Multi-channel repeater information source selection and reselection method based on multiple indexes

Abstract

The invention provides a multi-channel repeater information source selection and reselection method based on multiple indexes, which comprises the following steps of: searching each information source frequency band, and judging whether network parameters of the current frequency band can be acquired or not; calculating the score of each cell by using the theoretical downlink output power and the nominal downlink output power to obtain a final cell; obtaining the reference signal receiving power, the signal-to-noise ratio and the cell score of each frequency band of the final selection cell, and performing frequency band selection to obtain a working frequency band; switching the multi-channel repeater to a corresponding channel of the working frequency band to obtain a working channel; continuously monitoring an information source network of the working channel, and judging whether to execute network-off reselection or not; and regularly collecting the reference signal receiving power of the working channel, and judging whether to execute RSRP deterioration reselection or not. According to the method, the RSRP, the SINR and the frequency band priority can be comprehensively considered, the optimal information source frequency band is dynamically selected, and the coverage capability, the communication quality and the resource utilization rate of the network are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless communication, and in particular to a multi-channel repeater signal source selection and reselection method based on multiple indicators. Background Art

[0002] With the rapid development of wireless communication technology, repeaters, as essential equipment for expanding network coverage and enhancing signal quality, are widely used in complex environments such as cities, rural areas, and tunnels, including underground parking lots, elevators, and underground supermarkets. Multi-channel repeaters can effectively improve network capacity and coverage by supporting multiple frequency bands and signal sources. However, in practical applications, multi-channel repeaters have the following shortcomings:

[0003] 1) Fixed signal source selection: Traditional repeaters typically use a fixed signal source selection strategy, pre-configuring one or more signal sources without the ability to dynamically adjust based on the real-time network environment. This strategy can easily lead to decreased communication quality in scenarios with significant signal quality fluctuations.

[0004] 2) Single-metric selection: Some repeaters support signal source selection, but they rely solely on a single metric, such as RSSI (Received Signal Strength Indicator) or RSRP (Reference Signal Received Power). This approach ignores factors such as signal quality, such as SINR (Signal to Interference plus Noise Ratio) and frequency band priority. This can result in selecting a signal source with high signal strength but severe interference, impacting the user experience.

[0005] 3) Lack of dynamic adjustment capabilities: Existing technologies generally lack dynamic adjustment capabilities. When the signal strength or quality of the signal source changes, the repeater cannot adjust the signal source selection and channel opening strategy in time, resulting in degraded network performance. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a multi-channel repeater source selection and reselection method based on multiple indicators, which can comprehensively consider RSRP, SINR and frequency band priority, dynamically select the best source frequency band, and improve the network coverage capability, communication quality and resource utilization.

[0007] To achieve the above object, the present invention provides the following solution: a multi-channel repeater source selection and reselection method based on multiple indicators, comprising the following steps:

[0008] S1. Search each signal source frequency band for each cell and determine whether the network parameters of the current frequency band can be obtained. If so, calculate the theoretical downlink output power of the current frequency band. If not, continue searching.

[0009] S2. Calculate a score for each cell using the theoretical downlink output power and the nominal downlink output power, and screen cells based on the scores to obtain a final selected cell.

[0010] S3. Based on the final selected cell, obtain the reference signal received power, signal-to-noise ratio, and cell score of each frequency band, and perform frequency band selection to obtain an operating frequency band;

[0011] S4. Switch the multi-channel repeater to the corresponding channel of the working frequency band to obtain the working channel, and record the initial reference signal received power of the working frequency band;

[0012] S5, continuously monitoring the source network of the working channel to determine whether to perform network reselection, if so, return to step S1, if not, loop through step S5;

[0013] S6. Regularly collect the reference signal received power of the working channel and determine whether to perform RSRP deterioration reselection. If so, return to step S1; if not, loop through step S6.

[0014] Optionally, the network parameters include reference signal received power, signal-to-noise ratio, and bandwidth, and the calculation expression for the theoretical downlink output power is:

[0015] P RSRP =RSRP+10*log 10 (12*N RB )+G Band-DL-Norminal

[0016] Among them, P RSRP is the downlink output power calculated based on the cell reference signal received power, RSRP is the cell reference signal received power, N RB is the number of RBs corresponding to the cell bandwidth, G Band-DL-Norminal It is the nominal downlink gain of the channel corresponding to this frequency band of the repeater.

[0017] Optionally, using the theoretical downlink output power and the nominal downlink output power, calculating a score for each cell, and performing cell screening and recording based on the score for each cell, including:

[0018] The theoretical downlink output power and the nominal downlink output power are used to calculate the score of each cell. The calculation expression of the cell score is:

[0019] S=P RSRP -P Band-DL-Norminal

[0020] Among them, S is the score of each community, P Band-DL-Norminal The nominal downlink output power of the repeater corresponding to the channel in this frequency band;

[0021] Filter cells with cell scores greater than or equal to 0 to obtain initially selected cells. When the number of initially selected cells is 1, set the initially selected cell as the final selected cell. When the number of initially selected cells is greater than or equal to 2, set the cell with the largest signal-to-noise ratio among the initially selected cells as the final selected cell. When the number of initially selected cells is 0, set the cell with the largest reference signal received power as the final selected cell, and record the reference signal received power, signal-to-noise ratio, and cell score of the final selected cell.

[0022] Optionally, based on the final selected cell, obtaining a reference signal received power, a signal-to-noise ratio, and a cell score of each frequency band, and performing frequency band selection to obtain an operating frequency band includes:

[0023] Based on the final selected cell, obtaining the reference signal received power, signal-to-noise ratio, and cell score of each frequency band, and calculating the cell score of each frequency band;

[0024] The frequency bands whose cell scores are greater than or equal to 0 are screened to obtain the initially selected frequency bands. When the number of the initially selected frequency bands is 1, the initially selected frequency band is set as the working frequency band. When the number of the initially selected cells is greater than or equal to 2, the frequency band with the largest signal-to-noise ratio in the initially selected frequency bands is set as the working frequency band. When the number of the initially selected frequency bands is 0, the frequency band with the largest reference signal received power is set as the working frequency band.

[0025] Optionally, the source network of the working channel is continuously monitored to determine whether to perform network reselection. If so, return to step S1; if not, loop through step S5, including:

[0026] S5-1, continuously monitoring the source network of the working channel to determine whether the source network is disconnected. If so, proceed to step S5-2; if not, proceed to step S5-1;

[0027] S5-2. When the source network is disconnected, determine whether the uplink output power of other channels in the working frequency band is lower than a first preset threshold. If so, return to step S1; if not, return to step S5-1.

[0028] Optionally, the reference signal received power of the working channel is collected periodically to determine whether to perform RSRP deterioration reselection. If so, return to step S1; if not, loop through step S6, including:

[0029] S6-1. Periodically collect the reference signal received power of the working channel to obtain a reference signal received power detection value, and determine whether the difference between the initial reference signal received power and the reference signal received power detection value is greater than a preset deterioration threshold. If so, proceed to step S6-2; if not, continue to step S6-1.

[0030] S6-2. When the difference between the initial reference signal received power and the reference signal received power detection value is greater than a preset deterioration threshold, obtain the current downlink output power of the working channel and determine whether the current downlink power is lower than a second preset threshold. If so, proceed to step S6-3; if not, continue to step S6-1.

[0031] S6-3. When the current downlink power is lower than the second preset threshold, determine whether the uplink output power of other working channels in the working frequency band is lower than the third preset threshold. If so, return to step S1; if not, return to step S6-1.

[0032] The present invention provides a multi-channel repeater signal source selection and reselection method based on multiple indicators, and discloses the following technical effects:

[0033] 1. Dynamic selection of signal sources: This invention dynamically selects the optimal frequency band by evaluating signal source quality (RSRP, SINR, bandwidth, etc.) in real time, thus avoiding the limitations of traditional fixed signal source selection strategies.

[0034] 2. Diversified indicators: The present invention comprehensively considers multiple indicators such as RSRP, SINR and bandwidth, avoiding the shortcomings of single indicator selection (such as relying solely on RSRP).

[0035] 3. Strong dynamic adjustment performance: This invention introduces a frequency band priority mechanism. When multiple frequency bands have similar scores, the highest frequency band is selected based on priority. Furthermore, this invention has designed a network loss reselection and RSRP deterioration reselection mechanism to ensure rapid recovery in the event of network anomalies, reducing communication interruption time and improving network performance.

[0036] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1A schematic diagram of the method flow provided in Example 1 of the present invention;

[0039] Figure 2 A schematic diagram of a cell selection method provided in Example 1 of the present invention;

[0040] Figure 3 A flowchart of a frequency band selection method provided in Example 1 of the present invention;

[0041] Figure 4 A schematic flow chart of a method for reselecting a network after a network dropout provided in Example 1 of the present invention;

[0042] Figure 5 This is a flow chart of a method for reselecting RSRP deterioration provided in Example 1 of the present invention. DETAILED DESCRIPTION

[0043] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0044] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Example 1

[0046] like Figure 1 As shown, the present invention provides a multi-channel repeater source selection and reselection method based on multiple indicators, comprising the following steps:

[0047] S1, such as Figure 2 As shown, based on each cell, each source frequency band is searched, and it is determined whether the network parameters of the current frequency band can be obtained. If so, the theoretical downlink output power of the current frequency band is calculated. If not, the search continues;

[0048] The network parameters include reference signal received power (RSRP), signal-to-noise ratio (SINR) and bandwidth (Bandwidth, BW). The calculation expression of the theoretical downlink output power is:

[0049] P RSRP =RSRP+10*log 10 (12*N RB )+G Band-DL-Norminal

[0050] Among them, P RSRPis the downlink output power calculated based on the cell reference signal received power, RSRP is the cell reference signal received power, N RB is the number of RBs corresponding to the cell bandwidth, G Band-DL-Norminal It is the nominal downlink gain of the channel corresponding to this frequency band of the repeater.

[0051] S2, such as Figure 2 As shown, the theoretical downlink output power and the nominal downlink output power are used to calculate the score of each cell, and based on the score of each cell, the cells are screened to obtain the final selected cells; specifically, the following steps are included:

[0052] The theoretical downlink output power and the nominal downlink output power are used to calculate the score of each cell. The calculation expression of the cell score is:

[0053] S=P RSRP -P Band-DL-Norminal

[0054] Among them, S is the score of each community, P Band-DL-Norminal It is the nominal downlink output power of the repeater corresponding to the channel in this frequency band.

[0055] Filter the cells with cell scores greater than or equal to 0 to obtain the initial selected cells:

[0056] Case 1: When the number of the initially selected cells is 1, the initially selected cell is set as the final selected cell;

[0057] Case 2: When the number of the initially selected cells is greater than or equal to 2, the cell with the largest signal-to-noise ratio among the initially selected cells is set as the final selected cell;

[0058] Case 3: When the number of the initially selected cells is 0 (ie, no cell meets the conditions), the cell with the largest reference signal received power is set as the final selected cell.

[0059] Then record the reference signal received power, signal-to-noise ratio and cell score of the final selected cell.

[0060] S3, such as Figure 3 As shown, based on the final selected cell, the reference signal received power, signal-to-noise ratio and cell score of each frequency band are obtained, and the frequency band is selected to obtain the working frequency band; including:

[0061] Based on the final selected cell, obtain the reference signal received power, signal-to-noise ratio, and cell score of each frequency band, and calculate the cell score of each frequency band; filter the frequency bands whose cell scores are greater than or equal to 0 to obtain the initially selected frequency bands:

[0062] Case 1: when the number of the initially selected frequency band is 1, the initially selected frequency band is set as the working frequency band;

[0063] Case 2: When the number of the initially selected cells is greater than or equal to 2, the frequency band with the largest signal-to-noise ratio among the initially selected frequency bands is set as the working frequency band; further, if the signal-to-noise ratios are the same, the working frequency band is selected according to the frequency band priority;

[0064] Case 3: When the number of initially selected frequency bands is 0 (i.e., no frequency band meets the conditions), the frequency band with the largest reference signal receiving power is set as the working frequency band; further, if the reference signal receiving powers are the same, the frequency band corresponding to the larger signal-to-noise ratio value is selected as the working frequency band; if no selection is made, the frequency band priority is selected.

[0065] S4, such as Figure 3 As shown, the multi-channel repeater is switched to the corresponding channel of the working frequency band to obtain the working channel, and the initial reference signal received power of the working frequency band is recorded;

[0066] S5, such as Figure 4 As shown, the source network of the working channel is continuously monitored to determine whether to perform network reselection. If so, return to step S1; if not, loop through step S5. Specifically, it includes:

[0067] S5-1. Continuously monitor the source network of the working channel to determine whether the source network is disconnected. If so, proceed to step S5-2; if not, proceed to step S5-1.

[0068] S5-2. When the source network is disconnected, determine whether the uplink output power of other channels in the working frequency band is lower than a first preset threshold. If so, return to step S1; if not, return to step S5-1.

[0069] S6, such as Figure 5 As shown, the reference signal received power of the working channel is regularly collected to determine whether to perform RSRP deterioration reselection. If so, return to step S1, if not, loop through step S6. Specifically including:

[0070] S6-1. Regularly collect the reference signal received power of the working channel to obtain a reference signal received power detection value RSRP Det , determine the initial reference signal received power RSRP Initial and the reference signal received power detection value RSRP Det Is the difference between them greater than the preset degradation threshold RSRP? Thr :

[0071] RSRP Initial -RSRP Det -RSRP Thr ≥0

[0072] If yes, proceed to step S6-2; if no, continue to step S6-1.

[0073] S6-2, when the difference between the initial reference signal received power and the reference signal received power detection value is greater than the preset deterioration threshold, obtain the current downlink output power P of the working channel DL , determine the current downlink power P DL Is it lower than the second preset threshold P DL-Thr :

[0074] P DL -P DL-Thr ≥0

[0075] If yes, proceed to step S6-3; if no, continue to step S6-1.

[0076] S6-3. When the current downlink power is lower than the second preset threshold, determine whether the uplink output power of other working channels in the working frequency band is lower than the third preset threshold. If so, return to step S1; if not, return to step S6-1.

[0077] Example 2

[0078] 1. Examples of cell selection methods are as follows:

[0079] Assuming that the multi-channel repeater supports B3, B8, B39 and B40 frequency bands, the above cell selection steps are as follows:

[0080] Obtain the network parameters of the source frequency band B3, including: RSRP, reference signal received power; SINR, signal to interference plus noise ratio; BW, bandwidth.

[0081] get:

[0082] {RSRP Cell1 ,SINR Cell1 ,BW Cell1}: Network parameters of cell 1;

[0083] {RSRP Cell2 ,SINR Cell2 ,BW Cell2}: Network parameters of cell 2;

[0084] {RSRP Cell3 ,SINR Cell3 ,BW Cell3}: Network parameters of cell 3;

[0085] Calculate the downlink output power P based on the RSRP value and BW value Cell-RSRP ;

[0086] Calculate the downlink output power for each frequency band using the following formula:

[0087] P Cell-RSRP =RSRP Cell +10*log 10 (12*N RB )+G Band-DL-Norminal

[0088] Where: P Cell-RSRP is the downlink output power calculated based on RSRP; RSRP Cell is the RSRP value of the cell; N RB is the number of RBs in the source frequency band; G Band-DL-Norminal The nominal downstream gain of the device channel

[0089] get:

[0090] P Cell1-RSRP : Calculate the downlink output power of Cell 1 based on RSRP;

[0091] P Cell2-RSRP : Calculate the downlink output power of Cell 2 based on RSRP;

[0092] P Cell3-RSRP : Calculate the downlink output power of Cell 3 based on RSRP;

[0093] For example, N RB The corresponding relationship with BW is as follows:

[0094] LTE:

[0095] BW=10M,N RB =50

[0096] BW=15M,N RB =75

[0097] BW=20M,N RB =100

[0098] NR:

[0099] BW=25M,N RB =133

[0100] BW=30M,N RB =160

[0101] BW=50M,N RB =133

[0102] For example, the nominal downlink gain of each channel of a repeater is as follows:

[0103] G B3-dl-norminal=70

[0104] G B8-dl-norminal =65

[0105] G B39-dl-norminal =70

[0106] G B40-dl-norminal =70

[0107] Calculate the source score S Cell :

[0108] The score of each frequency band of the signal source is calculated according to the following formula:

[0109] S Cell =P Cell-RSRP -P Band-DL-Norminal

[0110] Among them, S Cell is the rating of the community; P Band-DL-Norminal The nominal downlink output power of the device channel

[0111] For example, the nominal downlink output power of each channel of a repeater is as follows:

[0112] P B3-DL-Norminal =17

[0113] P B8-DL-Norminal =17

[0114] P B39-DL-Norminal =17

[0115] P B40-DL-Norminal =17

[0116] get:

[0117] S Cell1 :Score of Cell 1

[0118] S Cell2 :Score of Cell 2

[0119] S Cell3 :Score of Cell 3

[0120] Select the best cell and judge S Cell ≥0:

[0121] Case 1: If only one cell meets the conditions, then that cell is selected.

[0122] Case 2: If there are two or more cells that meet the conditions, the cell with the larger SINR value is selected.

[0123] Case 3: If no cell meets the requirements, the cell with the higher RSRP value is selected. If the RSRP values are the same, the cell with the higher SINR value is selected.

[0124] Record the RSRP, SINR and S parameter values of the selected cell in frequency band B3 and obtain {RSRP B3 ,SINR B3 ,S B3}.

[0125] According to the above cell selection method, the remaining B8, B39 and B40 frequency bands are searched in turn, and the best cell is selected, resulting in:

[0126] {RSRP B3 ,SINR B3 ,S B3}

[0127] {RSRP B8 ,SINR B8 ,S B8}

[0128] {RSRP B39 ,SINR B39 ,S B39}

[0129] {RSRP B40 ,SINR B40 ,S B40}

[0130] 2. The frequency band selection method is as follows:

[0131] Get the RSRP, SINR, and S for frequency bands B3, B8, B39, and B40:

[0132] {RSRP B3 ,SINR B3 ,S B3}

[0133] {RSRP B8 ,SINR B8 ,S B8}

[0134] {RSRP B39 ,SINR B39 ,S B39}

[0135] {RSRP B40 ,SINR B40 ,S B40}

[0136] Determine the number of scores S≥0 for each frequency band, that is, determine S B3≥0?, S B3 ≥0?, S B3 ≥0?, S B3 ≥0? , then count the number.

[0137] Case 1: If only one frequency band meets the requirements, this frequency band is selected as the operating frequency band.

[0138] Case 2: If there are more than two frequency bands that meet the conditions, the frequency band corresponding to the larger SINR value is selected as the working frequency band. Furthermore, if the SINR values are the same, the working frequency band is selected according to the frequency band priority (for example, B3>B8>B39>B40).

[0139] Case 3: If no frequency band meets the conditions, the frequency band corresponding to the larger RSRP value is selected as the operating frequency band. Furthermore, if the RSRP values are the same, the frequency band corresponding to the larger SINR value is selected as the operating frequency band. If no selection is made, the frequency band priority is selected (for example, B3>B8>B39>B40).

[0140] Assuming that the frequency band selected in the previous step is B3, the multi-channel repeater will be switched to the channel corresponding to B3.

[0141] Then record the RSRP value of the B3 band, that is, RSRP Initial =RSRP B3 .

[0142] Therefore, the present invention provides a multi-channel repeater source selection and reselection method based on multiple indicators, which can comprehensively consider RSRP, SINR and frequency band priority, dynamically select the optimal source frequency band, and improve the network coverage capability, communication quality and resource utilization.

[0143] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0144] This document uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A multi-channel repeater source selection and reselection method based on multiple indicators, characterized in that: The following steps are involved: S1. Search each signal source frequency band for each cell and determine whether the network parameters of the current frequency band can be obtained. If so, calculate the theoretical downlink output power of the current frequency band. If not, continue searching. S2. Calculate a score for each cell using the theoretical downlink output power and the nominal downlink output power, and screen cells based on the scores to obtain a final selected cell. S3. Based on the final selected cell, obtain the reference signal received power, signal-to-noise ratio, and cell score of each frequency band, and perform frequency band selection to obtain an operating frequency band; S4. Switch the multi-channel repeater to the corresponding channel of the working frequency band to obtain the working channel, and record the initial reference signal received power of the working frequency band; S5, continuously monitoring the source network of the working channel to determine whether to perform network reselection, if so, return to step S1, if not, loop through step S5; S6. Regularly collect the reference signal received power of the working channel and determine whether to perform RSRP deterioration reselection. If so, return to step S1; if not, loop through step S6.

2. The multi-channel repeater signal source selection and reselection method based on multiple indicators according to claim 1, characterized in that: The network parameters include reference signal received power, signal-to-noise ratio, and bandwidth. The calculation expression for the theoretical downlink output power is: P RSRP =RSRP+10*log 10 (12*N RB )+G Band-DL-Norminal Among them, P RSRP is the downlink output power calculated based on the cell reference signal received power, RSRP is the cell reference signal received power, N RB is the number of RBs corresponding to the cell bandwidth, G Band-DL-Norminal It is the nominal downlink gain of the channel corresponding to this frequency band of the repeater.

3. The multi-channel repeater signal source selection and reselection method based on multiple indicators according to claim 2, characterized in that: The theoretical downlink output power and the nominal downlink output power are used to calculate the score of each cell, and based on the score of each cell, the cells are screened and recorded, including: The theoretical downlink output power and the nominal downlink output power are used to calculate the score of each cell. The calculation expression of the cell score is: S=P RSRP -P Band-DL-Norminal Among them, S is the score of each community, P Band-DL-Norminal The nominal downlink output power of the repeater corresponding to the channel in this frequency band; Filter cells with cell scores greater than or equal to 0 to obtain initially selected cells. When the number of initially selected cells is 1, set the initially selected cell as the final selected cell. When the number of initially selected cells is greater than or equal to 2, set the cell with the largest signal-to-noise ratio among the initially selected cells as the final selected cell. When the number of initially selected cells is 0, set the cell with the largest reference signal received power as the final selected cell, and record the reference signal received power, signal-to-noise ratio, and cell score of the final selected cell.

4. The multi-channel repeater signal source selection and reselection method based on multiple indicators according to claim 3, characterized in that: Based on the final selected cell, obtaining the reference signal received power, signal-to-noise ratio, and cell score of each frequency band, and performing frequency band selection to obtain an operating frequency band, including: Based on the final selected cell, obtaining the reference signal received power, signal-to-noise ratio, and cell score of each frequency band, and calculating the cell score of each frequency band; The frequency bands whose cell scores are greater than or equal to 0 are screened to obtain the initially selected frequency bands. When the number of the initially selected frequency bands is 1, the initially selected frequency band is set as the working frequency band. When the number of the initially selected cells is greater than or equal to 2, the frequency band with the largest signal-to-noise ratio in the initially selected frequency bands is set as the working frequency band. When the number of the initially selected frequency bands is 0, the frequency band with the largest reference signal received power is set as the working frequency band.

5. The method for selecting and reselecting a multi-channel repeater signal source based on multiple indicators according to claim 4, characterized in that: Continuously monitor the source network of the working channel to determine whether to perform network reselection. If so, return to step S1; if not, loop through step S5, including: S5-1, continuously monitoring the source network of the working channel to determine whether the source network is disconnected. If so, proceed to step S5-2; if not, proceed to step S5-1; S5-2. When the source network is disconnected, determine whether the uplink output power of other channels in the working frequency band is lower than a first preset threshold. If so, return to step S1; if not, return to step S5-1.

6. The method for selecting and reselecting a multi-channel repeater signal source based on multiple indicators according to claim 5, characterized in that: Periodically collect the reference signal received power of the working channel to determine whether to perform RSRP deterioration reselection. If so, return to step S1; if not, loop through step S6, including: S6-1. Periodically collect the reference signal received power of the working channel to obtain a reference signal received power detection value, and determine whether the difference between the initial reference signal received power and the reference signal received power detection value is greater than a preset deterioration threshold. If so, proceed to step S6-2; if not, continue to step S6-1. S6-2. When the difference between the initial reference signal received power and the reference signal received power detection value is greater than a preset deterioration threshold, obtain the current downlink output power of the working channel and determine whether the current downlink power is lower than a second preset threshold. If so, proceed to step S6-3; if not, continue to step S6-1. S6-3. When the current downlink power is lower than the second preset threshold, determine whether the uplink output power of other working channels in the working frequency band is lower than the third preset threshold. If so, return to step S1; if not, return to step S6-1.

Images