CN101141770A - Method and device for dynamically regulating system channel resource - Google Patents
Method and device for dynamically regulating system channel resource Download PDFInfo
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Abstract
The present invention provides a method for dynamically adjusting the system channel resource, and a device. The resource limited acceptance failure rates R<SUB>1 </SUB> and R <SUB> 2 </SUB> of a special channel DCH and a high speed down channel HS-DSCH are respectively accounted, and the R <SUB> 1 </SUB> and R <SUB> 2 </SUB> are respectively compared with the corresponding acceptance failure rate highest thresholds R <SUB> thd1 </SUB> and R <SUB> thd3 </SUB>, and the channel resources are adjusted according to the comparing results. The probability of the limited available resource of the R4 service for accepting failure and the probability of the limited HS-DSCH channel for accepting failure can be accounted through the technical proposal of the present invention, and thus the property relation of the HS-DSCH channel resource and the R4 service channel resource can be dynamically adjusted.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and an apparatus for dynamically adjusting system channel resources.
Background
A High Speed Downlink Packet Access (HSDPA) technology is introduced in 3gpp Release5, and a plurality of terminals share Channel resources of a High Speed Downlink Shared Channel (HS-DSCH) through fast scheduling by a base station (NodeB), and usually, whether to admit an HSDPA service that newly arrives at a certain cell is determined according to usage conditions (including congestion degree, channel occupancy rate, and the like) of the HS-DSCH Channel. In the conventional R4 service, communication is generally performed through a dedicated channel, and admission control determines whether to admit the terminal by determining whether available channel resources reach resources required for carrying the service request. The available channel resources here represent physical channel resources that can be used by the system after sufficiently considering characteristics of interference, load, etc.
In order to ensure the smooth evolution of the system, when a network is constructed, the HSDPA is usually added on the basis of an R4-based network, and a phenomenon that HSDPA and R4 services coexist exists. The reasonable configuration of the ratio of the HS-DSCH Channel resources to the R4 traffic Dedicated Channel (DCH) resources is very important to improve the system capacity and throughput.
For the allocation of the two channel resource ratios, a typical method is to predict the ratio of the two types of services according to the operation experience, so as to estimate the requirement of the two types of services on the channel capacity, thereby allocating a stable resource value, and after a period of operation, the value is reasonably adjusted according to the operation condition, wherein the adjustment period is usually in units of months or years.
However, the above conventional method is adjusted according to an empirical estimation value, and in consideration of the change of the development trend, a large amount of margin is always reserved, and a resource waste phenomenon exists.
In addition, R4 and HSDPA service characteristics are different, and thus, there is a characteristic that the busy and idle degrees of both in one day are different in different periods. This relatively stable resource allocation method cannot adapt to the changing needs of the service characteristics.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a device for dynamically adjusting system channel resources, which can count the probability of admission failure due to limited available resources of R4 service and the probability of admission failure of HS-DSCH channel due to limited resources, thereby dynamically adjusting the proportional relationship between HS-DSCH channel and R4 service channel resources.
The technical scheme for realizing the purpose of the invention is as follows:
a method for dynamically adjusting system channel resource respectively counts the resource limited admission failure rate R of dedicated channel DCH and high speed downlink shared channel HS-DSCH 1 And R 2 And respectively connecting the maximum threshold R with the corresponding maximum threshold R of the receiving failure rate thd1 And R thd2 And comparing and adjusting the resources of the channel according to the comparison result.
Preferably, the resources of the HS-DSCH channel are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 beta.R below threshold thd2 Duration T 2 Then, through HS-DSCH channel reconfiguration, reducing a basic unit of HS-DSCH channel resources;
when R is 2 Exceeds a threshold R thd2 Duration T 2 And R is 1 beta.R below threshold thd1 Duration T 1 Then, through HS-DSCH channel reconfiguration, increasing a basic unit of HS-DSCH channel resource;
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 Exceeds a threshold R thd2 Duration T 2 When, if
Reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel; if it is used
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far greater than 1, and the beta value is less than 1.
Preferably, the resources of the HS-DSCH channel are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 beta.R below threshold thd2 Sustained N 2 Then, reducing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
when R is 2 Exceeds a threshold R thd2 Sustained N 2 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Secondly, increasing a basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 Exceeds a threshold R thd2 Sustained N 2 Then, if
Reducing the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channelA base unit; if it is not
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far greater than 1, and the beta value is less than 1.
Preferably, a sliding window mode is adopted to count the DCH resource limited admission failure rate R 1 And HS-DSCH resource restricted admission failure rate R 2 。
Preferably, a fixed window mode is adopted to count the DCH resource limited admission failure rate R 1 And a HS-DSCH resource limited admission failure rate R 2 。
A method for dynamically adjusting system channel resource, which respectively counts the resource limited admission failure rate R of dedicated channel DCH and downlink shared channel DSCH 1 And R 3 And respectively connecting the maximum admission failure rate and the maximum admission failure rate with corresponding thresholds R thd1 And R thd3 And comparing and adjusting the resources of the channel according to the comparison result.
Preferably, the resources of the DSCH channel are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 beta.R below threshold thd3 Duration T 3 Then, through DSCH channel reconfiguration, reducing one basic unit of DSCH channel resource;
when R is 3 Exceeds a threshold R thd3 Duration T 3 And R is 1 beta.R below threshold thd1 Duration T 1 Then, through DSCH channel reconfiguration, increasing a basic unit of DSCH channel resource;
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 Exceeds a threshold R thd3 Duration T 3 When, if
Reducing the resources of the DSCH channel by a basic unit through the DSCH channel reconfiguration; if it is not
Increasing one basic unit of the resources of the DSCH channel through the DSCH channel reconfiguration;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far greater than 1, and the beta value is less than 1.
Preferably, the resources of the DSCH channel are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 beta.R below threshold thd3 Sustained N 3 Then, through DSCH channel reconfiguration, reducing one basic unit of DSCH channel resource;
when R is 3 Exceeds a threshold R thd3 Sustained N 3 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Then, through DSCH channel reconfiguration, increasing a basic unit of DSCH channel resources;
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 Overflow doorLimit of R thd3 Sustained N 3 Then, ifReducing the resources of the DSCH channel by a basic unit through the DSCH channel reconfiguration; if it is notIncreasing one basic unit of the resources of the DSCH channel through the DSCH channel reconfiguration;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far greater than 1, and the beta value is less than 1.
Preferably, a sliding window mode is adopted to count the DCH resource limited admission failure rate R 1 And DSCH resource limited admission failure rate R 3 。
Preferably, a fixed window mode is adopted to count the DCH resource limited admission failure rate R 1 And DSCH resource limited admission failure rate R 3 。
An apparatus for dynamically adjusting system channel resources, comprising:
a calculating unit for respectively counting resource limited admission failure rate R of dedicated channel DCH and high-speed downlink shared channel HS-DSCH 1 And R 2 ；
A comparison unit for limiting the DCH and HS-DSCH resource to the admission failure rate R 1 And R 2 Respectively corresponding to the highest threshold R of the admission failure rate thd1 And R thd2 Comparing;
and the adjusting unit is used for adjusting the resources of the channel according to the comparison result.
Preferably, the adjusting unit adjusts the resources of the HS-DSCH channel as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 beta.R below threshold thd2 Duration T 2 Reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel;
when R is 2 Exceeds a threshold R thd2 Duration T 2 And R is 1 beta.R below threshold thd1 Duration T 1 Then, through HS-DSCH channel reconfiguration, increasing a basic unit of HS-DSCH channel resource;
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 Exceeds a threshold R thd2 Duration T 2 When it is used, if
Reducing the resources of the HS-DSCH channel through the reconfiguration of the HS-DSCH channelA base unit; if it is not
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far more than 1, and the beta is less than 1.
Preferably, the adjusting unit adjusts the resources of the HS-DSCH channel as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 beta.R below threshold thd2 Sustained N 2 Secondly, reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel;
when R is 2 Exceeds a threshold R thd2 Sustained N 2 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Secondly, increasing a basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 Exceeds a threshold R thd2 Sustained N 2 Then, if
Reducing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; if it is not
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far greater than 1, and the beta value is less than 1.
Preferably, the calculating unit uses a sliding window mode to count the DCH resource restricted admission failure rate R 1 And HS-DSCH resource restricted admission failure rate R 2 。
Preferably, the calculating unit adopts a fixed window mode to count the DCH resource restricted admission failure rate R 1 And a HS-DSCH resource limited admission failure rate R 2 。
An apparatus for dynamically adjusting system channel resources, comprising:
a calculating unit for respectively counting resource limited admission failure rate R of dedicated channel DCH and downlink shared channel DSCH 1 And R 3 ；
A comparing unit for limiting the DCH and DSCH resource to the admission failure rate R 1 And R 3 Respectively corresponding to the highest threshold R of the admission failure rate thd1 And R thd3 Comparing;
and the adjusting unit is used for adjusting the resources of the channel according to the comparison result.
Preferably, the adjusting unit adjusts the resources of the DSCH channel as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 beta.R below threshold thd3 Duration T 3 Then, through DSCH channel reconfiguration, reducing one basic unit of DSCH channel resource;
when R is 3 Exceeds a threshold R thd3 Duration T 3 And R is 1 beta.R below threshold thd1 Duration T 1 Then, increasing a basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel;
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 Exceeds a threshold R thd3 Duration T 3 When it is used, if
Reducing the resources of the DSCH channel by a basic unit through the DSCH channel reconfiguration; if it is not
Increasing one basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far greater than 1, and the beta value is less than 1.
Preferably, the adjusting unit adjusts the resources of the DSCH channel as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 beta.R below threshold thd3 Sustained N 3 Then, through DSCH channel reconfiguration, reducing one basic unit of DSCH channel resource;
when R is 3 Exceeds a threshold R thd3 Sustained N 3 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Then, through DSCH channel reconfiguration, increasing a basic unit of DSCH channel resources;
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 Exceeds a threshold R thd3 Sustained N 3 Then, if
Reducing the resources of the DSCH channel by a basic unit through the DSCH channel reconfiguration; if it is used
Increasing one basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel;
wherein alpha and beta are coefficients and alpha is greater than 1.
The alpha is far greater than 1, and the beta value is less than 1.
Preferably, theThe calculating unit adopts a sliding window mode to count the DCH resource limited admission failure rate R 1 And DSCH resource limited admission failure rate R 3 。
Preferably, the calculating unit adopts a fixed window mode to count the DCH resource restricted admission failure rate R 1 And DSCH resource limited admission failure rate R 3 。
The invention can be realized in RNC, which can adjust for one cell, or adjust for several cells with similar service characteristics, or adjust for NodeB managed by RNC. Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
the invention counts the probability of the acceptance failure caused by the limited available resource of the R4 service and the probability of the acceptance failure caused by the limited resource of the HS-DSCH channel, and dynamically adjusts the proportion of the HS-DSCH channel and the R4 service channel according to the two probabilities. The invention can dynamically adjust the HS-DSCH channel resources according to the statistical conditions of R4 service and HSDPA service in the system, thereby maximizing the throughput capacity of the system.
In addition, the invention is not limited to HS-DSCH channel resource adjustment, and can also be used for general DSCH channel resource adjustment.
The invention is further described with reference to the following figures and detailed description.
Drawings
Fig. 1 is a schematic diagram of a physical shared channel reconfiguration process;
FIG. 2 is a schematic diagram of a frame structure of a TD-SCDMA system;
FIG. 3 is a flow chart of the method of the present invention;
FIG. 4 is a block diagram of an apparatus according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an application of the embodiment of the present invention.
Detailed Description
The invention provides a method for counting the probability of admission failure caused by the limited available resources of R4 service and the probability of admission failure caused by the limited resources of HS-DSCH channel, and dynamically adjusting the proportion of the HS-DSCH channel and the R4 service channel according to the two probabilities. The method is implemented in a Radio Network Controller (RNC), which is generally an adjustment for one cell, and may also be a synchronous adjustment for multiple cells with similar service characteristics, or a synchronous adjustment for a NodeB managed by the whole RNC.
In the network planning stage, the ratio of the HSDPA service and the R4 service is generally estimated according to the operation experience, and a corresponding number of HS-DSCH channels and DPCH channels are configured accordingly. According to the 3GPP protocol, the allocation and modification of HSDPA initial resources of a cell is done by a physical shared channel reconfiguration procedure, as shown in fig. 1.
After the cell resource configuration is successful, corresponding admission control can be performed according to the resource and service bearing characteristic request of the terminal. If the occurrence ratio of the HSDPA service and the R4 service is not consistent with the ratio of the network planning stage, the method of the invention is needed to be used for adjusting the channel resources.
The method for dynamically adjusting system channel resources of the present invention, as shown in fig. 3, includes the following processes:
The following will be described separately for the above three steps:
first, the limited admission failure rate (using the symbol R) of the available resources for R4 service is given 1 To represent) Definition and statistical method of (1).
The R4 service performs admission control in a Radio Resource Management (RRM) module of the RNC. There may be several reasons for the admission failure, the most important reason is that the available resources of the system are limited, that is, the available physical channel resources are not enough to carry the currently requested service in consideration of system interference and load. So R 1 Is defined as: a ratio of a number of times admission is denied to a total number of admission requests over a period of time due to limited available resources. The following formula 1:
During the counting, a statistical method of a sliding window can be adopted, and the smoothing processing is carried out through a forgetting factor. The process is exemplified as follows:
setting the window length as W (W size design needs to combine with the required value of the system to the failure rate and reach a certain confidence level, for example, if the requirement to the failure rate is 1%, the sliding window can be better larger than 100), the sliding step S and the forgetting factor p. The step of updating the admission failure rate is as follows:
initialization of R 1 (0) =0; (formula 2)
After the k & S time admission request is finished
if k·S＜W
else
R current ＝n/W
Where n is the number of times admission is denied within the window due to the limited available resources.
R 1 (k)＝(1-p)·R 1 (k-1)+p·R current (formula 4)
Wherein the forgetting factor p is less than or equal to 1.
When the window length W = S of the sliding window, the method degenerates to a fixed window; when the forgetting factor p =1, the method degenerates to non-smooth filtering.
The method of sliding window and forgetting factor is a preferred embodiment of the present invention, and other statistical methods such as fixed window can be considered in practical application by applying the idea of the present invention.
Then, the HSDPA traffic channel resource limited admission failure rate (by symbol R) is given 2 ) Definition and statistical method of (1).
The admission of the HSDPA service may be performed in an RRM part of the RNC, and it may be determined whether to continue to admit the terminal according to a Buffer occupation situation or a delay situation of a MAC entity (MAC-d) packet of a dedicated channel processed by the current HSDPA terminal, and if the terminal is rejected, it may be understood that the admission is failed due to limited channel resources. In addition, in HSDPA, the NodeB side adds a high speed downlink packet access media access control (MAC-hs) for HSDPA, and this layer may reject establishment or reconfiguration of a radio link sent by the RNC according to the resource occupation and transmission capability conditions counted by the NodeB, and feed back the reject reason, and the RNC may read the reject reason, and if the reason is a channel resource, register the resource restricted admission failure.
So R 2 Is defined as: the ratio of the number of times an HSDPA terminal rejects an admission to the total number of admission requests for a period of time due to limited available resources. The statistical method of the parameter is similar to that of the R4 service.
And finally, providing a strategy for dynamically adjusting the HS-DSCH channel resources.
Assuming that the required value of the admission failure rate of the R4 service by the network design is lower than the threshold R thd1 The admission failure rate requirement of HSDPA service is lower than the threshold R thd2 The resource adjustment may adopt the following triggering modes:
when (R) 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 beta.R below threshold thd2 Duration T 2 ) When the temperature of the water is higher than the set temperature,reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel; ( In a Time Division Duplex (TDD) system, a basic unit may be 1 slot; in a Frequency Division Duplex (FDD) system, a base unit may be a code channel with a spreading factor of SF = 16. )
When (R) 2 Exceeds a threshold R thd2 Duration T 2 And R is 1 beta.R below threshold thd1 Duration T 1 ) Then, through HS-DSCH channel reconfiguration, increasing a basic unit of HS-DSCH channel resource;
when (R) 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 Exceeds a threshold R thd2 Duration T 2 ) When the utility model is used, the water is discharged,
1) Warning that the system is busy;
2) If it is not
Reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel;
3) If it is not
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
to avoid frequent adjustment, α should be much larger than 1, for example, α may be 10; the value of beta should be less than 1 and the value of beta should be greater than 0.
In addition, the trigger condition may be modified based on the number of admissions: sustained N 1 Secondary admission, R 1 Exceeds a threshold R thd1 Continued for N 2 Secondary admission, R 2 Exceeds a threshold R thd2 。
To avoid frequent channel adjustments, T 1 ，N 1 Should be relatively large, typically T 1 May be in units of 1000 seconds, N 1 May be in units of 1000 times.
In addition, when allocating more resources for HS-DSCH channels, R4 traffic on the channel where resources are newly allocated needs to be adjusted to available resources first.
The method of the invention is not limited to HS-DSCH Channel resource adjustment, and can also be used for adjusting the resource of a general Downlink Shared Channel (DSCH). The statistical process and the adjusting method are basically the same as the HS-DSCH, and are explained as follows:
DSCH traffic channel resource limited admission failure rate (with symbol R) 3 ) Definition and statistical method of (1).
The admission of the DSCH service can be carried out in an RRM part of an RNC, whether the terminal is admitted continuously can be determined according to the Buffer occupation condition or the time delay condition of the MAC-D data packet of the current DSCH terminal, and if the terminal is refused, the admission can be understood as that the admission is failed due to the limited channel resources.
So R 3 Is defined as follows: the DSCH terminal rejects the ratio of the number of admissions to the total number of admissions requests for a period of time due to limited available resources. The statistical method of the parameter is similar to that of the R4 service.
The adjustment strategy is the same as the aforementioned HS-DSCH channel adjustment strategy, and is described as follows:
assuming that the required value of the admission failure rate of the R4 service by the network design is lower than the threshold R thd1 The admission failure rate requirement of DSCH service is lower than a threshold R thd3 The resource adjustment may adopt the following triggering modes:
when (R) 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 beta.R below threshold thd3 Duration T 1 ) Then, through DSCH channel reconfiguration, reducing one basic unit of DSCH channel resource;
when (R) 3 Exceeds a threshold R thd3 Duration T 3 And R is 1 beta.R below threshold thd1 Duration T 3 ) Then, through DSCH channel reconfiguration, increasing a basic unit of DSCH channel resource;
when (R) 1 Exceed the thresholdR thd1 Duration T 1 And R is 3 Exceeds a threshold R thd3 Duration T 3 ) When the temperature of the water is higher than the set temperature,
1) Warning that the system is busy;
2) If it is not
Reducing the resources of the DSCH channel by one basic unit through the reconfiguration of the DSCH channel;
3) If it is not
Increasing a basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel;
to avoid frequent adjustment, α should be much larger than 1, for example, α may be 10; the value of beta should be less than 1 and greater than 0.
In addition, the trigger condition may be modified based on the number of admissions: sustained N 1 Secondary admission, R 1 Exceeds the threshold R thd1 Continued for N 3 Secondary admission, R 3 Exceeds a threshold R thd3 。
To avoid frequent channel adjustments, T 1 ，N 1 Should be relatively large, e.g. T 1 May be in units of 1000 seconds, N 1 May be in units of 1000 times.
An embodiment corresponding to a single carrier TD-SCDMA system is given below, the TD-SCDMA system employs time division duplex, and its frame structure is shown in fig. 2:
in the TD-SCDMA system, one radio frame is 10ms long and is divided into two 5ms subframes. The structure of these two subframes is identical. Each subframe includes 7 normal slots (TS 0 to 6) and 3 special slots (DwPTS, GP, and UpPTS). Wherein: a Time Slot0 (TS 0, time Slot 0) and a Downlink Pilot Channel (DwPCH, downlink Pilot Channel) are fixed as Downlink Time slots; an Uplink Pilot Channel (UpPCH) and a TS1 are fixed as an Uplink timeslot; TS2 to TS6 may be configured as uplink timeslots or downlink timeslots, and the uplink and downlink timeslots are separated by a Switch Point (Switch Point). There are only two switching points in a subframe, the first switching Point (Switch Point 1) is fixedly located between DwPCH and UpPCH, and the second switching Point (Switch Point 2) may be located at the end of any one of TS1 to TS 6.
The resource adjustment process is specifically as follows:
s1: when the network is established, time slot and code channel resources occupied by an uplink and downlink time slot conversion point and a downlink HS-DSCH channel are planned, and in order to avoid interference of an HSDPA terminal and an R4 terminal, the HS-DSCH channel occupies the whole time slot under normal conditions. Assuming that the configuration of two, up and four and down is adopted, the HS-DSCH channel occupies three time slots;
in actual planning, three grouping strategies can be adopted:
(1) Dividing the cells with similar service characteristics into a group, and setting the same resource allocation proportion;
(2) Each cell is a group, and resource allocation is defined independently;
(3) The cells managed by the whole RNC are in one group and have the same resource allocation ratio.
S2: and after each service arrives, judging whether the service is the R4 service or the HSDPA service according to the admission result. If the service is the R4 service, S3; if it is HSDPA business, S4; according to the three grouping strategy of S1, S3 and S4 are carried out by taking a group as a unit.
S3: reference is made to R above 1 Calculating R 1 ；
S4: reference is made to R above 2 Calculating R 2 ；
S5: with reference to the above strategy for dynamically adjusting the HS-DSCH channel resources, it is determined whether the condition for resource adjustment is satisfied, and the corresponding adjustment strategy and action, in units of groups. If no action is needed, returning to S2 to wait for a new service to arrive; if adjustment is required, then
S6: judging whether new resources need to be allocated for the HS-DSCH channel according to the adjustment strategy of S5, and if so, adjusting the R4 service which is using the resources to be allocated to the HS-DSCH channel to other resources;
s7: an HS-DSCH channel reconfiguration procedure is performed.
Correspondingly, an apparatus for implementing the above method steps is shown in fig. 4, and includes:
a calculating unit 41, configured to count resource restricted admission failure rates R of dedicated channel DCH and high-speed downlink shared channel HS-DSCH respectively 1 And R 2 ；
A comparing unit 42 for limiting the DCH and HS-DSCH resource to the admission failure rate R 1 And R 2 Respectively corresponding maximum threshold R of admission failure rate thd1 And R thd2 Comparing;
an adjusting unit 43, configured to adjust the resource of the HS-DSCH channel according to the comparison result, specifically:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 beta.R below threshold thd2 Duration T 2 Reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel;
when R is 2 Exceeds a threshold R thd2 Duration T 2 And R is 1 beta.R below threshold thd1 Duration T 1 Then, through HS-DSCH channel reconfiguration, increasing a basic unit of HS-DSCH channel resource;
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 Exceeds a threshold R thd2 Duration T 2 When it is used, if
Reducing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; if it is used
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel;
wherein alpha and beta are coefficients, the value of alpha is far larger than 1, if alpha can be 10, beta is smallAt 1, greater than 0; t is a unit of 1 And T 2 In units of 1000 seconds.
The calculating unit 41 adopts a sliding window or fixed window mode to count the failure rate R of the DCH resource restricted admission 1 And HS-DSCH resource restricted admission failure rate R 2 For the specific statistical process, the foregoing contents are referred to, and are not repeated herein.
In addition, the apparatus can be applied to the Call access Control CAC (Call Admission Control) part of the RRM module in the existing RNC device in the 3G network, as shown in fig. 5.
When the network is established, the time slot and code channel resources occupied by the uplink and downlink time slot conversion point and the downlink HS-DSCH channel are planned, in order to avoid the interference of HSDPA terminal and R4 terminal, under normal condition, HS-DSCHThe channel occupies the entire time slot. After each service arrival, judging whether the service is an R4 service or an HSDPA service according to an admission result, and calculating R 1 And R 2 (ii) a Then according to the strategy for dynamically adjusting the HS-DSCH channel resources, corresponding adjustment strategy and action are carried out.
The above-described embodiments of the present invention do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (40)
1. A method for dynamically adjusting system channel resources is characterized in that the resource limited admission failure rate R of a dedicated channel DCH and a high-speed downlink shared channel HS-DSCH is respectively counted 1 And R 2 And respectively corresponding to the highest threshold R of the corresponding admission failure rate thd1 And R thd2 And comparing and adjusting the resources of the channel according to the comparison result.
2. The method of claim 1, wherein the resources of the HS-DSCH channels are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 beta.R below threshold thd2 Duration T 2 Then, through HS-DSCH channel reconfiguration, reducing a basic unit of HS-DSCH channel resources; where β is a coefficient.
3. The method of claim 1, wherein the resources of the HS-DSCH channels are adjusted as follows:
when R is 2 Exceeds a threshold R thd2 Duration T 2 And R is 1 beta.R below threshold thd1 Duration T 1 Then, through HS-DSCH channel reconfiguration, increasing a basic unit of HS-DSCH channel resource; where β is a coefficient.
4. A method according to claim 2 or 3, wherein the β value is less than 1.
5. The method of claim 1, wherein the resources of the HS-DSCH channels are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 Exceeds a threshold R thd2 Duration T 2 When, if
Reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel; if it is used
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; where α is a coefficient greater than 1.
6. The method of claim 5, wherein the α value is substantially greater than 1.
7. The method of claim 1, wherein the resources of the HS-DSCH channels are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 beta.R below threshold thd2 Sustained N 2 Then, reducing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; wherein beta isAnd (4) the coefficient.
8. The method of claim 1, wherein resources of the HS-DSCH channels are adjusted as follows:
when R is 2 Exceeds a threshold R thd2 Sustained N 2 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Secondly, increasing a basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; where β is a coefficient.
9. The method of claim 7 or 8, wherein the β value is less than 1.
10. The method of claim 1, wherein resources of the HS-DSCH channels are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 Exceeds a threshold R thd2 Sustained N 2 Then, if
Reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel; if it is not
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; where α is a coefficient greater than 1.
11. The method of claim 10, wherein the α value is substantially greater than 1.
12. The method of claim 1, wherein the DCH resource restricted admission failure rate R is counted in a sliding window manner 1 And HS-DSCH resource restricted admission failure rate R 2 。
13. The method of claim 1, wherein the DCH resource restricted admission failure rate R is counted in a fixed window manner 1 And HS-DSCH resource restricted admission failure rate R 2 。
14. A method for dynamically adjusting system channel resource is characterized in that the resource limited admission failure rate R of dedicated channel DCH and downlink shared channel DSCH is respectively counted 1 And R 3 And respectively connecting the maximum admission failure rate with the corresponding maximum admission failure rate threshold R thd1 And R thd3 And comparing and adjusting the resources of the channel according to the comparison result.
15. The method of claim 14, wherein the resources of the DSCH channel are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 beta.R below threshold thd3 Duration T 3 While, get throughReducing the resource of DSCH channel by one basic unit after the reconfiguration of DSCH channel;
when R is 3 Exceeds a threshold R thd3 Duration T 3 And R is 1 beta.R below threshold thd1 Duration T 1 Then, through DSCH channel reconfiguration, increasing a basic unit of DSCH channel resource;
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 Exceeds a threshold R thd3 Duration T 3 When, if
Reducing the resources of the DSCH channel by a basic unit through the DSCH channel reconfiguration; if it is not
Increasing one basic unit of the resources of the DSCH channel through the DSCH channel reconfiguration; α and β are coefficients, where α is greater than 1.
16. The method of claim 15 wherein said α value is substantially greater than 1 and said β value is less than 1.
17. The method of claim 14, wherein the resources of the DSCH channel are adjusted as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 beta.R below threshold thd3 Sustained N 3 Then, through DSCH channel reconfiguration, reducing one basic unit of DSCH channel resource;
when R is 3 Exceeds a threshold R thd3 Sustained N 3 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Secondly, increasing a basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel;
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 Exceeds a threshold R thd3 Sustained N 3 Then, if
Reducing the resources of the DSCH channel by a basic unit through the DSCH channel reconfiguration; if it is not
Increasing one basic unit of the resources of the DSCH channel through the DSCH channel reconfiguration; α and β are coefficients, where α is greater than 1.
18. The method of claim 17 wherein said α value is substantially greater than 1 and said β value is less than 1.
19. The method of claim 14, wherein the DCH resource restricted admission failure rate R is counted in a sliding window manner 1 And DSCH resource-limited admission failure rate R 3 。
20. The method of claim 14, wherein the DCH resource restricted admission failure rate R is counted in a fixed window manner 1 And DSCH resource limited admission failure rate R 3 。
21. An apparatus for dynamically adjusting system channel resources, comprising:
a calculating unit for respectively counting resource limited admission failure rates R of dedicated channel DCH and high-speed downlink shared channel HS-DSCH 1 And R 2 ；
A comparison unit for limiting the DCH and HS-DSCH resource to the admission failure rate R 1 And R 2 Respectively corresponding to the highest threshold R of the admission failure rate thd1 And R thd2 Comparing;
and the adjusting unit is used for adjusting the resources of the channel according to the comparison result.
22. The apparatus of claim 21, wherein the adjusting unit adjusts the resources of the HS-DSCH channels in a manner as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 beta.R below threshold thd2 Duration T 2 Then, through HS-DSCH channel reconfiguration, reducing a basic unit of HS-DSCH channel resources; where β is a coefficient.
23. The apparatus of claim 21, wherein the adjusting unit adjusts the resources of the HS-DSCH channel in the following manner:
when R is 2 Exceeds a threshold R thd2 Duration T 2 And R is 1 beta.R below threshold thd1 Duration T 1 Then, through HS-DSCH channel reconfiguration, increasing a basic unit of HS-DSCH channel resource; where β is a coefficient.
24. The apparatus of claim 22 or 23, wherein the β value is less than 1.
25. The apparatus of claim 21, wherein the adjusting unit adjusts the resources of the HS-DSCH channels in a manner as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 2 Exceeds a threshold R thd2 Duration T 2 When, if
Reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel; if it is not
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; where α is a coefficient greater than 1.
26. The apparatus of claim 25, wherein the α value is substantially greater than 1.
27. The apparatus of claim 21, wherein the adjusting unit adjusts the resources of the HS-DSCH channel in the following manner:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 beta.R below threshold thd2 Sustained N 2 Secondly, reducing the resource of the HS-DSCH channel by one basic unit through the reconfiguration of the HS-DSCH channel; where β is a coefficient.
28. The apparatus of claim 21, wherein the adjusting unit adjusts the resources of the HS-DSCH channel in the following manner:
when R is 2 Exceeds a threshold R thd2 Sustained N 2 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Secondly, increasing a basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; where β is a coefficient.
29. The apparatus of claim 27 or 28, wherein the β value is less than 1.
30. The apparatus of claim 21, wherein the adjusting unit adjusts the resources of the HS-DSCH channels in a manner as follows:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 2 Exceeds a threshold R thd2 Sustained N 2 Then, if
Reducing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; if it is used
Increasing one basic unit of the resource of the HS-DSCH channel through the reconfiguration of the HS-DSCH channel; where α is a coefficient greater than 1.
31. The apparatus of claim 30 wherein said α value is substantially greater than 1.
32. The apparatus of claim 21, wherein the computing unit counts DCH resource restricted admission failure rate R in a sliding window manner 1 And HS-DSCH resource restricted admission failure rate R 2 。
33. The apparatus of claim 21, wherein the computing unit is to computeFixed window mode is adopted to count DCH resource limited admission failure rate R 1 And a HS-DSCH resource limited admission failure rate R 2 。
34. An apparatus for dynamically adjusting system channel resources, comprising:
a calculating unit for respectively counting resource limitation of dedicated channel DCH and downlink shared channel DSCHAdmission failure rate R 1 And R 3 ；
A comparing unit for limiting the DCH and DSCH resource to the admission failure rate R 1 And R 3 Respectively corresponding to the highest threshold R of the admission failure rate thd1 And R thd3 Comparing;
and the adjusting unit is used for adjusting the resources of the channel according to the comparison result.
35. The apparatus of claim 34, wherein the adjusting unit adjusts the resources of the DSCH channel in a manner as follows:
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 beta.R below threshold thd3 Duration T 3 Then, through DSCH channel reconfiguration, reducing a basic unit of DSCH channel resources;
when R is 3 Exceeds a threshold R thd3 Duration T 3 And R is 1 beta.R below threshold thd1 Duration T 1 Then, increasing a basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel;
when R is 1 Exceeds a threshold R thd1 Duration T 1 And R is 3 Exceeds a threshold R thd3 Duration T 3 When, if
Reducing the resources of the DSCH channel by a basic unit through the DSCH channel reconfiguration; if it is notIncreasing one basic unit of the resources of the DSCH channel through the DSCH channel reconfiguration; α and β are coefficients, where α is greater than 1.
36. The apparatus of claim 35 wherein said α value is substantially greater than 1 and said β value is less than 1.
37. The apparatus of claim 34, wherein the adjusting unit adjusts the resources of the DSCH channel in the following manner:
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 beta.R below threshold thd3 Sustained N 3 Then, through DSCH channel reconfiguration, reducing one basic unit of DSCH channel resource;
when R is 3 Exceeds a threshold R thd3 Sustained N 3 Sub and R 1 beta.R below threshold thd1 Sustained N 1 Secondly, increasing a basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel;
when R is 1 Exceeds a threshold R thd1 Sustained N 1 Sub and R 3 Exceeds a threshold R thd3 Sustained N 3 Then, if
Reducing the resources of the DSCH channel by one base through the DSCH channel reconfigurationA unit; if it is not
Increasing one basic unit of the resources of the DSCH channel through the reconfiguration of the DSCH channel; α and β are coefficients, where α is greater than 1.
38. The apparatus of claim 37, wherein the α value is substantially greater than 1 and the β value is less than 1.
39. The apparatus of claim 34, wherein the apparatus is a portable electronic deviceThen, the calculating unit adopts a sliding window mode to count the DCH resource limited admission failure rate R 1 And DSCH resource-limited admission failure rate R 3 。
40. The apparatus of claim 34, wherein the calculating unit counts the DCH resource restricted admission failure rate R with a fixed window approach 1 And DSCH resource-limited admission failure rate R 3 。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101621828B (en) * | 2008-07-03 | 2012-01-25 | 电信科学技术研究院 | Method and system for controlling admission for user in high-speed downlink packet access |
| CN102364985A (en) * | 2011-11-01 | 2012-02-29 | 邦讯技术股份有限公司 | Method for dynamically configuring femtocell high speed downlink packet access (HSDPA) service time slot and apparatus thereof |
| CN101466080B (en) * | 2009-01-08 | 2012-04-04 | 中兴通讯股份有限公司 | Method and apparatus for distributing channel resource |
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| CN101621828B (en) * | 2008-07-03 | 2012-01-25 | 电信科学技术研究院 | Method and system for controlling admission for user in high-speed downlink packet access |
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| CN105611593B (en) * | 2016-01-06 | 2018-05-29 | 广东欧珀移动通信有限公司 | A kind of channel switching method, mobile terminal, server and mobile communication system |
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