WO2014166054A1

WO2014166054A1 - Power control method and device

Info

Publication number: WO2014166054A1
Application number: PCT/CN2013/073945
Authority: WO
Inventors: 徐小英; 马雪利; 陈东
Original assignee: 华为技术有限公司
Priority date: 2013-04-09
Filing date: 2013-04-09
Publication date: 2014-10-16
Also published as: CN104255072B; CN104255072A

Abstract

The present invention provides a method and device for power control. The method comprises: when a user equipment is randomly accessing a network, selecting the i^th uplink sub-carrier from at least two uplink sub-carriers; i is a positive integer, and the network is randomly accessed on the i^th uplink sub-carrier; calculating, according to the uplink interference value of the obtained i^th uplink sub-carrier, the initial uplink power value of the preamble; the initial uplink power value is the initial transmission power of the preamble. The user equipment comprises: a selection module and a calculation module. The solution provided by the embodiment of the present invention performs open loop power control according to uplink interference levels of different sub-carriers, and ensures the effectiveness and accuracy of open loop power control.

Description

TECHNICAL FIELD The present invention relates to communications technologies, and in particular, to a power control method and device. Background technique

The normal UMTS (Universal Mobile Telecommunications System, UMTS for short) bandwidth is 5MHz. The narrow bandwidth UMTS bandwidth is less than 5MHz. Narrow-bandwidth UMTS frequencies can meet different bandwidth requirements, resulting in more efficient spectrum efficiency. For example, in a communication system, the downlink bandwidth is greater than or equal to 5 MHz, and the uplink bandwidth is less than 5 MHz. At this time, the network side transmits and receives data in different uplink and downlink bandwidths, and the user equipment (User Equipment, referred to as UE) is also different. The transmission and reception of data on the bandwidth. Then, for the uplink bandwidth, the uplink interference may be divided into at least two narrow bandwidths, and the uplink interference between the UEs will be reduced, so that the UE obtains high-speed uplink throughput when the narrowband system performs uplink transmission. The downstream throughput will not be affected.

However, on at least two subchannels of the uplink bandwidth, the received total bandwidth power (Received Total Wideband Power, RTPC) received by the base station on different subcarriers is different, and the uplink RTWP on different subcarriers determines the uplink of different subcarriers. Interference level. The UE cannot obtain the RTWP of different subcarriers, so that the uplink interference level of each subcarrier cannot be determined, and thus the uplink power control cannot be performed. Summary of the invention

Embodiments of the present invention provide a power control method and device, which are mainly applied to a narrow bandwidth UMTS system.

A first aspect of the present invention provides a power control method, including:

When the user equipment accesses the network randomly, the i th uplink subcarrier is selected among the at least two uplink subcarriers, where i is a positive integer;

And calculating, according to the obtained uplink interference value of the ith uplink subcarrier, the initial uplink power value, where the initial uplink power value is the initial transmit power of the preamble. In a first possible implementation manner of the first aspect, the uplink interference value of the ith uplink subcarrier is obtained by:

The user equipment receives the system broadcast message, and the system broadcast message carries the uplink interference value of the i-th uplink subcarrier.

With reference to the first possible implementation manner of the first aspect of the present invention, in a second possible implementation manner of the first aspect of the present invention, if the user equipment is in a random access network, the channel used is a random access channel. The uplink interference value of the ith uplink subcarrier is an uplink interference value of the random access; if the channel used by the user equipment in the random access network is an enhanced random access channel, the ith uplink The uplink interference value of the carrier is the uplink interference value of the enhanced random access.

A second aspect of the present invention provides a power control method, including:

The network device obtains an uplink interference value of the i th uplink subcarrier in at least two uplink subcarriers, where i is a positive integer;

Determining a power offset of the dedicated physical control channel according to an uplink interference value of the i th uplink subcarrier;

Transmitting a power offset of the dedicated physical control channel to a user equipment that performs random access on the ith uplink subcarrier, so that the user equipment calculates a dedicated power offset according to the dedicated physical control channel. The initial transmit power of the transmitted data on the physical control channel.

In a first possible implementation manner of the second aspect of the present invention, the network device obtains an uplink interference value of the i th uplink subcarrier in the at least two uplink subcarriers, including:

The network device receives the total received bandwidth power of the i-th uplink sub-carrier reported by the access network device, and uses the received total bandwidth power value of the i-th uplink sub-carrier as the uplink interference value of the i-th uplink sub-carrier.

A third aspect of the present invention provides a power control method, including:

The access network device receives the target value of the uplink signal to noise ratio of the i th uplink subcarrier sent by the network device, where i is a positive integer;

Measuring an uplink signal to noise ratio of the user equipment on the i-th uplink subcarrier;

Comparing the measured value with the target value;

If the measured value is greater than or equal to the target value, the user equipment is instructed to reduce uplink transmit power; if the measured value is less than the target value, the user equipment is instructed to increase uplink transmit power. A fourth aspect of the present invention provides a user equipment, including:

a selection module, configured to select, on a random access, an i th uplink subcarrier, where i is a positive integer;

And a calculation module, configured to calculate a preliminary uplink power value of the preamble according to the obtained uplink interference value of the i th uplink subcarrier, where the initial uplink power value is a preamble initial transmit power.

In a first possible implementation manner of the fourth aspect of the present invention, the method further includes: an obtaining module, configured to obtain an uplink interference value of the i th uplink subcarrier;

The receiving unit is configured to receive a system broadcast message, where the system broadcast message carries an uplink interference value of the i th uplink subcarrier.

With reference to the first possible implementation manner of the fourth aspect of the present invention, in a second possible implementation manner of the fourth aspect of the present invention, if the user equipment is in a random access network, the channel used is a random access channel. The uplink interference value of the ith uplink subcarrier is an uplink interference value of the random access; if the channel used by the user equipment in the random access network is an enhanced random access channel, the ith uplink The uplink interference value of the carrier is the uplink interference value of the enhanced random access.

A fifth aspect of the present invention provides a network device, including:

An obtaining module, configured to obtain an uplink interference value of the i th uplink subcarrier in at least two uplink subcarriers, where i is a positive integer;

a determining module, configured to determine, according to an uplink interference value of the i th uplink subcarrier, a power offset of the dedicated physical control channel;

a sending module, configured to send a power offset of the dedicated physical control channel to a user equipment that performs random access on the i th uplink subcarrier, so that the user equipment is configured according to the power of the dedicated physical control channel The offset calculates the initial transmit power of the data transmitted on the dedicated physical control channel.

In a first possible implementation manner of the fifth aspect of the present invention, the determining module includes: a receiving unit, configured to receive a total bandwidth power of the ith uplink subcarrier reported by the access network device, where the The received total bandwidth power value of the i uplink subcarriers is used as the uplink interference value of the i th uplink subcarrier.

A sixth aspect of the present invention provides an access network device, including:

a receiving module, configured to receive a target value of an uplink signal to noise ratio of the i th uplink subcarrier sent by the network device, where i is a positive integer; a measuring module, configured to measure an uplink signal to noise ratio of the user equipment on the i th uplink subcarrier; and a comparing module, configured to compare the measured value with the target value;

The indication module is configured to: if the measured value is greater than or equal to the target value, instruct the user equipment to reduce uplink transmit power; if the measured value is less than the target value, instruct the user equipment to increase uplink transmit power.

A seventh aspect of the present invention provides a user equipment, including:

a first processor, configured to: when the user equipment randomly accesses, select an i th uplink subcarrier among the at least two uplink subcarriers, where i is a positive integer;

And a second processor, configured to calculate a preamble initial uplink power value according to the received uplink interference value of the i th uplink subcarrier, where the initial uplink power value is a preamble initial transmit power.

In a first possible implementation manner of the seventh aspect of the present invention, the user equipment further includes: a receiver, configured to receive a system broadcast message, where the system broadcast message carries the ith uplink subcarrier Uplink interference value.

With reference to the first possible implementation manner of the seventh aspect of the present invention, in a second possible implementation manner of the seventh aspect of the present invention, if the channel used by the first processor to access the network randomly is randomly connected In the channel, the uplink interference value of the ith uplink subcarrier is an uplink interference value of the random access; if the channel used by the first processor in the random access network is an enhanced random access channel, the The uplink interference value of the i uplink subcarriers is an uplink interference value of the enhanced random access.

An eighth aspect of the present invention provides a network device, including:

a receiver, configured to obtain an uplink interference value of the i th uplink subcarrier in at least two uplink subcarriers, where i is a positive integer;

a processor, configured to obtain, according to an uplink interference value of the i th uplink subcarrier, a power offset of the dedicated physical control channel;

a transmitter, configured to send a power offset of the dedicated physical control channel to a user equipment that performs random access on the ith uplink subcarrier, so that the user equipment is configured according to the power of the dedicated physical control channel The offset calculates the initial transmit power of the data transmitted on the dedicated physical control channel.

In a first possible implementation manner of the eighth aspect of the present invention, the receiver is further configured to: receive a total bandwidth power of the ith uplink subcarrier reported by the access network device, and send the ith uplink The received total bandwidth power value of the subcarrier is used as the uplink interference value of the i th uplink subcarrier.

A ninth aspect of the present invention provides an access network device, including: a receiver, configured to receive a target value of an uplink signal to noise ratio of the i th uplink subcarrier sent by the network device, where i is a positive integer;

a processor, configured to measure an uplink signal to noise ratio of the user equipment on the i th uplink subcarrier; compare the measured value with the target value;

And a transmitter, configured to: if the measured value is greater than or equal to the target value, instruct the user equipment to reduce uplink transmit power; if the measured value is less than the target value, instruct the user equipment to increase uplink transmit power.

The power control scheme provided by the embodiment of the present invention performs open loop power control according to the uplink interference level of different subcarriers, thereby ensuring the effectiveness and accuracy of the open loop power control. BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a flowchart of a power control method according to Embodiment 1 of the present invention;

2 is a flowchart of a power control method according to Embodiment 2 of the present invention;

3 is a flowchart of a power control method according to Embodiment 3 of the present invention;

4 is a schematic structural diagram of a user equipment according to Embodiment 4 of the present invention;

FIG. 5 is still another schematic structural diagram of a user equipment according to Embodiment 4 of the present invention;

FIG. 6 is a schematic structural diagram of a network device according to Embodiment 5 of the present invention;

Figure Ί is a schematic structural diagram of an access network device according to Embodiment 6 of the present invention;

8 is a schematic structural diagram of an access network device according to Embodiment 7 of the present invention;

FIG. 9 is still another schematic structural diagram of an access network device according to Embodiment 7 of the present invention;

FIG. 10 is a schematic structural diagram of a network device according to Embodiment 8 of the present invention;

FIG. 1 is a schematic structural diagram of an access network device according to Embodiment 9 of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Before introducing the specific implementation of the present application, the first thing that needs to be interpreted is that the user equipment and the network The communication on the network side can be divided into two phases, one is the access phase, and the other is the traffic communication phase. It can be seen that only the user equipment correctly accesses the network, so that the communication between the user equipment and the network side becomes possible. For the access phase, the user equipment first sends a random access preamble on the primary random access channel.

(Random Access Preamble, abbreviated as: RAP), which is equivalent to a knocking action, and the user equipment performs the open loop power control. That is to say, the user equipment will send more than one RAP. The initial transmission power is usually an attempt. The power is relatively small. It depends on whether the access network equipment can receive it. If it is not received, the transmission power of the next RAP will increase by one. The step size, knowing that the power is strong enough, the access network device can receive the signal from the user equipment. The RAP includes two pieces of information, a preamble signature (Preamble Signature) and a preamble scrambling code. The network side distinguishes which user the RAP is sent based on the preamble signature and the preamble scrambling code and the access slot in which it is located. After receiving the RAP sent by the user equipment, the access network device notifies the user equipment that the specific access request message can continue to be sent through the Acquisition Indication Channel (AICH). The Acquisition Indication (AI) on the AICH corresponds to the signature of the Physical Random Access Channel (PRACH). The user equipment sends access information on the PRACH. After receiving the access information sent by the user equipment on the PRACH, the access network device allocates a dedicated physical control channel (DPCCH) or a dedicated physical data channel (Dedicated Physical Data Channel). : DPDCH ) and other dedicated channels, and notify the user equipment, and then the user equipment can go to the dedicated channel allocated by the access network device for registration or location update.

Embodiment 1

1 is a flowchart of a power control method according to Embodiment 1 of the present invention. The method is mainly used for controlling initial transmit power. As shown in FIG. 1, the method includes:

5101. When the user equipment accesses the network randomly, the i th uplink subcarrier is selected in at least two uplink subcarriers, where i is a positive integer.

The selection of the i-th uplink subcarrier may be random, or may be selected according to the load condition indicated by the network.

The user equipment calculates an initial uplink power value of the preamble according to the obtained uplink interference value of the i th uplink subcarrier, where the initial uplink power value is a preamble initial transmission power.

In an implementation manner, the user equipment may obtain an uplink interference value of the ith uplink subcarrier by: receiving a system broadcast message, where the system broadcast message carries the ith uplink subcarrier The upstream interference value of the wave. Specifically, the system broadcast message may be a System Information Block (abbreviation: 818) 5 or 8187. The uplink interference value of the ith uplink subcarrier carried in the system broadcast message may be set by the access network device for the ith uplink subcarrier.

The step of obtaining the uplink interference value of the i-th uplink sub-carrier may occur before or after the step S101, or may occur when the UE performs the random access procedure.

Random access can be divided into traditional random access and enhanced random access. The uplink channel used by the traditional random access is a random access channel (Rand Access Channel, RACH for short), and the channel used for enhanced random access is an Enhanced Random Uplink Channel (E-referred to as: E- RUCH ). The process of performing random access on the two channels is basically the same, and the uplink synchronization code used for access can be divided into two sub-groups for RACH and E-RUCCH access, respectively. The network device can distinguish between the two types of random access by identifying the subgroup to which the uplink synchronization code belongs. It is also because the power and radio resources used by the two random accesses are different, and the generated interference levels are also different. Therefore, the uplink interference level of each uplink subcarrier can be further divided into random access interference values and enhancements. Random access interference value. Therefore, in another implementation manner, the uplink interference value of the i th uplink subcarrier may include: a random access interference value or an enhanced random access interference value. Then, the user equipment obtains the uplink interference value of the ith uplink subcarrier may include: if the uplink channel used for the random access is the RACH, the user equipment obtains the random access interference value of the ith uplink subcarrier; The uplink channel used is an E-RUCH, and the user equipment obtains an enhanced random access interference value of the ith uplink subcarrier.

The initial uplink power value of the preamble can be calculated by the existing method or by the following method.

Preamble— Initial— Power=Primary CPICH TX Power-CPICH—PSCP+UL interference+Constant Value

Preamble—Initial—Power is the preamble initial uplink power value, Primary CPICH TX

Power is the transmit power value of the common common channel, CPICH-PSCP is the received power value of the common pilot channel, UL interference is the uplink interference value, and Constant Value is a constant value. The transmit power and the constant value of the primary common channel are notified to the UE by the system broadcast (such as in SIB5), and the received power of the common pilot channel is the measured value of the UE, and the constant value is used to compensate for random access or enhanced random access. Process the gain. The power control method provided by the embodiment of the invention performs open loop power control according to the uplink interference level of different subcarriers, thereby ensuring the effectiveness and accuracy of the open loop power control.

Embodiment 2

2 is a flowchart of a power control method according to Embodiment 2 of the present invention. The method is mainly used for controlling initial transmission power when a user equipment performs registration or location update on a DPCCH allocated to itself, as shown in FIG. 2, The method includes:

5201. The network device obtains an uplink interference value of the i th uplink subcarrier in at least two uplink subcarriers, where i is a positive integer.

The network device may be a radio network controller (Radio Network Controller, RNC for short) or a base station controller.

The network device determines the power offset of the dedicated physical control channel (DPCCH) according to the uplink interference value of the i-th uplink sub-carrier, and sends the power offset of the DPCCH to the user equipment, The user equipment is caused to calculate an initial transmit power of the data transmitted on the DPCCH according to the power offset of the DPCCH.

In an implementation manner, because the RTWP can effectively reflect the total noise received by the network device, the network device can obtain the uplink interference value of the i-th uplink sub-carrier by obtaining the RTWP of the i-th uplink sub-carrier. Specifically, the network device obtains the RTWP of the i-th uplink sub-carrier by the network device: the network device instructs the access network device to report the RTWP of the i-th uplink sub-carrier; and receives the RTWP of the i-th uplink sub-carrier reported by the base station. Here, the access network device may also actively report the RTWP of each uplink subcarrier. This embodiment does not specifically limit it.

The specific calculation method of the power offset of the DPCCH may be:

DPCCH_Power_Offset=PCPICHPower+Uplink Interference+Constant Value where DPCCH—Power—Offset is the power offset of the dedicated physical control channel, and PCPICHPower is the pilot transmit power, which is set by the network plan and sent by the network side to the UE in SIB5. Uplink Interference is the uplink interference level, obtained by the base station measuring each uplink subcarrier, and carried in the SIB5 or SIB7 to the UE; Constant Value is a constant value to compensate for the processing gain of random access or enhanced random access. Obtained by the method set in the network plan.

The specific calculation method of the initial transmission power of the DPCCH may be:

DPCCH Initial Power=DPCCH Power offset - CRICH RSCP The DPCCH_Initial Power is the initial transmit power of the dedicated physical control channel, and the CRICH RSCP is the received signal code power (Received Signal Code Power, RSCP) of the common pilot obtained by the UE.

The power control method provided by the embodiment of the invention performs open loop power control according to the uplink interference level of different subcarriers, thereby ensuring the effectiveness and accuracy of the open loop power control.

Embodiment 3

FIG. 3 is a flowchart of a power control method according to Embodiment 3 of the present invention. The method is mainly used for power control of a user equipment by an access network device after the user equipment accesses the network. As shown in FIG. 3, the method includes:

S301. The access network device receives a target value (SIR target ) of an uplink signal to noise ratio of the i th uplink subcarrier sent by the network device.

S302. The access network device measures an uplink signal to noise ratio (Signal to Interference Ratio, SIR) of the UE on the ith uplink subcarrier, and compares the measured SIR with the received uplink SNR target value. ;

If the measured value is greater than or equal to the target value, then executing S303;

If the measured value is less than the target value, then S304 is performed.

S303. The access network device instructs the UE to reduce uplink transmit power.

S304. The access network device instructs the UE to increase uplink transmit power.

The power control method provided by the embodiment of the present invention is to enable the network side to better serve the user equipment. That is, the base station controller may configure a respective SIR target for each uplink subcarrier, and the base station performs inner loop power control according to the uplink signal to noise ratio target value. Further, each uplink subcarrier can also be configured with different uplink SNR target values for differentiated Quality of Service (QoS) control. Then the SIR target used in S301 should be the SIR target of the i th uplink subcarrier used by the UE.

It should be noted that for the above three embodiments, since the three embodiments occur at different stages of the user equipment accessing the network, the above embodiments may be used alone or in any combination. For example, the first embodiment is combined with the second embodiment, the first embodiment is combined with the embodiment three-phase, the second embodiment is combined with the embodiment three-phase, the first embodiment is combined with the second embodiment and the third embodiment, and the like.

Embodiment 4

4 is a schematic structural diagram of a user equipment according to Embodiment 4 of the present invention, and it should be noted that The user equipment is one of the execution entities in the foregoing method embodiment, and the specific working process may refer to the method embodiment, and details are not described herein. As shown in FIG. 4, the user equipment includes: a selection module 401 and a calculation module 402. The selecting module 401 is configured to select an i th uplink subcarrier in at least two uplink subcarriers when the data is randomly accessed, where i is a positive integer, and randomly accesses the network on the i th uplink subcarrier; The module 402 is configured to calculate an initial uplink power value of the preamble according to the obtained uplink interference value of the ith uplink subcarrier, where the initial uplink power value is the initial transmit power of the preamble.

As shown in FIG. 5, the user equipment further includes: an obtaining module 403, configured to obtain an uplink interference value of the ith uplink subcarrier, where the method further includes: a receiving unit, configured to receive a system broadcast message, where the system broadcast message carries the first The uplink interference value of i uplink subcarriers.

On the basis of the foregoing embodiment, if the channel used by the user equipment in the random access network is a random access channel, the uplink interference value of the ith uplink subcarrier is an uplink interference value of the random access; The channel used by the user equipment when accessing the network is an enhanced random access channel, and the uplink interference value of the ith uplink subcarrier is an uplink interference value of the enhanced random access.

Embodiment 5

FIG. 6 is a schematic structural diagram of a network device according to Embodiment 5 of the present invention. It should be noted that the network device is one of the execution entities in the foregoing method embodiment, and the specific working process may refer to the method embodiment, where not Narration. The network device can be an RNC, a base station controller, or the like. As shown in FIG. 6, the network device includes: an obtaining module 601, a determining module 602, and a sending module 603, where the obtaining module 601 is configured to obtain an uplink interference value of the ith uplink subcarrier in at least two uplink subcarriers, where i is The determining module 602 is configured to determine a power offset of the dedicated physical control channel according to the uplink interference value of the i th uplink subcarrier; and the sending module 603 is configured to send the power offset of the dedicated physical control channel to the i th uplink The subcarrier performs a random access user equipment, so that the user equipment calculates an initial transmission power for transmitting data on the dedicated physical control channel according to the power offset of the dedicated physical control channel.

In an embodiment, the determining module 602 includes: a receiving unit, configured to receive a total received bandwidth power of the ith uplink subcarrier reported by the access network device, and receive a total bandwidth power value of the ith uplink subcarrier. As the uplink interference value of the i-th uplink subcarrier.

Embodiment 6

FIG. 7 is a schematic structural diagram of an access network device according to Embodiment 6 of the present invention. It should be noted that the access network device is one of the execution entities in the foregoing method embodiment, and the specific workflow may be The method of the test method is not mentioned here. As shown in FIG. 7, the access network device includes: a receiving module 701, a measuring module 702, a comparing module 703, and an indicating module 704. The receiving module 701 is configured to receive a target value of an uplink SNR of the ith uplink subcarrier that is sent by the network device, where i is a positive integer. The measurement module 702 is configured to measure uplink of the user equipment on the ith uplink subcarrier. The signal-to-noise ratio; the comparison module 703 is configured to compare the measured value with the target value; the indication module 704 is configured to: if the measured value is greater than or equal to the target value, instruct the user equipment to reduce the uplink transmit power; if the measured value is less than the target value, the user equipment is indicated to be improved. Uplink transmit power.

Example 7

FIG. 8 is a schematic structural diagram of an access network device according to Embodiment 7 of the present invention. It should be noted that the access network device is one of the execution entities in the foregoing method embodiment, and the specific working process may refer to the method embodiment. No comment here. As shown in FIG. 8, the user equipment includes: a first processor 801 and a second processor 802. The first processor 801 is configured to select an i-th uplink sub-carrier among the at least two uplink sub-carriers when the user equipment randomly accesses, where i is a positive integer. The second processor 802 is configured to calculate a preamble initial uplink power value according to the received uplink interference value of the i th uplink subcarrier, where the initial uplink power value is a preamble initial transmit power.

In an embodiment, as shown in FIG. 9, the user equipment may further include: a receiver 803, configured to receive a system broadcast message, where the system broadcast message carries an uplink interference value of the ith uplink subcarrier. .

On the basis of any of the above embodiments, if the channel used by the first processor in the random access network is a random access channel, the uplink interference value of the ith uplink subcarrier is a random access uplink. The interference value is: if the channel used by the first processor in the random access network is an enhanced random access channel, the uplink interference value of the ith uplink subcarrier is an uplink interference value of the enhanced random access.

Example eight

10 is a schematic structural diagram of a network device according to Embodiment 8 of the present invention. It should be noted that the network device is one of the execution entities in the foregoing method embodiment, and the specific working process may refer to the method embodiment, where not Narration. As shown in FIG. 10, the network device includes: a receiver 1001, a processor 1002, and a transmitter 1003. The receiver 1001 is configured to obtain an uplink interference value of the ith uplink subcarrier in at least two uplink subcarriers, where i is a positive integer. The processor 1002 is configured to obtain a power offset of the dedicated physical control channel according to the uplink interference value of the i-th uplink subcarrier. hair The transmitter 1003 is configured to send a power offset of the dedicated physical control channel to a user equipment that performs random access on the ith uplink subcarrier, so that the user equipment is configured according to the power of the dedicated physical control channel. The offset calculates the initial transmit power of the data transmitted on the dedicated physical control channel.

In an embodiment, the receiver 1001 is further configured to: receive the total received bandwidth power of the ith uplink subcarrier reported by the access network device, and use the received total bandwidth power value of the i th uplink subcarrier as the i th The uplink interference value of the uplink subcarriers.

Example nine

FIG. 11 is a schematic structural diagram of an access network device according to Embodiment 9 of the present invention. It should be noted that the access network device is one of the execution entities in the foregoing method embodiment, and the specific working process may refer to the method embodiment. I will not repeat them here. As shown in FIG. 11, the access network device includes: a receiver 1101, a processor 1102, and a transmitter 1103. The receiver 1101 is configured to receive a target value of an uplink SNR of the ith uplink subcarrier that is sent by the network device, where i is a positive integer. The processor 1102 is configured to measure uplink of the user equipment on the ith uplink subcarrier. a signal-to-noise ratio; comparing the measured value with the target value; the transmitter 1103 is configured to: if the measured value is greater than or equal to the target value, instructing the user equipment to decrease uplink transmit power; if the measured value is greater than or equal to The target value is used to indicate that the user equipment increases uplink transmit power.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to program instructions, and the foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The method includes the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

claims

1. A power control method, characterized by including:

When the user equipment randomly accesses the network, it selects the i-th uplink subcarrier among at least two uplink subcarriers, where i is a positive integer;

Calculate the initial uplink power value of the preamble based on the obtained uplink interference value of the i-th uplink subcarrier, where the initial uplink power value is the initial transmit power of the preamble.

2. The method according to claim 1, characterized in that the uplink interference value of the i-th uplink subcarrier is obtained in the following manner, including:

The user equipment receives a system broadcast message, and the system broadcast message carries the uplink interference value of the i-th uplink subcarrier.

3. The method according to claim 1 or 2, characterized in that, if the channel used by the user equipment when randomly accessing the network is a random access channel, the uplink interference value of the i-th uplink subcarrier is The uplink interference value of random access; If the channel used by the user equipment when randomly accessing the network is the enhanced random access channel, the uplink interference value of the i-th uplink subcarrier is the uplink interference value of enhanced random access .

4. A power control method, characterized by including:

The network device obtains the uplink interference value of the i-th uplink subcarrier among at least two uplink subcarriers, where i is a positive integer;

The power offset of the dedicated physical control channel is sent to the user equipment performing random access on the i-th uplink subcarrier, so that the user equipment calculates the dedicated physical control channel based on the power offset of the dedicated physical control channel. The initial transmit power for sending data on the physical control channel.

5. The method according to claim 4, characterized in that the network device obtains the uplink interference value of the i-th uplink subcarrier among at least two uplink subcarriers, including:

The network device receives the received total bandwidth power of the i-th uplink subcarrier reported by the access network device, and uses the received total bandwidth power value of the i-th uplink subcarrier as the uplink interference value of the i-th uplink subcarrier.

6. A power control method, characterized by including:

The access network equipment receives the target value of the uplink signal-to-noise ratio of the i-th uplink subcarrier sent by the network equipment, where i is a positive integer;

Measure the uplink signal-to-noise ratio of the user equipment on the i-th uplink subcarrier; Compare the measured value to the target value;

If the measured value is greater than or equal to the target value, instruct the user equipment to reduce the uplink transmit power; if the measured value is less than the target value, instruct the user equipment to increase the uplink transmit power.

7. A user equipment, characterized by: including:

A selection module configured to select the i-th uplink subcarrier among at least two uplink subcarriers during random access, where i is a positive integer;

A calculation module, configured to calculate the initial uplink power value of the preamble based on the obtained uplink interference value of the i-th uplink subcarrier, where the initial uplink power value is the initial transmit power of the preamble.

8. The user equipment according to claim 7, further comprising: an obtaining module, configured to obtain the uplink interference value of the i-th uplink subcarrier; specifically including:

A receiving unit, configured to receive a system broadcast message, where the system broadcast message carries the uplink interference value of the i-th uplink subcarrier.

9. The user equipment according to claim 8, characterized in that, if the channel used by the user equipment when randomly accessing the network is a random access channel, the uplink interference value of the i-th uplink subcarrier is random. Access uplink interference value; If the channel used by the user equipment when randomly accessing the network is an enhanced random access channel, the uplink interference value of the i-th uplink subcarrier is the uplink interference value of enhanced random access.

10. A network device, characterized by: including:

Obtaining module, used to obtain the uplink interference value of the i-th uplink subcarrier in at least two uplink subcarriers, i is a positive integer;

Determining module, configured to determine the power offset of the dedicated physical control channel according to the uplink interference value of the i-th uplink subcarrier;

A sending module, configured to send the power offset of the dedicated physical control channel to the user equipment performing random access on the i-th uplink subcarrier, so that the user equipment can perform random access according to the power of the dedicated physical control channel. The offset calculates the initial transmit power for sending data on the dedicated physical control channel.

11. The network device according to claim 10, characterized in that the determining module includes: a receiving unit, configured to receive the received total bandwidth power of the i-th uplink subcarrier reported by the access network device, and convert the i-th uplink subcarrier into The received total bandwidth power value of the i uplink sub-carrier is used as the uplink power value of the i-th uplink sub-carrier. row interference value.

12. An access network device, characterized by: including:

The receiving module is used to receive the target value of the uplink signal-to-noise ratio of the i-th uplink subcarrier sent by the network device, where i is a positive integer;

A measurement module, used to measure the uplink signal-to-noise ratio of the user equipment on the i-th uplink subcarrier; a comparison module, used to compare the measured value with the target value;

An instruction module configured to instruct the user equipment to reduce the uplink transmission power if the measured value is greater than or equal to the target value; to instruct the user equipment to increase the uplink transmission power if the measured value is less than the target value.

13. A user equipment, characterized by: including:

The first processor is used to select the i-th uplink subcarrier from at least two uplink subcarriers when the user equipment is randomly accessed, where i is a positive integer;

The second processor is configured to calculate the initial uplink power value of the preamble based on the obtained uplink interference value of the i-th uplink subcarrier, where the initial uplink power value is the initial transmit power of the preamble.

14. The user equipment according to claim 13, characterized in that the user equipment further includes:

A receiver configured to receive a system broadcast message, where the system broadcast message carries the uplink interference value of the i-th uplink subcarrier.

15. The user equipment according to claim 13 or 14, characterized in that, if the channel used by the first processor when randomly accessing the network is a random access channel, the uplink of the i-th uplink subcarrier The interference value is the uplink interference value of random access; if the channel used by the first processor when randomly accessing the network is the enhanced random access channel, the uplink interference value of the i-th uplink subcarrier is the enhanced random access channel. input uplink interference value.

16. A network device, characterized by including:

The receiver is used to obtain the uplink interference value of the i-th uplink subcarrier in at least two uplink subcarriers, where i is a positive integer;

A processor, configured to obtain the power offset of the dedicated physical control channel according to the uplink interference value of the i-th uplink subcarrier;

A transmitter configured to send the power offset of the dedicated physical control channel to the user equipment performing random access on the i-th uplink subcarrier, so that the user equipment performs random access according to the dedicated physical control channel. The control channel power offset calculates the initial transmit power for sending data on a dedicated physical control channel.

17. The network device according to claim 16, wherein the receiver is further configured to: receive the received total bandwidth power of the i-th uplink subcarrier reported by the access network device, and convert the i-th uplink subcarrier into The total received bandwidth power value of the subcarriers is used as the uplink interference value of the i-th uplink subcarrier.

18. An access network device, characterized by: including:

The receiver is used to receive the target value of the uplink signal-to-noise ratio of the i-th uplink subcarrier sent by the network device, where i is a positive integer;

A processor, configured to measure the uplink signal-to-noise ratio of the user equipment on the i-th uplink subcarrier; compare the measured value with the target value;

The transmitter is configured to instruct the user equipment to reduce the uplink transmit power if the measured value is greater than or equal to the target value; and instruct the user equipment to increase the uplink transmit power if the measured value is less than the target value.