WO2013056563A1

WO2013056563A1 - Method and terminal for reporting uplink transmit diversity ability

Info

Publication number: WO2013056563A1
Application number: PCT/CN2012/077374
Authority: WO
Inventors: 贺美芳; 史莉荣
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-10-20
Filing date: 2012-06-21
Publication date: 2013-04-25
Also published as: CN103067063B; CN103067063A

Abstract

Disclosed are a method and terminal for reporting uplink transmit diversity ability. The method includes: a terminal configuring the uplink transmit diversity ability thereof into an uplink air interface signalling; and the terminal reporting to the network side the uplink transmit diversity ability of the terminal through the uplink air interface signalling. The present invention realizes the reporting of the uplink opened-loop transmit diversity ability and/or uplink closed-loop transmit diversity ability.

Description

Method and terminal for reporting uplink transmit diversity capability

The present invention relates to the field of multi-antenna transmit diversity technology, and in particular, to a method and a terminal for uplink transmit diversity capability. Background technique

Multi-antenna technology enables higher system capacity, wider cell coverage, and better quality of service by using multiple antennas at the transmitter and/or receiver. Multiple antennas at the sender and receiver can be used to implement transmit or receive diversity, as well as for spatial multiplexing. The transmit diversity technique is an anti-fading technique in the field of wireless communication in which at least two signals containing the same information are transmitted at the transmitting end. These signals carrying the same information are derived from at least two mutually independent sources. The transmit diversity technique can be divided into three basic types: space, frequency, and time, depending on the structure and statistical characteristics of the transmitted signal samples and the wireless resources it occupies. It can also be a combination of these three types. The so-called spatial diversity refers to the use of different locations (spaces) of different transmission locations, and the signal is irrelevant in statistical characteristics when it reaches the receiving end after the channel is experienced, and the anti-fading function is realized. The so-called frequency diversity refers to the function of realizing anti-fading (frequency selectivity) by using the statistically uncorrelated characteristics of the signals in different frequency bands after fading channels, that is, the difference in statistical characteristics of fading in different frequency bands. In implementation, the information to be transmitted may be separately modulated on a frequency-independent carrier for transmission. The so-called time diversity means that when a random fading signal is used, when the time interval of the sampling points is sufficiently large (greater than the coherence time of the transmission channel), the fading between the samples is statistically uncorrelated, that is, the statistical characteristics of the temporal fading are utilized. The difference is made to achieve resistance to time selective fading.

The transmit diversity technology is classified into an open loop transmit diversity mode and a closed loop transmit diversity module according to whether the receiving end needs to feed back the diversity of the feedback to the sender. In open loop transmit diversity mode, the receiving end does not Any additional transmission-related information is fed back to the sender, and the sender can use its own coding technique (such as simple space-time coding) to complete the transmit diversity. In the closed-loop transmit diversity mode, the receiver needs to use feedback channel feedback to the transmitter for a parameter related to transmit diversity (such as the precoding vector required for transmit diversity, indicated by precoding indication information), and the sender uses the feedback after receiving. The information completes the send diversity.

In 3GPP Release 10, the uplink open-loop transmit diversity of the high-speed uplink packet access (HSUPA, High Speed Uplink Packet Access) system has completed the development of standards (TR25.863), and is currently discussing the relevance of closed-loop transmit diversity. Content, introduces a precoding control indication (PCI, Precoding Control Indication). At present, the industry has reached a consensus on the channel structure of the uplink closed-loop transmit diversity. As shown in FIG. 1, an uplink channel, that is, a secondary-dedicated physical control channel (S-DPCCH), is added, and the pilot frequency value is uploaded to the network side. The network side uses the received pilot frequency value and the pilot value in the Dedicated Physical Control Channel (DPCCH) to understand the weakening of the channel path. A new downlink channel is added, similar to the fractional dedicated physical channel (F -DPCH), that is, a fractional precoding indication channel (F-PCICH), for transmitting a precoding value of the uplink transmit diversity to the terminal to achieve a better prevention of path weakening. Currently, for the F-DPCH, three time slots are transmitted. For the compressed mode transmission, the terminal saves the last received PCI before the interval, and receives a new precoding after the compressed mode transmission interval.

Uplink open-loop transmit diversity is suitable for scenarios where the mobile terminal rate is low. It is not suitable for scenarios with high mobile speed. Because it is easy to cause Doppler effect, the industry has reached the following consensus: The terminal reports open-loop transmit diversity capability. To the network side, dedicated signaling is introduced by the network side to configure open loop transmission diversity. Currently, the industry standard that supports open-loop transmit diversity can be lower than 3GPP Release 11. However, the specific solution of the uplink and the open loop transmission diversity capability and/or the uplink closed loop transmission diversity capability of the terminal is reported to the network side. The prior art does not provide a corresponding solution. Summary of the invention

In view of the above, the main purpose of the present invention is to provide a method and a terminal for reporting the uplink transmit diversity capability, so as to implement the uplink open loop transmit diversity capability and/or the uplink closed loop transmit diversity capability of the terminal.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The method for reporting the uplink transmit diversity capability provided by the present invention includes:

The terminal configures its uplink transmit diversity capability in the uplink air interface signaling.

The terminal reports the uplink transmit diversity capability of the terminal to the network side by using the uplink air interface signaling.

Preferably, the method further includes: adding an uplink open loop transmit diversity capability support (OLTD supported) cell and an uplink closed loop transmit diversity capability support (CLTD supported) cell to the terminal in the radio access capability cell. Configure its own uplink transmit diversity capability;

The enumeration value of the OLTD supported cell is true or false, and the enumeration value of the CLTD supported cell is true or H.

Preferably, the method further includes: adding an uplink transmit diversity support (Support of UL Diversity) cell to the terminal to configure its own uplink transmit diversity capability;

For terminals prior to 3GPP Release 11, the Enumeration of Support of UL Diversity cells is Open Loop Transmit Diversity (OLTD) or idle value (spare); For 3GPP Release 11 versions of the terminal, Support of UL Diversity The enumeration value of the cell is OLTD, or it is open loop transmit diversity and closed loop transmit diversity ( OLTD and CLTD ).

Preferably, after the terminal reports the uplink transmit diversity capability of the terminal to the network side by using the uplink air interface signaling, the method further includes:

The network side decodes the uplink air interface signaling to learn the uplink transmit diversity capability of the terminal, and configures the phase to the terminal by using downlink air interface signaling according to the current service requirement and the wireless link status. Should be in the uplink transmit diversity mode.

Preferably, the method further includes:

If the network side knows that the uplink transmit diversity capability of the terminal is to support uplink open loop transmission diversity, configure an uplink open loop transmit diversity mode to the terminal;

If the network side knows that the uplink transmit diversity capability of the terminal is to support uplink open loop transmit diversity and uplink closed loop transmit diversity, the uplink closed loop transmit diversity mode is configured to the terminal.

The present invention further provides a terminal for reporting the uplink transmit diversity capability, where the terminal includes: a capability configuration module and a report module, where

The capability configuration module is configured to configure an uplink transmit diversity capability of the terminal in uplink air interface signaling;

The reporting module is configured to report the uplink transmit diversity capability of the terminal to the network side by using the uplink air interface signaling.

Preferably, the capability configuration module is further configured to: use an uplink open loop transmit diversity capability support (OLTD supported) cell and an uplink closed loop transmit diversity capability support (CLTD supported) cell added by the wireless access capability cell. The uplink transmit diversity capability of the terminal is configured; the enumeration value of the OLTD supported cell is true or false, and the enumeration value of the CLTD supported cell is true or false.

Preferably, the capability configuration module is further configured to configure an uplink transmit diversity capability of the terminal by using an uplink uplink transmit diversity support (Support of UL Diversity) cell in the radio access capability cell;

For a terminal of a version prior to 3GPP Release 11, the enumeration value of the Support of UL Diversity cells is an open loop transmit diversity (OLTD) or an idle value (spare); for a terminal of the 3GPP Release 11 version, the support of The enumeration value of the UL Diversity cell is OLTD, or is open-loop transmit diversity and closed-loop transmit diversity (OLTD and CLTD).

Preferably, the network side decodes the uplink air interface signaling to learn the uplink transmit diversity of the terminal. The capability, and configuring the corresponding uplink transmit diversity mode to the terminal through downlink air interface signaling according to current service requirements and wireless link conditions.

Preferably, if the network side knows that the uplink transmit diversity capability of the terminal is to support uplink open loop transmit diversity, the uplink open loop transmit diversity mode is configured to the terminal;

The method and the terminal for reporting the uplink transmit diversity capability provided by the present invention, the terminal configures its uplink transmit diversity capability in the uplink air interface signaling, and reports the uplink of the terminal to the network side through the uplink air interface signaling. Send diversity capabilities. Through the invention, the uplink open loop transmission diversity capability and/or the uplink closed loop transmission diversity capability of the terminal are reported, which better embodies the function supplement of the uplink closed loop transmit diversity to the uplink open loop transmit diversity. DRAWINGS

1 is a schematic diagram of a channel structure of uplink closed loop transmit diversity in the prior art;

2 is a flowchart of a method for reporting uplink transmit diversity capability according to an embodiment of the present invention; FIG. 3 is a flowchart of a method for uplink transmit diversity capability reporting and network side configuration according to Embodiment 1 of the present invention;

4 is a flowchart of a method for reporting uplink uplink diversity capability and network side configuration according to Embodiment 2 of the present invention;

5 is a flowchart of a method for reporting uplink transmit diversity capability and network side configuration according to Embodiment 3 of the present invention;

FIG. 6 is a flowchart of a method for reporting uplink transmit diversity capability and network side configuration according to Embodiment 4 of the present invention. detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments. The method for reporting the uplink transmit diversity capability provided by the embodiment of the present invention, as shown in FIG. 2, mainly includes the following steps:

Step 201: The terminal configures its own uplink transmit diversity capability in the uplink air interface signaling. As an implementation manner of the present invention, two cells, that is, an uplink open loop transmit diversity capability support (OLTD supported) cell and an uplink closed loop transmit diversity capability support (CLTD supported), may be added to the radio access capability cell. Element, used for the terminal to configure its own uplink transmit diversity capability. The added cells are shown in the following table:

Table 1

The enumeration value of the OLTD supported cell is true or false, and the enumeration value of the CLTD supported cell is true or false. The enumeration value of the OLTD supported cell is true, indicating that the terminal supports uplink open-loop transmit diversity. The enumeration value of the OLTD supported cell is ^ indicating that the terminal does not support uplink open-loop transmit diversity; the enumeration value of the CLTD supported cell is true. , indicating that the terminal supports uplink closed-loop transmit diversity, and the enumeration value of the CLTD supported cell is false, indicating that the terminal does not support uplink closed-loop transmit diversity.

In addition, since the current version of the terminal that supports open-loop transmit diversity can be lower than that of 3GPP Release 11, the terminal that supports uplink closed-loop transmit diversity supports uplink open-loop transmit diversity by default.

As another implementation manner of the present invention, one additional radio access capability cell may be added. The cell, that is, the uplink of the transmit diversity support (Support of UL Diversity), is used by the terminal to configure its own uplink transmit diversity capability. The added cells are as follows:

Table 2

table 3

For the terminal of the previous version of the 3GPP Release 11, the enumeration value of the Support of UL Diversity cells is open-loop transmit diversity (OLTD) or idle value (spare), and the enumeration value is OLTD indicating that the terminal supports uplink open loop. Send diversity, the enumeration value is spare, the terminal does not support uplink open-loop transmit diversity; for the 3GPP Release 11 version, the supported value of the Support of UL Diversity cells is OLTD, or open-loop transmit diversity and closed-loop transmit diversity. (OLTD and CLTD), the enumeration value is OLTD, indicating that the terminal supports uplink open-loop transmission diversity, and the enumeration value is OLTD and CLTD, indicating that the terminal supports uplink open-loop transmission diversity and uplink closed-loop transmission. In addition, the current industry regulations support open-loop transmission. The terminal version of the diversity can be lower than 3GPP Release 11. Therefore, for terminals that support uplink closed-loop transmit diversity, it also supports uplink open-loop transmit diversity by default.

Step 202: The terminal reports the uplink transmit diversity capability of the terminal to the network side by using the uplink air interface signaling. Then, the network side decodes the radio access capability cell to learn the uplink transmit diversity capability of the terminal, and configures the corresponding uplink transmit diversity mode to the terminal by using the downlink air interface signaling according to the current service requirement and the radio link status, specifically:

If the network side knows that the uplink transmit diversity capability of the terminal is to support the uplink and open loop transmission diversity, the uplink open loop transmission diversity mode is configured to the terminal.

The method for reporting the uplink transmit diversity capability described above is further described in detail below in conjunction with the specific embodiments.

The method for reporting the uplink transmit diversity capability of the first embodiment of the present invention is as shown in FIG. 3. In this embodiment, the terminal reports to the network side that it supports uplink open loop transmit diversity. The method mainly includes the following steps:

Step 301, the terminal reports the uplink air interface by signaling to the network that supports an uplink open-loop transmission diversity, OLTD supported cell provided in the uplink air interface signaling enumeration is true (TRUE) ₀

Taking the UMTS (UMTS Terrestrial Radio Access Network) as an example, the terminal sends uplink air interface signaling to its network side radio network controller (RNC, Radio Network). The controller reports that the terminal supports uplink open loop transmission diversity, and the terminal sets the enumeration value of the cell OLTD supported in the uplink air interface signaling to be TRUE.

The uplink air interface signaling may be a radio resource connection setup request message, a cell update message, or the like. It should be noted that the uplink air interface signaling of the present invention is not limited to the above, and those skilled in the art should understand that any uplink air interface signaling in practical applications should be applicable to the embodiments of the present invention, and can be used for setting letters. Meta OLTD supported.

Step 302: After receiving the uplink air interface signaling, the network side decodes and obtains the cell OLTD. The supported enumeration value is TRUE, and the uplink open loop transmission diversity mode is configured to the terminal through downlink air interface signaling according to the current service requirement and the wireless link status.

The configuration of the uplink and open loop transmission diversity mode to the terminal includes: filling in the uplink transmission diversity mode into the open loop transmission diversity mode, that is, OLTD.

In addition, the downlink air interface signaling may be a physical channel reconfiguration message, a cell update confirmation message, or the like. It should be noted that the downlink air interface signaling of the present invention is not limited to the above, and those skilled in the art should understand that any downlink air interface signaling in practical applications should be applicable to the embodiments of the present invention, and can be used on the network side. Configure the uplink open loop transmit diversity mode to the terminal.

The method for reporting the uplink transmit diversity capability of the second embodiment of the present invention is as shown in FIG. 4. In this embodiment, the terminal reports to the network side that it supports uplink open loop transmit diversity and uplink closed loop transmit diversity, and the method mainly includes the following steps:

Step 401: The terminal reports to the network side that the uplink open loop transmit diversity and the uplink closed loop transmit diversity are supported by the uplink air interface signaling, and the enumeration value of the cell OLTD supported is set to TRUE in the uplink air interface signaling, and the cell CLTD is set. The supported enumeration value is also TRUE.

Taking the UTRAN as an example, the terminal reports the uplink open loop transmit diversity and the uplink closed loop transmit diversity to the RNC of the network side through the uplink air interface signaling, and the terminal sets the enumeration value of the cell OLTD supported in the uplink air interface signaling. For TRUE, the enumeration value of the set cell CLTD supported is also TRUE.

The uplink air interface signaling may be a radio resource connection setup request message, a cell update message, or the like. It should be noted that the uplink air interface signaling of the present invention is not limited to the above, and those skilled in the art should understand that any uplink air interface signaling in practical applications should be applicable to the embodiments of the present invention, and can be used for setting letters. Meta-OLTD supported and CLTD supported.

Step 402: After receiving the uplink air interface signaling, the network side obtains the enumeration value of the cell OLTD supported as TRUE, and the cell CLTD supported is also TRUE, thereby passing the current service requirement and the wireless link status. Downlink air interface signaling to the terminal configuration Line closed loop transmit diversity mode.

The configuration of the uplink closed-loop transmit diversity mode to the terminal includes: filling the uplink transmit diversity mode into the closed-loop transmit diversity mode, that is, CLTD. In addition, the network side also configures uplink closed-loop transmit diversity related parameters to the terminal, such as: primary, pilot frequency power offset, and so on.

In addition, the downlink air interface signaling may be a physical channel reconfiguration message, a cell update confirmation message, or the like. It should be noted that the downlink air interface signaling of the present invention is not limited to the above, and those skilled in the art should understand that any downlink air interface signaling in practical applications should be applicable to the embodiments of the present invention, and can be used on the network side. Configure the uplink closed loop transmit diversity mode to the terminal.

The method for reporting the uplink transmit diversity capability of the third embodiment of the present invention is as shown in FIG. 5. In this embodiment, the terminal of the 3GPP Rdease 9 reports to the network side that it supports uplink open loop transmit diversity, and the method mainly includes the following steps:

Step 501: The terminal of the 3GPP Release 9 reports to the network side that the uplink open loop transmission diversity is supported by the uplink air interface signaling, and the enumeration value of the support of UL Diversity is set to OLTD in the uplink air interface signaling.

Taking UTRAN as an example, the terminal of 3GPP Release 9 reports the uplink open loop transmission diversity of the terminal to the RNC of the network side through the uplink air interface signaling, and the terminal sets the enumeration of the support of UL Diversity in the uplink air interface signaling. The value is OLTD.

The uplink air interface signaling may be a radio resource connection setup request message, a cell update message, or the like. It should be noted that the uplink air interface signaling of the present invention is not limited to the above, and those skilled in the art should understand that any uplink air interface signaling in practical applications should be applicable to the embodiments of the present invention, and can be used for setting letters. Yuan Support of UL Diversity.

Step 502: After receiving the uplink air interface signaling, the network side decodes the obtained support of the UL Diversity into an OLTD, and configures the uplink to be opened by the downlink air interface signaling according to the current service requirement and the wireless link status. Ring sends diversity mode.

The configuration of the uplink and open loop transmission diversity mode to the terminal specifically includes: Fill in the uplink transmit diversity mode to open loop transmit diversity mode, that is, OLTD.

The method for reporting the uplink transmit diversity capability of the fourth embodiment of the present invention is as shown in FIG. 6. In this embodiment, the terminal reports to the network side that it supports uplink open loop transmit diversity and uplink closed loop transmit diversity. The method mainly includes the following steps:

Step 601: The terminal reports to the network side that the uplink open loop transmission diversity and the uplink closed loop transmission diversity are supported by the uplink air interface signaling, and the enumeration values of the support of UL Diversity are set to OLTD and CLTD in the uplink air interface signaling.

Taking the UTRAN as an example, the terminal reports the uplink open loop transmit diversity and the uplink closed loop transmit diversity of the terminal to the RNC on the network side through the uplink air interface signaling, and the terminal sets the support of the UL Diversity in the uplink air interface signaling. The values are OLTD and CLTD.

Step 602: After receiving the uplink air interface signaling, the network side obtains the enumerated values of the supported units of the UL Diversity as the OLTD and the CLTD, so that the downlink air interface signaling is used to the terminal according to the current service demand and the wireless link status. Configure the uplink closed loop transmit diversity mode.

In addition, the downlink air interface signaling may be a physical channel reconfiguration message, a cell update confirmation message, or the like. Wait. It should be noted that the downlink air interface signaling of the present invention is not limited to the above, and those skilled in the art should understand that any downlink air interface signaling in practical applications should be applicable to the embodiments of the present invention, and can be used on the network side. Configure the uplink closed loop transmit diversity mode to the terminal.

For the method for reporting the uplink transmit diversity capability, the embodiment of the present invention further provides a terminal for reporting the uplink transmit diversity capability, including: a capability configuration module and a report module. The capability configuration module is configured to configure the uplink transmit diversity capability of the terminal in the uplink air interface signaling, and the reporting module is configured to report, by using the uplink air interface signaling, the uplink transmit diversity capability of the terminal to the network side.

Preferably, the capability configuration module is further configured to configure an uplink transmit diversity capability of the terminal by using an OLTD supported cell and a CLTD supported cell added in the radio access capability cell;

Preferably, the capability configuration module is further configured to configure an uplink transmit diversity capability of the terminal by using a Support of UL Diversity cell added in the radio access capability cell;

For a terminal of the version prior to 3GPP Release 11, the enumeration value of the Support of UL Diversity cells is OLTD, or is spare; for the terminal of the 3GPP Release 11 version, the enumeration value of the Support of UL Diversity cells is OLTD. Or for OLTD and CLTD.

The above is only the preferred embodiment of the present invention and is not intended to limit the scope of the present invention.

Claims

A method for reporting uplink transmit diversity capability, the method comprising:

The method for reporting the uplink transmit diversity capability according to claim 1, wherein the method further comprises: adding an uplink open loop transmit diversity capability to the OLTD supported cell and the uplink closed loop transmit diversity capability in the wireless access capability cell. a CLTD supported cell, configured to configure, by the terminal, an uplink transmit diversity capability of the terminal;

The enumeration value of the OLTD supported cell is true or false, and the enumeration value of the CLTD supported cell is true or false.

The method for reporting the uplink transmit diversity capability according to claim 1, wherein the method further comprises: adding an uplink transmit diversity support Support of UL Diversity cell to the radio access capability cell, where the terminal configures itself Uplink transmit diversity capability;

For terminals prior to 3GPP Release 11, the Enumeration of the Support of UL Diversity cells is the open-loop transmit diversity OLTD or the idle value spare; for the 3GPP Release 11 version of the terminal, the Support of UL Diversity cells The value is OLTD, or open-loop transmit diversity and closed-loop transmit diversity OLTD and CLTD.

The method for reporting the uplink transmit diversity capability according to claim 1, 2 or 3, wherein after the terminal reports the uplink transmit diversity capability of the terminal to the network side by using the uplink air interface signaling, the method further includes:

The network side decodes the uplink air interface signaling to learn the uplink transmit diversity capability of the terminal, and configures a corresponding uplink transmit diversity mode to the terminal by using downlink air interface signaling according to the current service requirement and the radio link status.

5. The method for reporting uplink transmit diversity capability according to claim 4, wherein the party The law also includes:

A terminal that reports the uplink transmit diversity capability, where the terminal includes: a capability configuration module and a reporting module, where

The terminal for reporting the uplink transmit diversity capability according to claim 6, wherein the capability configuration module is configured to support the OLTD supported cell and the uplink closed loop by using an uplink open loop transmit diversity capability added in the radio access capability cell. The transmit diversity capability supports the CLTD supported cell, and configures the uplink transmit diversity capability of the terminal;

The terminal for reporting the uplink transmit diversity capability according to claim 6, wherein the capability configuration module is configured to support the Support of UL Diversity cells by adding uplink transmit diversity in the radio access capability cell, and configuring the The uplink transmit diversity capability of the terminal; for the terminal of the version prior to 3GPP Release 11, the enumeration value of the Support of UL Diversity cells is an open loop transmit diversity OLTD, or an idle value spare; for a 3GPP Release 11 version of the terminal, The enumeration value of the Support of UL Diversity cells is OLTD, or is open-loop transmit diversity and closed-loop transmit diversity OLTD and CLTD.

9. The terminal for reporting uplink transmit diversity capability according to claim 6, 7 or 8, wherein The network side decodes the uplink air interface signaling to learn the uplink transmit diversity capability of the terminal, and configures a corresponding uplink transmit diversity mode to the terminal by using downlink air interface signaling according to the current service requirement and the radio link status.

The terminal that reports the uplink transmit diversity capability according to claim 9, wherein if the network side knows that the uplink transmit diversity capability of the terminal is to support uplink open loop transmit diversity, the uplink open loop transmit diversity mode is configured to the terminal. ;