CN101860893A

CN101860893A - Method and device for receiving information by high speed shared information channels (HS-SICH)

Info

Publication number: CN101860893A
Application number: CN200910081588A
Authority: CN
Inventors: 杨宇
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: China Academy of Telecommunications Technology CATT; Datang Mobile Communications Equipment Co Ltd
Priority date: 2009-04-13
Filing date: 2009-04-13
Publication date: 2010-10-13
Anticipated expiration: 2029-04-13
Also published as: CN101860893B

Abstract

The invention discloses a method and a device for receiving information by high speed shared information channels (HS-SICH), which are used for improving the utilization rate of HS-SICH resources and the signal receiving quality of the HS-SICH. The method for receiving the information by the HS-SICHs comprises that: a base station allocates an identical high speed shared control channel (HS-SCCH) for each user equipment in each group obtained by grouping according to space division multiple access (SDMA) pairing grouping conditions, and allocates a plurality of different HS-SICHs for the user equipment in the group; and for the user equipment in each group, the base station indicates the user equipment in the group by the HS-SCCHs allocated for the user equipment to transmit the information to the base station by adopting the HS-SICHs allocated for the user equipment, and simultaneously receives the information from the user equipment in the group by the plurality of different HS-SICHs.

Description

Method and device for receiving information through HS-SICH

Technical Field

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for receiving Information through a High Speed Shared Information Channel (HS-SICH).

Background

Space Division Multiple Access (SDMA), which is a Space Division Multiple Access (SDMA) technique, distinguishes a plurality of User Equipments (UEs) occupying the same resource (time slot, code channel, frequency) by using spatial degrees of freedom provided by Multiple antennas, thereby implementing data transmission and reception of the plurality of UEs. By the SDMA technique, the average data transmission rate of the cell can be increased.

The manner in which SDMA is implemented is related to the multiple antenna technique employed. In the intelligent antenna array, the space division of multi-user equipment is carried out by using a multi-beam forming technology, a plurality of main beams are aligned to user equipment occupying the same resource for data receiving and sending, on one hand, the signal-to-interference ratio of the expected user equipment is directly improved through beam forming, and therefore the performance of a system or the frequency spectrum utilization rate is improved; on the other hand, limited spectrum resources are multiplexed through beamforming.

A multi-user equipment MIMO (MU-MIMO) technology is used in a multi-Input multi-Output (MIMO) antenna array, the spatial separation characteristic of user equipment is utilized to carry out pre-interference elimination at a transmitting end, and different weighting vectors are adopted by a base station array antenna for different user equipment using the same resource, so that the interference among the user equipment can be reduced.

An intelligent antenna technology is used in a Time Division Duplex (TDD) High-Speed Packet Access (HSPA) system, and an MIMO technology is introduced in a High-Speed Packet Access (HSPA +, High Speed Packet Access Plus) system which is evolved subsequently, so that the TDD system has a basis for applying SDMA.

In HSPA + systems, the cell average user equipment throughput can be further significantly improved if SDMA is implemented using MU-MIMO techniques. A plurality of user equipment pairs are grouped, and each group of user equipment shares code channel time slot resources but is allocated with different channel estimation windows. After being scheduled by the base station, the user equipment in the SDMA group receives the data transmitted by a high-speed physical downlink shared channel (HS-PDSCH) or an uplink enhanced physical channel (E-PUCH) on the same resource, and the corresponding MIMO realization technologies are downlink MU-MIMO and uplink MU-MIMO.

In the TDD system, the uplink feedback control channel HS-SICH is responsible for carrying hybrid automatic repeat request (HARQ) acknowledgement information (ACK/NACK) and channel quality indication information (CQI) for data on the HS-PDSCH, and also carries power control information (TPC) and Synchronization Shift (SS) information, but has no Transport Format Combination Indicator (TFCI). One HS-SICH channel occupies 1 code channel with spreading factor SF-16.

When downlink data needs to be sent, a base station (Node B) firstly sends downlink scheduling and control information on a high-speed shared control channel (HS-SCCH) to indicate that user equipment has HSDPA data on a subsequent HS-PDSCH, UE receives a transmission block by reading the HS-SCCH channel, and then utilizes the HS-SICH channel corresponding to the HS-SCCH to feed back ACK/NACK information and channel quality indication information to the Node B.

In the prior art, SDMA technology is generally adopted for a traffic channel (such as HS-PDSCH), and the same or different channel estimation windows can be allocated to spatial user equipments occupying the same traffic channel. A plurality of space division user equipments simultaneously occupy the same time slot code channel and are scheduled by the base station, so that compared with the case of not introducing SDMA technology, the average throughput of the cell can be greatly improved, but in order to schedule more user equipments, more control channel overhead is needed to meet the requirement of further scheduling space division user equipments on the basis of time division and code division, however, the control channel resources in the cell are limited.

And the control channel adopts SDMA technology, so that when a plurality of space division user equipment simultaneously use the same control channel, different user equipment can be distinguished only by space angle isolation, but because the requirement of the control channel on performance is higher than that of a service channel, if the space division user equipment receives respective control channels only by space angle isolation, the mutual interference is larger, and the performance is inevitably poorer. Especially, when the HS-SICH of multiple user equipments uses SDMA technique, the ACKs and CQIs of multiple user equipments are all superimposed on one code channel with SF of 16, so that not only the channel estimation is inaccurate, but also the decoding performance of the data portion is seriously deteriorated.

In summary, the utilization rate of HS-SICH channel resources in the prior art is low, and the quality of signals received through HS-SICH is poor.

Disclosure of Invention

The embodiment of the invention provides a method and a device for receiving information through HS-SICH, which are used for improving the utilization rate of HS-SICH channel resources and improving the quality of HS-SICH receiving signals.

The method for receiving information through the HS-SICH provided by the embodiment of the invention comprises the following steps:

the base station distributes the same high-speed shared control channel HS-SCCH for each user equipment in each group obtained by grouping according to space division multiple access SDMA pairing grouping conditions, and distributes a plurality of different HS-SICHs for the user equipment in the group;

for each group of user equipment, the base station indicates each user equipment in the group to adopt the HS-SICH allocated to the user equipment to send information to the base station through the HS-SCCH allocated to the group of user equipment, and simultaneously receives the information sent by the group of user equipment through a plurality of different HS-SICHs.

The base station provided by the embodiment of the invention comprises:

a grouping unit, configured to group a plurality of user equipments that satisfy a preset SDMA (space division multiple access) pairing grouping condition;

the channel allocation unit is used for allocating the same high-speed shared control channel HS-SCCH for each user equipment in each group obtained by grouping according to space division multiple access SDMA pairing grouping conditions and allocating a plurality of different HS-SICHs for the user equipment in the group;

an indicating unit, configured to indicate, for each group of user equipment, each user equipment in the group to send information to the base station by using the HS-SICH allocated to the user equipment through the HS-SCCH allocated to the group of user equipment;

and the information receiving unit is used for simultaneously receiving the information sent by each group of user equipment through a plurality of different HS-SICHs.

The base station distributes the same HS-SCCH for each user equipment in each group obtained by grouping according to the SDMA pairing grouping condition, and distributes a plurality of different HS-SICHs for the user equipment in the group; for each group of user equipment, the base station indicates each user equipment in the group to adopt the HS-SICH allocated to the user equipment to send information to the base station through the HS-SCCH allocated to the group of user equipment, and simultaneously receives the information sent by the group of user equipment through a plurality of different HS-SICHs, so that the resource utilization rate of the HS-SICH is improved, the quality of HS-SICH receiving signals is improved, the interference among the HS-SICH channels of each space division user equipment is reduced, and the performance of the HS-SICH channels and the cell capacity are improved.

Drawings

Fig. 1 is a schematic flowchart of a method for receiving information via HS-SICH according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a communication system according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.

Detailed Description

The embodiment of the invention realizes SDMA of the HS-SICH of the uplink control channel in a TDD system and receives information through the HS-SICH, thereby improving the utilization rate of HS-SICH channel resources and improving the quality of HS-SICH receiving signals.

When a cell is established, a Radio Network Controller (RNC) configures control channel resources for a base station through an Iub interface between the RNC and the base station, wherein the control channel resources comprise the number of control channels in the cell and resources allocated to the control channels. For example, four pairs of control channels, namely four pairs of high speed shared control channels (HS-SCCH) and HS-SICH, are allocated to a certain cell, and the time slot code channel resources occupied by the control channels are also specified. When a user accesses, the RNC sends a Radio Resource Control (RRC) signaling to the UE to establish a radio link, wherein the RNC comprises indication information of HS-SCCH which the UE needs to monitor.

The technical solution provided by the embodiment of the present invention is explained below with reference to the accompanying drawings.

Referring to fig. 1, a method for receiving information through an HS-SICH according to an embodiment of the present invention includes the steps of:

s101, grouping a plurality of user equipment meeting preset space division multiple access SDMA pairing grouping conditions by a base station.

S102, the base station allocates the same HS-SCCH for each user equipment in each group obtained by grouping according to the SDMA pairing grouping condition, and allocates a plurality of different HS-SICHs for the user equipment in the group.

S103, for each group of user equipment, the base station indicates each user equipment in the group to send information to the base station by adopting the HS-SICH distributed for the user equipment through the HS-SCCH distributed for the group of user equipment.

And S104, for each group of user equipment, the base station simultaneously receives the information sent by the group of user equipment through a plurality of different HS-SICHs.

Preferably, step S101 includes: the base station realizes space division of a plurality of user equipment through a beam forming technology, which has a strict requirement on the isolation between users, namely, the user equipment can be paired into a group of SDMA user equipment as long as the isolation is larger than a preset threshold value. Specifically, the base station performs uplink channel estimation on the user equipment accessed in the cell, schedules the user equipment by combining channel quality, priority and the like, if the time slot code channel resources are occupied, the user equipment is considered to be subjected to space division scheduling by adopting an SDMA (space division multiple access) technology, compares the isolation between the user equipment with higher scheduling priority and other user equipment with lower scheduling priority with a preset threshold, and considers that the user equipment meets the SDMA pairing grouping condition when the threshold requirement is met.

The isolation may be a spatial angle isolation between the user equipments, or a mutual interference degree between the user equipments.

And after the SDMA pairing grouping is successful, the UE in each group uses the same HS-SCCH and occupies the same time slot code channel and the same channel estimation window.

Preferably, step S102 includes:

for each group of user equipment, the base station distributes the same HS-SCCH for each user equipment in the group and determines a plurality of HS-SICHs corresponding to the HS-SCCH; allocating different ones of the plurality of HS-SICHs to different user devices in the group; or allocating a plurality of HS-SICHs to the group of user equipment, wherein each HS-SICH corresponds to the plurality of user equipment in the group, namely allocating a plurality of HS-SICHs for each group, and each HS-SICH is allocated to the plurality of user equipment in the group.

Alternatively, step S102 includes:

for each group of user equipment, the base station distributes the same HS-SCCH for each user equipment in the group, and determines HS-SICHs which are in one-to-one correspondence with the HS-SCCHs; determining the HS-SICH corresponding to the same channel estimation window according to the number of the channel estimation windows; different HS-SICHs corresponding to the same channel estimation window are distributed to different user equipment in the group of user equipment; or allocating a plurality of different HS-SICHs corresponding to the same channel estimation window to the group of user equipment, wherein each HS-SICH corresponds to a plurality of user equipment in the group.

Preferably, step S103 includes:

for each group of user equipment, the base station informs the user equipment of the identification of the HS-SICH allocated to each user equipment in the group through the HS-SCCH allocated to the group of user equipment, and instructs the user equipment to adopt the HS-SICH corresponding to the identification to send information to the base station.

Preferably, the identifier of the HS-SICH is a code channel offset value of the HS-SICH, or a time slot code channel number of the HS-SICH, or a relative position identifier of the HS-SICH in all HS-SICHs corresponding to the same HS-SCCH.

The code channel offset value of the HS-SICH is the code channel offset value of the HS-SICH in a plurality of HS-SICHs under the same channel estimation window.

The time slot code channel number of the HS-SICH is the absolute position identification of the HS-SICH, namely, the code channel under which time slot the HS-SICH is on is indicated.

The relative position identification of the HS-SICH in all the HS-SICHs corresponding to the same HS-SCCH with the HS-SICH is used for identifying the relative position of the HS-SICH in a plurality of HS-SICHs under the condition that the same HS-SCCH corresponds to the plurality of HS-SICHs. If the plurality of HS-SICHs corresponding to the same HS-SCCH occupy the same time slot, the relative position mark is the relative position mark of the code channel number, and if the plurality of HS-SICHs corresponding to the same HS-SCCH occupy different time slots, the relative position mark is the relative position mark of the code channel number of the time slot.

The slot code channel number (absolute position identification) of the HS-SICH needs to occupy a little more bits, and the relative position identification of the HS-SICH in all the HS-SICHs corresponding to the same HS-SCCH per se occupies less bits.

Alternatively, step S103 includes:

for each group of user equipment, the base station informs the user equipment of the information of the channel estimation window of the HS-PDSCH allocated to each user equipment in the group through the HS-SCCH allocated to the group of user equipment, and instructs the user equipment to adopt the HS-SICH corresponding to the channel estimation window to send the information to the base station.

Preferably, the information of the channel estimation window is a window number of the channel estimation window or a parity of the window number of the channel estimation window.

Two specific examples are given below.

Example 1:

the corresponding relation between HS-SCCH and HS-SICH is specified in the current standard, and the time slot code channel occupied by HS-SCCH and HS-SICH is notified to the base station and UE by high-level signaling. In the embodiment, the one-to-many correspondence relationship between the HS-SCCHs and the HS-SICHs is preset, that is, each HS-SCCH corresponds to a plurality of HS-SICHs. Namely, each HS-SCCH is preset to correspond to N HS-SICHs (N is more than 1), and one HS-SICH is set as a main HS-SICH.

When a cell is established and a radio link of user equipment is established, a Radio Network Controller (RNC) informs Node B and UE of configuration information of HS-SCCH and HS-SICH through high-level signaling, wherein the configuration information comprises the following steps: the corresponding relation between the HS-SCCH and the HS-SICH, and the time slot code channels occupied by the HS-SCCH and the HS-SICH.

Node B schedules the accessed user equipment, if the user equipment does not meet the SDMA pairing grouping condition, the user equipment does not adopt the SDMA technology, and at the moment, UE reports relevant information to the base station by using a main HS-SICH corresponding to the HS-SCCH; if a plurality of user equipment in the cell meets the SDMA pairing grouping condition, the user equipment is grouped, and the space division of the control channel is carried out on the group of the user equipment.

For each group of SDMA user equipment, a high-level signaling is needed to inform the corresponding relation between the HS-SCCH and the HS-SICH and the time slot code channels occupied by the HS-SCCH and the HS-SICH, and the Node B and the UE are also needed to inform which one of a plurality of HS-SICHs corresponding to each HS-SCCH is the main HS-SICH, so that the user equipment which does not use the SDMA technology can adopt the main HS-SICH to report information to the base station.

Or, rather than notifying which HS-SICH is the main HS-SICH by high-level signaling, a certain HS-SICH corresponding to the Node B and the UE default HS-SCCH is the main HS-SICH, for example, when a plurality of HS-SICHs are located in different time slots, the HS-SICH located in the time slot with the lowest sequence number in the HS-SICHs is defined as the main HS-SICH, and when a plurality of HS-SICHs are located in different code channels of the same time slot, the HS-SICH located in the code channel with the lowest sequence number in the HS-SICHs can be defined as the main HS-SICH. Of course, other default relationships may be used.

The Node B explicitly informs the UE in each group of the HS-SCCH by adding signaling bits, or implicitly informs the UE in each group of the HS-SCCH that the received HS-SCCH applies SDMA technology by using unused signaling bit states (without adding signaling bits).

Informing the UE whether the HS-SCCH applies SDMA technology, adding a bit on the HS-SCCH to inform explicitly, for example: and adding 1 bit, wherein the bit of 1 indicates that the HS-SCCH applies SDMA, and otherwise, the bit of 0. Alternatively, implicit notification is made with a different format of the HS-SCCH channel or unused signaling bit status, such as: to indicate whether the HS-SCCH applies the SDMA technique, a different total signaling length, or two unused states other than the existing defined signaling bit states, etc. may be used.

After knowing that the HS-SCCH applies the SDMA technology, the UE in the group needs to use different HS-SICHs corresponding to the HS-SCCH to report information to the base station. Each UE in each group uses which HS-SICH of the N HS-SICHs, which can be indicated by the Node B through HS-SCCH additional signaling information, and the additional signaling information can also adopt an explicit notification or implicit notification mode. For example: for a group comprising 2 user equipments, the corresponding relationship between the channel estimation window and the HS-SICH can be predetermined, specifically, the HS-PDSCH channel estimation window with odd window number can be predetermined to correspond to the HS-SICH with lower timeslot number and lower code channel number in the 2 HS-SICHs, and the HS-PDSCH channel estimation window with even window number can correspond to the HS-SICH with higher timeslot number and higher code channel number in the 2 HS-SICHs. Then, in the HS-SCCH additional signaling information, only the window number of the channel estimation window may be indicated, or the parity of the window number (for example, 0 may be used to represent an odd window, and 1 is used to identify an even window), and then the UE may determine which HS-SICH reporting information needs to be adopted by itself to the base station according to the predetermined correspondence between the channel estimation window and the HS-SICH according to the window number information of the channel estimation window.

For example: when 1 HS-SCCH corresponds to 2 HS-SICHs, if the 2 HS-SICHs are positioned in different time slots, the HS-SICH positioned in the time slot with lower sequence number is specified to correspond to the channel estimation window of the odd window, and the HS-SICH positioned in the time slot with higher sequence number corresponds to the channel estimation window of the even window; if the 2 HS-SICHs are located in different code channels of the same time slot, the HS-SICH located in the code channel with lower sequence number is defined to correspond to the channel estimation window of the odd window, and the HS-SICH located in the code channel with higher sequence number is defined to correspond to the channel estimation window of the even window.

It should be noted that the Node B may also directly notify the relevant information of the HS-SICH allocated to each UE to the UE, instead of notifying each UE in each group of the HS-SCCH through the HS-SCCH that the received HS-SCCH applies the SDMA technique. If the UE does not receive the related indication information of the HS-SICH specified by the base station, the UE defaults to adopt the main HS-SICH to report the information to the base station, and if the UE receives the related indication information of the HS-SICH specified by the base station, the UE adopts the specified HS-SICH to report the information to the base station.

In embodiment 1, if the number of user equipments in each group for space division exceeds the number N of HS-SICHs corresponding to the HS-SCCH, the user equipments in the group can be divided into N parts, and each part of user equipments commonly uses one HS-SICH.

Example 2:

in this embodiment, the HS-SICHs of multiple SDMA user devices in each group are resource offset processed. That is, when the user equipment accesses the cell, the RNC notifies the UE and the base station of configuration information about the HS-SCCH and the HS-SICH through Radio Resource Control (RRC) signaling, which includes: the corresponding relation between the HS-SCCH and the HS-SICH, the time slot code channels occupied by the HS-SCCH and the HS-SICH, and the number K of channel estimation windows.

And the Node B schedules the accessed user equipment, if a plurality of user equipment in the cell meet the SDMA pairing grouping condition, the user equipment is grouped, the space division of a control channel is carried out on each group of user equipment, and the UE in each group uses the same HS-SCCH. And the Node B informs the UE of the information that the HS-SCCH allocated for each UE in each group applies the SDMA technology in a mode of adding new signaling bits on the HS-SCCH to explicitly inform or in a mode of implicitly informing through unused signaling bit states on the HS-SCCH.

When K of the time slot where the HS-SICH is located is 16, one code channel with SF of 16 occupied by each HS-SICH corresponds to one channel estimation window. In order to improve the space division performance of the HS-SICH, a single HS-SCCH corresponding to multiple HS-SICHs can be set by using the technical solution provided in embodiment 1.

When K of the time slot of the HS-SICH is 8, the channel estimation window used by each HS-SICH corresponds to 2 SF-16 code channels, the HS-SICH corresponding to the HS-SCCH occupies only 1 SF-16 code channel, and another SF-16 code channel may be occupied by another UE in the same group as the HS-SICH.

For example: when 2 UEs are in space, the HS-SICH corresponding to the HS-SCCH may be allocated to the first UE, and another code channel having a code channel with a SF of 16 corresponding to the channel estimation window to which the SF of the HS-SICH of the first UE belongs may be allocated to the second UE, that is, the channel estimation windows corresponding to the HS-SICHs allocated to the first UE and the second UE are the same channel estimation window. The code channel occupied by the HS-SICH of the second UE is added with an offset (equivalent to the offset of the code channel number of SF-16 occupied by the HS-SICH) on the basis of the code channel occupied by the HS-SICH of the first UE. The HS-SICH of the first UE occupies the code channel with the code channel serial number offset of 0, and the HS-SICH of the second UE occupies the code channel with the code channel serial number offset of 1. Such an offset may be signaled to the UE by the Node B via HS-SCCH additional signaling information, which may be explicit or implicit. For example, when implicitly notifying the offset value of the code channel number occupied by the HS-SICH of 2 ues, the corresponding relationship between the channel estimation window and the offset value may be predetermined, specifically, the offset value of the HS-PDSCH channel estimation window of the odd window corresponding to the code channel number of the HS-SICH may be predetermined to be 0, and the offset value of the HS-PDSCH channel estimation window of the even window corresponding to the code channel number of the HS-SICH may be predetermined to be 1. Thus, the ACK/NACK signaling and the CQI signaling corresponding to 2 UEs together form an HS-SICH occupying SF-8 code channels, and the Node B reads the ACK/NACK signaling and the CQI signaling of 2 UEs on 2 SF-16 code channels when receiving the HS-SICH.

When more user equipment is in a space, each group of SDMA user equipment can be divided into two parts, wherein the first part of the user equipment uses the HS-SICH corresponding to the HS-SCCH, and the second part of the user equipment uses another SF-16 code channel corresponding to a channel estimation window to which the SF-16 code channel of the HS-SICH of the first part of the user equipment belongs as the HS-SICH. If K is 8, each channel estimation window corresponds to 2 code channels with SF of 16, when the HS-SCCH of a plurality of user equipments adopts SDMA technology, the user equipments are divided into two parts, the HS-SICH of each part of user equipments occupies the same code channel with SF of 16, and the 2 code channels with SF of 16 occupied by the HS-SICH of the two parts of user equipments correspond to the same channel estimation window. When each group of SDMA user equipment is divided into two parts, the isolation degree of the user equipment in each part is made to be larger as much as possible, namely the space interference of the user equipment in each part is relatively smaller, the isolation degree between the two parts of user equipment can be smaller properly, and the two parts of user equipment respectively occupy 2 different code channels with SF being 16, so that certain gain can be provided.

If K of the time slot in which the HS-SICH is located is less than 8, the channel estimation window to which the HS-SICH code channel belongs corresponds to more SF-16 code channels, for example: when K is 4, each channel estimation window corresponds to 4 code channels with SF of 16. Then, when multiple ues perform SDMA, the SF occupied by HS-SICH of different ues is shifted to 16 code channels, and the shifted SF is shifted to another SF corresponding to the channel estimation window, which is 16 code channels. The user equipments in each group may be further divided into multiple parts, and each part of the user equipments may occupy different SF-16 code channels as HS-SICH. For example: if a group has 4 user equipments, the 4 user equipments respectively occupy different HS-SICHs corresponding to the same channel estimation window, if a group has 8 user equipments, the 8 user equipments can be divided into 4 parts, each part includes 2 user equipments, and each part of user equipments respectively occupies different HS-SICHs corresponding to the same channel estimation window (but 2 user equipments in each part occupy the same HS-SICH).

Referring to fig. 2, a communication system provided in an embodiment of the present invention includes:

the radio network controller 10 is configured to establish a cell and notify the base station 20 and the plurality of user equipments 30 of configuration information of the HS-SCCH and the HS-SICH through higher layer signaling at the time of cell establishment, and includes: the corresponding relation between the HS-SCCH and the HS-SICH, and the time slot code channels occupied by the HS-SCCH and the HS-SICH.

A base station 20, configured to group a plurality of user equipments 30 that satisfy a preset SDMA pairing-grouping condition, and for each group of user equipments 30: allocating the same HS-SCCH for each user equipment 30 in the group, and allocating a plurality of different HS-SICHs for the group of user equipment 30; instructing each user equipment 30 in the group to send information to the base station 20 by using the HS-SICH allocated to the user equipment 30 through the HS-SCCH; the information sent by the group of user devices 30 is received simultaneously by a plurality of different HS-SICHs.

And a plurality of user equipments 30 for receiving the transmission blocks of the HS-PDSCH by decoding the HS-SCCH channel, and feeding back ACK/NACK information, channel quality indication information, and the like to the base station 20 by using the designated HS-SICH channel according to the instruction of the base station 20.

Preferably, referring to fig. 3, a base station according to an embodiment of the present invention includes:

a grouping unit 11, configured to group a plurality of user equipments 30 that satisfy a preset SDMA pairing-grouping condition.

A channel allocating unit 12, configured to allocate, for each group of user equipments 30, the same HS-SCCH to each user equipment 30 in the group, and allocate a plurality of different HS-SICHs to the group of user equipments 30.

And an instructing unit 13, configured to instruct, for each group of user equipments 30, each user equipment 30 in the group to transmit information to the base station 20 by using the HS-SICH allocated to the user equipment 30 through the HS-SCCH allocated to the group of user equipments 30.

And an information receiving unit 14, configured to simultaneously receive, for each group of user equipment 30, information transmitted by the group of user equipment 30 through a plurality of different HS-SICHs.

Preferably, the channel allocating unit 12 includes:

an HS-SCCH allocation unit 121, configured to allocate the same HS-SCCH to each user equipment 30 in each group.

An HS-SICH allocating unit 122, configured to determine multiple HS-SICHs corresponding to the HS-SCCH, and allocate different HS-SICHs in the multiple HS-SICHs to different user equipments 30 in the group; alternatively, multiple HS-SICHs are assigned to the group of user devices 30, where each HS-SICH corresponds to multiple user devices 30 in the group.

Alternatively, the channel allocating unit 12 includes:

An HS-SICH allocation unit 122, configured to determine HS-SICHs corresponding to the HS-SCCHs one to one; determining the HS-SICH corresponding to the same channel estimation window according to the number of the channel estimation windows; allocating different HS-SICHs corresponding to the same channel estimation window to different user equipments 30 in the group of user equipments 30; alternatively, a plurality of different HS-SICHs corresponding to the same channel estimation window are assigned to the group of user equipments 30, wherein each HS-SICH corresponds to a plurality of user equipments 30 in the group.

Preferably, for each group of user equipment 30, the instructing unit 13 notifies the identifier of the HS-SICH allocated to each user equipment 30 in the group to the user equipment 30 through the HS-SCCH allocated to the group of user equipment 30, and instructs the user equipment 30 to send information to the base station 20 by using the HS-SICH corresponding to the identifier; or, the HS-SCCH allocated to the group of user equipment 30 notifies the user equipment 30 of the information of the channel estimation window of the high speed physical downlink shared channel HS-PDSCH allocated to each user equipment 30 in the group, and instructs the user equipment 30 to transmit information to the base station 20 by using the HS-SICH corresponding to the channel estimation window.

In summary, the embodiments of the present invention provide a design scheme for SDMA of HS-SICHs in a TDD system, and the performance of HS-SICHs is greatly improved when SDMA is applied to a control channel by increasing the number of HS-SICHs corresponding to HS-SCCHs or allocating different code channel offsets to the HS-SICHs of each group of SDMA user equipment.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A method for receiving information over a high speed shared information channel, HS-SICH, the method comprising:

2. The method of claim 1, wherein the step of the base station allocating the same HS-SCCH to each user equipment in each group and allocating a plurality of different HS-SICHs to the group of user equipments comprises:

the base station distributes the same HS-SCCH for each user equipment in each group, and determines a plurality of HS-SICHs corresponding to the HS-SCCH;

the base station distributes different HS-SICHs in the plurality of HS-SICHs to different user equipment in the group; or,

and the base station distributes the plurality of HS-SICHs to the group of user equipment, wherein each HS-SICH corresponds to the plurality of user equipment in the group.

3. The method of claim 1, wherein the step of the base station allocating the same HS-SCCH to each user equipment in each group and allocating a plurality of different HS-SICHs to the group of user equipments comprises:

the base station distributes the same HS-SCCH for each user equipment in each group, and determines HS-SICHs which are in one-to-one correspondence with the HS-SCCHs;

the base station determines the HS-SICH corresponding to the same channel estimation window with the HS-SICH according to the number of the channel estimation windows;

the base station distributes different HS-SICHs corresponding to the same channel estimation window to different user equipment in the group of user equipment; or,

and the base station distributes a plurality of different HS-SICHs corresponding to the same channel estimation window to the group of user equipment, wherein each HS-SICH corresponds to a plurality of user equipment in the group.

4. The method of claim 1, 2 or 3, wherein for each group of user equipments, the step of the base station instructing each user equipment in the group to send information to the base station using the HS-SICH allocated for the user equipment through the HS-SCCH allocated for the group of user equipments comprises:

the base station informs the user equipment of the identification of the HS-SICH distributed for each user equipment in the group through the HS-SCCH distributed for the group of user equipment, and instructs the user equipment to adopt the HS-SICH corresponding to the identification to send information to the base station; or,

and the base station informs the user equipment of the information of the channel estimation window of the high-speed physical downlink shared channel HS-PDSCH allocated to each user equipment in the group through the HS-SCCH allocated to the group of user equipment, and instructs the user equipment to adopt the HS-SICH corresponding to the channel estimation window to send the information to the base station.

5. The method of claim 4 wherein the identification of the HS-SICH is a code channel offset value of the HS-SICH, or a time slot code channel number of the HS-SICH, or a relative position identification of the HS-SICH among all HS-SICHs corresponding to the HS-SCCH.

6. The method of claim 4, wherein the information of the channel estimation window is a window number of the channel estimation window or a parity of the window number of the channel estimation window.

7. A base station, comprising:

8. The base station of claim 7, wherein the channel allocation unit comprises:

the HS-SCCH allocation unit is used for allocating the same HS-SCCH for each user equipment in each group;

the HS-SICH allocation unit is used for determining a plurality of HS-SICHs corresponding to the HS-SCCH and allocating different HS-SICHs in the plurality of HS-SICHs to different user equipment in the group; or, the plurality of HS-SICHs are allocated to the group of user equipment, wherein each HS-SICH corresponds to a plurality of user equipment in the group.

9. The base station of claim 7, wherein the channel allocation unit comprises:

the HS-SICH distribution unit is used for determining the HS-SICHs which correspond to the HS-SCCHs one by one; determining the HS-SICH corresponding to the same channel estimation window according to the number of the channel estimation windows; different HS-SICHs corresponding to the same channel estimation window are distributed to different user equipment in the group of user equipment; or allocating a plurality of different HS-SICHs corresponding to the same channel estimation window to the group of user equipment, wherein each HS-SICH corresponds to a plurality of user equipment in the group.

10. The base station of claim 7, 8 or 9, wherein the instructing unit, for each group of user equipments, notifies the user equipment of the identifier of the HS-SICH allocated to each user equipment in the group through the HS-SCCH allocated to the group of user equipments, and instructs the user equipment to transmit information to the base station using the HS-SICH corresponding to the identifier; or notifying the information of the channel estimation window of the high-speed physical downlink shared channel HS-PDSCH allocated to each user equipment in the group to the user equipment through the HS-SCCH allocated to the group of user equipment, and instructing the user equipment to adopt the HS-SICH corresponding to the channel estimation window to send the information to the base station.