WO2015039593A1

WO2015039593A1 - Method and device for determining initial transmission power

Info

Publication number: WO2015039593A1
Application number: PCT/CN2014/086672
Authority: WO
Inventors: 胡文权; 花梦
Original assignee: 华为技术有限公司
Priority date: 2013-09-18
Filing date: 2014-09-17
Publication date: 2015-03-26
Also published as: CN104469919A

Abstract

Disclosed are a method and device for determining initial transmission power, the method comprising: a UE receives first information transmitted by a combined cell, the first information carrying an uplink receiving indication and M power parameters, the uplink receiving indication being used to indicate the uplink receiving mode of the combined cell, the M power parameters respectively having one-to-one correspondence with M nodes in the combined cell, M being a positive integer greater than 1, the power parameter corresponding to any node being determined according to the target signal to interference-plus-noise ratio of the combined cell, the interference noise of the node and the transmission power of a pilot channel; the UE acquires the receiving power of M pilot channels respectively between the UE and the M nodes, the M pilot channels employing the same scrambling code and different channelization codes; and according to the uplink receiving indication, the UE utilizes the M power parameters and the receiving power of the M pilot channels to determine the initial transmission power of the uplink control channel of the UE.

Description

Method and device for determining initial transmission power

This application claims priority to Chinese Patent Application No. 201310430681.0, entitled "A Method and Apparatus for Determining Initial Transmit Power", filed on September 18, 2013, the entire contents of which are incorporated herein by reference. In this application.

Technical field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for determining initial transmit power.

Background technique

Referring to FIG. 1, a joint cell includes a plurality of nodes and a central scheduler (S). There are both high power nodes and low power nodes in a combined cell. All nodes are connected to the central scheduler through a high bandwidth, low latency link. Each node in the same joint cell uses the same scrambling code when transmitting downlink data.

The reason why the P-pilot channel received by the user equipment (UE, User Equipment) is strong is caused by the fact that each node uses the same scrambling code and channelization code to transmit the P-CPICH (Primary Common Pilot Channel). Not necessarily because the UE is closer to a certain node, or because the P-pilot channel is a superposition of P-pilot channels transmitted by multiple nodes, so even if the UE receives the comparison A strong P-pilot channel also does not mean that the UE is closer to a node.

The power configuration of the existing open loop power control is based on the condition that the uplink path loss and the downlink path loss are approximately equal, wherein the uplink open loop power control is implemented by compensating the path loss. The following is the configuration process of the initial transmit power of the uplink control channel in the existing uplink open loop industrial control method:

The initial transmit power of the Dedicated Physical Control Channel (DPCCH) signal is obtained by the following process:

DPCCH_Initial_power=DPCCH_Power_offset–CPICH_RSCP

Where

DPCCH_Power_offset shall have the value of IE "DPCCH Power offset" in IE "Uplink DPCH power control info"

The above process can be transformed into the following formula:

DPCCH_Initial_power=DPCCH_Power_offset–CPICH_RSCP= DPCCH_Power_offset–(TxPow_CPICH–PL)=DPCCH_Power_offset–TxPow_CPICH+PL

In the above formula, DPCCH_Initial_power represents the initial transmit power of the DPCCH signal, DPCCH_Power_offset represents the offset of the actual transmit power of the DPCCH signal, CPICH_RSCP represents the measured value of the pilot channel (CPICH, Common Pilot Channel) signal, and TxPow_CPICH represents the transmission of the pilot channel. Power, PL represents the path loss.

Referring to FIG. 2, a central cell includes a High Power Node (HPN) and a Low Power Node (LPN). In Figure 2, UE5, UE6 and UE7 are closer to HPN and LPN, and UE1, UE2, UE3, UE4 and UE8 are farther away from HPN and LPN.

When UE1 configures the initial uplink transmit power through the existing uplink open loop industrial control method, since the downlink signal received by the UE1 from the LPN is weak, the UE needs to increase the initial transmit power of the uplink control channel to compensate the joint cell/macrocell. (Macro) to the path loss of UE1, which causes the initial transmit power of the uplink control channel received by the LPN to be too high, thereby causing interference to the uplink control channel transmitted by other UEs received by the LPN, and the initial transmission of the uplink control channel. Excessive power also causes a waste of UE energy.

Summary of the invention

The embodiments of the present invention provide a method and a device for determining initial transmit power, which are used to solve the problem of uplink control channel interference and UE energy waste caused by excessive initial transmit power of an uplink control channel of a remote UE in the prior art.

In a first aspect, an embodiment of the present invention provides a method for determining initial transmit power, including:

The user equipment UE receives the first information sent by the joint cell, where the first information carries an uplink receiving indication and an M power parameter, where the uplink receiving indication is used to indicate an uplink receiving manner of the joint cell, The M power parameters are respectively corresponding to the M nodes in the joint cell, and M is a positive integer greater than 1. The power parameter corresponding to any node is based on the target signal to interference and noise ratio of the joint cell and the node. The interference noise and the transmit power of the pilot channel are determined;

Obtaining, by the UE, the received power of the M pilot channels between the UE and the M nodes, where the M pilot channels use the same scrambling code and different channelization codes;

And determining, by the UE, the initial transmit power of the uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels according to the uplink receiving indication.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the UE is configured according to the uplink And determining, by using the M power parameters and the received power of the M pilot channels, the initial transmit power of the uplink control channel of the UE, including:

When the uplink receiving mode indicated by the uplink receiving indication is an uplink selective receiving combined receiving mode, the UE determines the initial transmit power according to the following formula:

Wherein P _u represents the initial transmit power, PO _k represents a power parameter corresponding to the kth node of the M nodes, and P _dr,k represents a pilot corresponding to the kth node of the M nodes Receive power of the channel;

When the PO _k is a first type of power parameter, the PO _{k is} proportional to the target signal to interference and noise ratio, the interference noise of the kth node, and the transmission power of the pilot channel;

When the PO _k is a second type of power parameter, the PO _{1 is} proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the first node, and the pilot channel transmission power; PO _k and the first The interference noise of one node is proportional to the transmit power of the pilot channel, and PO _k is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel, where k is greater than 1, and is not greater than M. A positive integer.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the UE determines, by using the M power parameters and the received power of the M pilot channels, according to the uplink receiving indication, The initial transmit power of the uplink control channel of the UE includes:

When the uplink receiving indication is the uplink maximum ratio combining MRC receiving mode, and the power parameter is the first type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, and PO ₁ , PO _{2 ,} . . . , PO _M respectively represent a first type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P _{dr , 1} P _{dr, 2} ... P _{dr, M} respectively represent the pilot channel received power of the first node to the Mth node of the M nodes, wherein the first type of power parameter corresponding to any node, The target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power are all proportional.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the UE, according to the uplink receiving indication, uses the M power parameters and the M different pilot channel received powers to calculate an initial transmission. The power value is determined, and the initial transmit power is determined as an initial transmit power of the uplink control channel of the UE, and specifically includes:

The UE receives, in the uplink, an uplink maximum ratio combining MRC receiving mode, and when the power parameter is a second type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, and PO ₁ , PO _{2 ,} . . . , PO _M respectively represent a second type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P _{dr , 1} P _{dr, 2} . . . P _{dr, M} respectively represent pilot channel received power of the first node to the Mth node of the M nodes, wherein the first node of the M nodes corresponds to The second type of power parameter is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power; and the second type of power parameter of the kth node of the M nodes And the interference noise of the first point is proportional to the transmit power of the pilot channel, and is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel, where k is greater than 1, and not A positive integer greater than M.

With reference to the first aspect, or any one of the foregoing possible implementation manners of the first aspect, in a fourth possible implementation manner of the first aspect, the pilot channel is a common pilot channel CPICH, and the uplink control channel is Dedicated physical control channel DPCCH.

In a second aspect, an embodiment of the present invention provides a method for sending information, including:

Carrying, in the first information, an uplink receiving indication of the joint cell, and M power parameters corresponding to the M nodes in the joint cell, where the power parameter of any node is according to the joint cell target signal to interference and noise ratio, Determined by the interference noise of the node and the transmit power of the pilot channel, M is a positive integer greater than one;

And transmitting, by the user equipment, the first information, to enable the UE to determine an initial transmit power of the uplink control channel by using the M power parameters according to the uplink receiving indication.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the uplink receiving indication includes an uplink selective receiving manner or an uplink maximum ratio combining MRC receiving manner.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the M power parameters of the M nodes respectively include M first type power parameters, where the first node corresponds to the first The power class parameter is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power;

M power parameters corresponding to each of the M nodes, including M second type power parameters, where the M The second type of power parameter corresponding to the first node of the nodes is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power; among the M nodes The second type of power parameter of the kth node is proportional to the interference noise of the first point and the transmit power of the pilot channel, and inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel. Where k is a positive integer greater than one and not greater than M.

With reference to the second aspect, or any one of the foregoing possible implementation manners of the second aspect, in a third possible implementation manner of the second aspect, the pilot channel is a common pilot channel (CPICH), the uplink control channel It is a dedicated physical control channel DPCCH.

In a third aspect, the embodiment of the present invention provides a user equipment, including: a receiving module, configured to receive first information sent by a joint cell, where the uplink receiving indication is used to indicate an uplink receiving manner of the joint cell, where The M power parameters are respectively corresponding to the M nodes in the joint cell, and M is a positive integer greater than 1. The power parameter corresponding to any node is based on the target signal to interference and noise ratio in the joint cell. The interference noise of the node and the pilot channel transmit power are determined;

An acquiring module, configured to acquire received power of M pilot channels between the UE and the M nodes, where the received power of the M pilot channels, where the M pilot channels are Adopt the same scrambling code and different channelization codes;

And a determining module, configured to determine, according to the uplink receiving indication, the initial transmit power of the uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the determining module is specifically configured to:

When the uplink reception indication is the uplink selection reception mode, the initial transmission power value of the uplink control channel is determined according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, PO _k represents a power parameter corresponding to a kth node of the M nodes, and P _dr,k represents a kth node corresponding to the M nodes. The pilot channel receives power, and k is a positive integer not greater than M;

When the PO _k is a first type of power parameter, the PO _{k is} proportional to the target signal to interference and noise ratio, the interference noise of the kth node, and the pilot channel transmission power; or

With reference to the third aspect, in a second possible implementation manner of the third aspect, the determining module is specifically configured to:

When the uplink receiving indication is an uplink maximum ratio combining MRC receiving mode, and the power parameter is a first type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

With reference to the third aspect, in a third possible implementation manner of the third aspect, the determining module is specifically configured to:

When the uplink receiving indication is an uplink maximum ratio combining MRC receiving mode, and the power parameter is a second type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the pilot channel is a common pilot channel CPICH, and the uplink control channel is a dedicated physical control channel DPCCH.

In a fourth aspect, an embodiment of the present invention further provides an information sending system, including M nodes and a central scheduler, where:

The central scheduler carries an uplink receiving indication of the joint cell in the first information, and the joint small M power parameters corresponding to each of the M nodes in the area, wherein the power parameter of any node is determined according to the joint cell target signal to interference and noise ratio, the interference noise of the node, and the transmit power of the pilot channel, where M is a positive integer greater than one;

The M nodes send the first information to the user equipment UE according to the indication of the central scheduler, so that the UE determines the initial of the uplink control channel by using the M power parameters according to the uplink receiving indication. Transmit power.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the uplink receiving indication includes an uplink selective receiving manner or an uplink maximum ratio combining MRC receiving manner.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the uplink receiving indication includes an uplink selective receiving manner or an uplink maximum ratio combining MRC receiving manner;

The M power parameters corresponding to the M nodes, including the M first type power parameters, where the first type of power parameter corresponding to any node, the target signal to interference and noise ratio of the joint cell, and the node Both the interference noise and the pilot channel transmit power are proportional;

The M power parameters corresponding to the M nodes respectively include M second type power parameters, wherein the second type power parameter corresponding to the first node of the M nodes and the target of the joint cell The signal to interference and noise ratio, the interference noise of the node, and the pilot channel transmission power are all proportional; the second type of power parameter of the kth node of the M nodes, and the interference noise and the guide of the first point The frequency channel transmit power is proportional to each other, and is inversely proportional to the interference noise of the kth node and the pilot channel transmit power, where k is a positive integer greater than 1, and not greater than M.

With reference to the fourth aspect, in any one of the foregoing possible implementation manners of the fourth aspect, the pilot channel is a common pilot channel CPICH, and the uplink control channel is a dedicated physical control channel DPCCH.

The embodiment of the present invention obtains an uplink receiving indication of the joint cell carried in the first information sent by the base station and M power parameters corresponding to each of the M nodes in the joint cell, where the corresponding power parameter of any node is based on the target signal of the joint cell The dry noise ratio and the interference noise of the node and the transmit power of the pilot channel are determined based on the uplink reception indication, the M power parameters, and the received power of the M pilot channels between the UE and the M nodes respectively. Determining the initial transmit power of the uplink control channel can avoid the excessively high configuration of the transmit power of the uplink control channel while ensuring the quality of the uplink control channel received by the node, thereby avoiding waste of the uplink control channel transmit power and saving the energy of the UE.

DRAWINGS

1 is a schematic diagram of a joint cell;

2 is a schematic diagram of a UE in a joint cell;

3 is a flowchart of a method for determining initial transmit power designed according to an embodiment of the present invention;

4 is a schematic diagram of a joint cell in an embodiment of the present invention;

FIG. 5 is a flowchart of a method for sending information according to an embodiment of the present invention; FIG.

FIG. 6 is a schematic structural diagram of an apparatus for determining initial transmit power according to an embodiment of the present invention; FIG.

FIG. 7 is a schematic structural diagram of a user equipment designed according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of an information sending system designed according to an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the 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 those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

Referring to FIG. 3, an embodiment of the present invention provides a method for determining initial transmit power, including the following steps.

Step 301: The UE receives the first information sent by the joint cell, where the first information carries an uplink receiving indication and an M power parameter, where the uplink receiving indication is used to indicate an uplink receiving manner of the joint cell, where the M is The power parameters are respectively corresponding to the M nodes in the joint cell, and M is a positive integer greater than 1. The power parameter corresponding to any node is based on the target signal to interference and noise ratio of the joint cell and the interference noise and the guide of the node. The transmit power of the frequency channel is determined.

Step 302: The UE acquires the received power of the M pilot channels between the UE and the M nodes, where the M pilot channels use the same scrambling code and different channelization codes.

In practical applications, the joint cell may include M nodes and a central scheduler. Since the M pilot channels adopt the same scrambling code and different channelization codes, the UE can identify the transmitting node of the signal according to the signal received based on the pilot channel.

Step 303: The UE determines, according to the uplink receiving indication, the initial transmit power of the uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels.

In the above steps, M indicates the number of nodes in the joint cell that receive the uplink control channel sent by the UE, and M is not greater than the total number of nodes in the joint cell.

The execution subject UE of the foregoing step may be a mobile terminal that communicates with one or more core networks via a Radio Access Network (RAN). The mobile terminal can be a mobile phone (or "cellular" phone) or a computer with a mobile terminal, for example, a portable, pocket, handheld, computer built-in or in-vehicle mobile device with a wireless access network Exchange language and/or data. For another example, the mobile terminal may be a Personal Communication Service (PCS) telephone, a cordless telephone, a Session Initiation Protocol (SIP), a Wireless Local Loop (WLL) station, and a personal digital assistant. Devices such as (PDA, Personal Digital Assistant), Subscriber Unit, Subscriber Station, Mobile Station, Mobile, Remote Station, Access Point ), Remote Terminal, Access Terminal, User Terminal, User Agent, User Device.

Preferably, the power parameter may be a first type power parameter or a second type power parameter.

The first type of power parameter corresponding to any node is proportional to the target signal to interference ratio (SINR, Signal to Interference plus Noise Ratio) of the joint cell, the interference noise of the node, and the pilot channel transmission power.

The second type of power parameter corresponding to the first node of the M nodes is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the transmit power of the pilot channel;

The second type of power parameter of the kth node of the foregoing M nodes is proportional to the interference noise of the first point and the transmit power of the pilot channel, and the interference noise and the pilot channel of the kth node are The transmit power is inversely proportional, where k is a positive integer greater than one and not greater than M.

In the embodiment of the present invention, since the first type of power parameter and the second type of power parameter are related to the target SINR, the UE can make the uplink control channel after transmitting the uplink control channel to the node by using the initial transmit power determined according to the foregoing manner. The SINR of the uplink control channel received by the node reaches the target SINR more quickly, so as to prevent the uplink control channel transmitted by the UE from interfering with the uplink control channel of other UEs.

The uplink receiving mode may be an uplink selective receiving mode or an uplink maximum ratio combining (MRC) receiving mode.

Preferably, the foregoing step 303 can be implemented by any one of the following three methods:

method one:

When the uplink receiving indication is the uplink selective receiving mode, the UE determines an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, PO _k represents a power parameter corresponding to a kth node of the M nodes, and P _dr,k represents a guide corresponding to the kth node of the M nodes. The frequency channel signal receives power, and k is a positive integer not greater than M;

When the PO _k is the first type of power parameter, the PO _{k is} proportional to the target signal to interference and noise ratio, the interference noise of the kth node, and the transmission power of the pilot channel;

When the PO _k is the second type power parameter, the PO _{1 is} proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the first node, and the pilot channel transmission power; PO _k and the first node The interference noise is proportional to the pilot channel transmit power, and PO _k is inversely proportional to the interference noise of the kth node and the pilot channel transmit power, where k is a positive integer greater than 1, and not greater than M.

Method 2:

When the uplink receiving indication is the uplink maximum ratio combining MRC receiving mode, and the power parameter is the first type power parameter, determining the initial transmit power value of the uplink control channel according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, and PO ₁ , PO _{2 ,} . . . , PO _M respectively represent a first type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P _{dr , 1} P _dr,2 ......P _dr,M respectively represent the pilot channel signal received power of the first node to the Mth node of the above M nodes, wherein the first type of power parameter corresponding to any node is combined with the above The target signal to interference and noise ratio of the cell, the interference noise of the node, and the transmit power of the pilot channel signal are all proportional.

Method three:

The foregoing UE receives the uplink maximum ratio combining MRC receiving mode in the uplink receiving indication, and when the power parameter is the second type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, and PO ₁ , PO _{2 ,} . . . , PO _M respectively represent a second type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P _{dr , 1} P _dr,2 ......P _dr,M respectively indicate pilot channel signal received power of the first node to the Mth node among the M nodes, wherein the first node of the M nodes corresponds to the second The power parameter of the class is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the transmit power of the pilot channel signal; the second type of power parameter of the kth node of the M nodes, and the foregoing The interference noise of the first point is proportional to the transmit power of the pilot channel signal, and is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel signal, where k is greater than 1, and is not greater than M. A positive integer.

There are multiple pilot channels between the UE and multiple nodes. These pilot channels use the same scrambling code and different channelization codes, which can be used to distinguish each node. In practical applications, the pilot channel can be, but is not limited to, a Common Pilot Channel (CPICH).

The initial transmit power of the uplink control channel is used as the power reference of the uplink channel of the UE, and can be used for uplink open loop power control. In practical applications, the uplink control channel can be, but is not limited to, a DPCCH.

For example, referring to FIG. 4, it is assumed that there are two nodes in the joint cell, namely HPN and LPN. It is assumed that different nodes transmit signals through different CPICHs. The signal transmitted by HPN through CPICH is CPICH1, its transmit power is P _dt1 , the signal transmitted by LPN through CPICH is CPICH2, its transmit power is P _dt2 , and the path gain from UE to HPN is PL. _1. The path gain of the UE to the LPN is PL ₂ , assuming that the path gain from the UE to the node is approximately equal to the path gain from the node to the UE. CPICH1 UE reception power of the received transmission is HPN P _dr1, CPICH2 reception power transmission is received LPN P _dr2.

P _dr1 =P _dt1 *PL ₁

P _dr2 =P _dt2 *PL ₂

It is assumed that the initial transmit power of the uplink control channel determined by the UE is P _u , the interference noise of the HPN receiving the uplink control channel is N ₁ , and the interference noise of the LPN receiving the uplink control channel is N ₂ . In the uplink MRC receiving mode, the node receives the target SINR of the uplink control channel sent by the UE as SINR _target .

(1) When the first information sent by the joint cell carries the two power parameters corresponding to the LPN and the HPN as the first type of power parameters, the following two situations can be classified according to different uplink receiving modes:

Case 1: The uplink receiving indication of the joint cell carried in the first information is an uplink MRC receiving mode, which can satisfy the diversity gain requirement of the node receiving the uplink control channel.

In the uplink MRC receiving mode, the SINR _target needs to satisfy the following formula:

The above formula combined with the formula

Can be transformed into:

Where PO ₁ = SINR _target * N ₁ * P _{dt, 1} represents the first type of power parameter of the HPN, PO ₂ = SINR _target * N ₂ * P _{dt, and 2} represents the first type of power parameter of the LPN.

Similar to the above process, if the node in the joint cell that receives the uplink control channel transmitted by the UE is M nodes, the initial transmit power P _u of the uplink control channel determined by the UE should be:

The first type of power parameter PO _i = SINR _target * N _i * P _{dt, i} , i = 1, 2, ..., M.

Case 2: The uplink receiving indication of the node carried in the first information is an uplink selective receiving mode.

In the uplink selective reception mode, the SINR _target needs to satisfy the following formula:

The kth node represents one of the HPN and the LPN. When k=1, the kth node represents the HPN, and when k=2, the kth node represents the LPN.

It can be concluded from P _dr1 =P _dt1 *PL ₁ and P _dr2 =P _dt2 *PL ₂ , P _dr,k =P _dt,k *PL _k ,P _dt,k represents the emission of the CPICH signal transmitted by the kth node The power, P _dr,k indicates that the UE receives the received power of the CPICH signal transmitted by the kth node, and PL _k represents the path gain of the UE to the kth node.

The above formula, combined with P _dr,k =P _dt,k *PL _k , can be transformed into:

Wherein, PO _k = SINR _target * N _k * P _{dt, k} , N _k represents the interference noise of the kth node receiving the uplink control channel, and P _{dt, k} represents the transmission power of the pilot channel transmitted by the kth node.

For example, suppose

The value is

with

The largest value, then, the kth node is HPN.

Similar to the above process, if the nodes in the joint cell that receive the uplink control channel transmitted by the UE are M nodes, then the SINR _target needs to satisfy the following formula:

Hypothesis

The value is

Among the largest values, that is, among the first node to the Mth node, the kth node has the largest signal-to-noise ratio, and the signal-to-noise ratio of the kth node can be used as the target signal dry noise. Ratio, ie

At this time, the initial transmit power P _u of the uplink control channel determined by the UE should be:

Wherein, PO _k =SINR _target *N _k *P _dt,k , N _k represents the interference noise of the kth node receiving the uplink control channel, and P _dt,k represents the transmission power of the CPICH signal transmitted by the kth node.

(2) When the first information sent by the joint cell carries the two power parameters corresponding to the LPN and the HPN as the second type of power parameters, the following two situations can be classified according to different uplink receiving modes:

Case 1: The uplink receiving indication of the joint cell carried in the first information is an uplink MRC receiving mode, which can satisfy the hierarchical gain requirement of the node receiving the uplink control channel.

The above formula combined with the formula

After deformation, you can get:

Where PO ₁ =SINR _target *N ₁ *P _dt1 represents the second type of power parameter of the HPN,

Indicates the second type of power parameter for the LPN.

_{_{Wherein, P dr1, P dr2 ...... P}} drM respectively UE reception power received pilot channel M nodes in each node of the _{_{transmission, PO 1 = SINR target * N}} 1 * P dt1,

i=2,3,...,M.

Case 2: The uplink receiving indication of the joint cell carried in the first information is an uplink selective receiving mode, and the complexity of this method is low.

A second type of power parameter representing LPN, N _k represents the interference noise of the kth node receiving the uplink control channel, and P _dt,k represents the transmission power of the CPICH signal transmitted by the kth node.

For example, suppose

The value is

with

The largest value among them, then the kth node is the LPN.

Where PO ₁ = SINR _target *N ₁ *P _dt1 ,

i=2,...,M.

The second type of power parameter of the first node is proportional to the target signal to interference and noise ratio, the interference noise of the node receiving the uplink control channel, and the transmit power of the CPICH signal transmitted by the node; and the second type of power of the i th node, The first node receives the interference noise of the uplink control channel and the transmit power of the CPICH signal transmitted by the first node is proportional, and the interference noise of the ith node receiving the uplink control channel and the transmit power of the ith node transmitting the CPICH signal are both In inverse proportion, where i is a positive integer not greater than M.

It can be seen that the uplink selection receiving mode is less complicated than the uplink MRC receiving mode. In practical applications, an appropriate uplink selection receiving mode can be selected according to specific conditions.

Based on the same design, the embodiment of the present invention further provides an information sending method. Referring to FIG. 5, the method includes the following steps:

Step 501: The first information carries the uplink receiving indication of the joint cell, and the M power parameters corresponding to the M nodes in the joint cell, where the power parameter of any node is based on the joint cell target signal to interference and noise ratio. Determined by the interference noise of the node and the transmit power of the pilot channel, where M is a positive integer greater than one;

Step 502: Send the first information to the user equipment UE, so that the UE determines the initial transmit power of the uplink control channel by using the M power parameters according to the uplink receiving indication.

Preferably, the uplink receiving indication includes an uplink selective receiving mode or an uplink maximum ratio combining MRC receiving mode.

The M power parameters corresponding to the M nodes may include M first type power parameters or M second type power parameters.

The first type of power parameter corresponding to any node is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power.

The second type of power parameter corresponding to the first node of the M nodes is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power; among the M nodes. The second type of power parameter of the kth node is proportional to the interference noise of the first point and the transmit power of the pilot channel, and is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel. Where k is a positive integer greater than 1, and not greater than M.

There are multiple pilot channels between the UE and multiple nodes. These pilot channels use the same scrambling code and different channelization codes, which can be used to distinguish each node. In practical applications, the pilot channel can be, but is not limited to, CPICH.

Based on the same design, the embodiment of the present invention further provides an apparatus for determining initial transmit power. Referring to FIG. 6, the apparatus includes:

The receiving module 601 is configured to receive the first information sent by the joint cell, where the uplink receiving indication is used to indicate an uplink receiving manner of the joint cell, and the M power parameters are respectively corresponding to the M nodes in the joint cell. M is a positive integer greater than 1, and the power parameter corresponding to any node is determined according to the target signal to interference and noise ratio in the joint cell and the interference noise and pilot channel transmission power of the node;

The obtaining module 602 is configured to obtain the received power of the M pilot channels between the M and the M nodes, where the M pilot channels receive power, wherein the M pilot channels use the same Scrambling code and different channelization codes;

The determining module 603 is configured to determine, according to the uplink receiving indication, the initial transmit power of the uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels.

Preferably, the determining module 603 is specifically configured to:

When the uplink receiving indication is the uplink selective receiving mode, the initial transmit power value of the uplink control channel is determined according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, PO _k represents a power parameter corresponding to a kth node of the M nodes, and P _dr,k represents a guide corresponding to the kth node of the M nodes. The frequency channel receives power, and k is a positive integer not greater than M;

When the PO _k is the first type of power parameter, the PO _{k is} proportional to the target signal to interference and noise ratio, the interference noise of the kth node, and the pilot channel transmission power; or

Preferably, the determining module 603 is specifically configured to:

Wherein, P _u represents an initial transmit power value of the uplink control channel, and PO ₁ , PO _{2 ,} . . . , PO _M respectively represent a first type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P _{dr , 1} P _dr,2 ......P _dr,M respectively represent the pilot channel received power of the first node to the Mth node among the M nodes, wherein the first type of power parameter corresponding to any node, and the joint cell The target signal to interference and noise ratio, the interference noise of the node and the pilot channel transmission power are proportional.

Preferably, the determining module 603 is specifically configured to:

When the uplink receiving indication is the uplink maximum ratio combining MRC receiving mode, and the power parameter is the second type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P _u represents an initial transmit power value of the uplink control channel, and PO ₁ , PO _{2 ,} . . . , PO _M respectively represent a second type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P _{dr , 1} P _dr,2 ......P _dr,M respectively represent the pilot channel received power of the first node to the Mth node among the M nodes, wherein the first node corresponding to the first node of the M nodes The power parameter is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power; the second type power parameter of the kth node of the M nodes, and the first type The interference noise of each point is proportional to the transmit power of the pilot channel, and is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel, where k is a positive integer greater than 1, and not greater than M.

The above devices are in one-to-one correspondence with the method flow, and are not described herein again.

Based on the same design, the embodiment of the present invention is further provided to a user equipment. Referring to FIG. 7, the user equipment includes a transceiver 701, a processor 702, a memory 703, and a bus 704. The transceiver 701, the processor 702, and the memory 703 are connected by a bus 704 and complete communication with each other, wherein:

The bus 704 can be an Industry Standard Architecture (ISA) bus, a Peripheral Component (PCI) bus, or an extended industry standard architecture. (Extended Industry Standard Architecture, EISA) bus, etc. The bus 704 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one line is shown in Figure 7, but it does not mean that there is only one bus or one type of bus.

The memory 703 is for storing program code, and the program code includes an operation instruction. The memory 703 may include a random access memory (RAM), and may also include a non-volatile memory such as a disk storage.

The processor 702 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

The transceiver 701 can be an antenna.

The transceiver 701 is configured to receive the first information sent by the joint cell, where the first information carries an uplink receiving indication and an M power parameter, where the uplink receiving indication is used to indicate an uplink receiving manner of the joint cell. The M power parameters are respectively corresponding to the M nodes in the joint cell, and M is a positive integer greater than 1. The power parameter corresponding to any node is based on the target signal to interference and noise ratio of the joint cell and the interference of the node. The noise and the transmit power of the pilot channel are determined;

The processor 702 is configured to invoke the program code in the memory 703 to perform the following operations:

Acquiring the received power of the M pilot channels between the user equipment and the M nodes, where the M pilot channels use the same scrambling code and different channelization codes;

And determining, according to the uplink receiving indication, the initial transmit power of the uplink control channel of the user equipment by using the M power parameters and the received power of the M pilot channels, where M is a positive integer greater than 1.

Preferably, the processor 702 is specifically configured to:

When the uplink receiving indication is the uplink selective receiving mode, the initial transmit power value of the uplink control channel is calculated according to the following formula:

The M power parameters corresponding to the M nodes respectively include M first type power parameters, wherein the first type power parameter corresponding to any node, the target signal to interference and noise ratio of the joint cell, and the interference noise of the node And pilot The channel transmit power is proportional to each other; or,

The M power parameters corresponding to the M nodes respectively include M second type power parameters, wherein the second type power parameter corresponding to the first node of the M nodes and the target signal dry noise of the joint cell Ratio, the interference noise of the node and the pilot channel transmission power are both proportional; the second type power parameter of the kth node of the above M nodes, and the interference noise and pilot channel transmission power of the first point are both In proportion, it is inversely proportional to the interference noise of the kth node and the pilot channel transmission power, where k is a positive integer greater than 1, and not greater than M.

Preferably, the processor 702 is specifically configured to:

Preferably, the processor 702 is specifically configured to:

Based on the same design concept, an embodiment of the present invention also designs an information sending system, as shown in FIG. The information transmission system includes M nodes and a central scheduler, wherein:

The central scheduler carries the uplink receiving indication of the joint cell in the first information, and the M power parameters corresponding to the M nodes in the joint cell, where the power parameter of any node is based on the joint cell target Determined by the noise ratio, the interference noise of the node, and the transmit power of the pilot channel, M is a positive integer greater than one;

The M nodes send the first information to the user equipment UE according to the indication of the central scheduler, so that the UE determines the initial transmit power of the uplink control channel by using the M power parameters according to the uplink receiving indication.

In practical applications, the above M nodes may include HPN or/and LPN.

Each of the M nodes corresponding to the M power parameters includes M first type power parameters or M second type parameters.

The initial transmit power of the uplink control channel determined in the embodiment of the present invention can satisfy the target SINR of the uplink control channel while compensating for the path loss of the joint cell to the UE, and can not only ensure the quality of the uplink control channel received by the node. At the same time, it avoids interference to the uplink control channel of other UEs, and can also avoid excessively configuring the transmit power of the uplink control channel, thereby avoiding waste of uplink control channel transmit power and saving UE energy.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It should be understood that each of the flowcharts and/or block diagrams can be implemented by computer program instructions. A process and/or block, and a combination of the processes and/or blocks in the flowcharts and/or block diagrams. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although the preferred embodiment of the invention has been described, it will be apparent to those skilled in the < Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various modifications and variations to the embodiments of the invention without departing from the spirit and scope of the embodiments of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the embodiments of the invention.

Claims

A method for determining an initial transmit power, comprising:

The user equipment UE receives the first information sent by the joint cell, where the first information carries an uplink receiving indication and an M power parameter, where the uplink receiving indication is used to indicate an uplink receiving manner of the joint cell, The M power parameters are respectively corresponding to the M nodes in the joint cell, and M is a positive integer greater than 1. The power parameter corresponding to any node is based on the target signal to interference and noise ratio of the joint cell and the node. The interference noise and the transmit power of the pilot channel are determined;

Obtaining, by the UE, the received power of the M pilot channels between the UE and the M nodes, where the M pilot channels use the same scrambling code and different channelization codes;

And determining, by the UE, the initial transmit power of the uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels according to the uplink receiving indication.
The method according to claim 1, wherein the UE determines an uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels according to the uplink receiving indication. Initial transmit power, including:

When the uplink receiving mode indicated by the uplink receiving indication is an uplink selective receiving combined receiving mode, the UE determines the initial transmit power according to the following formula:

Wherein P u represents the initial transmit power, PO k represents a power parameter corresponding to the kth node of the M nodes, and P dr,k represents a pilot corresponding to the kth node of the M nodes Receive power of the channel;

When the PO k is a first type of power parameter, the PO k is proportional to the target signal to interference and noise ratio, the interference noise of the kth node, and the transmission power of the pilot channel;

When the PO k is a second type of power parameter, the PO 1 is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the first node, and the pilot channel transmission power; PO k and the first The interference noise of one node is proportional to the transmit power of the pilot channel, and PO k is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel, where k is greater than 1, and is not greater than M. A positive integer.
The method according to claim 1, wherein the UE determines an uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels according to the uplink receiving indication. The initial transmit power, including:

When the uplink reception indication is the uplink maximum ratio combining MRC receiving mode, and the power parameter is the first type power parameter, the initial transmission power value of the uplink control channel is configured according to the following formula:

Wherein, P u represents an initial transmit power value of the uplink control channel, and PO 1 , PO 2 , . . . , PO M respectively represent a first type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P dr , 1 P dr, 2 ... P dr, M respectively represent the pilot channel received power of the first node to the Mth node of the M nodes, wherein the first type of power parameter corresponding to any node, The target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power are all proportional.
The method according to claim 1, wherein the UE calculates an initial transmit power value by using the M power parameters and the M different pilot channel received powers according to the uplink receiving indication, and The initial transmit power is determined as the initial transmit power of the uplink control channel of the UE, and specifically includes:

The UE receives, in the uplink, an uplink maximum ratio combining MRC receiving mode, and when the power parameter is a second type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P u represents an initial transmit power value of the uplink control channel, and PO 1 , PO 2 , . . . , PO M respectively represent a second type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P dr , 1 P dr, 2 . . . P dr, M respectively represent pilot channel received power of the first node to the Mth node of the M nodes, wherein the first node of the M nodes corresponds to The second type of power parameter is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power; and the second type of power parameter of the kth node of the M nodes And the interference noise of the first point is proportional to the transmit power of the pilot channel, and is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel, where k is greater than 1, and not A positive integer greater than M.
The method according to any one of claims 1 to 4, wherein the pilot channel is a common pilot channel CPICH, and the uplink control channel is a dedicated physical control channel DPCCH.
A method for transmitting information, comprising:

Carrying, in the first information, an uplink receiving indication of the joint cell, and M power parameters corresponding to the M nodes in the joint cell, where the power parameter of any node is according to the joint cell target signal to interference and noise ratio, Determined by the interference noise of the node and the transmit power of the pilot channel, M is a positive integer greater than one;

And transmitting, by the user equipment, the first information, to enable the UE to determine an initial transmit power of the uplink control channel by using the M power parameters according to the uplink receiving indication.
The method according to claim 6, wherein the uplink reception indication comprises an uplink selection reception mode or an uplink maximum ratio combining MRC reception mode.
The method of claim 6 wherein:

The M power parameters corresponding to the M nodes, including the M first type power parameters, where the first type of power parameter corresponding to any node, the target signal to interference and noise ratio of the joint cell, and the node Both the interference noise and the pilot channel transmit power are proportional;

The M power parameters corresponding to the M nodes respectively include M second type power parameters, wherein the second type power parameter corresponding to the first node of the M nodes and the target of the joint cell The signal to interference and noise ratio, the interference noise of the node, and the pilot channel transmission power are all proportional; the second type of power parameter of the kth node of the M nodes, and the interference noise and the guide of the first point The frequency channel transmit power is proportional to each other, and is inversely proportional to the interference noise of the kth node and the pilot channel transmit power, where k is a positive integer greater than 1, and not greater than M.
The method according to any one of claims 6-8, wherein the pilot channel is a common pilot channel CPICH, and the uplink control channel is a dedicated physical control channel DPCCH.
A user equipment, comprising:

a receiving module, configured to receive first information sent by the joint cell, where the uplink receiving indication is used to indicate an uplink receiving manner of the joint cell, where the M power parameters are respectively associated with M nodes in the joint cell One-to-one correspondence, M is a positive integer greater than 1, and the power parameter corresponding to any node is determined according to the target signal to interference and noise ratio in the joint cell and the interference noise of the node and the pilot channel transmission power;

An acquiring module, configured to acquire received power of M pilot channels between the UE and the M nodes, where the received power of the M pilot channels, where the M pilot channels are Adopt the same scrambling code and different channelization codes;

And a determining module, configured to determine, according to the uplink receiving indication, the initial transmit power of the uplink control channel of the UE by using the M power parameters and the received power of the M pilot channels.
The device according to claim 10, wherein the determining module is specifically configured to:

When the uplink reception indication is the uplink selection reception mode, the initial transmission power value of the uplink control channel is determined according to the following formula:

Wherein, P u represents an initial transmit power value of the uplink control channel, PO k represents a power parameter corresponding to a kth node of the M nodes, and P dr,k represents a kth node corresponding to the M nodes. The pilot channel receives power, and k is a positive integer not greater than M;

When the PO k is a first type of power parameter, the PO k is proportional to the target signal to interference and noise ratio, the interference noise of the kth node, and the pilot channel transmission power; or

When the PO k is a second type of power parameter, the PO 1 is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the first node, and the pilot channel transmission power; PO k and the first The interference noise of one node is proportional to the transmit power of the pilot channel, and PO k is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel, where k is greater than 1, and is not greater than M. A positive integer.
The device according to claim 10, wherein the determining module is specifically configured to:

When the uplink receiving indication is an uplink maximum ratio combining MRC receiving mode, and the power parameter is a first type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P u represents an initial transmit power value of the uplink control channel, and PO 1 , PO 2 , . . . , PO M respectively represent a first type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P dr , 1 P dr, 2 ... P dr, M respectively represent the pilot channel received power of the first node to the Mth node of the M nodes, wherein the first type of power parameter corresponding to any node, The target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power are all proportional.
The device according to claim 10, wherein the determining module is specifically configured to:

When the uplink receiving indication is an uplink maximum ratio combining MRC receiving mode, and the power parameter is a second type power parameter, determining an initial transmit power value of the uplink control channel according to the following formula:

Wherein, P u represents an initial transmit power value of the uplink control channel, and PO 1 , PO 2 , . . . , PO M respectively represent a second type of power parameter corresponding to each of the first node to the Mth node of the M nodes, P dr , 1 P dr, 2 . . . P dr, M respectively represent pilot channel received power of the first node to the Mth node of the M nodes, wherein the first node of the M nodes corresponds to The second type of power parameter is proportional to the target signal to interference and noise ratio of the joint cell, the interference noise of the node, and the pilot channel transmission power; and the second type of power parameter of the kth node of the M nodes And the interference noise of the first point is proportional to the transmit power of the pilot channel, and is inversely proportional to the interference noise of the kth node and the transmit power of the pilot channel, where k is greater than 1, and not A positive integer greater than M.
The apparatus according to any one of claims 10-13, wherein the pilot channel is a common pilot channel CPICH, and the uplink control channel is a dedicated physical control channel DPCCH.
An information sending system, comprising: M nodes and a central scheduler, wherein:

The central scheduler carries, in the first information, an uplink receiving indication of the joint cell, and M power parameters corresponding to each of the M nodes in the joint cell, where a power parameter of any node is according to the joint Determined by the cell target signal to interference and noise ratio, the interference noise of the node, and the transmit power of the pilot channel, where M is a positive integer greater than one;

The M nodes send the first information to the user equipment UE according to the indication of the central scheduler, so that the UE determines the initial of the uplink control channel by using the M power parameters according to the uplink receiving indication. Transmit power.
The system according to claim 15, wherein the uplink reception indication comprises an uplink selection reception mode or an uplink maximum ratio combining MRC reception mode.
The system according to claim 15, wherein the uplink reception indication comprises an uplink selection reception mode or an uplink maximum ratio combining MRC reception mode;

The M power parameters corresponding to the M nodes, including the M first type power parameters, where the first type of power parameter corresponding to any node, the target signal to interference and noise ratio of the joint cell, and the node Both the interference noise and the pilot channel transmit power are proportional;

The M power parameters corresponding to the M nodes respectively include M second type power parameters, wherein the second type power parameter corresponding to the first node of the M nodes and the target of the joint cell The signal to interference and noise ratio, the interference noise of the node, and the pilot channel transmission power are all proportional; the second type of power parameter of the kth node of the M nodes, and the interference noise and the guide of the first point The frequency channel transmit power is proportional to each other, and is inversely proportional to the interference noise of the kth node and the pilot channel transmit power, where k is a positive integer greater than 1, and not greater than M.
The system according to any one of claims 15-17, wherein the pilot channel is a common pilot channel CPICH, and the uplink control channel is a dedicated physical control channel DPCCH.