diff --git a/core/rtw_security.c b/core/rtw_security.c
index 4a75a86..f8bea04 100644
--- a/core/rtw_security.c
+++ b/core/rtw_security.c
@@ -181,16 +181,8 @@ _func_enter_;
 	if (((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
 		return;
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 	hw_hdr_offset = TXDESC_SIZE +
 		 (((struct xmit_frame*)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
-#else
-	#ifdef CONFIG_TX_EARLY_MODE
-	hw_hdr_offset = TXDESC_OFFSET+EARLY_MODE_INFO_SIZE;
-	#else
-	hw_hdr_offset = TXDESC_OFFSET;
-	#endif
-#endif
 
 	pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + hw_hdr_offset;
 
@@ -666,17 +658,8 @@ _func_enter_;
 	if (((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
 		return _FAIL;
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 	hw_hdr_offset = TXDESC_SIZE +
 		 (((struct xmit_frame*)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
-#else
-	#ifdef CONFIG_TX_EARLY_MODE
-	hw_hdr_offset = TXDESC_OFFSET+EARLY_MODE_INFO_SIZE;
-	#else
-	hw_hdr_offset = TXDESC_OFFSET;
-	#endif
-#endif
-
 	pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + hw_hdr_offset;
 	/* 4 start to encrypt each fragment */
 	if (pattrib->encrypt==_TKIP_){
@@ -1516,16 +1499,8 @@ _func_enter_;
 	if (((struct xmit_frame*)pxmitframe)->buf_addr==NULL)
 		return _FAIL;
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 	hw_hdr_offset = TXDESC_SIZE +
 		 (((struct xmit_frame*)pxmitframe)->pkt_offset * PACKET_OFFSET_SZ);
-#else
-	#ifdef CONFIG_TX_EARLY_MODE
-	hw_hdr_offset = TXDESC_OFFSET+EARLY_MODE_INFO_SIZE;
-	#else
-	hw_hdr_offset = TXDESC_OFFSET;
-	#endif
-#endif
 
 	pframe = ((struct xmit_frame*)pxmitframe)->buf_addr + hw_hdr_offset;
 
diff --git a/core/rtw_xmit.c b/core/rtw_xmit.c
index 0ae7cc2..f0fa5f5 100644
--- a/core/rtw_xmit.c
+++ b/core/rtw_xmit.c
@@ -825,15 +825,7 @@ static s32 xmitframe_addmic(_adapter *padapter, struct xmit_frame *pxmitframe){
 
 _func_enter_;
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 	hw_hdr_offset = TXDESC_SIZE + (pxmitframe->pkt_offset * PACKET_OFFSET_SZ);;
-#else
-	#ifdef CONFIG_TX_EARLY_MODE
-	hw_hdr_offset = TXDESC_OFFSET+ EARLY_MODE_INFO_SIZE;
-	#else
-	hw_hdr_offset = TXDESC_OFFSET;
-	#endif
-#endif
 
 	if (pattrib->encrypt ==_TKIP_)/* if (psecuritypriv->dot11PrivacyAlgrthm==_TKIP_PRIVACY_) */
 	{
@@ -1232,15 +1224,7 @@ _func_enter_;
 
 	pbuf_start = pxmitframe->buf_addr;
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 	hw_hdr_offset =  TXDESC_SIZE + (pxmitframe->pkt_offset * PACKET_OFFSET_SZ);
-#else
-	#ifdef CONFIG_TX_EARLY_MODE /* for SDIO && Tx Agg */
-	hw_hdr_offset = TXDESC_OFFSET + EARLY_MODE_INFO_SIZE;
-	#else
-	hw_hdr_offset = TXDESC_OFFSET;
-	#endif
-#endif
 
 	mem_start = pbuf_start +	hw_hdr_offset;
 
@@ -1476,21 +1460,12 @@ void rtw_count_tx_stats(PADAPTER padapter, struct xmit_frame *pxmitframe, int sz
 	if ((pxmitframe->frame_tag&0x0f) == DATA_FRAMETAG)
 	{
 		pxmitpriv->tx_bytes += sz;
-#if defined(CONFIG_USB_TX_AGGREGATION)
 		pmlmepriv->LinkDetectInfo.NumTxOkInPeriod += pxmitframe->agg_num;
-#else
-		pmlmepriv->LinkDetectInfo.NumTxOkInPeriod++;
-#endif
 
 		psta = pxmitframe->attrib.psta;
-		if (psta)
-		{
+		if (psta) {
 			pstats = &psta->sta_stats;
-#if defined(CONFIG_USB_TX_AGGREGATION)
 			pstats->tx_pkts += pxmitframe->agg_num;
-#else
-			pstats->tx_pkts++;
-#endif
 			pstats->tx_bytes += sz;
 		}
 	}
@@ -1733,10 +1708,7 @@ _func_enter_;
 		pxframe->pkt = NULL;
 		pxframe->pkt_offset = 1;/* default use pkt_offset to fill tx desc */
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 		pxframe->agg_num = 1;
-#endif
-
 		pxframe->ack_report = 0;
 	}
 
diff --git a/hal/rtl8188eu_xmit.c b/hal/rtl8188eu_xmit.c
index 98e0455..fc346f2 100644
--- a/hal/rtl8188eu_xmit.c
+++ b/hal/rtl8188eu_xmit.c
@@ -286,11 +286,9 @@ static s32 update_txdesc(struct xmit_frame *pxmitframe, u8 *pmem, s32 sz ,u8 bag
 			ptxdesc->txdw4 |= cpu_to_le32(QOS);/* QoS */
 
 		/* offset 20 */
-	#ifdef CONFIG_USB_TX_AGGREGATION
 		if (pxmitframe->agg_num > 1){
 			ptxdesc->txdw5 |= cpu_to_le32((pxmitframe->agg_num << USB_TXAGG_NUM_SHT) & 0xFF000000);
 		}
-	#endif
 
 		if ((pattrib->ether_type != 0x888e) &&
 		    (pattrib->ether_type != 0x0806) &&
@@ -588,7 +586,6 @@ static s32 rtw_dump_xframe(_adapter *padapter, struct xmit_frame *pxmitframe)
 	return ret;
 }
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 static u32 xmitframe_need_length(struct xmit_frame *pxmitframe)
 {
 	struct pkt_attrib *pattrib = &pxmitframe->attrib;
@@ -607,7 +604,6 @@ static u32 xmitframe_need_length(struct xmit_frame *pxmitframe)
 	return len;
 }
 
-#define IDEA_CONDITION 1	/*  check all packets before enqueue */
 s32 rtl8188eu_xmitframe_complete(_adapter *padapter, struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
 {
 	HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(padapter);
@@ -633,10 +629,6 @@ s32 rtl8188eu_xmitframe_complete(_adapter *padapter, struct xmit_priv *pxmitpriv
 	/*  dump frame variable */
 	u32 ff_hwaddr;
 
-#ifndef IDEA_CONDITION
-	int res = _SUCCESS;
-#endif
-
 	RT_TRACE(_module_rtl8192c_xmit_c_, _drv_info_, ("+xmitframe_complete\n"));
 
 
@@ -659,23 +651,6 @@ s32 rtl8188eu_xmitframe_complete(_adapter *padapter, struct xmit_priv *pxmitpriv
 			return false;
 		}
 
-#ifndef IDEA_CONDITION
-		if (pxmitframe->frame_tag != DATA_FRAMETAG) {
-			RT_TRACE(_module_rtl8192c_xmit_c_, _drv_err_,
-				 ("xmitframe_complete: frame tag(%d) is not DATA_FRAMETAG(%d)!\n",
-				  pxmitframe->frame_tag, DATA_FRAMETAG));
-			continue;
-		}
-
-		/*  TID 0~15 */
-		if ((pxmitframe->attrib.priority < 0) ||
-		    (pxmitframe->attrib.priority > 15)) {
-			RT_TRACE(_module_rtl8192c_xmit_c_, _drv_err_,
-				 ("xmitframe_complete: TID(%d) should be 0~15!\n",
-				  pxmitframe->attrib.priority));
-			continue;
-		}
-#endif
 		pxmitframe->pxmitbuf = pxmitbuf;
 		pxmitframe->buf_addr = pxmitbuf->pbuf;
 		pxmitbuf->priv_data = pxmitframe;
@@ -687,14 +662,7 @@ s32 rtl8188eu_xmitframe_complete(_adapter *padapter, struct xmit_priv *pxmitpriv
 		pxmitframe->pkt_offset = 1; /*  first frame of aggregation, reserve offset */
 		#endif
 
-#ifdef IDEA_CONDITION
 		rtw_xmitframe_coalesce(padapter, pxmitframe->pkt, pxmitframe);
-#else
-		res = rtw_xmitframe_coalesce(padapter, pxmitframe->pkt, pxmitframe);
-		if (res == false) {
-			continue;
-		}
-#endif
 
 		/*  always return ndis_packet after rtw_xmitframe_coalesce */
 		rtw_os_xmit_complete(padapter, pxmitframe);
@@ -775,39 +743,9 @@ s32 rtl8188eu_xmitframe_complete(_adapter *padapter, struct xmit_priv *pxmitpriv
 		ptxservq->qcnt--;
 		phwxmit->accnt--;
 
-#ifndef IDEA_CONDITION
-		/*  suppose only data frames would be in queue */
-		if (pxmitframe->frame_tag != DATA_FRAMETAG) {
-			RT_TRACE(_module_rtl8192c_xmit_c_, _drv_err_,
-				 ("xmitframe_complete: frame tag(%d) is not DATA_FRAMETAG(%d)!\n",
-				  pxmitframe->frame_tag, DATA_FRAMETAG));
-			rtw_free_xmitframe(pxmitpriv, pxmitframe);
-			continue;
-		}
-
-		/*  TID 0~15 */
-		if ((pxmitframe->attrib.priority < 0) ||
-		    (pxmitframe->attrib.priority > 15)) {
-			RT_TRACE(_module_rtl8192c_xmit_c_, _drv_err_,
-				 ("xmitframe_complete: TID(%d) should be 0~15!\n",
-				  pxmitframe->attrib.priority));
-			rtw_free_xmitframe(pxmitpriv, pxmitframe);
-			continue;
-		}
-#endif
-
 		pxmitframe->buf_addr = pxmitbuf->pbuf + pbuf;
 
-#ifdef IDEA_CONDITION
 		rtw_xmitframe_coalesce(padapter, pxmitframe->pkt, pxmitframe);
-#else
-		res = rtw_xmitframe_coalesce(padapter, pxmitframe->pkt, pxmitframe);
-		if (res == false) {
-			DBG_88E("%s coalesce failed\n",__func__);
-			rtw_free_xmitframe(pxmitpriv, pxmitframe);
-			continue;
-		}
-#endif
 		/*  always return ndis_packet after rtw_xmitframe_coalesce */
 		rtw_os_xmit_complete(padapter, pxmitframe);
 
@@ -889,86 +827,6 @@ s32 rtl8188eu_xmitframe_complete(_adapter *padapter, struct xmit_priv *pxmitpriv
 	return true;
 }
 
-#else
-
-s32 rtl8188eu_xmitframe_complete(_adapter *padapter, struct xmit_priv *pxmitpriv, struct xmit_buf *pxmitbuf)
-{
-
-	struct hw_xmit *phwxmits;
-	sint hwentry;
-	struct xmit_frame *pxmitframe=NULL;
-	int res=_SUCCESS, xcnt = 0;
-
-	phwxmits = pxmitpriv->hwxmits;
-	hwentry = pxmitpriv->hwxmit_entry;
-
-	RT_TRACE(_module_rtl871x_xmit_c_,_drv_info_,("xmitframe_complete()\n"));
-
-	if (pxmitbuf==NULL)
-	{
-		pxmitbuf = rtw_alloc_xmitbuf(pxmitpriv);
-		if (!pxmitbuf)
-		{
-			return false;
-		}
-	}
-
-
-	do
-	{
-		pxmitframe =  rtw_dequeue_xframe(pxmitpriv, phwxmits, hwentry);
-
-		if (pxmitframe)
-		{
-			pxmitframe->pxmitbuf = pxmitbuf;
-
-			pxmitframe->buf_addr = pxmitbuf->pbuf;
-
-			pxmitbuf->priv_data = pxmitframe;
-
-			if ((pxmitframe->frame_tag&0x0f) == DATA_FRAMETAG)
-			{
-				if (pxmitframe->attrib.priority<=15)/* TID0~15 */
-				{
-					res = rtw_xmitframe_coalesce(padapter, pxmitframe->pkt, pxmitframe);
-				}
-				rtw_os_xmit_complete(padapter, pxmitframe);/* always return ndis_packet after rtw_xmitframe_coalesce */
-			}
-
-
-			RT_TRACE(_module_rtl871x_xmit_c_,_drv_info_,("xmitframe_complete(): rtw_dump_xframe\n"));
-
-
-			if (res == _SUCCESS)
-			{
-				rtw_dump_xframe(padapter, pxmitframe);
-			}
-			else
-			{
-				rtw_free_xmitbuf(pxmitpriv, pxmitbuf);
-				rtw_free_xmitframe(pxmitpriv, pxmitframe);
-			}
-
-			xcnt++;
-
-		}
-		else
-		{
-			rtw_free_xmitbuf(pxmitpriv, pxmitbuf);
-			return false;
-		}
-
-		break;
-
-	}while (0/*xcnt < (NR_XMITFRAME >> 3)*/);
-
-	return true;
-
-}
-#endif
-
-
-
 static s32 xmitframe_direct(_adapter *padapter, struct xmit_frame *pxmitframe)
 {
 	s32 res = _SUCCESS;
diff --git a/hal/usb_halinit.c b/hal/usb_halinit.c
index 3b29044..d6fb55e 100644
--- a/hal/usb_halinit.c
+++ b/hal/usb_halinit.c
@@ -118,10 +118,8 @@ static void rtl8188eu_interface_configure(_adapter *padapter)
 
 	pHalData->interfaceIndex = pdvobjpriv->InterfaceNumber;
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 	pHalData->UsbTxAggMode		= 1;
 	pHalData->UsbTxAggDescNum	= 0x6;	/*  only 4 bits */
-#endif
 
 #ifdef CONFIG_USB_RX_AGGREGATION
 	pHalData->UsbRxAggMode		= USB_RX_AGG_DMA;/*  USB_RX_AGG_DMA; */
@@ -779,7 +777,6 @@ usb_AggSettingTxUpdate(
 		PADAPTER			Adapter
 	)
 {
-#ifdef CONFIG_USB_TX_AGGREGATION
 	HAL_DATA_TYPE	*pHalData = GET_HAL_DATA(Adapter);
 	u32			value32;
 
@@ -793,8 +790,6 @@ usb_AggSettingTxUpdate(
 
 		rtw_write32(Adapter, REG_TDECTRL, value32);
 	}
-
-#endif
 }	/*  usb_AggSettingTxUpdate */
 
 
diff --git a/include/autoconf.h b/include/autoconf.h
index ccd48e7..ffc17ec 100644
--- a/include/autoconf.h
+++ b/include/autoconf.h
@@ -85,10 +85,7 @@
  * Interface  Related Config
  */
 
-#ifndef CONFIG_MINIMAL_MEMORY_USAGE
-	#define CONFIG_USB_TX_AGGREGATION
-	#define CONFIG_USB_RX_AGGREGATION
-#endif
+#define CONFIG_USB_RX_AGGREGATION
 
 #define CONFIG_PREALLOC_RECV_SKB
 
@@ -126,7 +123,6 @@
 #ifdef CONFIG_MP_INCLUDED
 	#define MP_DRIVER 1
 	#define CONFIG_MP_IWPRIV_SUPPORT
-	//#undef CONFIG_USB_TX_AGGREGATION
 	//#undef CONFIG_USB_RX_AGGREGATION
 #else
 	#define MP_DRIVER 0
@@ -166,10 +162,6 @@
 
 //#endif
 
-#ifdef CONFIG_USB_TX_AGGREGATION
-//#define	CONFIG_TX_EARLY_MODE
-#endif
-
 #ifdef CONFIG_TX_EARLY_MODE
 #define	RTL8188E_EARLY_MODE_PKT_NUM_10	0
 #endif
diff --git a/include/rtl8188e_hal.h b/include/rtl8188e_hal.h
index 70db6c0..443f78f 100644
--- a/include/rtl8188e_hal.h
+++ b/include/rtl8188e_hal.h
@@ -479,10 +479,8 @@ typedef struct hal_data_8188e
 	u32	IntArray[3];//HISR0,HISR1,HSISR
 	u32	IntrMask[3];
 	u8	C2hArray[16];
-#ifdef CONFIG_USB_TX_AGGREGATION
 	u8	UsbTxAggMode;
 	u8	UsbTxAggDescNum;
-#endif
 #ifdef CONFIG_USB_RX_AGGREGATION
 	u16	HwRxPageSize;				// Hardware setting
 	u32	MaxUsbRxAggBlock;
diff --git a/include/rtl8188e_recv.h b/include/rtl8188e_recv.h
index 259ed76..7a85475 100644
--- a/include/rtl8188e_recv.h
+++ b/include/rtl8188e_recv.h
@@ -36,11 +36,7 @@
 	#define NR_RECVBUFF (4)
 #endif //CONFIG_SINGLE_RECV_BUF
 
-#ifndef CONFIG_MINIMAL_MEMORY_USAGE
-	#define MAX_RECVBUF_SZ (15360) // 15k < 16k
-#else
-	#define MAX_RECVBUF_SZ (4000) // about 4K
-#endif
+#define MAX_RECVBUF_SZ (15360) // 15k < 16k
 
 struct phy_stat {
 	unsigned int phydw0;
diff --git a/include/rtw_xmit.h b/include/rtw_xmit.h
index a0a29e7..450e8b3 100644
--- a/include/rtw_xmit.h
+++ b/include/rtw_xmit.h
@@ -24,11 +24,7 @@
 #include <osdep_service.h>
 #include <drv_types.h>
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 #define MAX_XMITBUF_SZ	(20480)	// 20k
-#else
-#define MAX_XMITBUF_SZ	(2048)
-#endif
 #ifdef CONFIG_SINGLE_XMIT_BUF
 #define NR_XMITBUFF	(1)
 #else
@@ -266,11 +262,8 @@ struct xmit_frame
 	u8	*buf_addr;
 	struct xmit_buf *pxmitbuf;
 
-#ifdef CONFIG_USB_TX_AGGREGATION
 	u8	agg_num;
-#endif
 	s8	pkt_offset;
-
 	u8 ack_report;
 };