if the first base station configures the carrier.

Preferably, this embodiment further includes: a second calculating module 56, configured to calculate a second effective value U of the neighboring base station in the carrier according to a second SINR value reported by the terminal_j，k，

U_{j, k} = \frac{r_{j, k}}{R_{j}},

Wherein r is_j，kFor reduced throughput if the base station allows its neighbor base stations to use the carrier k,whereinFor SINR values of a neighbor base station at carrier k when the base station is not using the carrier k,

the SINR value of the base station at carrier k when the carrier k is used by a neighbor base station; r_jTotal throughput when the neighbor base station is not allowed to use carrier k for the base station;

the second confirmation module 54, when the second utility value is greater than or equal to the first utility value in the resource usage request sent by the neighbor base station, the base station agrees the neighbor base station to use the carrier, otherwise, the neighbor base station is rejected to use the carrier.

In a preferred mode, the base station further evaluates the throughput of the whole system after increasing the carrier k by calculating the utility value, that is, compares the relationship between the throughput increased by the local base station and the throughput decreased by the neighbor base station. The impact of adding carrier k on the overall system is more accurately judged and it is determined whether or not to agree to add the carrier.

Preferably, the feedback information generated by the second confirmation module 54 may include the second utility value of each neighboring base station, or include SINR measured by each terminal at each base station.

The second device embodiment and the third device embodiment respectively describe the structures of the local base station and the neighbor base station. In practical cases, one base station is often used as both a local base station and a neighbor base station, and therefore, the base station may include all modules in the second device embodiment and the third device embodiment, and the function of each module is the same as that in the second device embodiment and the third device embodiment, and is not described again here.

System embodiment

As shown in fig. 2, an embodiment of the carrier configuration system of this embodiment includes: a first base station HeNB i and its neighbour base stations HeNB j, and a first terminal HUE i and a second terminal HUE j belonging to HeNB i and HeNB j, respectively,

the first terminal HUE i is used for measuring a first SINR value on the carrier to be configured, and reporting the first trigger information to the first base station HeNB i when the first SINR value is larger than or equal to a preset first threshold value;

the first base station HeNB i is used for configuring the HUE i to measure a first SINR value on the carrier to be configured, determining whether the carrier can be used according to the first SINR value measured by the HUE i, and sending a resource use request to the HeNB j configured with the carrier when the carrier can be used; determining whether to use the carrier wave according to the received feedback information of the HeNB j;

the second base station HeNB j is configured with HUE j according to the resource use request to measure a second SINR value after the HeNB i is configured with the carrier, whether the HeNB i is allowed to use the carrier is determined according to second trigger information reported by the second terminal, and corresponding feedback information is sent to the first base station;

the second terminal HUE j measures a second SINR value after the first base station HeNB i is configured with the carrier according to the configuration of the second base station HeNB j; and when the second SINR value is greater than or equal to a preset second threshold value, reporting the second trigger information to the HeNB j.

In this embodiment, the working processes of the base stations HeNB i and HeNB j and the terminals HUE i and HUE j and the signal interaction therebetween have been described in detail in the above method embodiment, and are not described herein again.

In the carrier configuration system of this embodiment, after the carrier is used in the cell, SINR calculation is performed on the terminal in the cell and the terminal in the adjacent cell, and the base station in the cell is allowed to use the carrier when the reduction of the signal quality of the terminal in the adjacent cell does not affect normal operation, so that the influence on the terminal in the adjacent cell is kept within a certain threshold due to the addition of a new carrier, and the terminal in the adjacent cell can keep a certain channel quality to perform normal operation.

Method embodiment two

The embodiment of the method for triggering the terminal reporting event comprises the following steps:

A. the terminal measures the SINR value on the carrier wave;

B. and when the SINR value is greater than or equal to a preset threshold value, the terminal generates trigger information containing the SINR value and reports the trigger information to a base station to which the terminal belongs.

The SINR value may be obtained as follows:

measuring RSRP of the local base station and the neighbor base station on the carrier wave;

and calculating the SINR value of the terminal on the carrier according to the RSRP.

In this embodiment, the calculation can be performed according to the following formula

Wherein,

the RSRP for the HUE i to HeNB i,

RSRP, Ψ for HUE i to HeNB j_iAnd N is noise power.

The trigger information is an Event reported by Event A1.

In the present invention, the calculation method of the SINR value is not limited to the calculation according to the measured RSRP in the embodiment, and may also be calculated according to other measured parameters, and these calculation methods are not described in detail herein.

In this embodiment, the terminal adds the SINR value to the Event a1 trigger mechanism and the reported trigger information, and since the SINR value can more accurately reflect the channel quality after loading, the base station can accurately judge the influence of loading on the channel quality in the cell, and further judge whether to add the carrier. The terminal calculates the SINR value and reports the SINR value to the base station, so that great signaling overhead is not increased, but the base station does not need to calculate the SINR value again, and the SINR value calculated by the terminal can be directly used, thereby further improving the working efficiency of the system.

The devices described herein may be implemented by various means. For example, these techniques may be implemented in hardware, firmware, software, or a combination thereof. For a hardware implementation, the implementation may be within one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), processors, controllers, micro-controllers, microprocessors, electronic devices, other electronic units designed to perform the functions described herein, or a combination thereof.

For a firmware and/or software implementation, the techniques may be implemented with modules (e.g., procedures, steps, flows, and so on) that perform the functions described herein. The firmware and/or software codes may be stored in a memory and executed by a processor unit. The memory may be implemented within the processor or external to the processor.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for configuring a carrier, comprising:

A. the first base station determines whether the carrier can be used according to the measurement result of the channel quality of a local first terminal on the carrier to be configured, and when the carrier can be used, a resource use request is sent to a neighbor base station configured with the carrier;

2. The carrier configuration method according to claim 1, wherein the operation of the first base station determining whether the carrier can be used according to the measurement result of the channel quality of the local first terminal on the carrier to be configured comprises:

3. The carrier configuration method according to claim 2, wherein the step a01 specifically includes:

wherein,for the RSRP of the first terminal to the first base station,

4. The carrier configuration method according to claim 3, wherein the first trigger information comprises the first SINR value and/or RSRP.

5. The carrier configuration method according to claim 1, wherein the step B specifically includes:

6. The carrier configuration method according to claim 1, wherein in step a, the first base station sends a resource usage request including a number of a carrier requested to be configured to the neighbor base station configured with the carrier.

7. The carrier configuration method according to claim 4, wherein in the step A,

the first base station receives first trigger information which is reported by the first terminal and contains the first SINR value, and calculates a first utility value U of the first base station on the carrier to be configured according to the following formula_i，k，

Wherein r is_i，kThe throughput of the first base station is increased if the first base station uses the carrier k to be configured, that is, the data rate of the first base station on the carrier k to be configured

Wherein

8. The carrier configuration method according to claim 7, wherein the step B further comprises:

the second terminal reports second trigger information containing a second SINR value to the neighbor base station to which the second terminal belongs;

U_{j, k} = \frac{r_{j, k}}{R_{j}},

wherein

9. A terminal, comprising:

a measuring module, configured to measure, according to configuration of a local base station, channel quality of the terminal on the carrier;

the comparison module is used for comparing the measurement result with a preset threshold value;

and the trigger information generating module is used for generating trigger information and reporting the trigger information to the base station to which the terminal belongs when the sum of the measurement results is greater than or equal to a preset threshold value.

10. The terminal of claim 9, wherein the measurement module measures RSRP of local base stations and neighbor base stations on the carrier according to the configuration of the local base stations, calculates SINR values of the terminal on the carrier according to the following formula,

wherein,

for the RSRP of the first terminal to the first base station,

11. The terminal of claim 10, wherein the trigger information generating module generates trigger information including the SINR value, and reports the trigger information to a base station to which the terminal belongs.

12. A base station, comprising:

a first configuration module, configured to configure all or part of local terminals to measure a first channel quality on a carrier to be configured;

a resource use request generation module, configured to generate a resource use request according to a measurement result of the first channel quality reported by the terminal, and send the resource use request to a neighbor base station configured with the carrier;

and the first confirmation module is used for determining whether to use the carrier wave according to the received feedback information which is sent by the neighbor base station and whether to approve to use the carrier wave.

13. The base station of claim 12, wherein the resource usage request generating module determines whether the carrier can be used according to all or part of the first trigger information, based on the first trigger information reported by the receiving terminal according to the measurement result of the first channel quality, and generates the resource usage request when the carrier can be used.

14. The base station of claim 13, wherein the first trigger information includes a first SINR value measured by a local terminal on a carrier to be configured.

15. The base station of claim 14, further comprising:

a first calculating module, configured to calculate a first utility value U of the base station on the carrier to be configured according to a first SINR value reported by the terminal_i，k，

Wherein r is_i，kIs the increased throughput after the base station uses the carrier k to be configured, i.e. the data rate of the carrier k to be configured

WhereinThe SINR value of the carrier k to be configured is the base station; r_iIs the groupTotal throughput when the station is not using the carrier k to be configured; n is the number of other base stations which are currently using a carrier k and have interference relation with the base station;

and the resource use request generating module is used for generating a resource configuration request containing the first utility value and sending the resource configuration request to the neighbor base station configured with the carrier.

16. The base station according to any of claims 12 to 15, further comprising:

the second configuration module is further configured to configure all or part of local terminals according to the resource usage request sent by the neighbor base station to measure the quality of a second channel after the neighbor base station configures the carrier;

and the second confirmation module is used for determining whether the neighbor base station agrees to use the carrier wave according to the measurement result of the second channel quality reported by the local terminal.

17. A base station, comprising

and the second confirmation module is used for determining whether the neighbor base station agrees to use the carrier according to the measurement result of the second channel quality reported by the local terminal and sending corresponding feedback information to the neighbor base station.

18. The base station of claim 17, wherein the second determining module determines whether the neighbor base station is allowed to use the carrier according to all or part of the second trigger information, and the second trigger information reported by the receiving terminal according to the measurement result.

19. The base station of claim 18, wherein the second trigger information includes a second SINR value measured by the local terminal if the carrier is configured by the first base station.

20. The base station of claim 19, further comprising: a second calculating module, further configured to calculate a second utility value U of the neighboring base station in the carrier according to a second SINR value reported by the terminal_j，k，

U_{j, k} = \frac{r_{j, k}}{R_{j}},

Wherein r is_j，kFor reduced throughput if the base station allows its neighbor base stations to use the carrier k,

wherein

For SINR values of a neighbor base station at carrier k when the base station is not using the carrier k,if the neighbor base station uses the SINR value of the carrier k to be configured, the base station at the carrier k; r_jTotal throughput when neighbor base stations are not allowed to use carrier k for the base station;

and the second confirmation module is used for allowing the neighbor base station to use the carrier when the second utility value is larger than or equal to the first utility value in the resource use request sent by the neighbor base station, and refusing the neighbor base station to use the carrier if the second utility value is not larger than or equal to the first utility value in the resource use request sent by the neighbor base station.

21. The base station according to any of claims 17 to 20, further comprising:

22. A carrier configuration system, comprising: a first base station and its neighbour base stations, and a first terminal and a second terminal belonging to the first base station and the neighbour base stations, respectively,

23. The carrier configuration system according to claim 22, wherein the measurement result reported by the first terminal is first trigger information including a first SINR value; and the measurement result reported by the second terminal is second trigger information containing a second SINR value.

24. A method for triggering a terminal reporting event is characterized by comprising the following steps:

the terminal measures the SINR value on the carrier wave;

and when the SINR value is greater than or equal to a preset threshold value, the terminal generates trigger information containing the SINR value and reports the trigger information to a base station to which the terminal belongs.

25. The method for triggering event reporting on a terminal of claim 24, wherein the operation of the terminal to measure the SINR value on the carrier specifically includes:

26. The method as claimed in claim 24, wherein the trigger information is an Event a1 report Event.