CN102355717B - A kind of method and mobile terminal sending multiple uplink signals - Google Patents
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Abstract
The invention discloses a kind of method and mobile terminal sending multiple uplink signals, the method includes：Mobile terminal needs send random access leader sequence in auxiliary component carrier, it is sent on other component carriers simultaneously one or more in Physical Uplink Shared Channel, Physical Uplink Control Channel and detection reference signal, and respectively when required total transmission power of signaling is more than mobile terminal maximum transmission power, removal and/or the one or more power to be signaled of reduction.The above method when sending targeting sequencing in an auxiliary component carrier while in transmission uplink signal on other component carriers, can improve the effective percentage accessed in this auxiliary component carrier and the uplink signal transmissions effective percentage on other component carriers in UE.
Description
Technical Field
The present invention relates to the field of communications, and in particular, to a method and a mobile terminal for transmitting multiple uplink signals in a system using a carrier aggregation technique.
Background
An Uplink Physical Channel of a Long Term Evolution (LTE) system includes a Physical Random Access Channel (PARCH), a Physical Uplink Shared Channel (PUSCH), and a Physical Uplink Control Channel (PUCCH). The PRACH channel mainly serves to implement uplink synchronization and cell handover. In addition, in the LTE system, a Sounding Reference Signal (SRS) for uplink channel measurement needs to be transmitted.
In the LTE system, due to different locations of different User Equipments (UEs) from a base station (eNB), the arrival times of signals of the UEs at the eNB are different. In an actual system, the time of the eNB is used as a reference, so it is necessary to estimate the time delay of different UEs reaching the base station, and ensure that signals of different UEs are received by the eNB at the same time. The PRACH channel measures the time delays from different UEs to the base station by sending a preamble sequence (preamble), thereby implementing uplink synchronization. Meanwhile, in the process of cell switching, the PRACH synchronizes the target base station by sending a leader sequence, thereby realizing rapid switching among cells.
The preamble sequence of the PRACH fixedly occupies 6 resource blocks in the frequency domain and 1 to multiple subframes in the time domain. The leader sequence is divided into a public leader sequence and a special leader sequence, and respectively corresponds to a competitive random access process and a non-competitive random access process.
In order to meet the requirement of the International telecommunications union-Advanced (ITU-Advanced for short), a Long term evolution-Advanced (Long term evolution-Advanced, LTE-a) system, which is an evolution standard of LTE, needs to support a larger system bandwidth (up to 100MHz) and needs to be backward compatible with the existing standard of LTE. On the basis of the existing LTE system, the bandwidth of the LTE system can be combined to obtain larger bandwidth, the technology is called Carrier Aggregation (CA) technology, the technology can improve the spectrum utilization rate of the IMT-Advance system, relieve the shortage of spectrum resources and further optimize the utilization of the spectrum resources.
In a system in which carrier aggregation is introduced, a carrier to be aggregated is referred to as a Component Carrier (CC), which is also referred to as a Cell (Cell). Meanwhile, the concept of Primary Component Carrier/Cell (PCC/PCell) and Secondary Component Carrier/Cell (SCC/SCell) is also proposed, and in a system with Carrier aggregation, at least one Primary Component Carrier and one Secondary Component Carrier are included, wherein the Primary Component Carrier is always in an active state.
Since the LTE-a system introduces the concept of carrier aggregation, on the premise that the eNB and the UE are synchronized in other cells, if the Scell is allowed to perform a random access procedure, a preamble needs to be sent on the Scell. When UE sends preamble on Scell for measurement of channel delay, there may be a situation that other cells send data at the same time, and at this time, the preamble may be transmitted at the same time with uplink channel PUCCH/PUSCH/SRS, resulting in limited UE power and requiring power reduction. Therefore, when the random access preamble sequence in the Scell is transmitted simultaneously with a plurality of uplink channels PUCCH/PUSCH/SRS in other cells, how to perform power reduction needs to be considered to ensure the efficient Scell access and the efficient transmission of a plurality of uplink signals in other cells.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a method and a mobile terminal for sending a plurality of uplink signals, and when UE sends a preamble sequence on an auxiliary component carrier and sends uplink signals on other component carriers simultaneously, the access efficiency on the auxiliary component carrier and the uplink signal transmission efficiency on other component carriers are improved.
In order to solve the above technical problem, the present invention provides a method for transmitting a plurality of uplink signals, including: the mobile terminal needs to send a random access preamble sequence on the secondary component carrier, and simultaneously sends one or more of a physical uplink shared channel, a physical uplink control channel and a sounding reference signal on other component carriers, and when the total transmission power required by each signal to be sent is greater than the maximum transmission power of the mobile terminal, the power of one or more signals to be sent is removed and/or reduced.
Further, the method can also have the following characteristics:
and canceling sending the random access preamble sequence, and performing power reduction according to the priority order of the uplink shared channel, the physical uplink control channel and the sounding reference signal.
Further, the method can also have the following characteristics:
and performing power reduction according to the priority order of the random access leader sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal.
Further, the method can also have the following characteristics:
removing the signal with the lowest priority from the signals to be transmitted and judging whether the total transmitting power required by the rest signals to be transmitted is greater than the maximum transmitting power of the mobile terminal or not, if so, removing the signal with the lowest priority from the rest signals, and so on until the total transmitting power required by the rest signals to be transmitted is less than or equal to the maximum transmitting power of the mobile terminal; or reducing the transmitting power of the signal with the lowest priority in the signal to be transmitted and judging whether the total transmitting power required by the signal to be transmitted is greater than the maximum transmitting power of the mobile terminal or not until the total transmitting power required by the signal to be transmitted is less than or equal to the maximum transmitting power of the mobile terminal.
Further, the method can also have the following characteristics:
the priority ordering is from high to low as follows: a physical uplink control channel, a physical uplink shared channel, a sounding reference signal and a random access preamble sequence; or; a physical uplink control channel, a physical uplink shared channel, a random access preamble sequence and a sounding reference signal; or; physical uplink control channel, random access leader sequence, physical uplink shared channel, and sounding reference signal.
Further, the method can also have the following characteristics:
and performing equal power reduction on one or more signals in the random access preamble sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal.
Further, the method can also have the following characteristics:
performing power reduction according to the type of the signal to be transmitted, specifically comprising:
when the random access preamble sequence and the physical uplink control channel are sent simultaneously, the power of the random access preamble sequence and the physical uplink control channel is reduced in an equal power mode or in accordance with the priority of the random access preamble sequence and the physical uplink control channel;
when a random access preamble sequence and a physical uplink shared channel are sent simultaneously, the sending power of the physical uplink shared channel is reduced preferentially;
when the random access preamble sequence and a plurality of physical uplink shared channels are sent simultaneously, the power of the physical uplink shared channels without uplink control information is reduced preferentially, or the equal power reduction is carried out on the plurality of physical uplink shared channels;
when the random access leader sequence and a sounding reference signal are transmitted simultaneously, the transmission power of the sounding reference signal is reduced preferentially;
when the random access preamble sequence and the plurality of sounding reference signals are sent simultaneously, the plurality of sounding reference signals are preferentially subjected to equal power reduction;
and when one or more signals of the random access preamble sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal are sent at the same time, power reduction is carried out according to the sequence of the physical uplink control channel, the random access preamble sequence, the physical uplink shared channel and the sounding reference signal from high priority to low priority.
Further, the method can also have the following characteristics:
configuring high-layer parameter leader sequence initial receiving target power and power increment step size for determining target receiving power of random access leader sequence of secondary component carrier wave to adjust transmitting power of the random access leader sequence.
In order to solve the above technical problem, the present invention provides a mobile terminal for transmitting a plurality of uplink signals, wherein the mobile terminal comprises an uplink signal power adjustment module and an uplink signal transmission module; the uplink signal power adjusting module is used for sending a random access preamble sequence on an auxiliary component carrier, and simultaneously sending one or more of a physical uplink shared channel, a physical uplink control channel and a sounding reference signal on other component carriers, and removing and/or reducing the power of one or more signals to be sent when the total transmitting power required by each signal to be sent is greater than the maximum transmitting power of the mobile terminal; and the uplink signal sending module is configured to send the one or more uplink signals to be sent determined by the uplink signal power adjustment module.
Further, the mobile terminal may further have the following characteristics:
the uplink signal power adjustment module is further configured to perform uplink signal power adjustment according to one of the following manners:
the method comprises the steps that firstly, sending of a random access leader sequence is cancelled, and power reduction is carried out according to the priority sequence of an uplink shared channel, a physical uplink control channel and a sounding reference signal;
performing power reduction according to the priority sequence of the random access leader sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal;
in the third mode, one or more signals in a random access leader sequence, a physical uplink shared channel, a physical uplink control channel and a sounding reference signal are subjected to equal power reduction;
the method IV is that power reduction is carried out according to the type of the signal to be sent;
and a fifth mode, configuring high-level parameter leader sequence initial receiving target power and power increment step size for determining target receiving power of the random access leader sequence of the secondary component carrier, and adjusting the sending power of the random access leader sequence.
The method can improve the access efficiency on the auxiliary component carrier and the uplink signal transmission efficiency on other component carriers when the UE sends the leader sequence on the auxiliary component carrier and simultaneously sends the uplink signal on other component carriers.
Drawings
Fig. 1 is a schematic diagram of a mobile terminal transmitting a plurality of uplink signals;
FIG. 2 is a schematic diagram of signal power adjustment in embodiment 1-1;
FIG. 3 is a schematic diagram of signal power adjustment in the embodiment 1-2;
FIG. 4 is a schematic diagram of signal power adjustment in embodiment 2-1;
FIG. 5 is a schematic diagram of signal power adjustment in embodiment 2-1;
FIG. 6 is a schematic diagram of signal power adjustment in embodiment 3-1;
FIG. 7 is a schematic diagram of signal power adjustment in embodiment 3-1;
FIG. 8 is a schematic diagram of signal power adjustment in embodiment 4-1;
FIG. 9 is a schematic diagram of signal power adjustment in embodiment 4-2;
fig. 10 is a schematic diagram of signal power adjustment in embodiment 4-3.
Detailed Description
The method for transmitting a plurality of uplink signals comprises the following steps: the mobile terminal needs to send a random access preamble sequence on the secondary component carrier, and simultaneously sends one or more of a physical uplink shared channel, a physical uplink control channel and a sounding reference signal on other component carriers, and when the total transmission power required by each signal to be sent is greater than the maximum transmission power of the mobile terminal, the power of one or more signals to be sent is removed and/or reduced.
As shown in fig. 1, a mobile terminal for transmitting a plurality of uplink signals includes an uplink signal power adjustment module and an uplink signal transmission module;
the uplink signal power adjusting module is used for sending a random access leader sequence on an auxiliary component carrier, and simultaneously sending one or more of a physical uplink shared channel, a physical uplink control channel and a sounding reference signal on other component carriers, and removing and/or reducing the power of one or more signals to be sent when the total transmission power required by each signal to be sent is greater than the maximum transmission power of the mobile terminal;
and the uplink signal sending module is used for sending the one or more uplink signals to be sent determined by the uplink signal power adjusting module.
Wherein the other component carrier may be one or more of a primary component carrier or other component carriers other than the secondary component carrier described above.
The power adjustment mode of the uplink signal power adjustment module may adopt one of the following modes:
the first method is as follows:
and canceling sending the random access preamble sequence, and performing power reduction according to the priority order of the uplink shared channel, the physical uplink control channel and the sounding reference signal.
The second method comprises the following steps:
and performing power reduction according to the priority order of the random access leader sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal.
In the first mode and the second mode, specifically, removing the signal with the lowest priority in the to-be-transmitted signals and judging whether the total transmission power required by the remaining to-be-transmitted signals is greater than the maximum transmission power of the mobile terminal, if so, removing the signal with the lowest priority in the remaining signals, and so on until the total transmission power required by the remaining to-be-transmitted signals is less than or equal to the maximum transmission power of the mobile terminal; or reducing the transmitting power of the signal with the lowest priority in the signal to be transmitted and judging whether the total transmitting power required by the signal to be transmitted is greater than the maximum transmitting power of the mobile terminal or not until the total transmitting power required by the signal to be transmitted is less than or equal to the maximum transmitting power of the mobile terminal.
The priority ordering is from high to low as follows:
a physical uplink control channel, a physical uplink shared channel, a sounding reference signal and a random access preamble sequence;
or;
a physical uplink control channel, a physical uplink shared channel, a random access preamble sequence and a sounding reference signal;
or;
physical uplink control channel, random access leader sequence, physical uplink shared channel, and sounding reference signal.
The third method comprises the following steps:
and performing equal power reduction on one or more signals in the random access preamble sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal.
The method is as follows:
performing power reduction according to the type of the signal to be transmitted, specifically comprising:
when the random access preamble sequence and the physical uplink control channel are sent simultaneously, the power of the random access preamble sequence and the physical uplink control channel is reduced in an equal power mode or in accordance with the priority of the random access preamble sequence and the physical uplink control channel;
when a random access preamble sequence and a physical uplink shared channel are sent simultaneously, the sending power of the physical uplink shared channel is reduced preferentially;
when the random access preamble sequence and a plurality of physical uplink shared channels are sent simultaneously, the power of the physical uplink shared channels without uplink control information is reduced preferentially, or the equal power reduction is carried out on the plurality of physical uplink shared channels;
when the random access leader sequence and a sounding reference signal are transmitted simultaneously, the transmission power of the sounding reference signal is reduced preferentially;
when the random access preamble sequence and the plurality of sounding reference signals are sent simultaneously, the plurality of sounding reference signals are preferentially subjected to equal power reduction;
and when one or more signals of the random access preamble sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal are sent at the same time, power reduction is carried out according to the sequence of the physical uplink control channel, the random access preamble sequence, the physical uplink shared channel and the sounding reference signal from high priority to low priority.
The fifth mode is as follows:
configuring a high-level parameter Preamble sequence Initial Received Target Power (Preamble Initial Received Target Power) and a Power increasing Step (Power Ramping Step) for determining the Target Received Power of the random access Preamble sequence of the secondary component carrier to adjust the transmission Power of the random access Preamble sequence.
The method can improve the access efficiency on the auxiliary component carrier and the uplink signal transmission efficiency on other component carriers when the UE sends the leader sequence on the auxiliary component carrier and simultaneously sends the uplink signal on other component carriers.
For ease of understanding, the following further description of implementations is provided in connection with specific embodiments.
Detailed description of the preferred embodiment 1
The present embodiment corresponds to the first embodiment.
Specific examples 1 to 1
The present embodiment only adopts a scenario in which, when a preamble is transmitted simultaneously with a PUCCH and a PUSCH, the preamble is removed and power reduction is performed according to a predefined priority order.
Specific examples 1 to 2
In the present embodiment, only when the preamble is transmitted simultaneously with a plurality of SRSs, the preamble is removed and power reduction is performed according to the equal power reduction principle.
As shown in fig. 3, when there is SRS transmission on PCC, preamble transmission on SCC1, SRS transmission on SCC2, and the transmission power of the UE exceeds the maximum transmission power of the UE, the preamble on the SCC is removed first, and then equal power reduction is performed on the PCC and the SRS on SCC 2.
Specific example 2
The present embodiment corresponds to the second embodiment.
Specific example 2-1
The present embodiment is only directed to a scenario in which power reduction is performed according to a predefined priority order when a preamble is transmitted simultaneously with a PUCCH and a PUSCH.
Specific examples 2 to 2
The present embodiment is only directed to a scenario in which when a preamble is transmitted simultaneously with a PUCCH and a PUSCH, power reduction is performed according to a principle of removing a channel with the lowest priority.
Specific example 3
This embodiment corresponds to the third embodiment.
Specific example 3-1
The present embodiment is only directed to a scenario in which power reduction is performed according to an equal power reduction principle when a preamble is transmitted simultaneously with a PUCCH and a PUSCH.
Specific examples 3 to 2
The present embodiment is only directed to a scenario in which when a preamble is transmitted simultaneously with multiple SRSs, power reduction is performed according to the principle of equal power reduction.
As shown in fig. 7, when there is SRS transmission on PCC, preamble transmission on SCC1, and SRS transmission on SCC2, if the total transmit power of the UE exceeds the maximum transmit power of the UE, the SRS and the preamble are power-reduced equally, so that the total transmit power after reduction does not exceed the maximum transmit power of the UE.
Specific example 4
This embodiment corresponds to the fourth mode.
Specific example 4-1
The present embodiment is only directed to a scenario in which power reduction is performed according to the principle of equal power reduction when a preamble and a PUCCH are simultaneously transmitted.
As shown in fig. 8, when the PCC has PUCCH transmission, the SCC1 has preamble transmission, and the total transmit power of the UE exceeds the maximum transmit power of the UE, the PUCCH and the preamble are subjected to equal power reduction, so that the reduced total transmit power does not exceed the maximum transmit power of the UE.
Specific example 4-2
In this embodiment, only when the preamble is transmitted simultaneously with a plurality of PUSCHs, the power reduction is performed according to the predefined priority order.
As shown in fig. 9, when there is PUSCH including UCI on PCC, preamble is sent on SCC1, PUSCH without UCI is sent on SCC2, and total transmission power of UE exceeds maximum transmission power of UE, power reduction is performed on PUSCH without UCI on SCC2, so that the total transmission power after reduction does not exceed the maximum transmission power of UE.
Specific examples 4 to 3
In this embodiment, only when the preamble and the SRS are transmitted simultaneously, the power reduction is performed according to the predefined priority order and the equal power reduction principle.
As shown in fig. 10, when there is SRS transmission on PCC, preamble transmission on SCC1, SRS transmission on SCC2, and the total transmission power of the UE exceeds the maximum transmission power of the UE, the power of the SRS on PCC and SCC2 is reduced by equal power, so that the reduced total transmission power does not exceed the maximum transmission power of the UE.
It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.
It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing the relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a magnetic or optical disk, and the like. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module/unit in the above embodiments may be implemented in the form of hardware, and may also be implemented in the form of a software functional module. The present invention is not limited to any specific form of combination of hardware and software.
Claims (4)
1. A method of transmitting a plurality of uplink signals,
the mobile terminal needs to send a random access preamble sequence on an auxiliary component carrier, and simultaneously sends one or more of a physical uplink shared channel, a physical uplink control channel and a sounding reference signal on other component carriers, and when the total transmission power required by each signal to be sent is greater than the maximum transmission power of the mobile terminal, one or more signals to be sent are removed and/or the power of one or more signals to be sent is reduced;
wherein, the uplink signal power adjustment is performed according to one of the following modes:
the method comprises the steps that firstly, sending of a random access leader sequence is cancelled, and power reduction is carried out according to the priority sequence of an uplink shared channel, a physical uplink control channel and a sounding reference signal;
performing power reduction according to the priority sequence of the random access leader sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal;
and in a third mode, power reduction is carried out according to the type of the signal to be sent, and the method specifically comprises the following steps:
when the random access preamble sequence and a plurality of physical uplink shared channels are sent simultaneously, the power of the physical uplink shared channels without uplink control information is reduced preferentially, or the equal power reduction is carried out on the plurality of physical uplink shared channels;
or,
when the random access preamble sequence and the plurality of sounding reference signals are sent simultaneously, the plurality of sounding reference signals are preferentially subjected to equal power reduction;
and configuring a high-level parameter for determining the target receiving power of the random access leader sequence of the secondary component carrier, and adjusting the sending power of the random access leader sequence according to the initial receiving target power of the leader sequence and the power increment step size.
2. The method of claim 1,
when the uplink signal power is adjusted according to the first mode or the second mode, removing the signal with the lowest priority in the signals to be transmitted and judging whether the total transmission power required by the rest signals to be transmitted is greater than the maximum transmission power of the mobile terminal, if so, removing the signal with the lowest priority in the rest signals, and so on until the total transmission power required by the rest signals to be transmitted is less than or equal to the maximum transmission power of the mobile terminal;
or,
and reducing the transmitting power of the signal with the lowest priority in the signals to be transmitted and judging whether the total transmitting power required by the signals to be transmitted is greater than the maximum transmitting power of the mobile terminal or not until the total transmitting power required by the signals to be transmitted is less than or equal to the maximum transmitting power of the mobile terminal.
3. The method of claim 1,
when the uplink signal power is adjusted according to the second mode, the priority sequence from high to low is as follows:
a physical uplink control channel, a physical uplink shared channel, a sounding reference signal and a random access preamble sequence;
or;
a physical uplink control channel, a physical uplink shared channel, a random access preamble sequence and a sounding reference signal;
or;
physical uplink control channel, random access leader sequence, physical uplink shared channel, and sounding reference signal.
4. A mobile terminal for transmitting a plurality of uplink signals,
the mobile terminal comprises an uplink signal power adjusting module and an uplink signal sending module;
the uplink signal power adjusting module is used for sending a random access preamble sequence on an auxiliary component carrier, and simultaneously sending one or more of a physical uplink shared channel, a physical uplink control channel and a sounding reference signal on other component carriers, and removing and/or reducing the power of one or more signals to be sent when the total transmitting power required by each signal to be sent is greater than the maximum transmitting power of the mobile terminal;
the uplink signal transmitting module is configured to transmit the one or more uplink signals to be transmitted, which are determined by the uplink signal power adjusting module;
the uplink signal power adjustment module is further configured to perform uplink signal power adjustment according to one of the following manners:
the method comprises the steps that firstly, sending of a random access leader sequence is cancelled, and power reduction is carried out according to the priority sequence of an uplink shared channel, a physical uplink control channel and a sounding reference signal;
performing power reduction according to the priority sequence of the random access leader sequence, the physical uplink shared channel, the physical uplink control channel and the sounding reference signal;
and in a third mode, power reduction is carried out according to the type of the signal to be sent, and the method specifically comprises the following steps:
when the random access preamble sequence and a plurality of physical uplink shared channels are sent simultaneously, the power of the physical uplink shared channels without uplink control information is reduced preferentially, or the equal power reduction is carried out on the plurality of physical uplink shared channels;
or,
when the random access preamble sequence and the plurality of sounding reference signals are sent simultaneously, the plurality of sounding reference signals are preferentially subjected to equal power reduction;
and configuring a high-level parameter for determining the target receiving power of the random access leader sequence of the secondary component carrier, and adjusting the sending power of the random access leader sequence according to the initial receiving target power of the leader sequence and the power increment step size.
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| WO2014085967A1 (en) * | 2012-12-03 | 2014-06-12 | 华为技术有限公司 | Method and user equipment for adjusting sending time |
| CN105532024B (en) * | 2014-08-16 | 2019-05-07 | 华为技术有限公司 | A kind of multi channel simultaneous transmission method of uplink and base station and user equipment |
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