Method and system for notifying channel quality information by using relay node network

Abstract

The invention provides a method and a system for notifying channel quality information by using a relay node network, and the method comprises the steps: respectively carrying out the statistical analysis of first channel quality indications and second channel quality indications sent by a plurality of user equipment, carrying out the recognition and elimination of abnormal channel quality indications, and finally generating a corresponding composite signal quality measure; and obtaining a buffer state of the user equipment, and notifying the user equipment access node whenever the buffer state satisfies a first preset notification condition or each composite signal quality measurement satisfies a second preset notification condition. The invention solves the problems that the prior art is limited by a communication environment and overload or underload of a buffer, real-time and accurate channel state information cannot be provided, network resources are seriously wasted, and the accuracy and the real-time performance of channel quality information are poor. Adjustment can be carried out according to actual requirements of the user equipment, and the overall communication quality and the system performance are improved.

Description

Technical Field

[0001] The present invention relates to the field of power communication technology, and in particular to a method and system for notifying channel quality information using a relay node network. Background Art

[0002] In the relay node network of wireless communication systems, resource management and channel status information reporting are key technologies to ensure efficient communication and good user experience. The wireless channel environment is complex and changeable, and is affected by many factors such as physical obstacles, weather conditions, and electromagnetic interference, which will cause fluctuations in channel quality. In the face of complex channel environments, how to capture channel changes in a timely manner and provide a reasonable resource allocation strategy will be a key technology that affects the overall network performance.

[0003] At present, the existing technology mainly uses a fixed periodic reporting mechanism to capture channel changes and configure policies, but the fixed resource allocation strategy often cannot adapt to the dynamically changing network environment, resulting in waste or shortage of resources, affecting the overall network performance; at the same time, it is also necessary to consider the problem of buffer overload or underload affecting communication quality. Although the periodic reporting mechanism can provide continuous channel status information, when the channel conditions change rapidly, the fixed reporting frequency may not be able to capture the changes in time, resulting in decision lag. Although the triggered reporting mechanism can quickly respond to changes in channel conditions, if there is no reasonable trigger condition setting, it may lead to excessive reports and increase the network burden; in addition, the traditional CQI reporting method is usually sent directly by the user equipment (UE) to the access node (AN), which may not provide real-time and accurate channel status information in some scenarios (such as obstacles or long distances) and cause serious waste of network resources. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a method and system for notifying channel quality information using a relay node network, thereby improving the accuracy and real-time performance of channel quality information and optimizing the utilization of network resources. At the same time, by verifying and filtering the channel quality indication, and monitoring and reporting the buffer status, the stability and reliability of the system are further improved.

[0005] To achieve the above object, an embodiment of the present invention provides a method for notifying channel quality information using a relay node network, comprising: receiving a first channel quality indication and a second channel quality indication sent by a plurality of user equipments, performing statistical analysis on the first channel quality indication and the second channel quality indication, respectively, to obtain a first channel quality indication processing result and a second channel quality indication processing result;

[0006] Based on the first channel quality indication processing result and the second channel quality indication processing result, identifying and eliminating abnormal channel quality indications to obtain a first channel quality indication optimization result and a second channel quality indication optimization result;

[0007] Integrating the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric;

[0008] The buffer status of the user equipment is obtained, and whenever the buffer status satisfies a first preset notification condition or each composite signal quality metric satisfies a second preset notification condition, the buffer status and the composite signal quality metric are sent as channel quality information to the user equipment access node for notification.

[0009] Further, the receiving of the first channel quality indication and the second channel quality indication sent by the plurality of user equipments, performing statistical analysis on the first channel quality indication and the second channel quality indication respectively, and obtaining the first channel quality indication processing result and the second channel quality indication processing result, includes:

[0010] Collect all channel quality indications sent by a single user equipment to obtain a first channel quality indication;

[0011] By receiving a radio band resource authorization signal, collecting a channel quality indication of each user equipment on a preset radio band resource, and obtaining a second channel quality indication;

[0012] The standard deviation and the average value of the first channel quality indication and the second channel quality indication are calculated respectively to obtain a first standard deviation, a second standard deviation, a first average value, and a second average value; wherein the first standard deviation and the first average value are used as the first channel quality indication processing result; and the second standard deviation and the second average value are used as the second channel quality indication processing result.

[0013] Further, based on the first channel quality indication processing result and the second channel quality indication processing result, abnormal channel quality indications are identified and eliminated to obtain a first channel quality indication optimization result and a second channel quality indication optimization result, including:

[0014] constructing a first abnormality analysis indicator and a second abnormality analysis indicator based on the first channel quality indication processing result and the second channel quality indication processing result;

[0015] Identify and eliminate the first abnormal analysis indicator and the second abnormal analysis indicator that do not meet the preset abnormal threshold value to obtain a first abnormal processing data set and a second abnormal processing data set;

[0016] Perform moving average filtering on the first exception processing data set and the second exception processing data set to obtain a first channel quality indication optimization result and a second channel quality indication optimization result.

[0017] Further, integrating the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric includes:

[0018] Calculating an average value of each channel quality indication data in the first channel quality indication optimization result to obtain a composite signal quality metric of the user equipment;

[0019] An average value of each channel quality indication data in the second channel quality indication optimization result is calculated to obtain a composite signal quality metric of a radio band resource.

[0020] Further, the obtaining of the buffer status of the user equipment, whenever the buffer status satisfies a first preset notification condition or each composite signal quality metric satisfies a second preset notification condition, sending the buffer status and the composite signal quality metric as channel quality information to the user equipment access node for notification, includes:

[0021] Acquire user equipment buffer data, the buffer data including: remaining data amount and total buffer capacity;

[0022] Calculating a buffer status percentage based on the remaining data amount and the total buffer capacity to obtain a buffer status of the user equipment;

[0023] Whenever the buffer status of the user equipment does not meet the preset load capacity requirement, a first preset notification condition is triggered, and the buffer status is sent as channel quality information to the user equipment access node for notification;

[0024] Whenever the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, the second preset notification condition is triggered, and the composite signal quality metric is sent as channel quality information to the user equipment access node for notification.

[0025] Furthermore, it also includes:

[0026] When the buffer state of the user equipment meets the preset capacity requirement, based on a preset first time interval, sending the buffer state as channel quality information to the user equipment access node for notification;

[0027] When the signal-to-noise ratio of each composite signal quality metric meets the preset dynamic range requirement, the composite signal quality metric is sent as channel quality information to the user equipment access node for notification based on a preset second time interval.

[0028] Furthermore, whenever the buffer status of the user equipment does not meet the preset load capacity requirement, triggering the first preset notification condition, sending the buffer status as channel quality information to the user equipment access node for notification, includes:

[0029] Whenever the buffer status of the user equipment is less than a preset underload requirement or greater than a preset overload requirement, sending an indication signal that the buffer status of the user equipment does not meet the preset capacity requirement;

[0030] Based on the indication signal that the buffer status of the user equipment does not satisfy the preset capacity requirement, a first preset notification condition is triggered, and the buffer status is sent as channel quality information to the user equipment access node for notification.

[0031] Further, whenever the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, triggering a second preset notification condition, and sending the composite signal quality metric as channel quality information to the user equipment access node for notification, includes:

[0032] Whenever the signal-to-noise ratio of each composite signal quality metric changes within a preset dynamic range requirement and remains within a preset third time interval, an indication signal indicating that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement is sent;

[0033] Based on the indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, a second preset notification condition is triggered, and the composite signal quality metric is sent as channel quality information to the user equipment access node for notification.

[0034] Further, whenever the signal-to-noise ratio of each composite signal quality metric changes within a preset dynamic range requirement and maintains a preset third time interval, sending an indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement includes:

[0035] Dividing a preset dynamic range of a signal-to-noise ratio of each composite signal quality metric into a plurality of signal-to-noise intervals;

[0036] Whenever the signal-to-noise ratio of each composite signal quality metric changes in the signal-to-noise interval and the signal-to-noise interval remains for a preset third time interval after the change, an indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement is sent.

[0037] The embodiment of the present invention also provides a system for notifying channel quality information using a relay node network, comprising: a data receiving and processing module, a data optimization module, a data integration module and an information notification module;

[0038] The data receiving and processing module is used to receive the first channel quality indication and the second channel quality indication sent by several user equipments, perform statistical analysis on the first channel quality indication and the second channel quality indication respectively, and obtain the first channel quality indication processing result and the second channel quality indication processing result;

[0039] The data optimization module is used to identify and remove abnormal channel quality indications based on the first channel quality indication processing result and the second channel quality indication processing result, so as to obtain a first channel quality indication optimization result and a second channel quality indication optimization result;

[0040] The data integration module is used to integrate the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric;

[0041] The information notification module is used to obtain the buffer status of the user equipment, and whenever the buffer status meets the first preset notification condition or each composite signal quality metric meets the second preset notification condition, the buffer status and the composite signal quality metric are sent as channel quality information to the user equipment access node for notification.

[0042] Beneficial effects:

[0043] (1) The embodiment of the present invention performs statistical analysis and outlier processing on the channel quality indication of each user equipment to ensure the accuracy of the signal quality metric. By using standard deviation calculation and average value calculation, the erroneous signal quality evaluation caused by the abnormality of a single user equipment is effectively filtered out, thereby enhancing the reliability of information. According to each signal quality metric, resource allocation is reasonably optimized to further ensure communication quality.

[0044] (2) The embodiments of the present invention monitor the buffer status and composite signal quality metrics according to various notification conditions, and ensure the load balancing of user equipment in terms of the ability to monitor and report the buffer status. According to different situations, periodic and triggered notification mechanisms are adopted to achieve rapid feedback of channel quality information. Periodic notification can ensure real-time monitoring of channel conditions and also guarantee the timeliness of information. When channel conditions change, triggered notification can quickly update the network status and adjust the resource allocation strategy in time. It can be adjusted according to the actual needs of each user equipment, ensuring the efficiency of resource allocation and improving the overall communication quality and system performance.

[0045] (3) The embodiments of the present invention periodically monitor the buffer status, reasonably set the thresholds of underload requirements and overload requirements, and reasonably use historical data to predict future changes in the buffer status. Whenever a significant change in the buffer status is detected, the access node will be notified of the change in feedback, so as to timely adjust the flow control or retransmission strategy, thereby ensuring efficient use of network resources and stable communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of a method for notifying channel quality information using a relay node network according to an embodiment of the present invention Figure 1 ;

[0047] Figure 2 A schematic diagram of a method for notifying channel quality information using a relay node network according to an embodiment of the present invention Figure 2 ;

[0048] Figure 3 A schematic diagram of channel fading interval division and notification condition triggering of a method for notifying channel quality information using a relay node network provided in an embodiment of the present invention;

[0049] Figure 4 A schematic diagram of the module structure of a system for notifying channel quality information using a relay node network is provided for one embodiment of the present invention. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] Example 1

[0052] See also Figure 1 , Figure 1 A schematic diagram of a method for notifying channel quality information using a relay node network according to an embodiment of the present invention Figure 1 ,like Figure 1 As shown, in this embodiment, it is also combined with Figure 2 , a method for notifying channel quality information using a relay node network Figure 2 Explanation; The embodiment of the present invention proposes a method for notifying channel quality information using a relay node network, including steps 101 to 104, each of which is as follows:

[0053] Step 101, receiving first channel quality indications and second channel quality indications sent by a number of user equipments, performing statistical analysis on the first channel quality indications and the second channel quality indications, respectively, to obtain first channel quality indication processing results and second channel quality indication processing results;

[0054] As an example of this embodiment, all channel quality indications issued by a single user equipment are collected to obtain a first channel quality indication; by receiving a radio band resource authorization signal, the channel quality indications of each user equipment on a preset radio band resource are collected to obtain a second channel quality indication; the standard deviation and the average value of the first channel quality indication and the second channel quality indication are calculated respectively to obtain a first standard deviation, a second standard deviation, a first average value, and a second average value; wherein the first standard deviation and the first average value are used as the first channel quality indication processing result; the second standard deviation and the second average value are used as the second channel quality indication processing result.

[0055] In a specific implementation method, first, receiving resource authorization: an access node (such as a base station) sends an authorization message to a relay node, which includes specific radio band resource information that can be allocated to a user equipment (UE); ensuring that the relay node understands which resources have been allocated to a specific user equipment, so as to prepare for the next step of operation;

[0056] Then, channel quality indication reception: after receiving the above authorization, the relay node will start to monitor or receive channel quality indications (CQI) from the user equipment. These indications are information fed back to the relay node by the user equipment based on the actual communication performance of the currently used radio band resources, that is, the channel quality indication is specific to the radio band resources allocated to each user equipment, wherein the channel quality indication (CQI) can reflect the quality of the channel conditions and is used to dynamically adjust the transmission parameters.

[0057] Furthermore, channel quality indication processing: calculating the channel quality indication CQI from the user equipment, the calculation formula of CQI is:

[0058]

[0059] E c is the effective signal power, N t is the noise power after removing the orthogonal interference in this area, MPO is the measurement power offset sent by the network, and Δ is other factors that affect CQI. CQI is a very important indicator in wireless communication systems. It is measured by the signal-to-noise ratio E c / N tThe comprehensive consideration of other factors can better reflect the actual quality of the channel. After receiving multiple CQI indications, the relay node will perform statistical analysis on them, including calculating the average value μ and standard deviation σ. The average value μ reflects the overall trend of all CQI data, while the standard deviation σ provides the fluctuation range of CQI data distribution, which can help identify outliers. The formula is as follows:

[0060]

[0061] CQI i is the i-th channel quality indication received, and N is the total number of channel quality indications received. By performing the above-mentioned channel quality indication processing steps on all channel quality indications sent by a single user equipment and the channel quality indications of each user equipment on the preset radio band resources, a first standard deviation and a first average value are obtained as a first channel quality indication processing result; and a second standard deviation and a second average value are obtained as a second channel quality indication processing result.

[0062] Step 102: Based on the first channel quality indication processing result and the second channel quality indication processing result, abnormal channel quality indications are identified and eliminated to obtain a first channel quality indication optimization result and a second channel quality indication optimization result;

[0063] As an example of this embodiment, based on the first channel quality indication processing result and the second channel quality indication processing result, a first abnormality analysis indicator and a second abnormality analysis indicator are constructed; the first abnormality analysis indicator and the second abnormality analysis indicator that do not meet the preset abnormal threshold are identified and eliminated to obtain a first abnormality processing data set and a second abnormality processing data set; the first abnormality processing data set and the second abnormality processing data set are subjected to moving average filtering to obtain a first channel quality indication optimization result and a second channel quality indication optimization result.

[0064] A specific implementation scheme is that when the relay node processes the received channel quality indication (CQI), it checks and filters the abnormal values ​​to ensure the accuracy and reliability of the generated composite signal quality metric. Specifically, a preset threshold (equivalent to the preset abnormal threshold) k (k = 2 or 3) can be set to treat CQI values ​​that exceed the average value μ ± kσ as abnormal values. These abnormal values ​​may be caused by various reasons, such as hardware failure, instantaneous channel fluctuations, etc., and therefore need to be excluded from the data set. All CQI values ​​that meet the following formula conditions are retained:

[0065] CQI right ={CQI|μ-kσ≤CQI i ≤μ+kσ}

[0066] After outlier processing, the filtering algorithm can be used to further smooth the CQI data to reduce the impact of short-term fluctuations. A moving average filter can be used to calculate the weighted average of the CQI values ​​of the past N moments using the moving average filtering smoothing technique to obtain the smoothed CQI, which can be achieved using the following formula:

[0067]

[0068] Where CQI(t) is the CQI value received at time t, and N is the window size.

[0069] Step 103, integrating the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric;

[0070] As an example of this embodiment, the average value of each channel quality indication data in the first channel quality indication optimization result is calculated to obtain a composite signal quality metric of the user equipment; the average value of each channel quality indication data in the second channel quality indication optimization result is calculated to obtain a composite signal quality metric of the radio band resources.

[0071] In a specific implementation method, after processing in step 101 and step 102, channel quality indication integration is performed: according to specific needs, the composite signal quality metric specific to the user equipment and the composite signal quality metric of the specific radio band resource are averaged at the relay node, and the channel quality indication of the single user equipment and the channel quality indication of the radio band resource are averaged, and the resource allocation, power control and modulation mode are optimized by analyzing the channel quality of each user equipment and the radio band resource; specifically, the composite signal quality metric specific to the user equipment and the composite signal quality metric specific to the radio band resource can be calculated respectively, and both of these two measurement methods are helpful to optimize resource allocation, power control and modulation mode to improve communication quality. The detailed description of these two measurement methods is as follows:

[0072] (1) Composite signal quality metric of user equipment: the relay node collects all channel quality indicators from a single user equipment and performs statistical analysis on these indicators. Through the statistical analysis, an average CQI value of each user equipment can be obtained as the composite signal quality metric of the user equipment (equivalent to calculating the average value of each channel quality indicator data in the first channel quality indicator optimization result to obtain the composite signal quality metric of the user equipment). This metric reflects the overall channel quality of the user equipment during the entire communication process. According to the composite signal quality metric of each user equipment, resource allocation can be optimized, such as adjusting the bandwidth, code rate and transmission power allocated to the user, to ensure communication quality.

[0073] (2) Composite signal quality metric of radio band resources: The relay node collects channel quality indicators from each user equipment on a specific radio band resource and also performs statistical analysis on the channel quality indicators. Through the statistical analysis, an average CQI value of the specific radio band resource can be obtained as the composite signal quality metric of the radio band resource (equivalent to calculating the average value of each channel quality indicator data in the second channel quality indicator optimization result to obtain the composite signal quality metric of the radio band resource). This metric reflects the overall channel quality of the radio band resource during the entire communication process. Based on the composite signal quality metric of each radio band resource, resource allocation can be optimized, such as adjusting the number of users allocated to the resource, the code rate and the transmission power, etc., to ensure communication quality.

[0074] Step 104, obtaining the buffer status of the user equipment, and whenever the buffer status satisfies a first preset notification condition or each composite signal quality metric satisfies a second preset notification condition, sending the buffer status and the composite signal quality metric as channel quality information to the user equipment access node for notification.

[0075] As an example of this embodiment, the user equipment buffer data is obtained, and the buffer data includes: the amount of remaining data and the total buffer capacity; based on the amount of remaining data and the total buffer capacity, the buffer status percentage is calculated to obtain the buffer status of the user equipment; whenever the buffer status of the user equipment does not meet the preset load capacity requirement, the first preset notification condition is triggered, and the buffer status is sent as channel quality information to the user equipment access node for notification; whenever the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, the second preset notification condition is triggered, and the composite signal quality metric is sent as channel quality information to the user equipment access node for notification. Whenever the buffer status of the user equipment is less than the preset underload requirement or greater than the preset overload requirement, an indication signal that the buffer status of the user equipment does not meet the preset load capacity requirement is issued; based on the indication signal that the buffer status of the user equipment does not meet the preset load capacity requirement, the first preset notification condition is triggered, and the buffer status is sent as channel quality information to the user equipment access node for notification. Whenever the signal-to-noise ratio of each composite signal quality metric changes within a preset dynamic range requirement and maintains a preset third time interval, an indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement is sent; based on the indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, a second preset notification condition is triggered, and the composite signal quality metric is sent as channel quality information to the user equipment access node for notification. The preset dynamic range of the signal-to-noise ratio of each composite signal quality metric is divided into a plurality of signal-to-noise intervals; whenever the signal-to-noise ratio of each composite signal quality metric changes within a signal-to-noise interval and maintains a preset third time interval in the signal-to-noise interval after the change, an indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement is sent.

[0076] A specific possible implementation method is that in a relay node network, detecting the overload or underload state of the buffer of the user equipment is a key measure to ensure network performance and user experience. The relay node regularly collects the buffer data of the user equipment, including the current data volume (equivalent to the remaining data volume) and the total capacity of the buffer (equivalent to the total capacity of the buffer), and compares the current data volume (or the remaining space) with the total capacity, and calculates a percentage value to represent the state of the buffer. This percentage value is usually between 0% and 100%, where 0% indicates that the buffer is empty and 100% indicates that the buffer is full. In order to manage the buffer state more accurately, a fixed threshold value (equivalent to the preset load capacity requirement) is set. In this embodiment, it is set that when the buffer usage rate exceeds 80%, an overload is predicted, and when it is less than 20%, an underload is predicted, that is, when the buffer usage rate exceeds 80%, it is considered that there is an overload risk. If the usage rate drops below 20%, it is considered to be underloaded. The buffer is a key component in network communication. It temporarily stores data, helps smooth data flow, and handles transmission rate mismatches. However, if the buffer is not managed properly, it may lead to overload or underload. Overload will cause packet loss and increased latency, while underload may cause data transmission interruption or inefficiency. Therefore, accurate monitoring and timely response to buffer status changes are essential to maintaining network performance. Relay nodes regularly collect buffer data from user devices, including but not limited to information such as the current data volume and the total capacity of the buffer. These data are used to calculate the buffer usage rate, that is, the proportion of the current data volume to the total capacity. The results are presented in percentage form, ranging from 0% to 100%; 0% means that the buffer is completely idle, while 100% means that the buffer is full and cannot accept new data.

[0077] Perform buffer status processing: determine the buffer overload or buffer underload status of the user equipment at the relay node, predict the buffer overload or buffer underload status, send a signal of the predicted buffer overload or buffer underload status when the buffer status changes significantly (such as underflow / overflow), and the signal is sent to notify each user equipment whose buffer status is determined to be overloaded or underloaded (equivalent to sending an indication signal that the buffer status of the user equipment does not meet the preset load capacity requirement whenever the buffer status of the user equipment is less than the preset underload requirement or greater than the preset overload requirement).

[0078] Execution of sending: including a triggered notification, i.e., a schematic diagram of channel fading interval division and notification condition triggering. When the channel condition changes or when the buffer status changes, in addition to regular updates, when the relay node detects a significant change in the channel condition, it will immediately send a notification to the network; specifically, when the buffer status changes (for example, from normal to overload or underload), a status indication is immediately sent to the access node; or when the composite signal quality metric channel fading changes within a pre-divided interval, a status indication is immediately sent to the access node;

[0079] One explanation is that dynamic range division (equivalent to setting preset dynamic range requirements) is to divide the signal-to-noise ratio (SNR) dynamic range of the terminal user station into N zones, each zone corresponds to a specific signal-to-noise ratio range. In areas with low signal-to-noise ratio, narrower intervals can be set to monitor channel changes more accurately; in areas with high signal-to-noise ratio, wider intervals can be set to reduce unnecessary reporting. For example, when the signal-to-noise ratio is between 0-10dB, it can be divided into 0-2dB, 2-4dB, 4-6dB, 6-8dB When the signal-to-noise ratio increases suddenly, for example, the signal-to-noise ratio increases from interval m (m∈(1,N)) to interval m+1, the channel quality information is notified. When the signal-to-noise ratio decreases suddenly, for example, the signal-to-noise ratio decreases from interval m to interval m-1, the channel quality information is also notified (equivalent to the signal-to-noise ratio based on each composite signal quality metric not meeting the preset dynamic range). A state range requirement indication signal is sent to trigger a second preset notification condition, and the composite signal quality metric is sent as channel quality information to the user equipment access node for notification), and a minimum duration threshold T (equivalent to the preset third time interval) is set to ensure that the signal-to-noise ratio is maintained in a new area for a period of time before triggering the report, so as to avoid frequent reporting due to short-term fluctuations. A specific explanation is that when the signal-to-noise ratio crosses from one interval to another, the reporting of the channel quality information is triggered. For example, the signal-to-noise ratio increases from 5dB to 7dB. Because it is still in the same interval, it will not trigger the report; but if it increases from 5dB to 10dB and crosses the interval boundary, it will trigger the report. When the signal-to-noise ratio is within any of the divided intervals, the channel quality information is not notified. This indicates that in a stable signal-to-noise ratio state, the network does not need to frequently update information. A minimum duration threshold T (equivalent to the preset third time interval) is set. For example, after the signal-to-noise ratio enters a new interval, it must be maintained in this interval for at least 100ms to trigger the report.

[0080] As another example of an embodiment of the present invention, when the buffer status of a user device meets a preset capacity requirement, based on a preset first time interval, the buffer status is sent as channel quality information to an access node of the user device for notification; when the signal-to-noise ratio of each composite signal quality metric meets a preset dynamic range requirement, based on a preset second time interval, the composite signal quality metric is sent as channel quality information to an access node of the user device for notification.

[0081] A specific explanation is that in addition to the triggered notification method, there is also a periodic notification method, which is carried out periodically. Under normal circumstances, the usual notification period is generally set to 40ms. When communication is in progress, the period is generally set to within 10ms. For the status change of the buffer, a regular reporting time interval (preset first time interval) is set to send an indication of the predicted buffer overload or buffer underload status to the access node; in this embodiment, the standard period refers to the situation in which the relay node sends channel quality information to the network at a fixed period (such as every 40 milliseconds) in the absence of specific requirements. This helps the network maintain a basic understanding of the channel status and ensure the timeliness of the information even when the channel conditions are relatively stable; shortening the period means that when communication activities are in progress, especially for those delay-sensitive applications (such as VoIP, video conferencing, etc.), the relay node will increase the update frequency of the channel quality information, which may be shortened to within 10 milliseconds, so that channel changes can be captured more quickly and service interruptions or quality degradation caused by channel fluctuations can be reduced.

[0082] The embodiment of the present invention proposes a method for notifying channel quality information using a relay node network. By statistically analyzing the channel quality indication of each user device and processing abnormal values, the accuracy of the signal quality metric is guaranteed. By using standard deviation calculation and average value calculation, the erroneous signal quality evaluation caused by the abnormality of a single user device is effectively filtered, thereby enhancing the reliability of information. According to each signal quality metric, resource allocation is reasonably optimized to further ensure the communication quality. According to a variety of notification conditions, the buffer status and the composite signal quality metric are monitored, and the ability to monitor and report the buffer status is improved to ensure the load balancing of the user equipment. According to different situations, periodic and triggered notification mechanisms are adopted to achieve channel quality. Rapid feedback of information on the amount of traffic, periodic notifications can ensure real-time monitoring of channel conditions and the timeliness of information. When channel conditions change, triggered notifications can quickly update the network status and adjust the resource allocation strategy in a timely manner. They can be adjusted according to the actual needs of each user device to ensure the efficiency of resource allocation and improve the overall communication quality and system performance. By regularly monitoring the buffer status, reasonably setting the thresholds for underload and overload requirements, and reasonably using historical data to predict future changes in the buffer status, whenever a significant change in the buffer status is detected, the access node will be notified with immediate feedback to achieve timely adjustment of flow control or retransmission strategies, thereby ensuring efficient use of network resources and stability of communication quality.

[0083] Example 2

[0084] See also Figure 4 , Figure 4 A schematic diagram of the module structure of a system using a relay node network to notify channel quality information is provided in one embodiment of the present invention. Figure 4As shown, an embodiment of the present invention proposes a system for notifying channel quality information using a relay node network, including:

[0085] Data receiving and processing module 401, data optimization module 402, data integration module 403 and information notification module 404;

[0086] The data receiving and processing module 401 is used to receive the first channel quality indication and the second channel quality indication sent by several user equipments, perform statistical analysis on the first channel quality indication and the second channel quality indication, respectively, to obtain the first channel quality indication processing result and the second channel quality indication processing result;

[0087] The data optimization module 402 is used to identify and remove abnormal channel quality indications based on the first channel quality indication processing result and the second channel quality indication processing result, so as to obtain a first channel quality indication optimization result and a second channel quality indication optimization result;

[0088] The data integration module 403 is used to integrate the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric;

[0089] The information notification module 404 is used to obtain the buffer status of the user equipment, and whenever the buffer status meets the first preset notification condition or each composite signal quality metric meets the second preset notification condition, send the buffer status and the composite signal quality metric as channel quality information to the user equipment access node for notification.

[0090] The embodiment of the present invention proposes a system that uses a relay node network to notify channel quality information. After receiving the resource authorization of the access node, the relay node starts to monitor the channel quality indication (CQI) of the user equipment, and performs statistical analysis on these indications, identifies and excludes abnormal values, and finally generates a composite signal quality metric by optimizing the channel quality indication. This metric not only reflects the actual quality of the channel, but also provides a basis for optimizing resource allocation, power control and modulation mode. By setting different notification conditions for the buffer and the composite signal quality metric, the access node is notified immediately once a significant change is detected, so as to adjust the flow control or retransmission strategy in time, thereby ensuring efficient use of network resources and stable communication quality.

[0091] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0093] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

Claims

1. A method for notifying channel quality information using a relay node network, characterized in that: include: receiving first channel quality indications and second channel quality indications sent by a plurality of user equipments, performing statistical analysis on the first channel quality indications and the second channel quality indications respectively, and obtaining first channel quality indication processing results and second channel quality indication processing results; Based on the first channel quality indication processing result and the second channel quality indication processing result, identifying and eliminating abnormal channel quality indications to obtain a first channel quality indication optimization result and a second channel quality indication optimization result; Integrating the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric; The buffer status of the user equipment is obtained, and whenever the buffer status satisfies a first preset notification condition or each composite signal quality metric satisfies a second preset notification condition, the buffer status and the composite signal quality metric are sent as channel quality information to the user equipment access node for notification.

2. A method for notifying channel quality information using a relay node network as claimed in claim 1, characterized in that: The receiving first channel quality indication and second channel quality indication sent by a plurality of user equipments, performing statistical analysis on the first channel quality indication and the second channel quality indication respectively, and obtaining a first channel quality indication processing result and a second channel quality indication processing result, comprises: Collect all channel quality indications sent by a single user equipment to obtain a first channel quality indication; By receiving a radio band resource authorization signal, collecting a channel quality indication of each user equipment on a preset radio band resource, and obtaining a second channel quality indication; The standard deviation and the average value of the first channel quality indication and the second channel quality indication are calculated respectively to obtain a first standard deviation, a second standard deviation, a first average value, and a second average value; wherein the first standard deviation and the first average value are used as the first channel quality indication processing result; and the second standard deviation and the second average value are used as the second channel quality indication processing result.

3. A method for notifying channel quality information using a relay node network as claimed in claim 2, characterized in that: Based on the first channel quality indication processing result and the second channel quality indication processing result, abnormal channel quality indications are identified and eliminated to obtain a first channel quality indication optimization result and a second channel quality indication optimization result, including: constructing a first abnormality analysis indicator and a second abnormality analysis indicator based on the first channel quality indication processing result and the second channel quality indication processing result; Identify and eliminate the first abnormal analysis indicator and the second abnormal analysis indicator that do not meet the preset abnormal threshold value to obtain a first abnormal processing data set and a second abnormal processing data set; Perform moving average filtering on the first exception processing data set and the second exception processing data set to obtain a first channel quality indication optimization result and a second channel quality indication optimization result.

4. A method for notifying channel quality information using a relay node network as claimed in claim 2, characterized in that: Integrating the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric, including: Calculating an average value of each channel quality indication data in the first channel quality indication optimization result to obtain a composite signal quality metric of the user equipment; An average value of each channel quality indication data in the second channel quality indication optimization result is calculated to obtain a composite signal quality metric of a radio band resource.

5. A method for notifying channel quality information using a relay node network as claimed in claim 1, characterized in that: The obtaining of the buffer status of the user equipment, and whenever the buffer status satisfies a first preset notification condition or each composite signal quality metric satisfies a second preset notification condition, sending the buffer status and the composite signal quality metric as channel quality information to the user equipment access node for notification, comprises: Acquire user equipment buffer data, the buffer data including: remaining data amount and total buffer capacity; Calculating a buffer status percentage based on the remaining data amount and the total buffer capacity to obtain a buffer status of the user equipment; Whenever the buffer status of the user equipment does not meet the preset load capacity requirement, a first preset notification condition is triggered, and the buffer status is sent as channel quality information to the user equipment access node for notification; Whenever the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, the second preset notification condition is triggered, and the composite signal quality metric is sent as channel quality information to the user equipment access node for notification.

6. A method for notifying channel quality information using a relay node network as claimed in claim 5, characterized in that: Also includes: When the buffer state of the user equipment meets the preset capacity requirement, based on a preset first time interval, sending the buffer state as channel quality information to the user equipment access node for notification; When the signal-to-noise ratio of each composite signal quality metric meets the preset dynamic range requirement, the composite signal quality metric is sent as channel quality information to the user equipment access node for notification based on a preset second time interval.

7. A method for notifying channel quality information using a relay node network as claimed in claim 5, characterized in that: Whenever the buffer status of the user equipment does not meet the preset load capacity requirement, triggering the first preset notification condition, sending the buffer status as channel quality information to the user equipment access node for notification, includes: Whenever the buffer status of the user equipment is less than a preset underload requirement or greater than a preset overload requirement, sending an indication signal that the buffer status of the user equipment does not meet the preset capacity requirement; Based on the indication signal that the buffer status of the user equipment does not satisfy the preset capacity requirement, a first preset notification condition is triggered, and the buffer status is sent as channel quality information to the user equipment access node for notification.

8. A method for notifying channel quality information using a relay node network as claimed in claim 5, characterized in that: Whenever the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, triggering a second preset notification condition, sending the composite signal quality metric as channel quality information to the user equipment access node for notification, includes: Whenever the signal-to-noise ratio of each composite signal quality metric changes within a preset dynamic range requirement and remains within a preset third time interval, an indication signal indicating that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement is sent; Based on the indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement, a second preset notification condition is triggered, and the composite signal quality metric is sent as channel quality information to the user equipment access node for notification.

9. A method for notifying channel quality information using a relay node network as claimed in claim 8, characterized in that: Whenever the signal-to-noise ratio of each composite signal quality metric changes within a preset dynamic range requirement and maintains a preset third time interval, sending an indication signal indicating that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement includes: Dividing a preset dynamic range of a signal-to-noise ratio of each composite signal quality metric into a plurality of signal-to-noise intervals; Whenever the signal-to-noise ratio of each composite signal quality metric changes in the signal-to-noise interval and the signal-to-noise interval remains for a preset third time interval after the change, an indication signal that the signal-to-noise ratio of each composite signal quality metric does not meet the preset dynamic range requirement is sent.

10. A system for notifying channel quality information using a relay node network, characterized in that: Executing a method for notifying channel quality information using a relay node network as claimed in any one of claims 1 to 9, comprising: Data receiving and processing module, data optimization module, data integration module and information notification module; The data receiving and processing module is used to receive the first channel quality indication and the second channel quality indication sent by several user equipments, perform statistical analysis on the first channel quality indication and the second channel quality indication respectively, and obtain the first channel quality indication processing result and the second channel quality indication processing result; The data optimization module is used to identify and remove abnormal channel quality indications based on the first channel quality indication processing result and the second channel quality indication processing result, so as to obtain a first channel quality indication optimization result and a second channel quality indication optimization result; The data integration module is used to integrate the first channel quality indicator optimization result and the second channel quality indicator optimization result to generate a corresponding composite signal quality metric; The information notification module is used to obtain the buffer status of the user equipment, and whenever the buffer status meets the first preset notification condition or each composite signal quality metric meets the second preset notification condition, the buffer status and the composite signal quality metric are sent as channel quality information to the user equipment access node for notification.

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