WO2011120429A1 - Indication method and apparatus for orthogonal cover code configuration and frequency hopping configuration - Google Patents

Abstract

An indication method and apparatus for Orthogonal Cover Code configuration and frequency hopping configuration are provided in the present invention, said method comprises: a base station indicates Orthogonal Cover Code configuration or frequency hopping configuration to a terminal by signaling, wherein, one of the Orthogonal Cover Code configuration and the frequency hopping configuration is bound with the other by a predefined mapping relation (S202); based on the received Orthogonal Cover Code configuration or frequency hopping configuration, the terminal performs Orthogonal Cover Code weighting process and determines whether to perform group frequency hopping or sequence frequency hopping (S204). By the combined indication method and apparatus for Orthogonal Cover Code (OCC) configuration and frequency hopping configuration in the present invention, the frequency hopping configuration can be indicated together with the indication for OCC configuration, thus improving the flexibility of OCC utilization and reducing signaling overhead by the binding relation between OCC configuration and frequency hopping configuration.

Description

 Orthogonal cover code configuration and frequency hopping configuration indication method and device

Technical field

 The present invention relates to the field of communications, and in particular, to an orthogonal cover code configuration and a frequency hopping configuration indication method and apparatus. Background technique

 In the LTE-A, uplink multi-antenna transmission is introduced, and the terminal can use multiple RF channels to transmit data to achieve higher spectral efficiency. To ensure the performance of single-user multi-layer transmission and multi-user transmission, and to reduce inter-layer and inter-user interference, OCC (Orthogonal Cover Code) can be introduced to ensure orthogonality between layers or users. However, OCC can only be used in non-time slot frequency hopping systems. If the cell enables group hopping or sequence hopping, occ cannot be used. In order to enable users in such cells to use OCC, group hopping and sequence hopping of each user can be independently configured by signaling of PDCCH, thereby fully utilizing OCC to ensure orthogonality.

 MIMO (Multiple Input Multiple Output) technology uses multiple antennas for transmitting and receiving at both the transmitting end and the receiving end, which greatly improves the transmission performance and capacity of the system. In uplink transmission, MIMO transmission can be implemented in two ways: SU-MIMO (single-user multiple-input multiple-output) and MU-MIMO (multi-user multiple-input multiple-output). SU-MIMO uses spatial multiplexing to transmit multiple data streams of a certain user on the same time-frequency resource; MU-MIMO uses multiple orthogonality between users to send multiple users on the same time-frequency resource. data. Without increasing bandwidth, MIMO technology can multiply the capacity and spectral efficiency of communication systems.

 In the SU-MIMO transmission, multiple data streams occupy the same time-frequency resource, and the uplink channel corresponding to each data stream (one data port corresponding to one uplink port) needs to be obtained through the DMRS, so that the data of each stream can be detected separately. The DMRSs of different ports occupy the same time-frequency resource, and the orthogonality of the DMRS sequences ensures that the receiving end can separately estimate the channel of each port. In the uplink MU-MIMO transmission, the DMRSs of multiple users occupy the same resources, and the orthogonality of the DMRS sequences is used to ensure that the receiving end can detect each user's respective channel.

For SU-MIMO transmission, if the uplink transmission bandwidth is narrow, the DMRS sequence is very short, this If the number of transmitted data streams is large, the orthogonality between the DMRS sequences is difficult to guarantee. Similarly, in MU-MIMO transmission, if the multiplexed user transmission bandwidth is different, the length of the DMRS sequence is also different, and the orthogonality of the DMRS sequence cannot be guaranteed. At this time, an OCC sequence can be introduced, and two columns of DMRS sequences of different ports are multiplied by different OCC weights to ensure orthogonality of DMRS sequences of different ports, as shown in FIG. 1 .

 Since the UE does not know the transmission mode in which the UE is located, the weighting value configuration of the OCC can only be indicated to the UE by the base station through signaling. In SU-MIMO mode, part of the DMRS port of the user is weighted by OCC of [1 1] (ie, no OCC weighting is performed), and another part of the DMRS port is weighted by OCC of [1 -1], then the two ports can be It is possible to use OCC to maintain orthogonality. If the user and other users multiplex the MU-MIMO transmission, the two users can use the MU-MIMO respectively.

[1 1] and [1 -1] weight each DMRS port to use OCC to guarantee the orthogonality of DMRS between users, even if the bandwidth configured by two users is different. At the same time, the base station can also disable the user's OCC weighting as needed. Therefore, as long as the OCC weighting value of each DMRS port of each user is properly configured, the orthogonality between DMRS ports of different users or DMRS ports of different users can be maintained, regardless of whether the user is SU-MIMO mode or MU-MIMO mode. . There are currently several ways to indicate the configuration of the OCC:

 1) Bind the OCC configuration to the CS (Cycle Shift) indication of the DMRS without additional instructions;

 2) Bind the OCC configuration with the RI ( Rank Indicator) and CS indications, and no additional instructions are required;

 3) Explicitly indicate the OCC weights of the first two ports with 1 bit (two possible weights), and the last two ports are predefined;

 At the same time, the current group hopping and sequence hopping are cell configuration parameters, and each user cannot be configured separately. Therefore, the cell that enables such frequency hopping cannot use OCC.

 The above OCC configuration indication method has the following disadvantages:

 1) The supported scenarios are limited, and it is difficult to support high-order MU-MIMO, and scheduling is limited;

 2) Some programs have higher complexity;

 3) It is difficult for the user to determine whether the OCC function is enabled by means of an indication;

At the same time, there is currently no solution to support user independent group hopping and sequence hopping configuration. Summary of the invention

 In view of one or more problems existing in the related art, an object of the present invention is to provide an orthogonal cover code configuration and a frequency hopping configuration indication method and apparatus, to solve at least the above problems, and to achieve the above object, according to the present invention. An aspect of the present invention provides an orthogonal coverage code configuration and a frequency hopping configuration indication method, including: the base station indicates, by signaling, an orthogonal coverage code configuration or a frequency hopping configuration, where the orthogonal coverage code configuration and the location Another configuration in the frequency hopping configuration is bound to it and has a predetermined mapping relationship.

 According to an aspect of the present invention, an orthogonal cover code configuration and a frequency hopping configuration indication apparatus are provided, including: a signaling setting unit, configured to set an orthogonal cover code configuration or a frequency hopping configuration to signaling sent to a terminal And the another configuration of the orthogonal coverage code configuration and the frequency hopping configuration is bound to have a predetermined mapping relationship; and the signaling sending unit is configured to send the set signaling to the terminal.

 According to an aspect of the present invention, a terminal is provided, including: a signaling receiving unit, configured to receive signaling configured with an orthogonal cover code configuration or a frequency hopping configuration, where the orthogonal cover code configuration and the Another configuration in the frequency hopping configuration is bound to the predetermined configuration. The processing unit is configured to determine, according to the orthogonal coverage code configuration or the frequency hopping configuration in the received signaling, how to perform orthogonal cover code weighting. And decide whether to perform group hopping or sequence hopping.

 The joint indication method and apparatus for the OCC configuration and the frequency hopping configuration of the present invention can indicate the configuration of the frequency hopping while indicating the OCC configuration, improve the flexibility of the OCC utilization, and reduce the signaling overhead by the binding relationship configured by the two. . DRAWINGS

 1 is a schematic diagram of introducing orthogonal cover codes for weighting to ensure orthogonality of DMRSs of different ports;

 2 is a flowchart of an orthogonal cover code configuration and a frequency hopping configuration indication method according to an embodiment of the present invention;

3 is an orthogonal cover code configuration and frequency hopping configuration indicating device according to an embodiment of the present invention. Schematic;

 4 is a schematic diagram of a terminal in accordance with an embodiment of the present invention. detailed description

 The present invention provides a joint indication method and apparatus for OCC configuration and frequency hopping configuration, which uses DCI (downlink control channel signaling) domain or higher layer signaling of a downlink control channel (PDCCH) to indicate uplink OCC configuration or frequency hopping configuration. The two configurations are bound by a mapping relationship.

 2 is a flow chart of an orthogonal cover code configuration and a frequency hopping configuration indication method in accordance with an embodiment of the present invention. As shown in FIG. 2, an orthogonal cover code configuration and a frequency hopping configuration indication method according to an embodiment of the present invention include:

 S202. The base station indicates, by using the signaling, the orthogonal coverage code configuration or the frequency hopping configuration, where the orthogonal coverage code configuration and the other configuration of the frequency hopping configuration are bound to each other, and have a predetermined mapping relationship.

 S204. The terminal performs orthogonal cover code weighting according to the received orthogonal cover code configuration or a frequency hopping configuration and a predetermined mapping relationship, and determines whether to perform group hopping or sequence hopping.

 The base station indicates the orthogonal cover code configuration or the frequency hopping configuration to the terminal through the downlink control of the downlink control channel; the QoS or the radio resource control signaling of the terminal.

 The base station indicates the orthogonal cover code configuration using 2-bit signaling in the downlink control message. In this case, the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:

 Mapping relationship 1. All demodulation reference signal ports are weighted by the orthogonal cover code orthogonal cover code of [1, 1], and group hopping or sequence hopping is not enabled;

 Mapping relationship 2, part of the demodulation reference signal port uses the orthogonal cover code weighting code of [1, 1], and other demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], the group is not enabled. Frequency hopping or sequence hopping;

 Mapping relationship three, all demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], and group hopping or sequence hopping is not enabled;

 The mapping relationship is four, the orthogonal cover code function is not enabled, and the group hopping and sequence hopping are used for cell configuration.

The base station uses the 1-bit signaling in the downlink control message to indicate orthogonal cover code configuration or frequency hopping Set. In this case, the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is as follows: mapping relationship 1, the group hopping or sequence hopping is not enabled, the orthogonal cover code function is enabled; the mapping relationship 2, the group hopping The frequency and sequence hopping are used in the cell configuration, and the orthogonal cover code function is not enabled.

 The base station indicates the orthogonal cover code configuration or the frequency hopping configuration by using 1-bit high layer signaling in the radio resource control signaling. In this case, the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:

 Mapping relationship 1: The group hopping or sequence hopping is not enabled, and the orthogonal cover code function is enabled. The mapping relationship 2, group hopping and sequence hopping use the cell configuration, and the orthogonal cover code function is not enabled.

 3 is a schematic diagram of an orthogonal cover code configuration and frequency hopping configuration indicating apparatus according to an embodiment of the present invention. As shown in FIG. 3, the orthogonal cover code configuration and frequency hopping configuration indicating apparatus 300 according to an embodiment of the present invention includes:

 The signaling setting unit 302 is configured to set an orthogonal cover code configuration or a frequency hopping configuration to the signaling sent to the terminal, where the orthogonal cover code configuration and another configuration of the frequency hopping configuration are Binding therewith, having a predetermined mapping relationship; and signaling unit 304 for transmitting the set signaling to the terminal.

 The signaling setting unit sets an orthogonal cover code configuration or a frequency hopping configuration in a downlink control message or a radio resource control signaling of the downlink control channel.

 The signaling setting unit sets 2 bits in the downlink control message to indicate the orthogonal cover code configuration. In this case, the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:

 Mapping relationship 1. All demodulation reference signal demodulation reference signal ports use the orthogonal cover code orthogonal cover code weighting code of [1, 1], and group hopping or sequence hopping is not enabled;

 Mapping relationship 2, part of the demodulation reference signal port uses the orthogonal cover code weighting code of [1, 1], and other demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], the group is not enabled. Frequency hopping or sequence hopping;

 Mapping relationship three, all demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], and group hopping or sequence hopping is not enabled;

Mapping relationship four, does not enable orthogonal cover code function, group frequency hopping and sequence frequency hopping Set.

 The signaling setting unit sets 1 bit in the downlink control message to indicate the orthogonal cover code configuration or the frequency hopping configuration. In this case, the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:

 Mapping relationship 1, the group hopping or sequence hopping is not enabled, and the orthogonal cover code is enabled;

 Mapping relationship 2, group hopping and sequence hopping use cell configuration, orthogonal coverage code is not enabled. The signaling setting unit sets 1-bit high-level signaling in the radio resource control signaling for indicating an orthogonal cover code configuration or a frequency hopping configuration. In this case, the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:

 Mapping relationship 1, the group hopping or sequence hopping is not enabled, and the orthogonal cover code function is enabled; the mapping relationship 2, the group hopping and the sequence hopping are used in the cell configuration, and the orthogonal cover code function is not enabled.

•6 fi匕

 .

 4 is a schematic diagram of a terminal in accordance with an embodiment of the present invention. As shown in FIG. 4, the terminal 400 according to an embodiment of the present invention includes:

 The signaling receiving unit 402 is configured to receive signaling configured with an orthogonal cover code configuration or a frequency hopping configuration, where the orthogonal cover code configuration and another configuration of the frequency hopping configuration are bound thereto, and Predetermined mapping relationship;

 The processing unit 404 is configured to determine how to perform orthogonal cover code weighting according to the orthogonal cover code configuration or the frequency hopping configuration and the predetermined mapping relationship in the received signaling, and determine whether to perform group hopping or sequence hopping.

 The predetermined mapping relationship may be the relationship listed in the embodiment of the present invention, or may be other predetermined mapping relationships, as long as the binding of the two configurations can be implemented.

 The invention is described in more detail below by way of specific examples.

 The base station can indicate the OCC and the frequency hopping configuration of the terminal by adding a number of bits in the DCI domain of the downlink control channel PDCCH of each terminal, including the following two indication schemes. Wherein, the indication bits are all UE-specific, that is, valid only for the terminal that receives the indication bit.

Solution 1: Use 2-bit signaling to indicate the configuration of the OCC, and bind the frequency hopping configuration to it at the same time; Indication bit occ configuration corresponding if mega frequency configuration

 00 All DMRS ports use the OCC weighting of [1 1]. The group hopping or sequence hopping code is not enabled.

 01 Part of the DMRS port uses the OCC weighting of [1 1]. The group hopping or sequence hopping code is not enabled.

 Other DMRS ports use the [1 -1] OCC weight code

 10 All DMRS ports use [1 -1] OCC weighting. Group hopping or sequence hopping code is not enabled.

 Disable OCC function group hopping and sequence hopping community

1 1

 Configuration

 The "part" includes but is not limited to one of the "odd part", "even part", "first half" and "second half".

 For example, the base station can use the above method to indicate the configuration of the OCC by using 2-bit signaling, and the user can determine which frequency hopping configuration to use according to whether the OCC is enabled: If the OCC (the first three cases) is enabled, the base station is not enabled. Band hopping and sequence hopping. If OCC is not enabled (fourth case), the frequency hopping configuration of the cell is used.

Solution 2: Use 1-bit signaling to indicate a frequency hopping configuration or an OCC configuration, and another configuration is bound to it;

 In the second scheme, how to perform weighting after enabling the OCC can use the existing related technologies, and is not described in detail here.

 For example, the base station can use 1-bit signaling to indicate whether to disable the group hopping and sequence hopping function. If the terminal needs to know the configuration of the OCC, it can be obtained according to the configuration of the frequency hopping: If the frequency hopping function is disabled, enable OCC function (not necessarily the user's DMRS transmission uses OCC, just indicates that OCC is available).

 The base station may add a number of bits in the RRC signaling of each UE to indicate the frequency hopping configuration and OCC configuration of the terminal, and the indication scheme is as follows. The indication bits are all UE-specific, that is, only valid for the terminal that receives the indication bit.

Solution 3: Use 1-bit high-level signaling to indicate frequency hopping configuration or OCC configuration, and another configuration is bound to it; Indication bit hopping configuration 0CC configuration

 0 Disable group hopping or sequence hopping enable 0CC function

 1 group hopping and sequence hopping 小区 cell configuration is not enabled 0CC function

 In the third scheme, how to perform weighting after enabling the OCC, the existing related technologies can be used, and are not described in detail herein.

 For example, the base station can use 1-bit signaling to indicate whether to disable the group hopping and sequence hopping function. If the terminal needs to know the configuration of the OCC, it can be obtained according to the configuration of the frequency hopping: If the frequency hopping function is disabled, enable OCC function (not necessarily the user's DMRS transmission uses OCC, just indicates that OCC is available).

 After receiving the OCC or the frequency hopping configuration indication bit sent by the base station, the terminal determines how to perform OCC weighting on the DMRS sequence of each DMRS port according to the content indicated by the indication bit, and determines whether to perform group hopping or sequence hopping.

 The invention has wide applicability and can be applied to any antenna number and antenna array (such as line array, polarization array), any duplex system (TDD system or FDD system) and any transmission mode (such as SU-MIMO, MU- Uplink transmission under MIMO, CoMP). In particular, the content indicated by the different indication bits is exchangable, that is, the indication content of a certain indication bit may be interchanged with the indication content of any other indication bit in the same table, as long as the indication content does not exceed the scope of the listed table. , are within the protection scope of this patent.

 The joint indication method and apparatus for the OCC configuration and the frequency hopping configuration of the present invention use the downlink control channel (PDCCH) or the RRC signaling to indicate the uplink OCC configuration or the frequency hopping configuration, and reduce the signaling by the binding relationship configured by the two. Overhead. The invention has the following advantages:

 (1) Flexible, can support OCC configuration indications of various scenarios, including high-order MU-MIMO;

 (2) Low complexity, can follow the existing CS indication of R8, and the method is simple;

 (3) The user can know whether the OCC is enabled through this indication method, and know whether group hopping or sequence hopping is needed to increase the flexibility of scheduling;

 (4) The application scenario of the OCC is increased, even in the cell of the group hopping/sequence hopping.

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. Where in the essence of the invention Any modifications, equivalent substitutions, improvements, etc., made within the scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim An orthogonal coverage code configuration and a frequency hopping configuration indication method, the method comprising:  The base station indicates, by signaling, an orthogonal cover code configuration or a frequency hopping configuration, wherein the orthogonal cover code configuration and another configuration of the frequency hopping configuration are bound thereto, and have a predetermined mapping relationship.  The method according to claim 1, wherein the base station indicates an orthogonal coverage code configuration or a frequency hopping configuration to the terminal by using a downlink control message of the downlink control channel or radio resource control signaling of the terminal.  The method according to claim 2, wherein the base station indicates the orthogonal cover code configuration by using 2-bit signaling in the downlink control message.  The method according to claim 3, wherein the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:  Mapping relationship 1. All demodulation reference signal ports are weighted by the orthogonal cover code of [1, 1], and group hopping or sequence hopping is not enabled;  Mapping relationship 2, part of the demodulation reference signal port is weighted by the orthogonal cover code of [1, 1], and other demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], and group hopping is not enabled. Frequency or sequence hopping;  Mapping relationship three, all demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], and group hopping or sequence hopping is not enabled;  The mapping relationship is four, the orthogonal cover code function is not enabled, and the group hopping and sequence hopping are used for cell configuration.  The method according to claim 2, wherein the base station indicates the orthogonal cover code configuration or the frequency hopping configuration by using 1-bit signaling in the downlink control message.  The method according to claim 5, wherein the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is: The mapping relationship is one. The group hopping or sequence hopping is not enabled, and the orthogonal cover code function is enabled. Mapping relationship 2, group hopping and sequence hopping use cell configuration, orthogonal coverage code function is not enabled • 6 fi匕.  The method according to claim 2, wherein the base station indicates the orthogonal cover code configuration or the frequency hopping configuration by using 1-bit high layer signaling in the RRC control signaling.  The method according to claim 7, wherein the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:  Mapping relationship 1, the group hopping or sequence hopping is not enabled, and the orthogonal cover code function is enabled; the mapping relationship 2, the group hopping and the sequence hopping are used in the cell configuration, and the orthogonal cover code function is not enabled. • 6 fi匕.  9. The method according to claim 1, wherein the terminal performs orthogonal cover code weighting according to the received orthogonal cover code configuration or a frequency hopping configuration and determines whether to perform group hopping or sequence hopping.  An orthogonal coverage code configuration and frequency hopping configuration indication device, comprising: a signaling setting unit, configured to set an orthogonal coverage code configuration or a frequency hopping configuration to signaling sent to a terminal, where And the other configuration of the orthogonal cover code configuration and the frequency hopping configuration is bound thereto, and has a predetermined mapping relationship;  a signaling sending unit, configured to send the set signaling to the terminal.  The apparatus according to claim 10, wherein the signaling setting unit sets the orthogonal cover code configuration or the frequency hopping configuration in a downlink control message or a radio resource control signaling of a downlink control channel. .  The device according to claim 11, wherein the signaling setting unit sets 2 bits in the downlink control message to indicate orthogonal cover code configuration.  13. The apparatus according to claim 12, wherein the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:  Mapping relationship 1. All demodulation reference signal demodulation reference signal ports are weighted by the orthogonal cover code orthogonal cover code of [1, 1], and group hopping or sequence hopping is not enabled; Mapping relationship 2, part of the demodulation reference signal port is weighted by the orthogonal cover code of [1, 1], and other demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], and group hopping is not enabled. Frequency or sequence Frequency hopping  Mapping relationship three, all demodulation reference signal ports are weighted by the orthogonal cover code of [1, -1], and group hopping or sequence hopping is not enabled;  The mapping relationship is four, the orthogonal cover code function is not enabled, and the group hopping and sequence hopping are used for cell configuration.  The device according to claim 11, wherein the signaling setting unit sets 1 bit in the downlink control message to indicate an orthogonal cover code configuration or a frequency hopping configuration.  The device according to claim 14, wherein the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:  Mapping relationship 1, the group hopping or sequence hopping is not enabled, and the orthogonal cover code is enabled;  Mapping relationship 2, group hopping and sequence hopping use cell configuration, orthogonal coverage code is not enabled. The device according to claim 11, wherein the signaling setting unit sets 1-bit high-level signaling in the RRC control signaling, to indicate the orthogonal cover code configuration or the Frequency hopping configuration.  17. The apparatus according to claim 16, wherein the predetermined mapping relationship between the orthogonal cover code configuration and the frequency hopping configuration is:  Mapping relationship 1, the group hopping or sequence hopping is not enabled, and the orthogonal cover code function is enabled; the mapping relationship 2, the group hopping and the sequence hopping are used in the cell configuration, and the orthogonal cover code function is not enabled. •6 fi匕  .  18. A terminal, comprising:  a signaling receiving unit, configured to receive signaling configured with an orthogonal cover code configuration or a frequency hopping configuration, where the orthogonal cover code configuration and another configuration of the frequency hopping configuration are bound thereto, and have a predetermined Mapping relations;  And a processing unit, configured to determine how to perform orthogonal cover code weighting according to the orthogonal cover code configuration or a frequency hopping configuration in the received signaling, and determine whether to perform group hopping or sequence hopping.