CN110248388B - Punishment method after cell switching rejection - Google Patents
Punishment method after cell switching rejection Download PDFInfo
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- CN110248388B CN110248388B CN201810195047.6A CN201810195047A CN110248388B CN 110248388 B CN110248388 B CN 110248388B CN 201810195047 A CN201810195047 A CN 201810195047A CN 110248388 B CN110248388 B CN 110248388B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/08—Reselecting an access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
Abstract
The embodiment of the invention provides a punishment method after cell switching refusal. The method comprises receiving a measurement report sent by a user terminal; if the punishment timer corresponding to the target cell is in a closed state, sending a switching request to the target base station; receiving a handover reply message sent by a target base station; if the resource type rejection message is judged and the rejection timer corresponding to the target cell is in an open state, increasing the value of the corresponding rejection counter; if the value of the judgment rejection counter exceeds the preset rejection counting threshold value, a penalty timer is started, the rejection timer is closed, and the rejection counter is rejected.
Description
Technical Field
The embodiment of the invention relates to the technical field of wireless communication, in particular to a punishment method after cell handover rejection.
Background
Currently, a User Equipment (UE) using a network service moves from a source LTE cell to a target LTE cell, or due to reasons such as adjustment of a wireless transmission service load, activation of operation and maintenance, and Equipment failure, in order to ensure continuity of communication and quality of service, a system needs to transfer a communication link between the User and the source cell to a new cell, which is a handover procedure. In the LTE system, the handover may be classified into intra-station handover, inter-station handover (based on X2 port handover or based on S1 port handover). When the source cell where the UE is located and the target cell to be switched do not belong to the same base station eNodeB, inter-station switching occurs, the inter-station switching process is complex, and signaling operations of X2 and S1 interfaces need to be added. The X2 handover occurs when the X2 interface data configuration is perfect and works well, otherwise the S1 handover occurs between the base stations. Generally, X2 switches are prioritized over S1 switches. The protocol 36.300 specifies that inter-eNodeB handovers are generally performed over the X2 interface, but that inter-eNodeB handovers over the S1 interface are triggered when any of the following conditions are met: (1) there is no X2 interface between the source eNodeB and the target eNodeB; (2) the source eNodeB attempts handover over the X2 interface, but is rejected by the target eNodeB. The base station sends different types of measurement tasks to the UE by using a mobility management algorithm according to different needs, and sends measurement configuration to the UE by carrying a MeasConfig cell in a Radio Resource Control (RRC) reconfiguration message; and after receiving the configuration information, the UE measures the measurement object, evaluates the result by using the measurement reporting standard, and sends a corresponding measurement report, such as events of A2\ A3 and the like, to the base station when the evaluated measurement result meets the reporting standard. The base station judges whether to execute switching or not through a measurement report reported by the terminal. When the decision condition is reached, the following steps are performed: preparing for switching: the target network completes the resource reservation; and (3) switching execution: the source base station informs the UE to execute switching, and the UE completes connection on the target base station; and (3) completing the switching: and the source base station releases resources and links and deletes the user information. The precondition for the X2 handover is that the target base station and the source base station are configured with an X2.33 link and the link is available. After receiving the measurement report, the target cell needs to send a handover application (whether the target cell has access resources) through an X2 interface; after the feedback of the target cell is obtained (at the moment, the resource preparation of the target cell is completed), a switching command is sent to the terminal, and an SNStatus Transfer message with information such as data packet cache, data packet cache numbers and the like is sent to a target side; after the UE is accessed in the target cell, the target cell sends a path change request to the core network, so as to inform the core network to transfer the service of the terminal to the target cell and update the node relation between the user plane and the control plane; and after the handover is successful, the target eNodeB informs the source eNodeB to release the radio resources. The X2 switching priority is greater than the S1 switching, so that the switching time delay is shorter, and the user perception is better. In the S1 handover procedure, the S1 handover procedure is similar to the X2 handover procedure, except that all inter-station signaling and data forwarding need to be forwarded to the core network through the S1 port, and the time delay is slightly longer than that of the X2 handover procedure. From the LTE network structure, the S1 interface between two enodebs and a Mobility Management Entity (MME) along with the MME Entity can be considered as one logical X2 interface. The flow of switching through the S1 interface differs between the switching preparation process and the switching completion process compared to the flow through the X2 interface. Preconditions for S1 handover: the target base station and the source base station are not configured with an X2 link or a configured X2 link is not available. If both X2 and S1 links are configured, the X2 handoff is prioritized. The flow does not cross MME and Serving GateWay (SGW), and is relatively simple. Even though cross-MME is involved, the main flow is not very different, mainly the signaling in the core network will be a bit more. The main difference between the handover preparation phase of the X2 handover and the handover of the S1 is that the target LTE cell directly feeds back the handover preparation reply or the target LTE cell informs the MME of the handover preparation reply, and the MME feeds back the handover preparation reply.
And the source LTE cell judges to carry out the next process according to a reply result after receiving the switching preparation reply, and enters a punishment mechanism if the received switching preparation reply is resource admission refusal. If the target LTE cell a feeds back (X2 handover)/MME feeds back (S1 handover) that the resource class is rejected to the source LTE cell in the handover preparation phase, and the source LTE cell analysis failure reason (resource admission failure and non-resource admission failure) feeds back the following reason values (No Radio Resources available in the target cell, Transport Resources unavailable, User Plane Processing Resources Not available, Radio Resources unavailable, Radio Resources Not available, and Control Plane Processing Overload) if the following reason values are fed back, it is determined that the resource admission failure occurs, and the source LTE cell takes a time mechanism penalty. The current network setting is generally 30 seconds, that is, in the current call process, the UeA does not respond to the source LTE cell once the handover request of the target cell a is reported again. (once the terminal UeA has switched, re-established, etc. within 30 seconds resulting in a release of the source LTE cell context, the terminal UeA returns to the source eNodeB, at which point the source LTE cell prepare failure penalty timer counter resets and the terminal UeA may reinitiate the handover attempt). If other reason values except the above are returned, the non-resource admission is judged to fail, and the source LTE cell punishs the target cell A for times. If the source LTE cell subsequently receives the UeA measurement report and contains the target cell a, the eNodeB will not initiate a handover request to the target cell a, while adding 1 to the penalty number. When the punishment number of the target cell a is accumulated to 60 times (the current network setting is mainly 60 times), the eNodeB receives UeA measurement report containing the target cell a, and can restart the handover request to the target cell a. If the target cell a again experiences a non-resource admission failure condition, for this UeA, the source LTE cell no longer initiates a handover request to the retried target cell a. The increase of the call drop rate due to the abnormal reason is prevented.
In the prior art, a point-to-point punishment is only performed on the terminal UeA and the target cell a in the current call process, and when the source LTE cell receives the resource class rejection in the handover preparation phase of UeA, the handover request of UeA for the target cell a is not forwarded to the MME within a certain time period in the current call. However, in a sudden large traffic scenario, a first handover request of the UE such as the terminal UeB or UeC to the target cell a must exist, and at this time, because of the first handover request, the source LTE cell cannot reject, and the target a cell coordination resource is still found, and of course, the result still fails to prepare the resource class, and finally, the resource class is rejected to be turned on in the source LTE cell side handover preparation phase for the UeB or UeC, but the failure of the first LTE handover request for the UeB or UeC already exists objectively. The existing network rejects the resource class of the scene with the large burst traffic, which has a certain vulnerability, still causes the situation that the resource class fails to appear many times in the scene with the large burst traffic and the LTE handover preparation phase triggered by different UEs fails, thereby causing a large amount of signaling consumption and resource waste.
Disclosure of Invention
The embodiment of the invention provides a punishment method after cell switching rejection, which is used for solving the problems of large signaling consumption and resource waste in the prior art.
In a first aspect, an embodiment of the present invention provides a punishment method after cell handover rejection, including:
receiving a measurement report sent by a user terminal, the measurement report including at least a target cell;
if the penalty timer corresponding to the target cell is in a closed state, sending a switching request to a target base station corresponding to the target cell so as to enable the target base station to perform resource preparation;
receiving a handover reply message sent by the target base station;
if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing the value of a rejection counter corresponding to the target cell;
and if the value of the rejection counter exceeds a preset rejection count threshold value, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter.
In a second aspect, an embodiment of the present invention further provides an electronic device, including:
a processor, a memory, a communication interface, and a bus; wherein the content of the first and second substances,
the processor, the memory and the communication interface complete mutual communication through the bus;
the communication interface is used for information transmission between communication devices of the electronic equipment;
the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform a method comprising:
receiving a measurement report sent by a user terminal, the measurement report including at least a target cell;
if the penalty timer corresponding to the target cell is in a closed state, sending a switching request to a target base station corresponding to the target cell so as to enable the target base station to perform resource preparation;
receiving a handover reply message sent by the target base station;
if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing the value of a rejection counter corresponding to the target cell;
and if the value of the rejection counter exceeds a preset rejection count threshold value, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter.
In a third aspect, an embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the following method:
receiving a measurement report sent by a user terminal, the measurement report including at least a target cell;
if the penalty timer corresponding to the target cell is in a closed state, sending a switching request to a target base station corresponding to the target cell so as to enable the target base station to perform resource preparation;
receiving a handover reply message sent by the target base station;
if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing the value of a rejection counter corresponding to the target cell;
and if the value of the rejection counter exceeds a preset rejection count threshold value, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter.
The punishment method after cell switching rejection provided by the embodiment of the invention sets the punishment timer corresponding to the target cell in the source cell, starts the punishment timer when the target cell is judged to be in a high telephone traffic scene, ignores all corresponding measurement reports and does not send a switching request to the target cell within the time period when the punishment timer is started, thereby improving the cell switching success rate of an LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Drawings
FIG. 1 is a flowchart illustrating a punishment method after cell handover rejection according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating another exemplary penalty method after cell handover rejection according to the present invention;
fig. 3 is a schematic structural diagram of a cell base station for a penalty method after cell handover rejection according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of a punishment method after cell handover rejection according to an embodiment of the present invention, and as shown in fig. 1, the method includes:
step S01, receiving a measurement report sent by the user equipment, where the measurement report at least includes the target cell.
In order to ensure the continuity and the service quality of the communication of the user terminal, the cell in which the user terminal is located, namely the source cell, the corresponding source base station sends the measurement task contained in the RRC reconfiguration message to the user terminal according to the needs of the corresponding source base station, so that the user terminal sends a measurement report to the source base station according to the measurement reporting standard in the measurement task in the monitoring process of the measurement object and under the condition that the measurement reporting standard is met. For example, a measurement task sent by a source base station to a user terminal is an event a2\ A3, where a2 indicates that reporting of a measurement report is triggered if RSRP of a corresponding reference signal of a cell where the user terminal is located is measured to be less than a preset power threshold, and A3 indicates that reporting of a measurement report is triggered if RSRP of other cells measured by the user terminal is higher than a preset difference threshold compared with RSRP of the cell where the user terminal is located.
When the user terminal sends a measurement report meeting the cell switching condition to the source base station according to the received measurement task, the measurement report at least comprises a target cell.
Step S02, if the penalty timer corresponding to the target cell is in an off state, sending a handover request to the target base station corresponding to the target cell, so that the target base station performs resource preparation.
After receiving a measurement report sent by any user terminal from a source cell, the source base station judges whether the measurement report meets cell switching conditions according to the content in the measurement report, if so, the source base station starts to execute a cell switching process, and the user terminal is switched from the source cell to a target cell through the cell switching process.
In order to prevent the target cell from being in a high traffic scene at this time, for example, and the handover process cannot be realized within a period of time, the source base station sets a penalty timer uniquely corresponding to the target cell, and starts the penalty timer and starts timing when the source base station determines that the target cell is in the high traffic scene.
And after the measurement report received by the source base station, the state of a penalty timer corresponding to the target cell is detected. If the punishment timer is in an open state, the source base station directly ignores the condition meeting the cell switching in the measurement report and does not execute the cell switching process; and if the penalty timer is in a closed state, the source base station sends a switching request to the target base station corresponding to the target cell. For example, if the penalty timer corresponding to the target cell C1 is PT1, the source bs S0 determines whether to send a handover request to the target bs S1 corresponding to C1 by checking the state of PT1 when the target cell obtained from the measurement report sent by the ue UeA is C1.
If the target cell corresponds to the source cell and is the same base station, namely the source base station and the target base station are the same base station, the subsequent cell switching process is intra-station switching; otherwise, if the source base station and the target base station are not the same base station, the subsequent cell switching process is inter-station switching. For convenience of description, in the following embodiments, the source base station and the target base station are still described by taking the base stations corresponding to the source cell and the target cell as examples.
After receiving the handover request, the target base station performs a resource preparation process, specifically, needs to prepare corresponding resources for the ue requesting handover in the network of the target cell.
And step S03, receiving the switching reply message sent by the target base station.
The target base station determines whether to allow the switching request of the user terminal according to the condition of the target base station in the resource preparation process, and then sends a switching reply message to the source base station. If the switching is agreed, the switching reply message is an admission message, otherwise, the switching reply message is a rejection message, and the rejection message contains a specific rejection reason. The reject reason can be divided into a resource type and a non-resource type, so that the reject message can also be divided into a resource type reject message and a non-resource type reject message. The reject reason of the resource class indicates that the resource in the current target cell cannot satisfy the handover request, for example, the reject message includes information such as No Radio Resources available in target cell, Transport Resources unavailable, Not edge User Plane Processing Resources, Radio Resources Not available, and Control Processing Overload.
Step S04, if it is determined that the handover reply message is a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing a value of a rejection counter corresponding to the target cell.
And if the source base station analyzes the received switching reply message, judging that the switching reply message is a resource type rejection message. It is detected whether a rejection timer corresponding to the target cell is in an on state, and if the rejection timer is in the on state, it may be determined that a rejection counter corresponding to the target cell is also in the on state and is counting, and a value of the rejection counter may be incremented by 1.
Further, the method further comprises:
and if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in a closed state, starting the rejection timer and starting timing.
If the source base station detects that the rejection timer corresponding to the target cell is in a closed state after receiving the resource type rejection message sent by the target base station, starting the rejection timer and starting timing, and starting the rejection counter to start counting.
Step S05, if it is determined that the value of the rejection counter exceeds a preset rejection count threshold, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter.
The source base station monitors the value of the rejection counter in real time and compares it with a preset rejection count threshold, e.g. 5, after each increment. If the value of the rejection counter exceeds the rejection count threshold at this time, and because the rejection timer is still in an open state at this time, that is, the time of the current rejection timer does not reach a preset rejection time threshold, for example, 15 minutes, it may be determined that the target cell is in a situation of, for example, a high traffic scene, and a penalty timer corresponding to the target cell needs to be started. While closing the rejection timer and resetting the value of the rejection counter.
And if the target cell contained in the measurement report corresponds to the started penalty timer, not initiating the cell switching process.
The embodiment of the invention sets the punishment timer corresponding to the target cell in the source cell, starts the punishment timer when judging that the target cell is in a high telephone traffic scene, ignores all corresponding measurement reports within the time period of starting the punishment timer and does not send the switching request to the target cell, thereby improving the cell switching success rate of the LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Based on the above embodiment, further, the method further includes
Monitoring the rejection timer in real time;
and if the time of the rejection timer reaches or exceeds a preset rejection time threshold, closing the rejection timer and resetting a rejection counter corresponding to the rejection timer.
After the rejection timer and the rejection counter are started, the source base station monitors the rejection timer and the rejection counter in real time. As described above, if the value of the rejection counter exceeds the rejection count threshold and the time of the rejection timer does not reach or exceeds the rejection time threshold, the source base station starts the corresponding penalty timer, closes the rejection timer, and resets the rejection counter. And if the rejection timer reaches the rejection time threshold before the rejection counter exceeds the rejection count threshold, determining that the corresponding target cell has no high traffic scene, closing the rejection timer, and resetting the rejection counter.
The embodiment of the invention sets a punishment timer corresponding to the target cell in the source cell, starts the punishment timer when the target cell is judged to be in a high telephone traffic scene through monitoring the rejection timer and the rejection counter, ignores all corresponding measurement reports and does not send a switching request to the target cell within the time period of starting the punishment timer, thereby improving the cell switching success rate of the LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Further, the method further comprises:
monitoring the penalty timer in real time;
and if the time of the penalty timer reaches or exceeds a preset penalty time threshold, closing the penalty timer.
And when the target cell is judged to be in a high telephone traffic state, the source base station starts a punishment timer corresponding to the target cell.
The source base station monitors the started punishment timer in real time, compares the time of the punishment timer with a preset punishment time threshold, for example, 10 minutes, and when the time of the punishment timer reaches or exceeds the punishment time threshold, the source base station closes the punishment timer, namely, the punishment time is over. In this case, when receiving the measurement report corresponding to the target cell, the source base station may start performing a cell handover procedure according to the measurement report, and send a handover request to the target cell.
The embodiment of the invention sets a punishment timer corresponding to the target cell in the source cell, starts the punishment timer when judging that the target cell is in a high telephone traffic scene, ignores all corresponding measurement reports within the starting time period of the punishment timer, does not send a switching request to the target cell, simultaneously monitors the punishment timer, and closes the punishment timer when the time of the punishment timer reaches a punishment time threshold value, thereby improving the cell switching success rate of an LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Based on the above embodiment, further, if the time of the penalty timer reaches or exceeds a preset penalty time threshold, the penalty timer is closed, specifically:
if the time of the punishment timer reaches or exceeds a preset punishment time threshold, closing the punishment timer and starting a check timer corresponding to the target cell; accordingly, the method further comprises:
if the switching reply message is judged to be a resource type rejection message and the checking timer corresponding to the target cell is in an open state, closing the checking timer, simultaneously opening a punishment timer corresponding to the target cell and simultaneously increasing the punishment time threshold.
If the target cell is in a high traffic scene for a long time, even if a penalty time threshold value is passed, the target cell still has no resource meeting the switching condition to receive the user terminal. In order to further save signaling consumption, a check timer corresponding to the target cell may be started while the penalty timer reaches or exceeds the penalty time threshold and is closed.
At this time, due to the closed penalty timer, when the source base station receives the measurement report including the target cell, it will start to perform a cell handover procedure, send a handover request to the target base station, and then receive a corresponding handover reply message sent by the target base station.
If the resource type rejection message from the target cell is not received before the time for checking the timer reaches a preset checking time threshold value, for example, 1 minute, it is determined that the target cell is no longer in the high traffic scene, and the checking timer is closed when the time for checking the timer reaches the checking time threshold value.
And if the time of the checking timer reaches the preset checking time threshold, receiving a resource type rejection message from the target cell, namely when the source base station judges that the received switching reply message is the resource type rejection message, if the checking timer corresponding to the target cell is in an open state, closing the checking timer, and simultaneously directly opening a corresponding punishment timer. At this time, the source base station may further update the check time threshold, that is, increase the check time threshold, for example, by 2 minutes, from the original 10 minutes to 12 minutes, so as to increase the starting duration of the penalty timer this time.
The embodiment of the invention sets a punishment timer corresponding to the target cell in the source cell, starts the punishment timer when judging that the target cell is in a high telephone traffic scene, ignores all corresponding measurement reports within the starting time period of the punishment timer, does not send a switching request to the target cell, starts the check timer when the punishment timer reaches a punishment time threshold value, judges that the target cell is still in the high telephone traffic scene, and directly starts the punishment timer, thereby improving the cell switching success rate of an LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Based on the above embodiment, further, the method further includes:
if the switching reply message is judged to be an admission message;
if the rejection timer is in an open state, closing the rejection timer and resetting the rejection counter;
and if the checking timer is in an open state, closing the checking timer and resetting the punishment time threshold.
By analyzing the handover reply message received by the source base station and sent by the target base station, if the handover reply message is determined to be an admission message, the target cell already prepares enough resources to admit the corresponding user terminal. The source base station closes the related timer which is still opened in the above embodiment, wherein if the rejection timer and the rejection counter are in an open state, the rejection timer and the rejection counter are closed, and the value of the rejection counter is reset; and if the checking timer is in an open state, closing the checking timer, and resetting the punishment time threshold value to be a preset initial value. Meanwhile, the source base station will continue to perform the subsequent steps of the cell handover process, which is not described in detail herein.
In the embodiment of the invention, the punishment timer corresponding to the target cell is arranged in the source cell, and when judging whether the target cell is in a high telephone traffic scene or not, if the admission message is received, the corresponding timer and the counter which are started at the moment are closed, and if the target cell is finally judged to be in the high telephone traffic scene, the punishment timer is started, and all corresponding measurement reports are ignored within the starting time period of the punishment timer and no switching request is sent to the target cell, so that the cell switching success rate of an LTE system is improved, a large amount of signaling consumption is saved, and the use efficiency of resources is improved.
Based on the foregoing embodiment, further, if the penalty timer corresponding to the target cell is in an off state, sending a handover request to the target base station corresponding to the target cell, so that the target base station performs resource preparation, specifically:
if the penalty timer corresponding to the target cell is in a closed state, and the terminal penalty timer and the terminal penalty counter are in a closed state, sending a switching request to a target base station corresponding to the target cell so as to prepare resources for the target base station; and the terminal punishment timer and the terminal punishment counter are respectively and uniquely corresponding to the user terminal and the target cell.
The source base station can set a terminal punishment timer and a terminal punishment counter corresponding to each user terminal and the target cell besides the punishment timer corresponding to the target cell.
If a measurement report containing the same target cell sent by the same user terminal is received, the measurement report is ignored to meet the cell switching condition, and a switching request is not sent to the target base station of the target cell. For example, setting the penalty timer corresponding to the target cell C1 to be PT1, and the terminal penalty timers corresponding to the ue UeA and the target cell C1 to be OT1, if the PT1 is turned on, if the target cell included in the measurement report sent by any ue, UeB or UeC is C1, disregarding that the measurement report satisfies the cell handover condition, and not executing the corresponding cell handover procedure; if it is OT1, the source bs only disregards the measurement report containing C1 sent by UeA, and the measurement reports containing C1 sent by UeB and UeC still send a handover request to the target bs S1 corresponding to C1.
Further, the method further comprises:
and if the switching reply message is judged to be a non-resource type rejection message, starting the terminal punishment counter.
And judging the received switching reply message as a non-resource-class rejection message according to the starting condition of the terminal punishment counter.
If the terminal penalty counter OC1 corresponds to UeA and C1, when OC1 is turned on, if a measurement report including C1 sent by UeA is received, disregard is made, and 1 is added to the terminal penalty counter until the terminal penalty counter reaches a preset terminal penalty count threshold, for example, 60 times, and the terminal penalty counter is turned off. The terminal penalty timer is the same as the terminal penalty timer, and the terminal penalty timer also can not punish the measurement report sent by other user terminals.
When the source base station receives the measurement report, the judgment sequence of the corresponding penalty timer, the terminal penalty timer and the terminal penalty counter can be set according to actual needs, and no specific limitation is made here. For example, whether a corresponding penalty timer is started or not may be monitored, and if not, whether the terminal penalty timer is started or not may be judged; or monitoring whether the corresponding terminal punishment timer is started or not, and judging whether the corresponding punishment timer is started or not if the terminal punishment timer is in a closed state. Of course, it may be set that the terminal penalty timer and/or the terminal penalty counter is directly turned off when the penalty timer is turned on.
The embodiment of the invention sets a punishment timer corresponding to the target cell in the source cell, starts the punishment timer when judging that the target cell is in a high telephone traffic scene, ignores all corresponding measurement reports within the time period of starting the punishment timer, does not send a switching request to the target cell, and sets a terminal punishment timer and a terminal punishment counter corresponding to the user terminal and the target cell to punishment the measurement reports containing the same target cell sent by the same terminal, thereby improving the cell switching success rate of the LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Fig. 2 is a flowchart of another punishment method after cell handover rejection according to an embodiment of the present invention, and as shown in fig. 2, an embodiment of the present invention provides a specific embodiment:
when the source bs S0 receives the measurement report sent by the ue UeA, it determines that the measurement report satisfies the cell handover condition and the handover target is the target cell C1 according to the analysis of the measurement report. Then check the status of the penalty timer PT1 corresponding to the target cell C1, and if the status is off, send a handover request to the target bs S1 corresponding to the target cell C1, so that the target bs S1 performs resource preparation and replies a handover reply message.
If the source bs S0 determines that the reply message is an admission message after parsing the received handover reply message, the cell handover procedure may be continued to handover the ue UeA from the source cell C0 to the target cell C1. And if the resource type rejection message is the rejection message, continuously judging whether the rejection message is the resource type rejection message.
If the handover reply message is determined to be a non-resource-class reject message, the terminal penalty counter OC1 corresponding to the ue UeA and the target cell C1 is turned on. If the source base station S0 receives any measurement report containing target cell C1 sent by UeA during the time period in which the terminal penalty counter is on, it is directly disregarded and the value of the terminal penalty counter OC1 is incremented by 1. The measurement report containing the target cell C1 sent by UeA is not processed until the value of the terminal penalty counter OC1 reaches a preset terminal penalty count threshold.
If the handover reply message is determined to be a resource class rejection message, the terminal penalty timer OT1 corresponding to the ue UeA and the target cell C1 is started. While detecting the state of the reject timer RT1 corresponding to the target cell C1. If the rejection timer OT1 is in an off state, the rejection timer RT1 and the corresponding rejection counter RC1 are started; if the reject timer RT1 is turned on, it may be determined that the corresponding reject counter RC1 is also turned on and is counting, and the value of the reject counter RC1 may be incremented by 1. When the reject timer RT1 is in the on state, after sending a handover request to the target cell C1 according to a measurement report of any ue, such as UeA, UeB, UeC, etc., the value of the corresponding reject counter RC1 is increased as long as it is a resource class reject message.
Like the terminal penalty counter OC1, when the terminal penalty timer OT1 is started, all measurement reports sent by UeA and including the target cell C1 are disregarded until the terminal penalty timer OT1 reaches a preset terminal penalty time threshold.
A reject timer RT1 and a reject counter RC1 that monitor the card-on status in real time. If the reject timer RT1 reaches the reject time threshold and the reject counter does not reach the reject count threshold, the reject timer RT1 and the reject counter RC1 are turned off. And if the rejection counter RC1 reaches the rejection count threshold and the rejection timer RT1 does not reach the rejection time threshold, the corresponding penalty timer PT1 needs to be started and monitored by the penalty timer PT1 while the rejection timer RT1 and the rejection counter RC1 are turned off.
During the time period when the penalty timer PT1 is on, any ue sending a measurement report containing the target cell C1 will be disregarded as meeting the cell handover condition. When the monitored time of the penalty timer PT1 reaches a preset penalty time threshold, the penalty timer PT1 can be closed, and a check timer CT1 uniquely corresponding to the target cell C1 needs to be started.
Similarly, the checking timer CT1 is monitored in real time, and if the resource class rejection message from the target cell C1 is not received when the time of the checking timer CT1 reaches the checking time threshold, the checking timer is only required to be closed; if the resource class rejection message from the target cell C1 is received, the check timer is closed, and the penalty timer needs to be started again, and the penalty time threshold is increased, that is, the penalty timer is longer in the quality-on state.
The embodiment of the invention sets the punishment timer corresponding to the target cell in the source cell, starts the punishment timer when judging that the target cell is in a high telephone traffic scene, ignores all corresponding measurement reports within the time period of starting the punishment timer and does not send the switching request to the target cell, thereby improving the cell switching success rate of the LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Fig. 3 is a schematic structural diagram of a cell base station for a penalty method after cell handover rejection according to an embodiment of the present invention, where as shown in fig. 3, the cell base station at least includes: the device comprises a receiving module 10, a sending module 11, a counting module 12 and a punishment module 13; wherein the content of the first and second substances,
the receiving module 10 is configured to receive a measurement report sent by a user equipment, where the measurement report at least includes a target cell; the sending module 11 is configured to send a handover request to a target base station corresponding to the target cell if the penalty timer corresponding to the target cell is in an off state, so that the target base station performs resource preparation; the receiving module 10 is further configured to receive a handover reply message sent by the target base station; the counting module 12 is configured to increase a value of a rejection counter corresponding to the target cell if it is determined that the handover reply message is a resource class rejection message and the rejection timer corresponding to the target cell is in an open state; the penalty module 13 is configured to start a penalty timer corresponding to the target cell, close the rejection timer, and reset the rejection counter if it is determined that the value of the rejection counter exceeds a preset rejection count threshold. Specifically, the method comprises the following steps:
the ue sends a measurement report satisfying the cell handover condition to the receiving module 10 according to the received measurement task sent by the sending module 11 of the cell base station, i.e. the source base station, where the measurement report at least includes the target cell.
After receiving a measurement report sent by any user terminal from a source cell, the receiving module 10 will determine whether the measurement report satisfies a cell handover condition according to the content in the measurement report, and if so, will notify the sending module 11 to start executing a cell handover process, that is, switch the user terminal from the source cell to a target cell through the cell handover process.
In order to prevent the target cell from being in a high traffic scene at this time, for example, and the handover process cannot be realized within a period of time, the penalty module 13 may set a penalty timer uniquely corresponding to the target cell, and when the penalty module 13 determines that the target cell is in the high traffic scene, the penalty timer is started and starts to count time.
After the measurement report received by the sending module 11, the penalty module 13 is first required to detect the state of the penalty timer corresponding to the target cell. If the penalty timer is in an on state, the sending module 11 will directly ignore the condition that the cell switching is satisfied in the measurement report, and will not execute the cell switching process; if the penalty timer is in an off state, the sending module 11 sends a handover request to the target base station corresponding to the target cell.
After receiving the handover request, the target base station performs a resource preparation process, specifically, needs to prepare corresponding resources for the ue requesting handover in the network of the target cell.
The target base station determines whether to allow the handover request of the ue according to its own condition during the resource preparation process, and then sends a handover reply message to the receiving module 10. If the switching is agreed, the switching reply message is an admission message, otherwise, the switching reply message is a rejection message, and the rejection message contains a specific rejection reason. The reject reason can be divided into a resource type and a non-resource type, so that the reject message can also be divided into a resource type reject message and a non-resource type reject message.
The receiving module 10 sends the received handover reply message to the counting module 12, and if the counting module 12 parses the received handover reply message, it determines that the handover reply message is a resource type rejection message. It is detected whether a rejection timer corresponding to the target cell is in an on state, and if the rejection timer is in the on state, it may be determined that a rejection counter corresponding to the target cell is also in the on state and is counting, and a value of the rejection counter may be incremented by 1.
Further, the method further comprises:
and if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in a closed state, starting the rejection timer and starting timing.
If the counting module 12 detects that the reject timer corresponding to the target cell is in the off state after receiving the resource class reject message sent by the target base station, the counting module 12 starts the reject timer and starts timing, and starts the reject counter to start counting.
The penalty module 13 may monitor the value of the rejection counter of the statistical module 12 in real time, and compare the value with a preset rejection count threshold after each increment. If the value of the rejection counter exceeds the rejection count threshold at this time, and because the rejection timer is still in an open state at this time, that is, the time of the current rejection timer does not reach the preset rejection time threshold, it may be determined that the target cell is in a situation such as a high traffic scene, and a penalty timer corresponding to the target cell needs to be started. While closing the rejection timer and resetting the value of the rejection counter.
To this end, in the time period when the penalty timer of the penalty module 13 is started, any ue received by the receiving module 10 sends a measurement report meeting the cell handover condition in the source cell, and if the target cell included in the measurement report corresponds to the started penalty timer, the sending module 11 does not initiate the cell handover process.
The cell base station provided in the embodiment of the present invention is configured to execute the method, and the functions of the cell base station specifically refer to the method embodiment, and the specific method flow is not described herein again.
In the embodiment of the invention, the punishment timer corresponding to the target cell is set in the punishment module 13, when the target cell is judged to be in a high telephone traffic scene, the punishment timer is started, and the corresponding measurement reports received by all the receiving modules 10 are ignored within the time period when the punishment timer is started, so that the sending module 11 does not send the switching request to the target cell, thereby improving the cell switching success rate of the LTE system, saving a large amount of signaling consumption and improving the use efficiency of resources.
Fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in fig. 4, the electronic device includes: a processor (processor)601, a memory (memory)602, and a bus 603;
wherein, the processor 601 and the memory 602 complete the communication with each other through the bus 603;
the processor 601 is configured to call program instructions in the memory 602 to perform the methods provided by the above-mentioned method embodiments, for example, including: receiving a measurement report sent by a user terminal, the measurement report including at least a target cell; if the penalty timer corresponding to the target cell is in a closed state, sending a switching request to a target base station corresponding to the target cell so as to enable the target base station to perform resource preparation; receiving a handover reply message sent by the target base station; if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing the value of a rejection counter corresponding to the target cell; and if the value of the rejection counter exceeds a preset rejection count threshold value, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter.
Further, embodiments of the present invention disclose a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, which when executed by a computer, the computer is capable of performing the methods provided by the above-mentioned method embodiments, for example, comprising: receiving a measurement report sent by a user terminal, the measurement report including at least a target cell; if the penalty timer corresponding to the target cell is in a closed state, sending a switching request to a target base station corresponding to the target cell so as to enable the target base station to perform resource preparation; receiving a handover reply message sent by the target base station; if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing the value of a rejection counter corresponding to the target cell; and if the value of the rejection counter exceeds a preset rejection count threshold value, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter.
Further, an embodiment of the present invention provides a non-transitory computer-readable storage medium storing computer instructions, which cause the computer to perform the method provided by the above method embodiments, for example, including: receiving a measurement report sent by a user terminal, the measurement report including at least a target cell; if the penalty timer corresponding to the target cell is in a closed state, sending a switching request to a target base station corresponding to the target cell so as to enable the target base station to perform resource preparation; receiving a handover reply message sent by the target base station; if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing the value of a rejection counter corresponding to the target cell; and if the value of the rejection counter exceeds a preset rejection count threshold value, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the electronic device and the like are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A punishment method after cell switching rejection is characterized by comprising the following steps:
receiving a measurement report sent by a user terminal, the measurement report including at least a target cell;
if the penalty timer corresponding to the target cell is in a closed state, sending a switching request to a target base station corresponding to the target cell so as to enable the target base station to perform resource preparation;
receiving a handover reply message sent by the target base station;
if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in an open state, increasing the value of a rejection counter corresponding to the target cell;
if the value of the rejection counter exceeds a preset rejection count threshold value, starting a penalty timer corresponding to the target cell, closing the rejection timer, and resetting the rejection counter;
if the punishment timer is in an open state, the source base station ignores the condition meeting the cell switching in the measurement report, and does not execute the cell switching process;
if the penalty timer is in a closed state, the source base station sends a switching request to a target base station corresponding to the target cell;
if the switching reply message is judged to be a resource type rejection message and the rejection timer corresponding to the target cell is in a closed state, starting the rejection timer and starting timing;
monitoring the rejection timer in real time;
and if the time of the rejection timer reaches or exceeds a preset rejection time threshold, closing the rejection timer and resetting a rejection counter corresponding to the rejection timer.
2. The method of claim 1, further comprising:
monitoring the penalty timer in real time;
and if the time of the penalty timer reaches or exceeds a preset penalty time threshold, closing the penalty timer.
3. The method according to claim 2, wherein if the time of the penalty timer reaches or exceeds a preset penalty time threshold, the penalty timer is closed, specifically:
if the time of the punishment timer reaches or exceeds a preset punishment time threshold, closing the punishment timer and starting a check timer corresponding to the target cell; accordingly, the method further comprises:
if the switching reply message is judged to be a resource type rejection message and the checking timer corresponding to the target cell is in an open state, closing the checking timer, simultaneously opening a punishment timer corresponding to the target cell and simultaneously increasing the punishment time threshold.
4. The method of claim 3, further comprising:
if the switching reply message is judged to be an admission message;
if the rejection timer is in an open state, closing the rejection timer and resetting the rejection counter;
and if the checking timer is in an open state, closing the checking timer and resetting the punishment time threshold.
5. The method according to claim 1, wherein if the penalty timer corresponding to the target cell is in an off state, sending a handover request to a target base station corresponding to the target cell to enable the target base station to perform resource preparation, specifically:
if the penalty timer corresponding to the target cell is in a closed state, and the terminal penalty timer and the terminal penalty counter are in a closed state, sending a switching request to a target base station corresponding to the target cell so as to prepare resources for the target base station; and the terminal punishment timer and the terminal punishment counter are respectively and uniquely corresponding to the user terminal and the target cell.
6. The method of claim 5, further comprising:
and if the switching reply message is judged to be a non-resource type rejection message, starting the terminal punishment counter.
7. An electronic device, comprising a memory and a processor, wherein the processor and the memory communicate with each other via a bus; the memory stores program instructions executable by the processor, the processor invoking the program instructions to perform the method of any of claims 1 to 6.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 1 to 6.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613233A (en) * | 2001-11-15 | 2005-05-04 | 艾利森电话股份有限公司 | Method and system of retransmission |
| CN101128057A (en) * | 2007-09-27 | 2008-02-20 | 中兴通讯股份有限公司 | Optimization method for base station switching |
| CN102196485A (en) * | 2010-03-09 | 2011-09-21 | 中兴通讯股份有限公司 | Method and system for reducing unnecessary switching in LTE (Long Term Evolution) system |
| WO2012003795A1 (en) * | 2010-07-06 | 2012-01-12 | 电信科学技术研究院 | Method and system for carrier frequency adjustment |
| CN102457939A (en) * | 2010-10-18 | 2012-05-16 | 宏碁股份有限公司 | Mobile communication apparatus, system thereof and connecting line establishing method |
| CN103415041A (en) * | 2013-07-19 | 2013-11-27 | 大唐移动通信设备有限公司 | Base station load balancing method and base station load balancing device |
| WO2014000650A1 (en) * | 2012-06-27 | 2014-01-03 | Mediatek Inc. | Enhancement procedure of suspending and resuming ue data in mobile communication networks |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8509791B2 (en) * | 2007-03-17 | 2013-08-13 | Qualcomm Incorporated | Handover in wireless communications |
| US9338704B2 (en) * | 2013-05-28 | 2016-05-10 | Rivada Networks, Llc | Methods and systems for intelligent selection of devices for handins |
-
2018
- 2018-03-09 CN CN201810195047.6A patent/CN110248388B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1613233A (en) * | 2001-11-15 | 2005-05-04 | 艾利森电话股份有限公司 | Method and system of retransmission |
| CN101128057A (en) * | 2007-09-27 | 2008-02-20 | 中兴通讯股份有限公司 | Optimization method for base station switching |
| CN102196485A (en) * | 2010-03-09 | 2011-09-21 | 中兴通讯股份有限公司 | Method and system for reducing unnecessary switching in LTE (Long Term Evolution) system |
| WO2012003795A1 (en) * | 2010-07-06 | 2012-01-12 | 电信科学技术研究院 | Method and system for carrier frequency adjustment |
| CN102457939A (en) * | 2010-10-18 | 2012-05-16 | 宏碁股份有限公司 | Mobile communication apparatus, system thereof and connecting line establishing method |
| WO2014000650A1 (en) * | 2012-06-27 | 2014-01-03 | Mediatek Inc. | Enhancement procedure of suspending and resuming ue data in mobile communication networks |
| CN103415041A (en) * | 2013-07-19 | 2013-11-27 | 大唐移动通信设备有限公司 | Base station load balancing method and base station load balancing device |
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