CN103581875B - Load of base station information interacting method and base station - Google Patents

Abstract

The invention provides a kind of load of base station information interacting method and base station, wherein, load of base station information interacting method includes: the first base station receives the second base station resource status more new information according to very first time periodic report；When determining that the second base station is in load early warning or higher load condition according to resource status more new information, start the intervalometer preset；Judge that the second base station of reception the most all indicates the second base station to be in load early warning or higher load condition according to all resource status more new information of very first time periodic report within the second time cycle that intervalometer sets；The most then when the second time cycle time-out that intervalometer sets, send instruction to the second base station and stop reporting the message of resource status more new information, so that the second base station stops reporting to the first base station resource status more new information.By the present invention, reduce the X2 link circuit resource waste caused because of continuous interactive and the impact on the normal switching on X2 link.

Description

Base station load information interaction method and base station

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method for load information interaction between base stations and a base station.

Background

In the communication field, due to the difference of propagation characteristics, the F band (1880-1920 MHZ) has the advantage of larger coverage than the D band (2575-2615 MHZ), but the F band has less frequency resources than the D band. If only the F band is deployed in a TD-LTE (Time Division-Long Term Evolution) network, a problem of insufficient system capacity will be encountered in a hot spot area with a large data traffic demand. When a double-layer networking mode that the D frequency band and the F frequency band are covered simultaneously is adopted, the covering advantages of the F frequency band and the frequency resource advantages of the D frequency band can be simultaneously utilized, the purposes that the covering is guaranteed through the F frequency band at the marginal area, the load is shared through the D frequency band at the central area, and the capacity is absorbed are achieved.

In a dual-layer networking mode in which the D frequency band and the F frequency band are covered, load balancing switching is a common operation. Currently, when the load balance of the F band and the D band of the different manufacturers is switched, when the eNB1 (eNodeB 1, base station 1) reaches a cell load warning or a high load, the eNB2 (base station 2) is initially requested to report the cell load continuously with a specified time as a cycle. This process is triggered by a RESOURCE STATUS REQUEST message sent from eNB1 to eNB2 as shown in fig. 1; upon receiving this message, if the Registration Request IE is "start", eNB2 should start the requested measurements according to the parameters given in the Request; if the Registration Request IE is "stop", eNB2 should terminate the reporting. Wherein if the Registration Request IE is set to "start", a Report Characteristics IE (Report Characteristics information element) should be included in the RESOURCE STATUS REQUEST message. For each requested cell, the eNB2 should contain a message RESOURCE STATUS update message. If a Reporting Periodicity IE (report period information element) is included in the RESOURCE STATUS REQUEST message, the eNB2 should take its value as the time interval between two successive measurement reports. If the eNB2 can provide the RESOURCE status information, it should start the measurement and report a RESOURCE status response message as reported by eNB 1.

In the foregoing process, the operation flow of eNB2 after receiving the RESOURCE STATUS request message of eNB1 is shown in fig. 2, where the operation of eNB2 includes: step S102, receiving RESOURCE STATUS REQUEST message of adjacent base station; step S104, checking a Registration REQUEST IE in a RESOURCE STATUS REQUEST message, if the Registration REQUEST IE is 'start', executing step S106, and if the Registration REQUEST IE is 'stop', executing step S118; step S106, when the Registration Request IE is 'start', the measurement ID of the base station is distributed; step S108, measurement initialization check; step S110, determining whether to initialize measurement, if so, executing step S112, and if not, executing step S116; step S112, feeding back RESOURCE STATUS RESPONSE message; step S114, adding the measurement information of the neighboring cell in the neighboring cell measurement list L, and ending the operation; step S116, feeding back RESOURCE STATUS FAILURE message, and ending the operation; step S118, feeding back to the RESOURCE STATUS RESPONSE message of the adjacent cell; step S120, deleting the measurement information of the neighboring cell in the neighboring cell measurement list L; step S122, the measurement ID allocated by the base station for measurement is released, and the operation is ended.

In the above operation flow, measurement information is added to the neighbor cell measurement list L, and then the eNB2 obtains the measurement result of the load information from the base station load information statistics module, organizes the resource state UPDATE message resourcestestate according to all neighbor cells and related measurement contents in the neighbor cell measurement list L, and reports the message period to the eNB 1. The reporting period of the RESOURCE STATUS message specifies a time period (defined as a timer t 2) for reporting periodicity carried in the RESOURCE STATUS REQUEST message sent by the eNB1, and the time period is generally set to 1000ms, 2000ms, 5000ms, 10000ms, and the like.

In the process of periodically reporting the RESOURCE STATUS UPDATE, if the eNB2 receives a RESOURCE STATUS REQUEST message sent by the eNB1 and the Registration REQUEST IE carried in the message is "stop", the corresponding measurement content in the neighbor measurement list L is directly deleted, the timer t2 is closed, and the reporting process is terminated.

According to the above implementation procedure, the reporting of the RESOURCE STATUS UPDATE message by the eNB1 is performed at a specified time period of reporting periodicity carried in the RESOURCE STATUS REQUEST message sent by the eNB 1. In this process, if eNB2 is in a load warning or high load state, and eNB1 is still in a load warning or high load state, that is, before the cell load state is not restored to the normal state, it will not send the RESOURCE STATUS Request message carrying Registration Request IE "stop" to eNB2, and eNB2 will continuously report the RESOURCE STATUS UPDATE message. In this case, eNB1 has been unable to balance the user load to eNB2, but eNB2 continues to report the resourcesttatus UPDATE message by occupying the X2 link resources.

It can be seen that the load information interaction in the load balancing process causes resource waste of the X2 link, and not only redundant signaling interaction exists, but also normal transmission of the signaling in the switching process on the X2 link is affected.

Disclosure of Invention

The invention provides a base station load information interaction method and a base station, which are used for solving the problems that the load information interaction in the existing base station load balancing process causes the waste of X2 link resources, redundant signaling interaction exists, and the normal transmission of signaling in the switching process on an X2 link is influenced.

In order to solve the above problems, the present invention discloses a base station load information interaction method, which comprises: a first base station receives a resource state updating message reported by a second base station according to a first time period; when the second base station is determined to be in a load early warning state or a high load state according to the resource state updating message, starting a preset timer; judging whether all the received resource state updating messages reported by the second base station according to the first time period indicate that the second base station is in the load early warning or high load state within a second time period set by the timer; if so, sending a message indicating to stop reporting the resource state update message to the second base station when the second time period set by the timer expires, so that the second base station stops reporting the resource state update message to the first base station.

Preferably, the step of determining that the second base station is in a load warning or high load state according to the resource state update message includes: acquiring wireless resource utilization rate information, hardware load indication information or transport network layer load indication information from the resource state updating message; judging that the utilization rate of the physical resource blocks indicated by the corresponding wireless resource utilization information exceeds a set threshold value, and determining that the second base station is in a load early warning or high load state; or, if the hardware load indicated by the corresponding hardware load indication information is judged to be high or overload, determining that the second base station is in a load early warning or high load state; or, if the transport network layer load indicated by the corresponding transport network layer load indication information is judged to be high or overloaded, it is determined that the second base station is in a load early warning or high load state.

Preferably, the resource status update message reported by the second base station carries integrated available capacity group information, where the integrated available capacity group information is used to indicate a global available resource level; the integrated available capacity group information comprises a cell capacity grade value information unit and/or a capacity value information unit, the cell capacity grade value information unit is used for indicating the relation between the capacity and the bandwidth of a cell, and the capacity value information unit is used for indicating the residual capacity of the cell; the step of determining that the second base station is in a load early warning or high load state according to the resource state update message includes: acquiring the comprehensive available capacity group information from the resource state updating message; judging that the relation between the capacity and the bandwidth of the cell indicated by the cell capacity grade value information unit in the comprehensive available capacity group information meets a set standard; and/or judging that the residual capacity of the cell indicated by the capacity value information unit in the comprehensive available capacity group information meets the set capacity; and determining that the second base station is in a load early warning or high load state.

Preferably, the method further comprises: if the resource state updating message indicating that the second base station is not in the load early warning or high load state exists in all the received resource state updating messages reported by the second base station according to the first time period is judged to be in the second time period set by the timer; and restarting the timer, and continuing to execute the step of judging whether all the received resource state update messages reported by the second base station according to the first time period indicate that the second base station is in the load early warning or high load state within a second time period set by the timer.

Preferably, before the step of the first base station receiving the resource status update message reported by the second base station according to the first time period, the method further includes: when the first base station judges that the base station is in a load early warning or high load state, sending a request message for indicating reporting of the resource state of the second base station to the second base station, wherein the request message carries information for indicating that a reporting period is the first time period and load information for indicating reporting, and the load information is one of the following: wireless resource utilization rate information, hardware load indication information, transport network layer load indication information and comprehensive available capacity group information; the first base station receives a resource state response message fed back by the second base station; the step that the first base station receives the resource state updating message reported by the second base station according to the first time period comprises the following steps: and after receiving the resource state response message fed back by the second base station, the first base station receives the resource state update message reported by the second base station according to the request message.

In order to solve the above problem, the present invention also discloses a base station, including: a first receiving module, configured to receive a resource status update message reported by another base station according to a first time period; a starting module, configured to start a preset timer when it is determined that the other base station is in a load warning state or a high load state according to the resource state update message; a determining module, configured to determine whether, within a second time period set by the timer, all resource state update messages received by the other base station according to the first time period indicate that the other base station is in the load warning state or the high-load state; a first executing module, configured to send, if the determination result of the determining module is yes, a message indicating to stop reporting the resource state update message to the other base station when the second time period set by the timer expires, so that the other base station stops reporting the resource state update message to the base station.

Preferably, when determining that the another base station is in a load warning or high load state according to the resource state update message, the starting module: acquiring wireless resource utilization rate information, hardware load indication information or transport network layer load indication information from the resource state updating message; judging that the utilization rate of the physical resource blocks indicated by the corresponding wireless resource utilization information exceeds a set threshold value, and determining that the other base station is in a load early warning or high load state; or, if the hardware load indicated by the corresponding hardware load indication information is judged to be high or overload, determining that the other base station is in a load early warning or high load state; or, if the transport network layer load indicated by the corresponding transport network layer load indication information is judged to be high or overloaded, it is determined that the other base station is in a load early warning or high load state.

Preferably, the resource status update message reported by the other base station carries integrated available capacity group information, where the integrated available capacity group information is used to indicate a global available resource level; the integrated available capacity group information comprises a cell capacity grade value information unit and/or a capacity value information unit, the cell capacity grade value information unit is used for indicating the relation between the capacity and the bandwidth of a cell, and the capacity value information unit is used for indicating the residual capacity of the cell; the starting module is used for determining that the other base station is in a load early warning or high load state according to the resource state updating message: acquiring the comprehensive available capacity group information from the resource state updating message; judging that the relation between the capacity and the bandwidth of the cell indicated by the cell capacity grade value information unit in the comprehensive available capacity group information meets a set standard; and/or judging that the residual capacity of the cell indicated by the capacity value information unit in the comprehensive available capacity group information meets the set capacity; determining that the other base station is in a load warning or high load state.

Preferably, the base station further includes: a second executing module, configured to, if the determining module determines that, in a second time period set by the timer, a resource state update message indicating that the other base station is not in the load warning or high-load state exists in all resource state update messages reported by the other base station according to the first time period; and restarting the timer and returning to the judgment module to continue executing.

Preferably, the base station further includes: a request module, configured to send a request message indicating reporting of a resource state of another base station to the another base station when it is determined that the base station is in a load warning state or a high load state before the first receiving module receives a resource state update message reported by another base station according to a first time period, where the request message carries information indicating that a reporting period is the first time period and load information indicating reporting, and the load information is one of: wireless resource utilization rate information, hardware load indication information, transport network layer load indication information and comprehensive available capacity group information; a second receiving module, configured to receive a resource status response message fed back by the other base station; the first receiving module is configured to receive the resource state update message reported by the other base station according to the request message after receiving the resource state response message fed back by the other base station.

Compared with the prior art, the invention has the following advantages:

in the invention, when a certain base station reaches cell early warning or high load and needs to carry out load balancing, and when the base station reporting the resource state updating message also reaches cell early warning or high load when carrying out load information interaction with other base stations, the base station needing to carry out load balancing judges the load condition of the base station reporting the resource state updating message through a timer, if the base station reporting the resource state updating message is always in the load early warning or high load state within a time period set by the timer, the base station sending a message requesting to report the resource state updating message stops reporting the load condition when the timer is overtime, thereby avoiding X2 link resource waste and influence on normal switching on an X2 link caused by continuous reporting. The invention solves the problems that the load information interaction in the load balancing process of the prior base station causes the resource waste of an X2 link, not only has redundant signaling interaction, but also influences the normal transmission of the signaling in the switching process on the X2 link, optimizes the processing flow of the cell load information mutual-reporting signaling, and effectively reduces the resource waste of the X2 link and the influence on the normal switching on the X2 link caused by continuous interaction.

Drawings

FIG. 1 is a signaling interaction diagram in a process of load balancing between base stations according to the prior art;

FIG. 2 is a flow chart of the operation of a base station after receiving a resource status request message according to the prior art;

fig. 3 is a flowchart illustrating steps of a method for exchanging base station load information according to a first embodiment of the present invention;

fig. 4 is a signaling interaction diagram of base station load information interaction according to a second embodiment of the present invention;

fig. 5 is a flowchart illustrating steps of a method for exchanging base station load information according to a third embodiment of the present invention;

fig. 6 is a block diagram of a base station according to a fourth embodiment of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Example one

Referring to fig. 3, a flowchart illustrating steps of a base station load information interaction method according to an embodiment of the present invention is shown.

The base station load information interaction method of the embodiment comprises the following steps:

step S202: and the first base station receives the resource state updating message reported by the second base station according to the first time period.

When a base station needs to implement Load balancing due to insufficient resources of the base station, the base station may transfer Load information of the base station through an X2 interface, for example, the first base station sends a Resource state Request message to the second base station to Request the second base station to report the Resource state information, where the Request includes Resource content that the second base station needs to report, such as a Radio Resource state (Radio Resource Status), a transport Network layer Load Indicator (tnl) (transport Network layer) of an S1 interface, a hardware Load Indicator (hw) (hard ware) or a Composite Available Capacity Group (Composite Available Capacity Group), and the Request further includes a Reporting period (Reporting performance) reported by the second base station and a cell identifier that needs to be reported; after receiving the Resource state request sent by the first base station, the second base station executes measurement according to the Resource content which needs to be reported and is contained in the request, and returns a Resource state Response message to the first base station, wherein the Response does not contain the Resource state information of the second base station; then, the second base station transmits a resource status Update message to the first base station at a specified time interval according to the received resource status request, wherein the Update signaling includes radio resource status of the specified cell, transport network layer load indication of the S1 interface, hardware load indication, or comprehensive available capacity group information. Wherein, the content reported by the second base station is consistent with the content contained in the resource state request sent by the first base station.

That is, in this step, the second base station sends a Resource Status Update message to the first base station after receiving the Resource Status request message sent by the first base station and returning the Resource Status Response message. The message carries radio Resource Status, transport network layer load indication, hardware load indication, or comprehensive available capacity group information according to the requirement of the Resource Status Request message.

Step S204: and when the first base station determines that the second base station is in a load early warning state or a high load state according to the resource state updating message, starting a preset timer.

The timer is different from a timer for setting a time interval (Reporting Periodicity) reported by the second base station, and generally, the time period set by the timer is longer than the time period of the time interval reported by the second base station, but the specific time setting can be set by those skilled in the art as appropriate according to actual needs.

Step S206: the first base station judges whether all the received resource state updating messages reported by the second base station according to the first time period indicate that the second base station is in a load early warning state or a high load state in a second time period set by the timer; if yes, go to step S208; if not, go to step S210.

In this embodiment, the time period set by the preset timer is recorded as the second time period, and the first time period is a time period set by the timer that sets the time interval reported by the second base station (that is, the time period carried in the resource status request and specifying the time interval reported by the second base station). If the second base station is in the load early warning state or the high load state all the time in the second time period, executing step S208, and the first base station sending a message for stopping reporting to the second base station; if the second base station is not always in the load warning or high load state within the second time period, a person skilled in the art may perform appropriate setting according to actual requirements, for example, continuously report the resource state update message according to a conventional flow, or restart the timer, or perform load operation according to a certain rule, and the like.

Step S208: if all the received resource state update messages reported by the second base station according to the first time period indicate that the second base station is in a load early warning state or a high load state within the second time period set by the timer, the first base station sends a message indicating that the reporting of the resource state update messages is stopped to the second base station when the second time period set by the timer is overtime, so that the second base station stops reporting the resource state update messages to the first base station, and the reporting process is ended.

Step S210: and if all the resource state updating messages reported by the second base station according to the first time period exist in the received second resource state updating messages and indicate that the second base station is in a non-load early warning or non-high load state, executing the subsequent flow according to the set operation.

As described above, the setting operation may be to continue reporting the resource status update message according to the conventional procedure, or restart the timer, or perform a load operation according to a certain rule, or the like. Of course, other suitable operations are equally applicable.

In this embodiment, when a certain base station reaches cell early warning or high load, needs to perform load balancing, and performs load information interaction with other base stations, when a base station reporting a resource state update message also reaches cell early warning or high load, the base station needing to perform load balancing determines the load condition of the base station reporting the resource state update message through a timer, and if the base station reporting the resource state update message is always in a load early warning or high load state within a time period set by the timer, the base station sending a message requesting the report of the resource state update message terminates the report load condition when the timer is overtime, thereby avoiding the waste of X2 link resources and the influence on normal switching on an X2 link caused by continuous reporting. Through the embodiment, the problems that the resource waste of the X2 link is caused by the load information interaction in the existing base station load balancing process, redundant signaling interaction exists, and the switching on the X2 link is influenced are solved, the cell load information mutual-reporting signaling processing flow is optimized, and the resource waste of the X2 link and the influence on the normal switching on the X2 link caused by continuous interaction are effectively reduced.

Example two

Referring to fig. 4, a signaling interaction diagram of base station load information interaction according to a second embodiment of the present invention is shown.

In this embodiment, the first base station is represented by eNB1, the second base station is represented by eNB2, a timer t3 is added to eNB1, and if information carried in a RESOURCE STATUS UPDATE message reported by eNB2 by t3 meets one of the following conditions, eNB1 starts the timer t 3:

(1) radio resource usage (which may be UL/DL GBR PRBusage (uplink/downlink guaranteed bit rate physical resource block usage), or UL/DL non-GBR PRBusage (uplink/downlink non-guaranteed bit rate physical resource block usage), or UL/DL total PRBusage (uplink/downlink total physical resource block usage)), that is, UL/DL PRB usage (uplink/downlink physical resource block usage) exceeds a threshold (i.e., a set threshold) preset by a local area (i.e., eNB 1) for determining overload of an adjacent area;

(2) a HW load indicator (i.e., UL/DL HW load: low, mid, high, overload (uplink/downlink hardware load: value may be low, medium, high, or overload)) is "high" or "overload";

(3) the TNL load indicator (transport network layer load indication) (i.e. UL/DL TNL load: low, mid, high, overload (uplink/downlink transport network layer load: value may be low, medium, high, or overload)) is "high" or "overload".

(4) Composite Available Capacity Group (this value indicates the global level of Available resources (i.e. the level of all or the Composite Available Capacity of a cell), which comprehensively takes into account radio resource usage, HW load indicator, TNL load indicator, and the load situation of the neighbor cells). The Composite Available Capacity Group contains two IEs (information elements): [1] cell Capacity Class value (i.e., Cell Capacity Class value IE, indicating the relation between the Capacity and the bandwidth of a Cell, which is not included in the intra-LTE scenario); [2] capacity value (i.e. a Capacity value IE indicating the cell remaining Capacity of UL/DL, which may be in the form of a percentage of the remaining Capacity). The Composite Available Capacity Group can carry at least one of the two IEs, and when the Cell Capacity Class value meets a set standard; and/or, when the Capacity value meets the set Capacity, starting a timer t 3.

When any of the above conditions is satisfied, the eNB1 starts a timer t 3. After the timer T3 is started, in a corresponding T3 period (i.e., a second time period), if the RESOURCE STATUS UPDATE message reported by the eNB2 continuously satisfies one of the above conditions, the timer T3 times out, the eNB1 sends a RESOURCE STATUS REQUEST message to the eNB2 (Registration REQUEST IE is "stop") and the eNB2 terminates reporting the RESOURCE STATUS UPDATE message after receiving the message; after the timer T3 is started, in a period T3, if the RESOURCE status message reported by the eNB2 does not satisfy one of the above conditions once, the timer T3 is restarted; if the eNB1 satisfies that the cell load of the base station is normal, the timer t3 is turned off, and a RESOURCE STATUS REQUEST (Registration REQUEST IE is "stop") message is directly sent to the eNB2 according to the conventional procedure.

Based on the above setting, the signaling interaction of the base station load information interaction of this embodiment includes:

step S302: when eNB1 is in a load warning or high load state, it sends a resourcestatatus REQUEST (Registration REQUEST IE "start") message to neighboring base station eNB 2.

For example, when the cell PRB usage rate of eNB1 exceeds the uplink (downlink) warning RESOURCE threshold or the high load threshold of the local area, eNB1 determines that the local base station is in a load warning or high load state, and sends a RESOURCE STATUS REQUEST (Registration REQUEST IE is "start") message to neighboring base station eNB 2.

That is, when the eNB1 determines that the PRB usage rate of the local base station exceeds the set threshold, it sends a request message indicating reporting of the resource status of the eNB2 to the eNB2, where in this embodiment, the request message is: the Registration Request IE is a RESOURCE STATUS REQUEST message of "start".

The request message carries information indicating that a Reporting period is a first time period (for example, Reporting period is indicated as T2), and load information indicating Reporting, where the load information is one of the following: radio resource usage (i.e., radio resource usage information), HW load indicator (i.e., hardware load indication information), TNL load indicator (i.e., transport network layer load indication information), Composite Available Capacity Group (i.e., integrated Available Capacity Group information).

Step S304: if the eNB2 can provide the RESOURCE STATUS information, it should start the measurement and feed back a RESOURCE STATUS RESPONSE message as reported by eNB 1.

That is, the eNB1 receives the RESOURCE STATUS RESPONSE message fed back by the eNB2, which is a RESOURCE STATUS RESPONSE message in this embodiment.

In this embodiment, the RESPONSE STATUS RESPONSE message is fed back successfully. However, if the requested measurement cannot be turned on, the eNB2 will send a resource status FAILURE message. The Cause IE in this message is set to a suitable value, e.g. "Measurement temporary not Available". In this case, the subsequent load information signaling interaction is no longer performed.

Step S306: after the eNB2 feeds back the RESOURCE STATUS RESPONSE message, it performs a RESOURCE STATUS REPORT, and REPORTs the RESOURCE STATUS REPORT message by using the time specified by the Reporting Periodicity carried in the RESOURCE STATUS REQUEST message as a period, where the message carries the load information to be reported indicated in the RESOURCE STATUS REQUEST message, and the load information includes one of the following 4 types:

[1].radio resource usage(UL/DL GBR PRB usage,UL/DL non-GBR PRBusage,UL/DL total PRB usage)；

[2].HW load indicator(UL/DL HW load:low,mid,high,overload)；

[3].TNL load indicator(UL/DL TNL load:low,mid,high,overload)；

[4] composite Available Capacity Group (this value indicates the global Available resource level, taking radio resource usage, HW load indicator, TNL load indicator and the load situation of the neighboring cells into account).

Wherein, the Composite Available Capacity Group contains two IEs:

[1] cell Capacity Class value (the relation between the Capacity of a Cell and the bandwidth, this IE is not included in the intra-LTE scenario);

[2] capacity value (percentage of cell remaining Capacity for UL/DL).

If the indicated measurement content includes a cell remaining Capacity value, statistics of other three measurement quantities (hardware, TNL, and radio load) is required to be completed, and then uplink/downlink cell remaining Capacity is calculated, where the three load information are associated with each other in terms of device implementation. In this embodiment, only the occupancy of the PRB is considered and the influence of the other two measurement quantities on the remaining capacity is not considered temporarily, then the cell remaining capacity is: CV = 100-Radio formula (1-1)

In the above equation (1-1), CV represents the remaining capacity of the cell in a certain direction, which is a percentage number, the minimum is 0, which represents that the cell has no resources to be re-occupied, and Radio is the equivalent Radio resource utilization of the cell in a certain direction, which is a percentage value range of [0, 100 ].

Radio in the formula (1-1) is defined as PRB utilization of GBR (guaranteed bit rate) traffic plus equivalent utilization of NGBR (non-guaranteed bit rate) traffic, and is related as follows:

Radio=GBR_PRBusage+NGBR_{PRBequivalent}formula (1-2)

The PRB utilization of the GBR service is a value reflected in the measurement result of the GBR in the following formula (1-3) or formula (1-4), and the equivalent PRB utilization of the NGBR service requires the conversion of the measurement result of the NGBR in the following formula (1-3) or formula (1-4). If the parameter is set according to the number of actually occupied PRBs, it is likely that an NGBR service with a large data volume will occupy the whole bandwidth, so that the neighboring cell cannot adjust the user to the cell, but the cell can actually accommodate more users and can provide satisfactory QoS.

The downlink PRB equivalent utilization rate is defined as formula (1-3):

${\mathrm{GBR}}_{\mathrm{PRBequivalent}\_\mathrm{DL}}=\frac{N_{\mathrm{used}\_\mathrm{DL}}}{{\mathrm{SBR}}_{\mathrm{DL}}}\×\underset{k=1}{\overset{n_{\mathrm{DL}}}{\mathrm{\Σ}}}{R}_{k\_\mathrm{DL}}$

${\mathrm{NGBR}}_{\mathrm{PRBequivalent}\_\mathrm{DL}}=\frac{N_{\mathrm{used}\_\mathrm{DL}}}{{\mathrm{SBR}}_{\mathrm{DL}}}\×\underset{k=1}{\overset{n_{\mathrm{DL}}}{\mathrm{\Σ}}}{R}_{k\_\mathrm{DL}}$

in the formula (1-3), N_{used_DL}The method can be used for bearing the average number of PRBs (physical resource blocks) occupied by one subframe, namely SBR (sequencing batch reactor) for the downlink NGBR_DLCarrying the total actual service rate, n, for a downstream NGBR_DLFor the number of downlink NGBR bearers, R_{k_DL}The minimum bit rate requirement for each NGBR.

And the equivalent utilization rate of the PRB in the uplink is defined as a formula (1-4):

${\mathrm{GBR}}_{\mathrm{PRBequivalent}\_\mathrm{UL}}=\frac{N_{\mathrm{used}\_\mathrm{UL}}}{{\mathrm{SBR}}_{\mathrm{UL}}}\×\underset{k=1}{\overset{n_{\mathrm{UL}}}{\mathrm{\Σ}}}{R}_{k\_\mathrm{UL}}$

$N{\mathrm{GBR}}_{\mathrm{PRBequivalent}\_\mathrm{UL}}=\frac{N_{\mathrm{used}\_\mathrm{UL}}}{{\mathrm{SBR}}_{\mathrm{UL}}}\×\underset{k=1}{\overset{n_{\mathrm{UL}}}{\mathrm{\Σ}}}{R}_{k\_\mathrm{UL}}$

in the formula (1-4), N_{used_UL}The method can be used for bearing the average PRB number occupied by one subframe, namely SBR (sequencing batch reactor) for the uplink NGBR_ULFor uplink NGBR to carry the total actual service rate, n_ULFor the number of uplink NGBR bearers, R_{k_UL}The PBR rate requirement for each NGBR.

Through the above process, the calculation of the cell remaining Capacity value based on the occupancy rate of the PRBs can be realized.

For the base station, after feeding back the RESOURCE STATUS RESPONSE message to the eNB1, the eNB2 reports the RESOURCE STATUS UPDATE message to the eNB1 according to the load information to be reported indicated in the RESOURCE STATUS REQUEST message. For eNB1, after receiving the RESOURCE STATUS RESPONSE message fed back by eNB2, eNB1 receives a RESOURCE STATUS UPDATE message reported by eNB2 according to the RESOURCE STATUS REQUEST message.

In this embodiment, for example, if the RESOURCE STATUS REQUEST message indicates that the eNB2 reports radio RESOURCE usage, the eNB2 carries radio RESOURCE usage information in the RESOURCE STATUS REQUEST message reported to the eNB 1. Other load information is similar to the radio resource usage information, and can refer to the radio resource usage information to perform subsequent signaling interaction.

Step S308: when the eNB2 reaches the cell load warning or high load, radio RESOURCE usage information carried in a RESOURCE STATUS UPDATE message reported to the eNB1 indicates that the current cell load state of the eNB2 is in a load warning or high load state.

Step S310: after receiving the RESOURCE STATUS UPDATE message, the eNB1 immediately starts the timer t3 if it is determined that the eNB2 has reached the cell load warning or high load.

As described above, when the information carried in the RESOURCE status message reported by the eNB2 satisfies one of the four conditions, the timer t3 of the eNB1 determines that the eNB2 has reached the cell load warning or the high load, and the eNB1 starts the timer t 3.

In this embodiment, because the radio RESOURCE usage information is carried in the RESOURCE STATUS UPDATE message, when determining whether the eNB2 is in the load warning or high load state, the eNB1 first acquires the radio RESOURCE usage information from the RESOURCE STATUS UPDATE message, determines whether the PRB usage rate indicated by the radio RESOURCE usage information exceeds a set threshold, and if the determination result is yes, determines that the eNB2 is in the load warning or high load state, and immediately starts the timer t 3.

Similarly, if the response STATUS REQUEST message indicates that the eNB2 reports HWload indicator information, and the response STATUS UPDATE message carries HWload indicator information, the eNB1, when determining whether the eNB2 is in a load early warning or high load state, first acquires the HWload indicator information from the response STATUS UPDATE message, determines whether the HWload indicated by the HWload indicator information is "high" or "overload", and if the determination result is yes, determines that the eNB2 is in a load early warning or high load state, and immediately starts the timer t 3.

If the response STATUS REQUEST message indicates that the eNB2 reports the TNL load indicator information and the response STATUS UPDATE message carries the TNL load indicator information, the eNB1, when determining whether the eNB2 is in the load early warning or high load state, first acquires the TNL load indicator information from the response STATUS UPDATE message, determines whether the TNL load indicated by the TNL load indicator information is "high" or "overload", and if the determination result is yes, determines that the eNB2 is in the load early warning or high load state, and immediately starts the timer t 3.

If the RESOURCE STATUS REQUEST message indicates that the eNB2 reports Composite Available bandwidth Group information, and the RESOURCE STATUS UPDATE message carries the Composite Available bandwidth Group information, the eNB1 acquires the Composite Available bandwidth Group information from the RESOURCE STATUS UPDATE message when judging whether the eNB2 is in a load early warning or high-load state, and judges whether the relation between the Capacity and the bandwidth of a Cell indicated by a Cell bandwidth Class IE in the Composite Available bandwidth Group meets a set standard; and/or judging whether the residual Capacity of the cell indicated by the Capacity value IE meets the set Capacity, if so, determining that the eNB2 is in a load early warning or high load state, and immediately starting a timer t 3.

Step S312: when the period T3 set by the timer T3 is overtime, if the eNB2 still reports cell load warning or high load, the eNB1 sends a RESOURCE STATUS REQUEST IE (stop) message to the eNB 2.

Step S314: after receiving the response STATUS REQUEST message (stop IE), eNB2 terminates reporting the response STATUS UPDATE message.

It should be noted that if the eNB1 determines that, in the T3 period set by the timer T3, the received all RESOURCE STATUS UPDATE messages reported by the eNB2 according to the first time period, i.e., the T2 period, have a RESOURCE STATUS UPDATE message indicating that the eNB2 is not in the load warning or high-load state; the timer T3 is restarted, and then the procedure of determining whether all the RESOURCE STATUS UPDATE messages reported by the eNB2 according to the T2 period indicate that the eNB2 is in the load warning or high load state in the T3 period is continuously performed. That is, after the timer T3 is started, in a period T3, if the corresponding one of the four conditions for starting the timer T3 is not met once in the RESOURCE STATUS UPDATE message reported by the eNB2, the timer T3 is restarted.

Through the embodiment, when the eNB2 achieves cell warning or high load, the eNB1 sends a message to request the eNB2 to terminate reporting the load condition by judging through the timer t3, thereby avoiding the waste of X2 link resources and the influence on normal handover on an X2 link caused by continuous reporting, optimizing the cell load information mutual reporting signaling processing flow, and effectively reducing the waste of X2 link resources and the influence on normal handover on an X2 link caused by continuous interaction.

EXAMPLE III

Referring to fig. 5, a flowchart illustrating steps of a method for interacting base station load information according to a third embodiment of the present invention is shown.

In this embodiment, the first base station is still represented by eNB1, the second base station is still represented by eNB2, and the start condition of the timer t3 in eNB1 is also as described in embodiment two.

The base station load information interaction method of the embodiment comprises the following steps:

step S402: the eNB1 determines that load balancing needs to be performed according to its own load condition, and sends a Resource Status Request message to the eNB 2.

For example, the eNB1 may detect that the cell load reaches or exceeds a predetermined threshold, wherein the cell load may be one or more of radio resource, transport network layer load, hardware load, or aggregate available capacity group, or may be a total parameter indicative of the cell load.

As more UEs are connected in a cell and the amount of traffic requested to establish by the UEs increases, the load of the cell increases, which may be expressed as less available radio resources, less available bandwidth of the S1 transport network layer, more and more hardware load, or less and less comprehensive available capacity group. Because the number of connected UEs directly managed by the cell is limited and the traffic is not large, the load of the cell cannot be significantly reduced by switching or releasing the part of UEs, and therefore when the load of the cell reaches or exceeds the set threshold, the base station sends a message to other base stations for load balancing. In the LTE system, base stations are connected through an X2 interface, and an X2 interface is used to complete mobility management functions of a user equipment UE in a connected state and information interaction between peer base stations.

In this embodiment, the Resource Status Request message sent by the eNB1 to the eNB2 carries Reporting Periodicity information indicating a time interval reported by the eNB2 and information indicating Resource content reported by the eNB2, where the reported Resource content may be one or more of Radio Resource Status, TNL Load Indicator, HW Load Indicator, or Composite Available Resource group, and the reported Resource content is the TNL Load Indicator in this embodiment. The Registration Request IE in the Resource Status Request message is "start" when requesting eNB2 for Resource measurement reporting, and is "stop" when instructing eNB2 to stop Resource measurement reporting.

Step S404: the eNB2 determines whether a Resource Status Request message sent by the eNB1 is received, if so, executes step S406; if not, continuing the current operation.

Step S406: eNB2 checks the Registration Request IE in the Resource Status Request message, and if the Registration Request IE is "start", performs step S408, and if the Registration Request IE is "stop", performs step S438.

Step S408: when the Registration Request IE is "start", eNB2 assigns the measurement ID of the own base station.

Step S410: eNB2 performs a measurement initialization check.

Step S412: the eNB2 determines whether to initiate measurement, if so, performs step S414, and if not, performs step S422.

Step S414: eNB2 feeds back a Resource Status Response message to eNB 1.

Step S416: the eNB2 adds the measurement information of eNB2 in the eNB1 measurement list L.

Step S418: the eNB2 obtains the measurement result of the load information, organizes the Resource Status Update message according to all the neighboring cells and related measurement contents in the measurement list L of the eNB1, and reports the message to the eNB1 according to the time interval indicated by the Reporting Periodicity information in the Resource Status Request message.

Step S420: the eNB2 returns to step S404 and executes it.

Step S422: the eNB2 feeds back a Resource Status Failure message eNB1, and ends the operation at the eNB2 side.

Step S424: the eNB1 receives the message fed back by the eNB2, and if the message is a Resource Status Response message, executes step S426; if the message is a Resource Status Failure message, the operation at the eNB1 side is ended.

Step S426: the eNB1 receives the Resource Status Update message fed back by the eNB2, determines whether the current load state of the eNB1 is normal, if yes, executes step S434; if not, go to step S428.

When the load status of eNB1 is normal, it indicates that eNB1 no longer needs to perform load balancing.

Step S428: the eNB1 determines whether the value of the TNL Load Indicator in the Resource Status Update message is "high" or "overload", and if so, executes step S430; if not, the process returns to step S426.

Step S430: the eNB1 starts a timer t 3.

Step S432: the eNB1 determines whether the value of the TNL Load Indicator in the received ResourceStatus Update message is "high" or "overload" within the time period T3 of the timer T3, and if yes, executes step S434; if not, the process returns to step S430, and restarts the timer t 3.

Step S434: eNB1 sends a Resource State Request message to eNB2, with the Registration Request IE in the message being "stop".

Step S436: return to step S404.

Step S438: the eNB2 feeds back the eNB1Resource Status Response message, deletes the measurement information of the eNB2 in the measurement list L of the eNB1, releases the measurement ID allocated by the eNB2 for measurement, and terminates the report.

Through the embodiment, when the eNB2 achieves cell warning or high load, the eNB1 sends a message to request the eNB2 to terminate reporting the load condition by judging through the timer t3, thereby avoiding the waste of X2 link resources and the influence on normal handover on an X2 link caused by continuous reporting, optimizing the cell load information mutual reporting signaling processing flow, and effectively reducing the waste of X2 link resources and the influence on normal handover on an X2 link caused by continuous interaction.

Example four

Referring to fig. 6, a block diagram of a base station according to a fourth embodiment of the present invention is shown.

The base station of this embodiment is provided with a base station load information interaction device, and includes: a first receiving module 502, configured to receive a resource status update message reported by another base station according to a first time period; a starting module 504, configured to start a preset timer when it is determined that another base station is in a load warning state or a high load state according to the resource state update message; a determining module 506, configured to determine whether, within a second time period set by the timer, all resource state update messages reported by another base station according to the first time period indicate that the other base station is in a load warning state or a high-load state; a first executing module 508, configured to send, if the determination result of the determining module 506 is yes, a message indicating to stop reporting the resource status update message to another base station when a second time period set by the timer expires, so that the other base station stops reporting the resource status update message to the base station.

Preferably, the starting module 504, when determining that another base station is in the load warning or high load state according to the resource state update message: acquiring wireless resource utilization rate information, hardware load indication information or transport network layer load indication information from a resource state updating message; judging that the utilization rate of the physical resource blocks indicated by the corresponding wireless resource utilization information exceeds a set threshold value, and determining that the other base station is in a load early warning or high load state; or, if the hardware load indicated by the corresponding hardware load indication information is judged to be high or overload, determining that the other base station is in a load early warning or high load state; or, if the transport network layer load indicated by the corresponding transport network layer load indication information is judged to be high or overloaded, determining that the other base station is in a load early warning or high load state.

Preferably, the resource status update message reported by the other base station carries the comprehensive available capacity group information, and the comprehensive available capacity group information is used for indicating the global available resource level; the comprehensive available capacity group information comprises a cell capacity grade value information unit and/or a capacity value information unit, the cell capacity grade value information unit is used for indicating the relation between the capacity and the bandwidth of a cell, and the quantity value information unit is used for indicating the residual capacity of the cell; the starting module 504, when determining that another base station is in a load early warning or high load state according to the resource state update message: acquiring comprehensive available capacity group information from the resource state updating message; judging that the relation between the capacity and the bandwidth of the cell indicated by the cell capacity grade value information unit in the comprehensive available capacity group information meets a set standard; and/or judging that the residual capacity of the cell indicated by the capacity value information unit in the comprehensive available capacity group information meets the set capacity; and determining that the other base station is in a load early warning or high load state.

Preferably, the base station of this embodiment further includes: a second executing module 510, configured to, if the determining module 506 determines that, in the second time period set by the timer, the received resource state update message reported by the other base station according to the first time period includes a resource state update message indicating that the other base station is not in the load warning or high load state; the timer is restarted and execution continues back at decision block 506.

Preferably, the base station of this embodiment further includes: a requesting module 512, configured to send, before the first receiving module 502 receives the resource state update message reported by another base station according to the first time period, a request message indicating to report the resource state of another base station to another base station when it is determined that the base station is in a load warning state or a high load state, where the request message carries information indicating that the reporting period is the first time period and load information indicating to report, and the load information is one of: wireless resource utilization rate information, hardware load indication information, transport network layer load indication information and comprehensive available capacity group information; a second receiving module 514, configured to receive a resource status response message fed back by another base station; a first receiving module 502, configured to receive a resource status update message reported by another base station according to the request message after receiving a resource status response message fed back by another base station.

The first receiving module 502 and the second receiving module 514 may be independently arranged or combined, and similarly, the first executing module 508 and the second executing module 510 may be independently arranged or combined.

The base station of this embodiment is configured to implement the corresponding method for exchanging the base station load information in the foregoing multiple method embodiments, and has the beneficial effects of the corresponding method embodiments, which are not described herein again.

The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the base station embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and for relevant points, refer to the partial description of the method embodiment.

The above detailed description is provided for the base station load information interaction method and the base station, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (10)

1. A method for interacting base station load information is characterized by comprising the following steps:

a first base station receives a resource state updating message reported by a second base station according to a first time period;

when the second base station is determined to be in a load early warning state or a high load state according to the resource state updating message, starting a preset timer;

judging whether all the received resource state updating messages reported by the second base station according to the first time period indicate that the second base station is in the load early warning or high load state within a second time period set by the timer;

if so, sending a message indicating to stop reporting the resource state update message to the second base station when the second time period set by the timer expires, so that the second base station stops reporting the resource state update message to the first base station.

2. The method of claim 1, wherein the step of determining that the second base station is in a load warning or high load state according to the resource status update message comprises:

acquiring wireless resource utilization rate information, hardware load indication information or transport network layer load indication information from the resource state updating message;

judging that the physical resource block utilization rate indicated by the corresponding wireless resource utilization rate information exceeds a set threshold, and determining that the second base station is in a load early warning or high load state;

or,

judging whether the hardware load indicated by the corresponding hardware load indication information is high or overloaded, and determining that the second base station is in a load early warning or high load state;

or,

and if the transmission network layer load indicated by the corresponding transmission network layer load indication information is judged to be high or overload, determining that the second base station is in a load early warning or high load state.

3. The method of claim 1, wherein the resource status update message reported by the second base station carries integrated available capacity group information, and the integrated available capacity group information is used for indicating a global available resource level; the integrated available capacity group information comprises a cell capacity grade value information unit and/or a capacity value information unit, the cell capacity grade value information unit is used for indicating the relation between the capacity and the bandwidth of a cell, and the capacity value information unit is used for indicating the residual capacity of the cell;

the step of determining that the second base station is in a load early warning or high load state according to the resource state update message includes:

acquiring the comprehensive available capacity group information from the resource state updating message;

judging that the relation between the capacity and the bandwidth of the cell indicated by the cell capacity grade value information unit in the comprehensive available capacity group information meets a set standard; and/or judging that the residual capacity of the cell indicated by the capacity value information unit in the comprehensive available capacity group information meets the set capacity;

and determining that the second base station is in a load early warning or high load state.

4. The method of claim 1, further comprising:

if the resource state updating message indicating that the second base station is not in the load early warning or high load state exists in all the received resource state updating messages reported by the second base station according to the first time period is judged to be in the second time period set by the timer;

and restarting the timer, and continuing to execute the step of judging whether all the received resource state update messages reported by the second base station according to the first time period indicate that the second base station is in the load early warning or high load state within a second time period set by the timer.

5. The method of claim 1, wherein before the step of the first base station receiving the resource status update message reported by the second base station according to the first time period, the method further comprises:

when the first base station judges that the base station is in a load early warning or high load state, sending a request message for indicating reporting of the resource state of the second base station to the second base station, wherein the request message carries information for indicating that a reporting period is the first time period and load information for indicating reporting, and the load information is one of the following: wireless resource utilization rate information, hardware load indication information, transport network layer load indication information and comprehensive available capacity group information;

the first base station receives a resource state response message fed back by the second base station;

the step that the first base station receives the resource state updating message reported by the second base station according to the first time period comprises the following steps: and after receiving the resource state response message fed back by the second base station, the first base station receives the resource state update message reported by the second base station according to the request message.

6. A base station, comprising:

a first receiving module, configured to receive a resource status update message reported by another base station according to a first time period;

a starting module, configured to start a preset timer when it is determined that the other base station is in a load warning state or a high load state according to the resource state update message;

a determining module, configured to determine whether, within a second time period set by the timer, all resource state update messages received by the other base station according to the first time period indicate that the other base station is in the load warning state or the high-load state;

a first executing module, configured to send, if the determination result of the determining module is yes, a message indicating to stop reporting the resource state update message to the other base station when the second time period set by the timer expires, so that the other base station stops reporting the resource state update message to the base station.

7. The base station of claim 6, wherein the starting module, when determining that the other base station is in a load warning or high load state according to the resource status update message:

acquiring wireless resource utilization rate information, hardware load indication information or transport network layer load indication information from the resource state updating message;

judging that the physical resource block utilization rate indicated by the corresponding wireless resource utilization rate information exceeds a set threshold, and determining that the other base station is in a load early warning or high load state;

or,

judging whether the hardware load indicated by the corresponding hardware load indication information is high or overloaded, and determining that the other base station is in a load early warning or high load state;

or,

and if the transmission network layer load indicated by the corresponding transmission network layer load indication information is judged to be high or overload, determining that the other base station is in a load early warning or high load state.

8. The base station of claim 6, wherein the resource status update message reported by the other base station carries integrated available capacity group information, and the integrated available capacity group information is used to indicate a global available resource level; the integrated available capacity group information comprises a cell capacity grade value information unit and/or a capacity value information unit, the cell capacity grade value information unit is used for indicating the relation between the capacity and the bandwidth of a cell, and the capacity value information unit is used for indicating the residual capacity of the cell;

the starting module is used for determining that the other base station is in a load early warning or high load state according to the resource state updating message:

acquiring the comprehensive available capacity group information from the resource state updating message;

judging that the relation between the capacity and the bandwidth of the cell indicated by the cell capacity grade value information unit in the comprehensive available capacity group information meets a set standard; and/or judging that the residual capacity of the cell indicated by the capacity value information unit in the comprehensive available capacity group information meets the set capacity;

determining that the other base station is in a load warning or high load state.

9. The base station of claim 6, further comprising:

a second executing module, configured to, if the determining module determines that, in a second time period set by the timer, a resource state update message indicating that the other base station is not in the load warning or high-load state exists in all resource state update messages reported by the other base station according to the first time period;

and restarting the timer and returning to the judgment module to continue executing.

10. The base station of claim 6, further comprising:

a request module, configured to send a request message indicating reporting of a resource state of another base station to the another base station when it is determined that the base station is in a load warning state or a high load state before the first receiving module receives a resource state update message reported by another base station according to a first time period, where the request message carries information indicating that a reporting period is the first time period and load information indicating reporting, and the load information is one of: wireless resource utilization rate information, hardware load indication information, transport network layer load indication information and comprehensive available capacity group information;

a second receiving module, configured to receive a resource status response message fed back by the other base station;

the first receiving module is configured to receive the resource state update message reported by the other base station according to the request message after receiving the resource state response message fed back by the other base station.