TWI645738B - A resource control method for authorizing an auxiliary access network and a non-volatile device readable medium for enabling the device to perform the method - Google Patents

Abstract

The present invention relates to a resource control method for authorizing an auxiliary access network and a non-volatile device readable medium for enabling the device to perform the method, mainly by setting the non-volatile device readable medium to make the field domain A base device can perform the method, so that the base device can dynamically determine the data transmission time according to the channel interference condition between the base device and the user equipment in the transmission range, and can further determine the transmission through the license or non-licensed channel frequency band. It is an effective resource allocation technology.

Description

A resource control method for authorizing an auxiliary access network and a non-volatile device readable medium for enabling the device to perform the method

The present invention relates to a resource control method and a non-volatile device readable medium for enabling a device to perform the method, and more particularly to a technique for applying to a small cell device authorized to access an access network to regulate transmission time.

The LTE (Long Term Evolution) technology continues to improve spectrum utilization efficiency and frequency band integration evolution, and the LTE License-assisted Access (LAA) technology also It is a technology with great potential.

Authorized auxiliary access mainly utilizes the Carrier Aggregation technology framework of the existing LTE technology to extend the carrier aggregation to the license-free frequency band, and is mainly applied to small cell (Small Cell) devices to increase connection with small cell devices. The user's transmission speed.

However, at present, LAA is only a conceptual technology, which mainly operates the authorized auxiliary access technology through the Listen Before Talk program, that is, the small cell device will listen to the data before transmitting it. Whether the user equipment in the range is also transmitting data to avoid the collision of packets.

Although this technology of listening and sending is highly developed, it is highly developed. When implemented in the field, the listening and transmission range between small cell devices may overlap, but the range of energy detection that small cell devices use to listen to each other may still cause packet collision when transmitting data; or Small cell devices may use adjacent channels for data transmission. If the user device filter is not good, packet collision may occur.

Therefore, if a technology can be developed to solve the packet collision between small cell devices in the authorized auxiliary access technology, the overall system performance should be improved, and the authorized auxiliary access technology can exert its performance.

The present invention provides a resource control method for a licensed Assisted Access (LAA) system, wherein the LAA is a technology in the Long Term Evolution (LTE) family.

The method is mainly implemented by a wireless base station in an authorized auxiliary access network system, and the wireless base station is set in a field, because the authorized auxiliary access technology has a mechanism of listening and sending, and has a mechanism for listening. An energy detection range, the method comprising at least the following steps: before the wireless base device prepares to transmit data to a mobile device within the energy detection range, according to a channel interference state between the wireless base device and the mobile device To dynamically determine a data transmission time, the data transmission time can be expressed as t + Bias _TX ( t ), and the data transmission time adjustment can be used to control the time-frequency resource of the wireless base device, so that the wireless base device Operational authorization assisted access technology performance improvement.

Wherein, the mobile device will continuously or discretely feed back to the wireless base device whether the received data is correct, and before the wireless base device prepares to transmit the data to the mobile device (the point is t ), if the action is taken at the time The real-time data receiving correct rate ( C _i,t ) of the device feedback is greater than the recent data receiving correct rate ( C _i,tT ) of the mobile device in the previous certain time ( T ), which represents the wireless base device and the action co-channel interference between the devices should be lower than previously, so the need to reduce the data transmission time, i.e., the line Bias _TX (t) is set to - △ _T, △ _T is a predetermined time-based values, in order to reduce waste of resources.

Wherein, if the real-time data receiving correct rate ( C _i,t ) fed back by the mobile device at this time is less than the recent data receiving correct rate ( C _i,tT ) of the mobile device feeding back within a certain certain time ( T ), The channel interference between the wireless base device and the mobile device should be higher than before, so the data transmission time needs to be increased, that is, the Bias _TX ( t ) is set to +Δ _T to effectively utilize the time-frequency resources.

Wherein, if the real-time data receiving correct rate ( C _i,t ) fed back by the mobile device is higher than a preset ideal threshold ( S _TH ), it indicates that the current time-frequency resource of the wireless base device is in operation authorization assistance. In the best range of access technology, or no data transmission in the previous certain time ( T ), the data transmission time is maintained.

Wherein, when the data transmission time is increased or maintained, the wireless base device can transmit the data to the mobile device through the unlicensed frequency band during the data transmission time, thereby increasing the license-free frequency band of the wireless base device Time-frequency resource usage.

Wherein, when the data transmission time is reduced, the wireless base station transmits the data of the Guaranteed Bit Rate (GBR) to the mobile device through the license band only during the data transmission time, and the non-guaranteed bit The non-Guaranteed Bit Rate (non-GBR) data is transmitted through the license-free frequency band, thereby increasing the time-frequency resource usage rate of the unlicensed band of the wireless base device.

The invention further comprises a non-stored device executable instruction a volatile device readable medium, which is disposed in a wireless base device that authorizes an auxiliary access authorization access network system, and the instructions enable the wireless base device to perform the resource control method of the authorized auxiliary access network .

The resource control method for the authorized auxiliary access network provided by the present invention and the medium for executing the same can dynamically adjust the time-frequency resource according to the channel interference state, and can be repeatedly executed to make the wireless base device be in the operation authorization auxiliary access technology. In the best range, the time-frequency resource usage rate of the unlicensed band of the wireless base device can be increased, which can effectively improve the shortcomings of the prior art.

A‧‧‧ third-party wireless network base station

B‧‧‧First small cell

C‧‧‧Second small cell

1‧‧‧User equipment

2‧‧‧User equipment

3‧‧‧User equipment

4‧‧‧User equipment

S201~S205‧‧‧ method steps

S301~S310‧‧‧ method steps

Figure 1 is a schematic diagram of a possible interference problem for a system that authorizes an auxiliary access network.

FIG. 2 is a schematic diagram of main steps of a resource regulation method for authorizing an auxiliary access network according to the present invention.

FIG. 3 is a schematic diagram showing the detailed steps of the resource control method for authorizing the auxiliary access network according to the present invention.

The present invention will be further described by way of embodiments with reference to the accompanying drawings. FIG. 1 is a schematic diagram of a possible interference problem of a system for authorizing an auxiliary access network. The range of three approximate circles is visible from left to right in the figure, from left to right. The right represents the data transmission range of the third-party wireless network (Wi-Fi) base station A, the first small cell (Small Cell SC) B, and the second small cell C, respectively, wherein the user equipment (User Equipment) 1, used Both the device 2 and the user device 3 are attached to the first small cell B for data transmission, and the user device 4 Then, the second small cell C is attached to the data transmission, wherein the user equipment 1 and the user equipment 4 are first defined as being in an ideal transmission state.

According to the traditional technology implementation, the range of energy detection used by each base station and small cell operation may be different when the first base station is operated, and the base stations and small cells may transmit data through the adjacent frequency. The problem arises: First, if the first small cell B operates the energy detection after the first listening, it detects that no other device uses the same transmission channel, so it starts data transmission, however, because the first small cell B is different from the energy detection threshold used by the second small cell C. When the detection range of the first small cell B is small, it cannot detect the instantaneous transmission state of the second small cell C. The transmitted packet may collide; or, when the first small cell B operates the energy detection after the first listening, it detects that no other device uses the same transmission channel, so it starts to transmit data, however Because the third-party wireless network base station A or the second small cell C is transmitting data through the adjacent channel of the first small cell B transmission channel, if the filters of the user device 2 and the user device 3 are not ideal, Connect The data packets have errors may occur.

2 is a schematic diagram of main steps of a resource control method for authorizing an auxiliary access network according to the present invention, which mainly adjusts time-frequency resources according to potential interference sources through dynamically adjustable data transmission time, so that base device operation authorization auxiliary connection The efficiency of the technology is improved. The first step S201 is mainly to set the time when the base device can perform data transmission to a dynamic value, which is t + Bias _TX ( t ), wherein the Bias _TX ( t ) is a preset adjustment parameter used to determine The base device operates to authorize the access control technology to transmit time, and the Bias _TX ( t ) is dynamically adjusted according to the data receiving correct rate fed back by the receiving device connected to the base device. The second step S202 is to adjust the time when the base device can perform data transmission according to the feedback information of the receiving device. Before the base device wants to start transmitting information, if the receiving device returns its immediate data, the correct rate of receiving data is higher than the previous received data. At the time rate, it may represent that the interference of the transmission channel is low. At this time, the adjustment parameter Bias _TX ( t ) of t time is set to -Δ _T , where -Δ _T is the time trimming value, which is a positive value, so The data transmission time of the base equipment will be reduced to properly utilize the system resources; conversely, when the receiving equipment returns its immediate data receiving accuracy rate is lower than the previous receiving data correct rate, it may represent that the transmission channel interference is high, so The adjustment parameter Bias _TX ( t ) of t time must be set to +Δ _T to increase more transmission time; in addition, if the receiving device reports that the real data receiving accuracy rate is within a range higher than an ideal threshold S _TH , then Bias _TX ( t ) will be set to 0 because it represents that the base equipment is in the best range of operational authorization access technologies.

FIG. 3 is a schematic diagram showing the detailed steps of the method for controlling the resource of the auxiliary access network according to the present invention. Step S301 is to calculate the instantaneous data receiving accuracy rate C _{i,T of the} receiving device i at the time ( t ) of the base device to transmit data. _where, C _{i, T,} is calculated as the number of the receiving device i successful transmission of information within the time T divided by the total number of transfers within the time T i of the device. Going to step S302 again, if the base device does not transmit data in tT , the process proceeds to step S303 to set the value of the adjustment parameter Bias _TX ( t ) of t time to zero. If the base device has data transmission in the tT time, the process proceeds to step S304 to compare the instantaneous data receiving accuracy rate C _i,T with the ideal threshold S _TH , wherein the S _TH is an adjustment threshold, and the value thereof The boundary is between 0 and 1.

Next, in FIG. 3, if the value of C _{i, T} is greater than the ideal threshold S _TH , the process proceeds to step S303 to set the adjustment parameter Bias _TX ( t ) of t time to zero. If the base device has data transmission in the tT time, and the transmission status data receiving correct rate C _{i, the T} value is less than the ideal threshold S _TH , then the process proceeds to step S305 to determine whether the C _{i , T} value is greater than the recent data reception accuracy rate C _{i , tT} value, if C _{i, T} value is greater than or equal to the value of C _{i, T} , which means that the instantaneous data receiving accuracy rate is high, then proceeds to step S306 to set the t time adjustment parameter Bias _TX ( t ) to tT time. adjustment parameters Bias _TX (tT) plus the value of a negative time spinner - △ _T, in order to reduce the data transmission time; the contrary, if C _{i, T} value of less than C _i, the value of _T, representative of the correct instant data rate of the received is low, the process proceeds to step S307 Bias _TX (t) to adjust the parameters Bias tT time _TX (tT) plus a positive time trim value + △ _T.

Still referring to FIG. 3, wherein the step S308 is followed by step S308, which determines whether the adjustment parameter Bias _TX ( t ) of t time is greater than or equal to zero, and if Bias _TX ( t ) is greater than or equal to zero, proceeds to step S309, where data is transmitted. During time t + Bias _TX ( t ), the base device will use the unlicensed band for data transmission of device i , and Bias _TX ( t )=0 in step S303, so it will also continue to step S309. In addition, the step S307 is followed by step S310. During the data transmission time t + Bias _TX ( t ), the base device uses the licensed frequency band to perform the guaranteed bit rate (GBR) data transmission of the device i , and uses the license-free frequency band. Non-guaranteed bit rate (non-GBR) data transfer for device i . This method step can be repeated to continuously adjust the data transmission time of the base device so that it can be in the optimal range of operational authorization access technology.

Finally, please refer to FIG. 1. In the schematic scenario of the possible interference problem, if the resource control method for granting the auxiliary access network of the present invention is implemented, the problem can be solved as described later, wherein the device can be executed by storing the device. The commanded non-volatile device readable medium is disposed on the first small cell B, and the first small cell B can perform the resource control method of the authorized access network of the present invention. Wherein, in the field of use, when the first small cell B receives the real data receiving correct rate fed back by the user equipment 2, the first small cell B determines that the data transmission correct rate of the user equipment 2 is lower than before. It may represent more channel interference. At this time, it sets Bias _TX ( t ) to +Δ _T , whereby the first small cell B can increase the data transmission time to avoid collision and loss of the transmitted data packet; If the first small cell B receives instant feedback data user apparatus 3 receives the correct rate, the user device transmits the information found in the 3 high accuracy, it may be Bias _TX (t) is set to - △ _T, in order to By reducing the data transmission time, the waste of transmission resources can be avoided, and the overall system performance can be effectively improved.

Compared with the prior art, the present invention can provide the base device to dynamically allocate resources according to channel interference conditions in the communication range, and can effectively improve the performance of the device operation authorization auxiliary access technology under the influence of potential interference sources.

In summary, the present invention is innovative in terms of technical ideas, and also has various functions that are not in the prior art, and has fully complied with the statutory invention patent requirements of novelty and progressiveness, and has filed a patent application according to law, and invites you to approve the invention. The patent application was inspired to invent, and it was a matter of feeling.

Claims (10)

A resource control method for authorizing an auxiliary access network, which is implemented by a wireless base station that authorizes the auxiliary access network system to perform at least the following steps: before the wireless base station prepares to transmit data to a mobile device within the listening range Dynamically determining a data transmission time according to a channel interference state between the wireless base device and the mobile device for resource regulation; wherein, if the mobile device returns its immediate data receiving accuracy rate is higher than a previous data in a certain period of time Receiving the correct rate and reducing the data transmission time; wherein, if the mobile device returns its immediate data receiving accuracy rate is lower than the recent data receiving accuracy rate in the previous certain time period, the data transmission time is increased; and wherein the mobile device feedback The real-time data receiving accuracy rate is higher than an ideal threshold, or there is no data transmission in a certain period of time, and the data transmission time is maintained. The method of claim 1, wherein the data transmission time is t + Bias _TX ( t ), wherein if the mobile device returns its immediate data reception accuracy rate is higher than the recent data reception accuracy rate, Bias _TX ( t ) will be set to -Δ _T . If the instantaneous data reception accuracy is lower than the recent data reception accuracy rate, Bias _TX ( t ) will be set to +Δ _T , if it is higher than the ideal threshold or a certain time If there is no data transmission, then Bias _TX ( t ) will be set to 0. The method of any one of claims 1 to 2, further comprising the step of transmitting data to the mobile device through the unlicensed frequency band when the data transmission time is increased or maintained. The method of any one of claims 1 to 2, further comprising the step of: ensuring a bit rate (Guaranteed Bit Rate, GBR) of the mobile device through the licensed frequency band when the data transmission time is reduced ) Data transmission. The method of claim 4, further comprising the step of non-guaranteed bit rate (non-GBR) of the mobile device through the unlicensed band when the data transmission time is reduced. ) Data transmission. A non-volatile device readable medium storing device executable instructions, which is disposed in a wireless base device authorized to access an authorized auxiliary access network system, the instructions for performing at least the following steps: Before the wireless base station prepares to transmit data to a mobile device in the listening range, dynamically determines a data transmission time according to a channel interference condition between the wireless base device and the mobile device to perform resource regulation; wherein, if the mobile device The correct rate of receiving real-time data is higher than the previous data receiving accuracy rate in a certain period of time, and the data transmission time is reduced. Among them, if the mobile device returns its real-time data receiving accuracy rate is lower than the previous data received in the previous certain period, the data is correctly received. Rate, increasing the data transmission time; and wherein, if the mobile device returns its immediate data reception accuracy rate is higher than an ideal threshold, or has no data transmission for a certain period of time, the data transmission time is maintained. The non-volatile device readable medium of claim 6, wherein in the step of executing the instruction, the data transmission time is t + Bias _TX ( t ), wherein if the mobile device returns its instant Bis _TX ( t ) will be set to -Δ _T if the data reception accuracy rate is higher than the recent data reception accuracy rate. If the real-time data reception accuracy rate is lower than the recent data reception accuracy rate, the Bias _TX ( t ) will be set to +△ _T , if there is no data transmission above the ideal threshold or for a certain period of time, Bias _TX ( t ) will be set to 0. The non-volatile device readable medium according to any one of claims 6 to 7, wherein the step of executing the instruction further comprises: when the data transmission time is increased or maintained, the unlicensed frequency band is used The mobile device transmits data. The non-volatile device readable medium of any one of the preceding claims, wherein the step of executing the instruction further comprises: performing the mobile device through the licensed frequency band when the data transmission time is reduced Guaranteed data transfer of the Guaranteed Bit Rate (GBR). The non-volatile device readable medium of claim 9, wherein the step of executing the instruction further comprises: performing non-guaranteed bit rate on the mobile device through the unlicensed frequency band when the data transmission time is reduced (non-Guaranteed Bit Rate, non-GBR) data transmission.