WO2012146073A1

WO2012146073A1 - Method and apparatus for transmitting sounding reference signals

Info

Publication number: WO2012146073A1
Application number: PCT/CN2012/071188
Authority: WO
Inventors: 任璐; 戴博; 喻斌; 林志嵘
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-04-26
Filing date: 2012-02-16
Publication date: 2012-11-01
Also published as: CN102761969A

Abstract

Disclosed is a method and apparatus for transmitting sounding reference signals, applied to an advanced long term evolution system, and comprising: when sending to a network side sounding reference signals of multiple component carriers, judging whether the total transmit power of the sounding reference signals of the multiple component carriers is greater than the maximum transmit power of a terminal, and if yes, determining sounding reference signals to be sent to the network side from the sounding reference signals of the multiple component carriers, the total transmit power of the sounding reference signals to be sent to the network side being smaller than or equal to the maximum transmit power of the terminal. The present invention can achieve normal transmission of sounding reference signals on component carriers when the total transmit power of sounding reference signals on multiple component carriers exceeds the maximum transmit power of the terminal.

Description

Method and device for transmitting measurement reference signal

Technical field

The present invention relates to an advanced long term evolution system, and more particularly to a method and apparatus for transmitting a measurement reference signal.

Background technique

The uplink physical channel of the Long Term Evolution (LTE) system includes a Physical Random Access Channel (PARCH), a Physical Uplink Shared Channel (PUSCH), and a Physical Uplink Control Channel ( Physical Uplink Control Channel, referred to as PUCCH). LTE uplinks use Orthogonal Frequency Division Multiplexing (OFDM) technology, where reference signals and data are multiplexed by time division multiplexing (TDM).

The uplink reference signal is divided into a Demodulation Reference Signal (DMRS) and a Sounding Reference Signal (SRS). The DMRS is divided into a PUCCH demodulation reference signal and a PUSCH demodulation reference signal, respectively. Used in different channel transmissions. The DMRS is mainly used for the estimation of the uplink channel and the coherent detection and demodulation of the base station (referred to as eNB). The SRS is mainly used for the measurement of the uplink channel, which is convenient for the eNB to perform frequency selective scheduling. In order to support such frequency selective scheduling, a terminal (referred to as UE) needs to measure a large bandwidth, which usually exceeds the bandwidth of data transmission, so SRS is a "wideband" reference signal.

LTE specifies that the SRS is transmitted on the last symbol in the subframe. In order to avoid mutual interference between the SRS and PUSCH data between different users, LTE specifies that the last symbol of the corresponding subframe cannot be used by any UE to transmit PUSCH data. In general, such a rule guarantees that PUCCH and SRS do not conflict with each other. If there is an SRS and a PUCCH transmitted simultaneously, the SRS is dropped to maintain the single carrier characteristic of the uplink. However, when the PUCCH is configured with a truncated format, the last symbol of the sub-frame can be used to transmit the SRS.

In order to meet the requirements of the International Telecommunication Union-Advanced (ITU-Advanced), as the evolution standard of LTE Long Term Evolution Advanced (LTE-A) systems need to support larger system bandwidths (up to 100MHz) and require backward compatibility with existing LTE standards. Based on the existing LTE system, the bandwidth of the LTE system can be combined to obtain a larger bandwidth. This technology is called Carrier Aggregation (CA) technology, which can improve the IMT-Advance system. The spectrum utilization, mitigation of spectrum resources shortage, and optimize the utilization of spectrum resources.

In a system in which carrier aggregation is introduced, a carrier to be aggregated is called a component carrier (CC), which is also called a cell (Cell). At the same time, the concept of the primary component carrier/cell (PCC/PCell) and the secondary component carrier/cell (SCC/SCell) is also proposed. The main component carrier and the at least one secondary component carrier are included, wherein the primary component carrier is always in an active state.

In the LTE-A system, in addition to retaining the original periodic SRS of the LTE, in order to improve the utilization of the SRS resources and improve the flexibility of resource scheduling, the UE may also be configured to send the aperiodic by using downlink control information or higher layer signaling. (aperiodic) SRS.

Summary of the invention

An object of the present invention is to provide a method and a device for transmitting a measurement reference signal, which can realize a measurement reference signal on a component carrier when a total transmission power of a measurement reference signal on a plurality of component carriers exceeds a maximum transmission power of the terminal. Send normally.

In order to solve the above technical problem, the present invention provides a method for transmitting a measurement reference signal, which is applied to an advanced long term evolution system, including:

When transmitting the measurement reference signals of the multiple component carriers to the network side, determining whether the total transmit power of the measurement reference signals of the multiple component carriers is greater than the maximum transmit power of the terminal, and if greater than, from the multiple component carriers The measurement reference signal to be transmitted to the network side is determined in the measurement reference signal, and the total transmission power of the measurement reference signal to be transmitted to the network side is less than or equal to the maximum transmission power of the terminal.

The above methods also include: Prior to determining the measurement reference signal to be transmitted to the network side, prioritizing the measurement reference signals of the plurality of component carriers;

Determining the measurement reference signal to be sent to the network side includes: determining, according to a priority ordering of the measurement reference signals of the multiple component carriers, from the measurement reference signals of the multiple component carriers Measurement reference signal on the network side.

The step of determining the measurement reference signal to be transmitted to the network side according to the priority ordering of the measurement reference signals of the plurality of component carriers includes:

Determining, according to the priority ordering of the measurement reference signals of the multiple component carriers, removing the measurement reference signal with the lowest priority, and determining whether the total transmission power of the remaining measurement reference signals is greater than the maximum transmit power of the terminal, if greater than, And removing the measurement reference signal with the lowest priority again, and performing the determining operation until the total transmission power of the remaining measurement reference signals is less than or equal to the maximum transmission power of the terminal, determining the remaining measurement reference signals as the a measurement reference signal sent to the network side; or,

And determining, according to the priority ordering of the measurement reference signals of the plurality of component carriers, the measurement reference signal with the highest priority as the measurement reference signal to be sent to the network side.

The step of prioritizing the measurement reference signals of the plurality of component carriers includes: classifying the measurement reference signals of the plurality of component carriers according to the aperiodic measurement reference signal and the periodic measurement reference signal, determining the non- The priority of the periodic measurement reference signal is higher than the priority of the measurement reference signal of the period.

The step of prioritizing the measurement reference signals of the plurality of component carriers further includes: prioritizing the same type of measurement reference signals in one of the following manners: Method 1: determining the order according to the bandwidth from small to large. The priority of the measurement reference signal of the corresponding component carrier is from low to high;

Manner 2: determining, according to the period from long to short, the priority of the measurement reference signal of the corresponding component carrier is from low to high;

Manner 3: First, according to the order of the bandwidth from small to large, the priority of the measurement reference signal of the corresponding component carrier is determined from low to high, and the measurement reference signal of multiple component carriers with equal bandwidth is further shortened according to the period. The order determines the priority of the corresponding measurement reference signal from low to high. The step of prioritizing the measurement reference signals of the plurality of component carriers further includes: determining that the measurement reference signal of the primary component carrier has a higher priority than the secondary component carrier when the priority of the measurement reference signals of the component carriers is the same The priority of the measurement reference signal;

When the priorities of the measurement reference signals having the secondary component carriers are the same, determining the priority of the corresponding measurement reference signals from high to low according to the index of the secondary component carriers from low to high; or configuring according to high layer signaling The priority of the secondary component carrier determines the priority of the corresponding measurement reference signal.

The step of prioritizing the measurement reference signals of the multiple component carriers further includes: when the priority of the measurement reference signals of the component carriers are the same, determining corresponding ones according to an index of the component carriers from low to high The priority of the measurement reference signal is from high to low; or the priority of the corresponding measurement reference signal is determined according to the priority of the component carrier configured by the high layer signaling.

The step of prioritizing the measurement reference signals of the plurality of component carriers further includes: determining, for the same type of measurement reference signals, a priority of the measurement reference signal of the primary component carrier is higher than a priority of the measurement reference signal of the secondary component carrier And, for the measurement reference signal of the same type of secondary component carrier, determining that the measurement reference signal of the secondary component carrier having the physical uplink shared channel transmission has a higher priority than the measurement reference signal of the secondary component carrier without the uplink shared channel transmission priority.

The step of prioritizing the measurement reference signals of the multiple component carriers further includes: determining, when the priorities of the measurement reference signals having the secondary component carriers are the same, determining the order of the secondary component carriers from low to high The priority of the corresponding measurement reference signal is from high to low; or the priority of the secondary component carrier configured according to the high layer signaling is determined from high to low, and the priority of the corresponding measurement reference signal is determined from high to low. .

The step of prioritizing the measurement reference signals of the plurality of component carriers includes: determining that a priority of the measurement reference signal of the primary component carrier is higher than a priority of the measurement reference signal of the secondary component carrier;

And classifying the measurement reference signal of the secondary component carrier according to the aperiodic measurement reference signal and the periodic measurement reference signal, determining that the aperiodic measurement reference signal has a higher priority than the The priority of the periodic measurement reference signal;

For measurement reference signals of the same type of secondary component carrier, it is determined that the priority of the measurement reference signal having the secondary component carrier of the physical uplink shared channel transmission is higher than the priority of the measurement reference signal of the secondary component carrier without the uplink shared channel transmission.

The method further includes: if the total transmit power of the measurement reference signals of the plurality of component carriers is less than or equal to the maximum transmit power of the terminal, transmitting the measurement reference signals of the plurality of component carriers to the network side.

In addition, the present invention further provides a transmitting apparatus for measuring a reference signal, which is applied to an advanced long term evolution system, including: a power determining unit, a signal determining unit, and a signal sending unit, wherein: the power determining unit is configured to: When the network side sends the measurement reference signals of the multiple component carriers, it is determined whether the total transmission power of the measurement reference signals of the multiple component carriers is greater than the maximum transmit power of the terminal;

The signal determining unit is configured to: when the power determining unit determines that a total transmit power of the measurement reference signal of the multiple component carriers is greater than a maximum transmit power of the terminal, a measurement reference signal from the multiple component carriers Determining, in the measurement reference signal to be sent to the network side, the total transmission power of the measurement reference signal to be sent to the network side is less than or equal to the maximum transmission power of the terminal;

The signal transmitting unit is configured to transmit the measurement reference signal to be transmitted to the network side determined by the signal determining unit to the network side.

The above apparatus further includes a prioritization unit, wherein:

The priority ordering unit is configured to: when the power determining unit determines that the total transmission power of the measurement reference signal of the multiple component carriers is greater than the maximum transmission power of the terminal, the measurement reference of the multiple component carriers Signal prioritization; The signal determining unit is configured to prioritize the measurement reference signals of the plurality of component carriers according to the priority sorting unit, and determine, to be sent from the measurement reference signals of the plurality of component carriers Measurement reference signal on the network side.

The signal determining unit is configured to determine the measurement reference signal to be transmitted to the network side by:

Determining, according to the priority ordering of the measurement reference signals of the multiple component carriers, removing the measurement reference signal with the lowest priority, and determining whether the total transmission power of the remaining measurement reference signals is greater than the maximum transmit power of the terminal, if greater than, Deleting the measurement reference signal with the lowest priority again, and performing the determining operation until the total transmission power of the remaining measurement reference signals is not greater than the maximum transmission power of the terminal, determining the remaining measurement reference signals as the to-be-sent Measurement reference signal to the network side; or,

And determining, according to the priority ordering of the measurement reference signals of the plurality of component carriers, the measurement reference signal having the highest priority as the measurement reference signal to be transmitted to the network side.

In summary, the present invention prioritizes measurement reference signals on respective component carriers, removes measurement reference signals on one or more component carriers with lower priority, and reduces total transmission power to solve multiple component carriers. When the measurement reference signal is transmitted at the same time, the problem that the total transmission power exceeds the maximum transmission power of the terminal cannot be normally transmitted, the effective scheduling of the base station is ensured, and the transmission performance of the measurement reference signal is improved. BRIEF abstract

1 is a flow chart of prioritizing measurement reference signals in a transmission method according to the present invention;

2 is a schematic diagram of a first scenario of transmitting multiple SRSs in an example of the present invention;

3 is a schematic diagram of a second scenario of transmitting multiple SRSs in an example of the present invention;

4 is a schematic diagram of a third scenario of transmitting multiple SRSs in an example of the present invention;

FIG. 5 is a structural diagram of a transmitting apparatus for measuring a reference signal according to an embodiment of the present invention. Preferred embodiment of the invention In view of the concept of carrier aggregation introduced in the LTE-A system, when the eNB schedules multiple CCs for the UE, the SRS needs to be sent on each CC, which may cause the UE to feed back SRSs of multiple CCs at the same time. When multiple SRSs are transmitted at the same time, there is a case where the total transmission power of the SRS exceeds the maximum transmission power of the UE, which causes the UE to perform power reduction on multiple SRSs.

Based on the above considerations, in the embodiment of the present invention, in the case of carrier aggregation scenarios in LTE-A, it is required to simultaneously transmit SRSs on multiple CCs and one component carrier corresponds to one measurement reference signal, and the total power transmitted by the SRS exceeds the maximum transmit power of the UE. In this case, power reduction is considered to ensure the transmission performance of multiple SRSs, and the scheduling accuracy and effectiveness of the eNB for the UE are ensured. The embodiment provides that in the scenario where the UE power is limited, the measurement reference signal to be sent to the network side is determined from the measurement reference signals of the multiple component carriers, and the total transmission power of the measurement reference signal to be sent to the network side needs to be ensured. It is less than or equal to the maximum transmit power of the terminal. For example, the SRS on multiple CCs that are simultaneously transmitted can be power-reduced according to the priority of the SRS on each CC to ensure the transmission performance of the SRS on multiple CCs.

The power reduction method in this embodiment includes:

Manner 1: When the SRSs on n ( n > 1 ) CCs need to be transmitted simultaneously, if the total transmit power of the SRS exceeds the maximum transmit power of the UE, the SRSs on each CC are in descending order of priority. Sorting, removing the SRS with the lowest priority one by one, and determining whether the total transmit power of the remaining SRS exceeds the maximum transmit power of the UE, and the total transmit power of the SRS on the remaining m CCs is less than or equal to the maximum transmit power of the UE. The SRSs on the remaining m CCs are determined as SRSs to be sent to the network side, and the SRSs on the remaining m CCs are transmitted. At this time, the total transmission power of the first m+1 high priority SRSs is greater than that of the UE. Maximum transmit power.

The above n is the number of CCs that have SRS transmission, that is, the number of SRSs to be transmitted, and m is the number of SRSs actually transmitted after power reduction, and n and m satisfy m + l ≤ w.

Manner 2: When the SRSs on multiple CCs need to be transmitted simultaneously, if the total transmit power of the SRS exceeds the maximum transmit power of the UE, the measurement reference signal with the highest priority is determined as the priority according to the priority of the SRS on each CC. The SRS sent to the network side sends the SRS with the highest priority and removes the remaining SRS.

In the foregoing manners 1 and 2, it is required to sort the priorities of SRSs on multiple CCs. The following describes the priority ranking method of the SRS. The priority ranking method includes two types, which are described below:

Referring to Figure 1, the first way includes:

Step 1: The SRSs of the plurality of CCs are classified according to the periodic SRS and the aperiodic SRS, wherein the priority of the aperiodic SRS is higher than the priority of the periodic SRS;

It should be noted that, in the SRS that needs to be transmitted, the number of aperiodic SRSs may be one or multiple. In this embodiment, the number of aperiodic SRSs is not limited, and includes one aperiodic SRS and multiple non-sequences. Cycle SRS in both cases. Of course, the number of periodic SRSs can also be one or more.

This aperiodic SRS has the highest priority when the SRS to be transmitted contains an aperiodic SRS. If multiple periodic SRSs are included, the priority of the periodic SRS needs to be sorted (see the next steps for the sorting method).

When the SRS that needs to be transmitted includes multiple aperiodic SRSs and multiple periodic SRSs, after determining that the priority of the aperiodic SRS is higher than the priority of the periodic SRS, it is also necessary to separately determine the multiple aperiodic SRSs and the multiple periods. In SRS, the priority of each SRS (see the next step for the sorting method).

Step 2: For the same type of SRS, determine the priority according to the bandwidth of the SRS, and determine the priority of the corresponding SRS from low to high according to the bandwidth from small to large; or;

For the same type of SRS, it is determined that the priority of the SRS on the PCC is higher than the priority of the SRS on the SCC. For the same type of SRS on the SCC, the priority of the SRS on the SSCH with PUSCH transmission is higher than that of the SCC without the PUSCH transmission. Priority of the SRS on;

In addition, for the periodic SRS, the priority may be determined according to the period of the SRS, and the priority of the corresponding SRS is sequentially determined from low to high according to the period from long to short.

In addition, for periodic SRS, the priority of the corresponding SRS may be determined in order from the smallest to the largest, from low to high; for multiple SRSs with equal bandwidth, in order from long to short. The priority of the corresponding SRS is determined in turn from low to high.

Step 3: When the SRS priorities of the multiple CCs are the same, the priority order is determined according to the CC index, and the SRS of the lowest CC index has the highest priority, or the priority of the component carrier configured according to the high layer signaling is determined. The priority of the reference signal is measured. In step 3, when the priorities of the SRSs on the multiple CCs are the same, if the priority is sorted according to the bandwidth and/or period of the SRS in the second step, the priority is sorted in the third step. The SRSs with the same priority may also determine that the SRS priority on the PCC is higher than the SRS on the SCC, and the SRSs on the SCC determine the priority order according to the CC index, and the SRS priority corresponding to the lowest CC index is the highest, or The priority of the component carrier configured by the higher layer signaling determines the priority of the corresponding measurement reference signal.

Not only that, in the case of prioritization, you can also use step 1 and step 3 to sort directly. In the second step, the SRS of the same type may be prioritized according to the bandwidth and/or the period, and the SRS of the PCC is determined to be higher than the SRS of the SCC. The implementation manner is not limited to the combination of the foregoing manners. Any combination of possible ways of prioritizing the levels is within the scope of the present disclosure.

The second method includes the following steps: Step 1: Determine that the priority of the SRS on the PCC is higher than the priority of the SRS on the SCC. Step 2: For the SRS on the SCC, determine that the priority of the aperiodic SRS is higher than the priority of the periodic SRS. ;

In step 2, the number of aperiodic SRSs may be one or multiple. In this embodiment, the number of aperiodic SRSs is not limited, and includes one aperiodic SRS and multiple non-periodic SRSs. Of course, the number of periodic SRSs can also be one or more.

Step 3: For the same type of SRS, it is determined that the priority of the SRS on the SCC with PUSCH transmission is higher than the priority of the SRS on the SCC without PUSCH transmission.

When the priorities of the measurement reference signals of the multiple SCCs are the same, the priority of the corresponding measurement reference signals may be determined from high to low according to the index of the SCC, or the SCC according to the high layer signaling configuration. The priority of the priority is determined from high to low, and the priority of the corresponding measurement reference signal is determined from high to low.

In order to make the objects, the technical solutions and the advantages of the present invention more clearly, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that in the absence of conflict, this application The features of the embodiments and the embodiments may be arbitrarily combined with each other.

It is assumed that there are SRSs on n CCs in subframe i that need to be transmitted simultaneously, and the SRSs on the n CCs are sequentially sorted into C according to the priority from high to low in order of priority. , ς, , , The transmission power of the corresponding SRS on each CC is P _SRS ^P SRS ^P SRS , (^(0.

N-\

Method 1: When ∑P^ _c )〉^ _Cto , send ^, ς ..., ^, knock out the rest of the cc

7=0

m+1 m

SRS, so that 满足P; > _class ≥ ∑P <m<n ₊ \; or, when δ P _SRS , _Cj (0 > P _Poweraass , send c., ς,..., c _m _, , The remaining SRS on the cc, the corpse

Make it satisfy, 1≤ < ".

N-\

Method 2: When ∑ ^(,·)〉/^^. _{When Μ} , only C is sent. , knock out the SRS on the remaining CCs. In order to facilitate the understanding of the present invention, the present invention will be further described below in conjunction with the specific embodiments. Example 1:

This embodiment is a specific embodiment of the first mode, and the UE needs to send three SRSs at the same time as an example. However, the present invention is not limited to the scenario in which three SRSs are simultaneously transmitted, but is applicable to scenarios in which multiple SRSs are simultaneously transmitted.

Embodiment 1-1, a transmission scenario for multiple types of SRSs of the same type.

As shown in Figure 2, when there are SRS transmissions on PCC, SCC1, and SCC2, and the SRS bandwidth on SCC1 is the largest, the SRS bandwidth on PCC and SCC2 is the same, which is smaller than the SRS bandwidth on SCC1, including:

Step a: determining whether the total transmit power of the SRS to be transmitted exceeds the total transmit power of the UE, if ∑ W ≤ L _{CTClass is satisfied} , step b is performed; if ∑ (,) > L _{CT ass} , step C is performed;

Step b: Send multiple SRSs at the same time;

Step c: SRS priority order determined according to the bandwidth of the SRS;

Step d: The SRS on the SCC2 is destroyed, and the sum of the SRS and the SRS transmission power on the SCC1 is calculated. If ^(,) ₊ ^(,) ≤/, 0, the UE simultaneously transmits the SPC. SRS on SRS and SCC1; if u , ) + u , ) > L _OTClass , then knock out the PCC

SRS, sends the SRS on SCC1.

Or

The priority order of the SRSs on the three CCs is configured by the high layer signaling, for example, SCC1>PCC>SCC2, the SRS on the lowest priority SCC2 is first defeated, and then it is determined whether the power of the sent SRS is less than or equal to the UE. The total transmit power, if satisfied, sends the SRS on PCC and SCC1. If not, the SRS on the PCC is destroyed and the SRS on SCC1 is sent.

Embodiment 1-2: This embodiment is directed to scenarios in which SRS types transmitted on multiple CCs are different. As shown in Figure 3, when there are SRS transmissions on PCC, SCC1, and SCC2, and aperiodic SRS is sent on PCC, periodic SRS is sent on SCC1 and SCC2, and SRS bandwidth on SCC1 is the same as SRS on SCC2. The cycle is different. The SRS period on SCC1 is shorter than the SRS period on SCC2, including:

Step a: determining whether the total transmit power of the SRS exceeds the total transmit power of the UE. If ∑U) ≤ _iL CTClass is _satisfied , step b is performed; if ∑U)> L^ _lass , step c is performed; step b: simultaneously transmitting Multiple SRSs, no power reduction of SRS is required;

Step c: The determined SRS priority order, the aperiodic SRS priority is higher than the periodic SRS priority, and when the SRS type is the same, the short SRS priority is higher than the long SRS priority; Step d: Select to disable SCC2 On the upper periodic SRS, calculate the sum of the aperiodic SRS on the PCC and the periodic SRS transmit power on the SCC1. If _SRS , » U , ) ≤ L _CTClass , the UE simultaneously transmits the period on the aperiodic SRS and SCC1 on the PCC. SRS, if

^ _SRS . _cc ( +^ _RS , _ccl ( > _wer c _lass ' then _breaks the periodic SRS on SCC1 and only sends the aperiodic SRS on PCC.

Embodiment 1-3, this embodiment is directed to scenarios in which SRS types transmitted on multiple CCs are different. As shown in Figure 4, when there are SRS transmissions on PCC, SCC1 and SCC2, and periodic SRS is sent on PCC and SCC2, aperiodic SRS is sent on SCC1, and the SRS on PCC is shorter than SRS on SCC2. Cycle, including: Step a: determining whether the total transmit power of the SRS exceeds the total transmit power of the UE. If _∑U ) ≤ ^L _{CTClass is satisfied} , step b is performed; if ∑U)> L^ _lass , step c is performed; step b: simultaneously Sending the multiple SRSs does not require power reduction of the SRS; Step c: Determine the SRS priority order, the aperiodic SRS priority is higher than the periodic SRS priority, and when the SRS type is the same, the short SRS priority is higher than the periodic The priority of the long SRS, choose to cancel the periodic SRS on the SCC2, and then calculate the sum of the periodic SRS on the PCC and the aperiodic SRS transmit power on the SCC1. If ^^+ i^ ^ Le^, the UE simultaneously sends the PCC. On the periodic SRS and the aperiodic SRS on SCC1, if P _SRS , » i _SRS ^ (,) > iL _CTaass , the periodic SRS on the PCC is destroyed, and only the aperiodic SRS on SCC1 is transmitted.

Embodiment 2 This embodiment is a specific embodiment only for the second method. This embodiment is described by taking the case that the UE needs to send three SRSs at the same time. However, the present invention is not limited to the scenario in which three SRSs are simultaneously transmitted, but is applicable to scenarios in which multiple SRSs are simultaneously transmitted.

Embodiment 2-1, this embodiment is directed to a scenario in which SRSs of the same type are transmitted on multiple CCs. As shown in Figure 2, when PCC, SCC1, and SCC2 have SRS transmissions at the same time, and each

The SRS cycles and bandwidths on the CC are the same, including:

Step a: determining whether the total transmit power of the SRS exceeds the total transmit power of the UE. If _∑U ) ≤ ^L _{CTClass is satisfied} , step b is performed; if ∑U)> L^ _lass , step c is performed; step b: simultaneously Sending the multiple SRSs does not require power reduction of the SRS; Step c: determining the priority order of the SRSs on each CC, determining the priority of the SRS according to the index of the predefined CC, PCC>SCC1>SCC2, and according to the manner The second defined reduction method simultaneously removes the SRS on SCC1 and SCC2 and sends the SRS on the PCC.

Or

The priority order of the three CCs is configured by higher layer signaling, such as PCC>SCC2>SCC1, and the SRSs on SCC1 and SCC2 are destroyed, and the SRS on the PCC is sent.

Embodiment 2-2, this embodiment is directed to a scenario in which SRS types transmitted on multiple CCs are different. As shown in Figure 3, when there are SRS transmissions on PCC, SCC1, and SCC2, and aperiodic SRS is sent on PCC, periodic SRS is sent on SCC1 and SCC2, and the SRS bandwidth on SCC1 is larger than SRS on SCC2, including :

Step a: determining whether the total transmit power of the SRS exceeds the total transmit power of the UE. If _∑U )≤/L _{CTClass is satisfied} , step b is performed; if ∑U)>L^ _lass , step c is performed; step b: simultaneously Sending the plurality of SRSs does not require power reduction of the SRS. Step c: determining the priority order of the SRS according to the SRS whose priority is higher than the periodic SRS and the SRS with the larger bandwidth is higher than the SRS with the smaller bandwidth. The periodic SRS on SCC1 and SCC2 is destroyed, and the aperiodic SRS on the PCC is transmitted.

Or

According to the principle that the aperiodic SRS priority is higher than the periodic SRS and the higher-level signaling configuration, such as PCC>SCC2>SCC1, the SRS on SCC1 and SCC2 are simultaneously cancelled, and the SRS on the PCC is sent.

Embodiment 2-3: This embodiment is directed to a scenario in which SRS types transmitted on multiple CCs are different. As shown in Figure 4, when there are SRS transmissions on PCC, SCC1, and SCC2, and SRSs of the same bandwidth are transmitted on PCC and SCC2, and acyclic SRSs are sent on SCC1, including: Step a: Determine the total SRS Whether the transmission power exceeds the total transmission power of the UE, if _∑U ) ≤ ^L _{CTClass is satisfied} , step b is performed; if ∑U)> L^ _lass , step c is performed; step b: transmitting the plurality of SRSs at the same time, The SRS power reduction is required. Step c: According to the aperiodic SRS priority higher than the periodic SRS and the CC index, determine the priority SCC1>PCC>SCC2, select to cancel the periodic SRS on the PCC and SCC2, and send the aperiodic on the SCC1. SRS.

Or

According to the principle that the aperiodic SRS priority is higher than the periodic SRS and the high-level signaling configuration

The priority order of the CC, such as PCC>SCC2>SCC1, simultaneously destroys the SRS on SCC1 and SCC2, and sends the periodic SRS on the PCC. The embodiment 3 is described by taking the case that the UE needs to send two SRSs at the same time. However, the present invention is not limited to the scenario in which two SRSs are simultaneously transmitted, but is applicable to scenarios in which multiple SRSs are simultaneously transmitted.

When the SRSs on two CCs are transmitted simultaneously, if a non-periodic SRS is sent on CC1,

The periodic SRS is sent on CC2, and P _{SRS C} ( ) > _PowerClass , then the SRS on CC2 is selected and only the SRS on CC1 is sent.

When the SRSs on the two CCs are transmitted simultaneously, if the same type of SRS is transmitted on CC1 and CC2, and _∑P _SRS , )> L _OTClass , the SRS on CC2 is destroyed according to the CC index, or the CC1 and CC2 are compared. SRS bandwidth, SRS with low bandwidth, only SRS with large bandwidth; If the bandwidth is equal, select SRS with long period and SRS with smaller transmission period.

5 is a transmitting apparatus for measuring a reference signal according to an embodiment of the present invention, which is applied to an advanced long-term evolution system, and includes: a power determining unit, a priority sorting unit, a signal determining unit, and a signal transmitting unit, where:

The power judging unit is configured to: when transmitting the measurement reference signals of the plurality of component carriers to the network side, determine whether the total transmission power of the measurement reference signals of the plurality of component carriers is greater than the maximum transmit power of the terminal;

The prioritization unit is configured to: prioritize the measurement reference signals of the plurality of component carriers when the power determination unit determines that the total transmit power of the measurement reference signals of the multiple component carriers is greater than the maximum transmit power of the terminal;

The signal determining unit is configured to: prioritize the measurement reference signals of the plurality of component carriers according to the prioritization unit, and determine, from the measurement reference signals of the plurality of component carriers, the measurement reference signals to be sent to the network side, to be sent to The total transmit power of the measurement reference signal on the network side is less than or equal to the maximum transmit power of the terminal;

The signal transmitting unit is arranged to transmit the measurement reference signal to be transmitted to the network side determined by the signal determining unit to the network side.

The signal determining unit is prioritized according to the priority of the measurement reference signals of the plurality of component carriers The lowest priority measurement reference signal, and determining whether the total transmission power of the remaining measurement reference signal is greater than the maximum transmission power of the terminal. If it is greater, the measurement reference signal with the lowest priority is removed again, and the judgment operation is performed until the remaining measurement When the total transmit power of the reference signal is not greater than the maximum transmit power of the terminal, the remaining measurement reference signal is determined as the measurement reference signal to be sent to the network side; or, according to the priority order of the measurement reference signals of the multiple component carriers, The highest priority measurement reference signal is determined as the measurement reference signal to be transmitted to the network side.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

In the present invention, the present invention prioritizes measurement reference signals on respective component carriers, removes measurement reference signals on one or more component carriers with lower priority, and reduces total transmission power to solve multiple component carriers. When the measurement reference signal is transmitted at the same time, the problem that the total transmission power exceeds the maximum transmission power of the terminal cannot be normally transmitted, the effective scheduling of the base station is ensured, and the transmission performance of the measurement reference signal is improved.

Claims

Claim

A method for transmitting a measurement reference signal, which is applied to an advanced long-term evolution system, comprising: determining, when transmitting a measurement reference signal of a plurality of component carriers to a network side, a total transmission of measurement reference signals of the plurality of component carriers Whether the power is greater than the maximum transmit power of the terminal, and if yes, determining, from the measurement reference signals of the plurality of component carriers, the measurement reference signal to be sent to the network side, and the total transmission of the measurement reference signal to be sent to the network side The power is less than or equal to the maximum transmit power of the terminal.

2. The method of claim 1 further comprising:

Prior to determining the measurement reference signal to be transmitted to the network side, prioritizing the measurement reference signals of the plurality of component carriers;

3. The method according to claim 2, wherein the determining, according to the priority ordering of the measurement reference signals of the plurality of component carriers, the measurement reference signal to be transmitted to the network side comprises: according to the plurality of component carriers Measure the priority order of the reference signal, remove the measurement reference signal with the lowest priority, and determine whether the total transmit power of the remaining measurement reference signal is greater than the maximum transmit power of the terminal, and if greater, remove the measurement reference with the lowest priority again. Signaling, and performing the determining operation, until the total transmit power of the remaining measurement reference signals is less than or equal to the maximum transmit power of the terminal, determining the remaining measurement reference signals as the measurement reference signals to be sent to the network side Or,

4. The method of claim 3, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers comprises:

Passing the plurality of component carriers according to the aperiodic measurement reference signal and the periodic measurement reference signal The measurement reference signals are classified to determine that the priority of the aperiodic measurement reference signal is higher than the priority of the measurement reference signal of the period.

5. The method of claim 4, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers further comprises:

优先 Prioritize the same type of measurement reference signals in one of the following ways: Method 1: Determine the priority of the measurement reference signals of the corresponding component carriers from low to large in order of low to large; Determining, according to the period from long to short, the priority of the measurement reference signal of the corresponding component carrier is from low to high; and mode three: first determining the priority of the measurement reference signal of the corresponding component carrier according to the order of the bandwidth from small to large The level is from low to high. For the measurement reference signals of multiple component carriers with equal bandwidth, the priority of the corresponding measurement reference signal is determined from low to high according to the order of the period from long to short.

6. The method according to claim 4 or 5, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers further comprises:

When the priority of the measurement reference signals of the component carriers is the same, determining that the priority of the measurement reference signal of the primary component carrier is higher than the priority of the measurement reference signal of the secondary component carrier; and the priority of the measurement reference signal when there is a secondary component carrier When the levels are the same, determining the priority of the corresponding measurement reference signal from high to low according to the index of the secondary component carrier from low to high; or determining the priority of the secondary component carrier according to the high layer signaling configuration The priority of the measurement reference signal.

The method according to claim 4 or 5, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers further comprises: when the measurement reference signals of the component carriers have the same priority, according to Determining, according to the index of the component carrier, the priority of the corresponding measurement reference signal from high to low; or determining the priority of the corresponding measurement reference signal according to the priority of the component carrier configured by the high layer signaling level.

8. The method according to claim 4 or 5, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers further comprises:

For the same type of measurement reference signal, determining that the measurement reference signal of the primary component carrier has a higher priority than the measurement reference signal of the secondary component carrier, and determining the physical reference for the measurement reference signal of the secondary component carrier of the same type The priority of the measurement reference signal of the secondary component carrier of the shared channel transmission is higher than the priority of the measurement reference signal of the secondary component carrier without the uplink shared channel transmission.

9. The method of claim 8, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers further comprises:

When the priorities of the measurement reference signals having the secondary component carriers are the same, determining the priority of the corresponding measurement reference signals from high to low according to the index of the secondary component carriers from low to high; or, according to the high layer signaling The priorities of the configured secondary component carriers are determined from high to low, and the priority of the corresponding measurement reference signals is determined to be high to low.

10. The method of claim 3, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers comprises:

Determining that the priority of the measurement reference signal of the primary component carrier is higher than the priority of the measurement reference signal of the secondary component carrier;

And classifying the measurement reference signal of the secondary component carrier according to the aperiodic measurement reference signal and the periodic measurement reference signal, determining that the priority of the aperiodic measurement reference signal is higher than the priority of the measurement reference signal of the period And determining, for the measurement reference signal of the same type of secondary component carrier, the priority of the measurement reference signal having the secondary component carrier of the physical uplink shared channel transmission is higher than the priority of the measurement reference signal of the secondary component carrier without the uplink shared channel transmission .

The method of claim 10, wherein the step of prioritizing the measurement reference signals of the plurality of component carriers further comprises:

When the priority of the measurement reference signal having the secondary component carrier is the same, according to the secondary component carrier Determining the priority of the corresponding measurement reference signal from high to low in order of low to high; or determining the corresponding measurement reference in descending order of priority of the secondary component carrier configured according to high layer signaling The priority of the signal is from high to low.

12. The method of claim 1, further comprising: measuring the plurality of component carriers if a total transmit power of the measurement reference signals of the plurality of component carriers is less than or equal to a maximum transmit power of the terminal The reference signal is sent to the network side.

13. A transmitting apparatus for measuring a reference signal, which is applied to an advanced long term evolution system, comprising: a power judging unit, a signal determining unit, and a signal transmitting unit, wherein:

The power determining unit is configured to: determine, when the measurement reference signal of the multiple component carriers is sent to the network side, whether the total transmit power of the measurement reference signal of the multiple component carriers is greater than a maximum transmit power of the terminal; The unit is configured to: when the power determining unit determines that a total transmit power of the measurement reference signal of the multiple component carriers is greater than a maximum transmit power of the terminal, determine, to send from the measurement reference signals of the multiple component carriers a measurement reference signal to the network side, where a total transmission power of the measurement reference signal to be sent to the network side is less than or equal to a maximum transmission power of the terminal;

14. The apparatus of claim 13, further comprising a prioritization unit, wherein: the prioritization unit is configured to: determine, at the power determination unit, a total transmit power of a measurement reference signal of the plurality of component carriers When the maximum transmit power of the terminal is greater than, the measurement reference signals of the plurality of component carriers are prioritized; the signal determining unit is configured to measure the plurality of component carriers according to the prioritization unit And prioritizing the reference signals, and determining, from the measurement reference signals of the plurality of component carriers, the measurement reference signals to be sent to the network side.

15. The apparatus according to claim 13, wherein The signal determining unit is configured to determine the measurement reference signal to be transmitted to the network side by: