CN107005390A

CN107005390A - A kind of method and apparatus that send and receive of SRS

Info

Publication number: CN107005390A
Application number: CN201580067806.5A
Authority: CN
Inventors: 吴强; 刘建琴; 刘鹍鹏; 张雷鸣
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2015-04-10
Filing date: 2015-08-14
Publication date: 2017-08-01
Also published as: WO2016161738A1

Abstract

User equipment (UE) determines to send SRS coverage；The UE sends a SRS using an antenna in four antennas in a frequency hopping subcycle to base station eNB；Wherein, hop period includes at least two frequency hopping subcycles, and the frequency band that the SRS that is sent within least one period of any antenna is covered is different, and the period is four continuous hop periods；And in each hop period, the frequency range that the SRS sent in each frequency hopping subcycle takes is different, and in each hop period, the frequency range that the SRS that all frequency hopping subcycles are sent takes is the coverage.

Description

SRS (sounding reference Signal) sending and receiving method and device

Technical Field

The present invention relates to the field of communications, and in particular, to a method for transmitting sounding reference signals SRS.

Background

In a 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution)/LTE-a (LTE-advanced) system, an OFDMA (Orthogonal Frequency Division Multiple Access) method is generally adopted as a downlink Multiple Access method. The downlink resources of the system are divided into OFDM (Orthogonal Frequency Division Multiple access) symbols in terms of time and subcarriers in terms of Frequency.

According to the LTE Release 8/9/10 standard, a normal uplink subframe includes two slots (slots), each slot has 7 OFDM symbols, and a normal downlink subframe includes 14 symbols, and defines the size of an RB (Physical Resource Block), which may also be referred to as a PRB. One RB includes 12 subcarriers in the frequency domain, and a half subframe duration (one slot) in the time domain, that is, includes 7 symbols, where a normal CP (Cyclic Prefix) length symbol is 7 OFDM symbols, and an extended Cyclic Prefix length symbol is 6 OFDM symbols. A certain subcarrier within a certain OFDM symbol is called RE (Resource Element), and thus one RB contains 84 or 72 REs. On one subframe, a pair of RBs of two slots is called a resource block pair, i.e., an RB pair (RB pair). When transmitting uplink data, the 4 th symbol of the 7 symbols of one slot is an uplink demodulation pilot. And in addition, data is carried on the symbols.

In addition, the LTE system introduces multiple-Input and multiple-Output (MIMO) key transmission technologies, which significantly increases the spectrum efficiency and data transmission rate. Through the transmission precoding technique and the reception combining technique, the MIMO-based wireless communication system can obtain diversity and array gain. The MIMO-based wireless communication system needs to perform precoding processing on signals, and a signal transmission function based on precoding can be expressed as:

the method comprises the steps that y is a received signal vector, H is a channel model matrix which is a pre-coding matrix, s is a transmitted signal vector, n is measurement noise, the transmitted signal vector s is pre-coded through the pre-coding matrix at a transmitting end to obtain a pre-coded matrix, and the received signal vector is received at a receiving end through superposition of the channel model matrix H and the measurement noise n.

The model of the channel needs to be determined before the system can perform subsequent data communications. Because the channels have the mutual difference, when determining the downlink/uplink channel model matrix H₁Then, the corresponding channel uplink/downlink channel model matrix H₁' can be expressed as:

therefore, the quality of the channel can be obtained no matter the uplink channel model or the downlink channel model matrix is measured. One method is that a User Equipment (UE) transmits a Sounding Reference Signal (SRS) to an Evolved Node B (eNB). And the eNB completes the measurement of the SRS and acquires an uplink channel model matrix.

However, when the UE has 2 antennas, only 2 antennas may transmit SRS to the eNB; however, current commercial terminal devices or user equipments already support 4 antennas. However, the case of 4-antenna SRS transmission has not been defined. And if the SRS is transmitted to the eNB using 2 antennas and the SRS is transmitted to the eNB using 4 antennas, the eNB cannot obtain a channel between the transmit and receive antennas, which results in a large performance loss.

Disclosure of Invention

The embodiment of the invention provides a Sounding Reference Signal (SRS) sending method, user equipment and a base station, solves the problem that the SRS sent by 4 antennas cannot be sent in a traditional mode, and improves the performance of a system.

In a first aspect, an embodiment of the present invention provides a method for sending a sounding reference signal SRS, where a user equipment UE determines a coverage area for sending the SRS; the UE transmits an SRS to a base station eNB by using one antenna in four antennas in a frequency hopping sub-period; one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.

In a first possible implementation manner of the first aspect, the SRS transmitted by any one antenna of the UE covers a coverage area of the SRS in the four consecutive hopping periods.

In a second possible implementation manner of the first aspect, in the four consecutive frequency hopping periods, the frequency width transmitted by the ith frequency hopping sub-period of each frequency hopping period is the same, where i is any positive integer.

In a third possible implementation manner of the first aspect, the number of frequency hopping sub-periods included in the one frequency hopping period is K;

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod4；

wherein β is a constant, β is 1 when K is an integer multiple of 8,6,10,18, β is 0 when K is not an integer multiple of 8,6,10,18, mod is a modulo sign, γ is a constant, γ is 0 when K is an integer multiple of 6,10,18, and γ is 1 when K is not an integer multiple of 6,10, 18.

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

the β is 1 when the K is an integer multiple of 8 or 6,10 or 18, the β is 0 when the K is not an integer multiple of 8 and is not 6,10 or 18, wherein gamma is a constant, 0 when the K is 6,10 or 18, and 1 when the K is not 6,10 or 18.

Or;

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSA relationship satisfying, when the value of K is an integer multiple of 4:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integral multiple of 4, the following conditions are satisfied:

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSWhen the value of K is an integer multiple of 4, or K is 2, the following relationship is satisfied:

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

in a second aspect, an embodiment of the present invention provides a method for sending a sounding reference signal SRS, where: the method comprises the steps that User Equipment (UE) determines a frequency hopping sub-period; and the UE transmits SRS to a base station eNB by using 2 antennas in the 4 antennas in at least one frequency hopping sub-period.

In a first possible implementation manner of the second aspect, the transmitting, by 2 of the 4 antennas, the SRS to the base station eNB specifically includes:

transmitting, by 2 antennas of the 4 antennas, an SRS to the eNB in at least one hopping sub-period; and transmitting an SRS to the eNB by the other 2 antennas of the 4 antennas in at least another hopping sub-period.

With reference to the second aspect, or the first possible implementation manner of the second aspect, in a second possible implementation manner, the transmitting, by 2 antennas of the 4 antennas, the SRS to the base station eNB specifically includes:

transmitting, by 2 antennas of the 4 antennas, an SRS to the eNB within a kth frequency hopping sub-period;

and in the (k + 1) th frequency hopping sub-period and/or in the (k-1) th frequency hopping sub-period, the other 2 antennas in the 4 antennas transmit SRS to the eNB.

With reference to the second aspect or the first possible implementation manner of the second aspect, in a third possible implementation manner, the sending, to the base station eNB, the SRS by 2 of the 4 antennas specifically includes:

the UE determines the number K of times of sending SRS signals in the frequency hopping period;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSRelation, satisfy

(ii) a And/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies: a (n)_SRS)＝n_SRS mod2；

Wherein the value is constant, the value of β is 1 when the value of K is an integer multiple of 4, the value of β is 0 when the value of K is not an integer multiple of 4, the mod is a modulo sign, and each of a (n) is a modulo sign_SRS) One value of (a) corresponds to one antenna group, said (n)_SRS) For indication at the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period.

With reference to the third possible implementation manner of the second aspect, in a fourth possible implementation manner, a (n) is_SRS) The two values of (a) correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of the other 2 out of 4 antennas, respectively.

With reference to the fourth possible implementation manner of the second aspect, in a fifth possible implementation manner, the method further includes;

the UE determines that an antenna corresponding to a first element A and an antenna corresponding to a third element C are the first antenna combination;

the UE uses an antenna corresponding to a second element B and an antenna corresponding to a fourth element D as the second antenna combination;

the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.

In a third aspect, an embodiment of the present invention provides a method for receiving a sounding reference signal SRS:

the base station eNB determines the coverage range of the received SRS; the eNB receives an SRS sent by user equipment UE by using one antenna in four antennas in a frequency hopping sub-period; the method comprises the steps that one frequency hopping period comprises at least two frequency hopping sub-periods, in at least one time period, the frequency bands covered by the received SRS sent by any one antenna are different, and the time period is four continuous frequency hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.

In a first possible implementation manner of the third aspect, the SRS transmitted by any one antenna received by the eNB covers the coverage of the SRS in the four consecutive frequency hopping periods.

In a second possible implementation manner of the third aspect, in the four consecutive frequency hopping periods, the frequency width of the ith frequency hopping sub-period received in each frequency hopping period is the same, where i is any positive integer.

In a third possible implementation manner of the third aspect, the number of frequency hopping sub-periods included in the one frequency hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

in a fourth aspect, an embodiment of the present invention provides a method for receiving a sounding reference signal SRS, where a base station eNB determines a frequency hopping sub-period; and the eNB receives the SRS sent by the UE by using 2 antennas in 4 antennas in at least one frequency hopping sub-period.

In a first possible implementation manner of the fourth aspect, the receiving the SRS that is transmitted by the UE using 2 antennas of the 4 antennas specifically includes: receiving 2 antennas of the 4 antennas to transmit SRS to the eNB in at least one frequency hopping sub-period; and receiving the other 2 antennas of the 4 antennas to transmit the SRS to the eNB in at least another frequency hopping sub-period.

With reference to the fourth aspect, or the first possible implementation manner of the fourth aspect, in a second possible implementation manner, the receiving, by the eNB, the SRS transmitted by the UE using 2 antennas of the 4 antennas specifically includes: in a kth frequency hopping sub-period, the eNB receives the SRS sent by 2 antennas of the 4 antennas to the eNB; and in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period, the eNB receives the other 2 antennas of the 4 antennas and transmits SRS to the eNB.

With reference to the fourth aspect or the first possible implementation manner of the fourth aspect, in a third possible implementation manner, the receiving, by the eNB, the SRS transmitted by the UE using 2 antennas of the 4 antennas specifically includes: the eNB determines the number K of times of receiving SRS signals in the frequency hopping period;

when K is an even number, the eNB receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

(ii) a And/or

When K is an odd number, the eNB receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies: a (n)_SRS)＝n_SRSmod2；

Wherein the β is a constant and the value of β is 1 when the value of K is an integer multiple of 4, the value of β is 0 when the value of K is not an integer multiple of 4, the mod is a modulo sign, and each of the a (n) s_SRS) One value of (a) corresponds to one antenna combination for indicating in the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period.

With reference to the second possible implementation manner of the fourth aspect, in a fourth possible implementation manner, a (n) is defined as_SRS) The two values of (a) correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of the other 2 out of 4 antennas, respectively.

With reference to any one of the first to fourth possible implementation manners of the fourth aspect, in a fifth possible implementation manner, the method further includes; the eNB determines that an antenna corresponding to a first element A and an antenna corresponding to a third element C are the first antenna combination; the eNB determines that an antenna corresponding to a second element B and an antenna corresponding to a fourth element D are the second antenna combination; the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.

In a fifth aspect, an embodiment of the present invention provides a user equipment UE, where: a determining unit, configured to determine a coverage area for transmitting the SRS; a transmitting unit, configured to transmit, to a base station eNB, one SRS using one of four antennas in one hopping sub-period; one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.

In a first possible implementation manner of the fifth aspect, the transmitting unit covers a coverage area of the SRS, which is transmitted by using any one antenna, in the four consecutive hopping periods.

In a second possible implementation manner of the fifth aspect, the frequency width transmitted by the transmitting unit in the ith hop sub-period of each hop period in the four consecutive hop periods is the same, where i is any positive integer.

In a third possible implementation manner of the fifth aspect, the number of frequency hopping sub-periods included in the one frequency hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relationship is such that,satisfies the following conditions:

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSRelation when said value of KWhen the number is 4 integral multiples, the following conditions are satisfied:

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

in a sixth aspect, an embodiment of the present invention provides a user equipment UE, including a determining unit, configured to determine a frequency hopping sub-period; and a transmitting unit, configured to transmit, to the base station eNB, an SRS using 2 antennas of the 4 antennas in at least one of the hopping sub-periods.

In a first possible implementation manner of the sixth aspect, the transmitting unit transmits the SRS to the base station eNB by using 2 of the 4 antennas, and specifically includes: the transmitting unit transmits an SRS to the eNB using 2 antennas of the 4 antennas in at least one hopping sub-period; and the transmitting unit transmits the SRS to the eNB using the other 2 antennas of the 4 antennas in at least another hopping sub-period.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a second possible implementation manner, the sending unit sends the SRS to the base station eNB by using 2 antennas of the 4 antennas, and specifically includes: in a kth frequency hopping sub-period, the transmitting unit transmits an SRS to the eNB using 2 antennas of the 4 antennas; and in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period, the transmitting unit transmits the SRS to the eNB by using the other 2 antennas in the 4 antennas.

With reference to the sixth aspect or the first possible implementation manner of the sixth aspect, in a third possible implementation manner, the sending unit sends, to the base station eNB, the SRS using 2 of the 4 antennas, and specifically includes:

the determining unit is further configured to determine a number K of times that the SRS signal is transmitted in the one hopping period;

when K is an even number, the transmitting unit transmits the nth number to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the transmitting unit transmits the nth signal to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod2；

wherein β is constant, the value of β is 1 when the value of K is an integer multiple of 4, the value of β is 0 when the value of K is not an integer multiple of 4, mod is a modulo symbol, and each of the values corresponds to an antenna group, a (n) is a symbol_SRS) For indication at the n-th_SRSA frequency hopping sub-periodAnd transmitting the SRS by the antenna in the period.

With reference to the third possible implementation manner of the sixth aspect, in a fourth possible implementation manner, the a (n) is_SRS) The two values of (a) correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of the other 2 out of 4 antennas, respectively.

With reference to any one of the first to fourth possible implementation manners of the sixth aspect, in a fifth possible implementation manner, the method further includes; the determining unit is further configured to determine that an antenna corresponding to a first element a and an antenna corresponding to the third element C are the first antenna combination; the determining unit is further configured to determine that an antenna corresponding to a second element B and an antenna corresponding to the fourth element D are the second antenna combination; the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.

In a seventh aspect, an embodiment of the present invention provides a base station apparatus, including: a determining unit, configured to determine a coverage area of the received SRS; a receiving unit, configured to receive, in a frequency hopping sub-period, an SRS that is transmitted by a user equipment UE using one of four antennas; the method comprises the steps that one frequency hopping period comprises at least two frequency hopping sub-periods, in at least one time period, the frequency bands covered by the received SRS sent by any one antenna are different, and the time period is four continuous frequency hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.

In a first possible implementation manner of the seventh aspect, the receiving unit receives a coverage area of the SRS covered by the SRS transmitted by any one antenna.

In a second possible implementation manner of the seventh aspect, the receiving unit receives the ith hop sub-period in each hop period in the four consecutive hop periods with the same frequency width, where i is any positive integer.

In a third possible implementation manner of the seventh aspect, the number of frequency hopping sub-periods included in the one frequency hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

in an eighth aspect, an embodiment of the present invention provides a base station apparatus, including: a determining unit, configured to determine a hopping sub-period; a receiving unit, configured to receive, in at least one of the frequency hopping sub-periods, an SRS that is transmitted by the UE using 2 of the 4 antennas.

In a first possible implementation manner of the eighth aspect, the receiving the SRS that is transmitted by the UE using 2 antennas of the 4 antennas specifically includes: receiving 2 antennas of the 4 antennas to transmit SRS to the eNB in at least one frequency hopping sub-period; and receiving the other 2 antennas of the 4 antennas to transmit the SRS to the eNB in at least another frequency hopping sub-period.

With reference to the eighth aspect or the first possible implementation manner of the eighth aspect, in a second possible implementation manner, the receiving unit receives an SRS that is sent by the UE using 2 antennas of the 4 antennas, and specifically includes:

in a kth frequency hopping sub-period, the receiving unit receives the SRS transmitted by 2 of the 4 antennas to the eNB;

and the receiving unit receives the other 2 antennas of the 4 antennas to transmit the SRS to the eNB in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period.

With reference to the eighth aspect or the first possible implementation manner of the eighth aspect, in a third possible implementation manner, the receiving unit receives an SRS that is sent by the UE using 2 antennas of the 4 antennas, and specifically includes:

the determining unit is further configured to determine a number K of times that the SRS signal is received in the one frequency hopping period;

when K is even number, the receiving unit receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd number, the receiving unit receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod2；

With reference to the third possible implementation manner of the eighth aspect, in a fourth possible implementation manner, the a (n) is_SRS) The two values of (a) correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of the other 2 out of 4 antennas, respectively.

With reference to any one of the first to fourth possible implementation manners of the eighth aspect, in a fifth possible implementation manner, the method further includes;

the determining unit is further configured to determine that an antenna corresponding to a first element a and an antenna corresponding to the third element C are the first antenna combination;

the determining unit is further configured to determine that an antenna corresponding to a second element B and an antenna corresponding to the fourth element D are the second antenna combination;

Through the scheme, the embodiment of the invention improves the speed of acquiring the channel information by the system and improves the system performance by determining the mode that the SRS is transmitted by adopting different antennas in the determined period and each antenna completes the coverage in the coverage range in a plurality of periods.

Drawings

Fig. 1 is a flowchart of a method for transmitting an SRS by a user equipment UE according to an embodiment of the present invention.

Fig. 2 is a flowchart of a method for transmitting an SRS by a user equipment UE according to an embodiment of the present invention.

Fig. 3 is a flowchart of a method for transmitting an SRS by a user equipment UE according to an embodiment of the present invention.

Fig. 4 is a flowchart of a method for receiving an SRS by a base station eNB according to an embodiment of the present invention.

Fig. 5 is a flowchart of a method for receiving an SRS by a base station eNB according to an embodiment of the present invention.

Fig. 6 is a flowchart of a method for receiving an SRS by a base station eNB according to an embodiment of the present invention.

Fig. 7 is a flowchart of a method for a user equipment UE and a base station eNB to receive and transmit an SRS according to an embodiment of the present invention.

Fig. 8 is a timing diagram illustrating SRS transmission and reception between a user equipment UE and a base station eNB according to an embodiment of the present invention.

Fig. 9 is a device structure diagram of a user equipment UE according to an embodiment of the present invention.

Fig. 10 is a device structure diagram of a user equipment UE according to an embodiment of the present invention.

Fig. 11 is a device structure diagram of a user equipment UE according to an embodiment of the present invention.

Fig. 12 is a diagram illustrating an apparatus structure of a base station eNB according to an embodiment of the present invention.

Fig. 13 is a diagram illustrating an apparatus structure of a base station eNB according to an embodiment of the present invention.

Fig. 14 is a diagram illustrating an apparatus structure of a base station eNB 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 below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

It should be understood that the Base station related to the present invention may be, but is not limited to, a Node B (nodeb), a Base Station (BS), an Access Point (Access Point), a Transmission Point (TP), an Evolved Node B (Evolved Node B, eNB), a Relay (Relay), or the like; the user equipment UE according to the present invention may include, but is not limited to, a Mobile Station (MS), a Relay (Relay), a Mobile phone (Mobile Telephone), a Mobile phone (handset), a portable device (portable equipment), a Mobile terminal, a non-Mobile terminal, and the like.

Fig. 1 is a schematic flow chart of a communication method according to an embodiment of the present invention, and relates to a method for transmitting a sounding reference signal SRS:

step 101, User Equipment (UE) determines the coverage area of sending SRS;

102, the UE transmits an SRS to a base station eNB by using one of four antennas in a frequency hopping sub-period;

one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.

According to the embodiment shown in fig. 1, in the process of sending the SRS to the base station by the UE, because the frequency ranges occupied by the SRS sent in each frequency hopping sub-period are different, the coverage of the SRS can be quickly covered in the frequency hopping process, and the channel characteristics can be obtained at the early stage of the frequency hopping process, thereby improving the system efficiency.

Fig. 2 is a schematic flow chart of a communication method according to an embodiment of the present invention, and relates to a method for sending a sounding reference signal SRS:

step 201, a user equipment UE determines a coverage area of sending an SRS;

it should be understood that in the case of UE transmitting SRS, it is transmitted by using one of the 4 antennas at a time, however, due to the bandwidth limitation and the requirement of improving efficiency, the UE generally needs to determine the coverage of one SRS in the full frequency band, i.e. the range that the UE cannot exceed by transmitting SRS signals from the SRS to the eNB multiple times. This range may be an overall range. For example, the range may be determined according to the value of the uplink bandwidth, may select a part of the uplink bandwidth or the whole uplink bandwidth, or may be determined according to a specific service requirement. From the time point, this determination may be static, semi-static or dynamic scheduling control, or determined by the UE itself, or determined by the eNB scheduling the UE. The specific frequency hopping mode may be determined by the base station and then sent to the UE, or obtained through negotiation between the base station and the UE.

Step 202, the UE transmits an SRS to a base station eNB by using one of four antennas in a frequency hopping sub-period; one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.

In the process of sending the SRS signal, the UE may perform frequency hopping (hopping), that is, within a certain coverage range, the UE may perform switching of the frequency band position where the SRS is located in two adjacent time intervals. This conversion rule may be done according to a particular manner. For example, the rule may be a hop period, in which n hop sub-periods are included. Optionally, n is an integer greater than or equal to 2. In each frequency hopping sub-period, the UE transmits an SRS to a base station using one antenna of 4 antennas. At the end of the n hopping sub-periods, the UE transmits SRS signals covering the entire coverage area. In an embodiment, the value of n may be associated with the number of nodes in a frequency hopping process, where a node may refer to a frequency band bandwidth, i.e., a frequency band position, of an SRS transmitted by a UE at a time, and the number of nodes may refer to a width of a node included in one coverage area in a frequency hopping process. For example, in table 1, when it is determined that the coverage is 6PRB-40PRB, if the value of n is 9, the number of nodes may be 9, and the frequency band covered by the SRS transmitted by any one antenna in at least one time slot is different:

TABLE 1

In Table I, 6-10 represents the 6 th PRB through the 10 th PRB. In the relationship between the number of nodes and the coverage shown in table 1, when 9 frequency hopping sub-periods end, the UE covers 1 node per sub-period, and the coverage of the entire coverage is completed. It should be understood that the order of the particular overlay nodes may not be done according to the order of 1-9. In one embodiment, this process may be to subdivide the 9 nodes into m groups, with adjacent hopping sub-periods, using nodes in different groups. In a specific implementation, the number of nodes or the number of nodes may not be determined according to the number.

In another embodiment, the coverage of the SRS transmitted by any one of the antennas is different in at least one time period, for example, the kth antenna, during which a plurality of SRSs are transmitted to the eNB,

the frequency ranges covered by these SRS signals are different, and further explained, for example, the SRS signals are transmitted in the s-th and t-th hopping sub-periods, and when the SRS signals transmitted in the s-th hopping sub-period cover the 10 th PRB-14PRB, the 10 th PRB-14PRB can not be covered repeatedly in the t-th hopping sub-period. Where k may refer to a particular one of the antennas. It will be appreciated that there may be certain frequency band locations where coverage overlaps, in which case the number of hop sub-periods contained in a hop period may be greater than the number of nodes.

The UE needs to determine the transmission mode of the antenna in addition to the frequency hopping mode. In order to improve efficiency to the maximum extent, the frequency band covered by the SRS transmitted by any antenna may be different in four consecutive hopping periods. This frequency hopping process may begin at the beginning of the system Sounding (Sounding) process, i.e., at the beginning of the line. In such a case, the four antennas may each be enabled to traverse the entire coverage area directly during the first four consecutive hop periods.

In one embodiment, the UE may further satisfy: in one frequency hopping period, the number of times that any one antenna transmits the SRS is less than or equal to, which means rounding-down, and means rounding-up. In this case, the UE may transmit the SRS on as many antennas as possible for the first several hopping periods, so that the eNB may quickly obtain SRS conditions for different antennas.

In another embodiment, the frequency width transmitted by the ith hop sub-period of each hop period in the four consecutive hop periods by the UE is the same, where i is any positive integer. It should be understood that any positive integer in the present invention may refer to any positive integer within the range, for example, j hopping sub-periods included in the hopping period are provided, and then, i takes on a value of 1-j. For example, in the 2 nd hop sub-period of the first hop period, the frequency width of the transmission is from the 6 th PRB to the 40 th PRB, and in the 2 nd hop sub-period of the second, third, and fourth hop periods, the frequency width of the transmission is from the 6 th PRB to the 40 th PRB. In this case, the eNB may determine, according to SRSs of different hopping periods and the same frequency width, channel estimates corresponding to different antennas transmitting the same frequency width. The frequency width herein may refer to the number of PRBs, for example, 11-14 PRBs cover 4 PRBs, and the frequency width is 4 PRBs.

In another embodiment, the number of hop sub-periods included in one hop period is K;

and/or

a(n_SRS)＝n_SRS mod4；

wherein β is constant, β has a value of 1 when K is an integer multiple of 4, β has a value of 0 when K is not an integer multiple of 4, and mod is a modulo sign.

In yet another embodiment of the present invention,

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

. It should be understood that,the formula in the present invention can be usually represented by a set of mapping relationships or a table, for example, a corresponding relationship, for example, in this embodiment, in the nth transmission_SRSAt or before transmission of an SRS according to a correspondence n_SRSDetermines the antenna number a (n) of transmission_SRS) It should be understood that, in the present embodiment, the value of the number may be 0,1,2,3, and such a value is only one example, a (n) is_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

Optionally, before the UE sends the SRS to the base station, the method may further include determining a frequency hopping period and/or a frequency hopping sub-period, where the method may be that the eNB issues a message to indicate the frequency hopping period/frequency hopping sub-period, and of course, the frequency hopping period and/or frequency hopping sub-period may be preset in the UE.

It should be understood that, in order for the eNB to acquire the channel conditions of all 4 antennas in the coverage area, it is preferable that the SRS transmitted by any one antenna of the UE covers the coverage area of the SRS in the four consecutive hopping periods. For example, in the receiving method described in the above embodiment, any pth antenna transmits an SRS in 4 periods to cover the coverage area.

According to the embodiment shown in fig. 2, in the process of sending the SRS to the base station by the UE, since the frequency ranges occupied by the SRS sent in each frequency hopping sub-period are different, the coverage of the SRS can be quickly covered in the frequency hopping process, and the channel characteristics can be obtained at the early stage of the frequency hopping process, thereby improving the system efficiency.

Fig. 3 is a schematic flow chart of a communication method according to an embodiment of the present invention, and relates to a method for transmitting a sounding reference signal SRS:

step 301, a user equipment UE determines a frequency hopping sub-period;

in the case that the UE transmits the SRS, a hopping sub-period may be determined, which is a time taken for the UE to transmit the SRS once. The determining process may receive a base station indication signaling before initializing or performing subsequent steps again, where the indication signaling includes the frequency hopping sub-period, or may be a parameter with a preset value in the UE.

Step 302, the UE transmits SRS to the base station eNB using 2 antennas of the 4 antennas in at least one of the hopping sub-periods.

In the process of sending the SRS by the UE, the efficiency of the Sounding (Sounding) process, that is, the efficiency of sending the SRS, can be improved by using two antennas. However, it is necessary to determine the selection of the antenna according to actual conditions so as not to repeat transmission to affect efficiency. In one embodiment, 2 antennas of the 4 antennas transmit SRS to the eNB in at least one hopping sub-period; and transmitting an SRS to the eNB by the other 2 antennas of the 4 antennas in at least another hopping sub-period.

In yet another embodiment, 2 of the 4 antennas transmit SRS to the eNB in a kth frequency hopping sub-period; and in the (k + 1) th frequency hopping sub-period and/or in the (k-1) th frequency hopping sub-period, the other 2 antennas in the 4 antennas transmit SRS to the eNB. It should be appreciated that in transmitting the SRS to the eNB using 2 antennas, the selection of antennas may be done in an alternating manner, e.g., the UE uses the 1 st group of antennas in the first hop sub-period and the UE uses the 2 nd group of antennas in the second hop sub-period. Thus, the influence of the reuse of one antenna on the transmission efficiency can be avoided.

In another embodiment, the UE determines the number K of times the SRS signal is transmitted in the one hopping period; when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSAn SRNumber a (n) of antenna group where S is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod2；

wherein the β is a constant and the value of β is 1 when the value of K is an integer multiple of 4, the value of β is 0 when the value of K is not an integer multiple of 4, the mod is a modulo sign, and each of the a (n) s_SRS) One value of (a) corresponds to one antenna group, said (n)_SRS) For indication at the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period. In this embodiment, K of the number K of times of transmitting SRS signals represents that 1 SRS signal is transmitted in one hop sub-period, and the SRS signals are transmitted from two antennas.

It should be understood that the formula in the present invention can be generally represented by a set of mapping relationships or a table, for example, a mapping relationship can be a corresponding relationship, for example, in this embodiment, the nth transmission_SRSAt or before transmission of an SRS according to a correspondence n_SRSDetermines the antenna number a (n) of transmission_SRS) It should be understood that in the present embodiment, the value of the number may be 0,1, and such a value manner is only an example, and the present invention claims protection of a (n) due to the deformation of the formula_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

In one embodiment, the UE determines that an antenna corresponding to a first element a and an antenna corresponding to the third element C are the first antenna combination; the UE uses an antenna corresponding to a second element B and an antenna corresponding to a fourth element D as the second antenna combination; the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.

In one embodiment, since different channel characteristics are considered, when the UE-selectable precoding matrix includes a precoding matrix with non-zero element of 2, for example:

TABLE 2

In table 2, the precoding matrix of the first behavior indicates that the precoding matrix of the second behavior corresponds to the element in the codebook, and the grouping manner of the antennas, such as the precoding matrix corresponding to the structure of indexes 16 to 19, can be determined according to the codebook form of the precoding matrix, and the values of the first element and the third element are non-zero; the second and fourth element values are non-zero, as are the precoding matrices corresponding to the structure of indices 20-23. If the first element and the third element correspond to an antenna 0 and an antenna 2, and the second element and the fourth element correspond to an antenna 1 and an antenna 3; then, after the UE has transmitted the SRS to the eNB, the eNB may obtain channel estimates of corresponding groups of antennas, so as to further improve system efficiency.

In one embodiment, when the precoding matrix set includes two or more precoding matrices, 2 of the 4 antennas are determined to be antennas corresponding to a first element and a third element in the precoding matrix; and determining the antenna corresponding to the second element and the antenna corresponding to the fourth element in the precoding matrix as the other 2 of the 4 antennas.

Or, the precoding matrix with the number of the non-zero elements being 2 is a matrix with a structure of or; the UE determines the 2 antennas according to the precoding matrix whose number of the non-zero elements is 2, and may further include: when the precoding matrix structure is as, determine the A₁And said A₂The corresponding antennas are two antennas in the 4 antennas; or when the precoding matrix structure is as follows, determining the B₁And said B₂The corresponding antennas are two antennas of the 4 antennas.

According to the embodiment of the invention, the UE determines a frequency hopping sub-period and transmits SRS to the base station eNB by using 2 antennas in the 4 antennas in at least one frequency hopping sub-period. In a specific sending process, grouping can be performed according to the antennas, and proper antennas are used for grouping in different frequency hopping sub-periods, so that the SRS sending process can be completed quickly, and the system efficiency is improved.

Fig. 4 is a schematic flow chart of a communication method according to an embodiment of the present invention, and relates to a method for receiving sounding reference signals, SRS:

step 401, a base station eNB determines a coverage area for receiving an SRS;

step 402, the eNB receives an SRS transmitted by a user equipment UE using one of four antennas in a frequency hopping sub-period;

the method comprises the steps that one frequency hopping period comprises at least two frequency hopping sub-periods, in at least one time period, the frequency bands covered by the received SRS sent by any one antenna are different, and the time period is four continuous frequency hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.

According to the embodiment shown in fig. 4, in the process that the base station receives the SRS sent by the UE, because the frequency ranges occupied by the SRS sent in each frequency hopping sub-period are different, the coverage of the SRS can be quickly covered in the frequency hopping process, and the channel characteristics can be obtained at the early stage of the frequency hopping process, thereby improving the system efficiency.

Fig. 5 is a schematic flow chart of a communication method according to an embodiment of the present invention, relating to a method for transmitting sounding reference signals, SRSs:

step 501, a base station eNB determines the coverage area of a received SRS;

it should be understood that in the case that the eNB receives the SRS transmitted by the UE, the SRS is transmitted by using one of the 4 antennas at a time, but due to the bandwidth limitation and the requirement for improved efficiency, the eNB generally needs to determine the coverage of one SRS in the full frequency band, so that the UE transmits the SRS to a range that cannot be exceeded by the SRS signal of the eNB multiple times. This range may be an overall range. For example, the range may be determined according to the value of the uplink bandwidth, may select a part of the uplink bandwidth or the whole uplink bandwidth, or may be determined according to a specific service requirement. From the time perspective, this determination may be static, semi-static, or dynamically determined, or may be determined by the eNB by signaling the UE. The specific frequency hopping mode may be determined by the eNB and then sent to the UE, or obtained through negotiation between the eNB and the UE.

Step 502, the eNB receives, in a frequency hopping sub-period, an SRS transmitted by a user equipment UE using one of four antennas; the method comprises the steps that one frequency hopping period comprises at least two frequency hopping sub-periods, in at least one time period, the frequency bands covered by the received SRS sent by any one antenna are different, and the time period is four continuous frequency hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.

In the process of receiving the SRS signal, the eNB may receive the SRS transmitted by the UE in a frequency hopping (hopping) manner, that is, in a certain coverage range, the eNB switches the frequency band location where the SRS is located in two adjacent time intervals. This conversion rule can be implemented in a particular manner.

Due to the hopping mode, the eNB needs to determine the frequency at which the SRS transmitted by the UE is received. The present invention is not particularly limited to this determination method, and the eNB may know directly from the received signal, or through negotiation or predetermined determination, and after the eNB notifies the UE through one signaling, the eNB receives the SRS signal transmitted by the UE in the predetermined frequency hopping sub-period and according to the predetermined frequency range. In each frequency hopping sub-period, the eNB receives an SRS transmitted by the UE to the eNB using one antenna of the 4 antennas. For example, the rule may be a hop period, in which n hop sub-periods are included. Optionally, n is an integer greater than or equal to 2. At the end of the n hopping sub-periods, the SRS signal received by the eNB covers the entire coverage. In an embodiment, the value of n may be associated with the number of nodes in a frequency hopping process, where a node may refer to a frequency band bandwidth, i.e., a frequency band position, where an eNB receives an SRS transmitted by a UE at a time, and the number of nodes may refer to a width of a node included in one coverage area in a frequency hopping process. For example, in table 3, when it is determined that the coverage is 6PRB-40PRB, if the value of n is 9, the number of nodes may be 9, and the frequency band covered by the SRS transmitted by any antenna in at least one time slot is different:

TABLE 3

In the relationship between the number of nodes and the coverage shown in table 3, when 9 frequency hopping sub-periods end, the eNB receives the SRS transmitted by the UE, so that the coverage of the entire coverage is completed in a manner that each sub-period covers 1 node. It should be understood that the order of the particular overlay nodes may not be done according to the order of 1-9. In one embodiment, this process may be to subdivide the 9 nodes into m groups, with adjacent hopping sub-periods, using nodes in different groups. In a specific implementation, the number of nodes or the number of nodes may not be determined according to the number.

In another embodiment, the eNB receives SRS signals transmitted by any one antenna in different frequency bands in at least one time period, for example, the kth antenna, and in this time period, several SRS signals are received, and the frequency bands covered by the several SRS signals are different. To explain further, for example, when the SRS is received in the s-th and t-th hopping sub-periods, the 10-th PRB-14PRB cannot be repeatedly covered in the t-th hopping sub-period when the 10-th PRB-14PRB is covered by the SRS received in the s-th hopping sub-period. Where k may refer to a particular one of the antennas. It will be appreciated that there may be certain frequency band locations where coverage overlaps, in which case the number of hop sub-periods contained in a hop period may be greater than the number of nodes.

Besides determining the frequency hopping mode, the eNB also needs to determine the transmission mode of the UE antenna. In order to improve efficiency to the maximum extent, the frequency band covered by the SRS transmitted by any one of the received antennas may be different in four consecutive hopping periods. This frequency hopping process may begin at the beginning of the system Sounding (Sounding) process, i.e., at the beginning of the line. In such a case, the four antennas may each be enabled to traverse the entire coverage area directly during the first four consecutive hop periods.

In one embodiment, the eNB may receive the SRS transmitted by the UE and may further satisfy: in one frequency hopping period, the number of times that any antenna received by the eNB transmits the SRS is less than or equal to that, which means rounding-down, and means rounding-up. In such a case, the eNB may receive the SRS on as many antennas as possible in the first several hopping periods, so that the eNB may quickly obtain SRS conditions for different antennas.

In another embodiment, the eNB receives the UE in the four consecutive frequency hopping periods, where the frequency width received in the ith frequency hopping sub-period of each frequency hopping period is the same, and i is any positive integer. For example, in the 2 nd hop sub-period of the first hop period, the received frequency width is 20 th PRB to 25 th PRB, and in the 2 nd hop sub-period of the second, third, and fourth hop periods, the transmitted frequency width is 20 th PRB to 25 th PRB. In this case, the eNB may determine, according to SRSs of different hopping periods and the same frequency width, channel estimates corresponding to different antennas transmitting the same frequency width.

and/or

a(n_SRS)＝n_SRS mod4；

In yet another embodiment of the present invention,

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

it should be understood that the formulae of the present invention are generallyMay be represented in the form of a set of mapping relationships or a table, for example, a corresponding relationship, for example, in this embodiment, in the receiving of the nth_SRSWhen the SRS is received, the nth_SRSAfter or before reception of an SRS, according to a correspondence n_SRSDetermines the received antenna number a (n)_SRS) It should be understood that, in the present embodiment, the value of the number may be 0,1,2,3, and such a value is merely an example, a (n) is_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

Optionally, before the eNB receives the SRS sent by the UE, the eNB may further determine a frequency hopping period and/or a frequency hopping sub-period, where this manner may be that the eNB issues a message to indicate the frequency hopping period/frequency hopping sub-period, and of course, this frequency hopping period and/or frequency hopping sub-period may be preset in the eNB or the UE.

It should be understood that, in order for the eNB to acquire the channel conditions of all 4 antennas in the coverage area, it is preferable that the SRS transmitted by any one antenna received by the eNB covers the coverage area of the SRS in the four consecutive hopping periods. For example, in the receiving method described in the above embodiment, any pth antenna transmits an SRS in 4 periods to cover the coverage area.

According to the embodiment shown in fig. 3, in the process of receiving the SRS by the eNB, because the SRS received in each frequency hopping sub-period occupies different frequency ranges, the coverage of the SRS can be quickly covered in the frequency hopping process, and the characteristics of a channel can be obtained in an early stage of the frequency hopping process, so as to perform initial estimation on a channel matrix or a channel model, thereby improving the system efficiency.

Fig. 6 is a schematic flow chart of a communication method according to an embodiment of the present invention, relating to a method for transmitting sounding reference signals, SRSs:

601, a base station eNB determines a frequency hopping sub-period;

in case the eNB receives the SRS, the eNB may determine a hopping sub-period, which is a time taken by the UE to transmit the SRS once. The determining process may receive a base station indication signaling before initializing or performing subsequent steps again, where the indication signaling includes the frequency hopping sub-period, or may be a parameter with a preset value in the eNB or the UE.

Step 602, the eNB receives, in at least one of the hopping sub-periods, the SRS transmitted by the UE using 2 of the 4 antennas.

In the process of receiving the SRS by the eNB, the UE may be notified to transmit SRS signals using two antennas to complete a Sounding (Sounding) process, so as to improve the efficiency of receiving the SRS and estimating channel characteristics. However, it is necessary to determine the selection of the antenna according to actual conditions so as not to repeat transmission to affect efficiency. In one embodiment, in at least one frequency hopping sub-period, the eNB receives the SRS transmitted by 2 of the 4 antennas to the eNB; and in at least another frequency hopping sub-period, the eNB receives the SRS transmitted by the other 2 antennas of the 4 antennas to the eNB.

In yet another embodiment, the eNB receives 2 of the 4 antennas to transmit SRS to the eNB in the kth frequency hopping sub-period; and in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period, the eNB receives the other 2 antennas of the 4 antennas and transmits SRS to the eNB. It should be understood that in the process of transmitting the SRS to the eNB through the receive 2 antenna, the eNB may complete the receiving process in an alternating manner, for example, in the first hopping sub-period, the eNB receives the SRS transmitted by the UE through the 1 st group antenna, and in the second hopping sub-period, the eNB receives the SRS transmitted by the UE through the 2 nd group antenna. It should be understood that this rule may enable the eNB to determine itself and inform the UE to transmit according to the determined manner, so that it may be avoided that the UE reuses a certain antenna and thus affects the transmission efficiency.

In another embodiment, the eNB determines the number K of times the SRS signal is received in the one hopping period;

and/or

When K is an odd number, the eNB receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod2；

In this embodiment, one of the times K for receiving SRS signals represents that one SRS signal is transmitted in one hopping sub-period, and the SRS signals are transmitted from two antennas.

It should be understood that the formula in the present invention can be generally represented by a set of mapping relationships or a table, for example, a mapping relationship, for example, in this embodiment, the nth relationship is received_SRSAt or before reception of an SRS according to a correspondence n_SRSDetermines the antenna number a (n) of transmission_SRS) It should be understood that in the present embodiment, the value of the number may be 0,1, and such a value manner is only an example, and the present invention claims protection of a (n) due to the deformation of the formula_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

According to the embodiment of the invention, the base station determines a frequency hopping sub-period, and receives the SRS sent by the UE to the base station eNB by using 2 antennas in the 4 antennas in at least one frequency hopping sub-period. In a specific sending process, grouping can be performed according to the antennas, and proper antennas are used for grouping in different frequency hopping sub-periods, so that the SRS sending process can be completed quickly, and the system efficiency is improved.

Next, the procedures of transmitting SRS and receiving SRS according to the present invention will be described in detail with reference to specific examples.

Fig. 7 is a schematic flow chart of a communication method according to an embodiment of the present invention, relating to a method for transmitting/receiving sounding reference signals, SRS:

step 701, the eNB and the UE determine the coverage of the SRS transmission;

optionally, the base station determines a coverage area of the SRS, where the coverage area may be determined according to an uplink bandwidth, or may be acquired from other network devices. This determination may be to obtain or determine a bandwidth configuration, and then send the bandwidth configuration to the UE through signaling or configuration.

Step 702, the UE transmits an SRS to a base station eNB using one of four antennas in one frequency hopping sub-period; one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.

Optionally, before step 702, the eNB and the UE may determine the frequency band covered by the SRS transmitted by each antenna in at least one time period; the eNB and the UE can also determine that the bandwidth of the SRS is smaller than the coverage range, so as to further determine that the SRS transmitted by the UE needs to be transmitted in a frequency hopping mode. When the eNB and/or the UE determine that frequency hopping is required, step 702 is performed.

As an example of step 702, the uplink bandwidth determined by the eNB is 40-60MHz, and the frequency band range in which the eNB determines that hopping is required is 44-60MHz, it should be understood that 40-60MHz and 42-60MHz are just examples, and the frequency band range of hopping may be higher than, equal to, or lower than the uplink bandwidth. When the number of nodes is determined to be 4, the bandwidth determined by the one node may have a value of 4

Node point	1	2	3	4
Node point	1	2	3	4	Bandwidth (PRB)	44-48	48-52	52-56	56-70

TABLE 4

Further, the relationship between the frequency hopping sub-period and the coverage position may be embodied in the form shown in fig. 8. T in fig. 8 represents a hopping period, and T represents a hopping sub-period, wherein one of 801 includes a number box representing that an antenna of the UE transmits SRS at a certain node, and the number in the box represents the number of the antenna. The numbering here is according to the form 0,1,2,3, the invention is not limited to a specific numbering, and the 0,1,2,3 may be other types of indications, such as a, b, c, d or other binary codes. The indication and the specific order of transmission may be determined before the UE transmits, and the eNB receives the SRS transmitted by the determined antennas on the determined frequency band covered according to the determined order.

In another example, multiple mapping relationship tables of a node and a coverage area may be determined according to different uplink bandwidths:

TABLE 4a uplink bandWidth m_SRS,bAnd N_bValue of (b ═ 0,1,2,3)

TABLE 4b uplink Bandwidth m_SRS,bAnd N_bValue of (b ═ 0,1,2,3)

TABLE 4c uplink Bandwidth m_SRS,bAnd N_bValue of (b ═ 0,1,2,3)

TABLE 4d uplink Bandwidth m_SRS,bAnd N_bValue of (b ═ 0,1,2,3)

Tables 4a, 4b, 4c, and 4d show the relationship between the number of nodes and the number of bandwidths. For example, in the case of the uplink bandwidth, when the SRS bandwidth is configured to be 6, 48 PRBs need to be covered; if the UE is according to B_SRSSignal transmission when equal to 0, then N₀Is 1 time, namely directly covering the m_SRS,0Is 48PRB coverage; when the UE is according to B_SRSWhen 1 signal is transmitted, 2 hopping sub-periods are required to be transmitted, each hopping sub-period covering m_SRS,1Is 24PRB coverage; when the UE is according to B_SRSWhen 2 signals are transmitted, N is required to be transmitted₁N₂For 4 hopping sub-periods, each hopping sub-period covers m_SRS,2Is 12PRB coverage.

In one embodiment, the eNB and the UE determine an antenna transmission order, and the UE transmits the SRS to the eNB according to the antenna transmission order:

sequence number	1	2	3	4	5	6	7	8
sequence number	1	2	3	4	5	6	7	8	Serial number	0	1	2	3	1	2	3	0
Sequence number	9	10	11	12	13	14	15	16	Serial number	0	1	2	3	1	2	3	0
Sequence number	9	10	11	12	13	14	15	16	Serial number	2	3	0	1	3	0	1	2

TABLE 5

The sequence numbers in table 5 are time sequences, and the numbers may also start from 0, and the sequence numbers in the table are the numbers of the antennas; it should be understood that the numbering of this antenna may be other than 0,1,2,3, and may be any indication. This table may be stored in the UE or eNB for a mapping relationship, or scheduled by the UE, eNB, or other network-side device.

The eNB and the UE need to determine the transmission mode of the antenna in addition to the frequency hopping mode. In order to improve efficiency to the maximum extent, the frequency band covered by the SRS transmitted by any antenna may be different in four consecutive hopping periods. This frequency hopping process can begin at the beginning of the system in which the sounding process is performed. In such a case, the four antennas may each be enabled to traverse the entire coverage area directly during the first four consecutive hop periods.

In one embodiment, the UE may send the SRS to the eNB in 4 frequency hopping periods, and the specific sending manner may be that the UE uses the first antenna to send in all frequency hopping sub-periods of the first frequency hopping period; all frequency hopping sub-periods of the second frequency hopping period are sent by using a second antenna of the UE; all frequency hopping sub-periods of the third frequency hopping period are sent by using a third antenna of the UE; and all the frequency hopping sub-periods of the fourth frequency hopping period are transmitted by using the fourth antenna of the UE.

In another embodiment, the frequency width transmitted by the ith hop sub-period of each hop period in the four consecutive hop periods by the UE is the same, where i is any positive integer. For example, in the 2 nd hop sub-period of the first hop period, the frequency width of the transmission is from the 20 th PRB to the 25 th PRB, and in the 2 nd hop sub-period of the second, third, and fourth hop periods, the frequency width of the transmission is from the 20 th PRB to the 25 th PRB. In this case, the eNB may determine, according to SRSs of different hopping periods and the same frequency width, channel estimates corresponding to different antennas transmitting the same frequency width. In yet another embodiment of the present invention,

the number of the hopping sub-periods contained in one hopping period is K;

and/or

When K is an odd numberThen, the n-th transmission from the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

it should be understood that the formula in the present invention can be generally represented by a set of mapping relationships or a table, for example, a mapping relationship can be a corresponding relationship, for example, in this embodiment, the nth transmission_SRSAt or before transmission of an SRS according to a correspondence n_SRSDetermines the antenna number a (n) of transmission_SRS) It should be understood that, in the present embodiment, the value of the number may be 0,1,2,3, and such a value is merely an example, a (n) is_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

Optionally, before the UE sends the SRS to the eNB, the method may further include determining a frequency hopping period and/or a frequency hopping sub-period, where the method may be that the eNB issues a message to indicate the frequency hopping period/frequency hopping sub-period, and of course, the frequency hopping period and/or frequency hopping sub-period may be preset in the UE or the eNB.

According to the embodiment shown in fig. 7, in the process of sending the SRS to the base station by the UE, since the frequency ranges occupied by the SRS sent in each frequency hopping sub-period are different, the coverage of the SRS can be quickly covered in the frequency hopping process, and the channel characteristics can be obtained at the early stage of the frequency hopping process, thereby improving the system efficiency.

Fig. 9 is a structural diagram of an apparatus according to an embodiment of the present invention, and relates to a UE for transmitting a sounding reference signal SRS:

a determining unit 901 configured to determine a coverage area for transmitting an SRS;

a transmitting unit 902, configured to transmit, to a base station eNB, one SRS using one of four antennas in one hopping sub-period;

According to the embodiment shown in fig. 9, in the process of sending the SRS to the base station by the sending unit 902, since the frequency ranges occupied by the SRS sent in each frequency hopping sub-period are different, the situation that the coverage of the SRS is quickly covered in the frequency hopping process can be achieved, and the characteristics of the channel can be obtained in the early stage of the frequency hopping process, so that the system efficiency is improved.

Fig. 10 is a block diagram of an apparatus according to an embodiment of the present invention, and relates to a terminal apparatus UE for transmission of a sounding reference signal SRS:

a determining unit 1001 configured to determine a coverage area for transmitting an SRS;

a transmitting unit 1002, configured to transmit, to a base station eNB, one SRS using one of four antennas in one hopping sub-period; one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.

It should be understood that, in the case where the transmitting unit 1002 is used to transmit the SRS, the SRS is transmitted by using one of the 4 antennas at a time, but due to the bandwidth limitation and the requirement for improving the efficiency, the determining unit 1001 generally needs to determine the coverage of one SRS in the full frequency band, that is, the range that the transmitting unit 1002 cannot exceed the SRS signal transmitted from the SRS to the eNB multiple times. This range may be an overall range. For example, the range may be determined according to the value of the uplink bandwidth, may select a part of the uplink bandwidth or the whole uplink bandwidth, or may be determined according to a specific service requirement. From a time perspective, this determination may be static, semi-static, or dynamic scheduling control, or determined by the determination unit 1001 itself of the UE, or determined by the eNB scheduling the UE. The specific frequency hopping mode may be determined by the base station and then sent to a receiving unit 1003 of the UE, or obtained through negotiation between the base station and the UE.

Transmitting section 1002 may perform frequency hopping (hopping) during the process of transmitting the SRS signal, that is, perform switching of the frequency band position where the SRS is located in two adjacent time intervals within a certain coverage. This conversion rule may be done according to a particular manner. For example, the rule may be a hop period, in which n hop sub-periods are included. Optionally, n is an integer greater than or equal to 2. The transmitting unit 1002 transmits the SRS to the base station using one antenna of 4 antennas in each hop sub-period. At the end of the n hopping sub-periods, the SRS signal transmitted by the transmitting unit 1002 covers the entire coverage area. In an embodiment, the value of n may be associated with the number of nodes in a frequency hopping process, where a node may refer to a frequency band bandwidth, i.e., a frequency band position, of an SRS transmitted by a UE at a time, and the number of nodes may refer to a width of a node included in one coverage area in a frequency hopping process. For example, in table 6, when it is determined that the coverage is 6PRB-40PRB, if the value of n is 9, the number of nodes may be 9, and the frequency band covered by the SRS transmitted by any one antenna in at least one time slot is different:

TABLE 6

In Table I, 6-10 represents the 6 th PRB through the 10 th PRB. In the relationship between the number of nodes and the coverage shown in table 6, when 9 frequency hopping sub-periods end, the UE covers 1 node per sub-period, and the coverage of the entire coverage is completed. It should be understood that the order of the particular overlay nodes may not be done according to the order of 1-9. In one embodiment, this process may be to subdivide the 9 nodes into m groups, with adjacent hopping sub-periods, using nodes in different groups. In a specific implementation, the number of nodes or the number of nodes may not be determined according to the number.

In another embodiment, the coverage of the SRS transmitted by any one of the antennas is different in at least one time period, for example, the kth antenna, in which several SRS signals are transmitted to the eNB, and the frequency ranges covered by the several SRS signals are different, further explaining, for example, the SRS is transmitted in the s-th and t-th hopping sub-periods, and when the SRS transmitted in the s-th hopping sub-period covers the 10 th PRB-14 th PRB, the 10 th PRB-14 th PRB cannot be repeatedly covered in the t-th hopping sub-period. Where k may refer to a particular one of the antennas. It will be appreciated that there may be certain frequency band locations where coverage overlaps, in which case the number of hop sub-periods contained in a hop period may be greater than the number of nodes.

The determining unit may determine a transmission scheme of the antenna in addition to the frequency hopping scheme. In order to improve efficiency to the maximum extent, the frequency band covered by the SRS transmitted by any antenna may be different in four consecutive hopping periods. This frequency hopping process may begin at the beginning of the system Sounding (Sounding) process, i.e., at the beginning of the line. In such a case, the four antennas may each be enabled to traverse the entire coverage area directly during the first four consecutive hop periods.

In one embodiment, the sending unit may further satisfy: in one frequency hopping period, the number of times that any one antenna transmits the SRS is less than or equal to, which means rounding-down, and means rounding-up. In this case, the transmitting unit may transmit the SRS on as many antennas as possible in the first several hopping periods, so that the eNB may quickly obtain SRS conditions of different antennas.

In another embodiment, the sending unit sends the same frequency width in the ith hop sub-period of each hop period in the four consecutive hop periods, where i is any positive integer. For example, in the 2 nd hop sub-period of the first hop period, the frequency width of the transmission is from the 6 th PRB to the 40 th PRB, and in the 2 nd hop sub-period of the second, third, and fourth hop periods, the frequency width of the transmission is from the 6 th PRB to the 40 th PRB. In this case, the eNB may determine, according to SRSs of different hopping periods and the same frequency width, channel estimates corresponding to different antennas transmitting the same frequency width. The frequency width herein may refer to the number of PRBs, for example, 11-14 PRBs cover 4 PRBs, and the frequency width is 4 PRBs.

when K is an even number, the transmitting unit transmits the nth number to the base station eNB_SRSAntenna where individual SRS is locatedNumber a (n) of_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the transmitting unit transmits the nth signal to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod4；

In yet another embodiment of the present invention,

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

it should be understood that the formula in the present invention can be generally represented by a set of mapping relationships or a table, for example, a mapping relationship can be a corresponding relationship, for example, in this embodiment, the nth transmission_SRSAt or before transmission of an SRS according to a correspondence n_SRSDetermines the antenna number a (n) of transmission_SRS) It should be understood that, in the present embodiment, the value of the number may be 0,1,2,3, and such a value is only one example, a (n) is_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

Optionally, before the sending unit sends the SRS to the base station, the method may further include determining a frequency hopping period and/or a frequency hopping sub-period, where the method may be that the eNB issues a message to indicate the frequency hopping period/frequency hopping sub-period, and of course, the frequency hopping period and/or frequency hopping sub-period may be preset in a storage unit of the UE.

It should be understood that, in order for the eNB to acquire the channel conditions of all 4 antennas in the coverage area, it is preferable that the SRS transmitted by any one antenna of the transmitting unit covers the coverage area of the SRS in the four consecutive hopping periods. For example, in the receiving method described in the above embodiment, any pth antenna transmits an SRS in 4 periods to cover the coverage area.

According to the embodiment shown in fig. 2, in the process of sending the SRS to the base station, since the frequency ranges occupied by the SRS sent in each frequency hopping sub-period are different, the situation that the coverage of the SRS is quickly covered in the frequency hopping process can be achieved, the channel characteristics can be obtained at the early stage of the frequency hopping process, and the system efficiency is improved.

Fig. 11 is a block diagram of an apparatus according to an embodiment of the present invention, which relates to a terminal apparatus UE for sounding reference signals SRS:

a determining unit 1101 configured to determine a hopping sub-period;

a transmitting unit 1102, configured to transmit, to a base station eNB, an SRS using 2 antennas of the 4 antennas in at least one of the hopping sub-periods.

In the case where the transmitting unit transmits the SRS, a hopping sub-period, which is a time taken for the transmitting unit to transmit the SRS once, may be determined. The determining process may receive a base station indication signaling before initializing or performing subsequent steps, where the indication signaling includes the frequency hopping sub-period, or may be a parameter of a storage unit of a preset value in the UE.

In the process of sending the SRS by the sending unit, the efficiency of a Sounding (Sounding) process, that is, the efficiency of sending the SRS, can be improved by using two antennas. However, it is necessary to determine the selection of the antenna according to actual conditions so as not to repeat transmission to affect efficiency. In one embodiment, the transmitting unit transmits SRS to the eNB using 2 antennas of the 4 antennas in at least one hopping sub-period; and the transmitting unit transmits the SRS to the eNB using the other 2 antennas of the 4 antennas in at least another hopping sub-period.

In another embodiment, in the kth hop sub-period, the transmitting unit transmits the SRS to the eNB using 2 antennas of the 4 antennas; and in the (k + 1) th frequency hopping sub-period and/or in the (k-1) th frequency hopping sub-period, the other 2 antennas in the 4 antennas transmit SRS to the eNB. It should be understood that, in the process of the transmitting unit transmitting the SRS to the eNB using 2 antennas, the selection of antennas may be performed in an alternating manner, for example, in a first hopping sub-period, the transmitting unit uses the 1 st group of antennas, and in a second hopping sub-period, the transmitting unit uses the 2 nd group of antennas. Thus, the influence of the reuse of one antenna on the transmission efficiency can be avoided.

In another embodiment, the determining unit determines the number K of times that the SRS signal is transmitted in the one hopping period; when K is an even number, the transmitting unit transmits the nth number to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

a(n_SRS)＝n_SRS mod2；

It should be understood that the formula in the present invention can be generally represented by a set of mapping relationships or a table, for example, a mapping relationship can be a corresponding relationship, for example, in this embodiment, the nth transmission_SRSAt or before transmission of an SRS according to a correspondence n_SRSDetermines the antenna number a (n) of transmission_SRS) It should be understood that in this embodiment, the number may take on the values 0,1, and as suchThe value of (a) is just an example, and the present invention claims that a (n) is caused by the deformation of the formula_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

In one embodiment, the determining unit determines that the antenna corresponding to the first element a and the antenna corresponding to the third element C are the first antenna combination; the sending unit uses an antenna corresponding to a second element B and an antenna corresponding to a fourth element D as the second antenna combination; the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.

In an embodiment, when the precoding matrix selectable by the determining unit includes a precoding matrix with a non-zero element of 2, for example, because the difference of channel characteristics is considered:

TABLE 7

In table 7, the precoding matrix of the first behavior indicates that the precoding matrix of the second behavior corresponds to the element in the codebook, and the grouping manner of the antennas, such as the precoding matrix corresponding to the structure of indexes 16 to 19, can be determined according to the codebook form of the precoding matrix, and the values of the first element and the third element are non-zero; the second and fourth element values are non-zero, as are the precoding matrices corresponding to the structure of indices 20-23. If the first element and the third element correspond to an antenna 0 and an antenna 2, and the second element and the fourth element correspond to an antenna 1 and an antenna 3; then, after the transmitting unit transmits the SRS to the eNB, the eNB may obtain channel estimates of corresponding groups of antennas, so as to further improve system efficiency.

In an embodiment, when the precoding matrix set includes two or more precoding matrices, the determining unit determines that an antenna corresponding to a first element and an antenna corresponding to a third element in a precoding matrix are 2 of the 4 antennas; the determining unit determines that the antenna corresponding to the second element and the antenna corresponding to the fourth element in the precoding matrix are the other 2 of the 4 antennas.

Or, the precoding matrix with the number of the non-zero elements being 2 is a matrix with a structure of or; the determining unit may determine the 2 antennas according to the precoding matrix whose number of the non-zero elements is 2, and may further include: when the precoding matrix structure is yes, determining the antennas corresponding to the A1 and the A2 as two antennas in the 4 antennas; or when the precoding matrix structure is yes, determining that the antennas corresponding to the B1 and the B2 are two antennas in the 4 antennas.

According to the embodiment of the present invention, the determining unit determines a hopping sub-period, and transmits the SRS to the base station eNB using 2 antennas of the 4 antennas in at least one of the hopping sub-periods. In a specific sending process, grouping can be performed according to the antennas, and proper antennas are used for grouping in different frequency hopping sub-periods, so that the SRS sending process can be completed quickly, and the system efficiency is improved.

Fig. 12 is a diagram showing a configuration of an apparatus according to an embodiment of the present invention, and relates to a base station eNB apparatus:

a determining unit 1201, configured to determine a coverage area of the received SRS;

a receiving unit 1202, configured to receive, in one hop sub-period, one SRS that is transmitted by the user equipment UE using one antenna of four antennas;

wherein, one hopping period includes at least two hopping sub-periods, and in at least one time period, the frequency bands covered by the SRS transmitted by any antenna received by the receiving unit are different, and the time period is four consecutive hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.

According to the embodiment shown in fig. 12, in the process of receiving the SRS sent by the UE, since the frequency ranges occupied by the SRS sent in each frequency hopping sub-period are different, the situation that the coverage of the SRS is quickly covered in the frequency hopping process can be achieved, and the channel characteristics can be obtained at the early stage of the frequency hopping process, so that the system efficiency is improved.

Fig. 13 is a diagram showing a configuration of an apparatus according to an embodiment of the present invention, and relates to a base station eNB apparatus:

a determining unit 1301, configured to determine a coverage of receiving an SRS;

a receiving unit 1302, configured to receive, in a frequency hopping sub-period, one SRS that is transmitted by the user equipment UE using one of the four antennas; the method comprises the steps that one frequency hopping period comprises at least two frequency hopping sub-periods, in at least one time period, the frequency bands covered by the received SRS sent by any one antenna are different, and the time period is four continuous frequency hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.

It should be understood that, in the case where the receiving unit receives the SRS transmitted by the UE, the SRS is transmitted by using one of the 4 antennas at a time, but due to the bandwidth limitation and the requirement for improving the efficiency, the determining unit generally needs to determine the coverage of one SRS in the full frequency band, so that the UE transmits the SRS to a range which cannot be exceeded by the SRS signal of the receiving unit multiple times. This range may be an overall range. For example, the range may be determined according to the value of the uplink bandwidth, may select a part of the uplink bandwidth or the whole uplink bandwidth, or may be determined according to a specific service requirement. From the time point, this determination manner may be statically, semi-statically or dynamically determined, or may be determined by the eNB scheduling the UE through a signaling unit 1303. The specific frequency hopping mode may be determined by the determining unit and then sent to the UE, or obtained through negotiation between the determining unit and/or the sending unit and the UE.

In the process of receiving the SRS signal, the receiving unit may receive the SRS signal from the UE in a frequency hopping (hopping) manner, that is, in a certain coverage range, the receiving unit switches the frequency band position of the SRS at two adjacent time intervals. This conversion rule can be implemented in a particular manner.

Due to the sounding transmission, the determining unit needs to determine the frequency at which the SRS transmitted by the UE is received. The present invention is not particularly limited to this determination method, and the sending unit may directly know the SRS signal from the received SRS signal, or may notify the UE through negotiation or predetermined, and after the sending unit notifies the UE through a single signaling, the receiving unit receives the SRS signal sent by the UE in a predetermined frequency hopping sub-period and according to a predetermined frequency range. And in each frequency hopping sub-period, the receiving unit receives the SRS transmitted by the UE to the receiving unit by using one antenna of the 4 antennas. For example, the rule may be a hop period, in which n hop sub-periods are included. Optionally, n is an integer greater than or equal to 2. At the end of the n hopping sub-periods, the receiving unit receives the SRS signal covering the entire coverage area. In an embodiment, the value of n may be associated with the number of nodes in a frequency hopping process, where a node may refer to a frequency band bandwidth, i.e., a frequency band position, where the receiving unit receives an SRS transmitted by a UE at one time, and the number of nodes may refer to a width of a node included in one coverage area in a frequency hopping process at one time. For example, in table 8, when it is determined that the coverage is 6PRB-40PRB, if the value of n is 9, the number of nodes may be 9, and the frequency band covered by the SRS transmitted by any one antenna in at least one time slot is different:

TABLE 8

In the relationship between the number of nodes and the coverage shown in table 8, when 9 hopping sub-periods end, the receiving unit receives the SRS transmitted by the UE, and the coverage of the entire coverage can be completed in such a manner that 1 node is covered per sub-period. It should be understood that the order of the particular overlay nodes may not be done according to the order of 1-9. In one embodiment, this process may be to subdivide the 9 nodes into m groups, with adjacent hopping sub-periods, using nodes in different groups. In a specific implementation, the number of nodes or the number of nodes may not be determined according to the number.

In another embodiment, the receiving unit receives SRSs transmitted by any one antenna in different frequency bands in at least one time period, for example, the kth antenna, and in this time period, several SRSs are received, and the frequency bands covered by these SRS signals are different. To explain further, for example, when the SRS is received in the s-th and t-th hopping sub-periods, the 10-th PRB-14PRB cannot be repeatedly covered in the t-th hopping sub-period when the 10-th PRB-14PRB is covered by the SRS received in the s-th hopping sub-period. Where k may refer to a particular one of the antennas. It will be appreciated that there may be certain frequency band locations where coverage overlaps, in which case the number of hop sub-periods contained in a hop period may be greater than the number of nodes.

The determining unit needs to determine the transmission mode of the UE antenna in addition to the frequency hopping mode. In order to improve efficiency to the maximum extent, the frequency band covered by the SRS transmitted by any one of the received antennas may be different in four consecutive hopping periods. This frequency hopping process may begin at the beginning of the system Sounding (Sounding) process, i.e., at the beginning of the line. In such a case, the four antennas may each be enabled to traverse the entire coverage area directly during the first four consecutive hop periods.

In an embodiment, the receiving unit may receive the SRS transmitted by the UE, and the following may be further satisfied: in one frequency hopping period, the number of times that any one antenna received by the receiving unit transmits the SRS is less than or equal to that, which means rounding-down, and means rounding-up. In this case, the receiving unit may receive the SRS on as many antennas as possible in the first several hopping periods, so that the receiving unit may quickly obtain the SRS conditions of different antennas.

In another embodiment, the receiving unit receives the same frequency width in the ith hop sub-period of each hop period among the four consecutive hop periods, where i is any positive integer. For example, in the 2 nd hop sub-period of the first hop period, the received frequency width is 20 th PRB to 25 th PRB, and in the 2 nd hop sub-period of the second, third, and fourth hop periods, the transmitted frequency width is 20 th PRB to 25 th PRB. In this case, the determining unit may determine, according to SRSs of the same frequency width in different hopping periods, channel estimates corresponding to different antennas transmitting the same frequency width.

when K is even number, the nth transmitted by the UE to the receiving unit_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd number, the nth transmitted by the UE to the receiving unit_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod4；

In yet another embodiment of the present invention,

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

a(n_SRS)＝n_SRS mod4；

Or;

the number of the hopping sub-periods contained in one hopping period is K;

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSOf the antenna in which the SRS is locatedNumber a (n)_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRS mod4；

or;

the number of the hopping sub-periods contained in one hopping period is K;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

a(n_SRS)＝n_SRS mod4；

it should be understood that the formula in the present invention can be generally represented by a set of mapping relationships or a table, for example, a mapping relationship, for example, in this embodiment, the nth relationship is received_SRSWhen the SRS is received, the nth_SRSAfter or before reception of an SRS, according to a correspondence n_SRSDetermines the received antenna number a (n)_SRS) It should be understood that, in the present embodiment, the value of the number may be 0,1,2,3, and such a value is merely an example, a (n) is_SRS) The value of (a) may not be the value in this embodiment or is not limited to determining the antenna number as a symbol or identifier, and may be according to the n_SRSA symbol or identification is directly determined for indicating the corresponding antenna in this embodiment. The present invention claims a mapping relationship and a corresponding set or table corresponding to the antenna id, similar to the embodiment.

Optionally, before the receiving unit receives the SRS from the UE, the determining unit may further determine a hopping period and/or a hopping sub-period, where this manner may be that the sending unit issues a message to indicate the hopping period/hopping sub-period, and this hopping period and/or hopping sub-period may be preset in a storage unit of the eNB or the UE.

It should be understood that, in order for the determining unit to acquire the channel conditions of all 4 antennas in the coverage area, it is preferable that the SRS transmitted by any one antenna received by the receiving unit covers the coverage area of the SRS in the four consecutive hopping periods. For example, in the receiving method described in the above embodiment, any pth antenna transmits an SRS in 4 periods to cover the coverage area.

According to the embodiment shown in fig. 3, in the process of receiving the SRS, since the SRS received in each frequency hopping sub-period occupies different frequency ranges, the situation that the coverage of the SRS is quickly covered in the frequency hopping process can be achieved, and the characteristics of the channel can be obtained in the early stage of the frequency hopping process, so as to perform preliminary estimation on the channel matrix or the channel model, thereby improving the system efficiency.

Fig. 14 is a schematic flow chart of a communication method according to an embodiment of the present invention, relating to a method for transmitting sounding reference signals, SRSs:

a determining unit 1401 for determining a hopping sub-period;

A receiving unit 1402, configured to receive, by the eNB, the SRS transmitted by the UE using 2 antennas of the 4 antennas in at least one of the frequency hopping sub-periods.

In the process of receiving the SRS by the receiving unit, the UE can be notified to use two antennas to transmit SRS signals to complete a Sounding (Sounding) process, so as to improve the efficiency of receiving the SRS and estimating channel characteristics. However, it is necessary to determine the selection of the antenna according to actual conditions so as not to repeat transmission to affect efficiency. In one embodiment, the receiving unit receives SRSs transmitted by 2 antennas of the 4 antennas to the eNB in at least one hopping sub-period; and in at least another frequency hopping sub-period, the unit receives the SRS transmitted by the other 2 antennas of the 4 antennas to the eNB.

In another embodiment, in the kth frequency hopping sub-period, the receiving unit receives 2 antennas of 4 antennas to transmit SRS to the eNB; and in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period, the receiving unit receives the other 2 antennas in the 4 antennas and transmits SRS to the eNB. It should be understood that, in the process of transmitting the SRS to the receiving unit by the receiving 2 antennas, the eNB may complete the receiving process in an alternating manner, for example, in the first hopping sub-period, the eNB receives the SRS transmitted by the UE using the 1 st group of antennas, and in the second hopping sub-period, the eNB receives the SRS transmitted by the UE using the 2 nd group of antennas. It should be understood that this rule may enable the eNB to determine itself and inform the UE to transmit according to the determined manner, so that it may be avoided that the UE reuses a certain antenna and thus affects the transmission efficiency.

In another embodiment, the determining unit determines the number K of times that the SRS signal is received in the one hopping period;

and/or

a(n_SRS)＝n_SRS mod2；

wherein the β is constant, and when the value of K is an integer multiple of 4When said β has a value of 1, when said K has a value other than an integer multiple of 4, said β has a value of 0, said mod is a modulo sign, and each of said a (n) s_SRS) One value of (a) corresponds to one antenna combination for indicating in the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period.

According to the embodiment of the present invention, the determining unit determines a hopping sub-period, and the receiving unit receives, in at least one of the hopping sub-periods, the SRS transmitted by the UE to the base station eNB using 2 of the 4 antennas. In a specific sending process, grouping can be performed according to the antennas, and proper antennas are used for grouping in different frequency hopping sub-periods, so that the SRS sending process can be completed quickly, and the system efficiency is improved.

It should be understood that in various embodiments of the present invention, the transmitting unit may be a transmitter, or an antenna system that may drive an antenna or radio; for the embodiment of the present invention, the UE drives 4 antennas, where the 4 antennas may be included in the transmitter, or may be driven by a driving circuit or a transmitter to transmit the SRS; the receiving unit may be a receiver, or an antenna system, which may receive signals; or the same antenna system as the transmitting unit. The determining unit may be one or more processors, and the Processor may be a general-purpose Processor, such as a general-purpose Central Processing Unit (CPU), a Network Processor (NP), a microprocessor, or the like, or an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the program according to the embodiment of the present invention. But may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. Or multiple processors may perform different functions. The storage unit may be a memory, and data information to be stored, such as configuration information, the determined coverage range, or a corresponding relationship table, may also be stored in the storage unit or the memory so as to be called.

For executing the embodiments of the present invention, the memory may further store a program for executing the technical solution of the embodiments of the present invention, and may further store an operating system and other application programs. In particular, the program may include program code including computer operating instructions. More specifically, the memory may be a read-only memory (ROM), other types of static storage devices that may store static information and instructions, a Random Access Memory (RAM), other types of dynamic storage devices that may store information and instructions, a disk storage device, and so forth. Or may be a different memory storage.

Through the above description of the embodiments, those skilled in the art will clearly understand that the embodiments of the present invention may be implemented by hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, the method is simple. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or a wireless technology such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technology such as infrared, radio, and microwave are included in the fixation of the medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy Disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

In short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A method for sending Sounding Reference Signals (SRS), characterized by:

the method comprises the steps that User Equipment (UE) determines the coverage range of sending SRS;

the UE transmits an SRS to a base station eNB by using one antenna in four antennas in a frequency hopping sub-period; one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.
The transmission method according to claim 1, characterized in that:

and in the four continuous frequency hopping periods, the SRS sent by any one antenna of the UE covers the coverage range of the SRS.
The transmission method according to claim 1, characterized in that:

and in the four continuous frequency hopping periods, the frequency width sent by the ith frequency hopping sub-period of each frequency hopping period is the same, wherein i is any positive integer.
The transmission method of claim 1,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

wherein β is a constant, β is 1 when K is an integer multiple of 8,6,10,18, β is 0 when K is not an integer multiple of 8,6,10,18, mod is a modulo sign, γ is a constant, γ is 0 when K is an integer multiple of 6,10,18, and γ is 1 when K is not an integer multiple of 6,10, 18.
The transmission method of claim 1,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

the β is 1 when the K is an integer multiple of 8 or 6,10 or 18, the β is 0 when the K is not an integer multiple of 8 and is not 6,10 or 18, wherein gamma is a constant, 0 when the K is 6,10 or 18, and 1 when the K is not 6,10 or 18.
The transmission method of claim 1,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSA relationship satisfying, when the value of K is an integer multiple of 4:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integral multiple of 4, the following conditions are satisfied:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSCoding of antenna where individual SRS is locatedNumber a (n)_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；
the transmission method of claim 1,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSWhen the value of K is an integer multiple of 4, or K is 2, the following relationship is satisfied:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；
a method for sending Sounding Reference Signals (SRS), characterized by:

the method comprises the steps that User Equipment (UE) determines a frequency hopping sub-period;

and the UE transmits SRS to a base station eNB by using 2 antennas in the 4 antennas in at least one frequency hopping sub-period.
The method of claim 8, wherein 2 of the 4 antennas transmit SRS to the eNB, and specifically comprises:

transmitting, by 2 antennas of the 4 antennas, an SRS to the eNB in at least one hopping sub-period;

and is

Transmitting, by the other 2 of the 4 antennas, an SRS to the eNB in at least another hop sub-period.
The method according to claim 8 or 9, wherein 2 of the 4 antennas transmit SRS to a base station eNB, specifically comprising:

transmitting, by 2 antennas of the 4 antennas, an SRS to the eNB within a kth frequency hopping sub-period;

and in the (k + 1) th frequency hopping sub-period and/or in the (k-1) th frequency hopping sub-period, the other 2 antennas in the 4 antennas transmit SRS to the eNB.
The method of claim 8 or 9, wherein 2 of the 4 antennas transmit SRS to the eNB, specifically comprising:

the UE determines the number K of times of sending SRS signals in the frequency hopping period;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the nth transmitted by the UE to the eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod2；

wherein the β is a constant and the value of β is 1 when the value of K is an integer multiple of 4, the value of β is 0 when the value of K is not an integer multiple of 4, the mod is a modulo sign, and each of the a (n) s_SRS) One value of (a) corresponds to one antenna group, said (n)_SRS) For indication at the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period.
The method of claim 11, wherein a (n) is_SRS) Respectively correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of 2 out of 4 antennasThe lines are combined into another 2 of 4 antennas.
The method of claim 12, further comprising;

the UE determines that an antenna corresponding to a first element A and an antenna corresponding to a third element C are the first antenna combination;

the UE uses an antenna corresponding to a second element B and an antenna corresponding to a fourth element D as the second antenna combination;

the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.
A method for receiving Sounding Reference Signals (SRS), characterized by:

the base station eNB determines the coverage range of the received SRS;

the eNB receives an SRS sent by user equipment UE by using one antenna in four antennas in a frequency hopping sub-period; the method comprises the steps that one frequency hopping period comprises at least two frequency hopping sub-periods, in at least one time period, the frequency bands covered by the received SRS sent by any one antenna are different, and the time period is four continuous frequency hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.
The receiving method according to claim 14, wherein the SRS transmitted by any one antenna received by the eNB covers the coverage of the SRS in the four consecutive hopping periods.
The transmission method of claim 14, wherein:

and the eNB receives the ith frequency hopping sub-period in each frequency hopping period in the four continuous frequency hopping periods, wherein the frequency width of the ith frequency hopping sub-period is the same, and i is any positive integer.
The transmission method of claim 14,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

wherein β is a constant, β is 1 when K is an integer multiple of 8,6,10,18, β is 0 when K is not an integer multiple of 8,6,10,18, mod is a modulo sign, γ is a constant, γ is 0 when K is an integer multiple of 6,10,18, and γ is 1 when K is not an integer multiple of 6,10, 18.
The transmission method of claim 14,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

the β is 1 when the K is an integer multiple of 8 or 6,10 or 18, the β is 0 when the K is not an integer multiple of 8 and is not 6,10 or 18, wherein gamma is a constant, 0 when the K is 6,10 or 18, and 1 when the K is not 6,10 or 18.
The transmission method of claim 14,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSA relationship satisfying, when the value of K is an integer multiple of 4:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integral multiple of 4, the following conditions are satisfied:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；
the transmission method of claim 14,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSWhen the value of K is an integer multiple of 4, or K is 2, the following relationship is satisfied:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；
a method for receiving Sounding Reference Signals (SRS), characterized by:

the base station eNB determines a frequency hopping sub-period;

and the eNB receives the SRS sent by the UE by using 2 antennas in 4 antennas in at least one frequency hopping sub-period.
The method of claim 21, wherein the receiving the SRS transmitted by the UE using 2 of 4 antennas comprises:

receiving 2 antennas of the 4 antennas to transmit SRS to the eNB in at least one frequency hopping sub-period; and is

Receiving another 2 antennas of the 4 antennas to transmit an SRS to the eNB in at least another hop sub-period.
The method of claim 21 or 22, wherein the eNB receives the SRS transmitted by the UE using 2 of 4 antennas, and specifically comprises:

in a kth frequency hopping sub-period, the eNB receives the SRS sent by 2 antennas of the 4 antennas to the eNB;

and in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period, the eNB receives the other 2 antennas of the 4 antennas and transmits SRS to the eNB.
The method of claim 22 or 23, wherein the eNB receives the SRS transmitted by the UE using 2 of 4 antennas, and specifically comprises:

the eNB determines the number K of times of receiving SRS signals in the frequency hopping period;

when K is an even number, the eNB receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is an odd number, the eNB receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod2；

wherein the β is a constant and the value of β is 1 when the value of K is an integer multiple of 4, the value of β is 0 when the value of K is not an integer multiple of 4, the mod is a modulo sign, and each of the a (n) s_SRS) One value of (a) corresponds to one antenna combination for indicating in the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period.
The method of claim 23, wherein a (n) is greater than or equal to_SRS) The two values of (a) correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of the other 2 out of 4 antennas, respectively.
The method of claims 22 to 25, further comprising;

the eNB determines that an antenna corresponding to a first element A and an antenna corresponding to a third element C are the first antenna combination;

the eNB determines that an antenna corresponding to a second element B and an antenna corresponding to a fourth element D are the second antenna combination;

the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.
A user equipment, UE, characterized by:

a determining unit, configured to determine a coverage area for transmitting the SRS;

a transmitting unit, configured to transmit, to a base station eNB, one SRS using one of four antennas in one hopping sub-period; one hopping period comprises at least two hopping sub-periods, the frequency bands covered by the SRS sent by any one antenna in at least one time period are different, and the time period is four continuous hopping periods; in each frequency hopping period, the frequency range occupied by the SRS transmitted in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS transmitted in all the frequency hopping sub-periods is the coverage range.
The UE according to claim 27, wherein the SRS transmitted by the transmitting unit using any one antenna covers a coverage of the SRS during the four consecutive hopping periods.
The UE of claim 27, wherein:

and the sending unit sends the same frequency width in the ith frequency hopping sub-period of each frequency hopping period in the four continuous frequency hopping periods, wherein i is any positive integer.
The UE of claim 27,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

wherein β is a constant, β is 1 when K is an integer multiple of 8,6,10,18, β is 0 when K is not an integer multiple of 8,6,10,18, mod is a modulo sign, γ is a constant, γ is 0 when K is an integer multiple of 6,10,18, and γ is 1 when K is not an integer multiple of 6,10, 18.
The UE of claim 27, wherein,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

the β is 1 when the K is an integer multiple of 8 or 6,10 or 18, the β is 0 when the K is not an integer multiple of 8 and is not 6,10 or 18, wherein gamma is a constant, 0 when the K is 6,10 or 18, and 1 when the K is not 6,10 or 18.
The UE of claim 27, wherein,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSA relationship satisfying, when the value of K is an integer multiple of 4:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integral multiple of 4, the following conditions are satisfied:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；
the UE of claim 27,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSWhen the value of K is an integer multiple of 4, or K is 2, the following relationship is satisfied:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod 4；
a user equipment, UE, characterized by:

a determining unit, configured to determine a hopping sub-period;

and a transmitting unit, configured to transmit, to the base station eNB, an SRS using 2 antennas of the 4 antennas in at least one of the hopping sub-periods.
The UE of claim 34, wherein the transmitting unit transmits the SRS to the base station eNB using 2 of the 4 antennas, and specifically comprises:

the transmitting unit transmits the data to the base station using 2 of the 4 antennas during at least one hop sub-period

The eNB transmits an SRS; and is

The transmitting unit transmits the SRS to the eNB using the other 2 antennas of the 4 antennas for at least another hopping sub-period.
The method of claim 34 or 35, wherein the transmitting unit transmits the SRS to the eNB using 2 of the 4 antennas, specifically comprising:

in a kth frequency hopping sub-period, the transmitting unit transmits an SRS to the eNB using 2 antennas of the 4 antennas;

and in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period, the transmitting unit transmits the SRS to the eNB by using the other 2 antennas in the 4 antennas.
The method of claim 34 or 35, wherein the transmitting unit transmits the SRS to the eNB using 2 of the 4 antennas, specifically comprising:

the determining unit is further configured to determine a number K of times that the SRS signal is transmitted in the one hopping period;

when K is an even number, the transmitting unit transmits the nth number to the base station eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the transmitting unit transmits the nth signal to the eNB_SRSNumber a (n) of antenna group where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod2；

wherein the β is constant, the value of β is 1 when the value of K is an integer multiple of 4, and the value of K is not an integer multiple of 4The value of β is 0, mod is a modulo symbol, and each of a (n) is a_SRS) One value of (a) corresponds to one antenna group, said (n)_SRS) For indication at the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period.
The method of claim 37, wherein a (n) is greater than n_SRS) The two values of (a) correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of the other 2 out of 4 antennas, respectively.
The method of any one of claims 35 to 38, further comprising;

the determining unit is further configured to determine that an antenna corresponding to a first element a and an antenna corresponding to the third element C are the first antenna combination;

the determining unit is further configured to determine that an antenna corresponding to a second element B and an antenna corresponding to the fourth element D are the second antenna combination;

the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.
A base station apparatus, characterized in that:

a determining unit, configured to determine a coverage area of the received SRS;

a receiving unit, configured to receive, in a frequency hopping sub-period, an SRS that is transmitted by a user equipment UE using one of four antennas; the method comprises the steps that one frequency hopping period comprises at least two frequency hopping sub-periods, in at least one time period, the frequency bands covered by the received SRS sent by any one antenna are different, and the time period is four continuous frequency hopping periods; in each frequency hopping period, the frequency range occupied by the SRS received in each frequency hopping sub-period is different, and in each frequency hopping period, the frequency range occupied by the SRS received in all the frequency hopping sub-periods is the coverage range.
The base station according to claim 40, wherein said receiving unit receives a coverage of said SRS by said SRS transmitted by any one antenna.
The base station of claim 40, wherein:

and the receiving unit receives the ith frequency hopping sub-period in each frequency hopping period in the four continuous frequency hopping periods, wherein the frequency width of the ith frequency hopping sub-period is the same, and i is any positive integer.
The base station of claim 40,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

wherein β is a constant, β is 1 when K is an integer multiple of 8,6,10,18, β is 0 when K is not an integer multiple of 8,6,10,18, mod is a modulo sign, γ is a constant, γ is 0 when K is an integer multiple of 6,10,18, and γ is 1 when K is not an integer multiple of 6,10, 18.
The base station of claim 40,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the UE transmits to the base station eNBn_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；

the β is 1 when the K is an integer multiple of 8 or 6,10 or 18, the β is 0 when the K is not an integer multiple of 8 and is not 6,10 or 18, wherein gamma is a constant, 0 when the K is 6,10 or 18, and 1 when the K is not 6,10 or 18.
The base station of claim 40,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSA relationship satisfying, when the value of K is an integer multiple of 4:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integral multiple of 4, the following conditions are satisfied:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；
the base station of claim 40, wherein,

the number of the hopping sub-periods contained in one hopping period is K;

when K is an even number, the nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSWhen the value of K is an integer multiple of 4, or K is 2, the following relationship is satisfied:

wherein β is a constant, and when the value of K is an integer multiple of 8, the value of β is 1, when the value of K is not an integer multiple of 8, the value of β is 0, mod is a modulo sign;

when the value of K is not an integer multiple of 4, and K is 2, satisfying:

and/or

When K is odd, the Nth transmitted by the UE to the base station eNB_SRSNumber a (n) of antenna where SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod4；
a base station apparatus, characterized in that:

a determining unit, configured to determine a hopping sub-period;

a receiving unit, configured to receive, in at least one of the frequency hopping sub-periods, an SRS that is transmitted by the UE using 2 of the 4 antennas.
The method of claim 47, wherein the receiving the SRS transmitted by the UE using 2 of the 4 antennas comprises:

receiving 2 antennas of the 4 antennas to transmit SRS to the eNB in at least one frequency hopping sub-period; and is

Receiving another 2 antennas of the 4 antennas to transmit an SRS to the eNB in at least another hop sub-period.
The base station of claim 47 or 48, wherein the receiving unit receives the SRS transmitted by the UE using 2 of the 4 antennas, specifically comprising:

in a kth frequency hopping sub-period, the receiving unit receives the SRS transmitted by 2 of the 4 antennas to the eNB;

and the receiving unit receives the other 2 antennas of the 4 antennas to transmit the SRS to the eNB in the (k + 1) th frequency hopping sub-period and/or the (k-1) th frequency hopping sub-period.
The base station of claim 47 or 48, wherein the receiving unit receives the SRS transmitted by the UE using 2 of the 4 antennas, specifically comprising:

the determining unit is further configured to determine a number K of times that the SRS signal is received in the one frequency hopping period;

when K is even number, the receiving unit receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

and/or

When K is odd number, the receiving unit receives the nth transmitted by the UE_SRSThe number a (n) of the sub-band where the SRS is located_SRS) And said n_SRSThe relation satisfies:

a(n_SRS)＝n_SRSmod2；

wherein the β is a constant and the value of β is 1 when the value of K is an integer multiple of 4, the value of β is 0 when the value of K is not an integer multiple of 4, the mod is a modulo sign, and each of the a (n) s_SRS) One value of (a) corresponds to one antenna combination for indicating in the n-th_SRSAnd transmitting the SRS antenna in each frequency hopping sub-period.
The base station as claimed in claim 50, wherein a (n) is the same as_SRS) The two values of (a) correspond to a first antenna combination of 2 out of 4 antennas and a second antenna combination of the other 2 out of 4 antennas, respectively.
The base station according to any of claims 48 to 51, further comprising;

the determining unit is further configured to determine that an antenna corresponding to a first element a and an antenna corresponding to the third element C are the first antenna combination;

the determining unit is further configured to determine that an antenna corresponding to a second element B and an antenna corresponding to the fourth element D are the second antenna combination;

the first element a, the second element B, the third element C, and the fourth element D are weights for the 4 antennas, respectively, and the first element a, the second element B, the third element C, and the fourth element D are elements of a precoding matrix vector with a rank of 1.