CN1983916B - A Redundant Version Reconfiguration Method - Google Patents

Abstract

The present invention discloses a redundancy version reconfiguration method, which includes: the radio network controller RNC acquires the mode of the redundancy version used by the user equipment UE in the current cell and the support of the target cell to be added in the active set of the UE Redundancy version mode, it is determined that the redundancy version mode supported by the target cell is not compatible with the redundancy version mode used by the UE in the current cell; the RNC carries the redundancy version reconfiguration message in the active set update message sent to the UE Configuration information: UE reconfigures its own redundancy version according to the redundancy version reconfiguration information in the active set update message. According to the method disclosed in the present invention, the time overhead of reconfiguring the redundant version can be shortened, thereby reducing the time required for updating the active set.

Description

A Redundant Version Reconfiguration Method

technical field

The invention relates to wireless communication technology, in particular to a redundant version reconfiguration method.

Background technique

Uplink High Speed Packet Scheduling (HSUPA) technology is a new technology introduced by 3GPP in the R6 protocol to improve the uplink transmission rate. HSUPA adopts fast hybrid automatic retransmission (HARQ) technology, and the user's uplink throughput rate has been greatly improved.

The HARQ redundancy version supported by the uplink has two modes: Chase combination (CC, Chase-combination) and incremental redundancy (IR, Incremental-Redundancy). CC is a special case of IR. IR is compatible with CC, but CC is not compatible with IR, that is: when using CC for encoding, you can use CC for decoding, or you can also use IR for decoding; while using IR for encoding, you can only use IR for decoding, not CC for decoding. When transmitting data between UE and NodeB, it is necessary to use mutually compatible redundancy versions for encoding and decoding. Usually, the UE can support the above two redundancy versions at the same time, and the NodeB can also support the above two redundancy versions at the same time, but in some cases, the NodeB only supports the CC mode redundancy version. All the cells under the NodeB can use the same redundancy version or different redundancy versions.

The RNC configures different redundancy versions for the UE and the NodeB according to the redundancy version support capabilities of the UE and the NodeB and the requirements for data transmission, and can also configure different redundancy versions for different cells of a NodeB.

RNC configures redundancy versions for UE and NodeB through the following methods.

When the UE newly joins the network or establishes a wireless link, the RNC sends messages such as radio bearer reconfiguration (RADIO BEARER RECONFIGURATION), radio bearer setup (RADIOBEARER SETUP), and transmission channel reconfiguration (TRANSPORT CHANNELRECONFIGURATION) to the UE. The message carries " HARQ info for E-DCH" information element, the UE configures its own redundancy version according to the redundancy version specified by the "HARQ info for E-DCH" information element.

When a new NodeB is established or a wireless link is established, the RNC sends a radio link setup request (RADIO LINK SETUP REQUEST), a radio link reconfiguration preparation (RADIO LINKRECONFIGURATION PREPARE), and a radio link reconfiguration request (RADIO LINKRECONFIGURATION REQUEST) to the NodeB Waiting for the message, the message carries the "HARQ info for E-DCH" information element, and the NodeB configures the redundancy version of the cell under its control according to the redundancy version specified by the "HARQ info for E-DCH" information element.

The definition of the "HARQ info for E-DCH" information element mentioned above is shown in Table 1.

cell Necessity value describe HARQ RV Configuration required CC, IR "CC" means Chase Merge; "IR" means Incremental Redundancy Merge.

Table I

During the handover process, when a new target cell needs to be added in the active set, if the target cell supports a redundancy version incompatible with the redundancy version used by the UE's current cell, the RNC will To be able to use mutually compatible redundancy versions, it is necessary to reconfigure the redundancy version for the UE, and further reconfigure the redundancy version for the current cell, so that all cells and UEs in the active set use mutually compatible redundancy versions.

The method for implementing redundant version reconfiguration in the process of updating the active set will be described below with reference to specific examples.

Assumption: cell 1 supports redundancy versions of CC and IR modes, cell 2 only supports redundancy versions of CC modes, and UE supports redundancy versions of CC and IR modes. The NodeB where the cell 1 is located is denoted as NodeB1, and the NodeB where the cell 2 is located is denoted as NodeB2. The UE is currently located within the range of the cell 1, and reports a handover measurement report to the RNC after measuring neighboring cells. After receiving the handover measurement report from the UE, the RNC selects a target cell that satisfies the handover condition according to the handover measurement report, and the target cell is cell 2 . At this time, the RNC needs to update the active set of the UE. According to the above-mentioned assumption that the cell and the UE support the redundancy version, the UE and the current cell 1 use the redundancy version of the IR mode to encode and decode data, while the cell 2 only supports the redundancy version of the CC mode. Therefore, in the process of updating the active set, the RNC also needs to reconfigure the redundant version of UE and cell 1, and its processing process is shown in Figure 1, and the detailed description is as follows:

Step 101: RNC sends to NodeB1 where cell 1 is located a radio link reconfiguration message carrying the "HARQ info for E-DCH" information element whose redundancy version is CC mode, and NodeB1 according to the information specified in the "HARQinfo for E-DCH" information element Redundancy version of cell 1, reconfigure the redundancy version of cell 1 to CC mode.

Step 102: The RNC sends to the UE a transport channel reconfiguration message carrying a "HARQ info for E-DCH" cell whose redundancy version is CC mode, and the UE uses the redundancy version specified in the "HARQ info for E-DCH" cell , reconfigure its own redundancy version to CC mode, and return a transport channel reconfiguration complete message to the RNC.

Step 103: the RNC sends a radio link reconfiguration message to the NodeB2 where the cell 2 is located.

Step 104: RNC sends an active set update (Active Set Update) message to UE.

As mentioned above, during the active set update process, if the redundancy version supported by the target cell is different from the redundancy version used by the current cell, the redundancy versions of the current cell and UE need to be reconfigured. In the prior art, when the redundancy version needs to be reconfigured during the active set update process, the RNC notifies the UE to reconfigure the redundancy version through the transport channel reconfiguration message as described in step 102 above before sending the active set update message to the UE , therefore, the active set update process additionally requires the time overhead of reconfiguring the redundancy version for the UE as shown in step 102, so that the active set update takes a relatively long time.

In addition, in the prior art, since the time when the new redundancy version takes effect is not set when the redundancy version is reconfigured, if the UE and the current cell do not enable the new redundancy version to encode and decode data at the same time, it will cause cannot be decoded correctly.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a redundant version reconfiguration method to shorten the time overhead of reconfiguring the redundant version.

In order to achieve the above object, the present invention provides a hybrid automatic repeat transmission HARQ redundancy version reconfiguration method, in the active set update process, the method includes:

a. The radio network controller RNC obtains the mode of the HARQ redundancy version used by the user equipment UE in the current cell and the mode of the HARQ redundancy version supported by the target cell to be added in the active set of the UE, and the mode supported by the target cell When the mode of the HARQ redundancy version is not compatible with the mode of the HARQ redundancy version used by the UE in the current cell, it is determined that the HARQ redundancy version of the UE needs to be reconfigured;

b. RNC carries the information of the HARQ redundancy version mode supported by the target cell to be added in the active set of the UE in the active set update message sent to the UE;

c. The UE reconfigures its own HARQ redundancy version according to the information of the HARQ redundancy version mode in the active set update message, and the UE reconfigures its own HARQ redundancy version to be added in the active set of the UE The mode of the HARQ redundancy version supported by the target cell.

In step a, the mode of the HARQ redundancy version used by the UE in the current cell is the incremental redundancy IR mode, and the mode of the HARQ redundancy version supported by the target cell to be added in the active set of the UE is only Chase combined CC model;

The information of the mode of the HARQ redundancy version supported by the target cell to be added in the active set of the UE carried in the active set update message in step b is: the information that the HARQ redundancy version is CC mode;

In step c, the UE reconfigures its own HARQ redundancy version to CC mode.

The active set update message sent by the RNC to the UE in step b further includes an activation time;

In step c, the UE reconfiguring its own HARQ redundancy version further includes: setting the reconfigured HARQ redundancy version to take effect from the activation time.

The information carried in the active set update message in step b of the HARQ redundancy version mode supported by the target cell to be added in the active set of the UE is: an information element is added in the active set update message, and the added information element It carries information about the mode of the HARQ redundancy version supported by the target cell to be added in the active set of the UE.

The added information element is HARQ info for E-DCH.

After the step a, further include:

The RNC sends a radio link reconfiguration message to the NodeB where the current cell is located, and the radio link reconfiguration message carries the information of the HARQ redundancy version mode supported by the target cell to be added in the active set of the UE;

The NodeB where the current cell is located reconfigures the HARQ redundancy version of the current cell according to the information about the HARQ redundancy version mode supported by the target cell to be added in the active set of the UE in the radio link reconfiguration message The mode of the HARQ redundancy version supported by the target cell to be added in the active set of the UE.

After the step a, further include:

The RNC sends a radio link reconfiguration message to the NodeB where the current cell is located, and the radio link reconfiguration message carries the information that the HARQ redundancy version is CC mode;

The NodeB where the current cell is located reconfigures the HARQ redundancy version of the current cell to be the CC mode according to the information that the HARQ redundancy version is the CC mode in the radio link reconfiguration message.

The information about the HARQ redundancy version mode carried in the radio link reconfiguration message is: information elements are set in the radio link reconfiguration message, and the set information elements carry information to be added in the active set of the UE. Information about the mode of the HARQ redundancy version supported by the target cell.

The set information element is HARQ info fir E-DCH.

The radio link reconfiguration message sent by the RNC to the NodeB where the current cell is located further includes an activation time;

The NodeB reconfiguring the HARQ redundancy version of the current cell further includes: setting the reconfigured HARQ redundancy version to take effect from the activation time.

The RNC maintains and establishes a HARQ redundancy version support capability table with a corresponding relationship between cells and HARQ redundancy versions;

The acquisition mode of the HARQ redundancy version supported by the target cell in step a is: the RNC searches the HARQ redundancy version support capability table, and obtains the mode of the HARQ redundancy version supported by the target cell according to the search result.

According to the method provided by the present invention, when the redundant version of the UE needs to be reconfigured during the active set update process, the RNC sends the active set update message to the UE to carry the redundant version change information, which shortens the time overhead for reconfiguring the redundant version , thereby reducing the time required for activation set updates. Moreover, when reconfiguring the redundancy version, the new redundancy version is set to take effect at the activation time, so that the redundancy version used by the UE and the cell can be guaranteed to be consistent before and after the activation time, so that decoding can be performed correctly.

Description of drawings

FIG. 1 shows a message flow chart of reconfiguring redundant versions during the active set update process in the prior art;

FIG. 2 is a flow chart of reconfiguring a redundant version in an embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, specific examples are given below to further describe the present invention in detail.

The invention provides a method for reconfiguring the redundant version during the updating process of the active set. The active set update is usually performed under the following conditions: for example, the UE is currently within the range of cell 1, and after measuring the adjacent cells, reports the handover measurement report to the RNC. After receiving the handover measurement report from the UE, the RNC selects a target cell that satisfies the handover condition according to the handover measurement report, and the target cell is represented by cell 2 . After determining the target cell, the RNC needs to update the active set of the UE. Then, in the process of updating the active set, the RNC determines whether the redundancy version needs to be reconfigured according to the use of the redundancy version by each cell and UE.

The main idea of the redundancy version reconfiguration provided by the present invention is: when the RNC determines that the redundancy version supported by the target cell to be added in the active set of the UE is not compatible with the redundancy version used by the UE in the current cell, update the active set The message notifies the UE to reconfigure the redundancy version.

FIG. 2 is a flow chart of reconfiguring redundant versions during the active set update process in an embodiment of the present invention, including the following steps:

Step 201: The RNC obtains the redundancy version mode used by the UE that needs to update the active set in the current cell 1 and the redundancy version mode supported by the target cell 2, and judges the redundancy version mode supported by the target cell 2 Whether it is compatible with the mode of the redundancy version used by the UE in the current cell 1, if not, go to step 202; if it is compatible, directly update the active set without reconfiguring the redundancy version, and end this process.

In this step 201, judging whether the redundancy version mode supported by the target cell 2 is compatible with the redundancy version mode used by the UE in the current cell 1 can be realized through the following steps 201-1 and 201-2:

Step 201-1: RNC judges whether the redundancy version used by the UE in the current cell 1 is the IR mode, if it is determined that the redundancy version used by the UE in the current cell 1 is the IR mode, then perform step 201-2; if determined The redundancy version used by the UE in the current cell 1 is the CC mode, then it is considered that the redundancy version mode supported by the target cell 2 is compatible with the redundancy version mode used by the UE in the current cell 1, and this procedure ends.

Step 201-2: The RNC judges whether the target cell 2 only supports the redundancy version of the CC mode, and if it is determined that the target cell 2 only supports the redundancy version of the CC mode, it considers that the mode of the redundancy version supported by the target cell 2 is not Compatible with the mode of the redundancy version used by the UE in the current cell 1; if it is determined that the target cell 2 supports at least the redundancy version of the IR mode, it is considered that the mode of the redundancy version supported by the target cell 2 is compatible with the UE in the current The mode of the redundant version used by cell 1 ends this process.

Usually, the RNC can obtain the mode of the redundancy version supported by the target cell 2 according to the history record of the system configuration. In the present invention, the RNC maintains and establishes a redundant version support capability table with the corresponding relationship between each cell under each NodeB and the redundancy version, and the RNC searches the redundancy version support capability table, and obtains the redundant version supported by the target cell 2 according to the search result. version of the schema.

Step 202: The RNC uses the radio link reconfiguration message to reconfigure the redundancy version of the cell 1 where the UE is currently located to be the redundancy version supported by the target cell 2, through the following steps:

Step 202-1: RNC sends a radio link reconfiguration message to NodeB1 where cell 1 is located, the message carries redundancy version reconfiguration information, and the redundancy version reconfiguration information may indicate that the reconfiguration redundancy version is the target The information of the mode of the redundancy version supported by the cell 2, or may be the information of the mode of the redundancy version supported by the target cell 2.

The carrying of the redundancy version reconfiguration information in the radio link reconfiguration message described in step 202-1 may be carried by setting an information element in the radio link reconfiguration message, and the information element may be a The "HARQ Info for E-DCH" information element described above. The configured information element carries redundancy version reconfiguration information, for example, the "HARQ Info for E-DCH" information element carries the information of the redundancy version mode supported by the target cell 2.

Step 202-2: The NodeB1 where the cell 1 is located receives the redundancy version reconfiguration information in the radio link reconfiguration message, and reconfigures the redundancy version of the cell 1 to the mode of the redundancy version supported by the target cell 2 .

NodeB1 can also obtain the activation time from the radio link reconfiguration message, and when reconfiguring the redundancy version for cell 1, set the reconfigured redundancy version to take effect from the activation time.

In this embodiment, the RNC judges whether the redundancy version mode used by the UE in the current cell 1 is compatible with the redundancy version mode supported by the target cell 2 according to steps 201-1 and 201-2. The mode of the redundancy version supported by the target cell 2 is CC mode. Therefore, in this step 202, the RNC reconfigures the redundancy version of the cell 1 to the CC mode.

Through the above steps 202-1 and 202-2, after the redundancy version of cell 1 is reconfigured to CC mode, cell 1 needs to receive data according to the following process: after the activation time arrives, start from the activation time , use the CC mode to decode the received data.

When the NodeB can determine the redundancy version used by the UE through the index identifier or content of the received data, the step of reconfiguring the redundancy version for cell 1 in step 202 can be omitted. If the redundancy version of cell 1 is not reconfigured, after receiving the data, NodeB1 where cell 1 is located determines the redundancy version used by the UE according to the received data, and uses the determined redundancy version to decode the received data.

Step 203: The RNC utilizes the Active Set Update message to reconfigure the redundancy version of the UE to be the redundancy version mode supported by the target cell 2, and reconfigure the redundancy version mode of the UE through the following steps:

Step 203-1: When the RNC sends an Active Set Update message to the UE, the Active SetUpdate message carries redundancy version reconfiguration information, and the redundancy version reconfiguration information may indicate that the reconfiguration redundancy version is the target cell 2 The information about the mode of the supported redundancy version, or may be the information about the mode of the redundancy version supported by the target cell 2 .

The redundant version reconfiguration information carried in the Active Set Update message described in step 203-1 can be carried by adding information elements in the Active Set Update, and the information elements can be the "HARQ Info for E-DCH” cells. The added information element carries redundancy version reconfiguration information, for example, the "HARQ Info for E-DCH" information element carries the information of the redundancy version mode supported by the target cell 2.

Step 203-2: The UE reconfigures its own redundancy version to the mode of the redundancy version supported by the target cell 2 according to the redundancy version reconfiguration information in the Active Set Update message.

The UE can also obtain the activation time from the Active Set Update message, and when reconfiguring the redundancy version, set the newly configured redundancy version to take effect from the activation time.

According to the results of determining whether the redundancy version mode used by the UE in the current cell 1 is compatible with the redundancy version mode supported by the target cell 2 in steps 201-1 and 201-2, the RNC knows that the target cell 2 The mode of the supported redundancy version is CC mode. Therefore, in this step 203, the Active Set Update message sent by the RNC to the UE carries the redundancy version reconfiguration information of the CC mode, and the UE reconfigures its own redundancy version to the CC mode according to the redundancy version reconfiguration information After that, the redundant version of the reconfigured CC mode is used from activation time.

Through the above steps 203-1 and 203-2, after the UE reconfigures its own redundancy version to CC mode, it needs to send data according to the following process: before the activation time arrives, if the UE retransmits to cell 1 data, the data being retransmitted is discarded; after the activation time arrives, starting from the activation time, the UE uses the CC mode to encode the transmission data, and sends them to cell 1 and cell 2 respectively.

The NodeBs where cell 1 and cell 2 are located in the above embodiments may be the same or different NodeBs.

It is assumed that the cell 1 in the above embodiment supports the redundancy versions of the CC and IR modes, the cell 2 only supports the redundancy versions of the CC mode, and the UE supports the redundancy versions of the CC and IR modes. After the redundancy version is reconfigured through the process as shown in Figure 2, the redundancy version used by the UE and the cell in the active set is consistent, so that the data sent by the UE to cell 1 and cell 2 is coded in CC mode, and cell 1 and cell 2 Decode the received data in CC mode.

In the above-mentioned embodiment, when the redundancy version of the UE needs to be reconfigured during the active set update process, the RNC sends the Active Set Update message to the UE to carry the reconfiguration information of the redundancy version, instead of going through the steps in the prior art The radio link reconfiguration message in step 102 notifies the UE to reconfigure the redundancy version, therefore, the time required in step 102 in the prior art is not required, and the time overhead of reconfiguration is shortened, thereby reducing the active set update time required.

Moreover, when the redundancy version is reconfigured, the time when the reconfigured redundancy version takes effect is set, so as to ensure that the redundancy versions used by the UE and the cell are consistent at the same time, so that decoding can be performed correctly.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (11)

1. one kind is mixed re-transmission HARQ redundant edition re-configuration automatically, it is characterized in that in the activating set updating process, this method comprises:

A. radio network controller (RNC) obtains the pattern of the HARQ redundancy versions of the Target cell support that user equipment (UE) will increase in the Active Set of the pattern of the HARQ redundancy versions that current area is used and described UE, during the pattern of the HARQ redundancy versions that the incompatible described UE of pattern of the HARQ redundancy versions of supporting at described Target cell uses in current area, determine to reshuffle the HARQ redundancy versions of described UE;

The information of the pattern of the HARQ redundancy versions that the Target cell that b.RNC carries in the activating set updating message that sends to UE will be increased in the Active Set of described UE is supported;

C.UE is according to the information of the pattern of the HARQ redundancy versions in the described activating set updating message, reshuffle the HARQ redundancy versions of self, the HARQ redundancy versions that described UE reshuffles self is the pattern of the HARQ redundancy versions supported of the Target cell that will increase in the Active Set of described UE.

2. method according to claim 1 is characterized in that,

The pattern of the described UE of step a employed HARQ redundancy versions in current area is an incremental redundancy IR pattern;

The pattern of the HARQ redundancy versions that the Target cell that will increase in the Active Set of the described UE of step a is supported only merges the CC pattern for Chase;

The information of the pattern of the HARQ redundancy versions of the Target cell support that will increase in the Active Set of the described UE that carries in the described activating set updating message of step b is: the HARQ redundancy versions is the information of CC pattern;

The HARQ redundancy versions that the described UE of step c reshuffles self is the CC pattern.

3. method according to claim 1 and 2 is characterized in that,

The described RNC of step b further comprises activationary time to the activating set updating message that UE sends;

The HARQ redundancy versions that the described UE of step c reshuffles self further comprises: be provided with from the described activationary time described HARQ redundancy versions of reshuffling that comes into effect.

4. method according to claim 1 and 2 is characterized in that,

The information of pattern of carrying the HARQ redundancy versions of the Target cell support that will increase in the Active Set of described UE in the described activating set updating message of step b is: increase cell in the described activating set updating message, the information of the pattern of the HARQ redundancy versions that the Target cell that carrying in the cell that is increased will increase in the Active Set of described UE is supported.

5. method according to claim 4 is characterized in that, the cell of described increase is HARQ infofor E-DCH.

6. method according to claim 1 is characterized in that, further comprises after the described step a:

RNC sends radio link reconfiguration message to the NodeB at described current area place, the information of the pattern of the HARQ redundancy versions that the Target cell that carrying in this radio link reconfiguration message will increase in the Active Set of described UE is supported;

The information of the pattern of the HARQ redundancy versions that described current area place NodeB supports according to the Target cell that will increase in the Active Set of the described UE in the described radio link reconfiguration message, the HARQ redundancy versions of reshuffling described current area are the pattern of the HARQ redundancy versions of the Target cell support that will increase in the Active Set of described UE.

7. method according to claim 2 is characterized in that, further comprises after the described step a:

RNC sends radio link reconfiguration message to the NodeB at described current area place, carries the information that the HARQ redundancy versions is the CC pattern in this radio link reconfiguration message;

Described current area place NodeB is the information of CC pattern according to the HARQ redundancy versions in the described radio link reconfiguration message, and the HARQ redundancy versions of reshuffling described current area is the CC pattern.

8. according to claim 6 or 7 described methods, it is characterized in that, the information of the pattern of the HARQ redundancy versions that carries in the described radio link reconfiguration message is: in the described radio link reconfiguration message cell is set, the information of the pattern of the HARQ redundancy versions that the Target cell that carrying in the set cell will increase in the Active Set of described UE is supported.

9. method according to claim 8 is characterized in that, the cell of described setting is HARQ infofor E-DCH.

10. according to claim 6 or 7 described methods, it is characterized in that,

Described RNC further comprises activationary time to the radio link reconfiguration message that the NodeB at described current area place sends;

The HARQ redundancy versions that described NodeB reshuffles current area further comprises: be provided with from the described activationary time described HARQ redundancy versions of reshuffling that comes into effect.

11. method according to claim 1 is characterized in that,

RNC safeguards the HARQ redundancy versions tenability table that establishes sub-district and HARQ redundancy versions corresponding relation;

The described pattern of obtaining the HARQ redundancy versions of Target cell support of step a is: RNC searches described HARQ redundancy versions tenability table, obtains the pattern of the HARQ redundancy versions that Target cell supports according to lookup result.

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