WO2013044674A1

WO2013044674A1 - Sequence hopping method and device for uplink demodulation reference signal

Info

Publication number: WO2013044674A1
Application number: PCT/CN2012/079089
Authority: WO
Inventors: 弓宇宏; 孙云锋; 郭森宝; 戴博; 梁春丽
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-09-30
Filing date: 2012-07-24
Publication date: 2013-04-04
Also published as: CN103036662B; CN103036662A

Abstract

Disclosed are a sequence hopping method and device for an uplink demodulation reference signal (DMRS). The method includes the following steps: receiving information about a physical uplink shared channel (PUSCH) DMRS sequence from the network side, wherein the information about the PUSCHDMRS sequence includes at least one of the following: cyclic shift (CS) hopping mode information, cell identifier offset information, and sequence index offset information; and determining a sequence hopping mode and/or sequence hopping pattern of the PUSCHDMRS according to the information about the PUSCHDMRS sequence and performing sequence hopping according to the determined sequence hopping mode and/or sequence hopping pattern of the PUSCHDMRS. The present invention improves the resource utilization rate of the system.

Description

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a sequence hopping method and apparatus for a Demodulation Reference Signal (DMRS). In the Long Term Evolution Advanced (LTE-A) system, in order to improve the transmission rate of the cell edge, 3GPP introduces Coordinated Multi-Point Transmission and Reception (CoMP) technology. It mainly improves the data transmission rate of edge users through inter-cell cooperation. CoMP technology improves the throughput of edge users but also increases the complexity of network systems. In LTE R10 (version 10), DMRS-based single-user MIMO (Single User-MIMO, abbreviated as SU-MIMO) and single-cell MIMO (Multi-User MIMO (MU-MIMO)) can be effectively supported. However, there is still room for further enhancement of inter-cell MU-MIMO. In an LTE-A system, especially in an uplink CoMP system, multiple cells need to be simultaneously served to a target user (User Equipment, UE for short). If the target user is an SU user, the target user can obtain performance gain through CoMP. On the other hand, it may cause a certain waste of resources or a decrease in the average throughput of the system. Therefore, in order to utilize system resources more effectively, the uplink CoMP system proposes higher inter-cell MU (Multiple User or Multi-User). The requirements include the ability to support more users at the same time and the orthogonality between these multiple users. For inter-cell MUs, if different cells are configured with different uplink DMRS sequence groups, they can only be orthogonal by Orthogonal Cover Code (OCC), and can only multiplex 2 users at the same time; For the same uplink DMRS sequence group, more users can be multiplexed by using Cyclic Shift (CS) and/or OCC. However, the current CS hopping mode of the DMRS sequence in the Physical Uplink Shared Channel (PUSCH) cannot guarantee the same CS hopping mode between MU users in the cell, resulting in CS conflicts between MU users. The problem or OCC cannot be decoded correctly, thus affecting the performance of inter-cell MU users. Currently, the method for determining the sequence group used by each cell in R10 is as follows:

M = (_ (" _s ) + /Jmod30, Among them, ("J represents a sequence group hopping pattern, which represents sequence index information. A total of 17 sequence group hopping patterns and 30 sequence index letters are specified in LTE.

Sequence group hopping function is off

+/ 2') mod30 sequence group hopping function is enabled

The opening or closing of the sequence group hopping function is controlled in R10 by cell-specific higher layer signaling Group-hopping-enabled. If the network side does not send Group-hopping-enabled signaling to the cell, for all users in the cell:

■ (" _s ) = o; If the network side has sent signaling to the cell, for all users in the cell:

■ (" _s ) = (∑:= ₀ c(8" _s +'.)-2') mod30. where " ₈ represents the slot index, c(8« _{s +} 0 represents the pseudo-random sequence, its initialization value For: cell

30 where N^ represents the cell identity. At the same time, user-specific (ue-specific) high-level signaling Disable-sequence-group-hopping is defined in R10 to enable those specific users who use OCC technology for DMRS on PUSCH to turn off their sequence group hopping function. For PUCCH: TM ^CCH = NS ¹¹ mod 30, for PUSCH, r ^SCH =fe ^UCCH +Ajmod30, A _ss Ε {0,1,..,29} _ο Δ ₈₈ is a cell-specific high-level parameter. In the case that the sequence group hopping function is disabled, the network side can use the coordinated configuration of the parameters to implement the same DMRS sequence group for the PUSCH of different cells. In the case that the sequence group hopping function is enabled, the PUSCH of any two or more different cells cannot use the same DMRS sequence group in the current standard. In this case, the multiplexing of the inter-cell users cannot be implemented by the CS. Currently, the method for determining the intra-group sequence used by each cell in R10 is as follows: c(n _s ) if the sequence hopping function in the group is on and the sequence group hopping function is off

0 Others, the pseudo-random sequence c{n _s ) represents the hopping pattern of the sequence, and its initial value satisfies:

30 group intra-sequence hopping function is enabled or disabled by cell-specific high-level signaling in R10

The above-mentioned user-specific (ue-specific) high-level signaling Disable-sequ ce-group-hopping defined in R10 can also be used to disable the intra-group sequence hopping function for a specific user. R10 specifies that the sequence group hopping function and sequence hopping function in the group cannot be used at the same time. When the intra-group sequence hopping function is enabled, the current standard cannot support the same DMRS sequence for any two or more different cells. In this case, the inter-cell user multiplexing cannot be implemented by the CS. Currently, the method for determining the CS for each user in R10 is as follows: = ("Sins + «D3⁄4RS,^ + «ΡΝ (" _s )) mod 12, where "SIRS is configured by the network side through high-level signaling, by the network Side through PDCCH configuration, "SIRS

_M (2)

And jointly determine the user's _CS jump initialization value.

Represents a CS hopping pattern whose initial pseudo-random sequence value is:

V cell

PUSCH

^C imt

30 When there is an inter-cell MU, the network side can ensure that the inter-cell MU user cannot be guaranteed by the high-level parameter "coordinating the initial CS value between cells, but because the cell identity of different cells" and/or the sequence index information ^ ^{1 seH are} inconsistent. The CS transition mode is the same. In an uplink CoMP system, there are usually multiple edge UEs in a cell. Since the cooperation set defined in R11 is user-specific, that is, the set of coordinated cells of each edge UE may be different, and the network side is difficult to pass the current R10. The cell-specific high-level parameters s are used to ensure that each coordinated cell of each edge UE uses the same sequence group. On the other hand, if too many cells use the same sequence group, it will also cause DMRS capacity. And the interference problem of other UEs within the multiple cells. Therefore, in the uplink CoMP system, considering the cooperative set characteristics, capacity, and interference problems, the network side selectively configures the same sequence group or different sequence groups for different cells. Therefore, compared with R10, the DMRS sequence hopping pattern inconsistency problem is more prominent in the uplink CoMP system. It can be seen that in the related art, the inconsistency of the CS hopping mode causes the PUSCH DMRS to have a CS collision problem between the MU users in the case that the OCC is not enabled, and in the case of the OCC enable, the OCC occurs. The problem of not being able to decode correctly affects the performance of MU users between cells. SUMMARY OF THE INVENTION The present invention provides a sequence hopping method for a DMRS to at least solve the problem in the above related art that affects the performance of an inter-cell MU user due to inconsistency in the CS hopping mode. According to an aspect of the present invention, a sequence hopping method for an uplink DMRS is provided. The sequence hopping method of the uplink DMRS according to the present invention includes the following steps: receiving information of a PUSCH DMRS sequence from a network side, where the information of the PUSCH DMRS sequence includes at least one of the following: CS hopping mode information, cell identity offset Information, sequence index offset information; determining a sequence hopping pattern and/or a sequence hopping pattern of the PUSCH DMRS according to the received information of the PUSCH DMRS sequence, and performing a sequence hopping pattern and/or sequence hopping according to the determined PUSCH DMRS The pattern performs a sequence jump. Preferably, receiving the information of the PUSCH DMRS sequence from the network side comprises: receiving, by the high layer signaling, information of the PUSCH DMRS sequence notified by the network side, where the high layer signaling is user-specific or cell-specific. Preferably, determining a sequence hopping mode of the PUSCH DMRS according to the received information of the PUSCH DMRS sequence, and performing sequence hopping according to the determined sequence hopping mode of the PUSCH DMRS comprises: determining the PUSCH DMRS according to the received CS hopping mode information. The sequence hopping mode is a subframe-level CS hopping mode, and the CS hopping is performed according to the subframe-level CS hopping mode; wherein, a fixed CS value is used in each subframe, and a hopping is used between the subframes. CS value. Preferably, the CS hopping according to the subframe level CS hopping mode includes: The subframe level CS hopping mode is obtained by one of the following formulas: (« _s ) = ∑ L ^c (3⁄4 - K ^{/ 2} J ⁺ ' 2 '' . Wherein, _"8 represents a slot index, N _b represents the number of SC-FDMA symbols in each slot included in the uplink, c O represents a pseudo-random sequence. Preferably, determining the sequence hopping pattern of the PUSCH DMRS according to the received information of the PUSCH DMRS sequence includes: acquiring a pseudo used in the PUSCH DMRS sequence hopping according to the received cell identifier offset information and/or sequence index offset information. The initial value of the random sequence, and the sequence jump pattern of the PUSCH DMRS is determined from the initial value of the pseudo random sequence. Preferably, the PUSCH DMRS sequence hopping includes at least one of the following: a PUSCH DMRS sequence group hopping, a PUSCH DMRS group sequence hopping, and a PUSCH DMRS sequence CS hopping. Preferably, the initial value of the pseudo-random sequence used when acquiring the PUSCH DMRS sequence group hop according to the received cell identifier offset information includes: obtaining the pseudo-random sequence initial value c _mit by one of the following formulas:

+ ch

30

Where A represents the cell identity and ^Δ represents the cell identity offset. Preferably, the initial value of the pseudo-random sequence used when acquiring the CS hop in the sequence of the PUSCH DMRS group or the PUSCH DMRS sequence according to the received cell identifier offset information includes: obtaining the initial value of the pseudo-random sequence by one of the following formulas^ t :

Where A represents the cell identity, ^Δ represents the cell identity offset, and ^ ^USeH represents the sequence index information. Preferably, the pseudo-random sequence initial value used when acquiring the sequence hopping in the PUSCH DMRS group or the CS hopping in the PUSCH DMRS sequence according to the received sequence index offset information includes: obtaining the pseudo-random sequence initial value c by using the following formula _{Mlt :}

Where A represents the cell identity, ^USeH represents the sequence index information, and ^Δ represents the sequence index offset. Preferably, the initial value of the pseudo-random sequence used when acquiring the sequence hopping in the PUSCH DMRS group or the CS hopping in the PUSCH DMRS sequence according to the received cell identifier offset information and the sequence index offset information includes: Find the pseudo-random sequence initial value c _mit :

N^ ^l + Ach

30 + Ach , 2 ⁵ + corpse + Δ

Where A represents the cell identity, ^Δ represents the cell identity offset, and ^ ^USeH represents the sequence index information, indicating the sequence index offset. According to another aspect of the present invention, a sequence hopping apparatus for an uplink DMRS is also provided. The sequence hopping apparatus of the uplink DMRS according to the present invention includes: a receiving module, configured to receive information of a PUSCH DMRS sequence from a network side, where the information of the PUSCH DMRS sequence includes at least one of the following: CS hopping mode information, a cell Identifying offset information, sequence index offset information; determining module, configured to determine a sequence hopping pattern and/or a sequence hopping pattern of the PUSCH DMRS according to the information of the PUSCH DMRS sequence received by the receiving module; the sequence hopping module is set to The sequence hopping is performed according to the sequence hopping pattern and/or the sequence hopping pattern of the PUSCH DMRS determined by the determining module. Preferably, the determining module includes: a hopping mode unit, configured to determine, according to the CS hopping mode information received by the receiving module, a sequence hopping mode of the PUSCH DMRS into a subframe-level CS hopping mode, where the subframe-level CS hopping The mode is to use a fixed CS value in each subframe during CS hopping and a hopping CS value between subframes. Preferably, the determining module further includes: a hopping pattern unit, configured to acquire pseudo-random used to perform at least one of the following PUSCH DMRS sequence hopping according to the cell identifier offset information and/or the sequence index offset information received by the receiving module Sequence initial value: PUSCH DMRS sequence group hopping, PUSCH DMRS group sequence hopping, PUSCH DMRS sequence CS hopping; and determining a sequence hopping pattern of the PUSCH DMRS according to the pseudo random sequence initial value. According to the present invention, the sequence hopping pattern and/or the sequence hopping pattern of the PUSCH DMRS are determined according to the received information of the PUSCH DMRS sequence from the network side, and then the sequence hopping is performed, thereby solving the related art in the CS. The inconsistency of the hopping mode affects the performance of MU users between cells, and improves the resource utilization of the system. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, In the drawings: FIG. 1 is a flowchart of a sequence hopping method of an uplink demodulation reference signal DMRS according to an embodiment of the present invention; FIG. 2 is a sequence hopping apparatus for an uplink demodulation reference signal DMRS according to an embodiment of the present invention; FIG. 3 is a structural block diagram of a sequence hopping apparatus for an uplink demodulation reference signal DMRS according to a preferred embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. According to an embodiment of the present invention, a sequence hopping method for an uplink demodulation reference signal DMRS is provided. 1 is a flowchart of a sequence hopping method of an uplink demodulation reference signal DMRS according to an embodiment of the present invention. As shown in FIG. 1, the method includes the following steps: Step S102: Receive information of a PUSCH DMRS sequence from a network side, The information of the PUSCH DMRS sequence includes at least one of the following: CS hopping mode information, cell identifier offset information, and sequence index offset information; Step S104: Determine a sequence hopping pattern and/or a sequence hopping pattern of the PUSCH DMRS according to the information of the received PUSCH DMRS sequence, and perform sequence hopping according to the determined sequence hopping pattern and/or sequence hopping pattern of the PUSCH DMRS. change. Through the above steps, determining the sequence hopping pattern and/or the sequence hopping pattern of the PUSCH DMRS according to the received information of the PUSCH DMRS sequence from the network side, and then performing the sequence hopping manner, solving the related art in the CS The inconsistency of the hopping mode affects the performance of MU users between cells, and improves the resource utilization of the system. Preferably, in step S102, information of a PUSCH DMRS sequence notified from the network side may be received through higher layer signaling, where the higher layer signaling is user-specific or cell-specific. For example, the high layer signaling may be, but not limited to, one of the following: signaling for carrying CS hopping mode information, signaling for carrying cell identity offset information, signaling for carrying sequence index offset information. . Preferably, in step S104, the following two situations may be used: Case 1: determining, according to the received CS hopping mode information, a sequence hopping mode of the PUSCH DMRS into a subframe-level CS hopping mode, and according to the subframe The CS hopping mode performs CS hopping; wherein, a fixed CS value is used in each subframe, and a hopping CS value is used between subframes. For example, CS hopping according to the subframe level CS hopping mode includes: The subframe level CS hopping mode is obtained by one of the following formulas:

/ ² J+ - 2 ⁱ ;

"TM(" _s ) =∑:=. c(16A^ _b .L" _s /2" + 0.2''; where, represents a slot index, indicating single carrier frequency division multiple access included in each uplink slot (Single

Carrier-Frequency Division Multiple Access (SC-FDMA) symbol number, ^c( " ^s ) indicates a pseudo-random sequence. In particular, for CS hopping mode, the following two processing methods can be used: Mode one, for R11 or above For the version of the user, you can use the sub-frame level or the slot-level hopping. In the second mode, if the previous R11 user does not receive the CS hopping mode signaling, the slot-level hopping is performed by default. The hopping mode may include: a sub-frame hopping mode (eg, may be named inter-subframe hopping mode) and a P-slot hopping mode (eg, may be named intraAndinter-subframe hopping mode ) For example, the inter-subframe hopping mode may indicate that the network side instructs the receiving side to perform CS hopping according to the subframe level frequency, that is, the receiving side uses a fixed CS value in each subframe, and the hopping CS is used between the subframes. Value; intraAndinter-subframe oi/e can be the CS hopping mode in R10. Case 2: Acquire an initial value of the pseudo-random sequence used in the hopping of the PUSCH DMRS sequence according to the received cell identifier offset information and/or sequence index offset information, and determine a sequence hop of the PUSCH DMRS from the initial value of the pseudo-random sequence Change the pattern. The PUSCH DMRS sequence hopping may include at least one of the following: a PUSCH DMRS sequence group hopping, a PUSCH DMRS group sequence hopping, and a PUSCH DMRS sequence CS hopping. Therefore, Case 2 can be divided into the following situations:

(1) The initial value of the pseudo-random sequence used when acquiring the PUSCH DMRS sequence group hopping according to the received cell identifier offset information includes: obtaining the initial value of the pseudo-random sequence ^ t by one of the following formulas:

NZ + Ach

30

Where A represents the cell identity and ^Δ represents the cell identity offset.

(2) The initial value of the pseudo-random sequence used when acquiring the CS hop in the PUSCH DMRS group sequence or the PUSCH DMRS sequence according to the received cell identifier offset information includes: obtaining the initial value of the pseudo-random sequence by one of the following formulas^ t :

NZ + Ach

30

Where N is the cell identity, indicating the cell identity offset, and ^useH is the sequence index information. (3) The initial values of the pseudo-random sequence used to obtain the sequence hopping in the PUSCH DMRS group or the CS hopping in the PUSCH DMRS sequence according to the received sequence index information include: The pseudo-random sequence initial is obtained by the following formula Value ^ _{t :}

Where ^^ represents the cell identifier, ^ ^USUH represents the sequence index information, ^^ represents the sequence index bias

(4) The initial value of the pseudo-random sequence used when acquiring the sequence hopping in the PUSCH DMRS group or the CS hopping in the PUSCH DMRS sequence according to the received cell identifier offset information and the sequence index offset information includes: Find the initial value of the pseudo-random sequence ^:

N^ ^l + Ach

+ Δ

30 + Ach , 2 ⁵ + corpse + Δ

Where A represents the cell identity, ^Δ represents the cell identity offset, and ^ ^USeH represents the sequence index information, indicating the sequence index offset. Then, the sequence hopping pattern of the PUSCH DMRS is determined based on the pseudo random sequence initial value determined by the above situation. With the preferred embodiment, corresponding sequence hopping is performed on the received information of different PUSCH DMRS sequences from the network side, so as to improve the processing efficiency and effectiveness of the system. Corresponding to the foregoing method, the embodiment of the present invention further provides a sequence hopping device for an uplink demodulation reference signal DMRS. 2 is a structural block diagram of a sequence hopping apparatus for an uplink demodulation reference signal DMRS according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes: a receiving module 22 configured to receive information of a PUSCH DMRS sequence from a network side. The information of the PUSCH DMRS sequence includes at least one of the following: CS hopping mode information, cell identifier offset information, sequence index offset information, and a determining module 24 coupled to the receiving module 22, configured to receive according to the receiving module 22 The information of the PUSCH DMRS sequence determines the sequence hopping pattern and/or the sequence hopping pattern of the PUSCH DMRS; the sequence hopping module 26 is coupled to the determining module 24, and is set to the sequence hopping pattern of the PUSCH DMRS determined according to the determining module 24 and / or sequence jump pattern for sequence jumps. Through the foregoing apparatus, the determining module 24 determines a sequence hopping mode and/or a sequence hopping pattern of the PUSCH DMRS according to the information of the PUSCH DMRS sequence received from the network side received by the receiving module 22, and the sequence hopping module 26 follows the sequence of the PUSCH DMRS. The hopping mode and/or the sequence hopping pattern perform sequence hopping, which solves the problem that the performance of the MU user between cells is affected by the inconsistency of the CS hopping mode in the related art, and improves the resource utilization of the system. 3 is a structural block diagram of a sequence hopping apparatus for an uplink demodulation reference signal DMRS according to a preferred embodiment of the present invention. As shown in FIG. 3, the determining module 24 may include: a hopping mode unit 242, configured to receive according to the receiving module 22 The obtained CS hopping mode information determines that the sequence hopping mode of the PUSCH DMRS is a subframe-level CS hopping mode, wherein the subframe-level CS hopping mode is to use a fixed CS value in each subframe when CS hopping is performed. , Use the CS value of the transition between subframes. Preferably, the determining module 24 further includes: a hopping pattern unit 244, configured to perform at least one of the following PUSCH DMRS sequence hopping according to the cell identifier offset information and/or the sequence index offset information received by the receiving module 22 Pseudo-random sequence initial values: PUSCH DMRS sequence group hopping, PUSCH DMRS group sequence hopping, CS hopping of PUSCH DMRS sequence; and determining a sequence hopping pattern of PUSCH DMRS according to the initial value of the pseudo-random sequence. The implementation process of the above embodiment will be described in detail below in conjunction with the preferred embodiments and the accompanying drawings. Embodiment 1 This embodiment proposes a sequence hopping method for an uplink demodulation reference signal (DMRS) to ensure orthogonal performance or OCC decoding performance of MU users between different cells. In the implementation process, the sequence hopping method of the uplink demodulation reference signal may include the following steps: Step 1: The network side notifies the receiving side of the existing PUSCH DMRS sequence hopping related information, but also notifies the receiving side. CS hopping mode information and/or cell identification offset information and/or sequence index offset information of the PUSCH DMRS sequence; Step 2, the receiving side receives the PUSCH DMRS sequence hopping related information and/or CS hopping mode information and After the cell identifier offset information and/or the sequence index offset information, the sequence hopping pattern and the hopping pattern of the DMRS are determined according to the received information content. Specifically, if the receiving side does not receive the CS hopping mode information and/or the cell identities information and/or the sequence index offset information, the sequence hopping mode of the DMRS is determined according to an existing method in R10. Preferably, in step 1, the process of the network side notifying the CS hopping mode information to the receiving side has the following characteristics: The network side notifies the receiving side of the CS hopping mode information by using the high layer signaling, where the attribute of the higher layer signaling is the user Depending on the ue-specific or cell-specific. The CS hopping mode may include: a sub-frame hopping mode (for example, may be named as inter-subframe hopping mode) and a P-slot hopping mode (for example, may be named intraAndinter-subframe hopping mode) Wozhong. For example, the inter-subframe hopping mode may indicate that the network side instructs the receiving side to perform CS hopping according to the subframe level frequency, that is, the receiving side uses a fixed CS value in each subframe, and the hopping CS is used between the subframes. Value; and intraAndinter-subframe mode, which is the existing CS hopping mode in R10. Preferably, in the inter-subframe hopping mode, the following formula can be used: (" _s ) = ∑ c. (8W _b · n _s 12" + · 2' or " _PN (" _s ) = ∑: =. c ( 16 _b · n _s 12" + ) · 2'. In particular, when the receiving side does not receive the CS hopping mode information, the receiving side performs CS hopping according to the R10 existing hopping mode. Preferably, in step 1. The network side indicates the cell identity offset signaling and/or the sequence index offset signaling to the receiving side through the upper layer. For example, the high layer signaling may be user-specific or cell-specific. In step 2, after receiving the cell identity offset signaling information, the receiving side determines, according to the information, an initial value of the pseudo random sequence used in the PUSCH DMRS sequence group hopping. Preferably, the receiving side PUSCH DMRS sequence group hopping The initial value of the pseudo-random sequence used may be one of the following:

+ ch

30

Where AcA represents a cell identity offset. If the receiving side does not receive the cell identity offset signaling information, the receiving side uses the existing method in R10 to determine the initial value of the pseudo random sequence used in the PUSCH DMRS sequence group hopping by default. In step 2, after receiving the cell identity offset signaling and/or sequence index offset signaling, the receiving side determines, according to the information, an initial value of the pseudo random sequence used in the sequence hopping in the PUSCH DMRS group. Preferably, the initial value of the pseudo random sequence used in the sequence hopping in the receiving side PUSCH DMRS group may be one of the following:

N^ ^l + Ach

30

Where AcA represents the cell identity offset and ^Δ represents the sequence index offset. If the receiving side does not receive the cell identifier offset and the sequence index offset signaling, the receiving side uses the existing method in R10 to determine the initial value of the pseudo random sequence used in the sequence hopping in the PUSCH DMRS group by default. In step 2, after receiving the cell identity offset signaling and/or sequence index offset signaling, the receiving side determines, according to the information, an initial value of the pseudo random sequence used for CS hopping of the PUSCH DMRS sequence. Preferably, the pseudo-random sequence initial value used by the receiving side DMRS cyclic shift sequence hopping may be one of the following:

+ Δ

Where AcA represents the cell identity offset and ^Δ represents the sequence index offset. If the receiving side does not receive the cell identifier offset signaling and the sequence index offset signaling, the receiving side uses the existing method in R10 to determine the initial value of the pseudo random sequence used for the CS hopping of the PUSCH DMRS sequence by default. In step 2, after the receiving side determines the PUSCH DMRS sequence group/intra-group sequence and the pseudo-random sequence initial value used by the CS hopping of the sequence, the PUSCH DMRS sequence hopping pattern is determined according to the determined pseudo-random sequence. In this embodiment, the CS collision problem between the MU users in the uplink CoMP system and the problem that the OCC cannot be correctly decoded are effectively solved, thereby improving the performance of the inter-cell MU users in the uplink CoMP system and improving the utilization of system resources. Embodiment 2 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a signal to the receiving side through a higher layer to the receiving side. 3⁄4p«g signaling And sending CS hopping mode signaling. Then, when the receiving side receives the Disable-sequence-group-hopping signaling and the CS hopping mode signaling, the receiving side performs CS hopping according to the information indicated by the CS hopping mode signaling. , specifically:

(1) When the content of the CS hopping mode signaling information is «ter-TM6/ra hopping mode, the receiving side will hop along with the subframe change, preferably hopping according to the mode described in the following formula:

"TM("

/2" + '·)·2'"TM(" _s ) =∑:=. c(16< _b .L" _s /2" ₊ 0.2''

N PUSCH

30 (2) When the CS hopping mode information content is intraAndinter-subframe hopping mode, the receiving side may hop with the time slot change, that is, CS hopping in the same manner as the R10 existing mode:

⁽ "s) =∑ _i=0 ^c ( ⁸ · +'■)· ² '

N cell

^C imt

30 Embodiment 3 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a message to the receiving side through a high layer. 3⁄4a«e«ce-gro -/z (3⁄4p«g letter Then, the CS hopping mode signaling is sent. Secondly, when the receiving side receives the Disable-sequence-group-hopping signaling, and does not receive the CS hopping mode signaling, the receiving side performs the CS hopping according to the R10 existing mode. which is

⁽ "s) =∑ _i=0 ^c ( ⁸ · +'■)· ² '

N cell

PUSCH

^C imt

30 Embodiment 4 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a high-level to the receiving side through the upper layer. 3⁄43⁄4^/e->«3⁄43⁄4e«ce-gro -/z (3⁄4p«g signaling, sending

CS hopping mode signaling. Second, the receiving side receives the CS hopping mode signaling, ^ k DisaMe-sequence-group-hopping signaling, and the receiving side performs CS hopping according to the information indicated by the CS hopping mode signaling, specifically:

"TM("

/2" + '·)·2'· Rt÷ "TM (" _s ) =∑:=. 16 · [n _s 12" + ) ·

N cell

^C imt

30

(2) When the CS hopping mode information content is intraAndinter-subframe hopping mode, the receiving side hops with the slot change, that is, CS hopping in the same way as the R10 existing mode:

∑7

N cell

PUSCH

^C imt

30 The receiving side performs DMRS sequence group hopping or intra-group sequence hopping according to the RIO existing mode. Embodiment 5 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a signal to the receiving side through a higher layer to the receiving side. 3⁄4a«e (3⁄4p«g signaling Sending CS hopping mode signaling. Secondly, the receiving side does not receive the /3⁄4ra ^«^e«ce-gTO^-/zo^«g signaling, and does not receive the CS hopping mode signaling, then the receiving side The CS jump will be performed according to the existing R10 mode, g卩:

∑7

N cell

^C imt

30 The receiving side performs DMRS sequence group hopping or intra-group sequence hopping according to the RIO existing mode. Embodiment 6 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a signal to the receiving side through a higher layer to the receiving side. 3⁄4p«g signaling Send

CS hopping mode signaling, cell identity offset signaling. Secondly, the receiving side receives the /3⁄43⁄4?^e^e«ce-gTO -/z (3⁄4p «g signaling, CS hopping mode signaling, cell identity offset signaling, then the receiving side will follow the CS hopping mode The signaling indicated by the signaling and the cell identity offset signaling performs CS hopping, specifically:

(1) When the CS hopping mode signaling information content is inter-subframe hopping, the receiving side will hop along with the subframe change, and preferably hops according to the mode described in the following formula:

(" _s ) =∑:=. 16 · L" _s 12" + ) · 2'

+ Ach

(2) When the CS hopping mode information content is intraAndinter-subframe hopping mode, the receiving side performs CS hopping along with the time slot change, that is, CS hopping in the same manner as the R10 existing mode:

Embodiment 7 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a /3⁄43⁄4^/e->«3⁄43⁄4e«ce-gro -/z to the receiving side through a high layer. 3⁄4p «g signaling, sending

CS hopping mode signaling, cell identity offset signaling. Second, if the receiving side does not receive the Disable-sequence-group-hopping signaling, and receives the CS hopping mode signaling and the cell identity offset signaling, the receiving side will be biased according to the CS hopping mode signaling and the cell identity. The information indicated by the signaling performs sequence group/group sequence hopping and CS hopping, specifically: (1) when the receiving side to the received cell-specific sequence hopping information is Group-hopping- abled signaling, receiving The side will perform sequence group hopping according to the information indicated by the cell identity offset signaling: The sequence group hopping function is disabled.

The sequence group hopping function is turned on.

(2) When the cell-specific sequence hopping information received by the receiving side is

The receiving side will perform intra-group sequence hopping according to the information indicated by the cell identity offset signaling: ί c{n _s ) If the intra-group sequence hopping function is enabled and the sequence group hopping function is turned off

0 other

On the other hand, the receiving side performs CS hopping according to the information indicated by the CS hopping mode signaling and the cell identity offset signaling, specifically:

(1) When the CS hopping mode signaling information content is a ter-5 rame hopping mode pair, the receiving side will hop with the subframe change, and preferably hops according to the mode described in the following formula:

Or (« _s ) =∑L ^c ( ¹ 3⁄4-K ^/2 J ⁺ ' ² ''

(2) When the information content of the CS hopping mode is intraAndinter-siibframe hopping mode, the receiving side will hop with the time slot change, that is, according to the existing R10 mode:

"PN (" _s ) =∑. ₌₀ . " _s + ,·) · 2'

Embodiment 8 This embodiment provides a sequence hopping method for an uplink DMRS, and the method may be: First, the network side sends to the receiving side through the upper layer / 3⁄4ra ^ee «ce-gro -/z (3⁄4p «g signaling, sending

CS hopping mode signaling, cell identity offset signaling. Second, the receiving side does not receive the Disable-sequence-group-hopping signaling and the CS hopping mode signaling, but receives the cell identity offset signaling, and the receiving side performs the sequence according to the information indicated by the cell identity offset signaling. Group/group sequence hopping and CS hopping, specifically:

(1) When the receiving-to-received cell-specific sequence hopping information is Group-hopping-enabled signaling, the receiving side performs sequence group hopping according to the information indicated by the cell identity offset signaling: sequence group hopping Function off

Can open

(2) When the cell-specific sequence hopping information received by the receiving side is &

At the time of the request, the receiving side performs the intra-group sequence hopping according to the information indicated by the cell identity offset signaling:

(n _s ) if the sequence hopping function in the group is on and the sequence group hopping function is off

other

The receiving side performs CS hopping according to the information indicated by the R10 existing CS hopping mode and the cell identity offset signaling.

∑7

Embodiment 9 This embodiment provides a sequence hopping method for an uplink DMRS, and the method may be: First, the network side sends to the receiving side through the upper layer / 3⁄4ra ^ee«ce-gro -/z (3⁄4p«g signaling, sending

CS hopping mode signaling, cell identity offset signaling, sequence index offset signaling. Secondly, the receiving side receives the /3⁄43⁄4?^e^e«ce-gTO -/z (3⁄4p«g signaling, CS hopping mode signaling, cell identity offset signaling, and sequence index offset signaling, then receives The side performs CS hopping according to the information indicated by the CS hopping mode signaling and the cell identity offset signaling, specifically:

(1) When the content of the CS hopping mode signaling information is «ter-TM6/ra hopping mode, the receiving side will hop with the subframe change, preferably hopping according to the mode described in the following formula:

. l6N^ _b · [n _s 12" + 2'

(2) When the information content of the CS hopping mode is intraAndinter-subframe hopping mode, the receiving side hops with the time slot change, that is, according to the existing mode of R10:

Embodiment 10 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a signal to the receiving side through a higher layer to the receiving side. 3⁄4p«g signaling Send

CS hopping mode signaling, cell identity offset signaling, sequence index offset signaling. Second, the receiving side does not receive the Disable-sequence-group-hopping signaling, and receives the CS hopping mode signaling, the cell identity offset signaling, and the sequence index offset signaling, and the receiving side will follow the CS hopping mode letter. The information indicated by the cell identifier offset signaling and the sequence index offset signaling performs sequence group/group sequence hopping and CS hopping, specifically: (1) When the receiving side-to-received cell-specific sequence hopping information is a Group-hopping-enabled command, the receiving side performs sequence group hopping according to the information indicated by the cell identity offset signaling: sequence group hopping Function off

h(« _s ) ^: can be turned on

(2) When the cell-specific sequence hopping information received by the receiving side is &3⁄4? signaling, the receiving side performs intra-group sequence hopping according to the information indicated by the cell identity offset signaling and the sequence index offset signaling. : c(n _s ) if the sequence hopping function in the group is on and the sequence group hopping function is off

0 other

+ Ach •2 ⁵ + J ^USCH +A

On the other hand, the receiving side performs cs hopping according to the information indicated by the cs hopping mode signaling, the cell identity offset signaling, and the sequence index offset, specifically:

"TM("

/2" + '·)·2'· (" _s ) =∑ 6Ν^ · [n _s 12"10) - 2'

+ Ach •2 ⁵ + J ^USCH +A

(2) When the content of the CS hopping mode information is intraAndinter-subframe hopping mode, the receiving side may hop with the time slot change, that is, according to the existing mode of R10:

· +'■)· 2''

Embodiment 1 This embodiment provides a sequence hopping method for an uplink DMRS. The method may be: First, the network side sends a message to the receiving side through a higher layer to the receiving side. 3⁄4p«g Order, send

CS hopping mode signaling, cell identity offset signaling, sequence index offset signaling. Second, the receiving side does not receive the Disable-sequence-group-hopping signaling and the CS hopping mode signaling, but receives the cell identifier offset signaling and the sequence index offset signaling, and the receiving side will be offset according to the cell identifier. The information indicated by the signaling and sequence index offset signaling performs sequence group/group sequence hopping and CS hopping, specifically:

Can open

0 other

+ Ach ■2 ⁵ + + Δ

On the other hand, the receiving side performs CS hopping according to the information indicated by the R10 existing CS hopping mode and the cell identity offset signaling and the sequence index offset signaling:

!. ₌₀ ^C ( ⁸ W _S y _mb · +'■)· 2

In summary, the embodiment of the present invention relates to a sequence hopping method for an uplink demodulation reference signal in a coordinated multi-point communication system, which solves the problem that the performance of the MU user between cells is affected by the inconsistency of the CS hopping mode in the related art. Improve the resource utilization of the system. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device so that they may be stored in the storage device by the computing device, or they may be separately fabricated into individual integrated circuit modules, or Multiple modules or steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. An uplink demodulation reference signal DMRS sequence hopping method, comprising the following steps:

Receiving information of a physical uplink shared channel (PUSCH) DMRS sequence from the network side, where the information of the PUSCH DMRS sequence includes at least one of the following: cyclically shifted CS hopping mode information, cell identifier offset information, and sequence index offset information. ;

Determining a sequence hopping pattern and/or a sequence hopping pattern of the PUSCH DMRS according to the received information of the PUSCH DMRS sequence, and performing sequence hopping according to the determined sequence hopping pattern and/or sequence hopping pattern of the PUSCH DMRS change.

2. The method of claim 1, wherein receiving information of the PUSCH DMRS sequence from the network side comprises:

Receiving, by the high layer signaling, information of the PUSCH DMRS sequence notified from the network side, where the higher layer signaling is user-specific or cell-specific.

The method according to claim 1, wherein the sequence hopping mode of the PUSCH DMRS is determined according to the received information of the PUSCH DMRS sequence, and the sequence hopping is performed according to the determined sequence hopping mode of the PUSCH DMRS. Includes:

Determining, according to the received CS hopping mode information, a sequence hopping mode of the PUSCH DMRS into a subframe-level CS hopping mode, and performing CS hopping according to the subframe-level CS hopping mode; wherein, in each A fixed CS value is used within a subframe, and a CS value of the transition is used between subframes.

4. The method according to claim 3, wherein performing CS hopping according to the subframe level CS hopping mode comprises:

The sub-frame level CS hopping pattern is derived by one of the following equations: (« _s ) = ∑ L ^c (3⁄4 - K ^{/ 2} J ⁺ '2''_;

"TM(" _s ) =∑:=. c(16A^ _b .L" _s /2" + 0.2''; where " ₈ represents a slot index, indicating the number of single-carrier frequency division multiple access SC-FDMA symbols included in each uplink slot, c O represents Pseudo-random sequence. The method according to claim 1, wherein determining the sequence hopping pattern of the PUSCH DMRS according to the received information of the PUSCH DMRS sequence comprises:

Obtaining a pseudo-random sequence initial value used in the PUSCH DMRS sequence hopping according to the received cell identifier offset information and/or sequence index offset information, and determining the sequence of the PUSCH DMRS from the pseudo-random sequence initial value Jump pattern. The method according to claim 5, wherein the PUSCH DMRS sequence hopping comprises at least one of the following:

PUSCH DMRS sequence group hopping, PUSCH DMRS group sequence hopping, CSSCH hopping of PUSCH DMRS sequence. The method according to claim 5, wherein the initial value of the pseudo-random sequence used when acquiring the PUSCH DMRS sequence group hop according to the received cell identifier offset information comprises:

The initial value of the pseudo-random sequence is obtained by one of the following formulas

+ ch

30

Where N is the cell identity and AcA is the cell identity offset. The method according to claim 5, wherein the initial values of the pseudo-random sequence used when acquiring the CS hop in the PUSCH DMRS group sequence or the PUSCH DMRS sequence according to the received cell identity offset information include: One of the initial values of the pseudo-random sequence ^:

', _- where A denotes the cell identity, ^Δ denotes the cell identity offset, ^ ^USeH denotes the sequence indexϊ The method according to claim 5, wherein the pseudo-random sequence initial value used when acquiring the sequence hopping in the PUSCH DMRS group or the CS hopping in the PUSCH DMRS sequence according to the received sequence index offset information includes:

The pseudo-random sequence initial value c _mit is obtained by the following formula:

Where, N denotes the cell ^{identification,} useH indicates sequence index information, _∞ represents eight partial sequence index

The method according to claim 5, wherein, according to the received cell identifier offset information and the sequence index offset information, a CS hop in a PUSCH DMRS group or a CS hop in a PUSCH DMRS sequence is used. The initial values of the pseudo-random sequence include:

N^ ^l + Ach

+ Δ

30

+ Ach ' 2 ⁵ + corpse

Wherein, N represents a cell identifier, indicating a cell identifier offset, "^ represents sequence index information, and Δ _∞ represents a sequence index offset.

11. An uplink demodulation reference signal DMRS sequence hopping device, comprising:

The receiving module is configured to receive the information of the physical uplink shared channel PUSCH DMRS sequence from the network side, where the information of the PUSCH DMRS sequence includes at least one of the following: cyclically shifting CS hopping mode information, cell identifier offset information, Sequence index offset information;

a determining module, configured to determine a sequence hopping mode and/or a sequence hopping pattern of the PUSCH DMRS according to the information of the PUSCH DMRS sequence received by the receiving module;

The sequence hopping module is configured to perform sequence hopping according to the sequence hopping mode and/or the sequence hopping pattern of the PUSCH DMRS determined by the determining module. The device according to claim 11, wherein the determining module comprises:

a hopping mode unit, configured to determine, according to the CS hopping mode information received by the receiving module, a sequence hopping mode of the PUSCH DMRS into a subframe level CS hopping mode, where the subframe level CS hopping The variable mode is to use a fixed CS value in each subframe during CS hopping, and a hopping CS value between subframes.

The device according to claim 11 or 12, wherein the determining module further comprises: a hopping pattern unit, configured to receive the cell identity offset information and/or the sequence according to the receiving module The index offset information acquires an initial value of the pseudo random sequence used to perform at least one of the following PUSCH DMRS sequence hopping: PUSCH DMRS sequence group hopping, PUSCH DMRS group sequence hopping, PUSCH DMRS sequence CS hopping; The pseudo random sequence initial value determines a sequence hopping pattern of the PUSCH DMRS.