CN107612602B - Wave beam recovery method and device of millimeter wave communication system - Google Patents
Wave beam recovery method and device of millimeter wave communication system Download PDFInfo
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Abstract
The invention provides a wave beam recovery method and a device of a millimeter wave communication system, wherein the method comprises the following steps: when receiving beam failure information sent by a user side, sequentially switching a current beam pair to one beam pair in an appointed beam pair set until the quality of service (QoS) of the switched beam pair is higher than a preset threshold value; the beam pairs in the designated beam pair set are obtained by screening the beam pairs in the first area and the beam pairs in the adjacent area of the first area, wherein the first area is the area where the user side is located before the beam failure. By sequentially switching the current beam to the beam pair with the designated beam pair set, the beam recovery can be completed only by switching for a few times, and compared with the traditional recovery method based on exhaustive search, the recovery time delay and the resource overhead required by the beam recovery are greatly reduced.
Description
Technical Field
The embodiment of the invention relates to the technical field of communication, in particular to a beam recovery method and device of a millimeter wave communication system.
Background
With the development of economy and society, the demand for communication rate is on the exponential growth trend. Millimeter waves are considered as a key technology of the next generation wireless communication system (5G) due to their rich spectrum resources. The wavelength of the millimeter wave frequency band is short, the size of the antenna is small according to the antenna theory, a large number of antennas can be integrated in a small area, and high transmission loss of the millimeter wave frequency band is compensated conveniently through a beam forming technology.
Consider an indoor millimeter wave system having a base station and a subscriber, the base station using N directional beams and the subscriber using M directional beams, typically M < < N, for a total of M x N available beam pairs. The base station and the user terminal respectively satisfy that each beam has the same size and the angular coverage in different directions. The surrounding walls may provide reflection for the beam and bring about some attenuation of the reflection. Walls in a room may provide reflection for the beam and give some reflection attenuation, and millimeter waves may be subject to some penetration attenuation when penetrating the walls in the room, the degree of attenuation depending on their material properties. The link loss for an arbitrary path can be calculated as:
Ploss＝20lg(d)+PR+PT
wherein, PlossDenotes link loss, d denotes path length, PRDenotes reflection loss, PTIndicating a loss of penetration. Because the path length of the non-direct path (NLOS) is large, only the NLOS of the first order reflection is considered. Under the indoor condition, the probability of direct path (LOS) is high due to the short path length, and the probability of LOS path in an open place under the outdoor condition is also high.
In an actual scenario, a currently used beam pair may have a Quality of Service (QoS) reduced below a threshold due to a moving human body occlusion, a movement of a user terminal, and a fixed obstruction encountered during the movement process, thereby causing a beam failure. At this time, the available beam pairs meeting the QoS threshold condition need to be searched again, which is also called beam recovery. In the prior art, a beam recovery method based on exhaustive search is generally adopted, beam recovery can be completed only after M × N beam pairs are searched, and higher recovery delay and higher cost are brought under the scene that beam recovery is required frequently.
Disclosure of Invention
Embodiments of the present invention provide a beam recovery method and apparatus for a millimeter wave communication system, which overcome the above problems or at least partially solve the above problems.
In one aspect, an embodiment of the present invention provides a beam recovery method for a millimeter wave communication system, where the method includes:
s1, when receiving the beam failure information sent by the user terminal, switching the current beam pair to one beam pair in the appointed beam pair set in sequence until the QoS of the switched beam pair is higher than the preset threshold;
the beam pairs in the designated beam pair set are obtained by screening the beam pairs in the first area and the beam pairs in the adjacent area of the first area, wherein the first area is the area where the user side is located before the beam failure.
Wherein, before step S1, the method further comprises:
searching all beam pairs of the first area, and acquiring QoS values of all beam pairs of the first area;
taking the beam pair with the highest QoS value in all the beam pairs of the first area as a direct path LOS beam pair of the first area, and taking the beam pair with the second highest QoS value in all the beam pairs of the first area as a non-direct path NLOS beam pair of the first area;
obtaining the LOS beam pair number of the first area and the NLOS beam pair number of the first area, and storing the LOS beam pair number of the first area and the NLOS beam pair number of the first area into a corresponding position in a beam table corresponding to a user side; the beam table corresponding to the user side stores the numbers and the corresponding relations of LOS beam pairs and NLOS beam pairs in all areas.
Wherein the designated beam pair set at least includes the LOS beam pair in the first region, and the sequentially switching the current beam pair to one of the designated beam pair set specifically includes:
obtaining the LOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to a beam pair corresponding to the LOS beam pair number of the first area.
Wherein the designated beam pair set at least includes the NLOS beam pairs of the first region, and the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
acquiring the NLOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to a beam pair corresponding to the NLOS beam pair number of the first area.
Wherein the designated beam pair set at least includes LOS beam pairs of the adjacent area, and the sequentially switching the current beam pair to one of the designated beam pair set specifically includes:
inquiring to obtain the LOS beam pair number of the adjacent area according to the LOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to the beam pair corresponding to the LOS beam pair number of the adjacent area.
Wherein the designated beam pair set at least includes NLOS beam pairs of the adjacent area, and the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
inquiring to obtain the LOS beam pair number of the adjacent area according to the LOS beam pair number of the first area in a beam table corresponding to the user side;
inquiring to obtain the NLOS beam pair number of the adjacent area according to the LOS beam pair number of the adjacent area in a beam table corresponding to the user side;
and switching the current beam pair to the beam pair corresponding to the NLOS beam pair number of the adjacent area.
Wherein the adjacent area includes two areas, which are divided into a second area and a third area, the second area and the third area are respectively located at two sides of the first area, and the designated beam pair set at least includes: a LOS beam pair of the first region, a NLOS beam pair of the first region, a LOS beam pair of the second region, a LOS beam pair of the third region, a NLOS beam pair of the second region, and a NLOS beam pair of the third region; the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
and sequentially switching the current beam pair to one of the LOS beam pair of the first region, the NLOS beam pair of the first region, the LOS beam pair of the second region, the LOS beam pair of the third region, the NLOS beam pair of the second region and the NLOS beam pair of the third region.
In another aspect, an embodiment of the present invention provides a beam recovery apparatus for a millimeter wave communication system, where the apparatus includes:
the switching module is used for sequentially switching the current beam pair to one beam pair in the appointed beam pair set when receiving the beam failure information sent by the user side until the QoS (quality of service) of the switched beam pair is higher than a preset threshold value;
the beam pairs in the designated beam pair set are obtained by screening the beam pairs in the first area and the beam pairs in the adjacent area of the first area, wherein the first area is the area where the user side is located before the beam failure.
Another aspect of the present invention provides a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above method.
In another aspect, an embodiment of the present invention provides a non-transitory computer-readable storage medium storing computer instructions for causing a computer to perform the above method
According to the beam recovery method and device for the millimeter wave communication system, the current beam is sequentially switched to the beam pair with the centralized designated beam pair, the beam recovery can be completed only by switching for a few times, and compared with a traditional recovery method based on exhaustive search, recovery time delay and resource overhead required by the beam recovery are greatly reduced.
Drawings
Fig. 1 is a flowchart of a beam recovery method of a millimeter wave communication system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a beam pair between a base station and a user end in a millimeter wave communication system according to an embodiment of the present invention;
fig. 3 is a simulation curve of cumulative distribution functions of the beam recovery method and the required search times based on the exhaustive search recovery method according to the embodiment of the present invention;
fig. 4 is a simulation diagram of a beam recovery method and a required search frequency based on an exhaustive search recovery method according to an embodiment of the present invention;
fig. 5 is a block diagram of a beam recovery apparatus of a millimeter wave communication system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments, but not all embodiments, of the present invention. 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.
In the millimeter wave communication system, if the base station adopts N directional beams, the N directional beams of the base station respectively cover a sector area, and the N sector areas form a circular area with one base station as the center of a circle. In the embodiments of the present invention, the areas all refer to sector areas covered by one directional beam of the base station, and are not described in detail below.
Fig. 1 is a flowchart of a beam recovery method of a millimeter wave communication system according to an embodiment of the present invention, and as shown in fig. 1, the method includes: s1, when receiving the beam failure information sent by the user terminal, switching the current beam pair to one beam pair in the appointed beam pair set in sequence until the QoS of the switched beam pair is higher than the preset threshold; the beam pairs in the designated beam pair set are obtained by screening the beam pairs in the first area and the beam pairs in the adjacent area of the first area, wherein the first area is the area where the user side is located before the beam failure.
The communication channels of the base station and the user terminal are divided into a downlink communication channel and an uplink communication channel, the beam failure is the beam failure of the downlink communication channel, and the user terminal can feed back the beam failure information to the base station through the uplink communication channel. To ensure the connectability of the uplink communication channel, the uplink communication channel may use no beamforming or conventional low-band carrier. The beam failure is judged by the user side, and the basis for judging the beam failure is whether the QoS of the current beam pair used by a downlink communication channel between the base station and the user side is reduced below a preset threshold value. The selection of the preset threshold is related to the channel environment and the signal-to-noise ratio SNR required for transmission, and meanwhile, in consideration of the dynamic fluctuation of the channel, the judgment basis can be set to be that the QoS of the current beam pair is always lower than the preset threshold in a time period.
In an indoor millimeter wave communication system and an outdoor millimeter wave communication system when LOS beams are many, beam failure is generally caused by three reasons: the current beam pair is blocked, the user terminal moves or the current beam pair is blocked and the user terminal moves together.
Specifically, when a beam failure occurs, the reason for the beam failure cannot be known in advance, so the method adopted in the embodiment of the present invention sequentially switches the current beam pair to the beam pair in which the designated beam pair is concentrated, and determines whether the QoS of the switched beam pair is higher than a preset threshold value by obtaining the QoS of the switched beam pair, so as to determine whether beam recovery is completed. And if the QoS after the switching is higher than the preset threshold, judging that the beam recovery is finished, and stopping the switching. And if the QoS after the switching is lower than the preset threshold value, continuing to switch to other beam pairs in the appointed beam pair set.
According to the beam recovery method of the millimeter wave communication system, provided by the embodiment of the invention, the current beam is sequentially switched to the beam pair with the concentrated designated beam pair, and the beam recovery can be completed only by switching for a few times.
Based on the above embodiment, before step S1, the method further includes:
searching all beam pairs of the first area, and acquiring QoS values of all beam pairs of the first area;
taking the beam pair with the highest QoS value in all the beam pairs of the first area as a direct path LOS beam pair of the first area, and taking the beam pair with the second highest QoS value in all the beam pairs of the first area as a non-direct path NLOS beam pair of the first area;
obtaining the LOS beam pair number of the first area and the NLOS beam pair number of the first area, and storing the LOS beam pair number of the first area and the NLOS beam pair number of the first area into a corresponding position in a beam table corresponding to a user side; the beam table corresponding to the user side stores the numbers and the corresponding relations of LOS beam pairs and NLOS beam pairs in all areas.
The beam table corresponding to the user side stores the numbers and the corresponding relations of LOS beam pairs and NLOS beam pairs in all areas, and the number of each beam pair corresponds to the emission angle of the base station and the arrival angle of the user side.
Specifically, in an idle period or a data transmission period before a beam failure occurs, the base station performs periodic beam search to determine QoS of each beam pair in an area where the current user terminal is located, and further determines a LOS beam pair and a corresponding NLOS beam pair in the area in the beam table.
Based on the foregoing embodiment, the designated beam pair set at least includes the LOS beam pair in the first region, and the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
obtaining the LOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to a beam pair corresponding to the LOS beam pair number of the first area.
Based on the above embodiment, the designated beam pair set at least includes the NLOS beam pairs of the first region, and the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
acquiring the NLOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to a beam pair corresponding to the NLOS beam pair number of the first area.
It can be understood that, when a current beam is blocked to cause a beam failure, the first area is an area where the user terminal is currently located, and an LOS beam pair and an NLOS beam pair in the area where the user terminal is located often have a certain angle difference in space, and are not blocked at the same time, so that the beam recovery can be achieved only by switching the current beam pair to the LOS beam pair or the NLOS beam pair in the area.
Specifically, as shown in fig. 2, when the user terminal is in different areas, the LOS beam pairs used are different; in a certain area, there are LOS beam pairs and NLOS beam pairs. The base station detects whether the current beam pair is a LOS beam pair or an NLOS beam pair. And if the current beam pair is an LOS beam pair S, switching the current beam pair into a corresponding LOS beam pair, and if the current beam pair is an NLOS beam pair, switching the current beam pair into a corresponding LOS beam pair, wherein the correspondence between the LOS beam pair and the NLOS beam pair can be found in a beam table.
And the user side detects the QoS of the switched beam pair and compares the QoS with a preset threshold value. And if the QoS of the switched beam pair is larger than the preset threshold, the user end informs the base station end of stopping switching through the uplink communication channel to finish beam recovery. And if the QoS of the switched beam pair is still smaller than the preset threshold, the user side informs the base station side to continue to execute the beam recovery operation through the uplink communication channel.
Based on the foregoing embodiment, the designated beam pair set at least includes LOS beam pairs of the adjacent area, and the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
inquiring to obtain the LOS beam pair number of the adjacent area according to the LOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to the beam pair corresponding to the LOS beam pair number of the adjacent area.
It can be understood that, when a beam failure is caused by a user equipment moving, at this time, the first area is an area where the user equipment is located before the beam failure occurs, the user equipment moves to an adjacent area, and a current beam pair is also an LOS beam pair or an NLOS beam pair of the first area, so that the current beam needs to be switched to the LOS beam pair or the NLOS beam pair of the adjacent area to complete beam recovery, while a general LOS beam pair is a beam pair with the highest QoS in the beam pair of the area where the current beam is switched to the LOS beam pair of the adjacent area.
Specifically, since the ue moves from the first area to the adjacent area and the current beam pair is still the beam pair of the first area, a beam failure occurs. And the base station inquires the LOS beam pair number of the adjacent area in a beam table corresponding to the user side according to the LOS beam pair number of the first area, and switches the current beam pair to the beam pair corresponding to the LOS beam pair number of the adjacent area, namely switches the current beam pair to the LOS beam pair of the adjacent area.
And the user side detects the QoS of the switched beam pair and compares the QoS with a preset threshold value. And if the QoS of the switched beam pair is larger than the preset threshold, the user end informs the base station end of stopping switching through the uplink communication channel to finish beam recovery. And if the QoS of the switched beam pair is still smaller than the preset threshold, the user side informs the base station side to continue to execute the beam recovery operation through the uplink communication channel.
Based on the above embodiment, the designated beam pair set at least includes the NLOS beam pairs of the adjacent area, and the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
inquiring to obtain the LOS beam pair number of the adjacent area according to the LOS beam pair number of the first area in a beam table corresponding to the user side;
inquiring to obtain the NLOS beam pair number of the adjacent area according to the LOS beam pair number of the adjacent area in a beam table corresponding to the user side;
and switching the current beam pair to the beam pair corresponding to the NLOS beam pair number of the adjacent area.
It can be understood that, when a beam fails due to the interaction between the current beam pair being blocked and the user terminal moving, the current beam needs to be switched to an NLOS beam pair of an adjacent area to complete beam recovery.
Specifically, since the user terminal moves from the first area to the adjacent area and the LOS beam pair of the adjacent area is blocked, and the current beam pair is still the beam pair of the first area, a beam failure is generated. And the base station inquires the LOS beam pair number of the adjacent area in the beam table corresponding to the user side according to the LOS beam pair number of the first area to obtain the LOS beam pair number of the adjacent area, inquires the NLOS beam pair number of the adjacent area in the beam table corresponding to the user side according to the LOS beam pair number of the adjacent area, and finally switches the current beam pair to the beam pair corresponding to the NLOS beam pair number of the adjacent area, namely switches the current beam pair to the NLOS beam pair of the adjacent area.
And the user side detects the QoS of the switched beam pair and compares the QoS with a preset threshold value. And if the QoS of the switched beam pair is larger than the preset threshold, the user end informs the base station end of stopping switching through the uplink communication channel to finish beam recovery.
Further, if the QoS of the switched beam pair is still less than the preset threshold, the user end notifies the base station end to continue to perform the beam recovery operation through the uplink communication channel. And the base station end performs descending sorting on all the beam pairs according to the use times in a period of time (the sorting operation can be completed before the beam failure occurs), then searches the beam pairs which are not switched to in the previous step in a descending manner until the searched beam pairs meet the QoS threshold condition, and stops searching to complete beam recovery.
Based on the above embodiment, the adjacent area includes two areas, which are divided into a second area and a third area, the second area and the third area are respectively located at two sides of the first area, and the designated beam pair set at least includes: a LOS beam pair of the first region, a NLOS beam pair of the first region, a LOS beam pair of the second region, a LOS beam pair of the third region, a NLOS beam pair of the second region, and a NLOS beam pair of the third region; the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
and sequentially switching the current beam pair to one of the LOS beam pair of the first region, the NLOS beam pair of the first region, the LOS beam pair of the second region, the LOS beam pair of the third region, the NLOS beam pair of the second region and the NLOS beam pair of the third region.
Generally, the base station uses a larger number of beams, the user terminal uses a smaller number of beams, and the movement of the user terminal causes the change of the transmission angle of the base station and the change of the arrival angle of the user terminal. In case of a base station using a uniform linear antenna ULA, the LOS beam has 2 directions (variations of the rotation angle of the base station) of neighboring beams, and if the base station uses a uniform planar antenna UPA, the LOS beam has 8 directions (variations of the rotation angle and the pitch angle), however, the user terminal often only moves in the horizontal direction and not in the vertical direction, and the pitch angle is usually fixed, so that only 2 directions of neighboring beams need to be considered.
Specifically, the switching is performed according to the sequence of sequentially excluding the occlusion of the current beam pair, the movement of the user terminal, and the combined action of the occlusion of the current beam pair and the movement of the user terminal.
Further, when the user terminal moves directionally, the sequentially switching the current beam pair to one of the designated beam pair sets specifically includes:
sequentially switching a current beam pair to one of the LOS beam pair of the first region, the NLOS beam pair of the first region, the LOS beam pair of the second region and the NLOS beam pair of the second region; alternatively, the first and second electrodes may be,
and sequentially switching the current beam pair to one of the LOS beam pair of the first region, the NLOS beam pair of the first region, the LOS beam pair of the third region and the NLOS beam pair of the third region.
Specifically, the user terminal has a process of directional movement in different time periods. The implementation between the base station and the user terminal indicates LOS beam pairs between the base station and the user terminal when the user terminal is in different areas, and the dotted line indicates a plurality of NLOS beam pairs between the base station and the user terminal when the user terminal is in different areas. In this process, the base station compares the size relationship between the switched beam pair number and the beam pair number used when the beam failure occurs, to determine the change direction of the beam emission angle at the base station end caused by the movement of the user, and when the user moves directionally, the change direction can be used as the predicted switching direction when the beam is recovered next time. This may reduce the number of handovers, resulting in less overhead of beam recovery resources.
Because periodic beam searching can determine the LOS and NLOS in the area where the current user is located, for the conventional beam recovery method, when a beam failure occurs, the beam is first switched to the NLOS, and if the QoS requirement is not met, exhaustive searching is performed until the beam meeting the QoS requirement is switched.
The performance of the conventional beam recovery method and the beam recovery method provided by the present invention are compared next:
fig. 3 is a simulation curve of cumulative distribution functions of the beam recovery method provided by the embodiment of the present invention and the required search times based on the exhaustive search recovery method, the average search times required by the two recovery methods are 1.873 and 8.512, respectively, and compared with the conventional recovery method, the recovery method provided by the present invention can reduce the search times to 22% of the original search times, thereby greatly reducing the time delay and the overhead in the recovery process.
Fig. 4 is a simulation diagram of the beam recovery method provided in the embodiment of the present invention and the number of searches required based on the exhaustive search recovery method, where the number of searches in the recovery method provided in the embodiment of the present invention is mostly not more than 5, which indicates that the recovery method is successful in most cases, and the reason why the number of searches exceeds 5 may be that LOS and NLOS are simultaneously blocked, LOS does not exist (blocked by a fixed blocking object), historical beam information is inaccurate, and the like. Meanwhile, the beam recovery method provided by the invention has fewer beam failure times than the conventional beam recovery method, which indicates that the beam found by the beam recovery method provided by the invention is more likely to be the optimal beam on the premise of being based on the threshold criterion.
Fig. 5 is a block diagram of a beam recovery apparatus of a millimeter wave communication system according to an embodiment of the present invention, and as shown in fig. 5, the apparatus includes a switching module 1, where:
the switching module 1 is used for sequentially switching the current beam pair to one beam pair in the designated beam pair set when receiving the beam failure information sent by the user side until the quality of service (QoS) of the switched beam pair is higher than a preset threshold value; the beam pairs in the designated beam pair set are obtained by screening the beam pairs in the first area and the beam pairs in the adjacent area of the first area, wherein the first area is the area where the user side is located before the beam failure.
Specifically, when a beam failure occurs, the reason for the beam failure cannot be known in advance, so the method adopted in the embodiment of the present invention sequentially switches the current beam pair to the beam pair in which the designated beam pair is concentrated, and determines whether the QoS of the switched beam pair is higher than a preset threshold value by obtaining the QoS of the switched beam pair, so as to determine whether beam recovery is completed. And if the QoS after the switching is higher than the preset threshold, judging that the beam recovery is finished, and stopping the switching. And if the QoS after the switching is lower than the preset threshold value, continuing to switch to other beam pairs in the appointed beam pair set.
According to the beam recovery device of the millimeter wave communication system, provided by the embodiment of the invention, the current beam is sequentially switched to the beam pair with the concentrated designated beam pair, and the beam recovery can be completed only by switching for a few times.
Embodiments of the present invention provide a computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, which when executed by a computer, enable the computer to perform the methods provided by the above-mentioned method embodiments, for example, including: when receiving beam failure information sent by a user side, sequentially switching a current beam pair to one beam pair in an appointed beam pair set until the quality of service (QoS) of the switched beam pair is higher than a preset threshold value; the beam pairs in the designated beam pair set are obtained by screening the beam pairs in the first area and the beam pairs in the adjacent area of the first area, wherein the first area is the area where the user side is located before the beam failure.
Embodiments of the present invention provide a non-transitory computer-readable storage medium, which stores computer instructions, where the computer instructions cause the computer to perform the methods provided by the above method embodiments, for example, the methods include: when receiving beam failure information sent by a user side, sequentially switching a current beam pair to one beam pair in an appointed beam pair set until the quality of service (QoS) of the switched beam pair is higher than a preset threshold value; the beam pairs in the designated beam pair set are obtained by screening the beam pairs in the first area and the beam pairs in the adjacent area of the first area, wherein the first area is the area where the user side is located before the beam failure.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A method for beam recovery in a millimeter wave communication system, the method comprising:
s1, when receiving the beam failure information sent by the user terminal, switching the current beam pair to one beam pair in the appointed beam pair set in sequence until the QoS of the switched beam pair is higher than the preset threshold;
the beam pair in the designated beam pair set is obtained by screening the beam pair of a first area and the beam pair of an adjacent area of the first area, wherein the first area is an area where the user side is located before the beam fails;
prior to step S1, the method further comprises:
searching all beam pairs of the first area, and acquiring QoS values of all beam pairs of the first area;
taking the beam pair with the highest QoS value in all the beam pairs of the first area as a direct path LOS beam pair of the first area, and taking the beam pair with the second highest QoS value in all the beam pairs of the first area as a non-direct path NLOS beam pair of the first area;
obtaining the LOS beam pair number of the first area and the NLOS beam pair number of the first area, and storing the LOS beam pair number of the first area and the NLOS beam pair number of the first area into a corresponding position in a beam table corresponding to a user side; the beam table corresponding to the user side stores the numbers and the corresponding relations of LOS beam pairs and NLOS beam pairs in all areas.
2. The method of claim 1, wherein the designated set of beam pairs includes at least LOS beam pairs of the first region, and wherein sequentially switching the current beam pair to one of the designated set of beam pairs comprises:
obtaining the LOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to a beam pair corresponding to the LOS beam pair number of the first area.
3. The method of claim 1, wherein the designated set of beam pairs includes at least NLOS beam pairs of the first region, and wherein sequentially switching the current beam pair to one of the designated set of beam pairs specifically comprises:
acquiring the NLOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to a beam pair corresponding to the NLOS beam pair number of the first area.
4. The method of claim 1, wherein the designated set of beam pairs includes at least LOS beam pairs of the neighboring area, and wherein sequentially switching the current beam pair to one of the designated set of beam pairs comprises:
inquiring to obtain the LOS beam pair number of the adjacent area according to the LOS beam pair number of the first area in a beam table corresponding to the user side;
and switching the current beam pair to the beam pair corresponding to the LOS beam pair number of the adjacent area.
5. The method of claim 1, wherein the designated set of beam pairs includes at least NLOS beam pairs of the neighboring area, and wherein sequentially switching the current beam pair to one of the designated set of beam pairs specifically includes:
inquiring to obtain the LOS beam pair number of the adjacent area according to the LOS beam pair number of the first area in a beam table corresponding to the user side;
inquiring to obtain the NLOS beam pair number of the adjacent area according to the LOS beam pair number of the adjacent area in a beam table corresponding to the user side;
and switching the current beam pair to the beam pair corresponding to the NLOS beam pair number of the adjacent area.
6. The method of claim 1, wherein the adjacent area comprises two areas, and is divided into a second area and a third area, the second area and the third area are respectively located on two sides of the first area, and the designated beam pair set at least comprises: a LOS beam pair of the first region, a NLOS beam pair of the first region, a LOS beam pair of the second region, a LOS beam pair of the third region, a NLOS beam pair of the second region, and a NLOS beam pair of the third region; the sequentially switching the current beam pair to one beam pair in the designated beam pair set specifically includes:
and sequentially switching the current beam pair to one of the LOS beam pair of the first region, the NLOS beam pair of the first region, the LOS beam pair of the second region, the LOS beam pair of the third region, the NLOS beam pair of the second region and the NLOS beam pair of the third region.
7. A beam recovery apparatus for a millimeter wave communication system, the apparatus comprising:
the switching module is used for sequentially switching the current beam pair to one beam pair in the appointed beam pair set when receiving the beam failure information sent by the user side until the QoS (quality of service) of the switched beam pair is higher than a preset threshold value;
the beam pair in the designated beam pair set is obtained by screening the beam pair of a first area and the beam pair of an adjacent area of the first area, wherein the first area is an area where the user side is located before the beam fails;
when receiving the beam failure information sent by the user side, sequentially switching the current beam pair to one of the designated beam pair sets until the quality of service QoS of the switched beam pair is higher than a preset threshold, where the beam recovery apparatus of the millimeter wave communication system is further configured to:
searching all beam pairs of the first area, and acquiring QoS values of all beam pairs of the first area;
taking the beam pair with the highest QoS value in all the beam pairs of the first area as a direct path LOS beam pair of the first area, and taking the beam pair with the second highest QoS value in all the beam pairs of the first area as a non-direct path NLOS beam pair of the first area;
obtaining the LOS beam pair number of the first area and the NLOS beam pair number of the first area, and storing the LOS beam pair number of the first area and the NLOS beam pair number of the first area into a corresponding position in a beam table corresponding to a user side; the beam table corresponding to the user side stores the numbers and the corresponding relations of LOS beam pairs and NLOS beam pairs in all areas.
8. An electronic device, characterized in that the electronic device comprises a memory, the memory storing a computer program comprising program instructions which, when executed by a computer, cause the computer to carry out the method according to any one of claims 1 to 6.
9. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 6.
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Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110034799B (en) | 2018-01-11 | 2023-09-01 | 华为技术有限公司 | Communication method and communication device |
| EP3737192B1 (en) | 2018-02-07 | 2023-10-25 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Method for link reconfiguration and terminal device |
| WO2019153708A1 (en) * | 2018-02-09 | 2019-08-15 | Huawei Technologies Co., Ltd. | System and method for periodic beam failure measurements |
| CN110149177B (en) * | 2018-02-12 | 2021-09-24 | 维沃移动通信有限公司 | Method for recovering beam failure, terminal equipment and network equipment |
| CN110149179B (en) * | 2018-02-12 | 2021-01-15 | 维沃移动通信有限公司 | Method and equipment for recovering beam failure |
| CN110167055B (en) * | 2018-02-13 | 2021-12-14 | 华为技术有限公司 | Method, device and system for beam failure detection |
| WO2019157664A1 (en) * | 2018-02-13 | 2019-08-22 | 富士通株式会社 | Resource selection method and apparatus for beam failure recovery, and communication system |
| WO2019157724A1 (en) | 2018-02-14 | 2019-08-22 | Oppo广东移动通信有限公司 | Wireless communication method and device |
| JP7100113B2 (en) * | 2018-02-19 | 2022-07-12 | 株式会社Ｎｔｔドコモ | Terminals, wireless communication methods, base stations and systems |
| CN111869124B (en) * | 2018-03-28 | 2022-04-05 | 华为技术有限公司 | Apparatus, method, and computer program for bidirectional beam failure recovery in wireless communications |
| CN110324914B (en) * | 2018-03-28 | 2021-03-23 | 维沃移动通信有限公司 | Processing method and terminal for beam failure |
| CN110351756B (en) * | 2018-04-04 | 2021-03-19 | 维沃移动通信有限公司 | Beam failure recovery method, terminal, network device and computer storage medium |
| CN110401501A (en) * | 2018-04-24 | 2019-11-01 | 索尼公司 | For the electronic equipment of wireless communication system, method and storage medium |
| WO2019213873A1 (en) * | 2018-05-09 | 2019-11-14 | Oppo广东移动通信有限公司 | Radio communication method and terminal |
| CN110475276B (en) * | 2018-05-10 | 2023-11-07 | 夏普株式会社 | Link evaluation method in user equipment and user equipment |
| CN110475353B (en) * | 2018-05-11 | 2022-06-28 | 华为技术有限公司 | Method and device for link recovery |
| CN110475337B (en) | 2018-05-11 | 2020-11-06 | 成都华为技术有限公司 | Communication method and device |
| CN110505692B (en) | 2018-05-16 | 2022-02-22 | 维沃移动通信有限公司 | Beam failure recovery method and device in multi-carrier system |
| CN110536419B (en) * | 2018-05-23 | 2023-04-18 | 中兴通讯股份有限公司 | Beam recovery method and device |
| WO2020012619A1 (en) * | 2018-07-12 | 2020-01-16 | 株式会社Ｎｔｔドコモ | User equipment |
| CN109076619B (en) * | 2018-07-16 | 2022-07-22 | 北京小米移动软件有限公司 | Random access control method and random access control device |
| CN110536429B (en) * | 2018-08-10 | 2023-04-18 | 中兴通讯股份有限公司 | Through link beam management method, device, equipment and readable storage medium |
| CN110535588B (en) | 2018-09-21 | 2023-04-11 | 中兴通讯股份有限公司 | Method, device, equipment, system and storage medium for controlling execution of configuration signaling |
| TWI735043B (en) * | 2018-09-28 | 2021-08-01 | 聯發科技股份有限公司 | Electronic device and method for beam failure recovery |
| CN110972171B (en) * | 2018-09-28 | 2022-05-06 | 维沃移动通信有限公司 | Beam failure recovery request transmission method, terminal equipment and network equipment |
| WO2020087214A1 (en) * | 2018-10-29 | 2020-05-07 | 北京小米移动软件有限公司 | Method and apparatus for controlling beam failure recovery procedure |
| CN111836279B (en) * | 2019-08-23 | 2022-07-15 | 维沃移动通信有限公司 | Processing method and terminal for beam failure |
| CN113905393B (en) * | 2020-06-22 | 2023-03-24 | 华为技术有限公司 | Method and device for determining beam pair |
| CN111988825B (en) * | 2020-08-31 | 2021-06-29 | 西安电子科技大学 | Mode selection and switching method in dual-frequency integrated system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005076934A3 (en) * | 2004-02-05 | 2007-08-23 | Interdigital Tech Corp | Measurement opportunities for a mobile unit operating with a switched beam antenna in a cdma system |
| CN103237319A (en) * | 2008-03-11 | 2013-08-07 | 英特尔公司 | Method and apparatus of connectivity recovery in a wireless network |
| CN103517376A (en) * | 2012-06-29 | 2014-01-15 | 华为技术有限公司 | Communication restoring method and communication terminal |
| CN104115419A (en) * | 2011-12-16 | 2014-10-22 | 三星电子株式会社 | Methods and apparatus to enhance reliability in millimeter wave wideband communications |
| CN104618964A (en) * | 2015-01-15 | 2015-05-13 | 青岛科技大学 | Switching beam forming-based millimeter wave cooperative communication method |
| CN106063345A (en) * | 2014-03-27 | 2016-10-26 | 英特尔Ip公司 | Apparatus, system and method of selecting a wireless communication channel |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9578644B2 (en) * | 2014-09-26 | 2017-02-21 | Mediatek Inc. | Beam misalignment detection for wireless communication system with beamforming |
-
2017
- 2017-08-28 CN CN201710751648.6A patent/CN107612602B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005076934A3 (en) * | 2004-02-05 | 2007-08-23 | Interdigital Tech Corp | Measurement opportunities for a mobile unit operating with a switched beam antenna in a cdma system |
| CN103237319A (en) * | 2008-03-11 | 2013-08-07 | 英特尔公司 | Method and apparatus of connectivity recovery in a wireless network |
| CN104115419A (en) * | 2011-12-16 | 2014-10-22 | 三星电子株式会社 | Methods and apparatus to enhance reliability in millimeter wave wideband communications |
| CN103517376A (en) * | 2012-06-29 | 2014-01-15 | 华为技术有限公司 | Communication restoring method and communication terminal |
| CN106063345A (en) * | 2014-03-27 | 2016-10-26 | 英特尔Ip公司 | Apparatus, system and method of selecting a wireless communication channel |
| CN104618964A (en) * | 2015-01-15 | 2015-05-13 | 青岛科技大学 | Switching beam forming-based millimeter wave cooperative communication method |
Non-Patent Citations (4)
| Title |
|---|
| Contention Based Fast Beam Switching Scheme in Millimeter-wave Cellular Systems;Nak Woon Sung等;《International Conference on Advanced Communication Technology》;20150827;全文 * |
| On UE Initiated Beam Recovery;Intel Corporation;《TSGR1_AH》;20170110;全文 * |
| 多波束切换技术在船载卫星通信系统中的应用;黎敏;《舰船科学技术》;20160723;第38卷(第7A期);全文 * |
| 多波束测控系统目标快速切换方法研究;单福悦等;《无线电工程》;20170605;第47卷(第6期);全文 * |
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