WO2008110074A1

WO2008110074A1 - A method and device for relieving congestion of credit resources

Info

Publication number: WO2008110074A1
Application number: PCT/CN2008/000496
Authority: WO
Inventors: Xueliang Wang
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2007-03-14
Filing date: 2008-03-13
Publication date: 2008-09-18
Also published as: CN101022673B; CN101022673A

Abstract

A method and device for relieving congestion of credit resources which actualize relieving the congestion status of the credit resources are provided. The present invention method includes: judging the congestion of the credit resources; when judging the credit resources are in congestion, selecting a load reshuffling LDR action, and selecting RABs or users according to the selected LDR action; and performing the selected LDR action for the credit resources occupied currently by the selected RABs or users, so as to relieve the congestion of the credit resources. The present invention device for relieving the congestion of the credit resources includes: a congestion judging module, a LDR action selecting mudule, a RAB selecting module and a LDR action performing module.

Description

The invention relates to a Chinese patent application for resolving credit resource congestion on March 14, 2007, and the Chinese Patent Application No. 200710086835.3, entitled "A Method and Apparatus for Relieving Credit Resource Congestion" Priority is hereby incorporated by reference in its entirety.

Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for relieving congestion of credit resources. Background technique

Differentiated services have become a common demand of today's mainstream operators, and there are currently many technologies for differentiated services. In terms of congestion control, there are: Uu port power primary congestion control, Uu port power overload congestion control, equivalent user number primary congestion control, Iub port bandwidth primary congestion control, and code resource primary congestion control. The so-called primary congestion control is also called load reshuffling (LDR). The algorithm refers to the adjustment of the resources of existing users in the cell in order to enable subsequent users to use the cell resources smoothly after the load reaches a certain threshold. The process of redistribution. The trigger sources of primary congestion can be classified into two types, one is hard resources, including Iub bandwidth resources, code resources, and credit resources; the other is soft resources, including Uu port power resources and equivalent user resources.

The inventor found in the process of the invention that the prior art does not have a solution for resolving credit resource congestion. Summary of the invention

Embodiments of the present invention provide a method and apparatus for relieving congestion of a credit resource, thereby realizing cancellation of a credit resource congestion condition.

The method of the embodiment of the present invention includes the following steps: performing a congestion decision on a credit resource; when determining that the credit resource is congested, selecting a load reforming LDR action, and selecting according to the selected LDR action Take the RAB or the user; and perform the selected LDR action on the selected RAB or the credit resource currently occupied by the user to relieve the congestion of the credit resource.

The device for resolving credit resource congestion in the embodiment of the present invention includes: a congestion determination module, configured to perform congestion determination on a credit resource; and an LDR action selection module, configured to select a load reforming LDR action when the congestion determination module determines that the credit resource is congested The RAB selection module is configured to select the RAB or the user according to the LDR action selected by the LDR action selection module; the LDR action execution module is configured to perform the LDR on the selected RAB of the RAB selection or the credit resource currently occupied by the user. The LDR action selected by the action selection module.

The embodiment of the invention first performs a congestion decision on the credit resource. When it is determined that the credit resource is congested, the load reorganization LDR action is selected, and the RAB or the user is selected according to the selected LDR action. The selected LDR action is then performed on the selected RAB or the credit resource currently occupied by the user. Therefore, the embodiment of the present invention can relieve the congestion of credit resources. DRAWINGS

1 is a flow chart of steps of a method according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a device according to an embodiment of the present invention. detailed description

In order to achieve the cancellation of the credit resource congestion, the credit resource of the reserved threshold is used for the access of the subsequent user. The embodiment of the present invention provides a method for resolving the credit resource congestion. Referring to FIG. 1 , the following The main steps:

Sl. Congestion judgment on credit resources.

Judging the congestion of credit resources is divided into three levels, two directions. The three levels are NodeB (base station), local cell group, and local cell, and the two directions are uplink and downlink. That is, the six kinds of judgments are: NodeB uplink credit resource congestion, NodeB downlink credit resource congestion, local cell group uplink credit resource congestion, local cell group downlink credit resource congestion, local cell uplink credit resource congestion, and local cell downlink credit resources congestion. The above judgments can be single There are no dependencies and mutually exclusive relationships between them. When the simultaneous judgments of the two judgment cases in the same direction are inconsistent, the credit resource is determined to be congested, and the subsequent steps are performed.

In a specific implementation, three RNC (Radio Network Controller) level switches can be configured, which are a NodeB credit resource congestion control switch, a local cell group credit resource congestion control switch, and a local cell credit resource congestion control switch. Only when the credit resource congestion control switch is turned on, the judgment of the corresponding level of credit resource congestion is performed. The purpose of setting this switch is to flexibly control the RNC's choice of three levels of credit resource congestion control, because the level of credit resources reported by the NodeB may not match the actual situation, or the operator may not select this function.

Since the credit resources may be independent allocation of uplink and downlink, it may also be uplink and downlink sharing. Therefore, for the distribution of these two credit resources, the above six judgments have their own judgment formulas.

For the downlink, the credit resources of HSDPA (High Speed Downlink Packet Access) are reserved, so the decision formula does not involve the credit resources of HSDPA. For the uplink, after the introduction of HSUPA (High Speed Uplink Packet Access), the E-DCH is Consumption rules, so its resources participate in judgments and user choices.

The relevant judgment formulas for the independent allocation of credit resources (ie, the uplink credit resources and the downlink credit resources are separated) are as follows:

When the uplink and downlink channels independently allocate credit resources, the congestion decision formula for the uplink credit resources of the NodeB is ( _UL Consume, NodeB Ui Thr > ^UL Capacity Credit, NodeB - 0/ Used Credit, NodeB.

When the uplink and downlink channels independently allocate credit resources, the congestion judgment formula for the uplink credit resources for the local cell group is

t L Consume, local cell group Wl Thr ^UL Capacity Credit Jocal cell group ^UL Used Credit Jo al cell group °

When the uplink and downlink channels independently allocate credit resources, the congestion judgment formula for the uplink credit resources of the local cell is Consume Jocal cell )t / / Thr > ^ UL Capacity Credit Jocal cell ~ " ^ UL Used Credit Jocal cell.

When the uplink and downlink channels independently allocate credit resources, the congestion decision formula for the downlink credit resources of the NodeB is ( _DL Consume _t NodeB Dl Thr > ^DL Capacity Credit, NodeB " ^ DL Used Credit, NodeB.

When the uplink and downlink channels independently allocate credit resources, perform downlink credits for the local cell group. The source congestion decision formula is

Used Credit Jocal cell group.

When the uplink and downlink channels independently allocate credit resources, the congestion judgment formula for the downlink credit resources of the local cell is (C _Di Consume Jocal cell Thr > C. L Capacity Credit Jocal cell ~ ^DL Used Credit, local cell ° uplink and downlink shared credit resources (The relevant judgment formulas for the uplink credit resources and the downlink credit resources are not separated) are as follows:

When the uplink and downlink channels share the credit resources, the congestion judgment formula for the uplink credit resources of the NodeB is (C _+D Consume, NodeB Thr > ^Capacity Credit NodeB ~~ ^Used Credit, NodeB.

When the uplink and downlink channels share the credit resources, the congestion judgment formula for the uplink credit resources for the local cell group is

Credit Jocal cell group - C Used Credit, local cell group °

When the uplink and downlink channels share the credit resources, the congestion decision formula for the uplink credit resources of the local cell is (C _{U +Di} Consumejocal ceil )ΐ7/ Thr > ^Capacity Credit Jocal cell ― ^Used Credit Jocal cell.

When the uplink and downlink channels share the credit resources, the congestion judgment formula for the downlink credit resources for the NodeB is (C^+ Consume NodeB Thr > C capacity Credit NodeB ~ ^Used Credit, NodeB °

When the uplink and downlink channels share the credit resources, the congestion judgment formula for the downlink credit resources for the local cell group is

Credit Jocal ceil group.

When the uplink and downlink channels share the credit resources, the congestion judgment formula for the downlink credit resources of the local cell is ( _+D Consumejocal cell) Dl Thr > ^Capacity Credit Jocal cell_^Used Credit Jocal cell °

In each of the above formulas, c.^^ ^,,. represents the total credit resource, cw represents the used credit resource, ( ^c * ^c ~ ^ represents the reserved credit that can be judged according to the credit resource reservation threshold and the consumption rule. The total credit resource and consumption rule are NodeB ^^; the used credit resources are maintained by the RNC; the credit resource reservation threshold is configured, and the credit resource reservation threshold is spread. Factor, for example: want to reserve 64K BE service (do your best) For the business, or the best-effort type of service, the peer-to-peer credit resource is configured with the reserved threshold as the spreading factor.

32. The consumption rule between the reserved spreading factor and the reserved credit resource takes the consumption rule of the first-level dedicated channel first link.

52. When it is determined that the credit resource is congested, the LDR action is selected.

Regardless of whether the decision is the congestion of the credit resources of the NodeB, the congestion of the credit resources of the local cell group, or the congestion of the credit resources of the local cell, the alternative LDR actions include: Uplink/downlink BE service slowdown, CS (circuit switched) different system handover , PS (Packet Switching), different system switching, uplink/downlink uncontrollable real-time service Qos (service shield) renegotiation. However, the inter-frequency handover operation is not considered, because the user avoids the ping-pong that the user switches in the inter-frequency neighbor interval because the credit resource is congested.

There is a priority between the above-mentioned alternative LDR actions, which are BE service deceleration, CS different system handover, PS different system handover, and uncontrollable real-time service Qos re-negotiation in descending order of priority.

53. Select a user or RAB according to the selected LDR action.

There are different ways of selecting users or RABs for each of the alternative LDR actions described in step S2. If the user or the RAB is not selected according to the currently selected LDR action, the next LDR action is selected according to the priority of the candidate LDR actions described in step S2, and the user or the corresponding user is selected. RAB, until the selected user or RAB.

If the currently selected LDR action is a BE service slowdown, the RAB is selected as follows:

For all RABs that have a penalty status of "BE service deceleration" in the corresponding direction in the cell (that is, the RAB that has not been selected by the BE service deceleration action), according to its PK value (ie, the priority of the RAB, the smaller the PK value) The higher the priority is, the sorting is performed. When the PK values are the same, the number of times the LDR is selected by the user is from small to large. In the sorted RAB list, N RABs are selected from the front to the back, and the N is less than or equal to once. The BE service slows down the maximum RAB number M.

In addition, the user to which the selected RAB belongs must be a steady-state user and not a DRNC/emergency/CMB/robbed user; the selected RAB is not HSUPA/HSDPARAB, not gold/WPS RAB (gold medal) RAB refers to high priority RAB, users with gold RAB are gold users; WPS RAB refers to high priority RAB, and users with WPS RAB are used for WPS The current rate is greater than the guaranteed rate, and the service type is the PS domain interaction and background service.

If the currently selected LDR action is a CS-specific system switch, the user is selected according to the following content: all users who have a penalty state of the CS-specific system handover in the cell (ie, a user that has not been selected by the CS different system switching action), according to The PK values are sorted. When the PK values are the same, the number of times the LDRs are selected by the user is from small to large; in the ranked user list, N users are selected from front to back; the N is less than or equal to one CS difference. The system switches the maximum number of users ^1.

In addition, the user who is required to be selected must be a steady-state user, and is not a DRNC/emergency/CMB/robbed user, not a gold-plated PS user. The business type of the selected user must be in the CS domain.

If the currently selected LDR action is a PS-specific system switch, the user is selected according to the following content: All users who have a P-specific system handover penalty state in the cell are not selected, that is, users that have not been selected by the PS different system switching action, according to The PK values are sorted. When the PK values are the same, the number of times the LDR is selected by the user is from small to large; in the ranked user list, N users are selected from the front to the back, and the N is less than or equal to one PS. The system switches the maximum number of users M.

In addition, the user to be selected must be a steady state user and not for DRNC/emergency/CMB/robbed users, not for gold eight VPS users. The service type of the selected user must be in the PS domain and not in the H user.

If the currently selected LDR action is an uncontrollable real-time service Qos renegotiation, select the user /RAB as follows:

All RABs whose QoS re-negotiating penalty status is NO in the corresponding direction in the cell (that is, the RAB that has not been selected by the Qos re-negotiation action) are sorted according to their PK values. When the PK values are the same, the number of times the LDR is selected by the user is determined. Small to large order; N RABs are selected from the front to the back in the ranked RAB list, the N being less than or equal to one renegotiation maximum RAB 3⁄4 M.

In addition, the user to which the selected RAB belongs is required to be a steady-state user, and is not a DRNC/emergency/CMB/robbed user; the selected RAB is not HSUPA/HSDPARAB, not a gold medal/WPS RAB, business Session and stream services of type PS domain. Because the maximum rate and guaranteed rate of the non-BE service of the PS service can be negotiated, the maximum rate is not required to be greater than the guaranteed rate.

S4. Perform a selected LDR move on the credit resource currently occupied by the selected user or the RAB. To relieve the congestion of credit resources.

After performing the currently selected LDR action, if the credit resource congestion is not released, the next LDR action is selected according to the order of priority between the candidate LDR actions described in step S2, and the execution continues. Steps S3 and S4, until the congestion of the credit resource is released.

The embodiment of the present invention further provides a device for resolving credit resource congestion. Referring to FIG. 2, the method includes: a congestion decision module, an LDR action selection module, an RAB selection module, and an LDR action execution module.

The congestion decision module is configured to perform a congestion decision on a credit resource. At least one of the following decisions is made: a decision of the NodeB uplink credit resource congestion; a decision of the NodeB downlink credit resource congestion; a decision of the local cell group uplink credit resource congestion; a local cell group downlink credit resource congestion decision; a local cell uplink credit resource congestion The judgment of the local cell downlink credit resources is congested.

The LDR action selection module is configured to select a load reorganization LDR action when the congestion determination module determines that the credit resource is congested. The alternative LDR actions are in order of priority from high to low, such as BE service slowdown, CS different system switching, PS different system switching, and uncontrolled real-time service Qos renegotiation.

The RAB selection module is configured to select a user or an RAB according to the LDR action selected by the LDR action selection module. When the RAB selection block fails to select an appropriate user or RAB according to the currently selected LDR action of the LDR action selection block, the trigger LDR action selection module selects the next order according to the priority of the alternate LDR action from high to 氐. LDR action.

The LDR action execution module is configured to perform an LDR action selected by the selected user of the RAB selection module or the credit resource currently occupied by the RAB. After the LDR action execution module performs the LDR action currently selected by the LDR action selection module, if the congestion decision module determines that the credit resource congestion is not resolved, the LDR action execution module triggers the LDR action selection module to perform the alternate LDR action. The next LDR action is selected in descending order of priority.

In summary, the embodiment of the present invention first performs a congestion decision on a credit resource. When it is determined that the credit resource is congested, the load reforming LDR action is selected, and the RAB is selected according to the selected LDR. Or user. The selected LDR action is then performed on the selected RAB or the credit resource currently occupied by the user. Therefore, the embodiment of the present invention can relieve the congestion of credit resources.

Obtaining the load status of the cell credit resource by maintaining the three levels of credit resources of the NodeB, the local cell group, and the local cell, and according to the configured cell credit threshold parameter and the RNC level credit congestion control switch, if necessary, The corresponding congestion load is controlled to appropriately reduce the occupation of credit resources by low-priority users and re-equalize credit resources. As far as possible, reserve appropriate resources for subsequent users to avoid a call loss rate increase due to a large number of users concentrated in a certain NODEB/cell group/small area, and provide a certain system capacity. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for relieving congestion of a credit resource, comprising the steps of: performing a congestion judgment on a credit resource;

When it is determined that the credit resource is congested, the load reconfiguration LDR action is selected, and the radio access bearer RAB or the user is selected according to the selected LDR action;

The selected LDR action is performed on the selected RAB or the credit resource currently occupied by the user to relieve the congestion of the credit resource.

2. The method according to claim 1, wherein the congestion judgment is performed on the credit resource, and at least one of the following judgments is performed:

Decision of base station uplink credit resource congestion; decision of base station downlink credit resource congestion; decision of local cell group uplink credit resource congestion; decision of local cell group downlink credit congested congestion; local cell uplink credit resource congestion decision; local cell downlink credit Resource congestion judgment.

The method according to claim 1 or 2, wherein in the congestion judgment on the credit resource,

When the uplink and downlink channels independently allocate credit resources, the congestion decision formula for the uplink credit resources of the base station is (C _UL consume, Nodee) ui Thr > C _UL capacity Credit, NodeB ― ^UL Used Credit, NodeB,

Consume ocal celt group) Ui Thr > ^UL Capacity Credit, local cell group ^UL Used Credit, local cell group, when the uplink and downlink channels independently allocate credit resources, the congestion judgment formula for the uplink credit resources of the local cell is (c _yi Consume JLocal cell Thr > ^UL Capacity Credit Jocal cell ― ^UL Used Credit, local cell, when the uplink and downlink channels independently allocate credit resources, the congestion decision formula for the downlink credit resources of the base station is (C _D Consume, NodeB Thr > C _DL capacity Credit, NodeB —— ^DL Used Credit, NodeB,

Consume, local cell group Thr > Capacity Credit, local cell group- DL Used Credit, local cell group, when the uplink and downlink channels independently allocate credit resources, the congestion decision formula for the downlink credit resources of the local cell is (C _Di Consume ocal cell Thr > ^DL Used Credit, local cell ― ^DL Used Credit Jocal cell, when the upstream and downstream channels share credit resources, the congestion decision formula for the uplink credit resources of the base station is (C _Ui+J3⁄4 Consume NodeB Thr > ^Capacity Credit, NodeB ~~ ^Used Credit, NodeB,

Credit Jocal cell group,

When the uplink and downlink channels share the credit resources, the congestion decision formula for the uplink credit resources of the local cell is (C _W Consume Jocal cet ) {Jl Thr > ^Capacity Credit Jocal cell_^Used Credit Jocal cell,

When the uplink and downlink channels share the credit resources, the congestion judgment formula for the downlink credit resources of the base station is (C Consume, NodeB Thr > ^Capacity Credit, NodeB_Used Credit, NodeB '

When the uplink and downlink channels share the credit resources, the congestion determination formula for the downlink credit resources for the local cell group is PuL+DL Consume Jocal cell group). , Thr > C Capacity Credit Jocal cell group ^Vsed Credit Jocal cell group ,

When the uplink and downlink channels share the credit resources, the congestion judgment formula for the downlink credit resources of the local cell is

Credit Jocal cell,

In the above formula, ^. . Indicates the total credit resource size; c. _{Used Credit} * indicates the size of the used credit resource;

Indicates the size of the reserved credit resource.

4. The method according to claim 1, wherein the LDR action is selected in descending order of priority according to an alternative LDR action; wherein the candidate LDR action is in order of priority in order of priority Type service slowdown, circuit switched heterosystem switching, packet switched heterosystem switching, and uncontrolled real-time service quality of service renegotiation.

5. The method of claim 4, wherein when the selected LDR action is a best effort When the type of service is slowed down or the uncontrolled real-time service quality is re-negotiated, the selecting the RAB according to the selected LDR action includes the following steps:

All RABs with a penalty status of the currently selected LDR action are sorted according to their PK values. When the PK values are the same, the number of times the LDR is selected by the user is from small to large; in the sorted RAB list. N RABs are selected from front to back, and the N is less than or equal to the maximum number of RABs of the currently selected LDR action.

6. The method according to claim 4, wherein when the selected LDR action is a circuit switched different system switch or a packet switched different system switch, the selecting the user according to the selected LDR action comprises the following steps:

All RABs with a penalty state of the currently selected LDR action are sorted according to their PK values. When the PK values are the same, the number of times the LDR is selected by the user is from small to large; in the sorted user list. N users are selected from front to back, and the N is less than or equal to the maximum number of users of the currently selected LDR action.

7. The method according to claim 4, wherein, according to the currently selected LDR action, the appropriate RAB is not selected, and the next LDR action is selected according to the priority of the candidate LDR action from high to low. .

8. The method according to claim 4, wherein, after performing the currently selected LDR action, if the credit resource congestion is not released, the priority of the candidate LDR action is selected in descending order of priority. An LDR action.

9. A device for relieving congestion of credit resources, comprising:

a congestion decision module, configured to perform congestion judgment on credit resources;

The LDR action selection module is configured to select a load reforming LDR action when the congestion determination module determines that the credit resource is congested;

The RAB selection module is configured to select the RAB or the user according to the LDR action selected by the LDR action selection module;

The LDR action execution module is configured to perform an LDR action selected by the LDR action selection module on the selected RAB of the RAB selection block or the credit resource currently occupied by the user.

10. The apparatus according to claim 9, wherein the congestion determination module performs at least one of the following: a decision of a base station uplink credit resource congestion; a base station downlink credit resource congestion decision; a local cell group uplink credit resource congestion The decision of the local cell group downlink credit resource congestion; the local cell uplink credit resource congestion decision; the local cell downlink credit resource congestion.

11. The apparatus according to claim 9, wherein the LDR actions of the LDR action selection module are in descending order of priority: descending service speed reduction, circuit switching different system switching, Packet switched hetero-system switching, and uncontrolled real-time service quality of service renegotiation.

12. The apparatus according to claim 11, wherein the LDR action execution module executes the LDR action currently selected by the LDR action selection module, and if the congestion decision module determines that the credit resource congestion is not resolved, the LDR The action execution module triggers the LDR action selection module to select the next LDR action according to the order of priority of the alternate LDR action from high to low.

13. The apparatus according to claim 11, wherein the RAB selection module fails to select an appropriate RAB or user according to the LDR action selected by the LDR action, and triggers the LDR action selection module to prepare The priority of the LDR action is selected from the highest to the lowest order to select the next LDR action.