WO2014101071A1

WO2014101071A1 - Switching method and device

Info

Publication number: WO2014101071A1
Application number: PCT/CN2012/087744
Authority: WO
Inventors: 黄鑫; 吴贤斌; 戴丁樟
Original assignee: 华为技术有限公司
Priority date: 2012-12-27
Filing date: 2012-12-27
Publication date: 2014-07-03
Also published as: CN103299681A; CN103299681B

Abstract

Provided are a switching method and device, which can improve the throughput rate of downlink data transmission. The method comprises: acquiring description information about channel quality of an uplink high speed dedicated physical control channel (HS-DPCCH) in a serving cell of a user equipment (UE) (101); determining that the channel quality of the HS-DPCCH meets a first preset condition according to the description information about channel quality (102); and switching the serving cell of the UE to a target cell, the channel quality of the HS-DPCCH of the target cell and a downlink channel meeting a second preset condition (103).

Description

Switching method and device

The present invention relates to the field of communications technologies, and in particular, to a handover method and device. Background technique

In the High Speed Downlink Packet Access (HSDPA) technology, the base station passes a High Speed Shared Control Channel (HS-SCCH) in a Transmission Time Interval (TTI). Transmitting signaling information to the UE, where the signaling information may include a user equipment (UE) identifier, a data block size sent to the UE, a modulation scheme used, and the like, and a high-speed physical downlink shared channel (High-Speed Physical Downlink Shared Channel, HS-PDSCH) transmits the data block to the UE. The UE scouts the UE identifier sent by the HS-SCCH in each TTI, so as to determine whether the data block sent on the corresponding HS-PDSCH in the TTI belongs to itself, and if yes, starts receiving on the HS-PDSCH. The transmitted data block, if not, does not respond.

Then, if the UE successfully receives the data block, the ACK is fed back to the base station by using an Uplink high speed dedicated physical control channel (HS-DPCCH), so that the base station continues to transmit the next data block, if the UE receives If the data block fails, the NACK is fed back to the base station through the HS-DPCCH, so that the base station retransmits the data block. The UE may also measure the channel quality of the HS-PDSCH, and obtain a channel quality indicator (CQI), and report the CQI to the base station through the HS-DPCCH.

If the UE moves from the current serving cell to another cell and moves to the intersection of the two cells, the downlink signal quality received by the UE from the two cells may be equal, and the switching of the serving cell is not triggered at this time.

However, at this time, the uplink received signal to noise ratio of the UE to the serving cell may be much worse than that of the non-serving cell, for example, the serving cell has a pilot transmission power greater than 6 dB than the non-serving cell, or the receiving antenna of the non-serving cell is smaller than the serving cell. More than 3 (such as service The cell is one antenna, the non-serving cell is four antennas, or the uplink wideband receive power (RTWP) of the serving cell is higher than the non-serving cell by more than 6 dB. The consequence of this is that the uplink and the non-serving cell have a "long and short leg" effect, that is, the uplink DPCCH signal-to-noise ratio of the serving cell is very poor, and the received signal-to-noise ratio of the HS-DPCCH demodulated only in the serving cell is also low. Therefore, the UE feeds back the ACK (or NACK or CQI) to the base station in the serving cell through the HS-DPCCH, which is prone to demodulation failure, thereby causing downlink data transmission delay or even no data transmission, and reducing the downlink data transmission throughput rate.

Summary of the invention

The present invention provides a handover method and apparatus, which can improve downlink data transmission throughput.

In order to achieve the above object, the present invention adopts the following technical solutions:

In a first aspect, a handover method is provided, including:

Obtaining channel quality description information of the uplink high-speed dedicated physical control channel HS-DPCCH in the serving cell of the user equipment UE;

Determining, according to the channel quality description information, that a channel quality of the HS-DPCCH meets a first preset condition;

The serving cell of the UE is switched to the target cell, and the channel quality and the downlink channel of the HS-DPCCH of the target cell satisfy the second preset condition.

With reference to the first aspect, in a first implementation manner of the first aspect, the obtaining the channel quality description information of the HS-DPCCH in the serving cell of the user equipment UE includes: receiving a correct response ACK/negative acknowledgement NACK sent by the base station Obtaining a leak detection probability of the channel quality description information of the HS-DPCCH in the serving cell of the UE, where the PDCCH/N ACK leakage detection probability is that the base station does not receive the HS-DPCCH within a preset time period a ratio of the number of ACK/NACKs received to the number of times the base station sends scheduling information to the UE by using the downlink high-speed shared control channel HS-SCCH in the preset time period, where the scheduling information is to notify the UE that the Setting a transmission time interval TTI to send a data block to the UE through a high-speed physical downlink shared channel HS-PDSCH; Or, obtaining channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving an unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the HS in the serving cell of the UE is obtained by receiving a missed detection probability of a correct response ACK/negative acknowledgement NACK sent by the base station. Determining, according to the channel quality description information, that the channel quality of the HS-DPCCH meets the first preset condition according to the channel quality description information of the DPCCH includes:

Determining whether the leakage detection probability of the ACK/NACK is greater than the first preset threshold, and determining that the channel quality of the HS-DPCCH meets the first when the leakage detection probability of the ACK/NACK is greater than the first preset threshold Preset condition

Or the determining, according to the channel quality description information, the channel quality description information of the HS-DPCCH in the serving cell of the UE when the channel quality description information of the HS-DPCCH in the serving cell of the UE is obtained by receiving an unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station The channel quality of the HS-DPCCH meets the first preset condition, and specifically includes:

Determining whether the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold, and determining that the channel quality of the HS-DPCCH is satisfied when the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold The first preset condition.

With reference to the first aspect, in a third implementation manner of the first aspect, the acquiring the channel quality description information of the HS-DPCCH in the serving cell of the user equipment UE includes: directly indicating, by the receiving base station, the HS-DPCCH The channel quality description information satisfies the channel quality description information of the first preset condition, where the channel quality description information is used by the base station when the PDCCH/NACK leak detection probability is greater than the first preset threshold, or the HS-DPCCH CQI The unreliable probability is greater than the second preset threshold when sent;

The leak detection probability of the ACK/NACK is that the number of ACK/NACKs that the base station does not receive from the HS-DPCCH in the preset time period and the base station pass the downlink in the preset time period. And a ratio of the number of times the high-speed shared control channel HS-SCCH sends the scheduling information to the UE, where the scheduling information is used to notify the UE to send to the UE by using the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI. data block.

In a second aspect, a switching device is provided, including:

An obtaining module, configured to acquire channel quality description information of an uplink high-speed dedicated physical control channel HS-DPCCH in a serving cell of the user equipment UE;

a determining module, configured to determine the content according to the channel quality description information

The channel quality of the HS-DPCCH satisfies the first preset condition;

a switching module, configured to: when the determining module determines that the channel quality meets the first preset condition, switch a serving cell of the UE to a target cell, and perform channel quality and downlink of the HS-DPCCH of the target cell The channel satisfies the second preset condition.

With reference to the second aspect, in a first implementation manner of the second aspect, the acquiring module is specifically configured to acquire an HS in a serving cell of the UE by receiving a missed detection probability of a correct response ACK/negative acknowledgement NACK sent by the base station a channel quality description information of the DPCCH, where the PDCCH/NACK leakage detection probability is that the number of ACK/NACKs that the base station does not receive from the HS-DPCCH within a preset time period and the base station are in the The ratio of the number of times the scheduling information is sent to the UE by the downlink high-speed shared control channel HS-SCCH in the preset time period, where the scheduling information is used to notify the UE to pass the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI. Transmitting a data block to the UE;

Or the acquiring module is specifically configured to obtain channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving an unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

With reference to the first implementation manner of the second aspect, in a second implementation manner of the second aspect, the determining module is specifically configured to determine whether a PDCCH/NACK leak detection probability is greater than a first preset threshold, and Determining that a channel quality of the HS-DPCCH meets the first preset condition when a PDCCH/NACK leak detection probability is greater than a first preset threshold;

Or the determining module is specifically configured to determine whether the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold, when the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold, Determining the channel quality of the HS-DPCCH The first preset condition is met.

With reference to the second aspect, in a third implementation manner of the second aspect, the acquiring module is configured to receive, by the receiving base station, a channel that directly indicates that the channel quality of the HS-DPCCH meets the first preset condition. Quality description information, where the channel quality description information is sent by the base station when the ACK/NACK leak detection probability is greater than the first preset threshold, or when the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset threshold; The leakage detection probability of the ACK/NACK is that the number of ACK/NACKs that the base station does not receive from the HS-DPCCH in the preset time period and the base station pass the downlink high speed in the preset time period. The ratio of the number of times the shared control channel HS-SCCH sends the scheduling information to the UE. The scheduling information is to notify the UE to send a data block to the UE through the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI.

In a third aspect, a switching device is provided, including:

a receiver, configured to acquire channel quality description information of an uplink high-speed dedicated physical control channel HS-DPCCH in a serving cell of the user equipment UE;

a processor, configured to determine, according to the channel quality description information, that a channel quality of the HS-DPCCH meets a first preset condition;

The processor is further configured to: when determining that the channel quality meets the first preset condition, handover a serving cell of the UE to a target cell, a channel quality of the HS-DPCCH of the target cell, and a downlink channel The second preset condition is met.

With reference to the third aspect, in a first implementation manner of the third aspect, the receiver is configured to acquire an HS in a serving cell of the UE by receiving a missed detection probability of a correct response ACK/negative acknowledgement NACK sent by the base station. a channel quality description information of the DPCCH, where the PDCCH/NACK leakage detection probability is that the number of ACK/NACKs that the base station does not receive from the HS-DPCCH within a preset time period and the base station are in the The ratio of the number of times the scheduling information is sent to the UE by the downlink high-speed shared control channel HS-SCCH in the preset time period, where the scheduling information is used to notify the UE to pass the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI. Transmitting a data block to the UE; Or the receiver is specifically configured to obtain channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving an unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

With reference to the first implementation manner of the third aspect, in a second implementation manner of the third aspect, the processor is specifically configured to determine whether a PDCCH/NACK leak detection probability is greater than a first preset threshold, and Determining that a channel quality of the HS-DPCCH meets the first preset condition when a PDCCH/NACK leak detection probability is greater than a first preset threshold;

Or the processor is specifically configured to determine whether the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold. When the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold, Determining that the channel quality of the HS-DPCCH satisfies the first preset condition.

With reference to the third aspect, in a third implementation manner of the third aspect, the receiver is configured to receive, by the receiving base station, a channel that directly indicates that the channel quality of the HS-DPCCH meets the first preset condition. a quality description information, where the channel quality description information is sent by the base station when the ACK/NACK leak detection probability is greater than the first preset threshold, or when the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset threshold;

The leak detection probability of the ACK/NACK is that the number of ACK/NACKs that the base station does not receive from the HS-DPCCH in the preset time period and the base station pass the downlink in the preset time period. The ratio of the number of times the high-speed shared control channel HS-SCCH sends the scheduling information to the UE. The scheduling information is used to notify the UE to send a data block to the UE through the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI. The channel quality description information of the HS-DPCCH in the serving cell of the UE may be obtained by using the foregoing technical solution, and determining, according to the channel quality description information, that the channel quality of the HS-DPCCH meets the first preset condition (ie, When the channel quality of the HS-DPCCH is poor, the serving cell of the UE is switched to the target cell. The channel quality and the downlink channel of the HS-DPCCH of the target cell satisfy the second preset The condition that the channel quality of the HS-DPCCH of the target cell and the channel quality of the downlink channel can meet the communication requirement of the UE, and thus the transmission throughput rate of the downlink data of the UE can be guaranteed.

In particular, when there is a situation in which the uplink channel quality is long and short legs (that is, the uplink channel quality of the serving cell is poor and the downlink channel quality is good), for example, when the UE moves from the serving cell to another cell, it moves to the intersection area of the two cells. The channel quality of the HS-DPCCH in the serving cell is degraded. However, when the quality of the downlink signal received by the UE is equal, the serving cell can be handed over to the target cell by using the method provided by the embodiment of the present invention. Compared with the prior art, the downlink data transmission throughput rate is low compared to the prior art, and the embodiment of the present invention can improve the downlink data transmission throughput rate.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in the drawings Other drawings may be obtained from these drawings without paying creative labor.

FIG. 1 is a flowchart of a handover method according to an embodiment of the present invention;

2 is a structural diagram of a switching device according to an embodiment of the present invention;

FIG. 3 is another structural diagram of a switching device according to an embodiment of the present invention.

detailed description

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. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all 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.

The embodiment of the present invention provides a handover method. If a UE moves from a current serving cell to a target cell and moves to an intersection region of the two cells, the downlink signal quality received by the UE from the two cells is equivalent, that is, downlink. The channel quality of the channel is better, but when the channel quality of the serving cell uplink channel is poor, the UE can be implemented. The serving cell switches to the target cell, and the channel quality of the uplink channel and the downlink channel of the target cell are both good, which can meet the communication requirement of the UE.

As shown in FIG. 1, a handover method is described in detail. The method is implemented as a radio network controller (RNC). The method includes: 101. The RNC acquires an uplink high-speed dedicated physics in a serving cell of the user equipment UE. Channel quality description information of the control channel HS-DPCCH.

This step can be implemented in the following ways:

Manner 1: The RNC obtains the channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving the missed detection probability of the correct acknowledgement ACK/negative acknowledgement NACK sent by the base station.

The leak detection probability of the ACK/NACK is that the number of ACK/NACKs that the base station does not receive from the HS-DPCCH in the preset time period and the base station pass the downlink in the preset time period. The ratio of the number of times the high-speed shared control channel HS-SCCH sends the scheduling information to the UE. The scheduling information is used to notify the UE to send a data block to the UE through the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI.

For example, the base station may send scheduling information to the UE through the HS-SCCH in a preset time period, and if the UE successfully receives the data block from the HS-PDSCH in the preset TTI indicated by the scheduling information, the preset TTI The ACK is sent to the base station through the HS-DPCCH. If the data block is received from the HS-PDSCH in the preset TTI, the NACK is sent to the base station through the HS-DPCCH in the preset TTI.

The base station may count the number of ACK/NACKs received from the HS-DPCCH in the preset time period and the number of times the scheduling information is sent to the UE by using the HS-SCCH in the preset time period, where The difference between the number of times the scheduling information is sent to the UE by the HS-SCCH in the preset time period and the number of ACK/NACKs received from the HS-DPCCH in the preset time period is the preset time. The number of ACK/NACKs not received from the HS-DPCCH in the segment.

Thereafter, the base station calculates a leak detection probability of the ACK/NACK, and may periodically send the ACK/NACK leak detection probability to the RNC. Manner 2: The RNC acquires channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving an unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

The calculation process of the unreliable probability of the CQI of the HS-DPCCH is: The base station can perform channel quality measurement on the HS-DPCCH every certain period (for example, 2ms or 4ms), obtain the CQI value of the HS-DPCCH, and use the translation The code scoring technique determines whether the CQI value of the HS-DPCCH is reliable.

Afterwards, the base station counts the number of times that the CQI reliability determination result is unreliable in a plurality of cycles, and the ratio of the CQI reliability determination result to the unreliable number of times and the total number of CQI reliability determinations is the HS-DPCCH The unreliable probability of CQI.

The base station may periodically send an unreliable probability of the CQI of the HS-DPCCH to the base station.

Manner 3: The RNC receives the channel quality description information that is sent by the base station and directly indicates that the channel quality of the HS-DPCCH meets the first preset condition.

For example, the base station first calculates the leak detection probability of the ACK/NACK. For the specific calculation method, refer to the description in the foregoing mode 1. After the base station determines whether the ACK/NACK leak detection probability is greater than the first preset threshold, if the ACK/NACK leak detection probability is greater than the first preset threshold, the channel quality of the HS-DPCCH is indicated. After the first preset condition is met (that is, the channel quality is poor), the base station sends the channel quality description information to the RNC.

Or, for example, the base station first calculates an unreliable probability of the CQI of the HS-DPCCH. For the specific calculation method, refer to the description in the foregoing mode 2. After that, the base station determines

If the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset threshold, if the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset threshold, the channel quality of the HS-DPCCH satisfies the first pre-predetermined If the condition is set (that is, the channel quality is poor), the base station sends the channel quality description information to the RNC.

It should be noted that the value ranges of the first preset threshold and the second preset threshold may be, for example, 20%-80%. If the first preset threshold or the second preset threshold is set too small, the base station may frequently send the channel quality description letter to the RNC. Interest rate, which is easy to cause waste of channel resources, and also causes the RNC to easily trigger the change of the serving cell, and more service cell changes may cause signaling call drop. The earlier service cell change may be due to insufficient downlink quality of the non-serving cell. Good cause HSDPA throughput to drop. If the first preset threshold or the second preset threshold is set too large, the base station may be slow to judge the channel quality of the HS-DPCCH, and the later change of the serving cell may cause the HSDPA throughput rate to be seriously degraded or even dropped. The bottom (that is, the throughput rate is zero). Therefore, in actual application, the specific values of the first preset threshold or the second preset threshold need to properly solve the above two problems.

102. The RNC determines, according to the channel quality description information, that a channel quality of the HS-DPCCH meets the first preset condition.

When the step 101 is used in the first mode, the step is specifically performed as follows: determining whether the ACK/NACK leak detection probability is greater than the first preset threshold, when the ACK/NACK leak detection probability is greater than the first preset threshold And determining, that the channel quality of the HS-DPCCH meets the first preset condition (that is, the channel quality is poor).

When step 101 is used in the second mode, the step is specifically performed as follows: determining whether the unreliable probability of the CQI is greater than a second preset threshold. When the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset threshold, Determining that the channel quality of the HS-DPCCH satisfies the first preset condition (ie, the channel quality is poor).

When step 101 is used in mode 3, the step may determine, according to the channel quality description information, that the channel quality of the HS-DPCCH satisfies the first preset condition (that is, the channel quality is poor).

The RNC switches the serving cell of the UE to the target cell, and the channel quality and the downlink channel of the HS-DPCCH of the target cell meet the second preset condition, that is, the channel quality of the HS-DPCCH of the target cell. Both the channel quality of the downlink channel and the downlink channel can meet the communication requirements of the UE.

Among them, in the HSDPA technology, the uplink channel is HS-DPCCH, and the downlink channel includes HS-SCCH and HS-PDSCH. The process of selecting the target cell by the RNC is as follows: In the downlink channel direction, the RNC may send the chip-level receiving energy in the unit power density of the total receiving bandwidth of the cell to the UE ( Received energy per chip Divided by the power density in the band , Ec / NO ) (or Received Signal Code Power (RSCP)) measurement indication information, the UE receives the Ec/NO (or RSCP) measurement indication information, starts the cell The Ec/NO (or RSCP) measurement is performed, and the measured Ec/N0 (or RSCP) measurement values of the respective cells are transmitted to the RNC through the base station. After receiving the Ec/NO (or RSCP) measurement value of each cell, the RNC compares whether the measured value of each cell Ec/NO (or RSCP) is greater than the third threshold, if the measured value of Ec/NO (or RSCP) is greater than the first value. The three thresholds indicate that the HS-SCCH and HS-PDSCH (downlink channel) quality in the cell is very good.

In the direction of the uplink channel, the base station performs a signal to interference ratio (SIR) measurement, and if the obtained cell SIR measurement value is different from the preset SIR target value by less than the fourth preset threshold (for example, -3 dB), SIR error EVENT F Report A is sent to the RNC. Otherwise, if the obtained cell SIR measurement value is different from the preset SIR target value by not less than the fourth preset threshold, the base station sends an SIR error event to the RNC. F Report B (SIR error EVENT F Report B). The base station sends a SIR error to the RNC. The EVENT F Report B indicates that the DPCCH uplink channel of the cell is very good, so the channel quality of the HS-DPCCH (uplink channel) is also very good.

Thereafter, the RNC selects the measured value of Ec/NO (or RSCP) to be greater than the third threshold, and receives the cell of SIR error EVENT F Report B from the cell as the target cell.

In the embodiment of the present invention, the RNC may obtain the channel quality description information of the HS-DPCCH in the serving cell of the UE, and when determining, according to the channel quality description information, that the channel quality of the HS-DPCCH meets the first preset condition, The serving cell of the UE is handed over to the target cell. The channel quality of the HS-DPCCH of the target cell and the downlink channel satisfy the second preset condition, that is, the channel quality of the HS-DPCCH of the target cell and the channel quality of the downlink channel can satisfy the communication requirement of the UE, and thus The transmission throughput rate of the downlink data of the UE can be guaranteed.

Especially in the case of the uplink channel quality long leg (ie, the serving cell uplink channel) When the quality is poor and the downlink channel quality is good, for example, when the UE moves from the serving cell to another cell and moves to the intersection of the two cells, in the serving cell

The channel quality of the HS-DPCCH is degraded. However, when the quality of the downlink signals received by the UE from the two cells is equal, the RNC can also switch the serving cell to the target cell by using the method provided by the embodiment of the present invention. In the prior art, when the UE moves from the serving cell to another cell and moves to the intersection area of the two cells, the channel quality of the HS-DPCCH in the serving cell deteriorates, but the UE receives from the two cells. When the downlink signal quality is equal, the handover of the serving cell cannot be triggered, and the downlink data transmission throughput rate is low. Compared with the embodiment of the present invention, the downlink data transmission throughput rate can be improved.

As shown in FIG. 2, an embodiment of the present invention further provides a switching device, where the device is specifically an RNC, and the device includes:

The obtaining module 21 is configured to obtain channel quality description information of the uplink high-speed dedicated physical control channel HS-DPCCH in the serving cell of the user equipment UE;

The determining module 22 is configured to determine, according to the channel quality description information, that a channel quality of the HS-DPCCH meets the first preset condition;

The switching module 23 is configured to: when the determining module 22 determines that the channel quality meets the first preset condition, switch the serving cell of the UE to a target cell, and the channel quality of the HS-DPCCH of the target cell And the downlink channel satisfies the second preset condition, that is, the channel quality of the HS-DPCCH of the target cell and the channel quality of the downlink channel can satisfy the communication requirement of the UE.

For the function implementation process of the switching module, refer to the description of step 103 above. In the embodiment of the present invention, the RNC may obtain the channel quality description information of the HS-DPCCH in the serving cell of the UE, and determine, according to the channel quality description information, that the channel quality of the HS-DPCCH meets the first preset condition (also That is, when the channel quality of the HS-DPCCH is poor, the serving cell of the UE is switched to the target cell. The channel quality of the HS-DPCCH of the target cell and the downlink channel satisfy the second preset condition, that is, the channel quality of the HS-DPCCH of the target cell and the channel quality of the downlink channel can satisfy the communication requirement of the UE, and thus The transmission throughput rate of the downlink data of the UE can be guaranteed. In particular, when there is a situation in which the uplink channel quality is long and short legs (that is, the uplink channel quality of the serving cell is poor and the downlink channel quality is good), for example, when the UE moves from the serving cell to another cell, it moves to the intersection area of the two cells. In the service area

Further, the acquiring module 21 is specifically configured to obtain channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving a missed detection probability of the correct acknowledgement ACK/negative acknowledgement NACK sent by the base station.

For the specific calculation method of the ACK/NACK leakage detection probability, refer to the description of the mode one in the above step 101.

Correspondingly, the determining module 22 is specifically configured to determine whether the PDCCH/NACK leak detection probability is greater than the first preset threshold, and when the ACK/NACK leak detection probability is greater than the first preset threshold, determine The channel quality of the HS-DPCCH satisfies the first preset condition.

Further, the acquiring module 21 is specifically configured to obtain channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving an unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

Among them, the specific calculation method of the unreliable probability of the CQI of the HS-DPCCH can also be See the description of mode two in step 101 above.

Correspondingly, the determining module 22 is specifically configured to determine whether the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold, and the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset gate. The time limit is determined to determine that the channel quality of the HS-DPCCH meets the first preset condition.

Further, the acquiring module 21 is specifically configured to: by using the channel quality description information that is sent by the base station and directly indicating that the channel quality of the HS-DPCCH meets the first preset condition, where the channel quality description information is The base station sends when the ACK/NACK leak detection probability is greater than the first preset threshold, or when the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset threshold;

The leak detection probability of the ACK/NACK is that the number of ACK/NACKs that the base station does not receive from the HS-DPCCH in the preset time period and the base station pass the downlink in the preset time period. a ratio of the number of times the high-speed shared control channel HS-SCCH sends the scheduling information to the UE, and the scheduling information is used to notify the UE to send a data block to the UE through the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI;

Correspondingly, the determining module may specifically determine, according to the channel quality description information, that a channel quality of the HS-DPCCH meets the first preset condition. As shown in FIG. 3, an embodiment of the present invention provides a switching device, which is specifically an RNC, and includes: a receiver 31, a processor 32, a memory 33, a bus 3000, and a driving circuit 3001.

The receiver 31 is configured to acquire channel quality description information of the uplink high-speed dedicated physical control channel HS-DPCCH in the serving cell of the user equipment UE.

The processor 32 is configured to determine, according to the channel quality description information, that a channel quality of the HS-DPCCH meets a first preset condition;

The processor 32 is further configured to: when determining that the channel quality meets the first preset condition, handover a serving cell of the UE to a target cell, and perform channel quality and downlink of the HS-DPCCH of the target cell The channel satisfies a second predetermined condition, that is, the target The channel quality of the HS-DPCCH of the target cell and the channel quality of the downlink channel can satisfy the communication requirements of the UE.

The function implementation process of the processor 32 can also be referred to the description of steps 102 and 103 above.

It should be noted that the receiver 3 1 can be coupled to the antenna.

In a specific implementation, the memory 33 includes at least one or more of the following memory devices, a read only memory, a random access memory or a nonvolatile random access memory, and the memory provides instructions and data to the processor.

Wherein, the processor may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method may be completed by an integrated logic circuit of hardware in the processor or an instruction in a form of software. These instructions may be implemented and controlled by a processor therein for performing the methods disclosed in the embodiments of the present invention. The processor may also be a general purpose processor, a digital signal processing (DSP), an application specific integrated circuit, a Field Programmable Gate Array (FPGA) or other programmable logic. Devices, discrete gates or transistor logic devices, discrete hardware components.

The above general purpose processor may be a microprocessor or the processor may be any conventional processor, decoder or the like. The steps of the method disclosed in the embodiment of the present invention may be directly implemented as a hardware processor, or may be performed by a combination of hardware and software modules in the processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.

The driving circuit 3001 is used to provide driving for each hardware in the RNC so that each hardware can work normally.

In addition, the various hardware components of the RNC are coupled together by a bus system 3000, wherein the bus system 3000 includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as the bus system 3000 in FIG. In the embodiment of the present invention, the RNC may obtain the channel quality description information of the HS-DPCCH in the serving cell of the UE, and determine, according to the channel quality description information, that the channel quality of the HS-DPCCH meets the first preset condition (also That is, when the channel quality of the HS-DPCCH is poor, the serving cell of the UE is switched to the target cell. The channel quality of the HS-DPCCH of the target cell and the downlink channel satisfy the second preset condition, that is, the channel quality of the HS-DPCCH of the target cell and the channel quality of the downlink channel can satisfy the communication requirement of the UE, and thus The transmission throughput rate of the downlink data of the UE can be guaranteed.

In particular, when there is a situation in which the uplink channel quality is long and short legs (that is, the uplink channel quality of the serving cell is poor and the downlink channel quality is good), for example, when the UE moves from the serving cell to another cell, it moves to the intersection area of the two cells. The channel quality of the HS-DPCCH in the serving cell is degraded. However, when the quality of the downlink signal received by the UE is equal, the RNC can also switch the serving cell to the target cell by using the method provided by the embodiment of the present invention. In the prior art, when the UE moves from the serving cell to another cell and moves to the intersection area of the two cells, the channel quality of the HS-DPCCH in the serving cell deteriorates, but the UE receives from the two cells. When the downlink signal quality is equal, the handover of the serving cell cannot be triggered, and the downlink data transmission throughput rate is low. Compared with the embodiment of the present invention, the downlink data transmission throughput rate can be improved.

Further, the receiver 31 is specifically configured to acquire channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving a missed detection probability of a correct response ACK/negative acknowledgement NACK sent by the base station.

For the specific calculation method of the ACK/NACK leakage detection probability, refer to the description of the mode one in the above step 101. Correspondingly, the processor 32 is specifically configured to determine whether the PDCCH/NACK leak detection probability is greater than a first preset threshold, and when the ACK/NACK leak detection probability is greater than the first preset threshold, determine The channel quality of the HS-DPCCH meets the first preset condition;

Further, the receiver 31 is specifically configured to acquire channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving an unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

For the specific calculation method of the unreliable probability of the CQI of the HS-DPCCH, refer to the description of the second method in the above step 101.

Correspondingly, the processor 32 is specifically configured to determine whether the unreliable probability of the CQI of the HS-DPCCH is greater than a second preset threshold, and the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset gate. The time limit is determined to determine that the channel quality of the HS-DPCCH meets the first preset condition.

Further, the receiver 31 is configured to: by using a channel quality description information that is sent by the base station and directly indicating that the channel quality of the HS-DPCCH meets the first preset condition, where the channel quality description information is The base station sends when the ACK/NACK leak detection probability is greater than the first preset threshold, or when the unreliable probability of the CQI of the HS-DPCCH is greater than the second preset threshold;

Correspondingly, the processor 32 may specifically determine, according to the channel quality description information, that the channel quality of the HS-DPCCH meets the first preset condition. Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus necessary general hardware, and of course It can be done through hardware, but in many cases the former is a better implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a readable storage medium, such as a floppy disk of a computer. A hard disk or optical disk or the like includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

claims

1. A switching method, characterized by including:

Obtain the channel quality description information of the uplink high-speed dedicated physical control channel HS-DPCCH in the serving cell of the user equipment UE;

Determine that the channel quality of the HS-DPCCH meets the first preset condition according to the channel quality description information;

The serving cell of the UE is switched to the target cell, and the channel quality and downlink channel of the HS-DPCCH of the target cell satisfy the second preset condition.

2. The method according to claim 1, wherein the obtaining the channel quality description information of the HS-DPCCH in the serving cell of the user equipment UE specifically includes:

The channel quality description information of the HS-DPCCH in the serving cell of the UE is obtained by receiving the missed detection probability of the correct response ACK/negative response NACK sent by the base station, where the missed detection probability of the ACK/N ACK is the base station. The ratio of the number of ACK/NACKs not received from the HS-DPCCH within the preset time period and the number of times the base station sends scheduling information to the UE through the downlink high-speed shared control channel HS-SCCH within the preset time period. , the scheduling information is to notify the UE to send data blocks to the UE through the high-speed physical downlink shared channel HS-PDSCH at the preset transmission time interval TTI;

Alternatively, obtain the channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving the unreliability probability of the channel quality indication CQI of the HS-DPCCH sent by the base station.

3. The method according to claim 2, characterized in that,

When the channel quality description information of the HS-DPCCH in the serving cell of the UE is obtained by receiving the missed detection probability of the correct response ACK/negative response NACK sent by the base station, the HS-DPCCH is determined based on the channel quality description information The channel quality that meets the first preset condition specifically includes:

Determine whether the missed detection probability of the ACK/NACK is greater than a first preset threshold. When the missed detection probability of the ACK/NACK is greater than the first preset threshold, determine that the channel quality of the HS-DPCCH meets the first preset threshold. preset conditions;

Or, when receiving the channel quality indicator CQI of HS-DPCCH sent by the base station When obtaining the channel quality description information of HS-DPCCH in the serving cell of the UE with an unreliable probability, determining that the channel quality of the HS-DPCCH satisfies the first preset condition based on the channel quality description information specifically includes:

Determine whether the unreliability probability of the CQI of the HS-DPCCH is greater than a second preset threshold. When the unreliability probability of the CQI of the HS-DPCCH is greater than the second preset threshold, determine that the channel quality of the HS-DPCCH meets the first preset condition.

4. The method according to claim 1, wherein the obtaining the channel quality description information of the HS-DPCCH in the serving cell of the user equipment UE specifically includes:

By receiving the channel quality description information sent by the base station that directly indicates that the channel quality of the HS-DPCCH satisfies the first preset condition, the ACK/NACK missed detection probability of the channel quality description information by the base station is greater than the first It is sent when the threshold is preset, or when the unreliability probability of the CQI of HS-DPCCH is greater than the second preset threshold;

Wherein, the missed detection probability of the ACK/N ACK is the number of ACK/NACKs that the base station has not received from the HS-DPCCH within the preset time period and the number of ACK/NACKs that the base station has passed through within the preset time period. The ratio of the number of times the downlink shared control channel HS-SCCH sends scheduling information to the UE. The scheduling information is to notify the UE to send data blocks to the UE through the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI. .

5. A switching device, characterized by including:

An acquisition module, used to acquire the channel quality description information of the uplink high-speed dedicated physical control channel HS-DPCCH in the serving cell of the user equipment UE;

A determination module configured to determine, according to the channel quality description information, that the channel quality of the HS-DPCCH satisfies the first preset condition;

A switching module, configured to switch the serving cell of the UE to a target cell when the determining module determines that the channel quality satisfies the first preset condition, and the channel quality of the HS-DPCCH of the target cell and the downlink The channel satisfies the second preset condition.

6. The device according to claim 5, characterized in that,

The acquisition module is specifically configured to obtain the channel quality description information of HS-DPCCH in the serving cell of the UE by receiving the missed detection probability of the correct response ACK/negative response NACK sent by the base station, wherein the missed detection probability of the ACK/NACK The detection probability is The number of ACK/NACKs that the base station has not received from the HS-DPCCH within the preset time period and the number of times the base station has sent scheduling information to the UE through the downlink high-speed shared control channel HS-SCCH within the preset time period. The scheduling information is to notify the UE to send the data block to the UE through the high-speed physical downlink shared channel HS-PDSCH at the preset transmission time interval TTI;

Alternatively, the obtaining module is specifically configured to obtain the channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving the unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

7. The device according to claim 6, characterized in that the determination module is specifically used to determine whether the missed detection probability of the ACK/N ACK is greater than a first preset threshold, and when the ACK/NACK When the missed detection probability is greater than the first preset threshold, it is determined that the channel quality of the HS-DPCCH meets the first preset condition;

Or, the determination module is specifically configured to determine whether the unreliability probability of the CQI of the HS-DPCCH is greater than a second preset threshold. When the unreliability probability of the CQI of the HS-DPCCH is greater than the second preset threshold, It is determined that the channel quality of the HS-DPCCH meets the first preset condition.

8. The device according to claim 5, wherein the acquisition module is specifically configured to receive a channel quality description sent by a base station that directly indicates that the channel quality of the HS-DPCCH satisfies the first preset condition. Information, the channel quality description information is sent by the base station when the missed detection probability of ACK/NACK is greater than the first preset threshold, or when the unreliability probability of the CQI of HS-DPCCH is greater than the second preset threshold;

Wherein, the missed detection probability of ACK/NACK is the number of ACK/NACKs that the base station has not received from the HS-DPCCH within the preset time period and the number of downlink passes by the base station within the preset time period. The ratio of the number of times that the high-speed shared control channel HS-SCCH sends scheduling information to the UE. The scheduling information is to notify the UE to send data blocks to the UE through the high-speed physical downlink shared channel HS-PDSCH in the preset transmission time interval TTI.

9. A switching device, characterized by including:

A receiver, configured to obtain channel quality description information of the uplink high-speed dedicated physical control channel HS-DPCCH in the serving cell of the user equipment UE; A processor, configured to determine, according to the channel quality description information, that the channel quality of the HS-DPCCH satisfies the first preset condition;

The processor is also configured to switch the serving cell of the UE to a target cell when it is determined that the channel quality meets the first preset condition, and the channel quality of the HS-DPCCH of the target cell and the downlink channel The second preset condition is met.

10. The device according to claim 9, characterized in that,

The receiver is specifically configured to obtain the channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving the missed detection probability of the correct response ACK/negative response NACK sent by the base station, and the missed detection probability of the ACK/NACK The detection probability is the number of ACK/NACKs that the base station has not received from the HS-DPCCH within the preset time period and the number of ACKs/NACKs that the base station sends to the UE through the downlink high-speed shared control channel HS-SCCH within the preset time period. The ratio of the number of times that scheduling information is sent, which is used to notify the UE to send data blocks to the UE through the high-speed physical downlink shared channel HS-PDSCH at the preset transmission time interval TTI;

Or, the receiver is specifically configured to obtain the channel quality description information of the HS-DPCCH in the serving cell of the UE by receiving the unreliable probability of the channel quality indicator CQI of the HS-DPCCH sent by the base station.

11. The device according to claim 10, characterized in that the processor is specifically configured to determine whether the missed detection probability of the ACK/NACK is greater than a first preset threshold, and when the missed detection probability of the ACK/NACK When the detection probability is greater than the first preset threshold, it is determined that the channel quality of the HS-DPCCH meets the first preset condition;

Or, the processor is specifically configured to determine whether the unreliability probability of the CQI of the HS-DPCCH is greater than a second preset threshold. When the unreliability probability of the CQI of the HS-DPCCH is greater than the second preset threshold, It is determined that the channel quality of the HS-DPCCH meets the first preset condition.

12. The device according to claim 9, wherein the receiver is specifically configured to receive a channel quality description sent by a base station that directly indicates that the channel quality of the HS-DPCCH satisfies the first preset condition. information, the channel quality description information is provided by the base station when the missed detection probability of ACK/NACK is greater than the first preset threshold, or It is sent when the unreliability probability of the CQI of HS-DPCCH is greater than the second preset threshold; wherein, the missed detection probability of ACK/N ACK is when the base station does not receive ACK from the HS-DPCCH within a preset time period. /The ratio of the number of NACKs to the number of times the base station sends scheduling information to the UE through the downlink high-speed shared control channel HS-SCCH within the preset time period. The scheduling information is to notify the UE of the preset transmission time. The interval TTI sends data blocks to the UE through the high-speed physical downlink shared channel HS-PDSCH.