WO2012034444A1

WO2012034444A1 - Method and device for notifying pilot pattern in inter-cell channel measurement

Info

Publication number: WO2012034444A1
Application number: PCT/CN2011/076890
Authority: WO
Inventors: 姜静
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-09-17
Filing date: 2011-07-06
Publication date: 2012-03-22
Also published as: CN102412940A; CN102412940B

Abstract

A method and a device for notifying a pilot pattern in inter-cell channel measurement. The method comprises: using 2 bits in signaling to represent the number of ports (S310), using 3 bits to represent a position index of a channel state information reference signal (CSI-RS) port 0 (S320), and using 1 bit to represent a pattern offset indication in port configuration of two antennas or four antennas; or using 2 bits in signaling to represent the number of ports, and using 4 bits to represent a position index of a CSI-RS port 0 in the case of four antennas; or using 2 bits in signaling to represent the number of ports, and using 4 bits in combination with the number of extra bits in the number of ports to represent a position index of a CSI-RS port 0 in the case of two antennas.

Description

Notification method and device for inter-cell channel measurement pilot pattern

Technical field

The present invention relates to the field of communications, and in particular, to a method and apparatus for notifying an inter-cell channel measurement pilot pattern. Background technique

The two pilots of the Advanced Long Term Evolution (LTE-Advanced) system, namely the channel state information reference signal, have been defined in the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) 56 conferences ( Channel State Information-Reference Signals (CSI-RS) and Demodulation Reference Signals (DMRS), wherein the channel state information reference signal is cell-specific, and the channel state information reference signal is relatively The demodulation pilot is more sparsely distributed over time-frequency resources.

The CSI-RS pattern is determined in the LTE 61bis conference, as shown in Figure 1 (a) to Figure 1 (d), where Figure 1 (a) is the normal cyclic prefix (Normal CP) CSI-RS in time division duplex The eight-antenna CSI-RS pattern applicable to both (TDD) and frequency division duplex (FDD), Figure 1 (b) is the eight-antenna CSI-RS pattern of the Normal CP CSI-RS in TDD, Figure 1 (c) It is an eight-antenna CSI-RS pattern that is applicable to both CDD-RS of extended cyclic prefix (Extended CP) and TDD and FDD. Figure 1 (d) is an eight-antenna CSI-RS pattern for CSI-RS of Extended CP in TDD.

Although the prior art has proposed a technique for signaling a CSI-RS pattern according to signaling, how to implement the notification by using a technical means has not been defined. Summary of the invention

The technical problem to be solved by the present invention is to provide a method and apparatus for notifying a channel pattern measurement pilot pattern to implement notification of a channel state information reference signal (CSI-RS) pattern.

In order to solve the above technical problem, the present invention first provides a method for notifying an inter-cell channel measurement pilot pattern, including:

In the signaling, 2 bits are used to indicate the number of ports, 3 bits are used to indicate the position index of the channel state information reference signal (CSI-RS) port 0, and 1 bit is used to indicate the pattern offset in the configuration of the two-antenna or four-antenna port. Indication; or

In the signaling, 2 bits are used to indicate the number of ports, and 4 bits are used to indicate the CSI-RS port when four antennas are used.

0 position index; or

In the signaling, 2 bits are used to indicate the number of ports, and the number of extra bits in the number of ports is combined and 4 bits are used to indicate the position index of CSI-RS port 0 at the time of two antennas.

Preferably, when the eight-antenna CSI-RS pattern is divided into two four-antenna CSI-RS patterns:

When the value of the pattern offset indication is 0, the four antennas use the normal cyclic prefix (CP)

The CSI-RS is a pattern of 0, 1, 2, 3 ports in the eight-antenna CSI-RS pattern applicable to both time division duplex (TDD) and frequency division duplex (FDD);

When the value of the pattern offset indication is 1, the four antennas use the CSI-RS of the normal CP, and the patterns of the 5, 6, 7 and 8 ports in the eight-antenna CSI-RS pattern applicable to both TDD and FDD.

Preferably, when the four antenna CSI-RS pattern is divided into two two antenna CSI-RS patterns:

When the value of the pattern offset indication is 0, the four antennas use the normal CP CSI-RS in the eight-antenna CSI-RS pattern applicable to both time division duplex (TDD) and frequency division duplex (FDD), 1 , 2, 3 port pattern;

Preferably, in the step of indicating the pattern offset indication in the configuration of the two antenna ports by using 1 bit: when the value of the pattern offset indication is 0, the four antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked by the position of the antenna of the four antennas.

When the value of the pattern offset indication is 1, it indicates that the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as the position of the antenna of the four antennas.

Preferably, in the step of indicating the position index of the CSI-RS port 0 when 4 bits are used, the position index of the CSI-RS port 0 when representing the four antennas is used to represent the port index.

Preferably, in the step of combining the number of bits in the port number and using 4 bits to indicate the position index of the CSI-RS port 0 when the two antennas are:

When the number of CSI-RS ports is 0, it indicates that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as the position of the antenna of the four antennas, or the CSI- When the number of RS ports is 0, it indicates that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is the position of the antenna of the four antennas.

In order to solve the above technical problem, the present invention also provides a notification device for inter-cell channel measurement pilot pattern,

The device is configured to: use 2 bits to indicate the number of ports in the signaling, 3 bits to indicate the position index of the channel state information reference signal (CSI-RS) port 0, and 1 bit to indicate the configuration of the two antennas or the four antenna ports. The following pattern offset indication; or

The device is configured to: use 2 bits to indicate the number of ports in the signaling, and 4 bits to indicate the position index of the CSI-RS port 0 when the four antennas are; or

The device is configured to: use 2 bits to indicate the number of ports in the signaling, combine the number of extra bits in the number of ports, and use 4 bits to indicate the position index of the CSI-RS port 0 at the time of the two antennas.

Preferably, when the eight-antenna CSI-RS pattern is divided into two four-antenna CSI-RS patterns, the device is set to:

The pattern of 0, 1, 2, 3 ports in the eight-antenna CSI-RS pattern applicable to the four-antenna CSI-RS with normal cyclic prefix (CP) in both time division duplex (TDD) and frequency division duplex (FDD) When the value of the pattern offset indication is set to 0;

The four antennas use the CSI-RS of the normal CP to set the value of the pattern offset indication to 1 when the patterns of the 5, 6, 7 and 8 ports in the eight-antenna CSI-RS pattern applicable to both TDD and FDD are used. Preferably, when the four-antenna CSI-RS pattern is divided into two two-antenna CSI-RS patterns, the device is set to:

The four antennas use the normal cyclic prefix (Normal CP) CSI-RS for both the time division duplex (TDD) and the frequency division duplex (FDD). The eight-antenna CSI-RS pattern is 0, 1, 2, 3 ports. In the pattern, the value of the pattern offset indication is set to 0;

Four antennas use the CSI-RS of Normal CP to set the value of the pattern offset indication to 1 for the 5, 6, 7 and 8 port patterns in the eight-antenna CSI-RS pattern applicable to both TDD and FDD.

Preferably, the apparatus is arranged to indicate a pattern offset indication in a two antenna port configuration using 1 bit in the following manner:

The value of the pattern offset indication is 0, indicating that the four-antenna CSI-RS pattern is split into two antennas.

The position of the CSI-RS pattern is marked by the position of the antenna of the four antennas.

Preferably, the apparatus is configured to use the position index to characterize the port index when the location index of the CSI-RS port 0 is set to 4 bits.

Preferably, the device is configured to combine the number of extra bits in the port number in the following manner and use 4 bits to indicate the position index of the CSI-RS port 0 when the two antennas are:

Compared with the prior art, the method and device for notifying the channel measurement pilot pattern provided by the foregoing technical solution realize the notification of the channel state information reference signal (CSI-RS) pattern, and reduce the signaling of the CSI-RS pattern notification. The overhead increases the flexibility of CSI-RS pattern selection, improves system performance, and improves the efficiency of pattern utilization as much as possible. BRIEF abstract The drawings are used to explain the invention, together with the embodiments of the invention, and are not intended to limit the invention. In the drawing:

Figure 1 (a) is an eight-antenna CSI-RS pattern applicable to both CDD-RS of Normal CP in TDD and FDD in the prior art;

Drawing

Figure 1 (c) is an eight-antenna CSI-RS pattern for the CSI-RS of the Extended CP in both TDD and FDD in the prior art;

Figure 1 (d) is a eight-antenna CSI-RS pattern dedicated to TDD of the CSI-RS of the Extended CP in the prior art;

Figure 2 (a) is a two-antenna CSI-RS pattern of the CSI-RS of the Normal CP in both FDD and TDD in the prior art;

Figure 2 (b) is a four-antenna CSI-RS pattern of the CSI-RS of the Normal CP in both FDD and TDD in the prior art;

FIG. 3 is a schematic flow chart of Embodiment 1 of the present invention. Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, in which the technical problems can be solved by the application of the technical means, and the realization of the technical effect can be fully understood and implemented.

All are within the scope of protection of the present invention.

The CSI-RS of antenna 2, antenna 4, and antenna 8 uses a nested structure, that is, resource unit (RE) positions occupied by two antennas, four antennas, and eight antenna pilots, and code division multiplexing (CDM) + time division The multiplexing (TDM) multiplexing method is the same, and the eight-antenna pattern can be divided into two four-antenna CSI-RS patterns. The four-antenna pattern can be divided into two two-antenna CSI-RS patterns, as shown in Fig. 2 (a). And Figure 2 (b). Therefore, for such a nested structure, the initial position can be simplified when the two antennas and the four antennas are used. The method for the network side (base station) to notify the user equipment of the channel measurement pilot pattern is as follows: In the signaling, 4 bits are used to indicate the position index of the port 0; that is, the position of the antenna port 0 when the eight antenna configuration is notified can uniquely determine the current CSI-RS pattern used by the cell.

In the case of eight antennas, there are five CSI-RS patterns shown in Figure 1 (a), three CSI-RS patterns in Figure 1 (b), and four CSI-RS patterns in Figure 1 (c). There are seven CSI-RS patterns shown in Figure 1 (d). The UE knows the current frame structure type and the TDD/FDD multiplexing mode, and the CSI-RS pattern sets shown in FIG. 1(a) and FIG. 1(b) are different in the case of TDD, as shown in FIG. 1(c). The CSI-RS pattern is the same as the four patterns shown in Figure 1 (d), so the Normal CP frame structure can be used to distinguish the CSI-RS patterns by notifying the positions of the five CSI-RS pattern antenna ports 0 (notification) The position of the antenna port 0, the CSI-RS pattern is uniquely determined), and the extended CP frame structure can distinguish the CSI-RS pattern by signaling the positions of the seven CSI-RS pattern antenna ports 0.

In order to solve the problems existing in the prior art, in the embodiment of the present invention, signaling is used. The various configuration parameters mentioned in the embodiments of the invention can be flexibly selected according to actual conditions.

The nested pattern notification method proposed by the technical solution of the present invention can reduce the 5-bit overhead of the pattern notification to 4 bits.

The technical solution of the present invention can combine the number of antennas and the initial position notification of the pilot pattern to save overhead.

Embodiment 1

This embodiment is directed to Normal CP

As shown in FIG. 3, this embodiment mainly includes the following steps:

Step S310, using 2 bits (bit) in the signaling to indicate the number of ports;

Step S320, using 3 bits to indicate the position index of the CSI-RS port 0 (7 possibilities); Step S330, using 1 bit to indicate the pattern offset indication in the configuration of the two antenna or the four antenna port.

It should be noted that, this embodiment shows in steps how to implement the notification process of the pilot pattern. In fact, there is no temporal sequence and logical dependency between the foregoing three steps. The technical solution of the embodiment is described for convenience. Therefore, the above steps cannot be considered as any limitation of the other embodiments of the present invention and the technical implementation process of the technical solution of the present invention. Specifically, the pattern offset indication (1 bit) in the two-antenna or four-antenna port configuration indicates the indicator bit after the pattern is split.

For example, when the eight-antenna CSI-RS pattern is divided into two four-antenna CSI-RS patterns, the value of the pattern offset indication is 0: four antennas are used for normal CP CSI-RS in both TDD and FDD. The pattern of 0, 1, 2, 3 ports in the eight-antenna CSI-RS pattern (that is, the pattern of the 0, 1 , 2, and 3 ports in the eight-antenna CSI-RS pattern shown in Figure 1 (a)); The value 1 of the value of the offset indication refers to the pattern of the 5, 6, 7 and 8 ports in the eight-antenna CSI-RS pattern applicable to both the TDD and the FDD of the CSI-RS of the Normal CP. Figure 1 (a) shows the pattern of the 5, 6, 7 and 8 ports in the eight-antenna CSI-RS pattern.

For example, when the four-antenna CSI-RS pattern is divided into two two-antenna CSI-RS patterns, when the value of the pattern offset indication is 0, it indicates that the four antennas use the CSI-RS of the Normal CP for both TDD and FDD. The pattern of 0, 1, 2, 3 ports in the CSI-RS pattern of the antenna (ie, the pattern of the 0, 1 , 2, 3 ports in the eight-antenna CSI-RS pattern shown in Figure 1 (a)); When the value of the indication is 1, it indicates the pattern of ports 5, 6, 7 and 8 of the eight-antenna CSI-RS pattern applicable to both TDD and FDD of the four-antenna CSI-RS using Normal CP (ie, Figure 1 (a) The pattern shown is indexed for the 5, 6, 7 and 8 ports in the eight-antenna CSI-RS pattern).

In the case of two antennas, in combination with the indication of the number of CSI-RS antenna ports, a total of 6 bits are used, and the CSI-RS pattern can still be indicated. When the value of the pattern offset indication is 0, it indicates that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as the position of the antenna of the four antennas. When the value of the pattern offset indication is 1, it indicates that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is the position of the two antennas of the two antennas.

Embodiment 2

In the case of four antennas, 2 bits are used to indicate the number of ports in the signaling, and 4 bits are used to indicate the position index of the CSI-RS port 0 at the time of four antennas (CSI-RS port 0 has seven possibilities at eight antennas, and CSI at four antennas) -RS port 0 has 14 possibilities);

In the case of two antennas, the extra bits in the number of ports are combined and 4 bits are used to indicate the position index of CSI-RS port 0 at the time of two antennas (because there are 28 possibilities for CSI-RS port 0 at two antennas, it can be indicated by 4 bits) 14 possibilities, combined with extra bits in the port number to indicate another 14 possibilities). The 4 bits indicating the position index of the CSI-RS port 0 at the time of four antennas are used to represent the port index, and 0-10 respectively represent 10 positions of the port 0 at the four antenna ends. Up to 7 CSI-RS patterns are used for eight antennas and up to 14 CSI-RS patterns for four antennas, so it is sufficient to use 4 bits at four or eight antennas. In the case of two antennas, in combination with the indication of the number of CSI-RS antenna ports, a total of 6 bits are used, and the CSI-RS pattern can still be indicated. When the number of CSI-RS ports is 0, it indicates that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as four antennas, and the position of the antenna port is 0; - The number of RS ports is 0, indicating that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is the position of the two antennas of the four antennas.

Embodiment 3: A notification device for measuring inter-cell channel pilot patterns

The device is configured to use 2 bits to indicate the number of ports in the signaling, 3 bits to indicate the position index of the channel state information reference signal (CSI-RS) port 0, and 1 bit to indicate the configuration of the two antennas or the four antenna ports. Pattern offset indication; or

The device is configured to use 2 bits to indicate the number of ports in the signaling, and 4 bits to indicate the position index of the CSI-RS port 0 when the four antennas are used; or

The device is configured to use 2 bits to indicate the number of ports in the signaling, combine the number of extra bits in the port number, and use 4 bits to indicate the position index of the CSI-RS port 0 at the time of the two antennas.

The apparatus as described above, when the eight-antenna CSI-RS pattern is divided into two four-antenna CSI-RS patterns:

When the value of the pattern offset indication is 0, the four antennas use the normal cyclic prefix (Normal CP) CSI-RS for both the time division duplex (TDD) and the frequency division duplex (FDD). The pattern of 0, 1, 2, 3 ports in the RS pattern;

When the value of the pattern offset indication is 1, the four antennas use the patterns of the 5th, 6th, 7th, and 8th ports in the eight-antenna CSI-RS pattern applicable to the CSI-RS of the Normal CP in both TDD and FDD.

The apparatus as described above, when the four-antenna CSI-RS pattern is divided into two two-antenna CSI-RS patterns:

When the value of the pattern offset indication is 0, the four antennas use the normal cyclic prefix (Normal CP) CSI-RS for both the time division duplex (TDD) and the frequency division duplex (FDD). RS The pattern of 0, 1, 2, 3 ports in the drawing;

When the value of the pattern offset indication is 1, the four antennas use the CSI-RS of the Normal CP for the patterns of the 5, 6, 7 and 8 ports in the eight-antenna CSI-RS pattern applicable to both TDD and FDD.

The apparatus as described above is used to indicate the pattern offset indication in the two antenna port configuration with 1 bit:

When the value of the pattern offset indication is 0, the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as the position of the antenna of the four antennas.

The apparatus as described above is used to indicate the position index of the CSI-RS port 0 when four bits are used for four antennas:

The position index of the CSI-RS port 0 when representing the four antennas is used to characterize the port index.

The device as described above is used to combine the number of extra bits in the port number and use 4 bits to indicate the position index of the CSI-RS port 0 when two antennas are:

When the number of CSI-RS ports is 0, it indicates that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as the position of the antenna of the four antennas.

When the number of CSI-RS ports is 0, it means that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as the position of the antennas of the four antennas.

It should be understood by those skilled in the art that the above modules or steps can be implemented by a general computing device, which can be concentrated on a single computing device or distributed over a network of multiple computing devices, optionally They may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device, or they may be fabricated into individual integrated circuit modules, or multiple modules thereof or The steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

While the embodiments of the present invention have been described above, the described embodiments are merely for the purpose of understanding the invention and are not intended to limit the invention. Any modification and variation of the form and details of the invention may be made by those skilled in the art without departing from the spirit and scope of the invention. Still have to The scope defined by the appended claims shall prevail.

Industrial applicability

Compared with the prior art, the method and device for notifying the channel measurement pilot pattern provided by the foregoing technical solution realize the notification of the channel state information reference signal (CSI-RS) pattern, and reduce the signaling of the CSI-RS pattern notification. The overhead increases the flexibility of CSI-RS pattern selection, improves system performance, and improves the efficiency of pattern utilization as much as possible.

Claims

Claim

A method for notifying a pilot pattern of inter-cell channel measurement, comprising:

In the signaling, 2 bits are used to indicate the number of ports, and 4 bits are used to indicate the position index of CSI-RS port 0 at the time of four antennas; or

In the signaling, 2 bits are used to indicate the number of ports, and the number of extra bits in the number of ports is combined and 4 bits are used to indicate the position index of CSI-RS port 0 at the time of two antennas. 2. The method according to claim 1, wherein when the eight antenna CSI-RS pattern is divided into two four antenna CSI-RS patterns:

When the value of the pattern offset indication is 0, the four antennas use the CSI-RS of the normal cyclic prefix (CP) for the eight-antenna CSI-RS applicable to both time division duplex (TDD) and frequency division duplex (FDD). 0, 1 in the pattern

2, 3 port pattern;

3. The method according to claim 1, wherein when the four antenna CSI-RS pattern is divided into two two antenna CSI-RS patterns:

4. The method according to claim 1, wherein: the step of indicating the pattern offset indication in the configuration of the two antenna ports by using 1 bit:

When the value of the pattern offset indication is 0, it indicates that the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked by the position of the antenna of the four antennas.

The method according to claim 1, wherein the step of indicating the position index of the CSI-RS port 0 at the time of four antennas is 4 bits:

6. The method according to claim 1, wherein the step of combining the number of bits in the port number and using 4 bits to indicate the position index of the CSI-RS port 0 when the two antennas are:

When the number of CSI-RS ports is 0, it means that the CSI-RS is a two-antenna port, and the four-antenna CSI-RS pattern is split into two antennas. The position of the CSI-RS pattern is marked as the position of the antenna of the four antennas.

7. A notification device for a channel measurement pilot pattern between cells,

8. The apparatus according to claim 7, wherein, when the eight antenna CSI-RS pattern is divided into two four antenna CSI-RS patterns, the apparatus is set to:

Eight-antenna 八 Eight-antenna CSI-RS for normal CP CSI-RS for both TDD and FDD When the pattern of the 5, 6, 7 and 8 ports in the pattern is set, the value of the pattern offset indication is set to 1.

9. The apparatus according to claim 7, wherein when the four antenna CSI-RS pattern is divided into two two antenna CSI-RS patterns, the apparatus is set to:

10. Apparatus according to claim 7, wherein the apparatus is arranged to indicate a pattern offset indication in a two antenna port configuration using 1 bit in the following manner:

11. The apparatus according to claim 7, wherein the apparatus is configured to represent the port index by using the position index when the position index of the CSI-RS port 0 when the four antennas are four bits is used.

12. The apparatus according to claim 7, wherein the apparatus is arranged to combine the number of extra bits in the number of ports in the following manner and to use 4 bits to indicate the position index of the CSI-RS port 0 when the two antennas are: