WO2005039083A1

WO2005039083A1 - Method of adjusting the mode of the adaptive multi-rate speech coding

Info

Publication number: WO2005039083A1
Application number: PCT/CN2003/000888
Authority: WO
Inventors: Shenghua Huang; Jianwu Dou; Dapeng Li
Original assignee: Zte Corporation
Priority date: 2003-10-22
Filing date: 2003-10-22
Publication date: 2005-04-28
Also published as: AU2003280537A1; CN100539488C; CN1802806A

Abstract

Method of adjusting the mode of the adaptive multi-rate speech coding The present invention provides a method which could be used to adjust the mode of the adaptive multi-rate coding, and which is based on the fact of that a radio networks controller determines the limit of the adaptive multi-rate mode of the uplink and downlink in accordance with the traffic of the uplink and downlink, and then determines the coding transmission power according to the uplink transmission power of the user equipment as well as the downlink transmission power of the Node B, and synthetically determines whether the adaptive multi-rate mode of the uplink and downlink should be adjusted. The present invention, which is based on the adjust of the adaptive multi-rate speech coding mode of the actual transmission power, makes it possible to implement the adjusting of the speech AMR required by the WCDMA system with effect, and could be capable of improving the signal quality of the user's communication optimally, as well as decreasing the transmission power of the user equipment and maximizing the capacity of the system with reasonable logic and high efficiency.

Description

Method for adjusting adaptive multi-rate speech coding mode TECHNICAL FIELD

The invention relates to a Wideband Code Division Multiple Access (WCDMA) communication system, and in particular to a method for adjusting an adaptive multi-rate (Adaptable Multi-Rate, R for short) speech coding mode in a WCDMA communication system.

Background technique

With the widespread application and rapid development of mobile communication systems, many key technologies in mobile communication systems are becoming more and more perfect. While achieving the normal communication of users, we must consider how to obtain the best performance, so that the system and user equipment can obtain the best. Effect.

In the Global System for Mobile Communication (GSM for short), the coding rate of the source and the channel is fixed and has nothing to do with the channel quality. However, in the case of poor channel quality, the number of redundant bits of the channel coding is not sufficient to correct transmission errors. In this case, the number of redundant bits in the channel coding should be increased and the number of bits of the source code should be reduced to improve the speech quality. In the case of good channel quality, the number of bits of the source should be increased to improve speech quality. Therefore, the AMR speech encoder is used in the third generation mobile communication system. AMR solves the problem of the rate allocation of source coding and channel coding in a more intelligent way. That is, the actual speech rate depends on the channel through AMR. Quality can be said to be a function of channel quality.

In a WCDMA communication system, the user equipment (User Equipment, UE for short) in the process of moving, the radio environment is always changing, when the UE is away from the base station or the radio environment of the UE is deteriorated, if it remains The original rate transmission, so in order to ensure the quality of its service shield (Quality of Service, QoS for short), under the role of closed-loop power control, the base station will inevitably send signals with greater power. At this time, the impact of power changes is comparative Large, possible climb of power between many UEs N2003 / 000888 will lead to a sharp increase in power, which will further deteriorate the wireless environment and reduce the capacity of the communication system. Sometimes, even increasing the power of the UE to the limit will not improve the call quality. Therefore, it is necessary to use AMR to adjust Speech rate.

In the 3GPP protocol, it is specified that there are 8 AMR modes available for speech coding selection, and each AMR mode corresponds to a coding rate. In practical applications, the system can only use several AMR modes. The effect of speech coding using different AMR modes on the system is different. First, for the system itself, if the unsuitable AMR mode is used, the capacity of the system cannot be used to the maximum. Second, for the user, the unsuitable AMR mode may consume the transmit power of the UE too much. Therefore, the talkable time and standby time of the UE are reduced, or a good service quality cannot be obtained. Therefore, for which AMR mode is used to implement speech coding, factors such as the system capacity and the wireless environment in which the UE is located need to be considered, and some strategies must be adopted to obtain the best combination between the best service quality and system capacity.

A patent filed by Nokia Corporation with publication number WO0103448 and titled METHOD FOR SELECTION OF CODING METHOD gives a method for controlling AMR coding mode, which is based on cell load and frame error rate Adjust the AMR mode. However, the uplink frame error rate used in this method cannot truly represent the actual wireless status of the UE, and may not be able to quickly track the situation of the wireless environment in which the UE is located in real time, so it may lead to the failure to select a suitable one. AMR mode for encoding.

Summary of the invention

The technical problem to be solved by the present invention is to propose a method for adjusting an adaptive multi-rate speech coding mode in a WCDMA system, which can solve the shortcomings in the prior art that the AMR speech coding rate regulation requirements specified in the WCDMA standard cannot be well implemented.

The core method of the method for adjusting the adaptive multi-rate speech coding mode of the present invention is that the radio network controller determines the uplink and downlink allowed adaptive multi-rate mode according to the reported uplink and downlink load of the cell Based on the uplink transmit power of the user equipment and the downlink transmit code power of the Node B, determine the uplink and downlink adaptive multi-rate mode that a single user equipment wishes to adopt, and finally comprehensively determine whether to adjust the uplink and downlink adaptive multi-rate mode.

The specific steps are as follows:

Step 1: The radio network controller determines the upper limit of the adaptive multi-rate mode allowed in the uplink according to the received total broadband power, and determines the upper limit of the adaptive multi-rate mode allowed in the downlink according to the transmit carrier power. Step two, the radio network controller according to the user equipment The reported uplink transmission power determines the uplink adaptive multi-rate mode desired by a single user equipment; and determines the downlink adaptive multi-rate mode desired by a single user equipment according to the downlink transmission code power of the user equipment reported by the Node B;

Step 3: The radio network controller determines the uplink and downlink adaptive multi-rate mode that a single user equipment should adopt according to the results of steps 1 and 2.

Step 4. Compare the uplink and downlink adaptive multi-rate modes determined in step 3 with the current uplink and downlink adaptive multi-rate modes. If the uplink adaptive multi-rate modes are different, control frames are transmitted to the user equipment through the transmission format of the control plane. Send an adaptive multi-rate mode adjustment command; if the downlink adaptive multi-rate mode is different, send an adaptive multi-rate mode adjustment command to the core network side through the user plane's speed control frame; if the uplink and downlink adaptive multi-rate modes are the same , Then no adjustment command is sent.

The invention adjusts the adaptive multi-rate speech coding mode based on the actual transmission power, which can well ensure the effective implementation of the speech AMR adjustment required by the WCDMA system, and improve the signal quality of the user communication in an optimal way as much as possible. The transmission power of the small UE maximizes the system capacity, and the logic is reasonable and efficient.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a flowchart of an AMR mode adjustment method according to the present invention;

FIG 2 is a flowchart of the value of M _u upstream direction determination system AMR mode restriction; FIG. 3 is a flowchart of determining an AMR mode limit value M _{D in} a system downlink direction;

FIG. 4 is a flowchart of adjusting the AMR mode in the uplink direction;

Fig. 5 is a flowchart for adjusting the AMR mode in the downlink direction.

detailed description

The technical solution of the present invention is described in further detail below with reference to the drawings and embodiments.

In the existing method for controlling the AMR mode, the parameters required for the control cannot truly represent the current wireless environment of the UE; and if a power-based processing method is used, the wireless status of the UE can be tracked in real time, This is because under the action of closed-loop power control, the power can be adjusted 15 times every 10 milliseconds. Therefore, the present invention proposes a speech AMR rate adjustment method based on actual transmission power.

The present invention makes full use of the measurement results on the UE and the Node B (ode B) in the WCDMA system, and determines the uplink and downlink based on the reported uplink and downlink load conditions in the radio network controller (Radio Network Controller, RNC). Allowable limit AMR mode, and then comprehensively decide whether to adjust the AMR mode according to the transmit power of the UE and the transmit code power of the Node B to the UE.

In the 3GPP TS 25.331 specification, it is stipulated that in the WCDMA system, the measurement report of the UE and the measurement report of the Node B can be selected in two ways: periodic reporting and event-triggered reporting. For the periodic reporting method, the RNC compares and judges the reported measurement results with a preset threshold; for the event-triggered reporting method, the measurement control command sent to the UE and Node B by the RNC includes the preset Threshold. The comparison between the measurement result and the threshold is performed by the ENE and Node B. The RNC is used to determine the type of the event on the root. In the embodiment of the present invention, in the measurement control command sent by the RNC to the UE and the Node B, event-triggered reporting is used for the dedicated part, and periodic reporting is used for the public part.

The flow of the method according to the present invention is shown in FIG. 1.

Step 101: The radio network controller RNC sends measurement control commands to the UE, and simultaneously sends public and dedicated measurement control commands to the Node B. In Embodiment 1, in the measurement control command sent to the UE, N2003 / 000888 requires the UE to measure its uplink transmit power and report the event trigger when a preset condition is reached; In the common measurement control command sent to Node B, Node B is required to periodically measure and report the total broadband power received ( Received Wide Band Power (RTWP for short) and measured values of Transmitted Carrier Power (TCP for short); In the dedicated measurement control command sent to the Node B, the Node B is required to send a downlink signal to a single UE. The transmission code power is measured, and a report is triggered according to an event when a preset condition is reached. The above-mentioned measurement control command sent also includes a measurement report gap and a filter coefficient.

Step 102: After receiving the control command sent by the RNC, the UE performs measurement according to specific measurement requirements, and reports the measurement result when the reporting conditions are met. After receiving the common measurement control command from the RNC, Node B performs measurement according to the requirements and reports the results when the reporting time comes. After receiving the dedicated measurement control command from the RNC, Node B performs measurement according to the requirements, and reports the measurement results when the reporting conditions are met.

Step 103: After receiving the report result, the RNC stores the uplink transmit power event reported by the UE and the downlink transmit code power event reported by Node B, and stores the RTWP measurement values and TCP measurement values related to each cell reported by Node B. RTWP is the amount that directly reflects the uplink interference situation of the cell, and TCP is the amount that directly reflects the downlink transmission power of the cell. Therefore, under the conditions determined by the cell plan, the above two measured values can respectively represent the uplink and downlink load of a cell.

Step 104: According to the cell load information, that is, the RTWP value and the TCP value, determine the uplink and downlink limit AMR modes respectively. The upper limit of the AMR mode allowed for the uplink is determined according to the original uplink limit AMR mode of the cell and the current RTWP value, and the upper limit of the AMR mode allowed for the downlink is determined according to the original downlink limit AMR mode of the cell and the current TCP value.

Step 105: If a power event reported by a single UE and a downlink transmission code power event reported by a Node B are received, the RNC determines an uplink AMR mode desired by the UE according to the uplink transmission power event, and The downlink transmit code power event determines the downlink AMR mode desired by the UE.

Step 106: According to the limit AMR mode obtained in step 104 and the AMR mode desired by a single UE obtained in step 105, finally determine a new uplink and downlink AMR mode that a single UE should adopt.

Step 107: Compare the new uplink-downlink AMR mode obtained in step 106 with the original uplink-downlink AMR mode. If the original AMR mode is consistent with the original AMR mode, the A-set adjustment command is not required to be sent. AMR mode adjustment: For adjustment in the uplink direction, an adjustment command will be sent to the UE through the control plane's transmission format combination control frame; for adjustment in the downlink direction, an adjustment command will be sent to the core network side through the user plane's rate control frame.

After step 104, after determining the upper limit of the AMR mode allowed for the uplink and downlink of the cell, first determine whether the current uplink and downlink fine R mode of each UE is greater than the upper limit of the AMR mode allowed for the uplink and downlink; if the current uplink AMR mode is greater than the uplink of the cell The upper limit of the allowed AMR mode is to send an adjustment command to the UE to adjust the current uplink AMR mode to the upper limit of the cell AMR mode allowed by the transmission format control frame of the control plane; if the current downlink AMR mode is greater than the R mode of the cell downlink allowed The upper limit, the user plane's speed control frame is sent to the core network side to adjust the current downlink AMR mode to the cell downlink allowable upper limit AMR mode adjustment command; if the current uplink and downlink AMR mode is not greater than the uplink and downlink allowed A away mode Upper limit, no adjustment command is sent. '

FIG. 2 is a flowchart for determining the limit value of the AMR mode allowed in the uplink, corresponding to step 104 in FIG. 1. Details are as follows:

First queries the current uplink AMR mode cell Mu limit value (step 201), then the RNC judges whether the obtained value of RTWP within a normal range (step 202), i.e., satisfies R _d ≤RTWP≤R _u, where ^ represents The power threshold when the uplink AMR coding rate is adjusted up represents the power threshold when the uplink AMR coding rate is reduced. If so, the limit value Mu of the uplink AMR mode is not changed (step 204). If the value of RTWP is not within the above range, further determine whether the value of RTWP is N2003 / 000888 is greater than the lowering threshold ^ (step 203), if it is greater than the lowering threshold and the current AMR mode limit value Mu is not the minimum allowable mode value provided by the system, then lower the AMR mode limit value and decrease the Mu value by 1 ( Step 205); otherwise, if the value of RTWP is less than the upper threshold ^, and the current AMR mode limit value Mu is not the maximum allowable mode value provided by the system, increase the limit value of the AMR mode and increase the Mu value by 1 (step 206) .

FIG. 3 is a flowchart of determining a limit value of a downlink AMR mode, which corresponds to step 104 in FIG. 1. ^ 口口：

First, the limit value Md of the current downlink AMR mode of the cell is queried (step 301). Then determine whether the TCP value obtained by the RNC is within a normal range (step 302), that is, whether it meets ≤21 ^ ≤7, where r _d represents the power threshold when the downlink AMR coding rate is increased, and Γ „represents the downlink AMR coding rate The power threshold during the downward adjustment. If it is satisfied, the limit value Md of the downlink AMR mode is not changed (step 304); if TCP is not within the above range, it is further judged whether the TCP value is greater than the lower threshold 7 (step 303), if Greater than the downward adjustment threshold value 7; and if the downstream AMR mode limit value Md is not the minimum allowable mode value provided by the system, the downstream AMR mode limit value is reduced and the Md value is reduced by 1 (step 305). Otherwise, if the TCP value is less than the upward adjustment door If the limit value is 7 and the limit value Md of the downlink AMR mode is not the maximum allowable mode value provided by the system, the limit value of the downlink AMR mode is increased, and the value of Md is increased by 1 (step 306).

FIG. 4 is an adjustment flowchart of the uplink AMR mode, corresponding to steps 105, 106, and 107 in FIG. The companion is as follows:

In this embodiment, the uplink transmission power reported by the UE is triggered by an event. Therefore, if the RNC does not receive the event reported by the UE, it does not perform any operation. After receiving the event reported by the UE (step 401), first check whether the UE is in a soft handover state, and if so, do not adjust its uplink A mode; or determine this comprehensively according to the AMR limit mode of the relevant cell. AMR mode of the UE, such as the one that uses the minimum mode among the uplink limit modes allowed by multiple cells connected to the UE Adjust within the range, that is, take the minimum value of the uplink limit mode of multiple cells as the comprehensive limit mode. If the current uplink AMR mode does not exceed this comprehensive limit mode, you can adjust it; The smallest AMR mode that can be used in the system. If the UE is not in a soft handover state, the RNC queries to obtain the current uplink AMR mode value Nu of the UE, and then judges the uplink transmit power event reported by the UE. If the event indicates that the uplink transmit power of the current UE is too large

(Step 402), then continue to determine whether the current uplink AMR mode is the minimum AMR mode provided by the system (step 404), if not, then lower the current uplink R mode by one level (step 406), that is, subtract 1 from Nu to obtain a single UE The desired uplink AMR mode value; if the current uplink R mode is already the minimum AMR mode, no adjustment is performed (step 407). If the event indicates that the uplink transmit power of the current UE is too small

(Step 403), then continue to determine whether the current uplink AMR mode is the maximum AMR mode provided by the system (step 405), if not, then increase the current uplink AMR mode by one level (step 408), that is, increase Nu by 1 to obtain a single UE The desired uplink AMR mode value; if the current uplink A mode is already the maximum AMR mode, no adjustment is performed (step 407).

Through the above steps, the uplink AMR mode value Nu desired by a single UE can be obtained, and then compared with the uplink allowable AMR mode limit value Mu obtained in FIG. 2 (step 409). If the Nu value is greater than the Mu value, the single UE The uplink AMR mode value to be used is Mu (step 410); if the Nu value is less than or equal to the Mu value, the uplink R mode value to be used by a single UE is Nu (step 411). Finally, compare the determined uplink AMR mode that should be adopted by a single UE with the uplink AMR mode of the current UE. If the two are different, then send an adjustment command to the UE through the control plane transmission format control frame (step 412); if they are the same, then No adjustment command is sent.

FIG. 5 is a flowchart of adjusting a downlink AMR mode, corresponding to steps 105, 106, and 107 in FIG. Details are as follows:

In this embodiment, the Node B reports the downlink transmit code power of a single UE using event triggering. It is reported that if the RNC does not receive the event reported by the Node B dedicated measurement, it will not perform any operation. After receiving the downlink transmit code power event of the UE reported by the Node B (step 501), first query whether the UE is in a soft handover state, and if so, do not adjust its downlink AMR mode; or according to the AMR of the relevant cell Limit mode to comprehensively determine the AMR mode of this UE. For example, it adopts the principle of adjusting the minimum mode among the downlink limit modes allowed by multiple cells connected to the UE. The minimum value is used as the comprehensive limit mode. If the current downlink adaptive multi-rate mode does not exceed this comprehensive limit mode, it can be adjusted; or the current downlink AMR mode can be reduced to the minimum AMR mode that can be used in the system. If the UE is not in a soft handover state, query the UE's current downlink AMR mode value M, and then discriminate the reported downlink transmit code power event. If the event indicates that the current downlink transmit power is too high (step 502), then continue to determine whether the current downlink AMR mode is the minimum downlink AMR mode provided by the system (step 504), and if not, the current downlink AMR mode is downgraded by one level (step 506), that is, Nd is decremented by 1 as the downlink AMR mode value desired by a single UE; if the current downlink AMR mode is already the minimum mode provided by the system, no adjustment is performed (step 507). If the event indicates that the current downlink transmit power is too small (step 503), then continue to determine whether the current downlink AMR mode is the maximum R mode provided by the system (step 505), and if not, increase the current downlink AMR mode by one level (step 508) ), That is, Nd is increased by 1 as the downlink AMR mode value desired by a single UE; if it is already the maximum AMR mode provided by the system, no adjustment is performed (step 507).

Through the above steps, the downlink AMR mode value M desired by a single UE can be obtained, and then compared with the downlink allowed AMR mode limit value Md obtained through FIG. 2 (step 509). If the Nd value is greater than the Md value, the single UE The value of the downlink AMR mode to be used is Md (step 510); if the value of Nd is less than or equal to the value of Md, the value of the downlink AMR mode to be used by a single UE is Nd (step 511). Finally, compare the determined downlink AMR mode that a single UE should adopt with the downlink AMR mode of the current UE. If the two are different, an adjustment command is sent to the core network side through a speed control frame on the user plane (step

512); if they are the same, no adjustment command is sent.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technology of the present invention can be Modifications or equivalent replacements of the solutions without departing from the spirit and scope of the technical solutions of the present invention should be covered by the claims of the present invention.

Claims

Claim

1. A method for adjusting an adaptive multi-rate speech coding mode, characterized in that the radio network controller determines the limit of the adaptive multi-rate mode allowed by the uplink and downlink according to the reported uplink and downlink load conditions of the cell, and then according to the uplink of the user equipment The transmit power situation and the downlink transmit code power situation of the Node B determine the uplink and downlink adaptive multi-rate mode that a single user equipment wishes to adopt, and finally comprehensively determine whether to adjust the uplink and downlink adaptive multi-rate mode.

2. The method for adjusting an adaptive multi-rate speech coding mode according to claim 1, wherein the uplink load condition of the cell is described by receiving the total bandwidth power; and the downlink load condition is described by the transmit carrier power.

3. The method for adjusting an adaptive multi-rate speech coding mode according to claim 2, wherein the adjustment method specifically includes the following steps:

Step 3: The radio network controller determines an uplink and downlink adaptive multi-rate mode to be used by a single user equipment according to the results of steps 1 and 2.

4. The method for adjusting an adaptive multi-rate speech coding mode according to claim 3, further comprising the following steps between the first step and the second step: determining the current uplink and downlink of each user equipment Whether the adaptive multi-rate mode is greater than the upper limit of the adaptive multi-rate mode allowed by the uplink and downlink; if the current uplink adaptive multi-rate mode is greater than the upper limit of the adaptive multi-rate mode allowed by the cell uplink, the frame direction is controlled by the transmission format of the control plane The user equipment sends an adjustment command that adjusts the current uplink adaptive multi-rate mode to the upper limit of the cell allowed by the adaptive multi-rate mode. If the current downlink adaptive multi-rate mode is greater than the upper limit of the adaptive multi-rate mode allowed by the cell, it passes the The user plane's speed control frame sends an adjustment command to the core network side to adjust the current downlink adaptive multi-rate mode to the upper limit of the cell downlink allowable adaptive multi-rate mode; if the current uplink-downlink adaptive multi-rate mode is not greater than the uplink and downlink allowable Upper limit of the adaptive multi-rate mode, no Adjustment command.

5. The method for adjusting an adaptive multi-rate speech coding mode according to claim 3 or 4, wherein the radio network controller obtains a received total broadband power, a transmit carrier power, an uplink transmit power of a user equipment, and a node. The step of B transmitting the downlink transmission code power of the user equipment includes: the radio network controller sends a measurement control command to the user equipment to measure the uplink transmit power; the radio network controller sends a common measurement to the node B to measure the total received wideband power and transmit carrier power A control command that sends a dedicated measurement control command that measures the downlink transmit code power of a single user equipment; the user equipment measures its uplink transmit power, and reports the measurement result to the wireless network controller according to the specified reporting method;

Node B measures the total received broadband power and transmit carrier power, and reports the measurement results to the wireless network controller according to the specified reporting method;

Node B measures the downlink transmission code power of a single user equipment and reports the measurement result to the radio network controller according to the specified reporting method;

After the radio network controller receives the measurement result, it performs corresponding storage.

6. The method for adjusting an adaptive adaptive multi-rate speech coding mode according to claim 5, wherein a measurement report reporting method of the user equipment can select a periodic reporting method or an event triggering reporting method, and the node The measurement and reporting method of B can be selected from the periodic reporting method or the event-triggered reporting method. For the periodic reporting method, the wireless network controller compares and judges the reported measurement results with a preset threshold; and the event-triggered reporting Method, the measurement control command sent to the user equipment and the Node B by the radio network controller includes a preset threshold, and the user equipment and the Node B complete the comparison between the measurement result and the threshold, and the radio network controller is used to judge the reported Event type.

7. The method for adjusting an adaptive multi-rate speech coding mode according to claim 5, wherein the user equipment reports uplink transmission power in an event-triggered reporting manner; and the Node B reports reception in a periodic reporting manner. Total broadband power and transmit carrier power; the Node B reports downlink transmit code power in an event-triggered reporting manner.

8. The method for adjusting an adaptive multi-rate speech coding mode according to claim 7, wherein in the first step, the radio network controller determines an upper limit of the adaptive multi-rate mode allowed according to the received total broadband power. It further includes the following steps:

Query the limit value of the cell's current uplink adaptive multi-rate mode;

Determine whether the total received wideband power value is between [Rd, Ru], where Rd is the power threshold when the uplink adaptive multi-rate coding rate is increased, and Ru is the power threshold when the uplink adaptive multi-rate coding rate is decreased;

If the total received broadband power value is between [Rd, Ru], the upper limit of the adaptive multi-rate mode allowed in the uplink is the limit value of the current uplink adaptive multi-rate mode;

If the received total wideband power value is not between [Rd, Ru], determine whether the received total wideband power value is less than Rd. If it is less than, determine whether the limit value of the current uplink adaptive multi-rate mode is the maximum adaptive multiple provided by the system. Rate mode, if not, then the current uplink adaptive multi-rate mode The limit is increased by 1 to obtain the upper limit of the adaptive multi-rate mode allowed in the uplink; if it is, the upper limit of the adaptive multi-rate mode allowed in the uplink is the limit value of the current uplink adaptive multi-rate mode;

If the received total broadband power value is greater than Ru, determine whether the current limit value of the uplink adaptive multi-rate mode is the minimum adaptive multi-rate mode provided by the system; if not, decrease the limit value of the current uplink adaptive multi-rate mode by 1 Get the upper limit of the adaptive multi-rate mode allowed in the uplink; if it is, then the upper limit of the adaptive multi-rate mode allowed in the uplink is the limit value of the current uplink adaptive multi-rate mode.

9. The method for adjusting an adaptive multi-rate speech coding mode according to claim 7, characterized in that, in the step 1, the radio network controller determines the upper limit of the adaptive multi-rate mode allowed according to the transmit carrier power, further comprising: The following steps:

Query the limit value of the cell's current downlink adaptive multi-rate mode;

Determine whether the transmit carrier power value is between [Td, Tu], where Td represents the power threshold when the downlink adaptive multi-rate encoding rate is increased, and Tu represents the power threshold when the downlink adaptive multi-rate encoding rate is decreased;

If the transmit carrier power value is between [Td, Tu], the upper limit of the downlink adaptive multi-rate mode allowed is the limit value of the current downlink adaptive multi-rate mode;

If the transmit carrier power value is not between [Td, Tu], determine whether the transmit carrier power value is less than Td. If the transmit carrier power value is less than Td, determine whether the limit value of the current downlink adaptive multi-rate mode is the maximum adaptive multi-rate mode provided by the system. If not, the limit value of the current downlink adaptive multi-rate mode is increased by 1 to obtain the upper limit of the adaptive multi-rate mode allowed in the downlink; if it is, the upper limit of the adaptive multi-rate mode allowed in the downlink is the current downlink adaptive Limit value of multi-rate mode

If the transmit carrier power value is greater than Tu, determine whether the limit value of the current downlink adaptive multi-rate mode is the minimum adaptive multi-rate mode provided by the system. If not, the current downlink adaptive multi-rate mode is determined. Decrease the limit value of the rate mode by 1 to obtain the upper limit of the adaptive multi-rate mode allowed in the downlink; if so, the upper limit of the adaptive multi-rate mode allowed in the downlink is the limit value of the current downlink adaptive multi-rate mode.

10. The method for adjusting an adaptive multi-rate speech coding mode according to claim 7, wherein in the step 2, the radio network controller determines the uplink desired by a single user equipment according to the uplink transmit power reported by the user equipment. The adaptive multi-rate mode includes the following steps:

Query whether the user equipment is currently in a soft handover state;

If it is in a soft handover state, its uplink adaptive multi-rate mode is not adjusted;

If it is not in the soft handover state, query the current uplink adaptive multi-rate mode value of the user equipment; determine whether the event reported by the user equipment indicates that the uplink transmit power is high, and if it is high, determine whether the current uplink adaptive multi-rate mode value is Is the minimum adaptive multi-rate mode provided by the system; if not, the value of the uplink adaptive multi-rate mode desired by the user equipment is reduced by 1 from the current uplink adaptive multi-rate mode value of the user equipment; if it is, the uplink desired by the user equipment is The adaptive multi-rate mode value is the current uplink adaptive multi-rate mode value of the user equipment;

If the event reported by the user equipment indicates that the uplink transmit power is low, determine whether the current uplink adaptive multi-rate mode value is the maximum adaptive multi-rate mode provided by the system; if not, the uplink adaptive multi-rate mode value that the user equipment desires Add 1 to the current uplink adaptive multi-rate mode value of the user equipment; if it is, the value of the uplink adaptive multi-rate mode desired by the user equipment is the current uplink adaptive multi-rate mode value of the user equipment.

11. The method for adjusting an adaptive multi-rate speech coding mode according to claim 10, wherein, when the user equipment is in a soft handover state, the uplink of the user equipment is determined according to a limit of an adaptive multi-rate mode of a cell. Adaptive multi-rate mode, that is, the minimum value of the uplink limit mode of multiple cells is taken as the comprehensive limit mode. If the current uplink adaptive multi-rate mode does not exceed this comprehensive limit Mode can be adjusted.

12. The method for adjusting an adaptive multi-rate speech coding mode according to claim 10, wherein, when the user equipment is in a soft handover state, the current uplink adaptive multi-rate mode is reduced to a minimum adaptation provided by the system. Multi-rate mode.

13. The method for adjusting an adaptive multi-rate speech coding mode according to claim 7, characterized in that the radio network controller determines the downlink transmission rate desired by the single user equipment according to the downlink transmission code power of the single user equipment reported by the Node B. Adapting to multi-rate mode includes the following steps:

Query whether the user equipment is currently in a soft handover state;

If it is not in the soft handover state, query the current downlink adaptive multi-rate mode value of the user equipment; determine whether the downlink transmit code power event reported by Node B indicates that the current downlink transmit power is high, and if it is high, determine the current uplink adaptive Whether the multi-rate mode value is the minimum adaptive multi-rate mode provided by the system; if not, the value of the downlink adaptive multi-rate mode desired by the user equipment is the current downlink adaptive multi-rate mode value of the user equipment minus 1; if it is, the user The downlink adaptive multi-rate mode value desired by the device is the current downlink adaptive multi-rate mode value of the user equipment;

If the downlink transmit code power event reported by Node B indicates that the current downlink transmit power is low, then determine whether the current downlink adaptive multi-rate mode value is the maximum adaptive multi-rate mode provided by the system. If not, the downlink The value of the adaptive multi-rate mode is the current downlink adaptive multi-rate mode value of the user equipment plus 1; if it is, the value of the downlink adaptive multi-rate mode desired by the user equipment is the current downlink adaptive multi-rate mode value of the user equipment.

14. The method for adjusting an adaptive multi-rate speech coding mode according to claim 13, wherein when the user equipment is in a soft handover state, the downlink of the user equipment is determined according to a limit of an adaptive multi-rate mode of a cell. Adaptive multi-rate mode, that is, the The minimum value is used as the comprehensive limit mode. If the current downlink adaptive multi-rate mode does not exceed this comprehensive limit mode, it can be adjusted.

15. The method for adjusting an adaptive multi-rate speech coding mode according to claim 13, wherein, when the user equipment is in a soft handover state, the current downlink adaptive multi-rate mode is reduced to a minimum adaptation provided by the system. Multi-rate mode.

16. The method for adjusting an adaptive multi-rate speech coding mode according to claim 7, characterized in that in the step 3, the radio network controller determines that a single user equipment should use the result of the steps 1 and 2. The uplink adaptive multi-rate mode includes the following steps:

The upper limit of the adaptive multi-rate mode allowed in the uplink is compared with the uplink adaptive multi-rate mode desired by the user equipment; if the uplink adaptive multi-rate mode desired by the user equipment is greater than the upper limit of the adaptive multi-rate mode allowed in the uplink, a single The uplink adaptive multi-rate mode that the user equipment should adopt is the upper limit of the adaptive multi-rate mode allowed by the uplink; if the uplink adaptive multi-rate mode desired by the user equipment is less than or equal to the upper limit of the adaptive multi-rate mode allowed by the uplink, then The uplink adaptive multi-rate mode that a single user equipment should adopt is the uplink adaptive multi-rate mode desired by the user equipment.

17. The method for adjusting an adaptive multi-rate speech coding mode according to claim 7, characterized in that in the step 3, the radio network controller determines that a single user equipment should adopt according to the results of steps 1 and 2. The downlink adaptive multi-rate mode includes the following steps:

The upper limit of the adaptive multi-rate mode allowed in the downlink is compared with the downlink adaptive multi-rate mode desired by the user equipment; if the user equipment wants the downlink adaptive multi-rate mode to be greater than the upper limit of the adaptive multi-rate mode allowed in the downlink, a single The downlink adaptive multi-rate mode that the user equipment should adopt is the upper limit of the adaptive multi-rate mode allowed by the downlink; if the downlink adaptive multi-rate mode desired by the user equipment is less than or equal to the upper limit of the adaptive multi-rate mode allowed by the downlink, a single The downlink adaptive multi-rate mode to be adopted by the user equipment is a downlink adaptive multi-rate mode desired by the user equipment.