CN110650523B

CN110650523B - Random access power control method and device

Info

Publication number: CN110650523B
Application number: CN201810672740.8A
Authority: CN
Inventors: 袁世通; 严乐; 李铕; 彭文杰; 戴明增
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-06-26
Filing date: 2018-06-26
Publication date: 2021-07-09
Anticipated expiration: 2038-06-26
Also published as: CN110650523A

Abstract

If the UE performs random access on the first access network equipment, the first access network equipment can measure an uplink detection signal and feed back the measurement result to the UE so that the UE can determine reasonable sending power for initiating Preamble according to the uplink measurement result; or, the UE accurately determines the reasonable sending power for initiating the Preamble according to the RSRP of the downlink signal and the targeted compensation value, thereby avoiding the problem that the determined sending power is not appropriate because the downlink path loss is directly taken as the uplink path loss.

Description

Random access power control method and device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a power control method and apparatus for random access.

Background

When a User Equipment (UE) accesses a network device, the UE needs to initiate a random access to establish a connection with the network device. Since there is path loss in signal transmission between the UE and the network device, in order to make the power of a random access Preamble (Preamble) sent by the UE reaching the network device reach a preset value or higher, the UE needs to compensate the path loss to the sending power of the Preamble. For this purpose, the UE may calculate a path loss of a Signal sent by the network device to the UE by measuring a Reference Signal Received Power (RSRP) of the Signal sent by the network device, so as to compensate the path loss to the transmission Power of the Preamble.

In some cases, a downlink carrier used for the network device to send a signal to the UE and an uplink carrier used for the UE to send a Preamble to the network device may be different carriers. The signals transmitted on the downlink carrier and the uplink carrier may have different physical properties. Therefore, the path loss on the downlink carrier and the uplink carrier may have a large difference, that is, the path loss of the signal sent by the network device to the UE is greatly different from the path loss of the Preamble sent by the UE to the network device. Therefore, if the path loss of the signal sent by the network device to the UE is compensated to the sending power of the Preamble, it is difficult for the UE to accurately determine the appropriate sending power for the Preamble, so the UE often uses too large or too small power to initiate random access, which causes interference and power loss when the power is too large, and causes random access failure when the power is too small.

Disclosure of Invention

The technical problem to be solved in the embodiments of the present application is to provide a method and an apparatus for controlling random access power, so that a UE can accurately determine an appropriate transmission power for a Preamble, thereby ensuring that the UE transmits the Preamble with the appropriate transmission power to perform effective random access.

A first aspect of an embodiment of the present application provides a power control method for random access, which stands at a first access network device, and includes:

the first access network equipment receives configuration information of target uplink measurement resources sent by the second access network equipment; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, and a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier; the first access network equipment receives an uplink detection signal sent by User Equipment (UE) through a first uplink carrier by using the target uplink measurement resource; the first access network equipment measures the uplink detection signal according to the configuration information of the target uplink measurement resource to obtain a measurement result; the first access network equipment sends the measurement result to the UE through the second access network equipment; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier. In the embodiment of the application, the reasonable sending power for initiating the Preamble is determined according to the uplink measurement result, and the problem that the determined sending power is not appropriate because the downlink path loss is directly taken as the uplink path loss is solved, so that the UE can effectively send the Preamble to the first access network device to be randomly accessed by using the sending power, and the probability of accessing the UE to the first access network device is improved.

In some possible implementation manners, the method further includes a process of determining configuration information of the target uplink measurement resource, which may specifically be: the first access network equipment receives an uplink measurement resource request sent by the second access network equipment; the first access network equipment allocates initial uplink measurement resources for the uplink measurement resource request and sends indication information of the initial uplink measurement resources to the second access network equipment; wherein the target uplink measurement resource is determined from the initial uplink measurement resource. Therefore, through information interaction between the first access network equipment and the second access network equipment, target uplink measurement resources required in subsequent uplink path measurement can be determined, and a data basis is provided for subsequent measurement.

In some possible implementation manners, the configuration information of the target uplink measurement resource may be carried in different information sent by the second access network device to the first access network device, specifically including but not limited to: in one case, configuration information of a target uplink measurement resource is carried in a handover request sent by the second access network device to the first access network device, where the handover request is used to request that the UE is handed over from the second access network device to the first access network device, the measurement result is carried in a handover instruction sent by the first access network device to the UE through the second access network device, and the handover instruction is used to instruct the UE to handover from the second access network device to the first access network device; in another case, the configuration information of the target uplink measurement resource is carried in an auxiliary station adding request sent by the second access network device to the first access network device, where the auxiliary station adding request is used to request to re-access the first access network device when the UE has accessed the second access network device, the measurement result is carried in an auxiliary station adding instruction sent by the first access network device to the UE through the second access network device, and the auxiliary station adding instruction is used to instruct the UE to re-access the first access network device when the UE has accessed the second access network device.

Accordingly, a second aspect of the embodiments of the present application provides a power control method for random access, which stands at the perspective of a second access network device, and includes:

the second access network equipment sends the configuration information of the target uplink measurement resource to the first access network equipment and the user equipment UE; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier; the second access network equipment receives a measurement result obtained by the first access network equipment measuring the uplink detection signal according to the configuration information of the target uplink measurement resource; wherein the uplink sounding signal is sent by the UE to the first access network device through the first uplink carrier by using the target uplink measurement resource; the second access network equipment sends the measurement result to the UE; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

In some possible implementation manners, the method further includes a process of determining configuration information of the target uplink measurement resource, which may specifically be: the second access network equipment sends an uplink measurement resource request to the first access network equipment; the second access network equipment receives indication information of initial uplink measurement resources allocated to the uplink measurement resource request by the first access network equipment; and the second access network equipment determines the target uplink measurement resource from the initial uplink measurement resource.

In some possible implementation manners, the configuration information of the target uplink measurement resource may be carried in different information sent by the second access network device to the first access network device, specifically including but not limited to: in one case, the configuration information of the target uplink measurement resource is carried in a handover request sent by the second access network device to the first access network device, where the handover request is used to request that the UE is handed over from the second access network device to the first access network device, the measurement result is carried in a handover instruction sent by the first access network device to the UE through the second access network device, and the handover instruction is used to instruct the UE to handover from the second access network device to the first access network device; in another case, the configuration information of the target uplink measurement resource is carried in an auxiliary station adding request sent by the second access network device to the first access network device, where the auxiliary station adding request is used to request to re-access the first access network device when the UE has accessed the second access network device, the measurement result is carried in an auxiliary station adding instruction sent by the first access network device to the UE through the second access network device, and the auxiliary station adding instruction is used to instruct the UE to re-access the first access network device when the UE has accessed the second access network device.

Accordingly, a third aspect of the embodiments of the present application provides a power control method for random access, where a station is from a UE perspective, and the method includes:

user Equipment (UE) receives configuration information of a target uplink measurement resource sent by second access network equipment; the UE sends an uplink detection signal to first access network equipment through a first uplink carrier by using the target uplink measurement resource according to the configuration information; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier; the UE receives a measurement result sent by the second access network device, wherein the measurement result is obtained by the first access network device measuring the uplink detection signal according to the configuration information; and the UE determines to initiate the sending power of the random access preamble to the first access network equipment through the first uplink carrier according to the measurement result.

It can be seen that, in the embodiment of the present application, if the UE performs random access to the first access network device, the first access network device may determine, by receiving an uplink sounding signal sent on the first uplink carrier, and measures the uplink probing signal to obtain an uplink measurement result for the first uplink carrier, and feeds back the uplink measurement result to the UE, the UE determines reasonable sending power for initiating the Preamble according to the uplink measurement result, the problem that the determined sending power is not appropriate due to the fact that the downlink path loss is directly used as the uplink path loss and the difference of the uplink path loss and the downlink path loss caused by the fact that carriers with different frequencies are ignored is solved, the appropriate UE determined by the technical scheme of the embodiment of the application initiates the sending power of the Preamble, the UE can effectively send the Preamble to the first access network equipment to be randomly accessed by using the sending power, and therefore the probability that the UE accesses the first access network equipment is improved.

In addition, a fourth aspect of the embodiments of the present application provides a power control method for random access, where a station is from a UE perspective, and the method includes:

user Equipment (UE) measures a downlink signal sent by the first access network equipment through a downlink carrier to obtain target Reference Signal Received Power (RSRP) of the downlink signal and receive sending power of the downlink signal; the UE searches a target compensation value corresponding to the target RSRP in a preset target corresponding relation; and the UE determines the sending power for initiating random access to the first access network equipment through a first uplink carrier according to the target RSRP, the sending power of the downlink signal and the target compensation value. Wherein, a cell of the first access network device includes the downlink carrier and the first uplink carrier and the second uplink carrier corresponding to the downlink carrier, and the frequency of the first uplink carrier is smaller than that of the second uplink carrier.

In some possible implementations, if a plurality of preset correspondences are preset, the method further includes: and the UE receives the corresponding relation identification sent by the first access network equipment, and searches a preset corresponding relation corresponding to the corresponding relation identification in a plurality of preset corresponding relations preset by the UE to be used as the target preset corresponding relation.

As some possible examples, the correspondence identifier may be sent to the UE through many information, and specific sending manners include, but are not limited to: in one case, the corresponding relationship identifier is carried in a radio resource control RRC signaling sent by the first access network device to the UE; in another case, the corresponding relationship identifier is carried in a switching instruction or an auxiliary station adding instruction sent by the first access network device to the UE through the second access network device, where the switching instruction is used to instruct the UE to switch from the second access network device to the first access network device, and the auxiliary station adding instruction is used to instruct the UE to access the first access network device again when the UE has accessed the second access network device.

Accordingly, a fifth aspect of the embodiments of the present application provides a power control method for random access, which stands at the perspective of a first access network device, and includes:

the method comprises the steps that first access network equipment sends downlink signals to User Equipment (UE) through downlink carriers and sends sending power of the downlink signals to the UE; the first access network equipment sends a corresponding relation identifier to the UE; the corresponding relation identifier corresponds to a target corresponding relation in a plurality of preset corresponding relations preset by the UE, and the target Reference Signal Received Power (RSRP) of the downlink signal corresponds to a target compensation value in the target preset corresponding relation; the target RSRP, the transmission power of the downlink signal, and the target compensation value are used to instruct the UE to determine the transmission power for initiating random access to the first access network device through the first uplink carrier. Wherein, a cell of the first access network device includes the downlink carrier and the first uplink carrier and the second uplink carrier corresponding to the downlink carrier, and the frequency of the first uplink carrier is smaller than that of the second uplink carrier.

Therefore, in the embodiment of the present application, different compensation values are correspondingly set for different measurement results of a downlink signal in advance, and if the UE performs random access to the first access network device, the UE performs targeted compensation on the measurement results of the downlink signal under different conditions after receiving the measurement result of the downlink signal sent by the first access network device, so that the path loss of the uplink probe signal can be estimated by using the measurement result of the downlink signal and the corresponding compensation value in an approximate manner, and then, according to the transmission power of the downlink signal, the measurement result of the downlink signal and the corresponding compensation value, the appropriate transmission power for sending the Preamble is determined, thereby improving the probability of accessing the UE to the first access network device.

In addition, a sixth aspect of the embodiments of the present application provides a power control apparatus for random access, where the power control apparatus is a first access network device, and includes:

a first receiving unit, configured to receive configuration information of a target uplink measurement resource sent by a second access network device; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

a second receiving unit, configured to receive an uplink sounding signal sent by the UE through the first uplink carrier by using the target uplink measurement resource;

a measurement unit, configured to measure the uplink sounding signal according to the configuration information of the target uplink measurement resource, so as to obtain a measurement result;

a first sending unit, configured to send the measurement result to the UE through the second access network device; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

In some possible implementations, the apparatus further includes:

a third receiving unit, configured to receive an uplink measurement resource request sent by the second access network device;

a second sending unit, configured to allocate an initial uplink measurement resource for the uplink measurement resource request and send indication information of the initial uplink measurement resource to the second access network device; wherein the target uplink measurement resource is determined from the initial uplink measurement resource. Therefore, through information interaction between the first access network equipment and the second access network equipment, target uplink measurement resources required in subsequent uplink path measurement can be determined, and a data basis is provided for subsequent measurement.

Correspondingly, a seventh aspect of the embodiments of the present application provides a power control device for random access, where the power control device is a second access network device, and includes:

a first sending unit, configured to send configuration information of a target uplink measurement resource to a first access network device and a user equipment UE; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

a first receiving unit, configured to receive a measurement result obtained by the first access network device measuring the uplink sounding signal according to the configuration information of the target uplink measurement resource; wherein the uplink sounding signal is sent by the UE to the first access network device through the first uplink carrier by using the target uplink measurement resource;

a second sending unit, configured to send the measurement result to the UE; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

In some possible implementations, the apparatus further includes:

a third sending unit, configured to send an uplink measurement resource request to the first access network device; the second access network equipment receives indication information of initial uplink measurement resources allocated to the uplink measurement resource request by the first access network equipment;

a determining unit, configured to determine the target uplink measurement resource from the initial uplink measurement resource.

Correspondingly, an eighth aspect of the embodiments of the present application provides a power control apparatus for random access, where the power control apparatus is a user equipment UE, and the power control apparatus includes:

a first receiving unit, configured to receive configuration information of a target uplink measurement resource sent by a second access network device;

a sending unit, configured to send an uplink sounding signal to a first access network device through a first uplink carrier by using the target uplink measurement resource according to the configuration information; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

a second receiving unit, configured to receive a measurement result sent by the second access network device, where the measurement result is obtained by the first access network device measuring the uplink sounding signal according to the configuration information;

and the UE determines to initiate the sending power of the random access preamble to the first access network equipment through the first uplink carrier according to the measurement result.

The foregoing is an introduction to the power control apparatus for random access provided in this embodiment, and a specific implementation manner may refer to descriptions in the embodiments of the power control methods for random access provided in the first to third aspects, so that an effect achieved is consistent with the foregoing method embodiments, and details are not described here.

In addition, a ninth aspect of the embodiments of the present application provides a power control apparatus for random access, where the power control apparatus is a user equipment UE, and the power control apparatus includes:

the device comprises a measuring unit, a receiving unit and a processing unit, wherein the measuring unit is used for measuring a downlink signal sent by first access network equipment through a downlink carrier to obtain a target Reference Signal Received Power (RSRP) of the downlink signal;

a receiving unit, configured to receive the transmission power of the downlink signal;

the searching unit is used for searching a target compensation value corresponding to the target RSRP in a preset corresponding relation of the target;

a determining unit, configured to determine, according to the target RSRP, the transmit power of the downlink signal, and the target compensation value, a transmit power for initiating a random access to the first access network device through a first uplink carrier;

wherein, a cell of the first access network device includes the downlink carrier and the first uplink carrier and the second uplink carrier corresponding to the downlink carrier, and the frequency of the first uplink carrier is smaller than that of the second uplink carrier.

In some possible implementations, if a plurality of preset correspondences are preset, the apparatus further includes:

a second searching unit, configured to receive the correspondence identifier sent by the first access network device, and search, in a plurality of preset correspondences preset by the UE, a preset correspondence corresponding to the correspondence identifier, where the preset correspondence is used as the target preset correspondence.

Accordingly, a tenth aspect of the embodiments of the present application provides a power control apparatus for random access, where the power control apparatus is a first access network device, and includes:

a first sending unit, configured to send a downlink signal to a user equipment UE through a downlink carrier, and send a sending power of the downlink signal to the UE;

a second sending unit, configured to send a mapping relationship identifier to the UE;

the corresponding relation identifier corresponds to a target corresponding relation in a plurality of preset corresponding relations preset by the UE, and the target Reference Signal Received Power (RSRP) of the downlink signal corresponds to a target compensation value in the target preset corresponding relation;

the target RSRP, the sending power of the downlink signal and the target compensation value are used for indicating the UE to determine the sending power for initiating random access to the first access network equipment through the first uplink carrier;

The foregoing is a description of the power control apparatus for random access provided in the embodiment of the present application, and specific implementation manners may refer to descriptions in the embodiments of the power control methods for random access provided in the fourth aspect to the fifth aspect, so that effects achieved by the embodiments of the methods are consistent with those of the embodiments of the methods, and are not described herein again.

In addition, an eleventh aspect of an embodiment of the present application provides a power control apparatus for random access, where the power control apparatus is a first access network device, and includes a processor and a transceiver;

the processor is configured to read software instructions in the memory, execute the software instructions to:

driving the transceiver to receive configuration information of the target uplink measurement resource sent by the second access network equipment; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

driving the transceiver to receive an uplink detection signal sent by User Equipment (UE) through the first uplink carrier by using the target uplink measurement resource;

measuring the uplink detection signal according to the configuration information of the target uplink measurement resource to obtain a measurement result;

driving the transceiver to send the measurement result to the UE through the second access network device; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

In some possible implementations, the processor is configured to read software instructions in the memory, and further execute the software instructions to implement the following operations:

driving the transceiver to receive an uplink measurement resource request sent by the second access network device;

allocating initial uplink measurement resources for the uplink measurement resource request and sending indication information of the initial uplink measurement resources to the second access network equipment; wherein the target uplink measurement resource is determined from the initial uplink measurement resource. Therefore, through information interaction between the first access network equipment and the second access network equipment, target uplink measurement resources required in subsequent uplink path measurement can be determined, and a data basis is provided for subsequent measurement.

Correspondingly, a twelfth aspect of an embodiment of the present application provides a power control apparatus for random access, where the power control apparatus is a second access network device, and includes a processor and a transceiver;

driving the transceiver to send configuration information of target uplink measurement resources to first access network equipment and User Equipment (UE); a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

driving the transceiver to receive a measurement result obtained by the first access network device measuring the uplink sounding signal according to the configuration information of the target uplink measurement resource; wherein the uplink sounding signal is sent by the UE to the first access network device through the first uplink carrier by using the target uplink measurement resource;

driving the transceiver to transmit the measurement result to the UE; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

driving the transceiver to send an uplink measurement resource request to the first access network device; the second access network equipment receives indication information of initial uplink measurement resources allocated to the uplink measurement resource request by the first access network equipment;

and determining the target uplink measurement resource from the initial uplink measurement resource.

Correspondingly, a thirteenth aspect of an embodiment of the present application provides a power control apparatus for random access, where the power control apparatus is a user equipment UE, and includes a processor and a transceiver;

driving the transceiver to receive configuration information of the target uplink measurement resource sent by the second access network equipment;

driving the transceiver to transmit an uplink detection signal to first access network equipment through a first uplink carrier by using the target uplink measurement resource according to the configuration information; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

driving the transceiver to receive a measurement result sent by the second access network device, where the measurement result is obtained by the first access network device measuring the uplink sounding signal according to the configuration information;

and determining the sending power of the random access preamble initiated to the first access network equipment by the first uplink carrier according to the measurement result.

In addition, a fourteenth aspect of an embodiment of the present application provides a power control apparatus for random access, where the power control apparatus is a user equipment UE, and includes a processor and a transceiver;

measuring a downlink signal sent by first access network equipment through a downlink carrier to obtain a target Reference Signal Received Power (RSRP) of the downlink signal;

driving the transceiver to receive the transmission power of the downlink signal;

searching a target compensation value corresponding to the target RSRP in a preset corresponding relation of the target;

determining the sending power for initiating random access to the first access network equipment through a first uplink carrier according to the target RSRP, the sending power of the downlink signal and the target compensation value;

and driving the transceiver to receive the corresponding relationship identifier sent by the first access network device, and searching a preset corresponding relationship corresponding to the corresponding relationship identifier in a plurality of preset corresponding relationships preset by the UE to be used as the target preset corresponding relationship.

Correspondingly, a fifteenth aspect of an embodiment of the present application provides a power control apparatus for random access, where the power control apparatus is a first access network device, and includes a processor and a transceiver;

driving the transceiver to transmit a downlink signal to User Equipment (UE) through a downlink carrier, and transmitting the transmission power of the downlink signal to the UE;

driving the transceiver to send a corresponding relation identifier to the UE;

A sixteenth aspect of embodiments of the present application provides a computer-readable storage medium, which includes instructions that, when executed on a computer, cause the computer to perform the power control method for random access provided in any one of the first to fifth aspects.

A seventeenth aspect of embodiments of the present application provides a computer program product containing instructions, which when run on a computer, causes the computer to perform the power control method for random access provided in any one of the first to fifth aspects.

An eighteenth aspect of the present embodiment provides a random access power control system, which includes the foregoing first access network device, second access network device, and user equipment UE.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic diagram of a system framework involved in an application scenario in an embodiment of the present application;

fig. 2 is a flowchart illustrating a power control method for random access according to an embodiment of the present disclosure;

fig. 3 is a flowchart illustrating an example of a power control method for random access in an embodiment of the present application;

fig. 4 is a flowchart illustrating a further example of a power control method for random access in the embodiment of the present application;

fig. 5 is a flowchart illustrating a further example of a power control method for random access in an embodiment of the present application;

fig. 6 is a flowchart illustrating another example of a power control method for random access in an embodiment of the present application;

fig. 7 is a flowchart illustrating an example of a power control method for random access in an embodiment of the present application;

fig. 8 is a flowchart illustrating a further example of a power control method for random access in the embodiment of the present application;

fig. 9 is a flowchart illustrating a further example of a power control method for random access in the embodiment of the present application;

fig. 10 is a flowchart illustrating another example of a power control method for random access in the embodiment of the present application;

fig. 11 is a flowchart illustrating a further example of a power control method for random access in the embodiment of the present application;

fig. 12 is a flowchart illustrating a further example of a power control method for random access in the embodiment of the present application;

fig. 13 is a flowchart illustrating a further example of a power control method for random access in the embodiment of the present application;

fig. 14 is a flowchart illustrating a further example of a power control method for random access in the embodiment of the present application;

FIG. 15 is a system framework diagram according to another application scenario in the embodiment of the present application;

fig. 16 is a flowchart illustrating another random access power control method according to an embodiment of the present application;

fig. 17 is a schematic structural diagram of a random access power control apparatus according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of another random access power control apparatus according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a further random access power control apparatus according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of another random access power control apparatus according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of another random access power control apparatus according to an embodiment of the present application;

fig. 22 is a schematic hardware structure diagram of a random access power control apparatus according to an embodiment of the present application;

fig. 23 is a schematic structural diagram of a random access power control system according to an embodiment of the present application.

Detailed Description

When the UE accesses the network device, the UE needs to send a random access Preamble (Preamble) that can be received by the network device to the network device. It can be understood that the condition that the Preamble sent by the UE can be received by the network device is as follows: the power of the Preamble reaching the network device is not less than the preset value, and considering that there is path loss when the UE sends the Preamble to the network device, the UE is required to compensate the uplink path loss when the UE sends a signal to the network device into the sending power for sending the Preamble on the basis of the preset value, that is, the sending power for sending the Preamble by the UE is not less than the sum of the preset value and the uplink path loss, so as to ensure that the receiving power for receiving the Preamble by the network device is not less than the preset value.

At present, if the uplink carrier used by the UE to send a signal to the network device and the downlink carrier used by the network device to send a signal to the UE both use carriers of the same frequency band, then it can be considered that the path loss of the transmission signal between the UE and the network device is approximately the same, that is, the uplink path loss of the signal sent by the UE to the network device is equal to the downlink path loss of the signal sent by the network device to the UE. When determining the sending power of the Preamble sent by the UE, the UE may directly measure the RSRP of the downlink signal sent by the network device, calculate the downlink path loss of the signal sent by the network device to the UE according to the measured RSRP, and generate the uplink path loss when the UE sends the uplink signal to the network device, so as to compensate the downlink path loss to a preset value, and determine the sending power of the Preamble sent by the UE.

However, in some cases, when a cell is equipped with an uplink carrier corresponding to a frequency band of a downlink carrier, the network device may not receive a signal transmitted by a UE that is far away from the network device due to low transmission power of the UE. In order to overcome this problem, a lower-frequency uplink carrier may be introduced, that is, a cell is equipped with a pair of higher-frequency uplink and downlink carriers and at least one lower-frequency uplink carrier, and since the transmission capability of the lower-frequency carrier is stronger, even if the UE transmits a signal to a network device that is far away through the first uplink carrier of the lower frequency, the signal can be received by the network device.

For example, in a 5G Radio Access Technology in 3GPP (5G-NR) scenario, a cell is configured with a high-frequency downlink carrier (NR DL carrier), a high-frequency uplink carrier (NR UL carrier) corresponding to the NR DL carrier, and a low-frequency uplink carrier (SUL carrier). In the 5G-NR scenario, if the UE sends the Preamble to the network device through the SUL carrier, at this time, because the frequency of the downlink carrier used by the network device to send the downlink signal to the UE is different from the frequency of the uplink carrier used by the UE to send the Preamble to the network device, the uplink path loss and the downlink path loss are different, then, if the existing manner is sampled, the downlink path loss is directly regarded as the uplink path loss to compensate to the preset value, it is determined that the sending power of the Preamble sent by the UE is probably not appropriate, and then the problem may occur when the Preamble is sent to the network device with the inappropriate sending power. On one hand, if the determined sending power is too small, the power of the Preamble received by the network equipment is smaller than a preset value, so that the random access is failed; on the other hand, if the determined transmission power is too large, interference and power loss are easily caused.

Based on this, the embodiment of the present application provides a random access power control method, which can determine a more appropriate sending power for sending a Preamble for a UE, so that the UE can effectively send the Preamble to a first access network device, and improve the probability that the UE successfully accesses the first access network device, compared with the case that the UE directly compensates the downlink path loss to a preset value, measures the uplink path loss and compensates the uplink path loss to the preset value. The following describes an implementation manner of a function control method for random access provided in an embodiment of the present application.

In a first possible implementation manner, if the UE has accessed the second access network device and the UE wants to randomly access the first access network device, in order to overcome the problem that the determined transmission power is not appropriate due to the fact that the UE performs approximate calculation on the transmission power by using a downlink measurement result instead of an uplink signal, the first access network device (e.g., a target base station) may measure an uplink probing signal sent by the UE according to configuration information of a target uplink measurement resource sent by the second access network device to obtain an uplink measurement result, and feed the uplink measurement result back to the UE, and the UE determines the appropriate transmission power for sending a Preamble according to the uplink measurement result corresponding to the uplink probing signal, thereby improving the probability that the UE accesses the first access network device. Reference is made in particular to the description of the corresponding embodiment of fig. 1.

In a second possible implementation manner, the corresponding relationship between different measurement results of the downlink signal and different compensation values may be preset in advance, and if the UE is to perform random access to the first access network device, the UE may search for a compensation value corresponding to the measurement result of the downlink signal, and according to the transmission power of the downlink signal, the measurement result of the downlink signal, and the corresponding compensation value, the uplink path loss obtained by the estimation is closer to the uplink path loss than the downlink measurement result obtained by direct measurement, and may be approximately regarded as the uplink path loss, and it is determined that the transmission power for sending the Preamble is more appropriate, thereby improving the probability that the UE accesses the target access network device. Reference is made in particular to the description of the embodiment corresponding to fig. 15.

The following describes, by way of embodiments, a specific implementation manner of the power control method for random access provided in the embodiments of the present application in detail with reference to the accompanying drawings.

For example, corresponding to the first possible implementation manner, one of the scenarios in the embodiment of the present application may be applied to the scenario shown in fig. 1. In this scenario, the second access network device 120 is connected to the UE 130, and power control of the first access network device 110 randomly accessing the UE 130 is implemented. Data interaction between first access network device 110 and second access network device 120, between first access network device 110 and UE 130, and between second access network device 120 and UE 130 may be performed through a wireless network. A cell of the first access network device 110 includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier.

The specific random access control scheme may include: first, second access network device 120 sends configuration information of target uplink measurement resources to first access network device 110; UE 130 sends an uplink sounding signal to first access network device 110 through a first uplink carrier with a higher frequency by using a target uplink measurement resource; then, the first access network device 110 measures the received uplink probing signal according to the configuration information of the target uplink measurement resource to obtain a measurement result; then, the first access network device 110 sends the measurement result to the UE 130 through the second access network device 120, so as to instruct the UE 130 to determine to initiate Preamble sending power to the first access network device 110 through the first uplink carrier.

It is to be understood that the above scenario is only one example of a scenario provided in the embodiment of the present application, and the embodiment of the present application is not limited to this scenario.

Fig. 2 is a flowchart illustrating a power control method for random access in an embodiment of the present application. Referring to fig. 2, the method for controlling power of random access corresponds to the first possible implementation manner, and specifically includes the following steps 201 to 206:

step 201, the second access network device sends configuration information of target uplink measurement resources to the first access network device; wherein, a cell of the first access network device includes a downlink carrier and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, and the frequency of the first uplink carrier is smaller than that of the second uplink carrier.

In a 5G-NR scenario, a cell is configured with one downlink carrier and two uplink carriers, where the downlink carrier NR DL carrier and the second uplink carrier NR UL carrier are a pair of high frequency carriers, and the first uplink carrier SUL carrier is a low frequency carrier with a frequency lower than the frequencies of the downlink carrier NR DL carrier and the second uplink carrier NR UL carrier, for example, the second uplink carrier NR UL carrier and the downlink carrier NR DL carrier may be high frequency carriers, and the frequency may be higher than 6GHz, or even as high as 28GHz, but the first uplink carrier SUL carrier may be a low frequency carrier, and the frequency may be lower than 2 GHz. If the UE sends the Preamble to the first access network device through the first uplink carrier SUL carrier, at this time, due to the difference between uplink and downlink carrier frequencies, the uplink path loss of the UE needs to be measured because the downlink path loss cannot be used to replace the uplink path loss to compensate the preset value.

It can be understood that the first access network device and the second access network device may be two base stations, for example, where the UE has currently accessed to the second access network device, the second access network device is a source access network device that can perform normal communication with the UE, and the UE is not currently accessed to the first access network device, and the UE needs to perform random access to the first access network device, and the first access network device belongs to a target access network device.

In specific implementation, the target uplink measurement resource refers to a time-frequency resource that needs to be utilized when an uplink probe signal is sent to a first access network device (i.e., a target access network device) by the UE, where the uplink probe signal is used to measure RSRP. And the configuration information of the target uplink measurement resource is used for configuring the time-frequency resource for the UE to send the uplink detection signal through the first uplink carrier. The configuration information of the target uplink measurement resource may specifically include: firstly, controlling and allocating a cell level Sounding Reference Signal (SRS) time domain resource, wherein the cell level SRS time domain resource comprises a time domain expansion and contraction mechanism and a frequency domain adjustment mechanism of a cell level SRS subframe; second, allocation of user-level SRS resources: time domain configuration, bandwidth configuration, code domain configuration, etc.

The target uplink measurement resource and the configuration information of the target uplink measurement resource may be specifically determined by the second access network device through information interaction between the first access network device and the second access network device before step 201 is executed. Specifically, determining the target uplink measurement resource may include: firstly, the second access network equipment sends an uplink measurement resource request to the first access network equipment; then, the first access network equipment allocates initial uplink measurement resources for the received uplink measurement resource request, and sends indication information of the initial uplink measurement resources to the second access network equipment; then, the second access network device determines a target uplink measurement resource from the received initial uplink measurement resource.

It can be understood that the indication information of the initial uplink measurement resource is indication information generated by the first access network device for the initial uplink measurement resource, so that the second access network device determines the initial uplink measurement resource according to the indication information of the initial uplink measurement resource.

As an example, the initial uplink measurement resource may be specified by a first access network device, and then the uplink measurement resource request may be a resource configuration request, the first access network device sends a resource configuration request to a second access network device, and the first access network device configures a first uplink measurement resource in response to the resource configuration request, and sends configuration information of the first uplink measurement resource as configuration information of the initial uplink measurement resource to the second access network device, so that the second access network device determines a target uplink measurement resource from the first uplink measurement resource by using the received first uplink measurement resource as the initial uplink measurement resource.

As another example, the initial uplink measurement resource may also be specified by the second access network device and acknowledged by the first access network device, then the uplink measurement resource request may be a configured resource acknowledgement request, the second access network device has configured the second uplink measurement resource, and sends the configured resource acknowledgement request to the first access network device, requesting the first access network device to acknowledge whether the configured uplink measurement resource can be utilized, and if so, the first access network device sends an acknowledgement response message Ack to the second access network device as configuration information of the initial uplink measurement resource, instructing the second access network device to determine a target uplink measurement resource from the configured second uplink measurement resource (i.e., the initial uplink measurement resource); otherwise, the first access network device sends the reconfigured third uplink measurement resource and a negative response message Nack carrying the reconfigured third uplink measurement resource to the second access network device as configuration information of the initial uplink measurement resource, and instructs the second access network device to determine the target uplink measurement resource from the reconfigured third uplink measurement resource (i.e., the initial uplink measurement resource).

It should be noted that, in the above two examples, the second access network device may determine all initial uplink measurement resources as target uplink measurement resources, or may determine a part of the initial uplink measurement resources as the target uplink measurement resources.

It can be understood that, after the target uplink measurement resource is determined by using the implementation manners corresponding to the two examples, the second access network device may send, in addition to step 101, the configuration information of the determined target uplink measurement resource to the first access network device, and the second access network device may also send the configuration information of the determined target uplink measurement resource to the UE, so as to inform the UE of the time-frequency resource of the uplink sounding signal sent by the UE. In this way, the second access network device sends the configuration information of the target uplink measurement resource to the UE and the first access network device, respectively, so that the time-frequency resource used by the UE to send the uplink probe signal to the first access network device is determined between the UE and the first access network device.

The random access in this embodiment may be applied to different communication scenarios, and for different communication scenarios, the configuration information of the target uplink measurement resource may be sent to the first access network device by being carried in different information.

As a possible implementation scenario, if the second access network device requests to switch the UE from the second access network device to the first access network device, at this time, the second access network device needs to send a switching request to the first access network device, so as to request to switch the UE from the second access network device to the first access network device, in this scenario, the configuration information of the target uplink measurement resource in step 201 may be carried in the switching request, and then the first access network device may parse the configuration information of the target uplink measurement resource from the switching request after receiving the switching request.

As another possible implementation scenario, if the second access network device requests the UE that has accessed the second access network device to re-access the first access network device, at this time, the second access network device needs to send an auxiliary station addition request to the first access network device to request to re-access the first access network device when the UE has accessed the second access network device, and in this scenario, the configuration information of the target uplink measurement resource in step 201 may be carried in the auxiliary station addition request, and then, after receiving the auxiliary station addition request, the first access network device may parse the configuration information of the target uplink measurement resource from the auxiliary station addition request.

Step 202, the first access network device receives an uplink sounding signal sent by the user equipment UE through the first uplink carrier by using the target uplink measurement resource.

Step 203, the first access network device measures the uplink probing signal according to the configuration information of the target uplink measurement resource, and obtains a measurement result.

In specific implementation, after the first access network device and the UE both receive the configuration resource of the target uplink measurement resource sent by the second access network device, the UE may send an uplink sounding signal to the first access network device through a first uplink carrier with a lower frequency by using the received target uplink measurement resource, and the first access network device measures the received uplink sounding signal to obtain a reference signal received power RSRP of the uplink sounding signal, and obtains a measurement result according to the RSRP.

It can be understood that the measurement result may be used to determine the path loss of the signal sent by the UE to the first access network device through the first uplink carrier by using the target uplink measurement resource, and then, the measurement result may also be approximately regarded as the uplink path loss of the Preamble sent by the UE to the first access network device through the first uplink carrier by using the random access resource. Therefore, the uplink path loss is determined according to the measurement result, and further, the appropriate uplink transmission power can be calculated according to the uplink path loss, so that the UE can effectively initiate the Preamble to the first access network device, and the problem of inaccurate estimation caused by using the downlink path loss to replace the uplink path loss under the condition that the frequencies of the uplink carrier and the downlink carrier are different is solved.

As an example, the measurement result may be a reference signal received power RSRP of the uplink sounding signal itself, specifically, after the first access network device feeds back the RSRP as the measurement result to the UE, the UE may calculate a path loss of the uplink sounding signal according to a known sending power for sending the uplink sounding signal and the RSRP, for example, a difference value obtained by subtracting the RSRP from the sending power for sending the uplink sounding signal by the UE may be used as the path loss of the uplink sounding signal; and then, the calculated path loss of the uplink detection signal can be compensated to a preset value, so that the proper sending power for sending the Preamble by the UE can be obtained.

As another example, the measurement result may also be a path loss of the uplink sounding signal, specifically, the first access network device needs to receive the transmission power of the uplink sounding signal sent by the UE, and calculate the path loss of the uplink sounding signal according to the received transmission power and the measured RSRP, for example, a difference between the transmission power of the uplink sounding signal sent by the UE and the RSRP may be used as the path loss of the uplink sounding signal; the first access network device feeds back the path loss of the uplink detection signal as a measurement result to the UE, and the UE can then directly compensate the path loss of the uplink detection signal to a preset value, so as to obtain a suitable transmission power for the UE to transmit the Preamble. In one aspect, the sending power of the uplink probing signal sent by the UE may be carried in different information according to different communication scenarios and sent to the first access network device, and specifically, if the second access network device requests to switch the UE from the second access network device to the first access network device, the sending power of the uplink probing signal sent by the UE may be carried in a switching request sent by the second access network device to the first access network device; or, if the second access network device requests the UE that has accessed the second access network device to access the first access network device again, the transmission power of the uplink probe signal sent by the UE may be carried in the secondary station addition request sent by the second access network device to the first access network device. In another case, the UE may send the transmission power of the uplink sounding signal sent by the UE to the first access network device alone without carrying the transmission power of the uplink sounding signal sent by the UE in other information.

Step 204, the first access network device sends the measurement result to the second access network device.

Step 205, the second access network device sends the received measurement result to the UE.

In step 206, the UE determines, according to the measurement result, to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

The random access in this embodiment may be applied to different communication scenarios, and for different communication scenarios, the first access network device may carry the measurement result in different information and send the measurement result to the UE.

As a possible implementation scenario, if the second access network device requests to switch the UE from the second access network device to the first access network device, in this scenario, the measurement result may be carried in a switching instruction sent by the first access network device to the UE through the second access network device, where the switching instruction is used to instruct the UE to switch from the second access network device to the first access network device.

As another possible implementation scenario, if the second access network device requests the UE that has accessed the second access network device to re-access the first access network device, in this scenario, the measurement result may be carried in an auxiliary station adding instruction that is sent by the first access network device to the UE through the second access network device, where the auxiliary station adding instruction is used to instruct the UE to re-access the first access network device when the UE has accessed the second access network device.

It can be understood that, after the first access network device measures the received uplink probe signal to obtain the measurement result, the first access network device may send the measurement result to the UE through the second access network device, and then determine that the UE initiates the Preamble sending power to the first access network device through the first uplink carrier according to the measurement result and the minimum allowed power (i.e., the preset value) when the Preamble reaches the first access network device.

In a specific implementation, in a manner that it is determined that the UE initiates the Preamble sending power to the first access network device through the first uplink carrier according to the measurement result, in one case, when the measurement result is RSRP, the UE may first subtract the RSRP from the sending power at which the UE sends the uplink probing signal to obtain a path loss of the uplink probing signal, and then compensate the path loss of the uplink probing signal to the preset value to obtain the Preamble sending power at which the UE initiates the Preamble to the first access network device through the first uplink carrier. In another case, when the measurement result is the path loss of the uplink sounding signal, the UE may directly compensate the path loss of the uplink sounding signal to the preset value, so as to obtain the sending power of the UE initiating the Preamble to the first access network device through the first uplink carrier.

After the UE determines that the Preamble transmission power is initiated to the first access network device through the first uplink carrier, the UE may transmit the Preamble to the first access network device through the first uplink carrier by using the random access resource with the transmission power. The Random Access resource may be a Random Access Channel (RACH).

It can be seen that, in this embodiment of the present application, if the UE randomly accesses the first access network device, the first access network device may obtain an uplink measurement result for the first uplink carrier by receiving the uplink probe signal sent on the first uplink carrier and measuring the uplink probe signal, and feed back the uplink measurement result to the UE, so that the UE determines a reasonable sending power for initiating the Preamble according to the uplink measurement result, thereby overcoming a problem that the determined sending power is not appropriate because the downlink path loss is directly taken as the uplink path loss and the uplink and downlink path loss difference caused by carriers of different frequencies is ignored, so that the UE can effectively send the Preamble to the first access network device to be randomly accessed by using the sending power, and improving the probability that the UE accesses the first access network device.

After the complete technical solution of the embodiment shown in fig. 1 is introduced, in order to make the embodiment of the present application clearer, a specific exemplary embodiment is introduced below with reference to the drawings, and a specific procedure of how a UE determines to initiate transmission power of a Preamble and how to perform random access is described in several possible scenarios.

As a first possible example scenario, assuming that the UE has an accessed source base station and a target base station to be accessed, and the UE needs to be handed over from the source base station to the target base station, a specific implementation manner of this embodiment may include: determining configuration information of target uplink measurement resources; determining the sending power for initiating a Preamble; and carrying out random access.

As an example, if the target base station specifies the initial uplink measurement resource and the measurement result is RSRP, the implementation process may specifically include the following steps, referring to fig. 3:

step 301, the source base station sends a resource allocation request to the target base station.

Step 302, the target base station configures a first initial uplink measurement resource for the uplink probing signal sent by the UE through the first uplink carrier according to the resource configuration request.

Step 303, the target base station sends configuration information of the first initial uplink measurement resource to the source base station.

Step 304, the source base station determines a target uplink measurement resource from the first initial uplink measurement resource.

Step 305, the source base station sends a handover request carrying configuration information of the target uplink measurement resource to the target base station.

Step 306, the source base station sends the configuration information of the target uplink measurement resource to the UE.

Step 307, the UE sends an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

Step 308, the target base station measures the received uplink probing signal according to the configuration information of the target uplink measurement resource in the handover request, so as to obtain RSRP of the uplink probing signal.

And 309, the target base station sends the switching instruction carrying the RSRP to the UE through the source base station.

In step 310, the UE determines the path loss of the uplink probing signal according to the RSRP and the transmission power of the uplink probing signal, and further determines a suitable transmission power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss and a preset value.

In particular implementation, the transmit power may be determined by the formula: the UE initiates a Preamble sending power to the target base station through the first uplink carrier, namely the sending power-RSRP + preset value of the UE sending the uplink detection signal to the target base station.

Step 311, the UE sends the Preamble to the target base station through the source base station with the determined sending power, so as to complete the effective random access.

As another example, if the target base station specifies the initial uplink measurement resource and the measurement result is the path loss of the uplink sounding signal, the implementation process is as shown in fig. 4, and the method may include the following steps:

step 401, the source base station sends a resource allocation request to the target base station.

Step 402, the target base station configures a first initial uplink measurement resource for the uplink probing signal sent by the UE through the first uplink carrier according to the resource configuration request.

Step 403, the target base station sends configuration information of the first initial uplink measurement resource to the source base station.

Step 404, the source base station determines a target uplink measurement resource from the first initial uplink measurement resource.

Step 405, the source base station sends configuration information carrying the target uplink measurement resource to the target base station, and the UE sends a switching request of the sending power of the uplink probing signal to the target base station.

It should be noted that the transmission power of the uplink sounding signal transmitted by the UE to the target base station may also be transmitted by the UE to the target base station alone, and is not carried in the handover request.

Step 406, the source base station sends configuration information of the target uplink measurement resource to the UE.

Step 407, the UE sends an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

Step 408, the target base station measures the received uplink probing signal according to the configuration information of the target uplink measurement resource in the handover request, so as to obtain RSRP of the uplink probing signal.

Step 409, the target base station determines the path loss of the uplink probing signal according to the RSRP and the received transmission power of the uplink probing signal sent by the UE to the target base station.

Step 410, the target base station sends the switching instruction carrying the path loss of the uplink probing signal to the UE through the source base station.

In step 411, the UE determines a suitable sending power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss of the uplink probing signal and the preset value.

In particular implementation, the transmit power may be determined by the formula: and the UE initiates a Preamble sending power to the target base station through the first uplink carrier, wherein the Preamble sending power is the path loss of the uplink detection signal plus a preset value.

Step 412, the UE sends the Preamble to the target base station through the source base station with the determined sending power, so as to complete the effective random access.

As an example, if the source base station specifies the initial uplink measurement resource and the measurement result is RSRP, the implementation process may specifically include the following steps, referring to fig. 5 and fig. 6:

step 501, the source base station sends a configured resource confirmation request to the target base station, where the configured resource confirmation request is used to request to confirm whether to allocate a second initial uplink measurement resource for the uplink sounding signal.

In one case, when the target base station agrees to the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, as shown in fig. 5, steps 502 to 503, and then steps 504 to 510, may be performed.

Step 502, the target base station sends an acknowledgement response message Ack to the source base station to acknowledge the configured resource acknowledgement request.

Step 503, the source base station determines a target uplink measurement resource from the second initial uplink measurement resource.

Or,

in another case, when the target base station does not agree with the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, as shown in fig. 6, steps 602 to 603 and subsequent steps 504 to 510 may be performed after 501.

Step 602, the target base station allocates a third initial uplink measurement resource for the uplink sounding signal and sends a negative response message Nack to the configured resource confirmation request to the source base station; wherein, the negative response message Nack carries the fourth initial uplink measurement resource.

Step 603, the source base station determines a target uplink measurement resource from the third initial uplink measurement resource.

Step 504, the source base station sends a handover request carrying configuration information of the target uplink measurement resource to the target base station.

Step 505, the source base station sends the configuration information of the target uplink measurement resource to the UE.

Step 506, the UE sends an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

Step 507, the target base station measures the received uplink probing signal according to the configuration information of the target uplink measurement resource in the handover request, so as to obtain RSRP of the uplink probing signal.

And step 508, the target base station sends the switching instruction carrying the RSRP to the UE through the source base station.

In step 509, the UE determines the path loss of the uplink probing signal according to the RSRP and the transmission power of the uplink probing signal, and further determines a suitable transmission power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss and a preset value.

Step 510, the UE sends the Preamble to the target base station through the source base station with the determined sending power, so as to complete the effective random access.

As another example, if the source base station specifies an initial uplink measurement resource and the measurement result is a path loss of an uplink sounding signal, the implementation process may specifically include the following steps, referring to fig. 7 and fig. 8:

step 701, the source base station sends a configured resource confirmation request to the target base station, where the configured resource confirmation request is used to request to confirm whether to allocate a second initial uplink measurement resource for the uplink sounding signal.

In one case, when the target base station agrees to the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, as shown in fig. 7, steps 702 to 703 and subsequent steps 704 to 711 may be performed.

In step 702, the target base station sends an acknowledgement response message Ack to the source base station to acknowledge the configured resource acknowledgement request.

Step 703, the source base station determines a target uplink measurement resource from the second initial uplink measurement resource.

Or,

alternatively, when the target base station does not agree with the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, as shown in fig. 8, steps 802 to 803, and then steps 704 to 711, may be performed after 701.

Step 802, the target base station allocates a third initial uplink measurement resource for the uplink sounding signal and sends a negative response message Nack to the configured resource confirmation request to the source base station; wherein, the negative response message Nack carries the fourth initial uplink measurement resource.

Step 803, the source base station determines a target uplink measurement resource from the third initial uplink measurement resource.

Step 704, the source base station sends the configuration information carrying the target uplink measurement resource to the target base station, and the UE sends a switching request of the sending power of the uplink probing signal to the target base station.

Step 705, the source base station sends configuration information of the target uplink measurement resource to the UE.

Step 706, the UE sends an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

And 707, the target base station measures the received uplink probing signal according to the configuration information of the target uplink measurement resource in the handover request, so as to obtain RSRP of the uplink probing signal.

Step 708, the target base station determines the path loss of the uplink sounding signal according to the RSRP and the received transmission power of the uplink sounding signal sent by the UE to the target base station.

Step 709, the target base station sends the switching instruction carrying the path loss of the uplink probing signal to the UE through the source base station.

Step 710, the UE determines a suitable sending power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss of the uplink probing signal and the preset value.

Step 711, the UE sends the Preamble to the target base station through the source base station with the determined sending power, so as to complete the effective random access.

As a second possible exemplary scenario, assuming that the UE has an accessed source base station and a target base station to be accessed, considering a Dual-connectivity (DC) scenario, such as EN-DC or NR-DC, that is, EUTRA-NR DC and NR-NR DC scenarios, if the target base station supports the configuration in the SUL technology, the method provided in this embodiment may also be used for power control in a secondary station addition scenario, that is, the UE needs to add the target base station as a secondary station on the basis of the source base station having been accessed.

In an example, as shown in fig. 9, the target base station configures an initial uplink measurement resource, and when a measurement result is RSRP, the power control of the random access specifically includes:

in step 901, a source base station sends a resource allocation request to a target base station.

Step 902, the target base station configures a first initial uplink measurement resource for the uplink probing signal sent by the UE through the first uplink carrier according to the resource configuration request.

Step 903, the target base station sends configuration information of the first initial uplink measurement resource to the source base station.

Step 904, the source base station determines a target uplink measurement resource from the first initial uplink measurement resource.

Step 905, the source base station sends an auxiliary station adding request carrying configuration information of the target uplink measurement resource to the target base station.

Step 906, the source base station sends the configuration information of the target uplink measurement resource to the UE.

Step 907, the UE sends an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

Step 908, the target base station measures the received uplink probing signal according to the configuration information of the target uplink measurement resource in the secondary station adding request, so as to obtain RSRP of the uplink probing signal.

In step 909, the target base station sends the secondary station adding instruction carrying the RSRP to the UE through the source base station.

In step 910, the UE determines the path loss of the uplink probing signal according to the RSRP and the transmission power of the uplink probing signal, and further determines a suitable transmission power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss and a preset value.

And step 911, the UE sends the Preamble to the target base station through the source base station with the determined sending power, and the effective random access is completed.

In another example, as shown in fig. 10, when the target base station configures an initial uplink measurement resource, and a measurement result is a path loss of an uplink sounding signal, the power control of the random access specifically includes:

step 1001, a source base station sends a resource allocation request to a target base station.

Step 1002, the target base station configures a first initial uplink measurement resource for an uplink probing signal sent by the UE through the first uplink carrier according to the resource configuration request.

Step 1003, the target base station sends configuration information of the first initial uplink measurement resource to the source base station.

Step 1004, the source base station determines a target uplink measurement resource from the first initial uplink measurement resource.

Step 1005, the source base station sends the configuration information carrying the target uplink measurement resource to the target base station, and the UE sends the auxiliary station addition request of the sending power of the uplink sounding signal to the target base station.

Step 1006, the source base station sends configuration information of the target uplink measurement resource to the UE.

Step 1007, the UE sends an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

And step 1008, the target base station measures the received uplink sounding signal according to the configuration information of the target uplink measurement resource in the secondary station adding request, so as to obtain RSRP of the uplink sounding signal.

Step 1009, the target base station determines the path loss of the uplink sounding signal according to the RSRP and the received transmission power of the uplink sounding signal sent by the UE to the target base station.

Step 1010, the target base station sends the auxiliary station adding instruction carrying the path loss of the uplink sounding signal to the UE through the source base station.

In step 1011, the UE determines a suitable sending power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss and the preset value of the uplink sounding signal.

Step 1012, the UE sends the Preamble to the target base station through the source base station with the determined sending power, so as to complete the effective random access.

In another example, as shown in fig. 11 to 12, the source base station configures an initial uplink measurement resource, and when the measurement result is RSRP, the power control of the random access specifically includes:

step 1101, the source base station sends a configured resource confirmation request to the target base station, where the configured resource confirmation request is used to request to confirm whether to allocate a second initial uplink measurement resource for the uplink sounding signal.

In one case, when the target base station agrees to the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, steps 1102 to 1103 and the following steps 1104 to 1110 may be performed.

In step 1102, the target base station sends an acknowledgement response message Ack to the source base station to acknowledge the configured resource acknowledgement request.

Step 1103, the source base station determines a target uplink measurement resource from the second initial uplink measurement resource.

Or,

in another case, when the target base station does not agree with the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, steps 1202 to 1203, and subsequent steps 1104 to 1110 may be performed after 1101.

Step 1202, the target base station allocates a third initial uplink measurement resource for the uplink sounding signal and sends a negative response message Nack to the configured resource confirmation request to the source base station; wherein, the negative response message Nack carries the fourth initial uplink measurement resource.

Step 1203, the source base station determines a target uplink measurement resource from the third initial uplink measurement resource.

And 1104, the source base station sends an auxiliary station adding request carrying configuration information of the target uplink measurement resource to the target base station.

In step 1105, the source base station sends configuration information of the target uplink measurement resource to the UE.

In step 1106, the UE transmits an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

Step 1107, the target base station measures the received uplink probing signal according to the configuration information of the target uplink measurement resource in the secondary station addition request, so as to obtain the RSRP of the uplink probing signal.

And step 1108, the target base station sends the secondary station adding instruction carrying the RSRP to the UE through the source base station.

Step 1109, the UE determines the path loss of the uplink probing signal according to the RSRP and the transmission power of the uplink probing signal, and further determines a suitable transmission power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss and a preset value.

Step 1110, the UE sends the Preamble to the target base station through the source base station with the determined sending power, so as to complete the effective random access.

In another example, as shown in fig. 13 to 14, the source base station configures an initial uplink measurement resource, and when the measurement result is a path loss of an uplink sounding signal, the power control of the random access specifically includes:

step 1301, the source base station sends a configured resource confirmation request to the target base station, where the configured resource confirmation request is used to request to confirm whether to allocate a second initial uplink measurement resource for the uplink sounding signal.

In one case, when the target base station agrees to the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, steps 1302 to 1303 and the following steps 1304 to 1311 may be performed.

In step 1302, the target base station sends an acknowledgement response message Ack to the source base station to acknowledge the configured resource acknowledgement request.

And step 1303, the source base station determines a target uplink measurement resource from the second initial uplink measurement resource.

Or,

in another case, when the target base station does not agree with the initial uplink sounding resource allocated by the source base station for the uplink sounding signal, steps 1402 to 1403, and subsequent steps 1304 to 1311 may be performed after 1301.

Step 1402, the target base station allocates a third initial uplink measurement resource for the uplink sounding signal and sends a negative response message Nack to the configured resource confirmation request to the source base station; wherein, the negative response message Nack carries the fourth initial uplink measurement resource.

Step 1403, the source base station determines a target uplink measurement resource from the third initial uplink measurement resource.

In step 1304, the source base station sends configuration information carrying the target uplink measurement resource to the target base station, and the UE sends an auxiliary station addition request of the transmission power of the uplink sounding signal to the target base station.

Step 1305, the source base station sends configuration information of the target uplink measurement resource to the UE;

in step 1306, the UE transmits an uplink sounding signal to the target base station through the first uplink carrier by using the target uplink measurement resource.

Step 1307, the target base station measures the received uplink probing signal according to the configuration information of the target uplink measurement resource in the secondary station adding request, so as to obtain the RSRP of the uplink probing signal.

Step 1308, the target base station determines the path loss of the uplink sounding signal according to the RSRP and the received sending power of the uplink sounding signal sent by the UE to the target base station.

Step 1309, the target base station sends the secondary station adding instruction carrying the path loss of the uplink sounding signal to the UE through the source base station.

Step 1310, the UE determines a suitable sending power for initiating a Preamble to the target base station through the first uplink carrier according to the path loss of the uplink probing signal and the preset value.

And a third part: step 1311, the UE sends the Preamble to the target base station through the source base station with the determined sending power, so as to complete effective random access.

It can be understood that, in the above embodiments, the "first", "second", and "third" of the first initial uplink measurement resource, the second initial uplink measurement resource, and the third initial uplink measurement resource are only to distinguish different embodiments, and all of the initial uplink measurement resources allocated by the target base station for the uplink measurement resource request specifically include the initial uplink measurement resource configured by the target base station for the uplink measurement resource request and the initial uplink measurement resource configured by the source base station for the uplink measurement resource request.

It should be noted that, for specific descriptions and achieved effects of fig. 3 to fig. 14, reference may be made to the description in the embodiment shown in fig. 2, and details are not described here again.

Through the introduction of the above exemplary embodiment, it is described that by using the random access power control method corresponding to the first possible implementation manner, accurate calculation of the sending power of the Preamble initiated by the UE can be achieved, and then the UE can be effectively accessed to the target access network device.

After the power control method of random access corresponding to the first possible implementation is introduced, the power control method of random access corresponding to the second possible implementation is specifically introduced below.

For example, corresponding to the second possible implementation manner, one of the scenarios in the embodiment of the present application may be applied to the scenario shown in fig. 15. In this scenario, power control of the first access network device 1510 for random access to the UE 1520 needs to be implemented. Wherein, data interaction between the first access network device 1510 and the UE 1520 can be performed through a wireless network. A cell of the first access network device 1510 includes a downlink carrier and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, and a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier.

The specific random access control scheme may include: first, the first access network device 1510 transmits a downlink signal to the UE 1520 through a downlink carrier, and transmits a transmission power of the downlink signal to the UE 1520; then, the UE 1520 measures a downlink signal sent by the first access network device 1510 through a downlink carrier, to obtain a target reference signal received power RSRP of the downlink signal, and receives a sending power of the downlink signal; then, the UE 1520 searches for a target compensation value corresponding to the target RSRP in a preset target correspondence; finally, the UE 1520 may determine, according to the target RSRP, the transmission power of the downlink signal, and the target compensation value, the transmission power for initiating the random access to the first access network device 1510 through the first uplink carrier.

Fig. 16 is a flowchart illustrating a power control method for random access in an embodiment of the present application. Referring to fig. 16, the power control method for random access corresponds to the description in the second possible implementation manner, and specifically includes the following steps 1601 to 1604:

step 1601, a first access network device sends a downlink signal to a UE through a downlink carrier, and sends a sending power of the downlink signal to the UE.

Step 1602, the UE measures a downlink signal sent by the first access network device through a downlink carrier to obtain a target RSRP of the downlink signal, and receives a sending power of the downlink signal.

In step 1603, the UE searches for a target offset value corresponding to the target RSRP in a target preset corresponding relationship.

Step 1604, the UE determines to initiate Preamble sending power to the first access network device through the first uplink carrier according to the target RSRP, the sending power of the downlink signal, and the target compensation value.

The cell of the first access network device includes a downlink carrier and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, and the frequency of the first uplink carrier is smaller than that of the second uplink carrier. For example, in a 5G-NR scenario, a downlink carrier NR DL carrier, a second uplink carrier NR UL carrier, and a first uplink carrier SUL carrier are provided in one cell, where the first uplink carrier SUL carrier is a low-frequency carrier having a frequency lower than the frequencies of the downlink carrier NR DL carrier and the second uplink carrier NR UL carrier. If the UE sends the Preamble to the first access network device through the first uplink carrier SUL carrier, at this time, due to the difference between uplink and downlink carrier frequencies, the uplink path loss of the UE needs to be measured because the downlink path loss cannot be used to replace the uplink path loss to compensate the preset value.

It can be understood that, since the preset corresponding relationship between the RSRP of the downlink signal and the compensation value is preset, the target RSRP can be obtained by measuring the downlink signal, and then the target compensation value corresponding to the target RSRP is determined according to the preset corresponding relationship, and the sending power of the suitable UE for sending the Preamble through the first uplink carrier is calculated.

The preset corresponding relationship may include multiple forms, and in one possible case, as shown in table 1 below, the preset corresponding relationship is unique and fixed, that is, each target RSRP may only correspond to one target compensation value, and a situation that one target RSRP corresponds to multiple target compensation values may not occur. In this way, step 1603 may determine a unique preset corresponding relationship as the target preset corresponding relationship directly according to the measured target RSRP of the downlink signal, so that the compensation value in the target preset corresponding relationship may be used as the target compensation value without considering the influence of the factors such as the channel condition, frequency, and mobile scene of downlink signal transmission on the target compensation value, thereby simplifying the operation of determining the target compensation value.

TABLE 1A Preset correspondence

For example, assuming that the target RSRP measured in step 1502 is n +3dB, a target offset b corresponding to the target RSRP being n +3dB can be determined according to table 1.

In another possible case, as shown in table 2 below, a plurality of preset correspondences are preset for different channel conditions, frequencies, mobile scenes, and other factors of downlink signal transmission, for example, table 2 includes two preset correspondences: 1 and 2, each preset correspondence corresponding to a preset correspondence shown in table 1 above. The two preset corresponding relations are indexed according to the corresponding relation identification, the same RSRP can correspond to different target compensation values in different index relation tables, and a plurality of RSRPs can correspond to the same compensation value in the same index relation table and can also correspond to different compensation values. Thus, step 1603 may include: firstly, the UE searches a preset corresponding relation corresponding to the corresponding relation identification in a plurality of preset corresponding relations according to the received corresponding relation identification, and the preset corresponding relation is used as a target preset corresponding relation; then, the UE searches a target compensation value corresponding to the target RSRP in the preset target corresponding relation.

TABLE 2 Another Preset correspondence

For example, assuming that the target RSRP measured in step 1502 is n +3dB and the corresponding relationship identifier received by the UE is "2", the UE may first determine the preset corresponding relationship with the corresponding relationship identifier of "2" as the target preset corresponding relationship among two preset corresponding relationships preset in table 2, and then search for the target compensation value d corresponding to the target RSRP being n +3dB in the target preset corresponding relationship.

In specific implementation, the preset corresponding relationship may be set in different devices. In some possible implementation manners, the preset corresponding relationship may be preset in the first access network device, and then, in step 1603, the UE determines the target compensation value according to the target RSRP, which may specifically be: firstly, a first access network device sends a preset corresponding relation in the first access network device to UE; then, after receiving the preset corresponding relationship sent by the first access network device, the UE searches for a compensation value corresponding to the target RSRP in the preset corresponding relationship, and uses the compensation value as a target compensation value.

It can be understood that the random access in this embodiment may be applied to different communication scenarios, and for different communication scenarios, the first access network device may carry the preset correspondence in different information and send the information to the UE.

As a possible scenario, when the scenario includes a first access network device and a UE, and the first access network device sends a Radio Resource Control (RRC) signaling to the UE, the preset corresponding relationship may be carried in the RRC signaling. As another possible scenario, when the scenario includes a first access network device, a second access network device, and a UE, and the second access network device requests to switch the UE from the second access network device to the first access network device, the first access network device may carry the preset correspondence in a handover instruction sent by the first access network device to the UE through the second access network device, where the handover instruction is used to instruct the UE to switch from the second access network device to the first access network device, and also provide a basis for determining a target compensation value according to a target RSRP for the UE. As another possible scenario, when the scenario includes a first access network device, a second access network device, and a UE, and the second access network device requests the UE that has accessed the second access network device to access the first access network device again, the first access network device may carry the corresponding relationship identifier in an auxiliary station adding instruction that is sent by the first access network device to the UE through the second access network device, where the auxiliary station adding instruction is used to not only instruct the UE to access the first access network device again when the UE has accessed the second access network device, but also provide a basis for determining a target compensation value according to a target RSRP for the UE.

In other possible implementations, the preset correspondence may also be preset in the UE. In one case, if the preset correspondence preset in the UE is the preset correspondence shown in table 1, then the UE determines the target compensation value according to the target RSRP in step 1603, which may specifically be: the UE directly searches for a compensation value corresponding to the target RSRP in the preset correspondence as shown in table 1, and uses the compensation value as the target compensation value. In another case, if a plurality of preset correspondence relationships shown in table 2 are preset in the UE, then, in step 1603, the UE determines a target compensation value according to the target RSRP, which may specifically be: firstly, a first access network device sends a corresponding relation identifier to UE; then, after receiving the corresponding relationship identifier sent by the first access network device, the UE searches a preset corresponding relationship corresponding to the corresponding relationship identifier in a plurality of preset relationships, and takes the preset corresponding relationship as a target preset corresponding relationship; and then, searching a compensation value corresponding to the target RSRP in the determined target preset relation to serve as a target compensation value.

It can be understood that the random access in this embodiment may be applied to different communication scenarios, and for different communication scenarios, the first access network device may carry the correspondence identifier in different information and send the information to the UE.

As a possible scenario, when the scenario includes the first access network device and the UE, and the first access network device sends an RRC signaling to the UE, the corresponding relationship identifier may be carried in the RRC signaling. As another possible scenario, when the scenario includes a first access network device, a second access network device, and a UE, and the second access network device requests to switch the UE from the second access network device to the first access network device, the first access network device may carry the corresponding relationship identifier in a handover instruction sent by the first access network device to the UE through the second access network device, where the handover instruction is used to instruct the UE to switch from the second access network device to the first access network device, and also provide a basis for determining a target compensation value according to a target RSRP for the UE. As another possible scenario, when the scenario includes a first access network device, a second access network device, and a UE, and the second access network device requests the UE that has accessed the second access network device to access the first access network device again, the first access network device may carry the corresponding relationship identifier in an auxiliary station adding instruction that is sent by the first access network device to the UE through the second access network device, where the auxiliary station adding instruction is used to not only instruct the UE to access the first access network device again when the UE has accessed the second access network device, but also provide a basis for determining a target compensation value according to a target RSRP for the UE.

After determining the target compensation value corresponding to the target RSRP according to step 1603, the UE may determine to initiate sending power of Preamble to the first access network device through the first uplink carrier according to the target RSRP, the sending power of the downlink signal, and the target compensation value, where the sending power of the downlink signal is a known index of the UE.

In a specific implementation, in the first step, the path loss of the UE sending the uplink sounding signal may be estimated approximately according to the target RSRP, the sending power of the downlink signal, and the target compensation value, for example, the path loss of the UE sending the uplink sounding signal may be determined by the following formula: and the path loss of the UE for sending the uplink detection signal is the sending power of the downlink signal, namely the target RSRP and the target compensation value. And secondly, determining appropriate sending power for sending the Preamble through the first uplink carrier according to the path loss and the preset value of the uplink detection signal sent by the UE, for example, calculating the sum of the path loss and the preset value of the uplink detection signal sent by the UE as the sending power for sending the Preamble through the first uplink carrier.

It can be understood that, after the UE determines that the Preamble transmission power is initiated to the first access network device through the first uplink carrier, the UE may send the Preamble to the first access network device through the first uplink carrier by using the transmission power, because the transmission power is a target compensation value corresponding to target RSRP compensation measured for different downlink signals, instead of using a fixed offset compensation method in the prior art, a suitable transmission power for sending the Preamble is determined according to the transmission power of the downlink signals, the measurement result of the downlink signals, and the corresponding compensation value, and the UE sends the Preamble to the first access network device by using the transmission power at the time, the first access network device may effectively receive the Preamble, and further successfully complete the random access.

It can be seen that, in the embodiment of the present application, different compensation values are correspondingly set in advance for different measurement results of a downlink signal, and if the UE performs random access to the first access network device, the UE performs targeted compensation on the measurement results of the downlink signal under different conditions after receiving the measurement result of the downlink signal sent by the first access network device, so that the path loss of the uplink probe signal can be estimated by approximately using the measurement result of the downlink signal and the corresponding compensation value, and then, according to the transmission power of the downlink signal, the measurement result of the downlink signal and the corresponding compensation value, the appropriate transmission power for sending the Preamble is determined, thereby improving the probability of accessing the UE to the first access network device.

In addition, an embodiment of the present application further provides a power control apparatus for random access, as shown in fig. 17, which is a schematic structural diagram of the apparatus, where the power control apparatus is a first access network device, and includes:

a first receiving unit 1701, configured to receive configuration information of a target uplink measurement resource sent by a second access network device; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

a second receiving unit 1702, configured to receive an uplink sounding signal sent by a user equipment UE through the first uplink carrier by using the target uplink measurement resource;

a measuring unit 1703, configured to measure the uplink probing signal according to the configuration information of the target uplink measurement resource, to obtain a measurement result;

a first sending unit 1704, configured to send the measurement result to the UE through the second access network device; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

In some possible implementations, the apparatus further includes:

Correspondingly, an embodiment of the present application further provides a power control device for random access, as shown in fig. 18, which is a schematic structural diagram of the device, where the power control device is a second access network device, and includes:

a first sending unit 1801, configured to send configuration information of a target uplink measurement resource to a first access network device and a user equipment UE; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

a first receiving unit 1802, configured to receive a measurement result obtained by the first access network device measuring the uplink sounding signal according to the configuration information of the target uplink measurement resource; wherein the uplink sounding signal is sent by the UE to the first access network device through the first uplink carrier by using the target uplink measurement resource;

a second sending unit 1803, configured to send the measurement result to the UE; wherein the measurement result is used for instructing the UE to determine to initiate the transmission power of the random access preamble to the first access network device through the first uplink carrier.

In some possible implementations, the apparatus further includes:

Correspondingly, an embodiment of the present application further provides a power control apparatus for random access, as shown in fig. 19, which is a schematic structural diagram of the apparatus, where the power control apparatus is a user equipment UE, and includes:

a first receiving unit 1901, configured to receive configuration information of a target uplink measurement resource sent by a second access network device;

a sending unit 1902, configured to send, according to the configuration information, an uplink sounding signal to a first access network device through a first uplink carrier by using the target uplink measurement resource; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

a second receiving unit 1903, configured to receive a measurement result sent by the second access network device, where the measurement result is obtained by the first access network device measuring the uplink sounding signal according to the configuration information;

The foregoing is an introduction to the power control apparatus for random access provided in this embodiment, and specific implementation manners may refer to descriptions in the power control method embodiment for random access shown in fig. 2 above, and effects achieved by the power control apparatus for random access are consistent with the above method embodiment, and are not described again here.

In addition, an embodiment of the present application further provides a power control apparatus for random access, as shown in fig. 20, which is a schematic structural diagram of the apparatus, where the power control apparatus is a user equipment UE, and includes:

a measuring unit 2001, configured to measure a downlink signal sent by a first access network device through a downlink carrier, to obtain a target reference signal received power RSRP of the downlink signal;

a receiving unit 2002, configured to receive the transmit power of the downlink signal;

a searching unit 2003, configured to search a target compensation value corresponding to the target RSRP in a preset target correspondence;

a determining unit 2004, configured to determine, according to the target RSRP, the transmit power of the downlink signal, and the target compensation value, a transmit power for initiating a random access to the first access network device through a first uplink carrier;

Correspondingly, an embodiment of the present application further provides a power control apparatus for random access, as shown in fig. 21, which is a schematic structural diagram of the apparatus, where the power control apparatus is a first access network device, and includes:

a first sending unit 2101, configured to send a downlink signal to a user equipment UE via a downlink carrier, and send a sending power of the downlink signal to the UE;

a second sending unit 2102, configured to send a correspondence identifier to the UE;

The foregoing is an introduction to the power control apparatus for random access provided in this embodiment, and specific implementation manners may refer to descriptions in the power control method embodiment for random access shown in fig. 16 above, and effects achieved by the power control apparatus for random access are consistent with the above method embodiment, and are not described again here.

In addition, referring to fig. 22, a schematic structural diagram of a power control apparatus for random access in the embodiment of the present application is shown, where the power control apparatus 2200 for random access includes a processor 2202 and a transceiver 2201; the processor 2202 and the transceiver 2201 communicate with each other through the bus; the transceiver 2201 is configured to receive and transmit instructions, and the processor 2202 is configured to call the program instructions received and transmitted by the transceiver 2201 to perform operations corresponding to the random access power control method provided in the embodiment of the present application.

An embodiment of the present application provides a random access power control apparatus, where the power control apparatus is a first access network device, and the processor is configured to read a software instruction in a memory, and execute the software instruction to implement the following operations:

Correspondingly, an embodiment of the present application further provides a random access power control apparatus, where the power control apparatus is a second access network device, and the processor is configured to read a software instruction in the memory, and execute the software instruction to implement the following operations:

Correspondingly, an embodiment of the present application further provides a random access power control apparatus, where the power control apparatus is a user equipment UE, and the processor is configured to read a software instruction in the memory, and execute the software instruction to implement the following operations:

In addition, another random access power control device is provided in the embodiments of the present application, and the structure of the power control device may still refer to fig. 22, which includes a processor and a transceiver.

An embodiment of the present application further provides a random access power control apparatus, where the power control apparatus is a user equipment UE, and the processor is configured to read a software instruction in the memory, and execute the software instruction to implement the following operations:

Correspondingly, the embodiment of the application also provides a random access power control device, wherein the power control device is first access network equipment and comprises a processor and a transceiver;

driving the transceiver to send a corresponding relation identifier to the UE;

In addition, an embodiment of the present application further provides a computer-readable storage medium, where the medium stores a program, and the program includes some or all of the steps in any one of the power control methods for random access shown in fig. 2 or fig. 16 when executed.

In addition, the embodiment of the present application also provides a computer program product, which includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that a computer can store or a data storage device, such as a server, a data center, etc., that is integrated with one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

In addition, an embodiment of the present application further provides a data forwarding system, as shown in fig. 23, the system includes the aforementioned first access network device 2301, second access network device 2302, and user equipment UE 2303.

In the names of "first access network device", "first uplink carrier", and the like, the "first" mentioned in the embodiments of the present application is only used for name identification, and does not represent the first in sequence. The same applies to "second" etc.

As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the above embodiment methods can be implemented by software plus a general hardware platform. Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a read-only memory (ROM)/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network communication device such as a router) to execute the method according to the embodiments or some parts of the embodiments of the present application.

The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the method embodiments and apparatus embodiments are substantially similar to the system embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the system embodiments for related points. The above-described embodiments of the apparatus and system are merely illustrative, wherein modules described as separate parts may or may not be physically separate, and parts shown as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

The above description is only an exemplary embodiment of the present application, and is not intended to limit the scope of the present application.

Claims

1. A method for power control of random access, comprising:

the first access network equipment receives configuration information of target uplink measurement resources sent by the second access network equipment; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

the first access network equipment receives an uplink detection signal sent by User Equipment (UE) through the first uplink carrier by using the target uplink measurement resource; the target uplink measurement resource is sent to the UE through the second access network equipment;

the first access network equipment measures the uplink detection signal according to the configuration information of the target uplink measurement resource to obtain a measurement result;

the first access network equipment sends the measurement result to the UE through the second access network equipment; wherein the measurement result is used for instructing the UE to determine that the transmission power of a random access preamble is initiated to the first access network equipment through the first uplink carrier; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.

2. The method of claim 1, further comprising:

the first access network equipment receives an uplink measurement resource request sent by the second access network equipment;

the first access network equipment allocates initial uplink measurement resources for the uplink measurement resource request and sends indication information of the initial uplink measurement resources to the second access network equipment;

wherein the target uplink measurement resource is determined from the initial uplink measurement resource.

3. The method of claim 1,

the configuration information of the target uplink measurement resource is carried in a handover request sent by the second access network device to the first access network device, where the handover request is used to request that the UE is handed over from the second access network device to the first access network device, the measurement result is carried in a handover instruction sent by the first access network device to the UE via the second access network device, and the handover instruction is used to instruct the UE to be handed over from the second access network device to the first access network device;

or,

the configuration information of the target uplink measurement resource is carried in an auxiliary station adding request sent by the second access network device to the first access network device, the auxiliary station adding request is used for requesting to access the first access network device again under the condition that the UE has accessed the second access network device, the measurement result is carried in an auxiliary station adding instruction sent by the first access network device to the UE through the second access network device, and the auxiliary station adding instruction is used for instructing the UE to access the first access network device again under the condition that the UE has accessed the second access network device.

4. A method for power control of random access, comprising:

the second access network equipment sends the configuration information of the target uplink measurement resource to the first access network equipment and the user equipment UE; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

the second access network equipment receives a measurement result obtained by the first access network equipment measuring the uplink detection signal according to the configuration information of the target uplink measurement resource; wherein the uplink sounding signal is sent by the UE to the first access network device through the first uplink carrier by using the target uplink measurement resource;

the second access network equipment sends the measurement result to the UE; wherein the measurement result is used for instructing the UE to determine that the transmission power of a random access preamble is initiated to the first access network equipment through the first uplink carrier; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.

5. The method of claim 4, further comprising:

the second access network equipment sends an uplink measurement resource request to the first access network equipment;

the second access network equipment receives indication information of initial uplink measurement resources allocated to the uplink measurement resource request by the first access network equipment;

and the second access network equipment determines the target uplink measurement resource from the initial uplink measurement resource.

6. The method of claim 4,

or,

7. A method for power control of random access, comprising:

user Equipment (UE) receives configuration information of a target uplink measurement resource sent by second access network equipment;

the UE sends an uplink detection signal to first access network equipment through a first uplink carrier by using the target uplink measurement resource according to the configuration information; a cell of the first access network device includes a downlink carrier, and a first uplink carrier and a second uplink carrier corresponding to the downlink carrier, where a frequency of the first uplink carrier is smaller than a frequency of the second uplink carrier;

the UE receives a measurement result sent by the second access network device, wherein the measurement result is obtained by the first access network device measuring the uplink detection signal according to the configuration information;

the UE determines to initiate the sending power of a random access lead code to the first access network equipment through the first uplink carrier according to the measuring result; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.

8. The method of claim 7,

or,

9. A power control apparatus for random access, wherein the power control apparatus is a first access network device, and comprises:

a first sending unit, configured to send the measurement result to the UE through the second access network device; wherein the measurement result is used for instructing the UE to determine that the transmission power of a random access preamble is initiated to the first access network equipment through the first uplink carrier; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.

10. A power control device for random access, wherein the power control device is a second access network device, and comprises:

a second sending unit, configured to send the measurement result to the UE; wherein the measurement result is used for instructing the UE to determine that the transmission power of a random access preamble is initiated to the first access network equipment through the first uplink carrier; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.

11. A power control device for random access, wherein the power control device is a User Equipment (UE), comprising:

12. A power control device for random access is characterized in that the power control device is a first access network device and comprises a processor and a transceiver;

driving the transceiver to send the measurement result to the UE through the second access network device; wherein the measurement result is used for instructing the UE to determine that the transmission power of a random access preamble is initiated to the first access network equipment through the first uplink carrier; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.

13. A power control device for random access is characterized in that the power control device is a second access network device and comprises a processor and a transceiver;

driving the transceiver to transmit the measurement result to the UE; wherein the measurement result is used for instructing the UE to determine that the transmission power of a random access preamble is initiated to the first access network equipment through the first uplink carrier; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.

14. A power control device for random access is characterized in that the power control device is User Equipment (UE) and comprises a processor and a transceiver;

determining, according to the measurement result, a transmission power of a random access preamble initiated to the first access network device by the first uplink carrier; the measurement result is used to identify the uplink path loss, and the transmission power is determined by compensating the uplink path loss to a preset value.