WO2013044521A1

WO2013044521A1 - Downlink measurement report obtaining method, device and system

Info

Publication number: WO2013044521A1
Application number: PCT/CN2011/080503
Authority: WO
Inventors: 陈先国; 廖军华
Original assignee: 华为技术有限公司
Priority date: 2011-09-30
Filing date: 2011-09-30
Publication date: 2013-04-04
Also published as: CN103141132A

Abstract

The present invention relates to the field of mobile communications. Disclosed are a downlink measurement report obtaining method, device and system, for promptly obtaining a downlink measurement report. The technical solution comprises: when a mobile terminal is required to transmit a downlink measurement report, requesting the mobile terminal to carry the downlink measurement report in an uplink radio link control (RLC) data block; receiving the uplink RLC data block transmitted by the mobile terminal, the uplink RLC data block carrying the downlink measurement report; obtaining the downlink quality measurement report according to the uplink RLC data block. The downlink measurement report obtaining method, device and system of the present invention can be applied in a GPRS/EGPRS system.

Description

Method, device and system for obtaining downlink measurement report

The present invention relates to the field of communications, and in particular, to a method, a device, and a system for acquiring a downlink measurement report. Background technique

The basic idea of packet downlink closed-loop power control is that the base station controller (BSC) determines the transmission power adjustment of the base station (Base Transceiver, BTS) based on the downlink quality report transmitted by the mobile station (MS). As shown in Figure 1, the specific process of grouping downlink closed loop power control is as follows:

The MS measures the reception level and link quality of each radio link control layer/media access control layer (RLC/MAC) radio block, forms a downlink quality measurement report and passes it. Correlated uplink RLC/MAC control messages, such as packet downlink acknowledgement/deny message (PACKET DO WNLINK ACK/NACK), are sent to the BSC;

Based on the downlink quality measurement report, the BSC calculates a power attenuation value of each downlink RLC/MAC radio block and transmits it to the BTS by using a certain packet downlink closed loop power control power algorithm. The inventors found that the prior art has at least the following Question:

The BSC determines the BST downlink transmit power adjustment according to the downlink quality measurement report carried in the related uplink RLC/MAC control message, and the related uplink RLC/MAC control message is periodically sent by the MS to the BSC, and does not reflect the current link. The quality status, the success of the control lag, led to the serious lag or even failure of the closed-loop closed-loop power control. Summary of the invention

Embodiments of the present invention provide a method, device, and system for acquiring a downlink measurement report, which implements real-time transmission of a downlink quality measurement report to a network side, and downlink RLC/MAC wireless The block performs differentiated power control.

In one aspect, a method for obtaining a downlink measurement report is provided, including: when a mobile terminal is required to send a downlink measurement report, requesting the mobile terminal to carry a downlink measurement report in uplink radio link control (RLC) data Receiving, in the block, an uplink RLC data block that is sent by the mobile terminal, where the uplink RLC data block carries the downlink measurement report; and acquiring the downlink quality measurement report according to the uplink RLC data block.

The apparatus for obtaining a downlink measurement report corresponding to the foregoing method, further includes: a first requesting unit, configured to: when the mobile terminal is required to send a downlink measurement report, request the mobile terminal to carry the downlink measurement report on the uplink a radio link control (RLC) data block; a first receiving unit, configured to receive an uplink RLC data block sent by the mobile terminal, where the uplink RLC data block carries the downlink measurement report;

And a first acquiring unit, configured to acquire the downlink quality measurement report according to the uplink RLC data block received by the first receiving unit.

In another aspect, a method for obtaining a downlink measurement report is provided, including: receiving, by a base station control device, a request for carrying a downlink measurement report in an uplink radio link control RLC data block; The road quality measurement report is carried in the uplink RLC data block and sent to the base station control device.

A mobile terminal corresponding to the foregoing method is further provided, including:

a second receiving unit, configured to receive a request sent by the base station control device to carry the downlink measurement report in the uplink radio link control RLC data block;

The first sending unit is configured to carry the downlink quality measurement report in an uplink RLC data block and send the signal to the base station control device.

In one aspect, a method for differential packet downlink power control is provided, including: receiving a downlink quality measurement report sent by a mobile terminal; calculating, according to the downlink measurement report and the current coding mode, a downlink data block corresponding to the downlink data block The first downlink power control parameter is calculated according to the downlink measurement report and the CS-1 coding mode, and the downlink air data control carrying the uplink state identifier (USF) is obtained. The second downlink power control parameter corresponding to the block is sent to the base station, where the first power control parameter, the second power control parameter, and the preset power attenuation value are sent, where the preset power attenuation value is used to control Carrying the power control of the USF's downlink null data control block.

And a device for providing a differentiated packet downlink power control corresponding to the foregoing method, including: a fourth receiving unit, configured to receive a downlink quality measurement report sent by the mobile terminal; and a first calculating unit, configured to perform, according to the downlink The link measurement report and the current coding mode calculate a first downlink power control parameter corresponding to the downlink data block;

a second calculating unit, configured to calculate, according to the downlink measurement report and the CS-1 coding mode, a second downlink power control parameter corresponding to the downlink null data control block carrying the uplink state identifier (USF); And transmitting, to the base station, the first power control parameter calculated by the first calculating unit, the second power control parameter calculated by the second calculating unit, and a preset power attenuation value, where the foregoing The set power attenuation value is used to control the power control of the downlink null data control block that does not carry the USF.

On the other hand, a method for initial packet downlink power control is provided, including: buffering a downlink power control parameter, and establishing an association between the downlink power control parameter and a temporary logical link identifier TLLI corresponding to the mobile terminal; The next time the packet access is initiated, the buffered downlink power control parameter is obtained according to the TLLI; if the downlink power control parameter is within the preset effective time period, the downlink power control parameter is transmitted as the downlink RLC/MAC radio block. The initial attenuation value of the power is sent to the base station.

An apparatus for initial packet downlink power control corresponding to the foregoing method is provided, including: a buffer establishing unit, configured to buffer a downlink power control parameter, and establish a temporary logical link corresponding to the mobile terminal and the downlink power control parameter Identify the association of the TLLI;

a second acquiring unit, configured to acquire a buffered downlink power control parameter according to the TLLI when the mobile terminal initiates a packet access next time;

And a third sending unit, configured to send the downlink power control parameter as an initial attenuation value of the downlink RLC/MAC radio block transmit power to the base station if the downlink power control parameter is within a preset effective time period. The present invention provides a method, device, and system for acquiring a downlink measurement report. When a base station control device requires a mobile terminal to send a downlink measurement report, the mobile terminal sends a downlink quality measurement report to the uplink RLC data block. The base station control device can return the downlink measurement report to the base station control device in time, so that the base station control device can determine whether the downlink transmit power of the base station needs to be adjusted in time, and solves the problem that the downlink quality measurement report is not sent in real time. The problem of power control lag, power control failure and so on. At the same time, a differentiated packet downlink power control method is also provided, which differently controls the transmission power of the downlink data block and the downlink null data control block, thereby minimizing the transmission power of the uplink null data control block, thereby reducing the transmission power. Downlink interference reduces the interference of the packet service to the voice service, significantly improves the quality of the voice service, and solves the negative impact on the performance of the existing network by optimizing the method of extracting the control block of the downlink null data in the prior art. . DRAWINGS

1 is a schematic diagram of a packet downlink closed loop power control in the prior art;

2 ( a ) is a flowchart of a method for acquiring a downlink measurement report according to an embodiment of the present invention; and FIG. 2 is a schematic structural diagram of an apparatus for acquiring a downlink measurement report according to an embodiment of the present invention;

2 ( bl ) is a flow chart of a method for acquiring a downlink measurement report according to another embodiment of the present invention;

2 (b2) is a schematic structural diagram of a mobile terminal according to another embodiment of the present invention;

FIG. 3 is a flowchart 1 of a method for acquiring a downlink measurement report according to another embodiment of the present invention; FIG. 4 is a flowchart 2 of a method for acquiring a downlink measurement report according to another embodiment of the present invention; FIG. 6 is a flowchart of step 501 in the method for acquiring a downlink measurement report provided by FIG. 5; FIG. 7 is another embodiment of the present invention; A method for obtaining a downlink measurement report is provided in a flowchart of FIG. 8; FIG. 8 is a schematic structural diagram 1 of an apparatus for acquiring a downlink measurement report according to another embodiment of the present invention; FIG. 8(b) is a second schematic structural diagram of an apparatus for acquiring a downlink measurement report according to another embodiment of the present invention;

9(a) is a schematic structural diagram 1 of a mobile terminal according to another embodiment of the present invention; FIG. 9(b) is a second schematic structural diagram of a mobile terminal according to another embodiment of the present invention; FIG. FIG. 10 is a flowchart of a method for differentiated packet downlink power control according to an embodiment of the present invention; FIG. 11 is a flowchart of differentiated packet downlink power control according to an embodiment of the present invention; Schematic diagram of the device;

FIG. 12 is a flowchart of a method for initial packet downlink power control according to an embodiment of the present invention; FIG. 13 is a schematic structural diagram of an initial packet downlink power control device according to an embodiment of the present invention. detailed description

In order to implement the downlink quality measurement report to be sent to the network side in real time, an embodiment of the present invention provides a method, device, and system for acquiring a downlink measurement report.

As shown in FIG. 2 (al), the method for obtaining a downlink measurement report provided by the embodiment of the present invention may be implemented by a base station control device, and the method may include:

101. When the mobile terminal is required to send a downlink measurement report, request the mobile terminal to carry the downlink measurement report in the uplink RLC data block.

In this embodiment, the time when the mobile terminal needs to send the downlink report is determined by the base station control device, and may be triggered by the base station control device periodically, or may be triggered by an event. The event triggering may be a trigger caused by a sudden change in network quality of the network where the base station control device is located, or may be a trigger caused by the start or end of data interaction between the mobile terminal and the base station control device and the base station.

102. Receive an uplink RLC data block that is sent by the mobile terminal, where the uplink RLC data block carries the downlink measurement report.

In this embodiment, the downlink measurement report includes, but is not limited to, a mean bit error rate, a receiving level, and/or an interference level of the downlink; Specifically, the downlink measurement report includes a mean bit error rate, a receiving level, and an interference level of the downlink.

103. Acquire, according to the uplink RLC data block, the downlink quality measurement report.

Corresponding to the above method, as shown in FIG. 2 (a2), the embodiment of the present invention further provides an apparatus for acquiring a downlink measurement report, including:

The first requesting unit 11 is configured to: when the mobile terminal is required to send the downlink measurement report, request the mobile terminal to carry the downlink measurement report in the uplink radio link control (RLC) data block; the first receiving unit 12, Receiving, by the mobile terminal, an uplink RLC data block, where the uplink RLC data block carries the downlink measurement report;

The first obtaining unit 13 is configured to obtain the downlink quality measurement report according to the uplink RLC data block received by the first receiving unit.

The method and device for obtaining a downlink measurement report provided by the embodiment of the present invention, when the base station control device needs the mobile terminal to send a downlink measurement report, the mobile terminal sends the downlink quality measurement report to the base station control by using the uplink RLC data block. The device can return the downlink measurement report to the base station control device in time, so that the base station control device can determine whether the downlink transmit power of the base station needs to be adjusted in time, thereby solving the problem that the downlink quality measurement report is not sent in real time. Power control lag, power control failure and other issues.

As shown in FIG. 2 (b l ), the method for obtaining a downlink measurement report according to another embodiment of the present invention may be implemented by a mobile terminal, and the method may include:

201. Receive a request sent by the base station control device to carry the downlink measurement report in the uplink radio link control RLC data block.

In this embodiment, the downlink measurement report includes, but is not limited to, a mean bit error rate, a receive level, and/or an interference level of the downlink;

Specifically, the downlink measurement report includes a mean bit error rate, a receiving level, and an interference level of the downlink.

202. The downlink quality measurement report is carried in an uplink RLC data block and sent to the office. The base station controls the device.

Corresponding to the foregoing method, as shown in FIG. 2 (b2), another embodiment of the present invention further provides a mobile terminal, including:

a second receiving unit 21, configured to receive, by the base station control device, a request for carrying a downlink measurement report in an uplink radio link control RLC data block;

The first sending unit 22 is configured to carry the downlink quality measurement report in an uplink RLC data block and send the signal to the base station control device.

In order to facilitate the understanding by those skilled in the art, a method for obtaining a downlink measurement report according to another embodiment of the present invention is described in detail. As shown in FIG. 3, the method may include:

301. When the mobile terminal is required to send the downlink measurement report, the base station control device requests the mobile terminal to carry the downlink measurement report in the uplink RLC data block.

In this embodiment, the uplink RLC data block may include a length indicator field and a downlink quality measurement report field, where the value of the length indication field is used to identify whether a downlink exists in the uplink RLC data block. The downlink quality measurement report field is used to carry the downlink quality measurement report.

302. When receiving a request sent by the base station control device to carry the downlink measurement report in the uplink RLC data block, the mobile terminal carries the downlink quality measurement report in an uplink RLC data block and sends the downlink quality measurement report to the base station. controlling device.

In this embodiment, the mobile terminal carries the downlink measurement report in an uplink RLC data block and sends the signal to the base station control device, which can be implemented in the following manner: The downlink link measurement report carries the downlink quality measurement report field in the uplink RLC data block, and identifies that the uplink RLC data block carries the downlink measurement by using the value of the length indication field in the uplink RLC data block. Reporting; then transmitting the uplink RLC data block to the base station control device.

The method of carrying the downlink quality measurement report in the uplink RLC data is similar to the dynamic time slot reduction (DTR), which can be implemented by modifying the existing uplink RLC data format definition. Specifically, in this embodiment, the downlink RLC is implemented. The definition of the data block format definition is as follows:

The uplink RLC data block includes a length indicator field and a downlink quality measurement report field, where the value of the length indication field is a new predefined fixed value, and is used to identify whether a downlink is present in the uplink RLC data block. The downlink quality measurement report field is a new field field in the uplink RLC data block, and is used to carry the downlink quality measurement report.

The definition of the uplink RLC data block format is modified as follows:

(1) Add a downlink quality measurement report field to the uplink RLC data block.

(2) Pre-defining a new length indication Length Indicator value, which is used to identify whether there is a downlink quality measurement report field in the uplink RLC data block.

(3) The downlink quality measurement report field content includes three fields: C-VALUE, MEAN-BEP, I-LEVEL. The C_VALUE field is 6 bits long, indicating the receiving level on the MS side; the MEAN_BEP field is 5 bits long, indicating the downlink mean BEP; the I_LEVEL field is 4 bits long, indicating the downlink PDCH Interference level. These field definitions are the same as those defined in the EGPRS Channel Quality Report IE. See the 3GPP TS 44.060 protocol for details.

(4) The downlink quality measurement report field may be, but is not limited to, placed after the last Logical Link Control Protocol Data Unit (LL PDU) in the uplink RLC data block. If the DTR information needs to be carried in the uplink RLC data block at the same time, The order in which the downlink quality measurement report field and the DTR information field are placed is determined by the placement order of the respective length indicator fields Length Indicator.

Here, a general packet radio service (GPRS) uplink RLC data block and an enhanced general packet radio service (EGPRS) uplink RLC data block are taken as an example for detailed description, and the GPRS uplink RLC data block is used as an example. The format definition modification is shown in Table 1. The format definition modification of the EGPRS uplink RLC data block is shown in Table 2.

Table 1: Format of GPRS uplink RLC data block

Bit

8 7 4 3

Payload Type Countdown Value SI MAC Header (MAC header)

( Pay load Type)

Spare PI TFI TI octet 1 (Octet 1 )

(empty)

BSN octet 3 (Octet 2 )

Length ίLength indicator M octet 3 (optional) (Octet

3 (optional) )

Length ίLength indicator M octet M (optional) (Octet M

(optional))

Octet M+l\ (ctet M+l \)

Octet M+2} (optional)

Temporary logical link identifier TLLI

(Octet M+2 } (optional))

Octet M+3/ (Octet M+3

/)

Octet M+4/(Octet

M+4/ )

Power factor indication field PFI octet M+5/(Octet M + 5

/)

Octet M+6 (Octet M+6)

Radio link control layer data block (RLC data)

Octet K-l ( Octet K-l)

Octet Κ (optional)

( Octet K (optional) )

Downlink quality measurement report field

Octet K +l (optional)

(Octet K+l (optional)) octet N-l (Octet N-l)

Octet N (Octet N)

Spare (spare) (if present)

Table 1 shows the format definition modification of the GPRS uplink RLC data block, in which the length indication field is added to the corresponding line of Octet 3 (optional) - Octet M ( optional ) ( Length Indicator), in the row corresponding to Octet k (optional) and Octet k+1 (optional), the downlink measurement report field, the meaning of other fields in the GPRS uplink RLC data block in Table 1 The detailed description of the GPRS uplink RLC data block in the prior art will not be described here.

Table 2: Format of EGPRS uplink RLC data block

Bit

Length indicator Octet 1 (optional) (Octet 1 (optional)) Length Indicator (Length indicator) Octet M (optional) ( Octet M (optional) )

{octet M +1\octet M+2}

Temporary Logical Link Identifier TLLI ({Octet M+l \Octet M+2 } (optional))

Octet M +3/ (Octet M+3 /)

Octet M +4/(Octet M+4 /)

Power factor indication field PFI octet M +5/(Octet M+5 /(

Octet M +6/ (Octet M+6)

Radio link control layer data block (RLC data)

Octet K-l (Octet K-l)

Octet K (optional) (Octet K (optional))

Downlink quality measurement report field

Octet K+1 (optional) (Octet K+1 (optional) ) octet N2-1 (Octet N2-1 )

Octet N2 (Tablet N2) Table ² shows the format definition modification of the EGPRS uplink RLC data block, where the length indicator field is added to the corresponding line of Octet 1 (optional) - Octet M (optional) Adding a downlink measurement report field to the row corresponding to the Octet k (optional) and Octet k+1 (optional) in the MAC header, and the meanings in other fields in the EGPRS uplink RLC data block in Table 2 The detailed description of the GPRS uplink RLC data block in the prior art will not be described here.

303. The base station control device receives the uplink RLC data block sent by the mobile terminal, and obtains the downlink quality measurement report according to the uplink RLC data block.

In this embodiment, the base station control device determines whether the downlink transmit power of the base station needs to be adjusted according to the downlink measurement report sent by the mobile terminal in time, and performs the downlink power control decision in time.

Further, as shown in FIG. 4, in order to avoid requesting downlink from the base station control device to the mobile terminal When the link quality measurement report is carried in the uplink RLC data block and the mobile terminal does not have the uplink data, the downlink quality measurement report cannot be transmitted. The method provided in this embodiment, after the step 301, further includes:

401. When the base station control device requests the downlink quality measurement report but the mobile terminal does not send the uplink data, the downlink quality measurement report is carried in the uplink RLC/MAC control message and sent to the base station control device.

In this embodiment, the uplink RLC/MAC control message may be a packet uplink acknowledgement/denial ((EGPRS) PACKET DOWNLINK ACK/NACK).

402. The base station control device receives an uplink RLC/MAC control message that is sent by the mobile terminal and carries the downlink quality measurement report, and obtains the downlink quality measurement report according to the uplink RLC data block.

Further, in order to solve the terminal compatibility problem, before the step 301, the method may further include:

501. The base station control device determines, according to the real-time packet downlink power control identifier field sent by the mobile terminal, that the mobile terminal supports real-time packet downlink power control.

In this embodiment, a real-time packet downlink power control identifier field may be added in the mobile terminal radio access capability information element (MS Radio Access Capability IE), where the real-time packet downlink power control identifier field is used to identify whether the mobile terminal supports real-time grouping. For the downlink power control, the base station control device requests only the mobile terminal supporting the real-time packet downlink power control to carry the downlink quality measurement report in the uplink RLC data block. Specifically, as shown in FIG. 6, the base station control device determines, according to the real-time packet downlink power control identifier field sent by the mobile terminal, that the mobile terminal supports real-time packet downlink power control, which may include:

601. The mobile terminal sends the mobile terminal radio access capability information element MS Radio Access Capability IE to the base station control device.

In this embodiment, a real-time packet downlink power control identifier field is added to the mobile terminal radio access capability cell, and the real-time packet downlink power control identifier field is used to identify whether the mobile terminal supports Real-time grouping downlink power control.

602. The base station control device receives the mobile terminal radio access capability information element (MS Radio Access Capability IE) sent by the mobile terminal, and determines, according to the real-time packet downlink power control identifier field sent by the mobile terminal, that the mobile terminal supports real-time packet downlink power control.

It is to be noted that, if the base station control device determines, according to the real-time packet downlink power control identifier field sent by the mobile terminal, that the mobile terminal does not support real-time packet downlink power control, when the mobile terminal needs to send a downlink measurement report, the base station controls The device requests the mobile terminal to carry the downlink measurement report in the uplink RLC/MAC control message. The specific implementation is the same as the prior art, and details are not described herein again.

It is worth noting that when the mobile terminal supports the real-time packet downlink power control, the mobile terminal has two ways of transmitting the downlink quality measurement report: based on the uplink RLC data block carrying mode and the uplink RLC/MAC control message carrying mode.

Further, when the mobile terminal supports the real-time packet downlink power control, in order to indicate which transmission mode is supported by the mobile terminal, as shown in FIG. 7, the real-time packet downlink power control method provided in this embodiment is performed in step 301. Previously, it also included:

701. If the mobile terminal supports real-time packet downlink power control, when the mobile terminal initially accesses, the base station control device configures a downlink quality measurement report carrying manner of the mobile terminal.

In this embodiment, the configuring the downlink quality measurement report carrying manner of the mobile terminal includes: configuring, by using an assignment message or a reconfiguration message, a downlink quality measurement report carrying manner of the mobile terminal. The assignment message or reconfiguration message configuration may be: packet uplink assignment message PACKET UPLINK ASSIGMENT, immediate assignment message IMMEDIATE ASSIGNMENT, packet slot reassignment message PACKET TIMESLOT RECONFIGUR.

Specifically, the downlink quality measurement report carries the mode field field:

{0 I 1 Indication of PMR Activated based on data carrying measurement report: bit ( 1 ) }

The form is added to the assignment message or the reconfiguration message, specifically, added to the assignment message or The last time the configuration message is used as the last byte of the assigned message or the reconfiguration message;

The activation indication field based on the measurement report carried by the data is used to indicate whether to activate the uplink RLC data block-based carrying mode of the mobile terminal.

In this embodiment, the activation indication field of the measurement report based on the data is 1 indicates that the mobile terminal is activated based on the uplink RLC data block, and the carrying mode based on the uplink RLC data block is The manner in which the downlink quality measurement report is carried in the uplink RLC data block; the activation indication field based on the measurement report carried by the data is 0, indicating that the mobile terminal is not activated based on the carrying mode of the uplink RLC data block (although the MS may support the packet Downlink real-time power control), the downlink quality measurement report carrying mode is based on the uplink RLC/MAC control message carrying manner.

702. The mobile terminal receives an assignment message or a reconfiguration message sent by the base station control device, and determines, according to the carrying manner of the downlink quality measurement report carried in the assignment message or the reconfiguration message, that the mobile terminal sends a downlink quality measurement report. Carrying method.

703: At a time when the downlink measurement report needs to be polled, if the downlink quality measurement report carrying mode is configured to be based on the uplink RLC/MAC control message carrying manner, the BSC requests the mobile terminal to carry the downlink measurement report. In the relevant upstream RLC/MAC control message.

In this embodiment, the requesting the mobile terminal to carry the downlink measurement report in the uplink RLC data block, the specific implementation manner is:

The downlink RLC/MAC radio block is sent to the mobile terminal, and the downlink RLC/MAC radio block carries indication signaling for instructing the mobile terminal to carry the downlink measurement report in the uplink RLC data block.

Specifically, the indication signaling is carried in a power attenuation (PR) field in a downlink RLC/MAC radio block header to request the mobile terminal to carry the downlink measurement report in an uplink RLC data block. Wherein, the 11 value in the PR field value is a reserved value, and the indication that the mobile terminal side carries the downlink quality measurement report in the uplink RLC data block can be implemented by setting the PR field value to 11. The value of the field worth configuring is not limited to the above one.

It is worth noting that, based on the data carrying measurement report is not activated, the downlink The power attenuation PR field in the RLC/MAC radio block header is the same as the existing one, and is not described here again. However, if the measurement report carried by the data is activated, the definition of the power attenuation PR field in the downlink RLC/MAC radio block header is also Modify accordingly, as shown in Table 3, specific:

The bit value 11 of the original PR field is a reserved value. In this embodiment, the value is used by the base station control device to instruct the mobile terminal to carry the downlink quality measurement report information in the uplink RLC data block. Other bit values 00 to 10 of the PR field, in addition to indicating the existing meaning, indicate that the network side does not instruct the MS to carry downlink quality measurement report information in the uplink RLC data block.

Table 3: PR field definitions in PMR activation mode

In summary, if the PMR of the mobile terminal is activated, the PR field value in the current downlink RLC/MAC radio block header is set to 11, then the mobile terminal receives the downlink RLC/MAC radio block with a PR value of 11, If the mobile terminal has uplink data at this time, the uplink RLC/MAC radio block is sent in the next radio block period, and the downlink quality measurement report is carried in the corresponding RLC data block; if the MS does not have the uplink data at this time, the next one The relevant uplink RLC/MAC control message, such as an (EGPRS) PACKET DOWNLINK ACK/NACK message, is transmitted during the radio block period.

It is worth noting that the base station control device determines that the downlink quality measurement report needs to be sent as the USF of the mobile terminal, so that the mobile terminal recognizes the downlink RLC/MAC radio block.

It can be understood that, besides carrying the indication signaling for indicating that the mobile terminal carries the downlink measurement report in the uplink RLC data block in the downlink RLC/MAC radio block, the existing message may be carried by other existing messages. The signaling is indicated, or the indication signaling is carried by a special message, which is not limited in this embodiment. Corresponding to the above method, as shown in FIG. 8( a ), another embodiment of the present invention further provides an apparatus for acquiring a downlink measurement report, including:

a first requesting unit 81, configured to: when the mobile terminal is required to send a downlink measurement report, request the mobile terminal to carry the downlink measurement report in an uplink radio link control (RLC) data block; the first receiving unit 82, Receiving, by the mobile terminal, an uplink RLC data block, where the uplink RLC data block carries the downlink measurement report;

The first obtaining unit 83 is configured to obtain the downlink quality measurement report according to the uplink RLC data block received by the first receiving unit.

Further, in order to solve the terminal compatibility problem, as shown in FIG. 8( a ), the apparatus for acquiring a downlink quality measurement report further includes: a field determining that the mobile terminal supports real-time packet downlink power control, where The real-time packet downlink power control identifier field is used to identify whether the mobile terminal supports real-time packet downlink power control.

In this embodiment, the first determining unit includes:

The receiving subunit 841 is configured to receive a mobile station radio access capability information element MS Radio Access Capability IE, where the mobile terminal radio access capability cell includes a real-time packet downlink power control identifier field;

The determining subunit 842 is configured to determine, according to the real-time packet downlink power control identifier field, that the mobile terminal supports real-time packet downlink power control.

Further, when the mobile terminal supports the real-time packet downlink power control, in order to indicate which type of transmission mode the mobile terminal supports, as shown in FIG. 8(b), the apparatus for acquiring the downlink measurement report by the base station further includes:

The configuration unit 85 is configured to configure, when the first determining unit determines that the mobile terminal supports the real-time packet downlink power control, when the mobile terminal initially accesses, configure a downlink quality measurement report carrying manner of the mobile terminal.

In this embodiment, the configuration unit includes: The first configuration subunit 851 is configured to configure a downlink quality measurement report carrying manner of the mobile terminal by using an assignment message or a reconfiguration message.

The first request unit includes:

a first requesting subunit 811, configured to send a downlink radio link control/media access control (RLC/MAC) radio block to the mobile terminal, where the downlink RLC/MAC radio block is used to indicate that the mobile terminal is to be downlinked The link measurement report carries the indication signaling in the uplink RLC data block.

Specifically, the first request subunit includes: a configuration module, configured to carry the indication signaling in a power attenuation (PR) field in a downlink RLC/MAC radio block header, and simultaneously set an uplink state identifier (USF) And the sending module is configured to send the downlink RLC/MAC radio block configured by the configuration module to the mobile terminal, to request the mobile terminal to carry the downlink measurement report in the In the uplink RLC data block. The configuration module specifically includes:

The configuration submodule is configured to set a PR field value in the downlink RLC/MAC radio block header to 11 and the PR field value is 11 to indicate that the mobile terminal side carries the downlink quality measurement report in the uplink RLC data block.

Corresponding to the above method, as shown in FIG. 9( a ), another embodiment of the present invention further provides a mobile terminal, including:

The second receiving unit 91 is configured to receive, by the base station control device, a request for carrying the downlink measurement report in the uplink radio link control RLC data block;

The first sending unit 92 is configured to carry the downlink quality measurement report in an uplink RLC data block and send the signal to the base station control device.

In this embodiment, the first sending unit includes:

a generating subunit 921, configured to carry the downlink measurement report in a downlink quality measurement report field in the uplink RLC data block, and identify the uplink RLC data by using a value of a length indication field in the uplink RLC data block The block carries a downlink measurement report;

a second sending subunit 922, configured to send the uplink RLC data block generated by the generating subunit Send to the base station control device.

Further, in order to avoid the problem that the downlink quality measurement report cannot be transmitted when the base station control device requests the mobile terminal to report that the downlink quality measurement report is carried in the uplink RLC data block and the mobile terminal does not have uplink data, as shown in FIG. 9 ( The mobile terminal further includes: a second sending unit 93, configured to: when the base station control device requests a downlink quality measurement report but the mobile terminal does not send uplink data, the downlink quality measurement report The bearer is carried in the uplink radio link control/media access control RLC/MAC control message and sent to the base station control device.

Further, in order to solve the terminal compatibility problem, as shown in FIG. 9 (c), the mobile terminal further includes:

a third sending unit 94, configured to send, to the base station control device, a mobile terminal radio access capability information element, where the mobile terminal radio access capability cell includes a real-time packet downlink power control identifier field, where The real-time packet downlink power control identifier field is used to identify whether the mobile terminal supports real-time packet downlink power control;

Further, when the mobile terminal supports the real-time packet downlink power control, as shown in FIG. 9(c), in order to indicate which one of the transmission modes is supported by the mobile terminal, the mobile terminal further includes:

The third receiving unit 95 is configured to receive an assignment message or a reconfiguration message sent by the base station control device, where the assignment message or the reconfiguration message carries a downlink quality measurement method; the second determining unit 96 And determining, according to the carrying manner of the downlink quality measurement report carried in the assignment message or the reconfiguration message received by the third receiving unit, a carrying manner of the downlink quality measurement report sent by the mobile terminal, where the downlink is The carrying manner of the quality measurement report includes a carrying mode based on the uplink RLC data block and a carrying mode based on the uplink RLC/MAC control message.

Corresponding to the above method, another embodiment of the present invention further provides a system for acquiring a downlink measurement report, which includes the foregoing apparatus for acquiring a downlink measurement report and the foregoing mobile terminal.

The method, device and system for real-time packet downlink power control provided by the embodiment of the present invention, when the base station control device needs the mobile terminal to send a downlink measurement report, the mobile terminal passes the uplink RLC number The block transmits the downlink quality measurement report to the base station control device, and can return the downlink measurement report to the base station control device in time, so that the base station control device can timely determine whether the downlink transmit power of the base station needs to be adjusted, and the solution is solved. The downlink quality measurement report sends problems such as power control lag and power control failure caused by not real-time.

Further, in order to distinguish the transmit power of the downlink data block and the downlink null data control block, as shown in the figure

As shown in FIG. 10, the method for the differentiated packet downlink power control provided by the embodiment of the present invention may be completed by the base station control device, and the method may include:

1001. Receive a downlink quality measurement report sent by the mobile terminal.

1002. Calculate, according to the downlink measurement report and the current coding mode, a first downlink power control parameter corresponding to the downlink data block.

1003. Calculate, according to the downlink measurement report and the CS-1 coding mode, a second downlink power control parameter corresponding to the downlink null data control block carrying the uplink state identifier (USF).

1004: Send the first power control parameter, the second power control parameter, and a preset power attenuation value to the base station, where the preset power attenuation value is used to control a downlink null data control block that does not carry the USF. Power control.

When determining to adjust the transmit power of the base station side downlink packet data channel PDCH, based on the downlink quality measurement report, the base station control device may use different downlink data blocks and downlink air data control blocks (PACKET DOWNLINK DUMMY CONTROL BLOCK) respectively. The power control mechanism.

Corresponding to the foregoing method, as shown in FIG. 11, the embodiment of the present invention further provides a device for differentiated packet downlink power control, including:

The fourth receiving unit 111 is configured to receive a downlink quality measurement report that is sent by the mobile terminal, where the first calculating unit 112 is configured to calculate, according to the downlink measurement report and the current coding mode, the first downlink corresponding to the downlink data block. Line power control parameters;

The second calculating unit 113 is configured to calculate, according to the downlink measurement report and the CS-1 coding mode, a second downlink power control corresponding to the downlink null data control block carrying the uplink state identifier (USF) Parameter

The second sending unit 114 is configured to send, to the base station, the first power control parameter calculated by the first calculating unit, the second power control parameter calculated by the second calculating unit, and a preset power attenuation value. The preset power attenuation value is used to control the power control of the downlink null data control block that does not carry the USF.

The method and device for differentiated packet downlink power control provided by the embodiment of the present invention separately control the transmit power of the downlink data block and the downlink null data control block, thereby minimizing the transmit power of the uplink null data control block, thereby reducing The downlink interference is reduced, which reduces the interference of the packet service to the voice service, which significantly improves the quality of the voice service, and solves the optimization method in the prior art that does not transmit the downlink null data control block, thereby causing the performance of the existing network. Negative impact.

Further, in order to avoid the problem that the power control of the small data volume service is difficult to start or even fail, as shown in FIG. 12, the initial packet downlink power control method provided by the embodiment of the present invention may be completed by the base station control device, and the method is Can include:

1201. Cache a downlink power control parameter, and establish an association between the downlink power control parameter and a temporary logical link identifier TLLI corresponding to the mobile terminal.

Specifically, the BSC, according to the packet downlink closed loop power control algorithm, determines that the BTS transmit power needs to be adjusted, and caches the newly calculated power attenuation parameter PR, and associates with the TLLI. After the power control parameter PR is buffered, the BSC needs to update the buffered power attenuation parameter PR once it is determined that the transmit power of the downlink RLC/MAC radio block of the MS needs to be adjusted. The buffered PR is used as the initial attenuation value of the downlink RLC/MAC radio block transmit power after the next packet access of the MS.

It is worth noting that the power attenuation parameter PR also includes an effective time period. When the PR is buffered, an appropriate effective time period needs to be set, and an effective time period of an appropriate size reflects the large fluctuation of the downlink quality during the period. The probability is small. PR is valid only during the valid time period, otherwise it is invalid.

1202. Acquire a cached downlink according to the TLLI when the mobile terminal initiates packet access next time. Power control parameters.

In this embodiment, the step 1202 includes:

When the MS initiates a one-stage packet access, the BSC obtains the PDCCH from the uplink RLC/MAC data block, and obtains the buffered PR according to the TLLI (PR is the power attenuation value relative to P0, and P0 is relative to The initial attenuation value of the broadcast control channel BCCH transmit power). If the PR is valid, the BSC passes P0 and PR to the BTS through the Abis interface, and the BTS adjusts the transmit power of the MS's downlink RLC/MAC radio block based on P0 and PR. If the downlink quality measurement report field is carried in the uplink RLC/MAC radio block, the BSC performs packet downlink closed loop power control based on the buffered PR and downlink quality measurement report.

When the MS initiates the two-phase packet access, the BSC obtains the TLLI and the downlink quality measurement report from the control message, such as the PACKET RESOURCE REQUEST message, and obtains the cached PR according to the TLLI. The buffered PR and downlink quality measurement reports perform packet downlink closed loop power control.

1203. If the downlink power control parameter is within a preset effective time period, send the downlink power control parameter to the base station as an initial attenuation value of the downlink RLC/MAC radio block transmit power.

Corresponding to the foregoing method, as shown in FIG. 13, the embodiment of the present invention further provides an initial device for grouping and downlink power control, including:

The cache establishing unit 1301 is configured to buffer the downlink power control parameter, and establish an association between the downlink power control parameter and the temporary logical link identifier TLLI corresponding to the mobile terminal.

The second obtaining unit 1302 is configured to obtain the buffered downlink power control parameter according to the TLLI when the mobile terminal initiates packet access next time.

The third sending unit 1303 is configured to send the downlink power control parameter as an initial attenuation value of the downlink RLC/MAC radio block transmit power to the base station if the downlink power control parameter is within a preset effective time period.

The method and device for initial packet downlink power control provided by the embodiment of the present invention solve the downlink closed loop power control of the small data volume service after packet access by using the downlink power control parameter caching mechanism described above The problem that cannot be started, thereby increasing the gain of the packet downlink closed loop power control.

The enhanced packet downlink power control method, device and system provided by the embodiments of the present invention can be applied to a GPRS/EGPRS system.

A person skilled in the art can understand that all or part of the steps of implementing the above embodiments can be completed by a program to instruct related hardware, and the program can be stored in a computer readable storage medium, such as ROM/RAM, magnetic. Disc or CD.

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

Claim

A method for obtaining a downlink measurement report, comprising:

When the mobile terminal is required to send a downlink measurement report, requesting the mobile terminal to carry the downlink measurement report in an uplink radio link control (RLC) data block;

Receiving, by the mobile terminal, an uplink RLC data block, where the uplink RLC data block carries the downlink measurement report;

And obtaining the downlink quality measurement report according to the uplink RLC data block.

The method according to claim 1, wherein the uplink RLC data block includes a length indication field and a downlink quality measurement report field, where the value of the length indication field is used to identify the uplink RLC data. Whether there is a downlink quality measurement report field in the block, where the downlink quality measurement report field is used to carry the downlink quality measurement report.

The method according to claim 1, wherein the obtaining the downlink quality measurement report according to the uplink RLC data block comprises:

A downlink bit error rate, a reception level, and an interference level are acquired according to the uplink RLC data block.

The method according to any one of claims 1-3, wherein before the requesting mobile terminal carries the downlink measurement report in the uplink RLC data block, the method further includes:

Determining, according to the real-time packet downlink power control identifier field sent by the mobile terminal, that the mobile terminal supports real-time packet downlink power control, where the real-time packet downlink power control identifier field is used to identify whether the mobile terminal supports real-time packet downlink power control .

The method according to claim 4, wherein the determining, according to the real-time packet downlink power control identifier field sent by the mobile terminal, that the mobile terminal supports real-time packet downlink power control, includes: receiving, sending, by the mobile terminal a mobile terminal radio access capability cell, where the mobile terminal radio access capability cell includes a real-time packet downlink power control identifier field;

Determining, according to the real-time packet downlink power control identifier field, that the mobile terminal supports real-time packet downlink power control.

6. The method according to claim 4, further comprising:

If the mobile terminal supports real-time packet downlink power control, when the mobile terminal initially accesses, configure a downlink quality measurement report carrying manner of the mobile terminal.

The method according to claim 5, wherein the configuring the downlink quality measurement report carrying manner of the mobile terminal comprises:

The downlink quality measurement report carrying manner of the mobile terminal is configured by an assignment message or a reconfiguration message.

The method according to claim 6, wherein the configuring the downlink quality measurement report carrying manner of the mobile terminal by using an assignment message or a reconfiguration message comprises: the assignment message or reconfiguration The message carries the mode field {0 I 1 based on the activation indication field of the measurement report carried by the data: bit(l) }, where the mode field indicates the downlink quality measurement report carrying mode; wherein, the data carrying The activation indication field of the measurement report is used to indicate whether to activate the uplink RLC data block based carrying manner of the mobile terminal;

The activation indication field of the data-based measurement report is 1, indicating that the mobile terminal is activated based on the uplink RLC data block, wherein the uplink RLC data block-based carrying mode is the downlink quality measurement report. The way to carry in the uplink RLC data block.

The method according to claim 6, wherein the requesting the mobile terminal to carry the downlink measurement report in an uplink RLC data block includes:

Transmitting a downlink radio link control/media access control (RLC/MAC) radio block to the mobile terminal, where the downlink RLC/MAC radio block carries a direction for instructing the mobile terminal to carry the downlink measurement report in the uplink RLC data Indication signaling in the block.

10. The method according to claim 9, wherein the transmitting a downlink radio link control/media access control (RLC/MAC) radio block to the mobile terminal, in the downlink RLC/MAC radio block Carrying indication signaling for instructing the mobile terminal to carry the downlink measurement report in the uplink RLC data block, including:

The power attenuation (PR) field carried in the downlink RLC/MAC radio block header by the indication signaling Medium

The downlink RLC/MAC radio block is transmitted to the mobile terminal to request the mobile terminal to carry the downlink measurement report in an uplink RLC data block.

The method according to claim 10, wherein the carrying the indication signaling in a power attenuation (PR) field in a downlink RLC/MAC radio block header comprises:

The PR field value in the downlink RLC/MAC radio block header is set to 11, and the PR field value is 11, indicating that the mobile terminal side carries the downlink quality measurement report in the uplink RLC data block.

12. An apparatus for obtaining a downlink measurement report, comprising:

a first requesting unit, configured to: when the mobile terminal is required to send a downlink measurement report, request the mobile terminal to carry the downlink measurement report in an uplink radio link control (LC) data block;

a first receiving unit, configured to receive an uplink RLC data block that is sent by the mobile terminal, where the uplink RLC data block carries the downlink measurement report;

13. The device according to claim 12, further comprising:

a first determining unit, configured to determine, according to the real-time packet downlink power control identifier field sent by the mobile terminal, that the mobile terminal supports real-time packet downlink power control, where the real-time packet downlink power control identifier field is used to identify the mobile terminal Whether to support real-time packet downlink power control.

The device according to claim 12, wherein the first determining unit comprises: a receiving subunit, configured to receive a mobile terminal radio access capability cell sent by the mobile terminal, where the mobile terminal is wirelessly connected The in-capability cell includes a real-time packet downlink power control identifier field;

The determining subunit is configured to determine, according to the real-time packet downlink power control identifier field, that the mobile terminal supports real-time packet downlink power control.

The device according to claim 13, further comprising:

a configuration unit, configured to: if the first determining unit determines that the mobile terminal supports real-time packet downlink power control, configure a downlink quality measurement report of the mobile terminal when the mobile terminal initially accesses

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The device according to claim 13, wherein the configuration unit comprises: a first configuration subunit, configured to configure a downlink quality measurement report of the mobile terminal by using an assignment message or a reconfiguration message Carrying method.

The device according to any one of claims 12-16, wherein the first request unit comprises:

a first requesting subunit, configured to send a downlink radio link control/media access control (RLC/MAC) radio block to the mobile terminal, where the downlink RLC/MAC radio block is used to indicate that the mobile terminal is to go to the downlink The road measurement report carries the indication signaling in the uplink RLC data block.

The device according to claim 17, wherein the first request subunit comprises:

a configuration module, configured to carry the indication signaling in a power attenuation (PR) field in a downlink RLC/MAC radio block header;

And a sending module, configured to send the downlink RLC/MAC radio block configured by the configuration module to the mobile terminal, to request the mobile terminal to carry the downlink measurement report in an uplink RLC data block.

The device according to claim 18, wherein the configuration module comprises: a configuration submodule, configured to set a PR field value in a downlink RLC/MAC radio block header to the

The value of the PR field is 11, indicating that the mobile terminal side carries the downlink quality measurement report in the uplink RLC data block.

20. A method for obtaining a downlink measurement report, characterized by comprising:

Receiving, by the base station control device, a request for carrying a downlink measurement report in an uplink radio link control (RLC) data block;

The downlink quality measurement report is carried in an uplink RLC data block and sent to the base station control device.

The method according to claim 20, wherein the downlink quality is The measurement report is carried in the uplink RLC data block and sent to the base station control device, including: carrying the downlink measurement report in a downlink quality measurement report field in the uplink RLC data block, and passing the uplink RLC data block The value of the length indication field identifies that the uplink RLC data block carries a downlink measurement report;

Transmitting the uplink RLC data block to the base station control device.

22. The method according to claim 21, wherein the downlink quality measurement report includes a mean bit error rate, a reception level, and an interference level of the downlink.

The method according to any one of claims 20 to 22, further comprising: when the base station control device requests a downlink quality measurement report but the mobile terminal does not send uplink data, the downlink quality is The measurement report is carried in the uplink radio link control/media access control (RLC/MAC) control message and sent to the base station control device.

The method according to any one of claims 20 to 22, further comprising: before the receiving, by the receiving base station control device, the request for carrying the downlink measurement report in the uplink radio link control RLC data block, the method further includes:

The mobile terminal radio access capability information element is sent to the base station control device, where the mobile terminal radio access capability information element includes a real-time packet downlink power control identification field, where the real-time packet downlink power control identification field is used to identify the mobile terminal Whether to support real-time packet downlink power control.

The method according to claim 24, further comprising:

Receiving, by the base station control device, an assignment message or a reconfiguration message, where the assignment message or the reconfiguration message carries a downlink quality measurement report carrying manner;

And determining, according to the carrying manner of the downlink quality measurement report carried in the assignment message or the reconfiguration message, a carrying manner of the downlink quality measurement report sent by the mobile terminal, where the carrying manner of the downlink quality measurement report includes The carrying mode of the RLC data block and the carrying mode based on the uplink RLC/MAC control message.

26. A mobile terminal, comprising:

a second receiving unit, configured to receive, by the base station control device, the downlink measurement report a request in an uplink radio link control (RLC) data block;

And a first sending unit, configured to carry the downlink quality measurement report in an uplink RLC data block and send the signal to the base station control device.

The mobile terminal according to claim 26, wherein the first sending unit comprises: a generating subunit, configured to carry the downlink measurement report in a downlink quality measurement report field in the uplink RLC data block. Identifying, by the value of the length indication field in the uplink RLC data block, that the uplink RLC data block carries a downlink measurement report;

And a second sending subunit, configured to send the uplink RLC data block generated by the generating subunit to the base station control device.

The mobile terminal according to claim 26 or 27, further comprising: a second sending unit, configured to: when the base station control device requests the downlink quality measurement report but the mobile terminal does not send the uplink data, The downlink quality measurement report is carried in an uplink radio link control/media access control (RLC/MAC) control message and sent to the base station control device.

The mobile terminal according to claim 26 or 27, further comprising: a third sending unit, configured to send the mobile terminal radio access capability information to the base station control device, where the mobile terminal wirelessly accesses The capability cell includes a real-time packet downlink power control identifier field, and the real-time packet downlink power control identifier field is used to identify whether the mobile terminal supports real-time packet downlink power control function.

The mobile terminal according to claim 28, further comprising:

a third receiving unit, configured to receive an assignment message or a reconfiguration message sent by the base station control device, where the assignment message or the reconfiguration message carries a downlink quality measurement report carrying manner;

a second determining unit, configured to determine, according to the carrying manner of the downlink quality measurement report carried in the assignment message or the reconfiguration message received by the third receiving unit, the carrying manner of the downlink quality measurement report sent by the mobile terminal, where The carrying manner of the downlink quality measurement report includes a carrying manner based on the uplink RLC data block and a carrying manner based on the uplink RLC/MAC control message.

31. A system for obtaining a downlink measurement report, comprising: the apparatus for acquiring a downlink measurement report according to any one of claims 10-15, and the apparatus of any one of claims 22-26

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32. A differentiated method for packet downlink power control, characterized in that:

Receiving a downlink quality measurement report sent by the mobile terminal;

Calculating, according to the downlink measurement report and the current coding mode, a first downlink power control parameter corresponding to the downlink data block;

Calculating, according to the downlink measurement report and the CS-1 coding mode, a second downlink power control parameter corresponding to the downlink null data control block carrying the uplink state identifier (USF);

Transmitting the first power control parameter, the second power control parameter, and the preset power attenuation value to the base station, where the preset power attenuation value is used to control the work of the downlink null data control block that does not carry the USF control.

33. A differentiated packet downlink power control device, comprising:

a fourth receiving unit, configured to receive a downlink quality measurement report sent by the mobile terminal, where the first calculating unit is configured to calculate, according to the downlink measurement report and the current coding mode, the first downlink function corresponding to the downlink data block Control parameter

a second calculating unit, configured to calculate, according to the downlink measurement report and the CS-1 coding mode, a second downlink power control parameter corresponding to the downlink null data control block carrying the uplink state identifier (USF); And sending, to the base station, the first power control parameter calculated by the first calculating unit, the second power control parameter calculated by the second calculating unit, and a preset power attenuation value, where the preset The power attenuation value is used to control the power control of the downlink null data control block that does not carry the USF.

34. A method for initial grouping downlink power control, which is characterized by:

Cache a downlink power control parameter, and establish an association between the downlink power control parameter and a temporary logical link identifier (TLLI) corresponding to the mobile terminal;

When the mobile terminal initiates the packet access, the downlink power control parameter is obtained according to the TLLI; if the downlink power control parameter is within the preset effective time period, the downlink power control parameter is used as the downlink wireless chain. Road Control/Media Access Control (RLC/MAC) Initial attenuation of radio block transmit power

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35. An initial device for grouping downlink power control, comprising:

a cache establishing unit, configured to cache a downlink power control parameter, and establish an association between the downlink power control parameter and a temporary logical link identifier (TLLI) corresponding to the mobile terminal;

a second acquiring unit, configured to acquire a buffered downlink power control parameter according to the TLLI when the mobile terminal initiates packet access next time;

And a third sending unit, configured to send the downlink power control parameter as an initial attenuation value of the downlink RL C/MAC radio block transmit power to the base station if the downlink power control parameter is within a preset effective time period.

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