TWI648998B - Method for pre-emptiing the wireless resource, wireless communication system and radio acess node - Google Patents

Abstract

The disclosure provides a method for preempting a wireless resource. The wireless resource preemption method is applicable to a wireless communication system, including: transmitting, by a plurality of user equipments in a first network, a measurement report to a wireless access node, where the first network is provided by the wireless access node; Determining a priority level of the user bearer corresponding to each user equipment, selecting a plurality of candidate user bearers from all user bearers; determining whether each candidate user bearer corresponds to a user equipment that can be connected to other heterogeneous networks; The measurement report of the user equipment of other heterogeneous networks selects one of the candidate user bearers of the user equipment that can be connected to other heterogeneous networks to perform preemption.

Description

Wireless resource preemption method, wireless communication system, and wireless connection Ingress node

The disclosure is mainly related to a radio resource preemption technology, in particular to a radio resource preemption technique for determining whether a user bearer with a low priority level can be connected to other heterogeneous networks to determine the user bearer to be preempted.

As the mobile communication network continues to evolve, how to fully use spectrum resources and achieve interoperability between different wireless technologies to make the future wireless network environment more diverse will be the key project of mobile communication network development. .

In order to enable Long Term Evolution (LTE) to operate in the Unlicensed Band, LTE-U, Licensed Assisted Access (LAA), MulteFire and other related technologies are not authorized. It has matured and has been officially launched in some countries. In addition, the concept of shared spectrum access (Licensed Shared Access (LSA)/Citizens Broadband Radio Service (CBRS) shared spectrum operating at 2.3/3.5 GHz can also be applied to LTE networks.

As more and more terminal devices connect to the Internet, wireless resources may be exhausted. Therefore, according to the 3GPP standard, a radio access node may perform a preemption procedure according to an ARP (Allocation and Retention Priority) parameter to release a radio resource of a lower priority user bearer (UE bearer). High priority users are used for hosting.

Under the current existing mechanism, when a wireless access node performs a preemption procedure due to insufficient radio resources, a low priority user bearer is selected and its radio resources are released to provide services for high priority user bearers. However, users with low priority who are preempted by resources may not be able to access the Internet because they cannot connect to other wireless heterogeneous networks. As a result, the quality of service is degraded.

In view of the above prior art problems, the present disclosure provides a wireless resource preemption method and wireless method for determining whether a user bearer (Radio Bearer) having a low priority level can be connected to other heterogeneous networks to determine a user to be preempted. Communication system.

According to an embodiment of the disclosure, a radio resource preemption method is provided. The wireless resource preemption method is applicable to a wireless communication system, and includes: transmitting, by a plurality of user equipments in a first network, a measurement report to a wireless access node, wherein the first network is connected by the wireless connection Providing, by the ingress node, selecting a plurality of candidate user bearers from all the user bearers according to a priority level of the user bearer corresponding to each of the user equipments; determining whether the user equipment corresponding to each of the candidate user bearers is connectable to Other heterogeneous networks; and selecting one of the candidate user bearers of the user equipment that can be connected to other heterogeneous networks to perform preemption according to the above measurement report of the user equipment that can be connected to other heterogeneous networks.

According to an embodiment of the disclosure, a radio resource preemption method is provided. The foregoing radio resource preemption method is applicable to a radio access node, and includes: receiving a measurement report provided by a plurality of user equipments in a first network, where the first network is provided by the radio access node; a priority level of the user bearer corresponding to the user equipment, selecting a plurality of candidate user bearers from all the user bearers; determining whether the user equipment corresponding to each of the candidate user bearers can be connected to another heterogeneous network; The foregoing measurement report of the user equipment that can be connected to other heterogeneous networks selects one of the candidate user bearers of the user equipment that can be connected to other heterogeneous networks to perform preemption.

A wireless communication system is provided in accordance with an embodiment of the present disclosure. The wireless communication system includes a plurality of user equipments and a wireless access node. The wireless access node provides a first network to the plurality of user equipments, and receives the measurement reports transmitted by the plurality of user equipments, and from all the user bearers according to the priority level of the user bearers corresponding to each of the user equipments. , select multiple candidate user bearers. The wireless access node determines whether the user equipment corresponding to each of the candidate user bearers can be connected to another heterogeneous network, and the wireless access node performs the foregoing measurement report according to the user equipment that can be connected to other heterogeneous networks. Select one of the above-mentioned candidate user bearers that can connect to the above-mentioned user equipment of other heterogeneous networks to perform the grab

A wireless access node is provided in accordance with an embodiment of the present disclosure. The wireless access node includes a transceiver device and a processing device. The transceiver device provides a first network to the plurality of user equipments, and receives measurement reports provided by each of the user equipments. The processing device selects a plurality of candidate user bearers from all the user bearers according to a priority level of the user bearer corresponding to each of the user equipments. The processing device determines whether the user equipment corresponding to each of the candidate user bearers can be connected to another heterogeneous network, and the processing device selects to connect to the measurement report according to the user equipment that can be connected to other heterogeneous networks. One of the above-mentioned candidate user bearers of the above-mentioned user equipments of other heterogeneous networks performs preemption.

With regard to the other features and advantages of the disclosure, those skilled in the art can make a slight difference in the wireless resource preemption method and the wireless communication system disclosed in the implementation method of the present invention without departing from the spirit and scope of the disclosure. Changed and retouched.

100‧‧‧Wireless communication system

110‧‧‧First wireless access node

111‧‧‧Transceiver

112‧‧‧Processing device

120-1, 120-2, 120-3, 120-4‧‧‧ User equipment

130‧‧‧Second wireless access node

140‧‧‧ Third wireless access node

S310~S350, S351~S356, S510~S550‧‧‧ steps

1 is a block diagram showing a wireless communication system in accordance with an embodiment of the present disclosure.

2 is a block diagram showing a first wireless access node according to an embodiment of the present disclosure.

FIG. 3 is a flowchart of a method for preempting a radio resource according to an embodiment of the disclosure.

4A-4B is a flowchart of a method for preempting a radio resource according to an embodiment of the disclosure.

FIG. 5 is a flowchart of a method for preempting a radio resource according to an embodiment of the disclosure.

The present invention is described in the following paragraphs, and is intended to be illustrative of the scope of the disclosure, and is not intended to limit the scope of the disclosure. The scope of the disclosure is defined by the scope of the appended claims. .

1 is a block diagram showing a wireless communication system 100 in accordance with an embodiment of the present disclosure. As shown in FIG. 1, the wireless communication system 100 can include a first radio access node (RAN) 110, a plurality of user equipments 120-1, 120-2, 120-3, and 120-4. A second wireless access node 130 and a third wireless access node 140. It is noted that the block diagram in FIG. 1 is for convenience of description of the embodiments of the present disclosure, but the disclosure is not limited thereto.

2 is a block diagram showing a first wireless access node 110 in accordance with an embodiment of the present disclosure. According to an embodiment of the disclosure, the first wireless access node 110 may be a macro eNB, but the disclosure is not limited thereto. As shown in FIG. 2, the wireless access node 110 can include a transceiver 111 and a processing device 112. It is noted that the block diagram in FIG. 2 is only for convenience of description of the embodiments of the present disclosure, but the disclosure is not limited thereto.

According to an embodiment of the present disclosure, the transceiver 111 can be used to provide a first network (eg, an LTE network) to the plurality of user equipments 120-1, 120-2, 120-3, and 120-4, and to receive a plurality of users. Devices 120-1, 120-2, 120-3 And the measurement report provided by 120-4. In accordance with an embodiment of the present disclosure, processing device 112 may be utilized to perform related operations when wireless access node 110 performs a pre-emption procedure. According to an embodiment of the present disclosure, the measurement report provided by each user equipment includes a network type, a wireless access node identifier, and a signal strength of all networks to which it can connect.

According to an embodiment of the disclosure, the second wireless access node 130 may be a small cell, but the disclosure is not limited thereto. The second wireless access node 130 can be used to provide a second network (e.g., an EUTRA network) for access by the user equipment 120-2.

According to an embodiment of the disclosure, the third wireless access node 140 may be a Wi-Fi access point (AP), but the disclosure is not limited thereto. The third wireless access node 140 can be used to provide a third network (eg, a WLAN network) for access by the user equipment 120-3.

In addition, it is noted that the coverage of the heterogeneous network (eg, the network provided by the second wireless access node 130 and the third wireless access node 140) in the embodiments of the present disclosure may be smaller than the first The coverage of the network provided by the wireless access node 110.

According to some embodiments of the present disclosure, the user equipment may also be in the coverage of multiple heterogeneous networks at the same time. For example, the user equipment can be in the coverage of the third network provided by the second wireless access node 130 and the third network provided by the third wireless access node 140.

According to an embodiment of the present disclosure, the user equipments 120-1, 120-2, 120-3, and 120-4 measure the network environment in which they are currently located, and provide a measurement report to the first wireless access. Node 110. In this disclosure In the embodiment of the disclosure, the measurement report of each user equipment may include information related to other heterogeneous networks. The first wireless access node 110 can know whether the user equipment is located under the coverage of other heterogeneous networks and related information of the user equipment and other heterogeneous networks according to the measurement report provided by the user equipment. For example, the first wireless access node 110 can know that the user equipment 120-2 is also provided by the second wireless access node 130 according to the measurement report provided by the user equipment 120-2 (for example: Under the coverage of the EUTRA network, the cell identification (Cell ID) of the user equipment 120-2 in the second network and the Reference Signal Received Power (RSRP) are known. The first wireless access node 110 can know that the user equipment 120-3 is also provided by the third wireless access node 140 on the third network (eg, WLAN network) according to the measurement report provided by the user equipment 120-3. Under the coverage, the Service Set Identifier (SSID) of the user equipment 120-3 in the third network and the Received Signal Strength Indication (RSSI) can be known.

According to an embodiment of the present disclosure, different bearers (UE bearers) may have different priorities according to Allocation and Retention Priority (ARP). The allocation and retention priorities are defined in the 3GPP standard and are included in the Quality of Service (QoS) parameters. The allocation and retention priorities are used to define the priorities of different user bearers, and they include three parameters: Priority Level, Pre-emption capability, and Pre-emption vulnerability.

The priority level defines the superiority from high priority to low priority. The weight level is 0~15. As shown in FIG. 1 , it can be assumed that the priority level corresponding to the user bearer of the user equipment 120-1 is 6, the priority level of the user bearer of the user equipment 120-2 is 9, and the user equipment of the user equipment 120-3 is carried. The corresponding priority level is 10, and the priority level of the user bearer corresponding to the user equipment 120-4 is 11. The preemption capability is used to determine whether a user bearer with a lower priority level should be preempted to release the required resources. Taking the first picture as an example, when the preemption capability of the user equipment of the user equipment 120-1 is set to TRUE, it means that the user equipment 120-1 should preempt the user bearer with the lower priority level. The preemptive capability is used to determine whether the user bearer is easily preempted by a user with a higher priority level and having preemptive capability. As shown in FIG. 1 , when the preemption capability of the user equipment of the user equipment 120-2 is set to TRUE, it indicates that the user equipment 120-2 is easily preempted by a user with a higher priority level and having preemptive capability.

In the conventional preemption technique, a wireless access node (for example, the wireless access node 110) releases an unlimited resource carried by a user with a low priority level according to an allocation and retention priority parameter, and gives a higher priority level. User hosting is used. However, in the embodiment of the disclosure, the wireless access node further considers whether the user equipment of the user with the lower priority level is under the coverage of at least one other heterogeneous network to determine whether to preempt. . The examples below will be described in more detail.

According to some embodiments of the present disclosure, the "preemption program is triggered" in the disclosure indicates that when a user equipment having a high priority level (for example, user equipment 120-1) wants to establish a radio bearer in the first network ( Radio bearer), and when the wireless resources of the first network are insufficient, the preemption program will be triggered to provide The radio resource is given to the user equipment of the high priority level. According to other embodiments of the present disclosure, the "preemption program is triggered" according to the disclosure means that when a user equipment (eg, user equipment 120-1) having a high priority level in one of the first networks is directed to the first When the wireless access node 110 requires more radio resources, and the radio resources of the first network are insufficient, the preemption procedure is triggered to provide more radio resources to the user equipment of the high priority level.

According to an embodiment of the present disclosure, as shown in FIG. 1, when the preemption program is triggered (for example, the user equipment 120-1 having a high priority level wants to establish a radio bearer in the first network, and the first network The wireless access node 110 first determines whether the user equipments 120-2, 120-3, and 120-4 corresponding to the users with lower priority levels are under the coverage of other heterogeneous networks. . Then, the first wireless access node 110 selects one of the user bearers corresponding to the user equipments 120-2 and 120-3 under the coverage of other heterogeneous networks as the object of preemption. Although the user equipment 120-4 has the lowest priority level, since it does not have coverage in other heterogeneous networks, the first wireless access node 110 is selected when a user bearer with a lower priority level is selected to perform preemption. Will be excluded first.

According to some embodiments of the present disclosure, the wireless access node 110 first selects a plurality of user bearers having the lowest priority level in the first network as the plurality of candidate user bearers when the preemption program is used. For example, if the lowest priority level of the user bearer in the first network is 11, the wireless access node 110 first selects the plurality of user bearers having the lowest priority level 11 in the first network as the preemption procedure. Multiple candidate user bearers.

According to further embodiments of the present disclosure, the wireless access node 110 In addition, the user bearer corresponding to a lowest priority range in the first network is selected as the candidate candidate user bearer when the preemption program is used. For example, if the lowest priority range is the corresponding priority level 10~15, the wireless access node 110 first selects the user bearer of the corresponding priority level 10~15 in the first network as the candidate candidate when the preemption program is used. Hosted.

According to an embodiment of the present disclosure, when the preemption program is triggered (for example, the user equipment 120-1 having a high priority level wants to establish a radio bearer in the first network, and the radio resources of the first network are insufficient), A wireless access node 110 determines whether each candidate user bears a corresponding user equipment under the coverage of other heterogeneous networks. Then, the first wireless access node 110 selects one of the user bearers of the user equipment corresponding to the coverage of other heterogeneous networks as the object of preemption.

According to an embodiment of the disclosure, in the candidate user bearer of the user equipment corresponding to the coverage of the other heterogeneous network, the first radio access node 110 further determines that each of the connectable to the second network (for example: Whether the first signal strength (for example, RSRP) of the user equipment of the EUTRA network provided by the small cell and the second network is greater than a first threshold (for example: -90 dBm, but the disclosure is not limited thereto). Then, the first radio access node 110 selects one of the candidate user bearers of the user equipment corresponding to the first signal strength greater than the first threshold as the preemption object.

If the first signal strength (eg, RSRP) of each of the user equipment and the second network connectable to the second network (eg, the EUTRA network provided by the small cell) is not greater than a first threshold, the first The wireless access node 110 further determines that each can connect to the third network (for example, the WLAN provided by the Wi-Fi access point). Whether the second signal strength (for example, RSSI) of the user equipment of the network and the third network is greater than a second threshold (for example: -70 dBm, but the disclosure is not limited thereto). Then, the first radio access node 110 selects one of the candidate user bearers of the user equipment corresponding to the second signal strength greater than the second threshold as the preemption object. If the second signal strength (for example, RSSI) of each user equipment and the third network connectable to the third network (for example, the WLAN network provided by the Wi-Fi access point) is not greater than the second threshold The first radio access node 110 randomly selects one of the plurality of candidate user bearers as the preemption object.

For example, the Cell Radio Network Temporary Identifier (C-RNTI) of the user equipment carried by the candidate user is 0001, 0002, 0003, and 0004. According to Table 1, user equipments 0002 and 0004 are in the coverage of the EUTRA network provided by the small cells, and user equipments 0003 and 0004 are in the coverage of the WLAN network provided by the Wi-Fi access point. In addition, since the user equipment 0001 is not in the coverage of other heterogeneous networks, when the first radio access node 110 selects a user bearer with a lower priority level to perform preemption, the first radio access node 110 will first exclude user equipment 0001. According to the above embodiment, the first wireless access node 110 first determines each of the user equipment and the second network first signal strength (RSRP) connectable to the second network (the EUTRA network provided by the small cell). Whether it is greater than a first critical value (for example: -90dBm). When the first radio access node 110 determines whether the RSRPs of the user equipments 0002 and 0004 connectable to the second network and the second network are greater than the first threshold, since only the RSRP of the user equipment 0002 is greater than -90 dBm, The first wireless access node 110 selects the user The user of device 0002 is hosted as a preemption object.

According to an embodiment of the present disclosure, when one of the candidate user bearers is subjected to preemption, the first wireless access node 110 may assist the user equipment carried by the preempted candidate user to connect to its corresponding heterogeneous network. Taking the first picture as an example, if the first radio access node 110 selects the user bearer of the user equipment 120-2 as the preemption object, the first radio access node 110 assists the user equipment 120-2 to connect to the device. The second network provided by the second wireless access node 130.

FIG. 3 is a flowchart of a method for preempting a radio resource according to an embodiment of the disclosure. The wireless resource preemption method is applicable to a wireless communication system (for example, the wireless communication system 100), wherein the wireless communication system includes a Wireless access nodes, as well as multiple user devices. As shown in FIG. 3, in step S310, a plurality of user equipments in a first network transmit their measurement reports to a wireless access node, wherein the first network is provided by the wireless access node. In step S320, the radio access node selects a plurality of candidate user bearers from all user bearers according to the priority level of the user bearer corresponding to each user equipment. In step S330, when a preemption procedure is triggered, the wireless access node determines whether the user equipment corresponding to each candidate user bearer can connect to other heterogeneous networks, and determines whether there is a user connectable to other heterogeneous networks. device. If the user equipment corresponding to each candidate user bearer cannot connect to other heterogeneous networks, step S340 is performed. In step S340, the radio access node selects one of all candidate user bearers to perform preemption. If one or more of the user equipments corresponding to the candidate user bearers can be connected to other heterogeneous networks, step S350 is performed. In step S350, the wireless access node determines whether to perform preemption on one of the candidate user bearers corresponding to the user equipment connectable to the other heterogeneous network according to the measurement report of the user equipment connectable to the other heterogeneous network.

According to some embodiments of the present disclosure, in step S320, the wireless access node selects the user bearer with the lowest priority level from all the user bearers according to the priority level of the user bearer corresponding to each user equipment, or selects A user bearer of a lowest priority range is carried as the above-mentioned plural candidate user.

4A-4B is a flow chart of step S350 according to an embodiment of the present disclosure. As shown in FIG. 4A-4B, in step S351, the wireless access node determines each connectable according to a measurement report of the user equipment connectable to a second network (for example, the EUTRA network provided by the small cell). To the second Whether a first signal strength (for example, RSRP) between the user equipment of the network and the second network is greater than a first threshold. If there is a user equipment whose first signal strength is greater than the first threshold, step S352 is performed. In step S352, the wireless access node selects one from the user equipment whose first signal strength is greater than the first threshold to perform preemption. When the first signal strength between each user equipment connectable to the second network and the second network is not greater than the first threshold, step S353 is performed. In step S353, the wireless access node determines that each connection to the third network is based on a measurement report of the user equipment that can be connected to a third network (for example, a WLAN network provided by the Wi-Fi access point). Whether a second signal strength (eg, RSSI) between the user equipment and the third network is greater than a second threshold.

If there is a user equipment whose second signal strength is greater than the second threshold, step S354 is performed. In step S354, the wireless access node selects one from the user equipment whose second signal strength is greater than the second threshold to perform preemption. If the strength of the second signal between the user equipment connectable to the third network and the third network is not greater than the second threshold, step S355 is performed. In step S355, the radio access node selects one of all candidate user bearers to perform preemption.

In step S356, the wireless access node assists the user equipment corresponding to the candidate bearer that is performing the preemption to connect to its corresponding heterogeneous network.

FIG. 5 is a flowchart of a method for preempting a radio resource according to an embodiment of the disclosure. This radio resource preemption method is applicable to a radio access node (e.g., radio access node 110). As shown in FIG. 5, in step S510, the wireless access node 110 receives a measurement report provided by a plurality of user equipments in a first network, wherein the first network is provided by the wireless access node 110. In step S520, the wireless access node 110 corresponds to each user equipment. The priority level of the user bearer, and from all user bearers, multiple candidate user bearers are selected. In step S530, when a preemption procedure is triggered, the wireless access node 110 determines whether the user equipment corresponding to each candidate user bearer can connect to other heterogeneous networks, and determines whether there is a connection to other heterogeneous networks. User equipment. If the user equipment corresponding to each candidate user bearer cannot connect to other heterogeneous networks, step S540 is performed. In step S540, the radio access node 110 selects one of all candidate user bearers to perform preemption. If one or more of the user equipments corresponding to the candidate user bearers can be connected to other heterogeneous networks, step S550 is performed. In step S550, the wireless access node 110 determines whether to perform preemption on one of the candidate user bearers corresponding to the user equipment connectable to the other heterogeneous network according to the measurement report of the user equipment connectable to the other heterogeneous network.

In the traditional preemption mechanism, the radio access node (for example, the radio access node 110) only releases the radio resources carried by the user with the low priority level according to the allocation and retention priority parameters, and gives the higher priority. The user of the level is used by the bearer. However, in the wireless resource preemption method proposed by the present disclosure, the wireless access node further considers whether the user equipment with the user with the lower priority level is in the coverage of at least one other heterogeneous network. Decide whether to preempt. Therefore, users with low priority who can avoid resource preemption cannot continue to access the Internet because they cannot connect to other wireless heterogeneous networks.

The serial numbers in the specification and the scope of the patent application, such as "first", "second", "third", etc., are merely for convenience of explanation, and there is no sequential relationship between them.

The method and algorithm disclosed in the specification of the present disclosure can be directly configured by a call processing device to be executed by at least one processor, and directly applied to a hardware and a software module or a combination of the two. A software module (including execution instructions and related data) and other data can be stored in the data memory, such as random access memory (RAM), flash memory, read only memory (ROM) Can erase erasable read-only memory (EPROM), electronic erasable programmable read-only memory (EEPROM), scratchpad, hard disk, portable disk, CD-ROM (CD- ROM), DVD or any other computer readable storage media format in the art. A storage medium can be coupled to a machine device, such as a computer/processor (for convenience of description, represented by a processor in the present specification), the processor can read information through a storage medium (such as Is the code) and writes information to the storage medium. A storage medium can integrate a processor. A special application integrated circuit (ASIC) can include a processor and a storage medium. A user equipment may include a special application integrated circuit. In other words, the processor and the storage medium are included in the user equipment in a manner that is not directly connected to the user equipment. Moreover, in some embodiments, any product suitable for a computer program includes a readable storage medium, wherein the readable storage medium includes code associated with one or more of the disclosed embodiments. In some embodiments, the product of the computer program can include packaging materials.

The above paragraphs are described in various levels. Obviously, the teachings herein can be implemented in a variety of ways, and any particular architecture or function disclosed in the examples is merely representative. In light of the teachings herein, it will be understood by those skilled in the art that the various aspects disclosed herein can be implemented independently or two or more layers can be combined.

The disclosure has been disclosed in the above embodiments, but it is not intended to limit the disclosure. Any one skilled in the art can make some modifications and refinements without departing from the spirit and scope of the disclosure. This is subject to the definition of the scope of the patent application.

Claims (28)

A wireless resource preemption method, applicable to a wireless communication system, comprising: transmitting a measurement report to a wireless access node by a plurality of user equipments in a first network, wherein the first network is connected by the wireless access Providing a plurality of candidate user bearers from all the user bearers according to a priority level of the user bearer corresponding to each of the user equipments; determining, according to the measurement report of the user equipment corresponding to each of the candidate user bearers, Whether the user equipment corresponding to the candidate user bearer can be connected to other heterogeneous networks; and selecting one of the candidate user bearers of the user equipment that can be connected to other heterogeneous networks to perform preemption. The method for preempting the radio resource according to claim 1, further comprising: selecting, according to a priority level of the user bearer corresponding to each of the user equipments, the user bearer with the lowest priority level from all the user bearers. Or selecting the above-mentioned user bearer whose priority level is in a lowest priority range as the above-mentioned plural candidate user bearer. The radio resource preemption method of claim 1, wherein the foregoing measurement report of each of the user equipments includes a network type, a radio access node identifier, and a signal strength of all networks to which the user equipment can be connected. . The radio resource preemption method of claim 1, further comprising: determining, according to the measurement report of the user equipment corresponding to the candidate user bearer, that each of the candidate user bearers connected to a second network corresponds to Whether a first signal strength between the user equipment and the second network is greater than a first threshold; and when there is a user equipment corresponding to the candidate user bearer whose first signal strength is greater than the first threshold, Selecting one of the user equipments whose first signal strength is greater than the first threshold value to perform preemption. The method for preempting the radio resource according to claim 4, further comprising: the first step between the user equipment corresponding to the candidate user bearer connected to the second network and the second network When the signal strength is not greater than the first threshold, determining, according to the measurement report of the user equipment corresponding to the candidate user bearer connected to a third network, each candidate user connectable to the third network Whether a second signal strength between the user equipment corresponding to the bearer and the third network is greater than a second threshold; and the user corresponding to the candidate user bearer having the second signal strength greater than the second threshold In the device, one of the user equipments whose second signal strength is greater than the second threshold is selected to perform preemption. For example, the wireless resource preemption method described in claim 5 of the patent scope is further included. Included: when each of the second signal strengths between the user equipment corresponding to the candidate user bearer connected to the third network and the third network is not greater than the second threshold, The user bearer selects one to perform preemption. The radio resource preemption method of claim 1, further comprising: when the one of the candidate user bearers is preempted by the wireless access node, assisting the candidate user to be preempted by the preemption User equipment, connected to its corresponding heterogeneous network. A radio resource preemption method, applicable to a radio access node, comprising: receiving a measurement report provided by a plurality of user equipments in a first network, wherein the first network is provided by the radio access node; Determining, by the user equipment, a priority level of the user equipment, selecting a plurality of candidate user bearers from all the user bearers; determining whether the user equipment corresponding to each of the candidate user bearers can be connected to another heterogeneous network; The foregoing measurement report of the user equipment connected to the other heterogeneous network selects one of the candidate user bearers that can be connected to the user equipment of the other heterogeneous network to perform preemption. For example, the method for preempting radio resources according to item 8 of the patent application scope includes: Determining, according to a priority level of the user bearer corresponding to each user equipment, the user bearer having the lowest priority level, or selecting the user bearer in a lowest priority range as the above-mentioned plural candidate User bearer. The radio resource preemption method of claim 8, wherein the foregoing measurement report of each of the user equipments includes a network type, a radio access node identifier, and a signal strength of all networks to which the user equipment can be connected. . The method for preempting the radio resource as described in claim 8 further includes: determining, according to the measurement report of the user equipment corresponding to the candidate user bearer, the user equipment that is connectable to a second network, and the foregoing Whether a first signal strength between the two networks is greater than a first threshold; and when the user equipment corresponding to the candidate user bearer having the first signal strength greater than the first threshold is selected, the foregoing A user equipment whose signal strength is greater than the first threshold value described above is used to perform preemption. The radio resource preemption method of claim 11, further comprising: the first step between the user equipment corresponding to each candidate user bearer connected to the second network and the second network When the signal strength is not greater than the first threshold, determining that each connection is possible according to a measurement report of the user equipment corresponding to the candidate user bearer that can be connected to a third network. Whether a second signal strength between the user equipment corresponding to the candidate user bearer corresponding to the third network and the third network is greater than a second threshold; and when the second signal strength is greater than the second threshold When the value of the candidate user carries the user equipment corresponding to the user equipment, one of the user equipments whose second signal strength is greater than the second threshold is selected to perform preemption. The method for preempting the radio resource according to claim 12, further comprising: the second device between the user equipment corresponding to the candidate user bearer connected to the third network and the third network When the signal strength is not greater than the second threshold, one of the candidate user bearers is selected to perform preemption. The radio resource preemption method of claim 8, further comprising: when the one of the candidate user bearers is preempted by the wireless access node, assisting the candidate user to be preempted by the preemption User equipment, connected to its corresponding heterogeneous network. A wireless communication system, comprising: a plurality of user equipments; and a wireless access node, providing a first network to the plurality of user equipments, and receiving measurement reports transmitted by the plurality of user equipments, and corresponding to each of the user equipments User-prioritized priority level, from all In the user bearer, a plurality of candidate user bearers are selected, wherein the wireless access node determines whether the user equipment corresponding to each of the candidate user bearers can be connected to another heterogeneous network, and the wireless access node is connectable to other The foregoing measurement report of the user equipment of the heterogeneous network selects one of the candidate user bearers that can be connected to the user equipment of the other heterogeneous network to perform preemption. The wireless communication system of claim 15, wherein the wireless access node selects the lowest priority level from all of the user bearers according to a priority level of a user bearer corresponding to each of the user equipments. The user bears, or selects the above-mentioned user bearer in a lowest priority range as the above-mentioned plural candidate user bearer. The wireless communication system of claim 15, wherein the measurement report of each of the user equipments includes a network type, a wireless access node identifier, and a signal strength of all networks to which the user equipment can be connected. The wireless communication system of claim 15, wherein the wireless access node determines, according to the measurement report of the user equipment corresponding to the candidate user bearer, the user equipment that can be connected to a second network and Whether the first signal strength between the second network is greater than a first threshold, and wherein the wireless device is connected to the user equipment corresponding to the candidate user bearer whose first signal strength is greater than the first threshold The ingress node sets the user whose first signal strength is greater than the first threshold value Select one of the preparations to perform preemption. The wireless communication system of claim 18, wherein the first signal strength between the user equipment corresponding to the candidate user bearer connected to the second network and the second network is When not greater than the first threshold, the wireless access node determines, according to the measurement report of the user equipment corresponding to the candidate user bearer that can be connected to a third network, each of the foregoing connections to the third network. Whether the second signal strength between the user equipment corresponding to the candidate user bearer and the third network is greater than a second threshold, and wherein the candidate user bearer is located when the second signal strength is greater than the second threshold And corresponding to the user equipment, the wireless access node selects one of the user equipments whose second signal strength is greater than the second threshold to perform preemption. The wireless communication system of claim 19, wherein the second signal strength between the user equipment corresponding to the candidate user bearer connected to the third network and the third network is When not greater than the second threshold, the wireless access node selects one of all the candidate user bearers to perform preemption. The wireless communication system of claim 15, wherein when the one of the candidate user bearers is preempted, the wireless access node assists the user equipment corresponding to the candidate user being preempted by the preemption, and is connected to It corresponds to a heterogeneous network. A wireless access node includes: a transceiver device, providing a first network to a plurality of user equipments, and receiving a measurement report provided by each of the user equipments; and a processing device, according to a priority level of the user bearer corresponding to each of the user equipments, from all the above In the user bearer, the plurality of candidate user bearers are selected, wherein the processing device determines whether the user equipment corresponding to each of the candidate user bearers can be connected to another heterogeneous network, and the processing device is configured according to the foregoing connectable to other heterogeneous networks. The foregoing measurement report of the user equipment selects one of the candidate user bearers of the user equipment that can be connected to other heterogeneous networks to perform preemption. The wireless access node of claim 22, wherein the processing device selects the user having the lowest priority level from all the user bearers according to a priority level of the user bearer corresponding to each of the user equipments. Carrying, or selecting the above-mentioned user bearer in a lowest priority range, as the above-mentioned plural candidate user bearer. The wireless access node of claim 22, wherein the foregoing measurement report of each of the user equipments includes a network type, a wireless access node identifier, and a signal strength of all networks to which the user equipment can be connected. . The wireless access node according to claim 22, wherein the processing device determines, according to the measurement report of the user equipment corresponding to the candidate user bearer, the user equipment that can be connected to a second network and the foregoing Whether a first signal strength between the second networks is greater than a first threshold, And the processing device selects one of the user equipments whose first signal strength is greater than the first threshold value when there is a user equipment corresponding to the candidate user bearer whose first signal strength is greater than the first threshold value, To perform preemption. The wireless access node according to claim 25, wherein the first signal strength between the user equipment corresponding to the candidate user bearer connected to the second network and the second network is When the processing is not greater than the first threshold, the processing device determines, according to the measurement report of the user equipment corresponding to the candidate user bearer that can be connected to a third network, each candidate that can be connected to the third network. Whether a second signal strength between the user equipment corresponding to the user bearer and the third network is greater than a second threshold, and wherein the candidate user bearer corresponding to the second signal strength is greater than the second threshold In the user equipment, the processing device selects one of the user equipments whose second signal strength is greater than the second threshold to perform preemption. The wireless access node of claim 26, wherein the second signal strength between the user equipment corresponding to the candidate user bearer connected to the third network and the third network is When none of the second thresholds is greater than the second threshold, the processing device selects one of the candidate user bearers to perform preemption. The wireless access node according to claim 22, wherein when the one of the candidate user bearers is preempted, the wireless access node The user equipment corresponding to the candidate user that is preempted by the preemption is connected to the corresponding heterogeneous network.