TR201904991T4 - Adaptation of transition parameters. - Google Patents

Abstract

This application is concerned with communication in general and more specifically, but not limited to improving communication performance by adapting the transition parameters.

Description

DESCRIPTION ADAPTATION OF PASS PARAMETERS BACKGROUND OF THE INVENTION Field of Invention This application relates to communication in general and more specifically, but is not limited to that. communication performance by adapting the transition parameters, including It's about increasing.

Entrance A wireless communication network provides various services to users in a specific geographical area. (e.g. voice, data, multimedia services, etc.) in order to provide was placed in the region. In a typical application, access points (for example, different corresponding to the cells) operates within the geographical region served by the network. provide wireless connectivity for access terminals (e.g., mobile phones) that display It is distributed throughout a network for the purpose of In general, at a given time, this access The access terminal will be serviced by a specific one of the points. Access While the terminal is traveling within this geographical area, the access terminal is can move away from the access point and further to another access point. may approach. In addition, signaling conditions within a particular cell may vary, which In this way, one access terminal can be better served by another access point. can be done. To preserve mobility for the access terminal in such cases terminal can be handed over from service access point to another access point.

Preferably, transition means no loss or disruption in the existing communication path. takes place without it. However, in practice, various transition errors occur. may come. Such faults include, for example, radio link faults (RLFs) and paging may include deductions. Some of these faults can be manually configured or It is related to incorrectly controlled transition parameters. These parameters are the most suitable If not configured accordingly, transition failures may occur. These problems are generally They can be considered in the categories d'ort: 1) transitions that occur very early; 2) too late transitions taking place; 3) transitions that are not properly triggered; and 4) access transitions that bounce back and forth between points (sometimes referred to as a “ping-pong game”) is named) In some views the explanation is transition parameter adaptation (e.g. optimization) It is related to. In some aspects of the description, access points in a system have their own Different schemes are described to facilitate the self-optimization function.

Here, the settings of the migration parameters are used to improve the migration performance in the system. automatically adapts to access points (e.g. to maximize) (i.e. without human intervention).

US 2005/221828 A1 describes a mobile station (MS) comprising a mobile station (MS) and at least two base stations (BS). Describes a method for distribution in a mobile communications system. A set in MS The handover threshold is the wireless connection between the MS and a first radio BS currently controlling the MS. It varies depending on the quality of the connection. Then, from the first BS to the second wireless The process for the transition of M82 to BS is carried out according to the transition threshold.

Huawei document: “Solutions for the Mobility Robustness use case”, 3GPP Draft; R3- 081165; RAN WG3, Kansas City, USA; 9 May 2008 (2008-05-09); cell pairs Regarding transitions that occur too early and/or too late between eNBrs explains the collection of meter information. This meter information, eNBs is reported to a central network organization and the organization in question is more then adjusts the migration parameters and reports these updated parameters. It sends it to the eNBs that provide it.

Huawei document: “RLF Analysis”; 3GPP Draft; R2-081697; RAN WGZ, Shenzhen, China; 25 March 2008 (2008-03-25), statistical analysis of radio link failure (RLF) information in the transition parameters of the source and/or target cells by analyzing Suggests a process for determining adjustments. RLF information is sent by UEs. are collected and sent to the network for analysis.

US 2003/119508 A1, consisting of identical or heterogeneous wireless access technologies to provide an adaptable IP handover triggering system for a wireless communications system It explains a method like. A mobile node is accessed by an existing access network. A minimum of access is informed about the pre-trigger parameter. At least one variable mobile node base on at least one pretrigger timing parameter whose transition threshold It was created with . The pilot beacon signal strength of the mobile node depends on the variable handover threshold. Once reached, an IP switch to a candidate access network is then initiated.

Samsung document: “Use case and requirement for Mobility Robustness Optimization”; 3GPP Draft; 85-082106; SA5, Miami, USA; 21 November 2008 (2008- 11-21) transfer of an RLF report from a target cell to a source cell Optimize the crossover parameters to minimize the RLF associated with the crossover based on explains approaches to do so.

DZET The present invention is defined in the independent claims. Example aspects of the specification A summary is as follows. In the discussion here, any reference to aspects of the term The citation may refer to one or more aspects of the statement. Attached claims Embodiments and/or examples of the following specification not covered by It is not considered a part of the present invention. For example, an access point can avoid transit-related failures and unnecessary migrations (e.g. optimization) by detecting incorrect or sub-optimal crossover parameter settings. can detect automatically. The access point then detects transit-related faults. and reduce inefficient use of network resources due to unnecessary transitions It can adapt the transition parameter settings for In this way, inappropriate transition Negativities in user experience caused by parameter settings (e.g. dropped calls, RLS, reduced data speeds, and inefficient use of network resources) can be reduced. Examples of adaptable switching parameters include trigger time (TTT) parameters, drift parameters and Cell Individual Shifts (CIO) is taking.

The specification is intended to identify different types of transition-related faults in some aspects and reagent determination to adapt the transition parameters in the light of the determinations It's about techniques. For example, an access point may fail after the switch is made too late. can detect a fault with the transition occurring and then detect such delays too late. It can adapt one or more transition parameters to prevent transitions. Another For example, an access point may be compromised as a result of a relay failure. can detect the resulting RLF and then set one or more pass parameters to that It can be adapted to prevent RLFs such as In addition, an access point Detect a fault related to the transition that occurred as a result of it being made too early and then to prevent such too early transitions, one or more can adapt the transition parameter. Also, an access point means that an access terminal a migration-related problem that occurs as a result of being delivered to the wrong cell. can detect the error and then prevent such transitions from being made to the wrong cell. It can adapt one or more transition parameters to prevent

The description is intended to provide information regarding access points in some respects. It's about messaging schemes. For example, if one access point is connected to another access point If it detects the RLF occurring at the access point, the access point It can send an RLF report to the In this way, the other access point reports to the RLF decide whether transition parameters need to be adjusted based on can give. As another example, if one access point is connected to another access point a fault for a switch caused by a switch (for example, a switch that is too early or an incorrect If it detects a pass to another access point, the access point sends a pass report to the other access point. can convey the message. In this case, the other access point is relayed based on the relay report. can decide whether the parameters need to be adjusted.

The current specification may, in some respects, lead to transitional failures. proactive detection techniques to identify situations and then use transition parameters This is about adaptation to prevent transition-related malfunctions. For example access relative signal reported by one or more access terminals can monitor its own power (its own power and that of surrounding access points) and whether there are very late transitions or very early transitions based on their strengths. determines whether it will happen. In this case, the access point may be blocked too late or too early. can adjust one or more crossover parameters to reduce crossovers.

In some respects, the specification is based on the visiting data stored by the access terminals in the system. by adapting migration parameters based on analysis of the obtained cell history It's about reducing ping-pong. For example, an access terminal, an access terminal When passed to an access point, the visited cell history is transferred to that access point. can send. The access point then analyzes the history of the visited cell (e.g. by determining the cells visited and the time spent in each cell) Can detect ping pong. Access point with detection of ping-pong To reduce the likelihood of such ping-ponging occurring in the future, one or more can adapt multiple transition parameters.

The explanation is that it is used to detect faults related to the transition in some aspects. It's about configuring parameters (e.g. timer values). For example a network management system can configure parameters for access points in a system and can send these parameters to access points. The access point is then parameters, transition-related errors such as transitions too early and transitions to the wrong cell. can be used to detect.

,BRIEF DESCRIPTION OF DRAWINGS These and other exemplary aspects of the disclosure are described in the detailed description and appended claims and It will be described in the attached figures, where: Figure 1 shows a communication adapted to achieve crossover parameter optimization. is a simplified block diagram of several sample aspects of the system; Figure 2: Detecting a very late migration error and resulting in a migration error. adapted to adapt its parameters to reduce very late transition failures is a simplified block diagram of several examples of a communication system; Figure 3: Detecting a migration error too early and resulting in a migration error. adapted to adapt its parameters to reduce too-early transition failures is a simplified block diagram of several examples of a communication system; Figure 4 shows how to detect the transition to the wrong cell and adjust the transition parameters accordingly. a communication tailored to reduce wrong-cell switching is a simplified block diagram of several examples of the system; Figure 5 is used to detect type one very late migration errors (e.g. a migration error) and Accordingly, the transition parameters are adjusted to reduce very late transition failures. is a flowchart of several examples of actions that can be taken to adapt; Figure 6 shows the second type of detection of very late migration errors and the resulting migration errors. to adapt its parameters to reduce very late transition failures. is a flowchart of several examples of operations that can be performed; Figure 7 shows the first type of detection of very early migration errors and the resulting migration errors. to adapt its parameters to reduce too-early transition failures. is a flowchart of several examples of operations that can be performed; Figure 8 shows the first type to detect very early migration errors and accordingly to adapt its parameters to reduce too-early transition failures. is a flowchart of several examples of operations that can be performed; Figures 9A and 98 are used to detect the second type of very early transition errors and thus to adapt the switching parameters to reduce errors of switching to the wrong cell. is a flowchart of several examples of operations that can be performed; Figure 10 shows a first type of detecting a switch to the wrong cell and corresponding switching. to adapt its parameters to reduce errors of switching to the wrong cell. is a flowchart of several examples of additional operations that can be performed; Figures 11A and 118 are used to detect and address the second type of wrong cell switching errors. depending on the transition parameters to reduce errors in switching to the wrong cell. is a flowchart of several examples of actions that can be taken to adapt; Figure 12 shows the steps that can be taken to proactively detect migration-related faults. is a flow chart of various sample aspects of operations; Figures 13A and 138 to proactively detect transition-related faults are simplified diagrams showing the signal quality indicators that can be used; Figure 14 shows various operations that can be performed to reduce ping-pong. is a flow chart of sample aspects; Figure 15 shows the steps that can be performed to configure the transition-related parameters. is a flow chart of various sample aspects of operations; Figure 16, handling malfunctions related to intra-access point and inter-access point switching is a flow chart of various exemplary aspects of operations that can be performed for; Figure 17 shows the steps that can be taken to address inter-access point switching related faults. is a flow chart of various sample aspects of operations; Figure 18 shows a few example aspects of components that can be used in communication nodes. is a simplified block diagram; Figure 19 is a simplified block diagram of several example aspects of communication components. is the diagram; And Figure 20-26, with transition parameter adaptation as taught here are simplified block diagrams of several sample aspects of the apparatus that may be used.

In accordance with common practice, various features shown in the drawings are cannot be reduced to scale. Accordingly, the dimensions of various features are used to provide clarity to the invention. It can be arbitrarily enlarged or reduced for any purpose. In addition, the drawings Some may be simplified for clarity of the invention. Therefore, drawings may not show all components of a given device (e.g. device) or method.

Finally, use similar to indicate similar features throughout the description and figures. Reference numbers may be used.

DETAILED EXPLANATION Various aspects of disclosure are described below. The teachings here are very diverse. any special structure, function or feature described herein that can be embodied in forms It should be clearly understood that both are representations only. What is taught here Based on this, a person skilled in the art would not believe that an aspect disclosed herein is that it can be applied independently of other aspects and that these aspects are combined into two or more He/she will appreciate that the excess can be combined in various ways. For example, here An apparatus can be realized using any of the directions mentioned, or a method can be applied. Additionally, such apparatus may be implemented or such method in addition to or without one or more of the aspects mentioned herein. using another, another structure, functionality or structure and functionality applicable. Additionally, an aspect may include at least one element in a claim.

Figure 1 shows several nodes of an exemplary communication system 100 (e.g. part of a communication network). In order to illustrate the invention, various aspects of the disclosure, one or more access terminals, access points, and networks that communicate with each other It will be described in the context of nodes. However, the teachings here are based on other terminology. other types of apparatus or other similar apparatus referenced using It will be appreciated that it may be applicable. For example, access in various applications base stations, eNodeBs, cells, etc. It may be named as or While it can be applied to access terminals, user equipment, mobile phones, etc. aspect can be named or applied.

Access points in the system 100 are for one or more wireless terminals. (e.g., access terminal 102), which can be installed on them or the system 100 One or more services that can roam throughout the coverage area (for example, network connection). For example, access at various points in time terminal (102) connects to an access point (104), an access point (106), or an access point It can be connected to point (108). Each of the access points (104 - 108) is a wide area network one or more network nodes to facilitate connection (for convenience It can communicate with the network node (represented by 110). These network nodes 'for example a or may take various forms, such as the presence of multiple radio and/or Core networks. This Therefore, in various applications, the network node (110) can be defined as at least one of the following: may represent functionality: network management (For example, an operation, administration, management, and through supply unit), call control, session management, mobility management, network gateway functions, interop functions, or some other suitable network functions.

Consistent with the teachings herein, access points (104, 106, and 108) are one or more access points used by access points during their operations. sequentially to achieve self-optimization of the parameter. The parameter includes optimization components (112, 114 and 116). this transition parameters, such as a trigger time (TTT) parameter, a serving cell an offset for, a Cell Individual Offset (ClO), a hysteresis parameter for an event and may contain a cell reselection parameter.

To ensure self-optimization of such transition parameters, access points can detect specific types of migration-related problems and then one or more to prevent related problems from occurring in the future. can adapt the transition parameter accordingly. For example, switching failures, too early transition triggering, very late transition triggering, non-triggered transitions, and wrong cell may occur as a result of transition. Here, the events occurring before the transition trigger Transitions that are not triggered due to RLF are a subset of very late transition triggers They can be considered as. In addition, an access terminal, each of the access terminal connects to the access point only for a relatively short period of time (ping-pong) If it repeatedly switches between access points (or cells), the system performance may be negatively affected. Therefore, in some aspects of the following specification transitions too late, transitions too early, transitions to the wrong cell, and ping-pong It aims to reduce the frequency of occurrence.

To make it easier to detect problems with this transition, access messages about crossing points (for example, as shown by the dashed lines in Figure 1) can receive from other nodes in the system (100). In more detail below As discussed, these messages are, for example, RLF report messages (for example, RLF indicator migration error-related messages and migration report messages (such as RLF event reports) may include ping-pong information messages such as messages. From these messages about the transition after getting one, an access point, problem with the switch mentioned above you can define one of its types and then use it to reduce that particular migration problem. can adapt a suitable transition parameter.

In some cases, an access point may use one or more buttons to detect a relay-related fault. will use more than one parameter. For example, an access point, an access terminal determine whether an RLF has occurred within a certain period of time after You can use a timer for . Effective detection of such events A network management system 118 may configure these parameters to facilitate and then send these parameters to access points (100) in the system.

With the above overview in mind, here are the transition parameters: Various techniques that can be used to adapt the teachings given are shown in Figure 2-17. will be described herein by reference. For illustration purposes, the flow in Figures 5-12 and 14-17 operations of the schemas (or other operations discussed or taught here) by components (for example, the components shown in Figures 1-4 or Figure 18) They can be described as realizable. However, other types of components of these operations It can also be realized by using a different number of components. It should be appreciated that it can be achieved. Additionally, one of the operations described here It should be appreciated that one or more of these may not be used in a particular application.

Figure 2-4 shows the messaging that can be used to diagnose a relay-related fault. shows. Figure 2 shows how to detect a very late transition. It shows the messaging that can be used to facilitate. Figure 3 is too early can be used to facilitate detection of a transition occurring. shows messaging. Figure 4: Detecting a switch to the wrong cell. It shows the messaging that can be used to facilitate communication.

Regarding the detection of migration that occurs too late in the beginning, if the access If the terminal's mobility is more aggressive than the pass parameter settings allow, switching can be triggered when the signal strength of the source is already too low - resulting in RLF It leads. Additionally, if an RLF is blocking the migration, the migration may not be triggered at all. This scenarios may be common in areas with high user mobility (e.g. along the highway, on a high-speed train, etc.).

In Figure 2, an access terminal (202), an access point (204) and an access It is near point (206). Initially, the access terminal 202 connects to the access point 204 is linked (e.g. a cell of access point 204). Here RLF, access Insufficient configuration of transition trigger parameters at point 204 may occur as a result (for example, as discussed above). Access point (206) signal quality provided by the access terminal 202 In cases where it is sufficient to maintain the access terminal (202), the access point 206 (e.g., in a cell of access point 206) may reestablish the connection.

In an example application, two types of very late transitions exist. The first type is very late in transition RLF, access point 204 receives a relay trigger measurement report from access terminal 202 It occurs before receiving the message. Therefore, in this case, any RLF is formed before starting the transition process. In a second late transition type, RLF The access point (204) triggers a relay from the access terminal (202) to the measurement report. After receiving the message, however, the access terminal (202) does not receive a pass through the access point (204). It occurs before receiving the command. Accordingly, in this case, access Even though point (204) has started the transition operations, RLF does not continue the transition operations. It occurs before completion.

Initially referring to the first type of very late transition, the access terminal 202 restart the connection at access point (204) after the RLF at access point (206) If set, access point 206 reports this RLF event via an RLF report message. It reports to the access point (204) (as represented by the dashed line in Figure 2).

In other words, the access terminal 202 is located after the RLF at the access point 204 re-establishes (or tries to re-establish) the radio connection at access point 206 tries), access point 206 reports this RLF event to access point 204.

Here, access point (206) is the previous serving cell/access point for the access terminal. identify the point (or possible candidates in case of identifier confusion) An identifier provided by the access terminal upon reconnection for (for example, physical cell identifier, PCI). Access points (204) more It can then detect many late passes based on this RLF report message. For example, access point 204 may match the correct context (a message contained in the RLF report message). based on the access terminal identifier) and before the rebuild request can analyze the possible root cause of incoming RLF.

The above operations are represented by the corresponding functional blocks in Figure 2. is done. Here, a component (208) of the access point (206) is detecting that the connection is re-established by the access terminal (202). It does. As a result of the connection being re-established, a report generator (210) The RLF sends the report message to access point 204. After receiving this message, A very late detector (212) allows the access terminal (202) to reach the access point in a short time. (206) detects that it has not been passed. That is, a very late transition has been detected. Conclusion Alternatively, a transition parameter adapter 214 is used based on detecting too late transition. It can adapt one or more transition parameters accordingly. More below As will be discussed in detail, adaptation of the transition parameters is one or more may be based on detection of multiple very late passages (e.g., same cell or access point or associated with different cells or access points).

The RLF report message indicates that the access point (204) has reached the access point of the access terminal (202). (206) provides various information to enable it to detect that it has not been passed in a short enough time. may include types. For example, the RLF report may include at least one of the following: access an identifier of the terminal, an identifier of the cell, and/or an identifier of the RLFt an identifier of the access point, an identifier of the cell, and/or the access an identifier of the access point to which the terminal is trying to reconnect, a geographical location of the RLF, the time when the RLFJ occurred, the type of report (e.g. too late transition), a frequency band in which RLFJ occurs, the access terminal A frequency band or transition parameter to which it is connected is of interest for optimization. other informations. The above identifiers, such as physical cell identifiers (PCIs), cell globular identifiers (CGls), MAC identifiers (e.g. a short MAC address), RNTIs for the access terminal, or some other appropriate identifier.

RLF events can be reported in a variety of ways. In some applications, RLF events are It is reported using based reporting. For example, when an RLF event An RLF event can be reported if it occurs. In some applications, RLF events occur periodically. It is reported as . Here, the reporting interval can be configured (e.g. a by the network management system). In some applications, RLF events are triggered on a demand basis. It is reported using reporting (e.g. query). For example, an access point may issue an RLF report in response to a request from another access point. can send. In some applications, RLF events may be subject to policy-based event reporting. It is reported using . For example, RLF events can be detected by a network operator. can be reported based on the provided configurable policy (for example, a through the operations and management (OAM) system).

In the example of Figure 27, the RLF report is sent between access points (i.e. a external to the access point). Here RLF report standardized protocols can be sent via external access point interfaces using For example, an LTE based system, the report is via an X2 interface using the X2-AP protocol (3GPP TS 36.423) and/or over an interface 81 using the S1-A protocol (specified in 3GPP TS 36.413*) can be sent.

In other cases, a cell sending an RLF event report and the RLF event report A cell to which it is sent can be viewed by the same access point. In these cases, RLF The event report can be sent internally to an access point (for example, by running its internal software).

Now regarding the second very late pass, while at access point 204, the regularly connected During mode measurements, the access terminal 202 sends a measurement report message Identifies a candidate access point that meets the criteria (e.g. request relay) (access point (206)). In this case, the access terminal (202) connects to the access point (204) It successfully sends a measurement report message. Access point (204) it then performs a handover preparation procedure (for example, an LTE-based in the system in accordance with TS 36.413 and 36.423). Therefore, access point 204 is A pass command is sent to the access terminal (202) requesting delivery to point (206). attempts to send. However, before receiving the handover command, the access terminal 202 either successfully executed on the relay command (for example, connect to access point 206). It experiences RLF at access point (204) before taking action as follows. (for example, connect to access point 206).

In this case, access point 204 can autonomously detect too late access. and/or access point (204) to an RLF report message received from access point (206) (e.g., type I described above for very late migration) in a similar way as above). In the previous case, an RLF detector component 216 is It can detect RLF with its terminal (202). For example, access point (204), access point RLF occurs while (204) is trying to transmit the switch command to the access terminal (202). can determine its arrival. In some aspects of the invention, the access point (204) is the access terminal It can detect RLF due to low level synchronization loss with (202).

Now, referring to Figure 3, it can be used with very early transition. 'exemplary' The messaging will be described. In some aspects of the invention, the access terminal, service an undesirable signal of another cell within the coverage area of a transmitting cell. A very early transition may be triggered when it enters the containment island. This is dense urban As in fields, the extent of fragmented cells is specific to the radiopropagation medium. This is a typical scenario for the areas where it occurs. A signature of very early transition, during transition RLF in the target cell and then establishment of reconnection in the source cell is to be done.

In Figure 3, an access terminal (302), an access point (304) and an access It is near point (306) as above. Access terminal (302) initially connects to access point 304 (e.g., a cell of access point 304) and then access point 306 (e.g., a cell of access point 306) is passed. However, RLF does not require access triggering parameters at the access point (304). as a result of its inadequate configuration, at the access point during migration. (306) or occurs immediately after the transition is completed. So, this is wrong Due to the transition parameter settings, the access terminal (302) connects to the access point (306). is passed too early (For example, access point 306 for access terminal 302 before determining the adequacy of the signal quality provided by the This is a RLF As a result, the access terminal (302) reconnects the connection at the access point (304). (for example, in a cell of the access point (304)).

In an example application, two types of very early transition are available. Type one is too early RLF in transit occurs before the access terminal (302) has successfully connected to the access point (306). occurs first (for example, transmits a transition confirmation message). A second type is too late RLF in transit occurs before the access terminal (302) has successfully connected to the access point (306). occurs after a short time.

Access point 304 can autonomously detect a first type of very early transition. This The operations are represented by the corresponding functional blocks in Figure 3. Here a component 308 of the access point 304, the access terminal of the connection due to RLF It detects its reconstruction by (302). This is reconnection As a result of creating a very early detector 310 access terminal It determines that (302) was passed to the access point (306) too early. So, it's too early A transition has been detected. As a result, a crossover parameter adapter 312 is very One or more transitions based on detection of early transition can adapt the parameter. As will be discussed in more detail below, adaptation of transition parameters to detect one or more very early transitions (e.g. same cell or access point or different cells or associated with access points).

Now, with reference to the second type of very early transition, the source and/or source for the transition is given. The target may use a timer to detect many such early transitions.

For example, the source is a relayed access terminal that, after completion of the relay, depending on whether it has re-established a connection with the source over a period of time It can detect many early transitions. Similarly, the target An RLF report regarding the RLF of the access terminal will be available after the handover is completed. very early, depending on whether it has been received by the target within a certain period of time. can detect the transition. These detection mechanisms, respectively, with reference to FIG. will be discussed.

Access point (304) transition from access point (304) to access point (306) When notified that it is complete, access point 304 starts a timer. (314) can start (t (early_HO_source) For example, completion of migration, access point 304 to release a user equipment (UE) context from the access point 306 can be specified when you receive the message. If the access terminal (302) sets the timer (314) to expire at access point before reaching (306) at access point after RLF (304) If it reestablishes the connection, the very early detector 310 detects a very early transition.

A transition parameter adapter 312 is then used to detect too early transition. It can adapt one or more transition parameters based on

In some cases, the source may choose not to notify the destination of the RLF event. However, other in cases (for example, where the resource does not use a timer and/or the UE context In applications where the UE deletes its content as a result of the broadcast message) the RLF event is sent to the source. an RLF to the source target because it may appear as a relay event that is too late for the target. Can send report message.

In this case, with reference to Figure 3.9, the access point (306) is separated from the access point (304). may start a timer 316 (term_Ho_hederi) when an incoming transition is completed.

For example, completing the handover may send a UE content broadcast message to the access point 304. The sending access point can be specified by (306). Before the timer (316) expires If an RLF report is received from access point 304 for access terminal 302, the access point (306) of this report access terminal (302) by access point (304) He decides that it shows that it was passed too early. In other words, access point (306) access point of this report is indicative of many late passes by (306) decides that it is not. As a result, access point 306 RLF may not affect the report, the access point (306) is a report generator (318) a pass to access point 304 to notify access point 304 of the early pass can send the report or both actions can be performed.

Thus, when access point 306 receives an RLF report from access point 304 and access point (306), for the same access terminal, within a certain period of time (terken_HO_target) access regarding the completion of a handover to the same access terminal If the UE sent the content broadcast message to the access point (304), the access point (306) It may indicate a very early transition to point (304). Receiving this message upon, the very early detector (310) is connected to the access point (306) of the access terminal (302). It determines that it was passed too early. In other words, a very early transition has been detected.

As a result, a crossover parameter adapter 312 may cause a crossover too early. adapt one or more transition parameters based on the detection edebmr The access report message indicates that the access point (304) has reached the access point of the access terminal (302). 306 may contain various types of information to enable it to detect that it has been passed too early.

For example, the access report might include at least one of the following: identifier, an identifier of the target (for example, an identifier of the cell and/or an identifier of the access point where the RLF occurs), an identifier of the resource (e.g. an identifier of the cell and/or reconnection of the access terminal an identifier of the access point it is trying to establish), the detected relay problem type of migration (e.g., too early migration), a reason for migration (e.g., during migration preparation referenced by the source) or of interest for crossover parameter optimization other informations. The above identifiers, such as physical cell identifiers (PCIs), cell globular identifiers (CGls), MAC identifiers (e.g. a short MAC address), RNTIs for the access terminal, or some other appropriate identifier.

Migration reports can be reported in various ways. In some applications, migration reports It is reported using event-based reporting. For example, a migration report The incident can be reported each time it occurs. In some applications, migration reports are reported periodically. Here, the reporting interval can be configured (for example, by a network management system). In some applications, migration reports may be requested. It is reported using based reporting (e.g. query). For example, a access point initiates a relay in response to a request from another access point. can send the report. In some applications, migration reports may include policy-based event reporting. It is reported using . For example, a migration report, a network operator can be reported based on configurable policy provided by (e.g., through an operations and management (OAM) system).

In the example of Figure 3, the access report is sent between access points (i.e. external to an access point). Here the transition report is standardized can be sent over external access point interfaces using protocols. For example, an X2 interface using the report X2-AP protocol in an LTE-based system over a network (specified in 3GPP TS 36.423) and/or using the Sl-A protocol It can be sent via the interface (specified in 3GPP TS 36.413).

In other cases, a cell that sends a relay report and the relay report A cell to which it is sent can be viewed by the same access point. In these cases, the transition report can be sent internally to an access point (for example, the access point by running the software).

Now, referring to Figure 4, once the switch to the wrong cell is detected, Example messaging that can be used will be described. some of the invention In the directions, if the transition parameters are set incorrectly, the transitions will occur incorrectly. They can be directed towards the cell. An example of the signature of a switch to a wrong cell, During the transition, an RLF is followed by another signal from the source cell or target cell. is the creation of a reconnection in a cell. For illustration purposes, the following discussion It will describe the transition between cells. However, the access points of the concepts explained It should be appreciated that it also applies to the transition between

In an example application, there are two types of transitions to the wrong cell. A type one mistake In the transition to the cell, RLF is activated before the access terminal (302) is successfully connected to the target cell. before it occurs in the source cell (for example, it transmits a pass confirmation message). One In the second type of switching to the wrong cell, RLF will successfully send the access terminal to the target cell. It occurs shortly after attachment.

Referring to the first type of transition at the beginning, starting from Figure 4, a time In the slot, the passage of an access terminal 402 is initiated from a source cell (For example, access point (404)). For example, access terminal 402 is disconnected from a cell source. He may have received a pass command. However, the access terminal (402) in the RLF source cell occurs before connecting to the target cell (e.g. access point (406)). is coming. In some embodiments, the connection may require successful completion of a relay verification message. It states that it is carried out in this way. As a result of RLF, access terminal 402 in a third cell that is neither a source cell nor a target cell (for example, an access point (408)) re-establishes the connection.

due to RLF by the access terminal 402 (e.g., one of the access point 408). component (410)) after detecting that the connection has been re-established, the third an RLF report message to the cell source cell (e.g. as discussed here) is sending. Upon receiving this message, the source cell (e.g. an incorrect cell) detector (412) determines that the access terminal (402) is switched to the wrong cell (e.g., The access terminal 402 is connected to a device that provides lower signal quality than the third cell. passed into the cell). In other words, a transition to the wrong cell has been detected. As a result, a transition parameter adapter (414) based on detecting the transition to the wrong cell It can adapt one or more transition parameters accordingly. It is discussed here adaptation of the transition parameters may prevent passage to one or more wrong cells. may be based on detection (for example, the same cell or access point or different associated with cells or access points).

Now, based on the second type of wrong cell switching, the RLF of the target access terminal An RLF report on the target within a certain period of time after the transition is completed. Depending on whether it has been received by the cell, it may detect a transfer to the wrong cell.

In some aspects of the invention, a signature of a miscellaneous migration may include: 1) migration is initiated from the source cell; 2) the access terminal is connected to the target cell; 3) RLF occurred in the target cell; and 4) access terminal, source cell or target It is reconnected in a third cell that is not a cell.

Referring to Figure 4, when an incoming relay from access point 404 is completed, The target cell may start a timer 416 (tstore_UE_content). For example, transition access point whose completion sends a UE content broadcast message to the access point 404. It can be specified with dot (406). If the target cell is related to this access terminal If the access terminal 402 receives an RLF report before the timer 416 expires, the target cell takes appropriate action depending on which cell sent the RLF report. will take it. If the RLF report is from a source cell (for example, access point (404)) received, the target cell acts as the RLF report as discussed here. may choose not to be present. On the other hand, the RLF report is sent to another cell from the source cell. received from a cell (e.g., from access point 408), the target cell (e.g., a report generator (418)) informs the source cell that the transition was made to the wrong cell. can send a migration report to the source cell to notify (e.g. here as described).

Therefore, in this last case, the target cell (e.g. access point 406) is receives an RLF indicator from the cell and the target cell comes to the same access terminal The UE context is released upon completion of a handover operation within a certain period of time. when it sends the release message to the source cell (for example, Idepo_UE_content seconds) sends a transition report message to the source cell indicating the transition event to the wrong cell. (e.g. access point (406)).

Upon receipt of this message, the wrong cell detector (412) is activated by the access terminal (402). It determines that it has been transferred to the wrong cell. This means that the transition to the wrong cell has been detected.

As a result, the transition parameter adapter (414) detects the transition to the wrong cell. It can adapt one or more transition parameters based on

The migration report message may contain similar information as discussed above. But this In this case, the type of detected migration problem reported by the report is placed in a wrong cell. There will be a transition. In addition, the report may contain an identifier of the wrong target (e.g., an identifier of the cell and/or an identifier of the access point where the RLF occurs identifier), an identifier of a correct target (for example, an identifier of the cell and/or one of the access point to which the access terminal is trying to re-establish the connection. identifier) and an identifier of the resource (for example, an identifier of the cell and/or an identifier of the access point that initiated the relay).

Shape. 5 - 11B describe sample processes that can be used for reagent detection (e.g. describes the algorithms). In some aspects of the invention, reagent detection utilizes prior methods. that may occur in the future based on reports and analysis of events It aims to prevent incidents. For illustration purposes, the following text cell It describes the processes and messaging between cells. As will be appreciated, this operations also operations of access points in general and access points It may correspond to the messaging between

The flow charts of Figure 5 and G are based on the detection of very late transitions. Describes the processes that can be used to adapt the parameters It does. Specifically, as discussed here in Figure 5, the first type is very late. The second type deals with very late transitions, as discussed here in Figure 6. It is relevant.

At some point in time, as represented by block 502 of Figure 5, a The access terminal is connected to a first cell (eg, a first access point).

While connected to the first cell, the access terminal sends a measurement report message to the first cell. It can identify a candidate cell (a second cell) that meets the criteria for sending.

As a result, the access terminal sends a measurement report message to the first cell. Might try to send it.

However, as represented by block 504, the access terminal does not send the measurement report message. in the first cell when attempting to send (or just before sending) RLF may survive. As discussed here, RLF is used in the first cell (e.g., first access point), which causes the access terminal not to be passed through, triggering a pass It may occur as a result of inadequate configuration of parameters.

As represented by block 506, the access terminal reconnects the connection in the second cell. It establishes. Here, the access terminal must reestablish the connection after RLF. selects the access point of the second cell (for example, the access terminal (based on the received signal strengths of the access points detected by

As discussed here, with the connection reestablished, the second cell (for example, the second access point) from the access terminal to the first receives a message indicating that the cell (for example, a primary access point) is experiencing RLF.

Here the message indicates the cell (and/or access point) where the RLFr occurred. determines.

As represented by block 508, the second cell (i.e. second access point) It sends an RLF report message to the first cell for its terminal. some of the invention directions, this message refers to the first cell (for example, the first access point) of the connection. informs that it has been re-established. As discussed here, this message for example, the identifier of a cell where the RLF occurred, where the connection was re-established. may include an identifier of the cell and an identifier of the access terminal. Moreover Again, as discussed above, this report message is event-driven, periodic, demand-driven, may be submitted according to policy-based reporting or other appropriate reporting schemes.

The first cell receives this report message as represented by block (510).

As represented by block 512, the first cell is based on the received RLF report message. It detects a very late transition fault. For example, the first cell displays the information in the report. can analyze and find that this is related to a very late transition from the first cell to the second cell. can be concluded. Therefore, in some aspects of the invention, detection of blog 512 is very difficult. may include detection of RLF due to late migration. In some aspects of the invention detection, first cell of the access terminal in a first cell (or access point). RLF before being passed from one cell to a second cell (or access point). This may include determining whether In some aspects of the invention, a first cell (or access point) a message from a second cell (or access point) receive, in which the message is an access that re-establishes a connection in the second cell. indicates that the terminal is experiencing RLF in the first cell, and that the access terminal Based on the message, it was not transferred to the second cell quickly enough. may include determining

As represented by block 514, the first cell is based on detecting a very late transition. It adapts one or more transition parameters. For example, first cell to avoid very late transitions to the second cell in the future. may take into account the information received in order to optimize its parameters.

As described here, adaptation of the transition parameters can be done by one or more can take into account the transition failure event. For example, a pass parameter is associated with that cell and/or or based on very late transitions detected in association with some other cell(s). can be adapted to a particular cell. Alternatively, a pass parameter, these cells and/or very late migration failures associated with some other cell(s) The array can be adapted for the cell.

Various types of transition parameters can be adapted here. For example, at least one: a trigger time (TTT) parameter, an offset for a serving cell, a Cell Individual Offset (CIO) or a hysteresis parameter for an event is too late can be adapted to reduce the likelihood of transitions occurring in the future (e.g. reduced).

Referring to the type 2 very late transition of Figure 6, the access terminal is connected to the first cell , a message that meets the criteria to send a measurement report message to the first cell. can detect a candidate cell (a second cell). In this case, the access terminal is the first It successfully sends the measurement report message to the cell. According to this, transition of the access terminal to the second cell, as represented by block 602 can be started. Here, the first cell connects to the access terminal requesting passage to the second cell. Attempts to send a switch command.

As represented by block 604, however, the access terminal cannot pass the pass command. before it can receive the access terminal or the access terminal has successfully received the pass command. access before it can execute (for example, successfully connects to the second cell). The terminal experiences RLK in the first cell. As discussed here, the KLF was the first from cell (e.g. first access point) to second cell (e.g. second access point) in the first cell causing the transition to be triggered too late for a successful transition. (e.g. first access point) insufficient access trigger parameters This may have occurred as a result of the configuration.

As represented by block 606, the first cell detects the RLF of the access terminal. It does. 'For example, detecting RLF while trying to transmit the first cell switch command and that this is a very late transition from the first cell to the second cell. can decide. As discussed here, in some cases detection of RLF is terminal from a first cell (or access point) to a second cell (or access point) during an ongoing migration procedure. may include detecting loss of substrate synchronization with the terminal. This Therefore, in some aspects of the invention, detection of block 606 is not possible due to very late migration. It may include detecting the RLFr, wherein the detection is detected in a first cell (or at the access point) where the access terminal moves from the first cell to a second cell (or access This may include determining that RLF has occurred during the transition to the

As represented by block 608, the access terminal reconnects the connection in the second cell. It establishes. As discussed here, with the connection reestablished, From the second cell access terminal, the access terminal is experiencing RLF in the first cell. You will receive a message stating:

As represented by block 610, the second cell provides a link to the first cell for this access terminal. RLF sends report message. As discussed above, this report message is appropriate It can be submitted according to any reporting scheme. The first cell contains this report message as represented by block (612).

As represented by block 614, the first cell is based on the received RLF report message. It detects a very late transition fault. For example, the first cell displays the information in the report. can analyze and find that this is related to a very late transition from the first cell to the second cell. can be concluded. Therefore, in some aspects of the invention, detection of blog 614 is very may include detection of RLF due to late migration. Here perception is a first in the cell (or access point) from a second cell (or access point) receive the message, which is a signal that re-establishes a connection in the second cell. indicates that the access terminal is experiencing RLF in the first cell, and the access terminal Based on the message received, it was not transferred to the second cell quickly enough. may include determining In addition, in some aspects of the invention, the access terminal detecting that the access terminal is not switched to the second cell early enough, RLF experience of the access terminal during the transition from the first cell to a second cell This may include determining whether or not.

As represented by block 616, the first cell is based on detecting a very late transition. It adapts one or more transition parameters. For example, first cell to avoid very late transitions to the second cell in the future. may take into account the information received in order to optimize its parameters.

Figure 7 - QB's flow charts based on detection of passes too early Describes the processes that can be used to adapt the parameters It does. As discussed here in Figure 7, the first type concerns very early transitions and The second type concerns very early transitions, as discussed here in Figure 8-98.

Referring to Figure 7*, when connected to the first cell, the access terminal to the second cell The transition is initiated as represented by block 702. This is the first example The cell sends a switch command to the access terminal requesting a switch to the second cell. It transmits successfully.

As represented by block 704, the access terminal attempts to connect to the second cell. While working, it experiences RLF in the second cell. As discussed here, RLF is the first from cell (e.g. first access point) to second cell (e.g. second access point) in the first cell causing the transition to be triggered too early for a successful transition. (e.g. first access point) insufficient access trigger parameters This may have occurred as a result of the configuration.

As represented by block 706, the access terminal reconnects the connection in the first cell. It establishes. As discussed here, with the connection reestablished, from the first cell access terminal, the access terminal is experiencing RLF in the second cell You will receive a message stating:

As represented by block 708, the first cell allows the connection to be reestablished. It detects too early switching fault based on For example, to another cell by the access terminal after a handover attempt in progress. Upon detecting that the connection has been reestablished, the first cell may conclude that type 1 is a very early transition case. Therefore, some of the invention In aspects, detection of block 708 prevents detection of RLF due to very early transition. wherein the detection occurs in a first cell (or access point), the first due to the early start of the transition of the access terminal from cell to second cell. In the second cell (or access point), reestablish a connection in the first cell. This may include determining whether an access terminal is experiencing RLF.

As represented by block (710), the first cell detects a very early transition error. It adapts one or more transition parameters based on

For example, the first cell is used to avoid too early transitions to the second cell in the future. may take into account the information received in order to optimize the transition parameters.

As discussed here, this includes, for example, adapting at least one of the following: may include (e.g. increment): a trigger time (TTT) parameter, a serving an offset for a cell, a Cell Individual Offset (CIO) or a hysteresis for an event parameter.

As described here, adaptation of the transition parameters can be done by one or more can take into account the transition failure event. For example, a pass parameter is defined as 0 cells and/or based on very early transitions detected in association with some other cell(s) can be adapted to a specific cell. Alternatively, a pass parameter, this based on very early migration errors associated with cells and/or some other cell(s) can be adapted for a range of cells.

Figure 87 is represented by block 802, with reference to type 2 very early transition operations. such as, the access terminal is successfully transferred from the first cell to the second cell. is passed. Here, the first cell indicates that the transition is completed. Once notified, it starts a timer (block 804). For example scheduler, when the first cell receives a UE context version message from the second cell can be started.

As represented by block 806, the access terminal experiences RLF in the second cell. (as discussed here, for example). As represented by block (808), access The terminal re-establishes the connection in the first cell. As discussed here, Upon re-establishing the connection, from the first cell access terminal, receives a message stating that the access terminal is experiencing RLF in the second cell.

As represented by block 810, the first cell allows the connection to be reestablished. It detects too early switching fault based on For example, if the connection If reestablishment occurs before the timer expires, The first cell may decide that this is a type 2 very early transition case. This Therefore, in some aspects of the invention, detection of block 810 is not possible due to too early transition. It may include detecting the RLF, wherein the detection is detected in a first cell (or at the access point), from the first cell to a second cell (or access point) A transferred access terminal is notified that the first cell handover has been completed. After being informed, the first cell will be reactivated within a certain period of time. This may include detecting connection establishment. As discussed here, some of the invention directions, the specified time period corresponds to a message received from a network management system. can be configured based on

As represented by block (812), the first cell detects the transition error too early. You can then change one or more transition parameters based on can adapt. In this case, various types of transition parameters can be adapted.

For example, at least one of the following: a trigger time (TTT) parameter, a serving an offset for a cell, a Cell Individual Offset (CIO) or a hysteresis for an event parameter to reduce the possibility of premature migrations in the future. can be increased.

As discussed above, in some cases, the first cell has access to the first cell. second as a result of the re-establishment of the connection by the terminal can send an RLF report message to the cell, whereupon the second cell Returns a transit report message to the cell. Figures 9A and 98, in this case It describes sample operations that can be performed.

As represented by block 902, the access terminal moves from the first cell to the second cell. is passed successfully. Here, after the second cell transition is completed then starts a timer (block 904). As represented by block (906), the access terminal experiences RLF in the second cell (e.g. like). As represented by block 908, the access terminal, as discussed herein, is It reestablishes the connection in the cell. As represented by block (910), the first The cell sends an RLF report message to the second cell. The second cell blocks this message It is taken as represented by (912).

As represented by block 914, the second cell expires before the timer expires. If the RLF receives the report message first (e.g. connection reestablished), the second cell It decides that this event is related to a second type of very early transition for the first cell.

As a result, the second cell sends a relay report to the first cell in block 916. sends the message and this message is sent by the first cell in the block (918). is taken. Therefore, in some aspects of the invention, the relay report message access RLF report message within a certain period of time after the terminal is passed It can be sent as a result of detection of receipt. As discussed here, the defined period is A data record of the access terminal is stored in the first cell (e.g. first access point). A message requesting deletion (for example, a UE context version message) It can start with sending. Additionally, the specified time period is a network management can be configured based on a message received from the system. As discussed here, this message may contain some type of relay error indicator associated with the RLF (for example, too early a transition indicator) In addition, this message 'For example, a cell containing RLF' identifier, an identifier of the cell to which the connection was re-established, and the access It may contain an identifier of the terminal.

As represented by block 920, the first cell is based on the received relay message. It detects very early transition failure. Therefore, some of the invention In the directions, detection of the block 920 prevents the detection of RLF due to very early switching. wherein the detection process occurs in a first cell (or access receiving a message from a second cell (or access point) may contain, where the message is the RLF reported by the first cell to the second cell, caused by the first cell passing its access terminal to the second cell too early states. The first cell transitions too early, as represented by block (922). one or more transition parameters based on the detection of the error. adapts.

Figure 10 - 11Brin flow diagrams based on detecting wrong cell transitions Describes the processes that can be used to adapt the transition parameters It does.

Figure 10 deals with the first type of transition to the wrong cell as discussed here and Figure 11A- 11B is related to the second type of migration to the wrong cell, as discussed here.

While connected to the first cell, as represented by block (1002), the access terminal's second The transition to the cell is initiated. For example, a switch to the first cell access terminal It can transmit the command message and store the access terminal content (UE content).

As represented by block 1004, the first access terminal is used during the handover procedure. experiences RLF in the cell (e.g. when attempting to connect to the second cell). while available). As discussed here, RLF is located in the first cell (i.e., first access point) is a migration trigger that causes the migration to be done to the wrong cell. It may occur as a result of inadequate configuration of parameters.

As represented by block 1006, the access terminal reconnects the connection in the third cell. It establishes. By reestablishing the connection, as discussed here connected, from the third cell access terminal to the second cell of the access terminal receives a message stating that there is RLF in the cell.

As represented by block 1008, the third cell sends an RLF report message to the first cell. and this message is received by the first cell in block (1010).

The first cell, as represented by block 1012, is based on the received RLF report message. type 1 switch to the wrong cell (for example, based on a received RLF indicator) detects the error. Here the first cell contains the identifier of the target RLF can compare it with the identifier of the cell (access point) from which the report was received. RLF The identifier of the cell (access point) from which the report is received, the source or destination If it is not identical to its identifier, the first cell transition is to a wrong cell. may conclude that it has been triggered correctly. Therefore, in some aspects of the invention, the blog (1012) detection in a first cell (or access point) in a second cell an access terminal that re-establishes a connection at the access point (or access point), due to a mistransition of the access terminal from the first cell to the third cell determine if a third cell (or access point) is experiencing an RLF. may contain.

As represented by block (1014), the first cell detects the switch to the wrong cell. Adapting one or more transition parameters in this way based on can. In this case, various types of transition parameters can be adapted. For example, A Cell Individual Shift (ClO) setting reduces the possibility of switching to the wrong cell in the future. can be adapted to reduce In addition, a trigger time (TTT) parameter, a shift for a serving cell or a hysteresis parameter for an activity Other parameters such as can be adapted here.

As described here, adaptation of the transition parameters can be done by one or more can take into account the transition failure event. For example, a cell with a specified pass parameter and/or based on the transition to the wrong cell detected in relation to other cells can be adapted for the specified cell. Alternatively, a pass parameter can be specified based on the transition to the wrong cell detected in relation to the cell and/or other cells It can be adapted for a set of cells specified as .

Now, with reference to the type 2 wrong cell transition operations of figure 11, with block (1102) As represented, the access terminal successfully moves from the first cell to the second cell. is passed. Here the second cell connects a UE to the first cell for the access terminal. The version sends the message and sets a timer represented by block (1104). (i.e. after the migration is completed). Blocks (1106 and 1108) As represented by , the access terminal experiences RLF in the second cell, where It reestablishes the connection in the third cell as discussed. With block (1110) As represented, the third cell sends an RLF report message to the second cell.

The second cell receives this message as represented by block (1112).

RLF before the timer expires, as represented by block (1114) If the report message is received, the second cell reports this event to the wrong cell with a type 2 for the first cell. determines that it is related to the transition event. For example, the second cell is the target cell (access point) identifier of the cell (access point) from which the RLF report is received can be compared with its identifier. The identifier of the cell from which the RLF report was received If the identifier of the source cell is 'identical', the second cell RLF may choose to ignore the report. On the other hand, the RLF report was received If the identifier of the cell is not the same as the identifier of the source cell, the second cell in block (1116) (including the switch to wrong cell indicator), to the source cell (first cell) sends a transit report message. This message is in block (1118) is taken up by the first cell. Therefore, in some aspects of the invention, transitional RLF within a certain period of time after the report message is passed to the access terminal The report can be sent as a result of determining that the message has been received. As discussed here, The defined time is for the access terminal in the first cell (e.g. first access point). of a message requesting Deletion of a data record (e.g. a UE context version It may start by sending the message. Additionally, the specified time period is a network management can be configured based on a message received from the system. As discussed here, This message may contain some type of relay error indicator associated with the RLF (for example, an incorrect cell transition indicator). In addition, this message can, for example, contain a RLF. an identifier of the cell, an identifier of the cell to which the connection was re-established, an identifier of the relay source cell and an identifier of the access terminal may contain.

As represented by block 1120, the first cell is based on the received relay message. It detects an error in switching to the wrong cell. Therefore, some of the invention directions, detecting the block 1120 from a second cell (or access point) may be based on a relay message received in the first cell (or access point), where the relay message reconnects a connection in a third cell (or access point). an access terminal that establishes an access terminal from the first cell to the second cell It shows that the second cell experiences RLF during a transition. Block (1122) As represented by, the first cell is based on detecting the switch to the wrong cell. It adapts one or more transition parameters.

Figure 12-138 to enable adaptation of proactive transition parameters Describes the techniques that can be used. In some aspects of the invention, proactive detection future events based on analysis of conditions before they occurred It aims to prevent possible incidents.

A cell (access point), as represented by blocks (1202 and 1204) in Figure 12, Measurement reports can be reported by any access terminal received by the cell. As mentioned, the signal quality of itself and other cells around it (e.g. signal strength). Figures 13A and 138, report for a serving cell (line Mn) and a target cell (line Ms), respectively It shows sample graphs of the quality indicators Qn and Qsr. this quality indicators, such as referenced signal quality (RSRQ), referenced signal may refer to power (RSRP) or other appropriate quality metrics.

Charts to determine when a metrics report should be triggered It illustrates the specific parameters that can be used. For example, slippage (e.g. hysteresis), the service of the target quality indicator before measurement reporting is triggered. It can show the amount that should exceed the cell indicator. In addition, triggering time (TTT) is the time when the above condition is continuously fulfilled before a measurement report is sent. It may indicate the minimum time required to be brought. In some cases, blocks (1202 and 1204) indicators when a measurement report is sent by an access report measurable.

As represented by block 1206, the cell is based on specified indications of signal quality. as a very late pass or a very early pass (e.g. a very late or very early pass) early transition signature). For example, a signature of the possibility of very late transition Whether the Qts are low and/or the measurement report is sent by the access terminal. the difference between the quality indicators (Ds-n) when sending compared to the offset depending on whether the difference is large or not (for example, the difference is exceeds a defined shift) can be defined. This situation is depicted in Figure 13. has been done. Conversely, a signature of the probability of switching too early is whether the Qts are low or not. and/or the difference between the measurement report quality indicators (Ds-n) is offset depending on whether it is small in comparison (e.g. the difference is a defined exceeds slip by less than a defined amount) can be defined. This situation is shown in Fig. It was depicted in 1138.

The cell then transitions or passes very late in the future, as represented by block (1208). One or more transitions, if applicable, to reduce the likelihood of too early transition can adapt its parameter (e.g. proactively checking too late or too early). reduce transitions). Therefore, in some aspects of the invention, a transition parameter, adaptable based on indicators specified in blocks 1202 and 1204 (for example, based on a difference between these indicators, a very late or very early based on transition signature etc). These parameters (for example, TTT, for a service cell a shift, ClO, a hysteresis parameter, or a combination of these) e.g. They can be adapted as discussed here.

Figure 14 shows the transition parameters based on the detection of ping-pong. It describes the processes that can be used to ensure adaptation. Here ping-pong avoidable transitions that occur between cells one after the other can be defined as . In some aspects of the invention, the detection of ping pong is exchange of access terminal specific information between cells may contain. This information includes, for example, the number of cells the access terminal has visited recently. IDs and extension time of the access terminal in each visited cell.

The access terminal is thus Can store visited cell history information. For example, a last visited cell For each cell visited in the list, the access terminal returns an identifier of the cell. (e.g. GCI), an indicator of the cell type and whether the access terminal remains in the cell. may contain an indication of the amount of time.

The access terminal then transfers this information to a cell, as represented by block 1404. It provides. For example, the access terminal sends this information along with the passage of the cell. can provide it to the cell. Cells in the system can then share this information. For example, in a relay request message containing a cell access terminal history information may send an information element (e.g. UE history information).

The cells are then based on historical information, as represented by block (1406). It can detect ping-pong. For example, each cell access terminal has two consecutive whether it is passed between cells and whether the access terminal is only available in each cell. Can query background information to determine if there was a short stay.

As represented by block 1408, if ping-pong is detected, a cell will be blocked in the future. To avoid this ping-pong, pass parameters (e.g. TTT, a a slip, CIO, a hysteresis parameter, or a combination thereof for the service cell. combination) can adapt one or more of them. For example, hysteresis is a Incorrect setting may result in ping-pong. Therefore, detecting ping-pong A hysteresis parameter is then introduced in an attempt to reduce ping-ponging. can be adapted.

In some aspects of the invention, an operator (e.g., through an OAM) provides network management Configure parameters based on policies and the operator's network information can. For example, a network operator may consider user mobility levels and models and their fluctuations, throughput performance and required grid resources Acceptance of desired trade-offs and transition parameters on load balancing can configure a parameter based on information about its possible impact.

As discussed above, relay-related parameters are affected by access point occurrences. (e.g. self-organizing network entities) automatically configurable. In addition, in some applications, valid parameters for these parameters access a set of values (e.g., range of values, enumerated values, etc.) points (e.g. by an operator). In such a situation, a The access point can select a value from a configured set of values (e.g. using pass parameter optimization algorithms as taught here).

In addition, parameters used to detect crossover failure can be configured. can be done. For example, the timer values described above (e.g. abandon_HO_source, abandoned_HO_hedefi, tdepolama_UE_ortami) can be configured by an operator (e.g. a (via OAM) and access points. In some applications, this means access a valid set of values from which points can choose a desired value may include provision.

In some applications, OAM allows you to send a parameter to all access points (or access points) in a network. cells) or depending on their location, migration patterns, load, source based on at least one of the availability, supplier, or some other factor or factors You can configure different values at different access points.

Figure 15 can be used to configure parameters for migration-related operations. describes the transactions. These operations may occur, for example, on one or more network nodes. or at some other suitable location (for example, at one or more access points) This can be accomplished by an implemented network management system (e.g. OAM). Block As represented by (1502), a network management system detects migration errors. It configures one or more parameters to increase and/or reduce

As discussed here, such a parameter may include, for example: an access by a cell to determine whether its terminal has been passed over too early. A parameter to be used is configured to reduce transitions that are too early a parameter, an access terminal in a source cell, an access terminal in a target cell. After being passed to the cell, you can reconnect a connection within a certain period of time. To be used by a source cell to determine whether it has established a parameter (e.g. a certain period of time) after the access terminal is passed to a target cell. then check whether an RLF report has been received for an access terminal for a certain period of time. a parameter (e.g., a certain period of time) to see if an access terminal has been switched to a wrong cell. a parameter to be used by a cell to determine the wrong cells a parameter configured to reduce throughput, or the access terminal target An RLF for an access terminal for a specified period of time after being passed into the cell used by a target cell to determine whether a report has been received a parameter (for example, a certain period of time).

As represented by block (1504), the network management system is configured parameters to one or more cells (or access points) in the network. is sending. As represented by block (1506), each cell (or access point) one or more of these parameters (e.g. transition parameters) can configure. As represented by block (1508), each cell (or access point) to detect and/or reduce transition errors as taught here. one or more parameters (e.g. timer values) can use.

Figure 16, wrong transition for intra access point migration and inter access point migration (HO) describes the operations that can be used with parameter determination. This 'in the example, one access point communicates with another access point via an X2-AP protocol module He is messaging with. In addition, RRC messages can be sent via an RRC module. is sent and received. In general, the operations shown are those described here. It is similar to the related operations. As a note, this example shows different aspects of the transit of an access point. how to simultaneously detect failure types and transition It shows how to adapt its parameters (via processing blocks).

Figure 17 with incorrect migration parameter detection for inter access point migration It describes the operations that can be used. In this example, an access point is an X2-AP It communicates with the other access point through the protocol module. In addition RRC messages are received through an RRC module. In general, shown The operations are similar to the corresponding operations described herein. As a note, this is an example access How to simultaneously detect different types of failures related to the crossing of the point? and how to adapt the transition parameters (process blocks shows through).

Figure 18 shows the transition parameter adaptation processes as described here. an access point (1802) to perform (For example, access points 104 - 108) and a network node 1804 (for example, corresponding to network management system 118 shows several example components that can be combined into nodes such as Specification The extracted components can also be included in other nodes in a communication system. For example, other nodes in a system may use access to provide similar functionality. may contain components similar to those described for point 1802. describe a specific knot It may contain one or more of the ingredients mentioned. For example, an access point The access terminal may operate on multiple frequencies and/or use different technologies. It may contain multiple transceiver components that allow it to communicate via

As shown in Figure 18, the access point 1802 is a device for communication with other nodes. May contain transceiver (1806). Transceiver 1806 to send signals (e.g. messages) a transmitter 1808 for receiving signals (e.g. messages) and a receiver 1810 for receiving signals (e.g. messages). Contains.

The access point (1802) and the network node (1804) are also referred to as one or another network node, respectively. It may include network interfaces (1812 and 1814) to communicate with the nodes.

For example, network interfaces (1812 and 1814) used a wired or wireless backhaul configured to communicate with one or more network nodes through can be done.

The access point (1802) and network node (1804) are also relayed as taught here. Other components that can be used with parameter adaptation processes Contains. For example, access point (1802) may display relay error related conditions (e.g. RLF due to too late transition, RLF due to too early transition, transition to wrong cell, etc.) a pass to detect and provide other related functions as described here May contain error detector (1816). Access point (1802), access related parameters a migration to adapt and provide other related functionalities as taught here The parameter may include adapter (1818). Access point (1802), parameters (e.g. specific period) and other related functionalities as taught here may include a parameter configurator 1820 to provide Access point (1802), determine the signal quality (e.g. a measure of the signal quality, the strength of the received signal, etc.). indicator) and a signal to provide other related functionalities as taught here May contain quality identifier (1822). In addition, network node (1804) parameters to send (for example, by means of a message or some other appropriate process); and a communications controller to provide other related functionalities as taught here (1824) may include. You can also configure network node (1804) parameters (e.g. to detect and/or reduce migration errors) and here A parameter configurator to provide other related functionality as taught (1826) may include.

For convenience, the access point (1802) and network node (1804) are here in Figure 18 It is shown to include components that can be used in the various examples described.

In practice, one or more of the illustrated components may be present in a given example. cannot be used. As an example, in some embodiments, the access point 104 is a signal may not contain the quality determinant (1822).

Additionally, in some applications, the components in Figure 18 may be installed in one or more processors. (for example, the information used by the processor(s) to provide this functionality or using and/or containing data memory to store code) may be implemented. For example, functionality of blocks (1816 - 1822) a processor or access point's processors and Can be implemented with the data memory of the access point. In addition, the blocks (1824 - 1826) functionality of a processor or processors of a network node and data of a network node Can be applied with memory.

In some aspects of the invention, the teachings herein are limited to macro-scale coverage (e.g., typical a large network such as a macrocell network or a 3G network called a WAN. area cellular network) and smaller scale coverage (e.g., typically called a LAN) in a network that includes a so-called residential-based or building-based network environment. can be used. As an access terminal (AT) moves through such a network, access while the terminal is protected in certain locations by access points that provide macro coverage. The access terminal is connected to other access points that provide coverage on a smaller scale. Can be served at locations. In some aspects of the invention, smaller coverage nodes with increasing capacity increase, indoor coverage and different services (e.g., for a smoother user experience).

A node that provides coverage over a relatively large area (for example, an access point) is called a macro node over a relatively small area. A node that provides coverage (for example, a residential building) is called a femto node. can be named. It will be appreciated that the teachings here do not cover other types of coverage. It can also be applied to nodes related to . For example, a pico node from a macro area coverage over an area smaller and larger than a femto field (for example, coverage inside a commercial building). In various applications, a reference macro node, a femto node, or other access point type nodes Other terminologies may also be used to obtain For example, a macro node is an access node, base station, access point, eNodeB, macro cell, etc. configured as can be defined or named. Also, a femto node is a Home NodeB, Home eNodeB, access point base station, femto cell etc. Can be configured as or can be named. In some applications, a node contains one or more cells. It may be related (e.g. divisible) to (e.g. sectors). One macro node, one femto A cell associated with a node or a pico node is called a macro cell, a It can be called a femto cell or a pico cell.

Access to a node may be restricted in some aspects of the invention. For example, a certain femto The node can only provide certain services to certain access terminals. Limited (or In distributions with (closed) access, a specific access terminal can only be accessed by a macro cell. mobile network and can receive service from a specific set of femto nodes (e.g., related femto nodes residing with user residence). In some applications a for at least one node, at least one of these (signaling, data access, recording, calls or service) may be limited.

In some aspects of the invention, a delimited femto node (also a Closed Subscriber) Group (may also be called Home NodeB) has access to a limited set of access terminals. It is a serving node. This set can be extended temporarily or permanently if necessary.

In some aspects of the invention, a Closed Subscriber Group (CSG) is a shared connection between access terminals. a set of access points (for example, femto nodes) that share an access control list can be defined as .

Therefore, there are various connections between a given femto node and a given access terminal. There may be relationships. For example, from the perspective of an access terminal, an open femto node may refer to a femto node with unrestricted access (e.g. femto node allows access to any access terminal). A constrained femto node, a femto that is restricted in some way (e.g., limited for access and/or recording) can represent the knot. A home femto node allows the access terminal to access and It can refer to a femto node that it is authorized to operate on (for example, a permanent access is provided to a specific set of further access terminals). One guest (or hybrid) femto node, temporary access of an access terminal or It can also refer to a femto node that is authorized to perform operations on it.

A foreign femto node cannot be accessed except in possible emergencies (e.g., 911 called). a femto node that the terminal is not authorized to access or operate on. can express.

From a limited femto node perspective, a home access terminal is a accessing a limited femto node installed at the residence of the owner of the access terminal It may refer to an authorized access terminal (usually a home access terminal). has permanent access to the femto node). A guest access terminal, restricted may refer to an access terminal with temporary access to the femto node (e.g., last based on date, lifetime, bytes, number of connections, or any other criterion or criteria as angry). A foreign access terminal, for emergencies such as 911 calls Except refers to an access terminal that is not allowed to access the restricted femto node. (for example, users who do not have authorization or permission to register with a restricted femto node an access terminal).

For convenience, the explanation here is in the context of a femto node for various explains the functions. But for wider coverage of a pico node It should be appreciated that it may provide the same or similar functionality. For example a pico node can be restricted, a home pico node can be used for a particular access terminal definable and so on.

The teachings in this specification do not include simultaneous communication for multiple wireless access terminals. It can be used in a wireless multi-access communications system that currently supports it. Here Each terminal is connected to one or more access points and forward and reverse connections. can communicate via messages. Forward link (or downlink), access It refers to the communication connection from points to terminals and is a back connection (or also uplink) refers to the communication link from terminals to access points It does. This communication link is a single-input, single-output system, a multi-input, multi-input system. It can be installed with a multi-output (MlMO) system or another type of system.

A MIMO system uses multiple (NT) transmit antennas and multiple (NR) receive antennas for data transmission. is using. A MlMO channel formed by NT transmitting and NR receiving antennas Ns, also called spatial channels, where NSSmin{NT,NR] can be divided into independent channels. Each of the ns independent channels corresponds to a dimension is coming. The MIMO system uses additional signal created by multiple transmit and receive antennas. This can provide improved performance if dimensions are used (e.g. higher efficiency and/or higher reliability).

A MIMO system includes time division duplex (TDD) and frequency division duplex. (FDD) can support. In a TDD system, forward and reverse link transmissions are on the same frequency. is in the region where the principle of reciprocity ensures that the forward link channel is connected to the backlink It allows prediction from the channel. This means there is more than one antenna on the access point. is present, the access point achieves beamforming gain on the forward link. enables it to do so.

Figure 19 shows a wireless device 1910 (e.g. an access point) and 'an example MIMO a wireless device 1950 (e.g., an access terminal) of the system 1900 It depicts. At the device 1910, a transfer (TX) data is sent from a data source 1912. Traffic data for a series of data streams is provided to the processor 1914. Every data stream It can then be transmitted via a corresponding transmission antenna.

TX data processor (1914) is a device selected for this data stream to provide encoded data. Formats, encodes and exports traffic data for each data stream based on custom coding scheme breaks. The coded data for each data stream is matched with pilot data using OFDM techniques. can be reproduced. Pilot data is typically processed in a known way and reflects the channel response. It is a known data pattern that can be used in the receiving system to make predictions. every data The multiplexed pilot and coded data for the stream are then used as modulation symbols. a specific modulation scheme chosen for this data stream (e.g. BPSK, QSPK, M-PSK or M-QAM) are modulated (i.e. coupled symbol). Data rate, coding and modulation for each data stream by a processor (1930) It can be determined by the instructions carried out by. A data memory processor (1932) (1930) or the program code used by other components of the device (1910), may store data and other information.

Modulation symbols for all data streams are then replaced by modulation symbols. A more capable TX MIMO processor (1920) (for OFDM, for example) is provided. TX MlMO processor (1920) later NT modulation symbol It provides streams from (1922T) directly to NT transceivers (XCVR) (1922A). meet up In some aspects, the TX MIMO processor (1920) has symbols for data streams and symbol It applies the shaping weights of the beam to the antenna to which it is transmitted.

Each transceiver (1922) has a corresponding device for providing one or more analog signals. receives and processes the symbol stream and also modulates it into a suitable format for transmission over the MIMO channel. Conditions (e.g. amplifies, filters) analog signals to provide the and raises). with NT module from (1922T) correct transceivers (1922A) The signals are then transmitted from (1924T) to the NT antennas (1924A) respectively. is being transferred.

In the device (1950), modulated signals transmitted via NR antennas (1952A to 1952R) and the signal received from each antenna (1952) is sent to a relevant transceiver. (XCVR) (1954A to 1954R) supplied. Each transceiver (1954) has a corresponding received signal conditions (e.g., filters, amplifies, and reduces) to provide samples digitizes the conditioned signal and provides a corresponding "received" symbol stream Processes the samples further for

A receive (RX) data processor (1960) then processed Nt “detected” symbol streams. received from NR transceivers based on a specific receiver processing technique to ensure NR receives and processes received symbol streams. RX data processor (1960) more then scan each detected symbol stream to recover traffic data for the data stream. demodulates, separates and solves. Implemented by RX data processor (1960) processing, TX MIMO processor (1920) and TX data processor (1914) in the device (1910) It is the complement of the operations performed by.

A processor (1970) periodically determines which precoding matrix to use. (discussed below). Islemci (1970) a matrix index part and It formulates a backlink message that includes a ranking value part. a data memory (1972) by the processor (1970) or other components of the device (1950) It can store used program code, data and other information.

The linkback message contains various information regarding the communication connection and/or the received data stream. may include types. Backlink message later, also from a data source (1936) modulated by a modulator (1980) which receives traffic data for multiple data streams received, conditioned by transceivers 1954A - 1954R and returned to device 1910 The transmitted TX is processed by a data processor (1938).

In the device (1910), modulated signals coming from the device (1950), antennas (1924) is received by, is conditioned by transceivers (1922), is a It is demodulated by the demodulator (DEMOD) (1940) and processed by the device (1950). by an RX data processor (1942) to extract the transmitted backlink message is being processed. Processor (1930) then used the beam to determine the forming weights. determines which precoding matrix to use and then outputs the It processes.

Figure 19 also shows communication components using access control procedures as taught here. It shows that it may contain one or more components that make the For example an access control component (1990) that controls another device (e.g., device (1950)) with the processor (1930) and/or other components of the device (1910) to can cooperate. Similarly, the access control component 1992 is connected to the device 1950. with other components of the processor (1970) and/or device (1950) to facilitate the transition He can cooperate. Two or more of the components described for each device (1910 and 1950) It should be appreciated that much of the functionality can be achieved with a single component. For example, A single processing component covers the functionality of the access control component (1990) and the processor (1930) and a single processing component, the access control component (1992) and the processor (1970) can provide its functionality.

The teachings herein are incorporated into various communication systems and/or system components. can be done. In some aspects of the invention, the teachings herein do not utilize existing system resources. A multimedia platform capable of supporting communication with multiple users by sharing can be used in the access system (for example, one or more bandwidth determining, transmitting power, coding, giving space, etc.). For example, the teachings here Applicable to any or combination of the following technologies: Code Segment Multiple Access (CDMA) systems, Multi-Carrier CDMA (MCCDMA), Wide Banded CDMA (W-CDMA), High Speed Packet Access (HSPA, HSPA+) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Single Carrier FDMA (SC-FDMA) systems, Orthogonal Frequency Segmented Multiple Access (OFDMA) systems or other multiple access techniques. here A wireless communication system using the teachings lS-95, cdma2000, IS-856, W-CDMA, For the implementation of one or more standards such as TDSCDMA and other standards devisable. A CDMA network, Universal Terrestrial Radio Access (UTRA), It may implement a radio technology such as cdma2000 or another technology. UTRA, W- Includes CDMA and Low Chip Rate (LCR). CdmaZOOO technology covers IS-2000, IS-95 and IS-856 standards. A TDMA network uses radio technology such as the Global System for Mobile Communications (GSM) can apply. An OFDMA network Evolved UTRA (E-UTRA), IEEE 802.11, IEEE 802.16, IEEE 802.20, Flash-OFDM®, etc. It can apply radio technology such as

UTRA, E-UTRA and GSM are part of the Universal Mobile Telecommunications System (UMTS). is part of it. The teachings here are on a 3 GPP Long Term Evolution (LTE) system, Ultra It can be applied in Mobile Broadband (UMB) system and other types of systems. LTE, E- It is a version of UMTS that uses UTRA. UTRA, E-UTRA, GSM, UMTS and LTE, “3. Generation While cdmaZOOO is described in the documents of an organization called "Partnership Project" (3GPP) “3. It is described in the documents of an organization called “Generation Partnership Project 2” (3GPP2).

Although some aspects of the disclosure can be described using SGPP terminology also 'the teachings herein are based on 3GPP (e.g. Rel99, Rel5, Rel6, Rel7) technology and as well as 3GPP2 (e.g., 1XRTT, 1XEV-DO Re10, RevA, RevB) technology and It should be understood that it can be applied to other technologies.

The tutorials here can be incorporated into various devices (e.g. nodes) (e.g. in can be applied or realized with it). In some aspects of the invention, wherein A node (for example, a wireless node), implemented in accordance with the doctrines, is an access may include a point or an access terminal. For example, an access terminal can be a user equipment, a subscriber station, a subscriber unit, a mobile station, a mobile, a mobile node, a remote station, a remote terminal, a user terminal, a user agent, a user device, or some It may contain other terms, be applied as, or be known as. Some In embodiments, an access terminal may include: a cellular phone, a wireless phone, a session initiation protocol (SlP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), a handheld device with wireless connectivity device or some other suitable processing device connected to the wireless modem.

Accordingly, one or more of the 'features' taught here are a telephone (for example, a mobile phone or smartphone), a computer (e.g. a laptop), a portable a communications device, a portable computing device (such as a personal data assistant), a entertainment device (for example, a music device, a video device or a satellite radio), communication via a global positioning system device or a wireless medium can be incorporated into another suitable device configured to install

An access point is a NodeB, an eNodeB, a radio network controller (RNC), a base station (BS), a radio base station (RBS), a base station controller (BSC), a base transceiver station (BTS), a transceiver function (TF), a radio transceiver, a radio router, a basic service set (BSS), an extended service set (ESS), one macro cell, one macro node, one Ev eNB (HeNB), one femto cell, one femto node, a pico node, or other similar terminology, as can be applied or known as such.

In some aspects of the invention, a node (e.g., an access point) for a communications system may contain an access node. Such an access node is, for example, a wired connection to the network. or via a wireless communication connection to a network (for example, the Internet or a A wide area network (such as a cellular network) can provide connectivity. Accordingly a access node connects another node (or an access terminal) to a network or It may allow you to access some other functions. In addition, from nodes one or both of which may be portable or, in some cases, relatively portable. It should be appreciated that this cannot happen.

Additionally, a wireless node can be connected in a non-wireless way (for example, a wired node). may have the ability to transmit and/or receive information (via connection) should be done. Therefore, a receiver and a transmitter are non-wireless as discussed here. communication interface components suitable for communicating through a medium (e.g., may contain electrical or optical interface components).

A wireless node is based on any suitable wireless communication technology or One or more wireless communications links that otherwise support You can communicate via . For example, in some aspects of the invention, a wireless node It may be connected to the network. In some aspects of the invention, the network is a local area network. or may include a wide area network. A wireless device can transmit various wireless communications technologies, protocols, or standards such as those discussed here, or can support several (e.g., CDMA, TDMA, OFDM, OFDMA, WiMAX, Wi-Fi, etc.) or otherwise he may use it. Similarly, a wireless node is connected to one or more can support a variety of suitable modulation or multiplexing schemes, or otherwise can use. A wireless node is connected to or from other wireless nodes. Establishing one or more wireless communication links using technologies and may include appropriate components (e.g., air interfaces) for communicating. For example, A wireless node consists of various devices that facilitate communication over a wireless medium. and associated transmitter, which may include components (for example, signal generators and signal processors) may include a wireless transceiver with receiving components.

The functionality described here (e.g. with one or more of the accompanying figures with respect to), means for the functionality similarly stated in the appended claims are some may correspond to different aspects. Referring to Figure 20-26, apparatus (2000, 2100, 2200, 2300, 2400, 2500 and 2600) are represented as a series of interrelated functional modules is done. Here a receiver module 2002 is, at least in some respects, e.g. It may correspond to a receiver as discussed here. A sending module (2004) at It may correspond, at least in some aspects, to a transmitter, such as the one discussed here.

A receiver module 2102 is, at least in some respects, a It may correspond to the buyer. A transmit module 2104, at least in some aspects, for example, it may correspond to a donor as discussed here. A configurator module (2106), at least in some respects, is a parameter such as discussed here may correspond to the configurator (e.g. parameter configurator (1820)). A lot The late transition error detection module 2202, in at least some aspects of the invention, For example, it may correspond to a transition error detector as discussed here. a transition parameter adaptation module 2204 at least in some aspects, e.g. here It may correspond to a transfer parameter adapter as discussed. One too soon The transition error detection module 2302 is used in at least some aspects of the invention, e.g. It may correspond to a transition error detector as discussed here. a transition parameter adaptation module 2304 at least in some aspects, e.g. here It may correspond to a transfer parameter adapter as discussed. Configure a The generating module 2306 is, at least in some respects, a versus parameter configurator (e.g. parameter configurator (1820)) may come. A wrong cell migration detection module 2402 provides at least some aspects, e.g. as opposed to a transition error detector as discussed here may come. Module 2404 for adapting a transition parameter at least some aspects, e.g. as opposed to a transfer parameter adapter as discussed here may come. An indicator of the signal quality determination module 2502 shall be at least In some aspects of the invention, for example, there is a signal quality determinant as discussed herein. It may correspond to the detector. The module 2504 for adapting a transition parameter is at a transfer parameter at least in some aspects, such as discussed here It may correspond to the adapter. A parameter configurator module 2602 is at least In some respects, for example, as discussed here, a parameter is given to the configurator. (e.g. parameter configurator (1824)). Sending a parameter module 2604 is a communications device, at least in some respects, such as discussed here. may correspond to the controller.

The functionality of the modules in Figure 20-26 can be varied in accordance with the teachings herein. can be applied by other means. In some aspects of the invention, the functionality of these modules is one or more Can be implemented as multiple electrical components. In some aspects of the invention, this The functionality of blocks is a processing system that includes one or more processor components. It can be applied as follows. In some aspects of the invention, the functionality of these modules for example, at least one part of one or more integrated circuits (e.g., an ASIC) It can be applied using . As discussed here, an integrated circuit is a processor, a The software may contain other components or a combination thereof. These modules The functionality can also be implemented in some other ways as taught here. meet up In some aspects, one or more of the dashed blocks in Figures 20-26 It is optional. ':5 SS' Any given to an element here that uses a designation such as “first, second” and so on a reference generally does not limit the amount or order of these elements must be understood. On the contrary, these definitions contain two or more elements. as a convenient method for distinguishing between 'instances' of an element. can be used. Therefore, a reference to the first and second elements is there where only two elements can be used or the first element somehow connects the second element It doesn't mean it has to pass. Also, unless stated otherwise, a series The element may contain one or more elements. In addition, in the specification or The terminology of the form "at least one of A, B or C" used in the claims means "A or B or C or any combination of these elements".

Experts in the technical field believe that information and signals can be obtained from a variety of different technologies and techniques. will understand that it can be represented using any of them. For example above data, instructions, commands, information that may be referenced throughout the description, signals, bits, symbols and chips voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles or their can be represented by any combination.

As technical experts will appreciate, with the aspects explained here various illustrative logical blocks, modules, processors, described in conjunction any of the tools, circuits, and algorithm steps used in electronic hardware (e.g., a digital application, an analog application, or source coding or other a combination of the two that may be devised using the technique), various instructions, or various forms of program or design code containing combinations of both (may be referred to here as "software" or "software mod'L'iI'L'i" for convenience) can be applied as. To clearly demonstrate this interchangeability of hardware and software, Above, in general terms, various illustrative components, blocks, Modules, circuits and steps are explained. This kind of functionality is not possible through hardware or whether it is implemented as software, specific application applied to the overall system, and depends on design constraints. Persons skilled in the art should use the described functionality, They may apply it in various ways for each specific application, but this type of application decisions as if they caused departure from the scope of this specification. should not be interpreted.

There are various explanatory logical arguments explained in connection with the aspects explained here. blocks, modules and circuits may be an integrated circuit (IC), an access terminal or a It can be implemented within or realized through the access point. IC here are designed to perform the functions described and can be used inside the IC, outside the IC or on any A general-purpose processor that can execute the codes or instructions contained in either of them. One digital signal processor (DSP), an application-specific integrated circuit (ASlC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, electrical components, optical components, mechanical components, or any combination thereof.

Although a general purpose processor can be a microprocessor, alternatively the processor can be any It can also be a traditional processor, controller, microcontroller or state machine.

A processor is a combination of computer devices, such as a DSP and a microprocessor, multiple microprocessors, one or more microprocessors together with a DSP core as a combination of multiple microprocessors or another such configuration applicable.

Any specific order or step in any process described It should be understood that the hierarchy is an exemplary example of an approach. Design preferences The specific order and hierarchy of steps in processes, based on can be rearranged to remain within the scope of the specification. must be understood. The accompanying method presents elements of the various steps in an exemplary order and is not limited to the particular order or hierarchy presented.

In one or more of the exemplary embodiments, the described functions are hardware, software, firmware or any of these Applicable to combination. If implemented in software, the functions are one or more instructions or instructions on computer-readable media. can be stored or transferred as code. computer-readable media, both computer storage media and the ability of a computer program to be stored from one place. communications media, which includes any medium that facilitates transmission to another location Contains. A storage medium is any storage medium that can be accessed by a computer. could be the environment. For example, but not limited to, computer-generated Such readable media contain the desired program code into instructions or data structures. format that can be used to transport or store and can be processed by a computer. accessible RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices or other May contain environments. Additionally, any connection should be properly connected to the computer. It is called a readable medium. For example, if the software is a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or a web using wireless technologies such as infrared, radio and microwave site, server or other remote source, then coaxial cable, fiber optic cable, twisted pair, DSL or infrared, radio and Wireless technologies such as microwaves are included in the definition of environment. Here disk and disk as used (while disks generally produce data magnetically, discs produce data optically with lasers) compact disc (CD), laser disc, optical disc, Includes digital versatile disc (DVD) and blue ray disc. of the above combinations are included in the scope of computer-readable media should be done. It will be appreciated that a computer-readable medium can be used in any suitable can be implemented in a computer program.

The foregoing description of the disclosed aspects is not intended by those skilled in the art to use this specification. It is provided to enable users to perform or use These views Various modifications that can be carried out are for those skilled in the art. will be easily understandable and the general principles described herein will be It can also be applied to other views without going beyond its scope.

Claims (15)

1. It is a communication method, and its feature is: to show that you have experienced the malfunction; It involves adapting (514, 616) at least one transition parameter in the first cell based on the detection by the first cell (104, 204) that, according to the received message, the access terminal (102, 202) is passed too late. 2. It is a method according to claim 1, its feature is; What occurs here is that the radio link access terminal (102, 202) involves detecting the loss of substrate synchronization with the access terminal (102, 202) during an ongoing handover operation. 3. It is a method according to claim 11 and its feature is; wherein the at least one transition parameter includes at least one of the group consisting of a trigger time parameter, a drift for a serving cell, a Cell Individual Shift, and a hysteresis parameter, wherein the drift exceeds a service cell indicator of a quality indicator before measurement reporting is triggered. It shows a required amount. 4. It is a method according to claim 1 and its feature is; wherein the adaptation of the at least one transition parameter includes at least one of the group consisting of reducing a trigger time parameter, reducing drift for a serving cell, reducing a Cell Individual Drift, and reducing a hysteresis parameter, wherein the adaptation of the at least one transition parameter includes at least one of the group consisting of reducing a drift for a serving cell, reducing a Cell Individual Drift, and reducing a hysteresis parameter, wherein the drift reduces the quality indicator to the service cell before the measurement reporting is triggered. It shows the amount that should exceed the indicator. 5. A device (104, 204) for communication, including means for 612), wherein the message indicates that an access terminal (102, 202) has experienced a radio link failure associated with the first cell (104, 204); means for detecting (512, 614) that the access terminal (102, 202) has been passed too late, based on the received message; and comprising means for adapting (514, 716) at least one transition parameter in the first cell (104, 204) based on the detection. 6. A computer program product, characterized in that: a computer-readable 612 containing code for a computer to do the following, wherein the message indicates an access that re-establishes a connection in the second cell 106, 206; According to the received message, at least one pass is made by the first cell (104, 204) based on the first cell's detection that the access terminal (102, 202) is passed too late. 7. A communication method, characterized by: indicating that it has received a radio link failure report from the first cell (104, 304) for an access terminal (102, 302) within a certain period of time after its completion, indicating that it has re-established a connection with it; detecting (708, 810, 920) that there is an access terminal based on the received message by the first cell (104, 304); and based on the detection, at least one transition parameter is entered in the first cell (104, 304). 8. It is a method according to claim 7, and its feature is; where detecting includes determining that an access terminal (102, 302) that reestablishes the connection in the first cell is experiencing radio link failure in a second cell (106, 306). 9. It is a method according to claim 7 and its feature is; wherein the detection includes detecting the re-establishment of a connection in the first cell (104, 304) within a certain time period, after being notified in a first cell (104). 10. A device (104, 304) for communication, comprising means for: wherein the message is transmitted from the second cell (106, 306) to the first cell (104, 104) within a certain period of time after its completion, to an access terminal (102, 302). means for indicating that it has received a radio link failure report from the cell (104, 304), wherein the access terminal (102, 302) has reestablished a connection in the first cell (104, 304) after a radio link failure; and comprising means for adapting (710, 812, 922) at least one transition parameter in the first cell (104, 304) based on the detection. 11. A computer program product, characterized by: indicating that a computer has received a radio link failure report from the first cell (104, 304) for an access terminal (102, 302) within a certain period of time, readable by the computer, containing code to do the following, where it indicates that the radio link has been re-established; detecting (708, 810, 920) that there is an access terminal based on the received message by the first cell (104, 304); and based on detection, it contains at least one transition by the first cell (104, 304). 12. A communication method, characterized by: indicating that it has received a radio link failure report from the third cell (108, 408) for an access terminal (102, 402) within a certain period of time after its completion, where it indicates a radio link failure and then, the first cell ( 104, 404) or the second cell (106), indicating that it is connected; detecting by the first cell (104, 404), based on the message received, that the access terminal has reached the cell (1012, 1120); and based on the detection, at least one transition parameter is set to the first first in cell (104, 404) 13. It is a method according to claim 12, and its feature is; wherein the detection process is based on a second, wherein the handover report message is sent to an access terminal (102, 402) that re-establishes a connection in a third cell (108, 408), indicating that the access terminal (102) has experienced a radio link failure in the cell (106, 406). is to show. 14. A device (104, 404) for communication, characterized by: indicating that it has received a radio link failure report from the third cell (108, 408) for an access terminal (102, 402) within a certain period of time after the completion of its transmission, where the radio link failure the report shows that access 102, 402 is reconnected in the second cell 106, 406; means for detecting (1012, 1120) whether the transition to the second cell (106, 406) has occurred to a wrong cell; and comprising means (1014, 1120) for adapting at least one transition parameter in the first cell (104, 404) based on the detection. 15. A computer program product, characterized by: indicating that a computer has received a radio link failure report from the third cell (108, 408) for an access terminal (102, 402) within a specified period of time upon completion, which is computer readable, containing code to do the following: , wherein it indicates a radio link failure and then the first cell (104, 404) or the second cell (106) is connected; based on the message received by the first cell (104, 404), it is determined that the access terminal has reached the cell (1012, 1120). ); and based on the determination, at least one transition parameter is placed in the first cell (104, 404) in the first DESCRIPTION BACKGROUND OF THE INVENTION Field of the Invention This application relates to communication in general and more specifically, but not exclusively, to communication by adapting transition parameters. A wireless communication network is deployed in a particular geographical area to provide various services (e.g. voice, data, multimedia services, etc.) to users in that geographical area. In a typical application, access points (e.g., corresponding to different cells) are distributed throughout a network to provide wireless connectivity for access terminals (e.g., mobile phones) operating within the geographic area served by the network. Generally, at a given time, the access terminal will be serviced by a specific one of these access points. As the access terminal moves within this geographic area, the access terminal may move further away from the service access point and move closer to another access point. In addition, signal conditions within a particular cell may change so that one access terminal may be better served by another access point. In such cases, to preserve mobility for the access terminal, the access terminal can be handed over from the service access point to the other access point. In its preferred form, the transition occurs without any loss or disruption in the existing communication path. However, in practice, various transition errors may occur. Such failures may include, for example, radio link failures (RLFs) and call dropouts. Some of these failures are related to manually configured or incorrectly controlled crossover parameters. If these parameters are not configured optimally, transition failures may occur. These faults can generally be considered in categories d'ort: 1) transitions that occur too early; 2) very late transitions; 3) transitions that are not properly triggered; and 4) transitions that bounce back and forth between access points (sometimes called a “ping-pong game”). In some views, the explanation relates to transition parameter adaptation (e.g. optimization). In some aspects of the description, different schemes are described to facilitate the self-optimization function on access points in a system. Here, the settings of the transit parameters are automatically adapted by the access points (e.g. without human intervention) to improve (e.g. maximize) the transit performance in the system. Describes a method for distribution in a mobile communications system. A handover threshold set in the MS varies depending on the quality of the wireless link between the MS and a first radio BS currently controlling the MS. Then, the process for switching M82 from the first BS to the second wireless BS is carried out according to the transition threshold. Huawei document: “Solutions for the Mobility Robustness use case”, 3GPP Draft; It describes the collection of counter information by eNBrs regarding transitions that occur too early and/or too late between R3-. This meter information is reported by the eNBs to a central network organization, which then adjusts the migration parameters and sends these updated parameters to the reporting eNBs. Huawei document: “RLF Analysis”; 3GPP Draft; R2-081697; RAN WGZ, Shenzhen, China; It proposes a process to determine adjustments to the migration parameters of source and/or target cells by statistically analyzing 25 March information. RLF information is collected by UEs and sent to the network for analysis. discloses a method for providing an adaptive IP relay triggering system for a wireless communications system. A mobile node is notified of at least one access pretrigger parameter by an existing access network. At least one variable transition threshold is established with the mobile node base in at least one pre-trigger timing parameter. When the mobile node's pilot beacon strength reaches the variable handover threshold, a subsequent IP handover to a candidate access network is initiated. Samsung document: “Use case and requirement for Mobility Robustness 11-21) describes approaches to optimize migration parameters to minimize migration-related RLF based on the transfer of an RLF report from a target cell to a source cell. The present invention is defined in the independent claims.