WO2008014653A1 - Method and device for insuring user qos of special line in reverse link in wireless communication system - Google Patents

Abstract

A method for insuring the user QoS of special line in a reverse link in a wireless communication system comprises the following steps: a packet length corresponding of the terminated target of the special line user in the reverse link is determined; the acquired ranges of the min value (TxT2Pmin) and max value (TxT2Pmax) of the Traffic Channel to Pilot Channel transmit power ratio are determined; the TxT2Pmin andTxT2Pmax are set in the acquired ranges; the permitted packet length of the current transmitted data packet is set to more than the determined packet length corresponding of the terminated target of the special line user in the reverse link or equal of it, and the reverse packet is encapsulated according to the permitted packet length; the encapsulated reverse packet is transmitted according to the set TxT2Pmin and TxT2Pmax. A device in a wireless communication system for insuring the user QoS special line in a reverse link. The present invention could insure the user QoS of special line in a reverse link in a wireless communication system, fix the reverse ratio of the special line user in a subscribed bandwidth, and bear various services under the limitation of the subscribed bandwidth.

Description

 Method and device for guaranteeing service quality of private line users in reverse in wireless communication system

Technical field

 The present invention relates to the field of wireless communication technologies, and in particular, to a method and apparatus for guaranteeing the quality of service of a private line user in a wireless communication system. Background of the invention

 At present, the processing method of the traffic channel to the power channel (T2P, Traffic Channel to Pilot Channel transmit power ratio) in the wireless communication system is that the CDMA2000 lx only supports the evolved version of the data service (EVDO, Evolution Data Only). The core processing method of subtype 3 of the reverse traffic channel Medium Acess Control (RTC MAC). In the CDMA2000 EV-DO RevA system, the concept of flow is introduced. Because different flows have different levels and different quality of service (QoS) requirements, the prior art adopts a leaky bucket. The processing method is to schedule the flow, and each flow has a storage unit similar to the leaky bucket to store the resources. As shown in Figure 1, T2PInflow indicates that the T2P resource injected into the leaky bucket storage unit is the current available T2P resource; PotentialT2POutflow is the potential T2P resource that can be obtained in the current subframe; and T2POutflow represents the T2P resource that actually flows out after the evaluation process. That is, the T2P resource that is actually allocated to the user; BucketLevel indicates the current state of the leaky bucket, which is equal to the current accumulated T2P resource of the leaky bucket, and BucketLevelSat indicates the maximum amount of T2P resources that the leaky bucket can accommodate. The T2P processing method schedules each stream by continuously updating the leaky bucket.

As shown in Figure 1, a high-level stream has more T2P resources, can be scheduled faster, can occupy more bytes in a physical layer packet, and can improve the level of the entire physical layer packet. Therefore, a higher level of T2P is used for transmission, so the corresponding hybrid automatic repeat request (HARQ) is fewer and the delay is smaller. Simply put, the T2P processing method can implement reverse rate scheduling, determine the packet length that the current subframe should send, the transmission mode of the transmitted packet, and the power of the packet. This processing method can achieve in-user quality of service (QoS).

 However, the current T2P processing method cannot implement the leased line user mechanism in the reverse direction. The current T2P processing methods are based on the principle of efficiency and fairness. The parameter configuration is to achieve different priorities of different flows within the user, and does not consider priorities among users. The dedicated line user mechanism not only emphasizes the different priorities of different streams within the user, but also emphasizes the priority between users. The dedicated line users are required to be online at any time, and the request access system will be allowed at any time; the dedicated line user will sign the contract when opening an account. , you need to ensure that the service you get has a stable bandwidth. Therefore, the simple use of the T2P processing method in the prior art cannot implement the dedicated line user mechanism. Summary of the invention

 The embodiments of the present invention provide a method and a device for guaranteeing the quality of service of a private line user in a wireless communication system, so that the rate of the private line user in the reverse direction is relatively stable within the subscription bandwidth.

 The main technical solutions provided by the embodiments of the present invention are:

 A method for implementing a private line user mechanism in a reverse direction in a communication system, the method comprising:

 Determining the packet length corresponding to the termination target of the reverse private line user;

 Determining a range of values of the minimum and maximum values of the transmitted power channel energy relative to the pilot channel power gain T2P; setting the minimum and maximum values of the T2P within the range of values;

 Setting an allowable packet length of the currently sent data packet to be greater than or equal to a packet length corresponding to the termination target determined by the reverse private line user, and forming a reverse packet according to the allowed packet length;

 The reverse packet is sent according to the minimum and maximum values of the set T2P.

 A method for implementing a fixed rate in a reverse direction in a communication system, the method comprising: determining a packet length corresponding to a termination target of a reverse user;

 Determining a range of values of the minimum and maximum values of the transmitted power channel energy relative to the pilot channel power gain T2P;

Setting the growth step and falling step size of T2P makes the T2P resource injected into the leaky bucket storage unit constant. A method for implementing a fixed rate in a reverse direction in a communication system, the method comprising: Determining the packet length corresponding to the termination target of the reverse user;

 Determining a range of values of the minimum and maximum values of the transmitted power channel energy relative to the pilot channel power gain T2P;

 Using the centralized/predetermined resource allocation mode of the base station, sending a message to the terminal, specifying the 注入 resources injected into the leaky bucket storage unit, the T2P resource amount currently accumulated by the leaky bucket storage unit, and the T2P resource and the leaky bucket storage injected into the leaky bucket storage unit. The time when the current accumulated T2P resource amount of the unit continues to act, and the potential T2P resource obtained from the leaky bucket storage unit is set to be greater than or equal to the minimum value of the T2P resource.

 A device for implementing a dedicated line user mechanism in a reverse direction in a communication system, comprising the following four modules, wherein

 Module one, configured to determine a packet length corresponding to a termination target of the reverse dedicated line user;

 Module 2, determining a range of values of a minimum value and a maximum value of a power channel T2P of the transmitted traffic channel energy relative to the pilot channel; setting a minimum value and a maximum value of the T2P within the value range; And configured to set an allowable packet length of the currently sent data packet to be greater than or equal to a packet length corresponding to the termination target determined by the reverse private line user, and form a reverse packet according to the allowed packet length;

 Module 4, for transmitting the reverse packet formed according to the minimum value and the maximum value of the set T2P. A device for implementing a fixed rate in a reverse direction in a communication system includes the following three modules: Module 1 is configured to determine a packet length corresponding to a termination target of a reverse user;

 Module 2, determining a range of values of the minimum value and the maximum value of the transmitted power channel energy relative to the pilot channel power gain T2P;

 Module 3, used to set the growth step and the descending step of the T2P to make the T2P resource injected into the leaky storage unit constant.

 A device for implementing a fixed rate in a reverse direction in a communication system includes the following three modules: Module 1 is configured to determine a packet length corresponding to a termination target of a reverse user;

Module 2, determining a value range of a minimum value and a maximum value of the power channel T2P of the transmitted traffic channel energy relative to the pilot channel; Module 3, configured to use a centralized/predetermined resource allocation mode of the base station, send a message to the terminal, specify a T2P resource injected into the leaky bucket storage unit, a T2P resource currently accumulated in the leaky bucket storage unit, and a T2P resource injected into the leaky bucket storage unit. And the time when the T2P resource amount currently accumulated by the leaky bucket storage unit continues to act, and the potential T2P resource obtained by the current reverse packet from the leaky bucket storage unit is set to be greater than or equal to the minimum value of the T2P resource.

 The method according to the embodiment of the present invention performs special setting on the RL MAC parameters, and uses these parameters to perform packet sending, thereby implementing a mechanism for the reverse dedicated line user, so that the dedicated line user can stably sign the contract when the data source is sufficient. Bandwidth; In the case that the data source is insufficient, the user does not assemble large packets and waste resources; when a dedicated line user carries multiple services at the same time in the subscription bandwidth, the access terminal (AT, Access Terminal) The RL MAC attribute configured for each flow according to the access network (AN, Access Network) is scheduled, and the subscription bandwidth is shared, that is, the intra-usei' priority is reflected. Embodiments of the present invention can achieve different reverse maximum rates and reverse average rates for different levels of dedicated line users. On the one hand, it can meet the needs of different end users; on the other hand, it can provide network operators with quality of service (QoS) solutions for level-based charging services, which can meet the needs of different users while improving operational revenue. BRIEF DESCRIPTION OF THE DRAWINGS

 FIG. 1 is a schematic diagram of scheduling a flow using a leaky bucket storage unit.

 2 is a flow chart of a method described in an embodiment of the present invention.

 FIG. 3 is a schematic diagram of transmission of a user data packet according to an embodiment of the present invention.

 FIG. 4 is a schematic diagram of the value of T2P during each PS (Packet Size) transmission according to an embodiment of the present invention.

 FIG. 5 is a schematic diagram of transmitting data packets at different times according to an embodiment of the present invention.

 Figure 6 is a schematic diagram showing the coordinate system of the BucketFactor function according to an embodiment of the present invention.

Figure 2 is a schematic diagram of a base station and an access terminal device of a CDMA2000 EV-DO RevA system according to an embodiment of the present invention. 8 is a schematic diagram showing the composition of a data configuration module of a base station of a CDMA2000 EV-DO RevA system according to an embodiment of the present invention.

 FIG. 9 is a schematic diagram of a packet selection process of a dedicated line user and a normal user when a data source is sufficient according to the method of the embodiment of the present invention.

 FIG. 10 is a schematic diagram of a packet selection process of a dedicated line user and an ordinary user when the data source is insufficient in the method of the embodiment of the present invention. Mode for Carrying Out the Invention The present invention will be further described in detail by way of specific examples and the accompanying drawings.

 The method according to the embodiment of the present invention implements a reverse user dedicated line mechanism by using T2P rate control based on the RTC MAC subtype 3 protocol.

 2 is a flowchart of a method according to an embodiment of the present invention. Referring to FIG. 2, the process includes: Step 201: Determine a packet length of a reverse private line user.

 Specifically, the base station searches for the subscription information of the user, according to the user's subscription bandwidth and configuration mode, including a high-capacity (HiCap, High Capacity) mode and a low-latency (LoLat, Low Latency) mode, at a preset reverse traffic channel rate and The packet length PS corresponds to the packet length corresponding to the termination bandwidth of the subscription bandwidth and the configuration mode.

 Table 1 shows the reverse traffic channel rate and the payload table. The value in the table is directly used in the embodiment of the present invention, but the method for calculating the value of the table is well known in the art, and details are not described herein.

 Minimum packet length Maximum packet length Effective bandwidth (kbps)

 ( bit ) ( bit ) transmission duration transmission duration transmission duration transmission duration

 1 subframe 2 subframe 3 subframe 4 subframe

 1 96 19.2 9.6 6.4 4.8

97 224 38.4 19.2 12.8 9.6

225 480 76.8 38.4 25.6 19.2

481 736 115.2 57.6 38.4 28.8 737 992 153.6 76.8 51.2 38.4

 993 1504 230.4 115.2 76.8 57.6

1505 2016 307.2 153.6 102.4 76.8

2017 3040 460.8 230.4 153.6 115.2

3041 4064 614.4 307.2 204.8 153.6

4065 6112 921.6 460.8 307.2 230.4

6113 8160 1228.8 614.4 409.6 307.2

8161 12256 1843.2 921.6 614.4 460.8

 Table 1

 In the RTC MAC subtype 3 protocol, T2P is used for rate control, and the rate of each user's different streams is determined according to its T2P resources and current channel conditions. For dedicated users, when the data resources are sufficient, the rate is basically stable at a certain bandwidth. On the premise of a certain termination target, by setting the power parameter, the reverse packet can be correctly demodulated when the target is terminated. The reverse rate corresponds to the reverse packet length PS, and the rate is stabilized at a certain bandwidth. The conversion is such that the packet length for each schedule is constant. The termination target differs according to the user mode configuration. For example, the default configuration of the protocol is a low delay mode, and the termination target is 2 frames; and the termination target of the high capacity mode is 4 frames.

 For example, the subscription bandwidth of a dedicated line user is 450 kbps, and the average transmission duration is 2 frames. The configuration mode is low delay mode. The default destination of the mode is 2 frames. Table 1 shows that the effective bandwidth is When the transmission duration is 2 subframes, the maximum packet length of the private line user's subscription bandwidth can be guaranteed to be 6112. By default, 32-bit redundancy information is added, and the actual corresponding packet length is 6144.

 Step 202: The value range of the minimum value (TxT2Pmin) and the maximum value (TxT2Pmax) of the power channel energy (TxT2P) of the pilot channel transmitted relative to the pilot channel; and TxT2Pmin and TxT2Pmax are set within the value range.

The method for determining the value range of TxT2Pmin and TxT2Pmax is specifically: in the user configuration mode, the base station takes the value of the T2P required by the packet length corresponding to the termination target in step 201 before the transition point as the value range. The minimum value is the value of the T2P required before the transition point of the high first packet length of the termination target corresponding packet length in step 201 as the maximum value of the value range. In the embodiment of the present invention, each configuration mode and corresponding to each packet length may be preset in advance.

The range of values of TxT2Pmin and TxT2Pmax is calculated and stored in the table. When determining the range of TxT2Pmin and TxT2Pmax of a packet length (for example, 6144), it is only necessary to look up the table to obtain the processing efficiency. For example: Table 2 below shows the T2P values before and after the transition point for each packet length in LoLat mode and HiCap mode.

 Table 2

 The relevant parameters involved in Table 2 are explained below:

FIG. 3 is a schematic diagram of transmission of a user data packet according to an embodiment of the present invention. Referring to FIG. 3, for each data packet PS (PS indicates packet length), it is allowed to transmit up to four times. For each packet PS, the T2P is different for each transmission, which can be understood as the power of each transmission is not the same. FIG. 4 is a schematic diagram of the value of T2P during each PS transmission according to an embodiment of the present invention. Referring to Figure 4, T2PHicapPreTransitonPS is named in this variable, T2P indicates that the variable is a T2P value, which can be understood as a power value; Hicap indicates High Capacity mode; PreTransition indicates before the transition point; PS table Show the package length. T ² PHicapPreTmnsitonPS is connected: In High Capacity mode, the packet length PS is T2P before the transition point.

 Similarly, the T2PHicapPostTransitonPS variable means: In High Capacity mode, the packet length PS is T2P after the transition point. The conversion point is the transmission when Τ2Ρ changes when the packet is sent. In Figure 4, the transition point is 2, because at the second transmission, the Τ2Ρ of the packet is changed.

 Both T2PHicapPreTransitonPS and T2PHicapPostTransitonPS are known, and for each packet length PS, there is such a set of data. As shown in table 2.

 Table 3 shows the range of values for TxT2Pmin and TxT2Pmax.

 table 3

 The values in Table 3 can be calculated from T2PLoLatPreTransitionPS, T2PLoLatPostTransitionPS, and T2PHicapPreTransitionPS, T2PHicapPostTransitionPS as described in Table 2.

Considering the power gain of the auxiliary pilot channel (Auxiliary Pilotgain), it can be preset to exist. The minimum packet length of the auxiliary pilot channel (Auxiliary PilotChannelMinPayload), assuming AuxiliaryPilotChannelMinPayload =3072, so when the transmission packet length is greater than or equal to 3072, the value of the T2P corresponding to the packet length is added to the power of the Auxiliary Pilotgain, for example, 0.26573dB here. When the length of the transmitted packet is less than 3072, the effect of AuxiliaryPilotgain is not increased.

 The calculation process of the values in Table 3 below is exemplified below. For the packet length less than 3072, for example, the value of Range (HC mode) in the High Capacity mode of the first row of Table 3 is the minimum value of 0, which is T2PHicapPreTransitonPS with a packet length of 128 in Table 2. The right value is the maximum value. 3.75, which is T2PHicapPreTmnsitonPS with a packet length of 256 in Table 2; the left value of Range L of the first row of LoLat mode in Table 3 is 7, which is T2PLoLatPreTransitonPS with a packet length of 128 in Table 2, and the right value is 10.0, which is a table. 2 T2PLoLatPreTransitonPS with a length of 256 in the packet; other packet lengths less than 3072 in Table 3 are analogous: for example, the value of the HiCap mode of the packet length 512 is the left value of the Range (HC mode) 7 is the T2PHicapPreTransitonPS of the packet length 512 in Table 2. The right value of 8.75 is T2PHicapPreTransitonPS with a packet length of 768 in Table 2.

 For a packet length greater than 3072, for example, 6144 packets long, the HiCap mode value range Range (HC mode) has an lvalue of 17.26573 for the T2PHicapPreTransitonPS 17.0 with a packet length of 6144 and the power value of 0.2573 for the Auxiliary Pilotgain; The right value of 18.76573 is T2PHicapPreTransitonPS 18,5 with a packet length of 8192 in Table 2, plus 0.26573, and the left value of the LoLat mode of the packet length 6144 is the T2PLoLatPreTmnsitonPS 21.75 of the packet length 6144 in Table 2. On the 0.26573; the right value is T2PLoLatPreTransitonPS 23.25 with a packet length of 8192 in Table 2 plus 0.26573. Other packet lengths greater than 3072, and so on.

In step 202, the range of TxT2Pmin and TxT2Pmax can be found from Table 3 according to the obtained packet length PS of step 201, such as [T2Prangel, T2Prange2), where T2Prangel is an lvalue, T2Prange2 is an rvalue, and TxT2Pmin >= is set. T2Prangel, TxT2Pmax < T2Prange2. Here, assuming PS = 6144, and in LoLat mode, then TxT2Pmin >= 22.01573, TxT2Pmax < 23.51573. Since TxT2Pmax is a function of pilot strength, here, The basic interpolation point of the TxT2Pmax function (TxT2Pmax can be obtained by this function) is set within the range of TxT2Pmin and TxT2Pmax, which makes it weakly correlated with the pilot strength, or even irrelevant.

 Step 203: Set a permissible packet length (PermittedPayloadPS) of the currently transmitted data packet to be greater than or equal to the packet length PS (for example, 6144) determined in step 201, and form a reverse packet according to the allowed packet length.

 The allowed packet length here should be less than the minimum value of the current packet length limit of the three packets sent before the current packet. The restrictions of the above three packets on the current packet length are: PermittedPayloadPS 1_1 , PermittedPayloadPS2_2 , PermittedPayloadPS3_3, so the value of PermittedPayloadPS 1-1, PennittedPayloadPS2_2, PermittedPayloadPS3_3 is set to be greater than or equal to the PS determined by step 201 (for example, 6144).

 Step 204: Send the reverse packet formed according to the set TxT2Pmin and TxT2Pmax. If the reverse rate of the leased line user is to be stabilized in the subscription bandwidth, the minimum value of the T2P resource injected into the leaky bucket storage unit (T2PInflow min) must be set so that T2PInflow min > T2Prangel. If you only want the dedicated line user to reach the contracted bandwidth under the conditions of the channel conditions, you do not need to make special settings for T2PInflow min.

 When a dedicated line user carries multiple services in the private line bandwidth, the AT will schedule the RL MAC attributes configured for each flow according to the AN, and share the subscription bandwidth, which reflects the priority within the private line user (intra-user). Priority ).

 In the above implementation steps, by setting TxT2Pmin, TxT2Pmax and T2PInflow min, PermittedPayload properly, the reverse dedicated line user mechanism can be implemented, including:

 1) When the data source is sufficient, the dedicated line user can stabilize the subscription bandwidth.

 2) In the case that the data source is insufficient, the user will not assemble a large package and waste resources.

3) Since the RL MAC-based protocol is used in the embodiment of the present invention, when a dedicated line user simultaneously carries multiple services in the subscription bandwidth, the AT performs scheduling according to the RL MAC attribute configured by the AN for each flow, and shares the subscription bandwidth. It reflects the intra-user priority. The latter two functions are guaranteed by the T2P algorithm provided by RTC MAC subtype3. The embodiment of the present invention may also implement only a reverse fixed rate instead of implementing a complete dedicated line user mechanism. That is to say, the update of T2PInflow is performed by two functions of T2P growth step (T2Pup) and descending step (T2Pdown), so these two functions can be set to make T2PInflow constant, thus obtaining PotentialT2POutflowi> = T2Prangel , where The subscript i indicates the i-th stream, which is equivalent to T2PInflow min > T2Prangel, and can also achieve a reverse fixed rate. For example, the output of T2Pup is always greater than T2Prangel, and the output of T2Pdown is always zero.

 The RTCMAC subtype3 protocol provides two modes of reverse scheduling, one is the distributed rate selection mode of the terminal, which is used in the above embodiment, and the other is centralized/predetermined resource allocation at the base station. (Centralized/scheduled resource allocation) mode, this embodiment may also be employed by embodiments of the present invention. In the embodiment of the present invention, by sending a grant message to the terminal, specifying T2PInflow, BucketLevel, and TT2PHold (TT2PHold, the parameter T2PInflow, the time at which the BucketLevel can continue to act), just adjust these parameters so that PotentialT2POutflowi >= T2Prangel, where the subscript i represents the i-th stream. The calculation method of PotentialT2POutflowi will be given later. There are many ways to implement it. For example, the output value of the function of setting BucketFactor is always 1, so that BucketLevel = T2Prangel, T2PInflow = T2Prangel, and TT2PHold = infinity.

 The following arguments can achieve the principle of the reverse dedicated line user mechanism through the above steps.

 1. In the case that the data source is sufficient, in order to keep the user's subscription bandwidth stable, it is necessary to prevent the power fluctuation effect, that is, the condition 1 for selecting the packet length in the existing protocol "3GPP2 C.S0024-A" needs to be satisfied, that is, the formula 1 ) :

 PS<min(PermittedPayloadPS 1-1, PermittedPayloadPS2_2,

PermittedPayloadPS3_3)

The above formula ensures that the packet length of the data packet sent at the current time does not differ too much from the packet length of the first three moments. FIG. 5 is a schematic diagram of transmitting data packets at different times according to an embodiment of the present invention. Referring to FIG. 5, PS indicates that the current time is set to time n) the length of the packet to be transmitted, and the length of the packet sent at time n-3 is PS3. The packet length sent at the nth time should satisfy: PS≤PermittedPayloadPS3-3; the packet length sent at time n-2 is PS2, and the packet length sent at the nth time should satisfy: PS<PermittedPayloadPS2-2; The length of the packet is PS1, and the length of the packet sent at the nth time should satisfy: PS≤PeraiittedPayloadPSl-l.

 Based on the above conditions, the PS is to satisfy: PS<PermittedPayloadPS3-3 and PS<PermittedPayloadPS2-2 and PS≤PermittedPayloadPSl-l. It is equivalent to: PS < min(PermittedPayloadPS 1 - 1 , PS<PermittedPayloadPS2-2 , PS<PermittedPayloadPS3-3)„

 Since it has been found from Table 1, the current PS needs to satisfy: PS>6144, and there is the following formula: 6144<PS< min(PermittedPayloadPS 1 - 1 , PS<PemiittedPayloadPS2-2 , PS<PermittedPayloadPS3-3)

 Therefore there are: min(PermittedPayloadPSl-l, PS<PermittedPayloadPS2-2, PS<PermittedPayloadPS3-3) > 6144.

2. In order to ensure that large packets are sent as much as possible, TxT2Pmin needs to be set. TxT2Pmin allows users to assemble larger packets when the sum of the PotentialT2POutlow of each stream is not high, that is, the protocol «3GPP2 C.S0024- Condition 2 of the package size determined in A», ie, formula (2): 10 ^A (TxT2PLoLatNominalPS/l 0) <

Max(10 ^A (TxT2Pmin / 10), ∑ie F(PotentialT2POutflo wi, LL))

 In formula (2), the TxT2PLoLatNorminalPS =

 Max ( T2PLoLatPreTransitonPS, T2PLoLatPostTransitonPS ) ; That is: TxT2PHicapNorn inalPS is the maximum Τ2Ρ value of the packet length PS four transmissions. As can be seen from Figure 4, when the packet length is 6144, TxT2PLoLatNorminalPS=max(T2PLoLatPreTransitonPS, T2PLoLatPostTransitonPS) = max (21.75, 17.0) = 21.75; since the packet length 6144 is already greater than 3072, in fact,

 TxT2PLoLatNorminalPS = 21.75 + 0.26573 = 22.01573.

According to formula ( 2 ), 22.01573 < max{10 ^A (TxT2Pmin I 10),

∑ieF(PotentialT2POutflowi, LL)) } , so TxT2Pmin >= 22.01573; ie TxT2Pmin The left end of the value range is 22.01573.

 3. T max controls the upper limit of the user traffic channel power, that is, the condition for determining the packet size in 3GPP2 C.S0024-A.

If PS < AuxiliaryPilotChannelMinPayload (for example, 3072), you need to satisfy: max( 10 ^A (T2PLoLatPreTransitionPS / 10), 10 ^A (T2PLoLatPostTransitionPS / 10)) < 10 ^A (T2Pmax(PilotStrengthn, s) / 10). Among them, PilotStrengthn, s is the pilot strength. The subscript n indicates the nth frame, which can be understood as the nth time, and s represents the sector. TxT2Pmax is a function of the pilot strength. Here, the basic interpolation point of the TxT ² Pmax function can be set to [ T2Prangel, T2Prange2), which makes it weakly correlated with the pilot strength, or even irrelevant.

 Like PS > AuxiliaryPilotChannelMinPayload, you need to meet: (1 +

10 ^A (Auxiliary PilotChannelGain/l 0)) x max( 10 ^A (T2PLoLatPreTransitionPS I 10), 10 ^A (T2PLoLatPostTransitionPS / 10)) < 10 ^A (TxT2Pmax(PilotStrengthn, s) / 10).

 The AuxiliaryPilotChannelGain is 0.26573.

 Since the PS is 6144 and greater than 3072 in the embodiment of the present invention, the T2Pmax is calculated to be less than 23.51573 dB according to the requirements of the condition 3.

 Condition 2 and Condition 3 are the dominant factors in determining the size of the package. In this example, when the data source is sufficient, as long as TxT2Pmin and T2Pmax are properly configured in the band of 23.01573dB, that is, the range of TxT2Pmin and T2Pmax, the dedicated line user can stabilize the contracted bandwidth of about 460.8kbps.

 4. In the case that the data source is insufficient, for example, the user currently has only 8K VoIP service, and the average bandwidth does not exceed 10 kbps. In this case, in order to prevent the user from assembling a large package and wasting resources, the principle of minimum packet needs to be met. That is, Condition 4: The packet with T2P lower than TxT2PLoLatNominalPS cannot be packetized with the following formula: No packet with lower TxT2PLoLatNominalPS is able to carry a payload of size as specified by the following equation:

 ∑ieF min(di,n , T2PConversionFactorLL x PotentialT2POutflowi, LL)

Among them, the subscript LL of T2PConversionFactorLL represents the Low Latency mode, this change The quantity is expressed as the conversion factor from T2P to packet length PS in Low Latency mode, ie: T2PConversionFactorLL = PS / T2PPS, meaning that if T2P=a, the corresponding packet length is a* T2PConversionFactorLL. In the PotentialT2POutflowi, the subscript i in the LL represents the i-th stream, and the LL represents the Low Latency mode. This variable, as shown in Figure 1, represents the potential T2P resources currently available.

 The above formula indicates that the proportion of each stream in the packet will be determined by the size of the data of each stream. '

5. However, Condition 4 also requires that the PotentialT2POutflowi cannot be too small, otherwise the constituent packets cannot contain the data in the existing queue as much as possible.

 The PotentialT2POutflowi is calculated by the following formula:

 PotentialT2POutflowi, LL = max (0, min((l + AllocationStagger rn) x

(BucketLeveli, n I 4 + T2PInflowi, n) , BucketFactori (10 loglO(T2PInflowi ₅ n), FRABn) x T2PInflowi ₅ n))

 In the above formula, AllocationStagger is a constant between 0 and 1, and m is a random number between -1 and 1. The purpose of these two variables is to introduce some randomness into the algorithm. BucketLeveli, n, See Figure 1, where the subscript i represents the i-th stream and n represents the nth moment. T2PInflowi,n is also shown in Figure 1, where the subscript i represents the i-th stream and n represents the nth moment. BucketFactori represents the BucketFactor function of the i-th stream. This function is a two-dimensional function, which is related to two variables, T2P and FRAB. The coordinate system of the function is shown in Figure 6.

Because a ^: initial T2PInflowi, n is set to T2PInflow min, if the private line user sends a packet with a larger packet length, T2POutflowi, n will be much larger than T2PInflowi, n, so BucketLeveli, n will be negative, PotentialT2POutflowi may be Zero, so you need to ensure that BucketLeveli,n is greater than zero, that is, to make T2PInflowi,n slightly larger than T2POutflowi,n, therefore, you need to set T2PInflow min slightly larger than T2POutflowi,n. If the T2PInflow min is not specially set, and the default configuration is 1.75dB, the user will intermittently select the packet length of 6144bits. This does not guarantee that the user can continue to transmit at a constant rate, but can be in good channel conditions. Under the condition, a large amount of data is transmitted at one time, which also reflects the priority of the user. It can be seen from the above discussion that the method described in the embodiment of the present invention satisfies the above five conditions required by the reverse dedicated line user mechanism, and thus the reverse dedicated line user mechanism can be implemented. In particular, the embodiment of the present invention can guarantee the quality of service of the dedicated subscribers of the CDMA2000 EV-DO RevA system in the reverse direction, so that the rate of the dedicated subscribers in the reverse direction is relatively stable within the subscription bandwidth, and can carry more than the contracted bandwidth. A service, in the contracted bandwidth, when there are multiple services at the same time, the relative priority of various services can be maintained. A schematic diagram of a base station and an access terminal device of a CDMA2000 EV-DO RevA system in accordance with an embodiment of the present invention. Referring to FIG. 7, the RL MAC parameters configured by the method in the embodiment of the present invention, such as TxT2Pmin, TxT2Pmax, PermittedPayload, and T2PInflow min, are calculated and configured in the base station operation and maintenance center; The parameter is configured by the data configuration module; the data configuration module sends the configured parameter to the primary signaling processing module of the base station software center; the primary signaling processing module sends the relevant parameter to the AT through the air interface signaling message; the AT acquires the corresponding parameter. Afterwards, these parameters are applied to the RL MAC scheduling mechanism to achieve the corresponding private line subscriber subscription bandwidth.

 The data configuration module further includes four sub-modules, as shown in FIG.

 Module 1 is used to determine the packet length corresponding to the termination target of the reverse private line user;

 Module 2 is configured to further determine a value range of a minimum value and a maximum value of the power channel T2P of the transmitted traffic channel energy relative to the pilot channel according to the packet length corresponding to the termination target of the reverse dedicated line user determined by the module, and the T2P The minimum and maximum values are set within the range of values;

 The module 3 is configured to set an allowable packet length of the currently sent data packet to be greater than or equal to a packet length corresponding to the termination target determined by the reverse private line user, and form a reverse packet according to the allowed packet length;

Module 4 is used to transmit the reverse packet formed according to the set minimum and maximum values of T2P. The simulation results using the method described in the embodiment of the present invention are given below. The simulation conditions are: 19 base stations (BTS), 57 sectors (Sector), 10 sectors per sector, or 20 users, etc. There is one dedicated line user in the whole system, one stream per user, and the transmission mode is Hicap mode. Assume that AT No. 5 is a dedicated line user, and its settings are as mentioned before. The other settings of this user are 3GPP2 C.S0024-A» The default setting, all non-line user settings are the default settings.

 FIG. 9 is a schematic diagram of a packet selection situation of a dedicated line user and an ordinary user when the data source is sufficient according to an embodiment of the present invention. FIG. 10 is a schematic diagram of a packet selection process of a dedicated line user and a normal user when the data source is insufficient according to an embodiment of the present invention. Where the abscissa is time and the ordinate is the length of the packet. In Figure 9, private line users can continuously schedule 6144bits packets, while ordinary users can only select 256bits packets. It should be noted that the embodiment of the present invention actually shields the reverse active factor bit (RAB (Reverse Active Bit), indicating that the base station is busy or idle) has an impact on the scheduling of the dedicated line user, and has a great influence on the stability of the system. Therefore, it is also necessary to strictly control the number of dedicated subscribers for each carrier frequency. It is recommended that only one dedicated subscriber exists for each carrier frequency. Figure 10 shows the selection of private line users and ordinary users when the dedicated line user data resources are insufficient (only 50 subframes are drawn here for clarity). It can be seen that when the data is insufficient, the packet will be selected, and when there is no data, the packet will not be sent.

 The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope of the present invention. All should be covered by the scope of the present invention.

Claims

Claim  A method for implementing a private line user mechanism in a reverse direction in a communication system, the method comprising:  Determining the packet length corresponding to the termination target of the reverse private line user;  Determining a range of values of the minimum and maximum values of the transmitted power channel energy relative to the pilot channel power gain T2P; setting the minimum and maximum values of the T2P within the range of values;  Setting an allowable packet length of the currently sent data packet to be greater than or equal to a packet length corresponding to the termination target determined by the reverse private line user, and forming a reverse packet according to the allowed packet length;  The reverse packet is sent according to the minimum and maximum values of the set T2P.  The method according to claim 1, wherein the step of determining a packet length corresponding to the termination target of the reverse private line user specifically includes:  The subscription information of the reverse private line user is searched, and the packet length corresponding to the termination bandwidth of the subscription bandwidth and the configuration mode is found in the preset reverse traffic channel rate and the payload table according to the user's subscription bandwidth and configuration mode.  3. The method according to claim 1, wherein the method for determining a range of values of a minimum value and a maximum value of T2P is:  In the user configuration mode, the T2P value of the packet length corresponding to the termination target of the reverse dedicated line user before the transition point is used as the left end value of the value range;  The T2P value required for the packet length of the packet length corresponding to the termination target of the reverse dedicated line user before the transition point is taken as the right end value of the value range.  The method according to claim 3, wherein the T2P minimum value is set to be greater than or equal to a left end value of the value range; and the T2P maximum value is set to be smaller than the value range. The right end value. 5. The method according to claim 3, further comprising: setting a value of a basic interpolation point of the T2P function within a range of values of the minimum and maximum values of the T2P. 6. Method according to claim 5, characterized in that the maximum value of T2P is obtained by the T2P function.  The method according to claim 1, wherein the allowable packet length of the currently transmitted data packet is less than or equal to a minimum value of a current data packet length limit of three data packets sent before the current data packet, and The minimum value of the current data packet length limit of the three data packets is set to be greater than or equal to the packet length corresponding to the termination target determined by the reverse private line user.  8. The method according to claim 1, wherein the method further comprises: storing available T2P resources for the reverse dedicated line user stream by using a leaky bucket storage unit.  The method according to claim 8, wherein the method for storing the available T2P resources for the reverse dedicated line user stream by using the leaky bucket storage unit comprises:  The minimum value of the T2P resource injected into the leaky bucket storage unit is set to be greater than the minimum value of the range of values, and the T2P resource is provided as a reverse packet according to the minimum value of the T2P resource injected into the leaky bucket storage unit.  The method according to claim 9, wherein the method for setting a minimum value of the T2P resource injected into the leaky bucket storage unit to be greater than or equal to a minimum value of the value range includes:  The minimum value of the T2P resource injected into the leaky bucket storage unit is greater than or equal to the minimum value of the range of values by setting the growth step and the descending step of the T2P.  The method according to claim 8, wherein the using the leaky bucket storage unit to store available T2P resources for the reverse private line user stream comprises:  The potential T2P resource obtained from the leaky bucket storage unit of the current reverse packet is set to be greater than or equal to the minimum value of the range of values.  The method according to claim 11, wherein the method for setting the potential T2P resource obtained by the current reverse packet from the leaky bucket storage unit to be greater than or equal to the minimum value of the value range includes: The T2P resource amount currently injected by the leaky bucket storage unit, and the T2P resource of the leaky bucket storage unit and the T2P resource currently accumulated by the leaky bucket storage unit are continued by setting a T2P resource injected into the leaky bucket storage unit. Time of action, the implementation of the current reverse packet from the leaky bucket storage unit The potential T2P resource is set to be greater than or equal to the minimum value of the range of values.  The method according to any one of claims 1 to 12, wherein the method further comprises: adding a power value of the auxiliary pilot channel to the corresponding T2P when the minimum packet length is used.  14. A method of implementing a fixed rate in a reverse direction in a communication system, the method comprising:  Determining the packet length corresponding to the termination target of the reverse user;  Determining a range of values of the minimum and maximum values of the transmitted power channel energy relative to the pilot channel power gain T2P;  Setting the growth step and falling step size of T2P makes the T2P resource injected into the leaky bucket storage unit constant. The method according to claim 14, wherein the method for determining the range of values of the minimum and maximum values of T2P is:  In the user configuration mode, the T2P value required for the packet length corresponding to the termination target of the reverse user before the transition point is the left end value of the value range;  The end user of the reverse user corresponds to the T2P value required for the high first packet length of the packet length before the transition point as the right end value of the value range.  The method according to claim 15, wherein the step of setting a growth step and a descending step of the T2P to make the T2P resource injected into the leaky bucket storage unit constant comprises:  The output of the T2P resource growth step is always greater than the left end of the range, and the output of the T2P falling step is always zero.  17. A method of implementing a fixed rate in a reverse direction in a communication system, the method comprising:  Determining the packet length corresponding to the termination target of the reverse user; Determining a range of values of a minimum value and a maximum value of the transmitted power channel energy relative to the power gain T2P of the pilot channel; Using the centralized/predetermined resource allocation mode of the base station, the terminal sends a message, specifies the T2P resource injected into the leaky bucket storage unit, the T2P resource amount currently accumulated by the leaky bucket storage unit, and the T2P resource and the leaky bucket storage unit injected into the leaky bucket storage unit. The time when the current accumulated T2P resource amount continues to act, the potential T2P resource obtained from the leaky bucket storage unit is set to be greater than or equal to the minimum value of the T2P resource.  The method according to claim 17, wherein the method for determining the range of values of the minimum and maximum values of T2P is:  In the user configuration mode, the T2P value required for the packet length corresponding to the termination target of the reverse user before the transition point is the left end value of the value range;  The end user of the reverse user corresponds to the T2P value required for the high first packet length of the packet length before the transition point as the right end value of the value range.  The method according to claim 18, wherein the method of setting the potential T2P resource obtained from the leaky bucket storage unit to the minimum value of the T2P resource by the current reverse packet comprises:  The T2P resource that is currently accumulated in the leaky bucket storage unit is set to the left end of the value range, and the T2P resource injected into the leaky bucket storage unit is set to the left end value of the value range, and the T2P resource injected into the leaky bucket storage unit is set. The time that the currently accumulated T2P resource amount of the leaky bucket storage unit continues to act is infinite.  20. A device for implementing a private line user mechanism in a reverse direction in a communication system, wherein the device comprises the following four modules, wherein  Module one, configured to determine a packet length corresponding to a termination target of the reverse dedicated line user;  Module 2, determining a range of values of a minimum value and a maximum value of a power channel T2P of the transmitted traffic channel energy relative to the pilot channel; setting a minimum value and a maximum value of the T2P within the value range; And configured to set an allowable packet length of the currently sent data packet to be greater than or equal to a packet length corresponding to the termination target determined by the reverse private line user, and form a reverse packet according to the allowed packet length; Module 4 is configured to send the reverse packet formed according to the set minimum and maximum values of T2P. A device for implementing a fixed rate in a reverse direction in a communication system, characterized in that the device comprises the following three modules:  Module one, configured to determine a packet length corresponding to the termination target of the reverse user;  Module 2, determining a range of values of the minimum value and the maximum value of the transmitted power channel energy relative to the pilot channel power gain T2P;  Module 3, used to set the growth step and the descending step of the T2P to make the T2P resource injected into the leaky storage unit constant.  22. A device for implementing a fixed rate in a reverse direction in a communication system, the device comprising the following three modules:  Module one, configured to determine a packet length corresponding to the termination target of the reverse user;  Module 2, determining a range of values of the minimum value and the maximum value of the transmitted power channel energy relative to the pilot channel power gain T2P;  Module 3, configured to use a centralized/predetermined resource allocation mode of the base station, send a message to the terminal, specify a T2P resource injected into the leaky bucket storage unit, a T2P resource currently accumulated in the leaky bucket storage unit, and a T2P resource injected into the leaky bucket storage unit. And the time when the T2P resource amount currently accumulated by the leaky bucket storage unit continues to act, and the potential T2P resource obtained by the current reverse packet from the leaky bucket storage unit is set to be greater than or equal to the minimum value of the T2P resource.