WO2014194799A1

WO2014194799A1 - Communication method, radio network controller and user equipment

Info

Publication number: WO2014194799A1
Application number: PCT/CN2014/079042
Authority: WO
Inventors: 胡文权; 杨毅; 花梦
Original assignee: 华为技术有限公司
Priority date: 2013-06-06
Filing date: 2014-06-03
Publication date: 2014-12-11
Also published as: CN104244353A

Abstract

Provided are a communication method, a radio network controller and a user equipment. The method is used for communications in a soft handoff area in a heterogeneous network. The heterogeneous network comprises a micro station and a macro station. The method comprises: when it is detected that a user equipment (UE) enters a soft handoff area, determining a cell in which the micro station is located as a serving cell of the UE, wherein the uplink signal receiving quality of the micro station to the UE is superior to that of the macro station to the UE; configuring an almost blank subframe (ABS) for the macro station; and sending first information to the micro station and sending second information to the macro station respectively, wherein the first information is used for indicating that the micro station sends downlink data to the UE at normal power over the ABS, and the second information is used for indicating that the macro station does not send downlink data over the ABS or reduce the transmission power of the downlink data. The embodiments of the present invention can improve the data transmission efficiency of the UE in the soft handoff area of the heterogeneous network.

Description

TECHNICAL FIELD The present invention relates to communication technologies, and in particular, to a communication method, a radio network controller, and a user equipment. Background technique

In the soft handoff process of the traditional Wideband Code Division Multiple Access (WCDMA) system, the user equipment (User Equipment, UE) maintains a communication link with the original base station and the new base station, only when the user equipment and the new base station After establishing stable communication, disconnect the original base station. The role of soft handoff is to maintain the continuity of voice or data transmission as the user equipment moves, while soft handoff can achieve macro diversity gain for uplink data transmission.

Heterogeneous Networks (HetNet) is a network structure in which Hezhong's macro-cells and micro-cells are deployed in a mixed manner, which has significant advantages in improving network capacity and expanding coverage. The uplink and downlink imbalances exist in the heterogeneous network, including: when the macro station signal power received by the UE is equal to the micro station signal power received by the UE, the location where the UE is located may be referred to as a downlink balance point, because the macro station transmits The power is large, the micro station has low transmission power, and the downlink balance point is close to the micro station. Therefore, when the UE sends an uplink signal at the downlink balance point, the macro station receives the uplink signal and the micro station receives the uplink signal. The power at the time is different, which is an ups and downs imbalance. The soft handover area refers to an area where the UE receives the downlink signal quality of a plurality of base stations, and is usually an area near the downlink balance point. Under the coverage of the heterogeneous network, the uplink and downlink imbalances in the soft handover area may cause some potential problems for the UE in the area. For example, the power of the uplink signal sent by the UE received by the macro station is weak, and the UE receives the micro. The power of the downlink signal sent by the station may be weak, and the downlink signal sent by the micro-station received by the UE may be strongly interfered by the macro station. These potential problems will make the data transmission efficiency of the UE in the softswitch area of the heterogeneous network poor, affecting the user experience. SUMMARY OF THE INVENTION In view of this, an embodiment of the present invention provides a communication method, a radio network controller, and a user equipment, which are used to solve the problem of poor data transmission efficiency of a heterogeneous network soft handover area in the prior art.

In a first aspect, a communication method is provided for soft handoff area communication in a heterogeneous network, Heterogeneous networks include micro stations and macro stations, including:

When it is detected that the user equipment UE enters the soft handover area, the cell where the micro station is located is determined to be the serving cell of the UE, where the uplink signal reception quality of the micro station to the UE is better than the macro station pair. The uplink signal reception quality of the UE;

Almost blank subframe ABS is configured for the macro station;

Transmitting the first information to the micro station, and sending the second information to the macro station, where the first information is used to instruct the micro station to send downlink data to the UE at normal power, the The second information is used to indicate that the macro station does not send downlink data or reduce transmission power of downlink data on the ABS.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the first information is further used to:

And sending, by the micro station, the UE, to indicate that the UE obtains, according to an absolute power of a downlink dedicated physical channel DPCCH from the micro station, received by the other sub-frames on other subframes except the ABS. The power control command word is used to instruct the micro station to adjust the downlink transmit power.

In conjunction with the first aspect or the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the method further includes:

After receiving the Id measurement report reported by the UE through the micro station, ignoring the Id measurement report; or

And transmitting, by the micro station, radio resource control RRC signaling to the UE, where the RRC signaling is used to instruct the UE to stop Id event measurement and reporting.

With reference to the first aspect, or any one of the first to the second possible implementation manners of the first aspect, in a third possible implementation manner of the first aspect, The serving cell of the UE, including:

If the serving cell of the UE before entering the soft handover area is the cell where the micro station is located, it is determined that the serving cell is the same as the cell where the micro station is located after entering the soft handover area; or

If the serving cell before the UE enters the soft handover area is the cell where the macro station is located, it is determined that the serving cell is switched from the cell where the macro station is located to the cell where the micro station is located after entering the soft handover area.

In a second aspect, a communication method is provided for soft handoff area communication in a heterogeneous network, where the heterogeneous network includes a micro station and a macro station, including:

Sending a measurement report to the radio network controller RNC, such that the RNC is based on the measurement report Determining that the UE enters the soft handover area, and determining that the UE is in the soft handover area, determining the cell where the micro station is located as the serving cell of the UE, where the uplink station receives the uplink signal quality of the UE Better than the uplink signal reception quality of the macro station to the UE;

Receiving information of the almost blank subframe ABS sent by the RNC, receiving downlink data sent by the micro station at normal power on the ABS according to the information of the ABS, and the downlink data sent by the macro station is not on the ABS or The macro station reduces the downlink data sent by the power.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes: determining, according to the information about the ABS, on other subframes except the ABS, according to the received from the other subframes The absolute power of the downlink dedicated physical channel DPCCH of the micro station is obtained by the power control command word, and the power control command word is used to instruct the micro station to adjust the downlink transmit power.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a second possible implementation manner of the second aspect, the method further includes:

When the serving cell changes, the uplink DPCCH is transmitted according to the predetermined power hopping value, where the absolute value of the power hopping value is greater than the 歩 value when the UE performs power control on the uplink DPCCH.

In conjunction with the second possible implementation of the second aspect, in a third possible implementation of the second aspect,

When the serving cell of the UE is switched from the cell where the macro station is located to the cell where the micro station is located, the power hopping value is a downward hopping, so that the transmitting power of the uplink DPCCH is rapidly decreased; or

When the serving cell of the UE is switched from the cell where the micro station is located to the cell where the macro station is located, the power hopping value is an upward hopping, so that the transmitting power of the uplink DPCCH is rapidly increased.

With reference to the second aspect or the first to the third possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the method further includes:

Sending, by the micro station, an Id measurement report to the RNC, so that the RNC ignores the Id measurement report; or

Receiving, by the RNC, the radio resource control RRC signaling sent by the micro station, and stopping the Id event measurement and reporting according to the RRC signaling.

In a third aspect, a radio network controller RNC is provided for soft handoff area communication in a heterogeneous network, the heterogeneous network including a micro station and a macro station, including:

a processor, configured to: when detecting that the user equipment UE enters the soft handover area, where the micro station is located Determining a cell as a serving cell of the UE, and configuring an almost blank subframe ABS for the macro station, where an uplink signal reception quality of the micro station to the UE is better than that of the macro station to the UE Uplink signal reception quality;

a transmitter, configured to send the first information to the micro station, and send the second information to the macro station, where the first information is used to indicate that the micro station sends the normal station power to the UE Downstream data, the second information is used to indicate that the macro station does not send downlink data or reduce transmission power of downlink data on the ABS.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the first information sent by the sender is further used to:

With reference to the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect,

The RNC further includes a receiver, the receiver is configured to receive an Id measurement report reported by the UE by using the micro station, and the processor is further configured to: after the receiver receives the Id measurement report, ignore The Id measurement report; or,

The transmitter is further configured to send, by using the micro station, radio resource control RRC signaling to the UE, where the RRC signaling is used to instruct the UE to stop Id event measurement and reporting.

With reference to the third aspect, or any one of the first to the second possible implementation manners of the third aspect, in a third possible implementation manner of the third aspect, the determining, by the processor, the cell where the micro station is located For the serving cell of the UE, including:

The fourth aspect provides a user equipment UE, which is used for soft handover area communication in a heterogeneous network, where the heterogeneous network includes a micro station and a macro station, including:

a transmitter, configured to send a measurement report to the radio network controller RNC, so that the RNC determines, according to the measurement report, that the UE enters the soft handover area, and when determining that the UE enters the soft handover area, The cell where the micro station is located is determined to be the serving cell of the UE, where the uplink signal receiving quality of the micro station to the UE is better than the uplink signal receiving quality of the macro station to the UE;

a receiver, configured to receive information about an almost blank subframe ABS sent by the RNC, receive downlink data sent by the micro station at normal power according to information of the ABS, and the downlink sent by the macro station is not on the ABS. The data is either downlink data for which the macro station reduces power transmission.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the method further includes: a processor, configured to: according to the information of the ABS, on other subframes except the ABS, according to the other subframes The received absolute power of the downlink dedicated physical channel DPCCH from the micro station is obtained by the power control command word, where the power control command word is used to instruct the micro station to adjust the downlink transmit power.

In conjunction with the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner of the fourth aspect, the transmitter is further configured to:

In conjunction with the second possible implementation of the fourth aspect, in a third possible implementation manner of the fourth aspect, the transmitter is specifically configured to:

When the serving cell of the UE is switched from the cell where the macro station is located to the cell where the micro station is located, the uplink DPCCH is transmitted according to the predetermined power hopping value, and the absolute value of the power hopping value is greater than the UE pair. The uplink DPCCH performs a power control time length value, and the power hopping value is a downward hopping, so that the uplink DPCCH transmission power is rapidly decreased; or

When the serving cell of the UE is switched from the cell where the micro station is located to the cell where the macro station is located, the uplink DPCCH is transmitted according to a predetermined power hopping value, where the absolute value of the power hopping value is greater than the UE pair. The uplink DPCCH performs a power control time length value, and the power hopping value is an upward hopping, so that the uplink DPCCH transmission power is rapidly increased.

With reference to the fourth aspect, or any one of the first to third possible implementation manners of the fourth aspect, in a fourth possible implementation manner of the fourth aspect,

The transmitter is further configured to: send, by the micro station, an Id measurement report to the RNC, so that the RNC ignores the Id measurement report; or

The receiver is further configured to: receive radio resource control RRC signaling sent by the RNC by using the micro station, to stop Id event measurement and reporting according to the RRC signaling.

Through the foregoing technical solution, when the UE enters the soft handover area, the cell where the micro station is located is determined as the UE. The serving cell can enable the UE to send the uplink control data to the cell with better receiving quality, and can improve the transmission quality of the uplink control data. In addition, by configuring the ABS information, the downlink data can be normally sent on the cell where the micro station is located. The downlink data is not transmitted on the cell where the macro station is located or the downlink data is transmitted under reduced power, which can reduce the interference of the macro station to the micro station and improve the transmission quality of the downlink data. Therefore, by the above processing, the communication quality of the soft handover area UE can be improved. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, a brief description of the drawings to be used in the description of the embodiments will be briefly made. It is obvious that the drawings in the following description are some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative labor.

1 is a schematic structural diagram of a heterogeneous network according to an embodiment of the present invention;

2 is a schematic flowchart of a communication method according to an embodiment of the present invention;

FIG. 3 is a schematic flowchart diagram of another communication method according to an embodiment of the present disclosure;

4 is a schematic diagram of a DPC transmission sequence of a soft handover area after introducing an ABS according to an embodiment of the present invention; FIG. 5 is a schematic flowchart of another communication method according to an embodiment of the present invention;

FIG. 6 is a schematic flowchart diagram of another communication method according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of an RNC according to an embodiment of the present disclosure;

FIG. 8 is a schematic structural diagram of another RNC according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a UE according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural diagram of another UE according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Referring to FIG. 1, a schematic diagram of a heterogeneous network includes a macro station 11 and a micro station 12, a coverage area of a macro station is represented by 111, a coverage area of a micro station is represented by 121, and a coverage area of a macro station. The macro cell may be referred to as a micro cell, the coverage area of the micro station may be referred to as a micro cell, the macro cell is larger than the micro cell, and the macro cell includes a micro cell. The uplink signal reception quality of the micro station to the UE is better than the uplink signal reception quality of the macro station to the UE. The loop formed by the lower balance point is indicated by 13, and the soft switching region is represented as a filled region, and its boundary lines can be represented as 141 and 142, respectively. As can be seen from FIG. 1, when the UE 15 is located in the soft handover area, it is closer to the micro station. Therefore, when the UE transmits the uplink signal, the uplink station receives less power, and when the UE is close to the macro station, The soft handover area, that is, the area between the loop line 13 and the loop line 142, the downlink signal power sent by the UE receiving the macro station is greater than the downlink signal power sent by the receiving micro station, that is, the downlink signal power of the receiving micro station is weak, and is subjected to a macro. Strong interference from the station. The above problems in the soft handoff area will affect the data transmission efficiency, which in turn affects the user experience. To solve these problems, the present invention provides the following embodiments.

FIG. 2 is a schematic flowchart of a communication method according to an embodiment of the present disclosure. The communication method may be used for soft handover area communication in a heterogeneous network, where the heterogeneous network includes a micro station and a macro station, and the method includes:

a radio network controller (RNC), when detecting that the UE enters the soft handover area, determining the cell where the micro station is located as the serving cell of the UE, where the micro station is to the UE The uplink signal receiving quality is better than the uplink signal of the macro station to the UE. The determining the cell where the micro station is located as the serving cell of the UE includes: if the UE is entering a soft handover If the serving cell in the area is the cell where the micro station is located, it is determined that the serving cell is the same as the cell where the micro station is located after entering the soft handoff area; or

In addition, taking the original serving cell of the UE as a macro cell as an example, unlike the prior art, the embodiment of the present invention performs handover of the serving cell when the UE enters the soft handover area. For example, referring to FIG. 1, when the UE enters At boundary line 142, the serving cell switches from the macro cell to the micro cell. In the prior art, the serving cell handover occurs at the downlink balance point, that is, when the UE enters the ring line 13, the serving cell handover is performed.

By performing handover of the serving cell when the UE enters the soft handover area, the problem caused by the weak uplink reception power of the macro station can be solved. For example, when the serving cell is still a macro cell, since the uplink station receives weak power, the The reliability of the uplink feedback data transmission is poor, and the quality of service is affected. The serving cell is determined to be a micro cell. Since the uplink receiving power of the micro station is strong, the uplink feedback data transmission can be guaranteed, and the service quality is improved. 22: The RNC configures an Almost Blank Subframe (ABS) for the macro station;

The RNC sends the first information to the micro station, and sends the second information to the macro station, where the first information is used to indicate that the micro station sends the normal power to the UE on the ABS. Downstream data, the second information is used to indicate that the macro station does not send downlink data or reduce transmission power of downlink data on the ABS.

The RNC can configure the ABS. On the ABS, the macro station does not send or reduce the power to transmit downlink data, and the micro station transmits the downlink data at normal power. Normal power can mean transmitting according to the configured power, and reducing power transmission can mean transmitting with low power of configured power. In this way, the downlink interference caused by the macro station to the micro station can be avoided, so as to solve the problem that the downlink signal power of the micro station may be weak, and the downlink may be strongly interfered by the macro station.

It can be understood that the ABS between the RNC and the macro station, and the ABS between the RNC and the micro station, can refer to subframes having the same time period.

Optionally, the first information is further used to:

And sending, by the micro station, the UE, to indicate that the UE obtains, according to the absolute power of the downlink dedicated physical channel DPCCH from the micro cell received on the other subframe, on other subframes except the ABS. The power control command word is used to instruct the micro station to adjust downlink transmit power.

Optionally, the method further includes:

The RNC ignores the Id measurement report after receiving the Id measurement report reported by the UE through the micro station; or

The RNC sends the RRC signaling to the UE by using the micro station, where the RRC signaling is used to indicate that the UE stops the Id event measurement and reporting.

Wherein, the above-mentioned Id measurement report may refer to discarding the Id measurement report or not processing according to the Id measurement report.

Correspondingly, the process performed by the UE side can be seen in Figure 3, including:

The UE sends a measurement report to the RNC, so that the RNC determines that the UE enters the soft handover area according to the measurement report, and determines that the cell where the micro station is located is the UE when determining that the UE enters the soft handover area. a serving cell, where the uplink signal reception quality of the micro station to the UE is better than the uplink signal reception quality of the macro station to the UE;

32: The UE receives the information of the ABS sent by the RNC, according to the information of the ABS in the ABS. Receiving downlink data sent by the micro station at normal power, and the ABS does not have downlink data sent by the macro station or downlink data sent by the macro station to reduce power.

Optionally, the method further includes:

The UE obtains a power control command word according to the absolute power of the downlink dedicated physical channel DPCCH from the micro station received in the other subframes according to the information of the ABS in other subframes except the ABS. The power control command word is used to instruct the micro station to adjust the downlink transmit power.

Optionally, the method further includes:

The UE transmits an uplink DPCCH according to a predetermined power hopping value when the serving cell changes, and the absolute value of the power hopping value is greater than a 歩 value when the UE performs power control on the uplink DPCCH.

Optionally, when the serving cell of the UE is switched from the cell where the macro station is located to the cell where the micro station is located, the power hopping value is a downward hopping, so that the transmitting power of the uplink DPCCH is rapidly decreased. ;

Or,

Optionally, the method further includes:

Sending, by the micro station, an Id measurement report to the RNC by using the micro station, so that the RNC ignores the Id measurement report; or

The UE receives the radio resource control RRC signaling sent by the RNC through the micro station, and stops the Id event measurement and reporting according to the RRC signaling.

As shown in FIG. 4, for the DPA transmission timing diagram of the soft handover area after the introduction of the ABS, referring to FIG. 4, the subframes of the macro station are respectively ABS and non-ABS, and the macro station does not transmit downlink data in the ABS, and the macro station in the non-ABS The downlink data is transmitted. In FIG. 4, the macro station transmits downlink data by padding, and the non-transmission downlink data is indicated by blank. The downlink signals transmitted by the micro station include a Common Pilot Channel (CPICH), a High Speed Shared Control Channel (HS_SCCH), and a High Speed Physical Downlink Shared Channel (HS-PDSCH). And the Dedicated Physical Control Channel (DPCCH), as shown in Figure 4, the HS-SCCH and HS-PDSCH will be sent in the ABS. It can be understood that since the CPICH and the DL-DPCH belong to the control signal, the transmission needs to be throughout the entire transmission period, and therefore, it can also be in the non-ABS. Send on. In addition, the above-mentioned macro station and downlink data transmitted by the micro station may refer to data that does not need to run through the entire transmission period, for example, HS-SCCH and HS-PDSCH.

On the UE side, after the delay ^, the UE can receive the HS-PDSCH and the DL-DPCH sent by the micro-station. It can be understood that the UE also receives the HS-SCCH sent by the micro-station, but in FIG. 4 show. In addition, the UE side also sends an uplink signal to the micro station, where the uplink signal includes an uplink dedicated physical channel.

(Upl ink Dedicated Physical Channel, UL-DPCH) and feedback information, the feedback information includes Acknowledgement/Negat ive-acknowledgement (ACK/NACK) information and Channel Quality Indicator (CQI).

After the delay signal is sent by the UE, the uplink signal can reach the micro station, and the micro station can send the next HS-SCCH and HS-PDSCH according to the feedback information.

In this embodiment, when the UE enters the soft handover area, it determines that the serving cell is a micro cell, and can enable the UE to send uplink data that needs to be sent to the serving cell to the micro cell, because the uplink signal receiving quality of the micro station is stronger than that of the macro station. The signal receiving quality can improve the transmission efficiency of the uplink data. In addition, in this embodiment, by configuring the information of the ABS, the macro station does not transmit data or reduce the power transmission data on the ABS, and the micro station transmits data according to the normal power of the ABS. Avoid strong interference from the macro station to the micro station and improve the transmission efficiency of downlink data. Therefore, by the above processing, data transmission efficiency can be improved and communication quality can be improved.

5 is a schematic flowchart of a communication method of a soft handover area in another heterogeneous network according to an embodiment of the present invention. The heterogeneous network in this embodiment includes a macro station and a micro station, and the macro station does not send data on the ABS. In this embodiment, the UE moves from a macro station to a micro station as an example. This embodiment includes:

501: The UE performs the same frequency measurement according to the measurement control message given by the RNC. When the UE finds that the radio signal quality of a co-frequency cell becomes good and enters the reporting range of the RNC, the UE reports the measurement report to the RNC.

502: After receiving the measurement report reported by the UE, the RNC determines whether the UE needs to perform soft handover according to the load of the target cell.

The specific content of the above 50 502 can adopt the corresponding process of the existing soft handover.

503: When determining that the UE needs to perform soft handover, the RNC configures the information of the ABS, and switches the serving cell of the UE from the macro cell to the micro cell, and adds new radio link information to the UE. In addition, the process can be ended when it is judged that the UE does not need to perform soft handover.

Different from the prior art, in this embodiment, when the UE needs to perform soft handover, the information of the ABS is configured, and the handover of the serving cell is performed immediately. 504: The RNC sends a message requesting to configure a new radio link to the micro station, and allocates radio resources to the micro station.

505: The RNC sends ABS information to the macro station and the micro station respectively.

506: The RNC sends update information to the UE to instruct the UE to perform an active set update, where the update information includes not only a scrambling code used by the new radio link, a channel code, and a frame configuration of the physical channel, which is different from the prior art. The information of the ABS of the macro station and the serving cell ID are to be included, where the serving cell ID refers to the identifier of the micro station.

507: The UE starts to use the new radio link according to the update information, adds the new radio link to the active set, and sets the micro station as the serving base station, and communicates with the macro station and the micro station according to the information of the ABS.

508: When the UE uses the new radio link, the uplink DPCCHo is sent by using a predetermined power hopping value.

The value of the power hopping value is that the value of the power hopping value when the uplink DPCCH is transmitted is greater than the value of the current power 歩, for example, the current ldB is 歩, and the power hopping value in this embodiment may be 5 dB. The value can be configured. By using the power hopping value, the target value of the switched serving cell can be more quickly satisfied when the serving cell switches. In this embodiment, since the macro station is switched from the macro station to the micro station, the uplink power received by the micro station is getting stronger and stronger, and the uplink transmission power of the UE can be reduced during power control. Therefore, the transmit power value of the uplink DPCCH is sent a certain time. The power hopping value will be reduced compared to the last transmitted transmit power value of the uplink DPCCH.

509: The micro station performs power control according to the power control command word reported by the UE.

The power control command word may refer to a TPC, and the micro station may increase or decrease the transmit power value of the downlink DPCCH according to the TPC.

The UE can obtain the TPC according to the comparison result by comparing the received value with the target value. For example, when the received value is larger than the target value, the TPC indicating that the transmit power is reduced may be obtained, or when the received value is smaller than the target value, the indication may be increased. TPC.

In the ABS interval, since the macro station does not interfere, the comparison value may be SINR, that is, the received value refers to the SINR value when the downlink DPCCH is received, and the above target value refers to the target of the preset SINR. value. If the received value is greater than the target value, a TPC for instructing the micro station to reduce the downlink transmit power may be generated, and if the received value is less than the target value, a TPC for instructing the micro station to increase the downlink transmit power may be generated.

In the non-ABS interval, the SINR value will be affected by the macro station due to interference from the macro station. The value of the comparison may be the absolute power of the pilot in the downlink DPCCH, that is, the received value refers to the absolute power of the downlink DPCCH when the downlink DPCCH is received, and the target value refers to the target of the preset absolute power. value. If the received value is greater than the target value, a TPC may be generated to instruct the micro station to reduce the downlink transmit power, and if the received value is less than the target value, a TPC may be generated to instruct the micro station to increase the downlink transmit power.

510: The RNC ignores the Id measurement report reported by the UE, or the RNC sends the RRC signaling to the UE to indicate that the UE stops reporting the Id measurement report.

The Id measurement report is sent to the RNC after the UE updates the serving cell. For example, referring to FIG. 1, in the prior art, when the UE moves from the macro station to the micro station to enter the ring line 13, the UE reports the Id measurement report to the RNC. However, since the serving cell update is performed when the UE enters the soft handover area, the RNC may ignore the Id measurement report, and may specifically discard or instruct the UE to stop sending the Id measurement report.

It can be understood that the RNC discarding the Id measurement report may mean that the RNC receives the Id measurement report but does not process according to the Id measurement report, that is, does not perform the serving cell update according to the Id measurement report.

511: When receiving the lb measurement report sent by the UE, the RNC keeps the serving cell as a micro cell, and then exits the soft handover.

The lb measurement report is sent after the UE detects the downlink received power difference of the base station to a preset value. When the RNC receives the lb measurement report, the RNC sets the cell with stronger downlink receiving power of the UE as the serving cell. In this embodiment, the UE moves from the macro station to the micro station. Therefore, the lb measurement report is sent when the UE detects the downlink signal difference sent by the macro station to a set degree. For example, when the UE sends the ring line 141, the UE The cell with stronger downlink downlink receiving power is a micro cell. Therefore, the serving cell set after the RNC receives the lb measurement report is a micro cell, or the serving base station is a micro station, and the serving cell has been switched when the UE enters the soft handover area before. It is a microcell, so it belongs to the microcell.

In this embodiment, when the UE enters the soft handover area, the serving cell handover is performed, which can improve the efficiency of data transmission and expand the coverage of the micro station. By using the hopping manner to change the uplink transmit power of the UE, the power generated by the uplink DPCCH can be avoided. Loss or interference; By comparing the absolute power of the downlink DPCCH in the non-ABS interval, the power boost of the unnecessary DPCCH of the micro station can be reduced, and the downlink transmission power of the micro station can be reduced.

FIG. 6 is a schematic flowchart of a communication method of a soft handover area in another heterogeneous network according to an embodiment of the present invention. The heterogeneous network in this embodiment includes a macro station and a micro station, and the macro station does not send data on the ABS. In this embodiment, the UE moves from the micro station to the macro station as an example. This embodiment includes:

601: The UE performs the same frequency measurement according to the measurement control message given by the RNC. When the UE finds that the radio signal quality of a co-frequency cell becomes good and enters the reporting range of the RNC, the UE reports the measurement report to the RNC.

602: After receiving the measurement report reported by the UE, the RNC determines whether the UE needs to perform soft handover according to the load of the target cell.

603: When determining that the UE needs to perform soft handover, the RNC configures the information of the ABS, keeps the serving cell of the UE as a micro cell, and adds new radio link information to the UE.

604: The RNC sends a message requesting to configure a new radio link to the micro station, and allocates a wireless resource to the micro station.

605: The RNC sends ABS information to the macro station and the micro station respectively.

606: The RNC sends the update information to the UE to instruct the UE to perform an active set update, where the update information includes not only the scrambling code used by the new radio link, the channel code, and the frame configuration of the physical channel, which is different from the prior art. The information of the ABS of the macro station and the serving cell ID are to be included, where the serving cell ID refers to the identifier of the micro station.

607: The UE starts to use the new radio link according to the update information, adds the new radio link to the active set, and sets the micro station as the serving base station, and communicates with the macro station and the micro station according to the information of the ABS.

608: The micro station performs power control according to the power control command word reported by the UE.

The power control command word may refer to a TPC, and the micro station may increase or decrease the downlink according to the TPC.

The transmit power value of the DPCCH.

In the non-ABS interval, the SINR value will be affected by the macro station, and the value of the comparison may be the absolute power of the pilot in the downlink DPCCH, that is, the above reception. The value refers to the absolute power of the downlink DPCCH when the downlink DPCCH is received, and the target value refers to the target value of the preset absolute power. If the received value is greater than the target value, a TPC may be generated to instruct the micro station to reduce the downlink transmit power, and if the received value is less than the target value, a TPC may be generated to instruct the micro station to increase the downlink transmit power.

609: The RNC ignores the Id measurement report reported by the UE, or the RNC sends the RRC signaling to the UE to instruct the UE to stop reporting the Id measurement report.

610: When receiving the lb measurement report sent by the UE, the RNC switches the serving cell from the micro cell to the macro cell, and instructs the UE to send the uplink DPCCH by using the power hopping value, and then exits the soft handover.

Different from the previous embodiment, since the embodiment moves from the micro station to the macro station, the lb measurement report sent by the UE is sent when the UE measures the downlink signal difference of the micro cell to a certain extent, for example, the UE is The ring line 142 transmits, at this time, the serving cell can be switched from the micro cell to the macro cell. Due to the serving cell handover, the UE may use the hopping mode to transmit the uplink DPCCH for fast convergence. The specific content may be related to the description in 508.

It can be understood that the specific content in 60 Guang 610 can be referred to the related description in 50 Guang 511. In this embodiment, when the UE is in the soft handover zone, the serving cell is a micro cell, which can improve the efficiency of data transmission and expand the coverage of the micro-station. By using the hopping mode to change the uplink transmit power of the UE, the power generated by the uplink DPCCH can be avoided. Loss or interference; By comparing the absolute power of the downlink DPCCH in the non-ABS interval, the power boost of the unnecessary DPCCH of the micro station can be reduced, and the downlink transmission power of the micro station can be reduced.

FIG. 7 is a schematic structural diagram of an RNC according to an embodiment of the present disclosure, where the RNC can be used for soft handover area communication in a heterogeneous network, where the heterogeneous network includes a micro station and a macro station, and the RNC 70 includes a processor 71 and sends The processor 71 is configured to: when detecting that the UE enters the soft handover area, determine the cell where the micro station is located as the serving cell of the UE, and configure an ABS for the macro cell station, where the heterogeneous network The micro cell and the macro cell are included, and the uplink signal receiving quality of the micro cell station to the UE is better than the uplink signal receiving quality of the macro cell station to the UE; and the transmitter 72 is configured to respectively send the micro cell to the micro cell. The first information is sent by the station, and the second information is sent to the macro cell station, where the first information is used to indicate that the micro cell station sends downlink data to the UE with normal power, the second information. And configured to indicate that the macro cell station does not send downlink data or reduce transmission power of downlink data on the ABS.

Optionally, the first information sent by the sender 72 is further used to:

Sending to the UE by the micro station, to indicate that the UE is on other subframes except the ABS, And obtaining, by the absolute power of the downlink dedicated physical channel DPCCH from the micro cell, the power control command word, where the power control command word is used to instruct the micro station to adjust downlink transmit power.

Optionally, referring to FIG. 8, the RNC 70 further includes a receiver 73, where the receiver 73 is configured to receive an Id measurement report reported by the UE by using the micro station, and the processor is further configured to receive the After receiving the Id measurement report, the Id measurement report is ignored; or

The transmitter 72 is further configured to send, by using the micro station, RRC signaling to the UE, where the RRC signaling is used to indicate that the UE stops Id event measurement and reporting.

Optionally, the processor 71 determines the cell where the micro station is located as the serving cell of the UE, and includes:

In the hardware implementation, the foregoing processor may be a central processing unit (CPU), a microprocessor, a single-chip microcomputer, etc., and the above-mentioned transmitter and receiver may be a whole, and may specifically be a transceiver. The RNC can also include a general-purpose component such as a memory, an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device. The embodiment of the present invention is not limited herein.

FIG. 9 is a schematic structural diagram of a UE according to an embodiment of the present invention. The UE may be used for soft handover area communication in a heterogeneous network, where the heterogeneous network includes a micro station and a macro station, and the UE 90 includes a transmitter 91 and receiving The transmitter 91 is configured to send a measurement report to the RNC, so that the RNC determines that the UE enters the soft handover area according to the measurement report, and determines that the cell where the micro station is located when determining that the UE enters the soft handover area For the serving cell of the UE, the heterogeneous network includes a micro cell and a macro cell, and the micro cell station has excellent uplink signal reception quality to the UE. And receiving, by the macro cell station, an uplink signal receiving quality of the UE; the receiver 92 is configured to receive information about the ABS sent by the RNC, and receive, according to the information of the ABS, the downlink sent by the micro cell station by normal power according to the information of the ABS. Data, and the downlink data sent by the macro cell station or the downlink data sent by the macro cell station is reduced on the ABS.

Optionally, referring to FIG. 10, the UE further includes:

The processor 93 is configured to obtain, according to the information about the ABS, a power control command word according to an absolute power of a DPCCH received from the micro station on other subframes except the ABS, where the power control command is received. The command word is used to instruct the micro station to adjust the downlink transmit power.

Optionally, the transmitter 91 is further configured to:

Optionally, the transmitter 91 is specifically configured to:

Optionally, the transmitter 91 is further configured to: send, by the micro station, an Id measurement report to the RNC, so that the RNC ignores the Id measurement report; or

The receiver 92 is further configured to: receive radio resource control RRC signaling sent by the RNC by using the micro station, to stop Id event measurement and reporting according to the RRC signaling.

In this embodiment, when the UE enters the soft handover area, it determines that the serving cell is a micro cell, and may enable the UE to send uplink data that needs to be sent to the serving cell to the micro cell, because the uplink information of the micro station The receiving quality of the number is stronger than the receiving quality of the uplink signal of the macro station, and the transmission efficiency of the uplink data can be improved. In addition, in this embodiment, by configuring the information of the ABS, the macro station does not transmit data or reduce the power to transmit data on the ABS, and the micro station The normal power transmission data on the ABS can avoid strong interference of the macro cell to the micro cell and improve the transmission efficiency of the downlink data. Therefore, by the above processing, data transmission efficiency can be improved and communication quality can be improved.

It will be apparent to those skilled in the art that, for convenience and brevity of description, only the division of each functional module described above is exemplified. In practical applications, the above-mentioned function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided herein, it should be understood that the disclosed systems, devices, and methods may be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be used. Combined or can be integrated into another system, or some features can be ignored, or not executed. Alternatively, the coupling or direct coupling or communication connection between the various components shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software function unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. , including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to execute the present application All or part of the steps of the method described in the examples. The foregoing storage medium includes: u disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and the like, which can store program code. .

The above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that The technical solutions described in the embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

Rights request

1. A communication method for soft handover area communication in a heterogeneous network. The heterogeneous network includes micro stations and macro stations, and is characterized in that it includes:

When it is detected that the user equipment UE enters the soft handover area, the cell where the micro station is located is determined as the serving cell of the UE, wherein the uplink signal reception quality of the micro station to the UE is better than that of the macro station. The uplink signal reception quality of the UE;

Configure almost blank subframe ABS for the macro station;

Send first information to the micro station and second information to the macro station respectively, where the first information is used to instruct the micro station to send downlink data to the UE with normal power on the ABS, The second information is used to instruct the macro station not to send downlink data on the ABS or to reduce the sending power of downlink data.

2. The method according to claim 1, characterized in that the first information is also used to: send to the UE through the micro station to indicate that the UE is on other subframes except ABS, A power control command word is obtained according to the absolute power of the downlink dedicated physical channel DPCCH from the micro station received on the other subframes, and the power control command word is used to instruct the micro station to adjust the downlink transmission power.

3. The method according to any one of claims 1 to 2, further comprising: after receiving the Id measurement report reported by the UE through the micro station, ignoring the Id measurement report; or,

Radio resource control RRC signaling is sent to the UE through the micro station, and the RRC signaling is used to instruct the UE to stop measuring and reporting Id events.

4. The method according to any one of claims 1 to 3, characterized in that determining the cell where the micro station is located as the serving cell of the UE includes:

If the serving cell of the UE before entering the soft handover area is the cell where the micro station is located, then it is determined that the serving cell is the cell where the micro station is located after entering the soft handover area; or,

If the serving cell of the UE before entering the soft handover area is the cell where the macro station is located, it is determined that after entering the soft handover area, the serving cell is switched from the cell where the macro station is located to the cell where the micro station is located.

5. A communication method used for soft handover area communication in a heterogeneous network. The heterogeneous network includes micro stations and macro stations, and is characterized in that it includes:

Send a measurement report to the radio network controller RNC, so that the RNC determines that the UE enters the soft handover area based on the measurement report, and when it determines that the UE enters the soft handover area, The cell where the micro station is located is determined to be the serving cell of the UE, wherein the uplink signal reception quality of the micro station to the UE is better than the uplink signal reception quality of the macro station to the UE;

Receive the information of the almost blank subframe ABS sent by the RNC, receive the downlink data sent by the micro station with normal power on the ABS according to the information of the ABS, and there is no downlink data sent by the macro station on the ABS or the downlink data is the The macro station reduces the power to send downlink data.

6. The method according to claim 5, further comprising:

According to the information of the ABS on other subframes except the ABS, the power control command word is obtained according to the absolute power of the downlink dedicated physical channel DPCCH from the micro station received on the other subframe, and the power control command is The word is used to instruct the micro station to adjust the downlink transmit power.

7. The method according to claim 5 or 6, further comprising:

When the serving cell changes, the uplink DPCCH is transmitted according to a predetermined power jump value, and the absolute value of the power jump value is greater than the step length value when the UE performs power control on the uplink DPCCH.

8. The method according to claim 7, characterized in that,

When the serving cell of the UE is switched from the cell where the macro station is located to the cell where the micro station is located, the power jump value is a downward jump, so that the transmit power of the uplink DPCCH is quickly reduced; or,

When the serving cell of the UE is switched from the cell where the micro station is located to the cell where the macro station is located, the power jump value is an upward jump, causing the transmit power of the uplink DPCCH to increase rapidly.

9. The method according to any one of claims 5 to 8, further comprising: sending an Id measurement report to the RNC through the micro station, so that the RNC ignores the Id measurement report; or,

Receive radio resource control RRC signaling sent by the RNC through the micro station, and stop Id event measurement and reporting according to the RRC signaling.

10. A wireless network controller RNC, used for soft handover area communication in a heterogeneous network. The heterogeneous network includes micro stations and macro stations, and is characterized in that it includes:

The processor is configured to determine the cell where the micro station is located as the serving cell of the UE when it is detected that the user equipment UE enters the soft handover area, and configure an almost blank subframe ABS for the macro station, wherein the The uplink signal reception quality of the micro station to the UE is better than the uplink signal reception quality of the macro station to the UE;

A transmitter, configured to send the first information to the micro station and the second information to the macro station respectively. information, the first information is used to instruct the micro station to send downlink data to the UE with normal power on the ABS, and the second information is used to instruct the macro station not to send downlink data or reduce the downlink speed on the ABS. Data transmission power.

11. The RNC according to claim 10, wherein the first information sent by the transmitter is also used for:

is sent to the UE through the micro station to indicate that the UE is on other subframes except ABS, and is obtained based on the absolute power of the downlink dedicated physical channel DPCCH received from the micro station on the other subframes. Power control command word, the power control command word is used to instruct the micro station to adjust the downlink transmission power.

12. The RNC according to claim 10 or 11, characterized in that,

The RNC further includes a receiver, the receiver is configured to receive the Id measurement report reported by the UE through the micro station, and the processor is further configured to ignore the Id measurement report after the receiver receives the Id measurement report. the Id measurement report; or,

The transmitter is also configured to send radio resource control RRC signaling to the UE through the micro station, where the RRC signaling is used to instruct the UE to stop measuring and reporting Id events.

13. The RNC according to any one of claims 10 to 12, characterized in that the processor determines the cell where the micro station is located as the serving cell of the UE, including:

14. A user equipment UE, used for soft handover area communication in a heterogeneous network. The heterogeneous network includes micro stations and macro stations, and is characterized in that it includes:

A transmitter configured to send a measurement report to the radio network controller RNC, so that the RNC determines that the UE enters the soft handover area based on the measurement report, and when determining that the UE enters the soft handover area, transfers the cell where the micro station is located Determined to be the serving cell of the UE, wherein the uplink signal reception quality of the micro station to the UE is better than the uplink signal reception quality of the macro station to the UE;

Receiver, configured to receive the information of the almost blank subframe ABS sent by the RNC, receive the downlink data sent by the micro station at normal power on the ABS according to the information of the ABS, and there is no downlink data sent by the macro station on the ABS. data or downlink data sent by the macro station with reduced power.

15. The UE according to claim 14, further comprising: A processor configured to obtain a power control command word based on the absolute power of the downlink dedicated physical channel DPCCH from the micro station received on other subframes except the ABS according to the ABS information, The power control command word is used to instruct the micro station to adjust the downlink transmission power.

16. The UE according to claim 14 or 15, characterized in that the transmitter is further configured to: when the serving cell changes, transmit the uplink DPCCH according to a predetermined power hopping value, the power hopping value The absolute value of is greater than the step length value when the UE performs power control on the uplink DPCCH.

17. The UE according to claim 16, wherein the transmitter is specifically configured to: when the serving cell of the UE is switched from the cell where the macro station is located to the cell where the micro station is located, according to the predetermined The uplink DPCCH is transmitted with a power jump value, the absolute value of the power jump value is greater than the step length value when the UE performs power control on the uplink DPCCH, and the power jump value is a downward jump, such that The transmit power of the uplink DPCCH is rapidly reduced; or,

When the serving cell of the UE is switched from the cell where the micro station is located to the cell where the macro station is located, the uplink DPCCH is transmitted according to the predetermined power hopping value, and the absolute value of the power hopping value is greater than the UE's The step length value when the uplink DPCCH performs power control, and the power jump value is an upward jump, so that the transmit power of the uplink DPCCH increases rapidly.

18. The UE according to any one of claims 14 to 17, characterized in that,

The transmitter is also configured to: send an Id measurement report to the RNC through the micro station, so that the RNC ignores the Id measurement report; or,

The receiver is also used to: receive radio resource control sent by the RNC through the micro station

RRC signaling, so as to stop Id event measurement and reporting according to the RRC signaling.