CN114554541A - Method and device for aligning air interfaces of different network coverage systems - Google Patents
Method and device for aligning air interfaces of different network coverage systems Download PDFInfo
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- CN114554541A CN114554541A CN202210167407.8A CN202210167407A CN114554541A CN 114554541 A CN114554541 A CN 114554541A CN 202210167407 A CN202210167407 A CN 202210167407A CN 114554541 A CN114554541 A CN 114554541A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0205—Traffic management, e.g. flow control or congestion control at the air interface
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0231—Traffic management, e.g. flow control or congestion control based on communication conditions
- H04W28/0236—Traffic management, e.g. flow control or congestion control based on communication conditions radio quality, e.g. interference, losses or delay
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to a method and a device for aligning air interfaces of different network coverage systems, wherein the method comprises the following steps: after knowing that a repeater system is hung down through the SCTP link, the base station advances the time delay of an air interface frame of the base station to a preset fixed time delay T0; the repeater system sets the actual time delay Yn of each RU as a difference value obtained by subtracting the predicted time delay Tn of the RU from the fixed time delay T0, so that each RU delays to transmit data according to the actual time delay Yn, and delays the RU frame starting point of each RU by the actual time delay Yn; the predicted time delay Tn is the data transmission time delay between AU and RU obtained by the repeater system in advance test. When the repeater system is hung below the base station, the base station air interface frame is set with a fixed time delay, and different actual time delays are set for different RUs according to the fixed time delay, so that the RUs air interface of each repeater system is aligned and reaches the fixed time delay, and the signal synchronization of the cell and the peripheral cells is ensured.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of wireless coverage of mobile communication base stations, in particular to a method and a device for aligning air interfaces of different network coverage systems.
[ background of the invention ]
The signal coverage of the mobile communication system has a plurality of modes, one mode is that the base station outputs radio frequency signals to directly cover, and the other mode is that the base station radio frequency signals are used as information sources, and relay equipment is used for expanding coverage, so that the cost performance of the whole coverage system is provided. By adopting a first direct signal coverage mode, the base station is synchronized by various modes such as GPS, 1588, air interface and the like, wireless signals of all cells in a coverage area are approximately and completely synchronized, and the problem of interference caused by time delay difference basically does not exist. The interference control, switching and connection delay indexes are good. When the second relay system signal coverage mode is adopted, there is optical fiber transmission delay due to the fact that the relay equipment (such as a repeater system) amplifies the signal again. If the transmission delay is not adjusted, the signals of the coverage system of the cell and the surrounding cells cannot be synchronized necessarily. The asynchronization can cause the phenomena of time delay interference in the overlapping coverage area of the cell and the surrounding base station, low switching success rate, large connection time delay and the like, the negative influence on a TD network system is more obvious, and the service experience and perception of a mobile user are influenced.
Therefore, it is desirable to provide a method and an apparatus for aligning RU air interfaces of a base station lower relay repeater system, so as to eliminate delay interference and synchronize signals of the cell with signals of surrounding cells.
[ summary of the invention ]
The technical problem to be solved by the present invention is to provide a method and a device for aligning air interfaces of different network coverage systems, which can set different delays for different RUs, so that signals of the cell and surrounding cells are synchronized.
In order to solve the above technical problem, the present invention provides a method for aligning air interfaces of different network coverage systems, which comprises the following steps:
after knowing that a repeater system is hung down through the SCTP link, the base station advances the time delay of an air interface frame of the base station to a preset fixed time delay T0;
the repeater system sets the actual time delay Yn of each RU as a difference value obtained by subtracting the predicted time delay Tn of the RU from the fixed time delay T0, so that each RU delays to transmit data according to the actual time delay Yn, and delays the RU frame starting point of each RU by the actual time delay Yn; the predicted time delay Tn is the data transmission time delay between AU and RU obtained by the repeater system in advance; n is a positive integer greater than 1.
Furthermore, the fixed time delay T0 is greater than the maximum data transmission time delay value of all repeater systems hung under the base station.
Furthermore, the maximum data transmission delay value of the repeater system is the maximum value of the predicted delay Tn.
Furthermore, the step of testing the repeater system in advance to obtain the predicted time delay Tn includes: and the AU sends a test pulse to the RU hung downwards once, acquires a response message returned after each RU receives the test pulse, calculates the time difference between the response message received by each RU and the test pulse, and sets one half of the time difference as the predicted time delay Tn of the RU.
In order to solve the technical problem, the invention also provides a device for aligning air interfaces of different network coverage systems, which comprises a base station and a repeater system connected with the base station;
after the base station learns that a repeater system is hung down through the SCTP link, the time delay of an air interface frame of the base station is advanced to a preset fixed time delay T0;
the repeater system sets the actual time delay Yn of each RU as a difference value obtained by subtracting the predicted time delay Tn of the RU from the fixed time delay T0, so that each RU delays transmission data according to the actual time delay Yn, and delays the RU frame starting point of each RU by the actual time delay Yn; the predicted time delay Tn is the data transmission time delay between AU and RU obtained by the repeater system in advance; n is a positive integer greater than 1.
Furthermore, the fixed time delay T0 is greater than the maximum data transmission time delay value of all repeater systems hung under the base station.
Furthermore, the maximum data transmission delay value of the repeater system is the maximum value of the predicted delay Tn.
Furthermore, the AU sends a test pulse to the RU hanging down once, obtains a response message returned by each RU after receiving the test pulse, calculates a time difference between receiving the response message of each RU and sending the test pulse, and sets one half of the time difference as the predicted time delay Tn of the RU.
Compared with the prior art, the invention has the following beneficial effects: when the repeater system is hung below the base station, the base station air interface frame is set with a fixed time delay, and different actual time delays are set for different RUs according to the fixed time delay, so that the RUs air interface of each repeater system is aligned and reaches the fixed time delay, and the signal synchronization of the cell and the peripheral cells is ensured.
[ description of the drawings ]
Fig. 1 is a flowchart of a method for aligning air interfaces of different network coverage systems according to an embodiment of the present invention;
FIG. 2 is a block diagram of a repeater system according to an embodiment of the present invention.
[ detailed description ] embodiments
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a method for aligning air interfaces of different network coverage systems according to an embodiment of the present invention includes:
after knowing that a repeater system is hung down through the SCTP link, the base station advances the time delay of an air interface frame of the base station to a preset fixed time delay T0;
the repeater system sets the actual delay Yn of each RU as the difference obtained by subtracting the predicted delay Tn of the RU from the fixed delay T0, enables each RU to delay transmission data according to the actual delay Yn, and delays the basic frame starting point of each RU by the actual delay Yn. The predicted time delay Tn is the data transmission time delay between AU and RU obtained by the repeater system in advance; n is a positive integer greater than 1.
In the embodiment of the invention, the fixed time delay T0 is greater than the maximum data transmission time delay value of all repeater systems hung under the base station. Specifically, the repeater system comprises a near-end unit AU and a remote unit RU, wherein the near-end unit AU is connected with a base station, and a plurality of remote units RU are hung below the near-end unit AU. Due to the optical fiber transmission delay and the device processing delay, there will be different delays for data transmission from AU to different RUs. In order to align the RU air interfaces of each repeater system, the time for transmitting data to each RU needs to be consistent, and therefore, a fixed time delay T0 needs to be set. T0 may be set to 50us, 55us or 60us, depending on the actual situation.
Specifically, as shown in fig. 2, the repeater system tests the obtained data transmission delay (i.e. predicted delay) from the AU to each RU in advance. The data transmission delay from AU to RU1 is T1, i.e., the predicted delay from RU1 is T1, the data transmission delay from AU to RU2 is T2, the data transmission delay from AU to RU3 is T3, and the data transmission delay from AU to RU4 is T4 … to AU RUn is Tn.
The difference between the fixed delay T0 and the predicted delay Tn for each RU is calculated as the actual delay Yn for each RU. Namely, the actual delay Y1 of RU1 is T0-T1; the actual delay Y2 of RU 2-T0-T2; the actual delay Y3 of RU 3-T0-T3; the actual delay Y4 of RU 4-T0-T4; RUn, the actual delay Yn is T0-Tn.
The repeater system controls the data processing chip of each RU to delay the distribution of data to Y1, Y2, Y3, Y4 … Yn, respectively. Meanwhile, the basic frame start point of each RU is delayed by a time of Y1, Y2, Y3, Y4 … Yn.
After setting, the time for transmitting data from the base station to each RU of each repeater system is T0, and each RU is aligned with an air interface. Meanwhile, in the direct signal coverage system under the base station except for the repeater system, because the base station sets the air interface frame delay to be the fixed delay T0, the data transmission of the direct signal coverage system is also the fixed delay T0, and the direct signal coverage system is kept synchronous with the repeater system. Therefore, the data of all network signal coverage systems under the base station are synchronous, and the influence on the service experience and perception of the mobile user caused by the asynchronous signals of the local cell and the surrounding cells is avoided.
In this embodiment, the step of testing in advance by the repeater system to obtain the predicted delay Tn of each RU includes:
s1, transmitting a test pulse to the RU hung downwards by the AU;
s2, each RU sends response message to AU after receiving test pulse;
s3 the AU takes the reply message returned by each RU and calculates the time difference between the receipt of the reply message and the sending of the test pulse, setting one half of the time difference as the predicted delay Tn for that RU.
Specifically, the AU sends a test pulse to one or more next RUs hung downwards, the RU returns a response message to the AU after receiving the test pulse, and if the RU is hung downwards with a next RU, the RU forwards the test pulse to the next RU. After receiving the test pulse, the next stage RU returns a response message to the AU through the previous stage RU; and the test pulse is received by each RU hung under the AU and a response message is returned.
And after the AU acquires the response message returned by the RU, calculating the time difference between the received response message of the RU and the first test pulse transmission, and setting one half of the time difference as the predicted time delay Tn of the RU.
The AU builds a configuration table in which the predicted delay Tn for each RU is stored. When the fixed time delay T0 is set in the base station air interface frame, the AU sets the actual time delay Yn of each RU according to the configuration table, so that the time delay from the AU to each RU reaches the fixed time delay T0.
In summary, when the repeater system is hung below the base station in the embodiment of the present invention, a fixed time delay is set for the air interface frame of the base station, and different actual time delays are set for different RUs according to the fixed time delay, so that the RU air interface of each repeater system is aligned and reaches the fixed time delay, thereby ensuring that the signal synchronization between the cell and the surrounding cells is ensured.
The above examples merely represent preferred embodiments of the present invention, which are described in more detail and detail, but are not to be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make several variations and modifications, such as combinations of different features in the various embodiments, without departing from the inventive concept, which fall within the scope of the present invention.
Claims (8)
1. A method for aligning air interfaces of different network coverage systems is characterized by comprising the following steps:
after knowing that a repeater system is hung down through the SCTP link, the base station advances the time delay of an air interface frame of the base station to a preset fixed time delay T0;
the repeater system sets the actual time delay Yn of each RU as a difference value obtained by subtracting the predicted time delay Tn of the RU from the fixed time delay T0, so that each RU delays to transmit data according to the actual time delay Yn, and delays the RU frame starting point of each RU by the actual time delay Yn; the predicted time delay Tn is the data transmission time delay between AU and RU obtained by the repeater system in advance; n is a positive integer greater than 1.
2. The method according to claim 1, wherein the fixed delay T0 is greater than a maximum data transmission delay value of all repeater systems under the base station.
3. The method according to claim 2, wherein the maximum data transmission delay value of the repeater system is the maximum value of the predicted delays Tn.
4. The method of claim 1, wherein the step of the repeater system testing in advance to obtain the predicted delay Tn comprises: and the AU sends a test pulse to the RU hung downwards once, acquires a response message returned by each RU after receiving the test pulse, calculates the time difference between the response message received by each RU and the test pulse, and sets one half of the time difference as the predicted time delay Tn of the RU.
5. A device for aligning air interfaces of different network coverage systems is characterized by comprising a base station and a repeater system connected with the base station;
after the base station learns that a repeater system is hung down through the SCTP link, the time delay of an air interface frame of the base station is advanced to a preset fixed time delay T0;
the repeater system sets the actual time delay Yn of each RU as a difference value obtained by subtracting the predicted time delay Tn of the RU from the fixed time delay T0, so that each RU delays transmission data according to the actual time delay Yn, and delays the RU frame starting point of each RU by the actual time delay Yn; the predicted time delay Tn is the data transmission time delay between AU and RU obtained by the repeater system in advance; n is a positive integer greater than 1.
6. The apparatus of claim 5, wherein the fixed delay T0 is greater than the maximum data transmission delay value of all repeater systems under the base station.
7. The apparatus of claim 6, wherein the maximum data transmission delay value of the repeater system is the maximum value of the predicted delays Tn.
8. The apparatus for air interface alignment of different network coverage systems according to claim 5, wherein the AU sends a test pulse to the RU hanging downward once, obtains a response message returned after each RU receives the test pulse, calculates a time difference between receiving the response message of each RU and sending the test pulse, and sets one half of the time difference as the predicted delay Tn of the RU.
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| CN202210167407.8A CN114554541A (en) | 2022-02-23 | 2022-02-23 | Method and device for aligning air interfaces of different network coverage systems |
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| CN202210167407.8A CN114554541A (en) | 2022-02-23 | 2022-02-23 | Method and device for aligning air interfaces of different network coverage systems |
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